GUARANTY NATIONAL CORP
SC 14D1, 1996-05-08
FIRE, MARINE & CASUALTY INSURANCE
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                 SCHEDULE 14D-1

                   Tender Offer Statement Pursuant to Section
                 14(d)(1) of the Securities Exchange Act of 1934

                          Guaranty National Corporation
                            (Name of Subject Company)

                            Orion Capital Corporation
                        The Connecticut Indemnity Company
                     Connecticut Specialty Insurance Company
                     Design Professionals Insurance Company
                              EBI Indemnity Company
                       Employee Benefits Insurance Company
             The Fire and Casualty Insurance Company of Connecticut
                     Security Insurance Company of Hartford
                                    (Bidder)

                     Common Stock, par value $1.00 Per Share
                         (Title of Class of Securities)
 
                                   401192109
                      (CUSIP Number of Class of Securities)

                            Michael P. Maloney, Esq.
                            Orion Capital Corporation
                                600 Fifth Avenue
                          New York, New York 10020-2302
                                 (212) 332-8080
           (Name, address and telephone number of person authorized to
             receive notices and communications on behalf of bidder)

                                    Copy to:

                              John J. McCann, Esq.
                         Donovan Leisure Newton & Irvine
                              30 Rockefeller Plaza
                            New York, New York 10112

                                 (212) 632-3000
<PAGE>   2
Calculation of Filing Fee

<TABLE>
<CAPTION>

         Transaction
          valuation                         Amount of filing fee
         ------------                       --------------------- 
<S>                                         <C>
         $80,500,000                               $16,100
</TABLE>



*        For purposes of calculating the filing fee only. This calculation
         assumes the purchase of 4,600,000 shares of common stock, par value
         $1.00 per share, of Guaranty National Corporation at $17.50 net per
         share in cash.

**       The amount of the filing fee, calculated in accordance with Rule
         0-11(d) of the Securities Exchange Act of 1934, as amended, equals
         1/50th of one percent of the aggregate cash value offered for such
         number of shares.

[ ] Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
and identify the filing with which the offsetting fee was previously paid.
Identify the previous filing by registration statement number, or the Form or
Schedule and the date of its filing.

Amount Previously Paid:  _______________________________________________________

Form or Registration No.:  _____________________________________________________

Filing Party:  _________________________________________________________________

Date Filed:  ___________________________________________________________________

                                       -2-
<PAGE>   3
Item 1.  Security and Subject Company

         (a) The name of the subject company is Guaranty National Corporation, a
Colorado corporation (the "Company"), which has its principal executive offices
at 9800 South Meridian Boulevard, Englewood, Colorado 80112.

         (b) This Tender Offer Statement on Schedule 14D-1 (the "Statement")
relates to the offer by Orion Capital Corporation ("Orion") and the following of
its wholly-owned subsidiaries: The Connecticut Indemnity Company, Connecticut
Specialty Insurance Company, Design Professionals Insurance Company, EBI
Indemnity Company, Employee Benefits Insurance Company, The Fire and Casualty
Insurance Company of Connecticut and Security Insurance Company of Hartford
(collectively with Orion, the "Purchasers") to purchase up to 4,600,000 shares
of Common Stock, par value $1.00 per share (the "Shares"), of the Company for
$17.50 per Share net to the seller in cash upon the terms and subject to the
conditions set forth in the Offer to Purchase dated May 8, 1996 (the "Offer to
Purchase"), and the related Letter of Transmittal (which together constitute the
"Offer"), copies of which are attached hereto as Exhibits (a)(1) and (a)(2),
respectively. According to the Company's Quarterly Report on Form 10-Q for the
period ended March 31, 1996 (the "March 10-Q"), the number of Shares outstanding
as of May 6, 1996 was 14,961,354. The Purchasers beneficially own 7,409,942
outstanding Shares as of the date hereof. The information set forth under
"INTRODUCTION" and "THE OFFER -- Section 1. Terms of the Offer; Expiration Date"
in the Offer to Purchase is incorporated herein by reference.

         (c) The information set forth under "THE OFFER -Section 5. Price Range
of Shares; Dividends" of the Offer to Purchase is incorporated herein by
reference.

Item 2.  Identity and Background

         (a)-(d) and (g)  This Statement is being filed by the Purchasers.  The
information set forth under "THE OFFER -- Section 8. Certain Information
Concerning the Purchasers" and Schedule I in the Offer to Purchase is
incorporated herein by reference.

         (e) and (f) During the last five years, neither the Purchasers nor, to
the best of their knowledge, any of the persons listed in Schedule I of the
Offer to Purchase, (i) has been convicted in a criminal proceeding (excluding
traffic violations or similar misdemeanors), or (ii) was a party to a civil
proceeding of a judicial or administrative body of competent jurisdiction and as
a result of which was

                                       -3-
<PAGE>   4
or is subject to a judgment, decree or final order enjoining future violations
of, or prohibiting activities subject to, federal or state securities laws or
finding any violation of such laws.

Item 3.  Past Contacts, Transactions or Negotiations with the Subject Company.

         (a)-(b) The information set forth under "SPECIAL FACTORS -- Background
of the Transaction," "SPECIAL FACTORS -- Purpose and Structure of the
Transactions; Plans for the Company After the Offer" and "SPECIAL FACTORS --
Interests of Certain Persons in the Transaction; Securities Ownership; Related
Transactions," "SPECIAL FACTORS -- Certain Effects of the Transaction" and "THE
OFFER -- Section 8. Certain Information Concerning the Purchasers" in the Offer
to Purchase is incorporated herein by reference.

Item 4.  Source and Amount of Funds or Other Consideration.

         (a)  The information set forth in the Offer to Purchase under "SPECIAL
FACTORS -- Source and Amount of Funds -- Financing of the Offer" is incorporated
herein by reference.

         (b)  Not applicable.

         (c)  Not applicable.

Item 5. Purpose of the Tender Offer and Plans or Proposals of the Bidder.

         (a)-(g) The information set forth under "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Purpose and
Structure of the Transaction; Plans for the Company After the Offer," "SPECIAL
FACTORS -- Certain Effects of the Transaction," "SPECIAL FACTORS -- Fairness of
the Offer," "THE OFFER --
 Section 6. Effect of the Offer on the Market for the Shares; Quotation on NYSE;
Registration under the Exchange Act" and "THE OFFER -- Section 11. Certain Legal
Matters" in the Offer to Purchase is incorporated herein by reference.

Item 6.  Interest in Securities of the Subject Company.

         (a)-(b) The information set forth under "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Purpose and
Structure of the Transaction; Plans for the Company After the Offer," "SPECIAL
FACTORS -- Interests of Certain Persons in the Transaction; Securities
Ownership; Related Transactions,"

                                       -4-
<PAGE>   5
"THE OFFER -- Section 8. Certain Information Concerning the Purchasers" and
Schedule I in the Offer to Purchase is incorporated herein by reference.

Item 7.           Contracts, Arrangements, Understandings or Relationships with
                  Respect to the Subject Company's Securities.

         The information set forth under "INTRODUCTION," "SPECIAL FACTORS --
Background of the Transaction," "SPECIAL FACTORS -- Interests of Certain Persons
in the Transaction; Securities Ownership; Related Transactions," "THE OFFER --
Section 8. Certain Information Concerning the Purchasers" and "THE OFFER --
Section 11. Certain Legal Matters" in the Offer to Purchase is incorporated
herein by reference.

Item 8.           Persons Retained, Employed or to be Compensated.

         The information set forth in the Offer to Purchase under
"INTRODUCTION," and "THE OFFER -- Section 12. Fees and Expenses" is incorporated
herein by reference.

Item 9.  Financial Statements of Certain Bidders.

         Not Applicable.

         Certain information relating to the Purchasers set forth in the Offer
to Purchase under "THE OFFER -- Section 8. Certain Information Concerning the
Purchasers" is incorporated herein by reference.

Item 10.  Additional Information.

         (a) The information set forth in the Offer to Purchase under
"INTRODUCTION," "SPECIAL FACTORS -- Purpose and Structure of the Transaction;
Plans for the Company After the Offer" and "SPECIAL FACTORS -- Certain Effects
of the Transaction" is incorporated herein by reference.

         (b)-(e) The information set forth in the Offer to Purchase under
"INTRODUCTION," "SPECIAL FACTORS -- Purpose and Structure of the Transaction;
Plans for the Company After the Offer," "THE OFFER -- Section 6. Effect of the
Offer on the Market for the Shares; Quotation on the NYSE; Registration Under
the Exchange Act," "THE OFFER -- Section 11. Certain Legal Matters" is
incorporated herein by reference. Inclusion of such information herein shall not
be deemed to be an admission of the materiality thereof by the Purchasers.

         (f)      Whether or not otherwise specifically referenced in response
to the Items of this Statement, the information

                                       -5-
<PAGE>   6
contained in the Offer to Purchase and the Letter of Transmittal, which are
attached hereto as Exhibits (a)(1) and (a)(2) respectively, as well as all terms
and conditions of the Offer, are incorporated herein by reference.

Item 11.  Material Filed Exhibits.

         (a)(1)   Offer to Purchase dated May 8, 1996.

         (a)(2)   Letter of Transmittal.

         (a)(3)   Notice of Guaranteed Delivery.

         (a)(4)   Letter to Securities Dealers, Commercial Banks and Trust 
Companies.

         (a)(5)   Letter from Brokers, Dealers, Commercial Banks, Trust
Companies and Nominees to their Clients.

         (a)(6)   Press Release issued on May 7, 1996.

         (a)(7)   Summary Advertisement dated May 8, 1996.

         (a)(8)   Guidelines for Certification of Taxpayer Identification Number
on Substitute Form W-9.

         (b)  Not applicable.

         (c)(1) Shareholder Agreement, dated November 7, 1991, by and among
Guaranty National Corporation, Orion Capital Corporation, The Connecticut
Indemnity Company, Connecticut Specialty Insurance Company, Design Professionals
Insurance Company, Employee Benefits Insurance Company, The Fire and Casualty
Insurance Company of Connecticut, Security Insurance Company of Hartford and
Security Reinsurance Company.

         (c)(2) Amendment to Shareholder Agreement, dated February 2, 1994, by
and among Guaranty National Corporation, Orion Capital Corporation, The
Connecticut Indemnity Company, Connecticut Specialty Insurance Company, Design
Professionals Insurance Company, Employee Benefits Insurance Company, The Fire
and Casualty Insurance Company of Connecticut, Security Insurance Company of
Hartford and Security Reinsurance Company.

         (c)(3) Amendment to Shareholder Agreement, dated March 2, 1995, by and
among Guaranty National Corporation, Orion Capital Corporation, The Connecticut
Indemnity Company, Connecticut Specialty Insurance Company, Design Professionals
Insurance Company, Employee Benefits Insurance Company, The Fire and Casualty
Insurance Company of

                                       -6-
<PAGE>   7
Connecticut, Security Insurance Company of Hartford and Security Reinsurance 
Company.

         (c)(4) Note Issuance Agreement, as Amended and Restated as of June 14,
1995, by and among Guaranty National Corporation, Orion Capital Corporation, The
Connecticut Indemnity Company, Connecticut Specialty Insurance Company, Design
Professionals Insurance Company, Employee Benefits Insurance Company, EBI
Indemnity Company, The Fire and Casualty Insurance Company of Connecticut,
Security Insurance Company of Hartford, Security Reinsurance Company and
SecurityRe, Inc.

         (d)  Not applicable.

         (e)  Not applicable.

         (f)  Not applicable.

         (g) Rule 13e-3 Transaction Statement on Schedule 13E-3 dated May 8,
1996 of Orion Capital Corporation, The Connecticut Indemnity Company,
Connecticut Specialty Insurance Company, Design Professionals Insurance Company,
EBI Indemnity Company, Employee Benefits Insurance Company, The Fire and
Casualty Insurance Company of Connecticut and Security Insurance Company of
Hartford.

                                       -7-
<PAGE>   8
                                    SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated:  May 8, 1996

                                            ORION CAPITAL CORPORATION

                                            By /s/ Alan R. Gruber
                                              ----------------------------------
                                               Name:  Alan R. Gruber
                                               Title: Chairman & Chief Executive
                                                      Officer

                                            THE CONNECTICUT INDEMNITY COMPANY

                                            CONNECTICUT SPECIALTY INSURANCE
                                              COMPANY

                                            DESIGN PROFESSIONALS INSURANCE
                                              COMPANY

                                            EBI INDEMNITY COMPANY

                                            EMPLOYEE BENEFITS INSURANCE COMPANY

                                            THE FIRE AND CASUALTY INSURANCE
                                              COMPANY OF CONNECTICUT

                                            SECURITY INSURANCE COMPANY OF
                                              HARTFORD

                                            By /s/ Alan R. Gruber
                                              ----------------------------------
                                               Name:  Alan R. Gruber
                                               Title: Chairman



                                       -8-
<PAGE>   9
                                  EXHIBIT INDEX

Exhibit                            Description

(a)(1)            Offer to Purchase dated May 8, 1996.

(a)(2)            Letter of Transmittal.

(a)(3)            Notice of Guaranteed Delivery.

(a)(4)            Letter to Securities Dealers, Commercial Banks and Trust 
                  Companies.

(a)(5)            Letter from Brokers, Dealers, Commercial Banks, Trust 
                  Companies and Nominees to their Clients.

(a)(6)            Press Release issued on May 7, 1996.

(a)(7)            Summary Advertisement dated May 8, 1996.

(a)(8)            Guidelines for Certification of Taxpayer Identification Number
                  on Substitute Form W-9.

(c)(1)            Shareholder Agreement, dated November 7, 1991, by and among 
                  Guaranty National Corporation, Orion Capital Corporation, The
                  Connecticut Indemnity Company, Connecticut Specialty Insurance
                  Company, Design Professionals Insurance Company, Employee
                  Benefits Insurance Company, The Fire and Casualty Insurance
                  Company of Connecticut, Security Insurance Company of Hartford
                  and Security Reinsurance Company.

(c)(2)            Amendment to Shareholder Agreement, dated February 2, 1994, by
                  and among Guaranty National Corporation, Orion Capital
                  Corporation, The Connecticut Indemnity Company, Connecticut
                  Specialty Insurance Company, Design Professionals Insurance
                  Company, Employee Benefits Insurance Company, The Fire and
                  Casualty Insurance Company of Connecticut, Security Insurance
                  Company of Hartford and Security Reinsurance Company.

(c)(3)            Amendment to Shareholder Agreement, dated March 2, 1995, by 
                  and among Guaranty National Corporation, Orion Capital
                  Corporation, The Connecticut Indemnity Company, Connecticut
                  Specialty Insurance Company, Design Professionals Insurance
                  Company, Employee Benefits Insurance Company, The Fire and
                  Casualty Insurance Company of Connecticut,

                                       -9-
<PAGE>   10
                  Security Insurance Company of Hartford and Security
                  Reinsurance Company.

(c)(4)            Note Issuance Agreement, as Amended and Restated as of June
                  14, 1995, by and among Guaranty National Corporation, Orion
                  Capital Corporation, The Connecticut Indemnity Company,
                  Connecticut Specialty Insurance Company, Design Professionals
                  Insurance Company, Employee Benefits Insurance Company, EBI
                  Indemnity Company, The Fire and Casualty Insurance Company of
                  Connecticut, Security Insurance Company of Hartford, Security
                  Reinsurance Company and SecurityRe, Inc.

(g)               Rule 13e-3 Transaction Statement on Schedule 13E-3 dated May
                   8, 1996 of Orion Capital Corporation. The Connecticut
                  Indemnity Company, Connecticut Specialty Insurance Company,
                  Design Professionals Insurance Company, EBI Indemnity Company,
                  Employee Benefits Insurance Company, The Fire and Casualty
                  Insurance Company of Connecticut and Security Insurance
                  Company of Hartford.


                                      -10-


<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                     UP TO 4,600,000 SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)
 
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
                                       AT
 
                              $17.50 NET PER SHARE
                                       BY
 
                           ORION CAPITAL CORPORATION
                                      AND
 
             CERTAIN OF ITS WHOLLY-OWNED SUBSIDIARIES NAMED HEREIN
     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00
   MIDNIGHT, NEW YORK CITY TIME, ON WEDNESDAY, JUNE 5, 1996, UNLESS THE OFFER
                                  IS EXTENDED.
 
     THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING
TENDERED. HOWEVER, THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I)
EXPIRATION OR EARLIER TERMINATION OF ALL APPLICABLE WAITING PERIODS UNDER THE
HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED, AND (II) THE
RECEIPT OF ALL REQUIRED STATE INSURANCE DEPARTMENT REGULATORY APPROVALS ON TERMS
AND CONDITIONS SATISFACTORY TO THE PURCHASERS. THE OFFER IS ALSO SUBJECT TO
OTHER TERMS AND CONDITIONS. SEE "THE OFFER" -- SECTION 10. IF MORE THAN
4,600,000 SHARES ARE PROPERLY TENDERED AND NOT WITHDRAWN, THEN, SUBJECT TO THE
TERMS AND CONDITIONS OF THE OFFER, SUCH SHARES WILL BE ACCEPTED ON A PRO RATA
BASIS. SEE "THE OFFER" -- SECTION 2.
 
                         ------------------------------
 
                                   IMPORTANT
 
     Any stockholder desiring to tender all or any portion of his Shares should
either (1) request his broker, dealer, commercial bank, trust company or other
nominee to effect the transaction for him or (2) complete and sign the enclosed
Letter of Transmittal (or facsimile thereof) in accordance with the instructions
in the Letter of Transmittal and mail or deliver the Letter of Transmittal and
other required documents and guaranteed signatures to the Depositary and either
deliver the certificates for such Shares to the Depositary along with the Letter
of Transmittal or deliver such Shares pursuant to the procedure for book-entry
transfer set forth in THE OFFER -- Section 3. A stockholder whose Shares are
registered in the name of a broker, dealer, commercial bank, trust company or
other nominee must contact such broker, dealer, commercial bank, trust company
or other nominee if he desires to tender such Shares.
 
     Any stockholder who desires to tender Shares and whose certificates for
such Shares are not immediately available, or who is unable to deliver all
documents required by the Letter of Transmittal to the Depositary prior to the
expiration of the Offer, or who cannot complete the procedure for book-entry
transfer on a timely basis, may tender such Shares by following the procedures
for guaranteed delivery set forth in THE OFFER -- Section 3.
 
     Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
set forth on the back cover of this Offer to Purchase. Additional copies of this
Offer to Purchase, the Letter of Transmittal and the Notice of Guaranteed
Delivery may be obtained from the Information Agent or from brokers, dealers,
commercial banks or trust companies.
 
     THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION, NOR HAS THE COMMISSION PASSED UPON THE FAIRNESS OR MERITS
OF SUCH TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF THE INFORMATION
CONTAINED IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.
 
                         ------------------------------
 
                      The Dealer Manager for the Offer is:
                          DONALDSON, LUFKIN & JENRETTE
                               SECURITIES CORPORATION
                                  May 8, 1996
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----
<S>     <C>                                                                               <C>
INTRODUCTION..........................................................................       1
SPECIAL FACTORS.......................................................................       3
  Background of the Transaction.......................................................       3
  Fairness of the Offer...............................................................       4
  Purpose and Structure of the Transaction; Plans for the Company After the Offer.....       6
  Certain Effects of the Transaction..................................................       7
  Interests of Certain Persons in the Transaction; Securities Ownership; Related
  Transactions........................................................................       8
  Dissenters' Rights..................................................................      12
  Certain Federal Income Tax Consequences.............................................      12
  Source and Amount of Funds -- Financing of the Offer................................      13
THE OFFER.............................................................................      13
 1.     Terms of the Offer; Expiration Date...........................................      13
 2.     Acceptance for Payment and Payment for Shares; Proration......................      14
 3.     Procedures for Accepting the Offer and Tendering Shares.......................      16
 4.     Withdrawal Rights.............................................................      18
 5.     Price Range of Shares; Dividends..............................................      19
 6.     Effect of the Offer on the Market for the Shares; Listing on the NYSE;
          Registration Under the Exchange Act.........................................      19
 7.     Certain Information Concerning the Company....................................      21
 8.     Certain Information Concerning the Purchasers.................................      24
 9.     Dividends and Distributions...................................................      26
10.     Certain Conditions of the Offer...............................................      27
11.     Certain Legal Matters.........................................................      29
12.     Fees and Expenses.............................................................      32
13.     Miscellaneous.................................................................      33
Schedule I -- Directors and Executive Officers of the Purchasers......................     I-1
</TABLE>
<PAGE>   3
 
To the Holders of Common Stock of
  GUARANTY NATIONAL CORPORATION:
 
                                  INTRODUCTION
 
     Orion Capital Corporation, a Delaware corporation ("Orion"), and certain of
its wholly-owned subsidiaries named below (collectively referred to herein with
Orion as the "Purchasers"), hereby offer to purchase up to 4,600,000 outstanding
shares of Common Stock, par value $1.00 per share, of Guaranty National
Corporation, a Colorado corporation (the "Company"), at $17.50 per Share, net to
the seller in cash, without interest, upon the terms and subject to the
conditions set forth in this Offer to Purchase and in the related Letter of
Transmittal (which, as amended from time to time, together constitute the
"Offer"). Each outstanding share of Common Stock of the Company is referred
herein to as a "Share." The name of each Purchaser and the percentage of Shares
to be purchased by it pursuant to the Offer are as follows: Orion (17.4%), The
Connecticut Indemnity Company (15.0%), Connecticut Specialty Insurance Company
(2.5%), Design Professionals Insurance Company (3.5%), EBI Indemnity Company
(2.9%), Employee Benefits Insurance Company (2.9%), The Fire and Casualty
Insurance Company of Connecticut (5.2%) and Security Insurance Company of
Hartford (50.6%). Each Purchaser reserves the right to purchase any Shares not
purchased by the other Purchasers. The Purchasers also reserve the right to
amend the Offer to reduce the number of Shares which will be purchased pursuant
to the Offer, including as a result of the Insurance Regulatory Condition (as
defined below).
 
     Unless the context otherwise requires, all references to Shares shall
include any associated stock purchase rights (the "Rights") pursuant to the
Rights Agreement dated November 20, 1991 between the Company and its rights
agent and all benefits that may inure to holders thereof. Based upon publicly
available information, Orion believes that, as of the date of this Offer to
Purchase, the Rights are attached to the Shares and are not separately
transferable or exercisable and will not become so by reason of the Offer by the
Purchasers. See THE OFFER -- Section 11.
 
     Tendering stockholders will not be obligated to pay brokerage commissions
or, except as set forth in Instruction 6 of the Letter of Transmittal, transfer
taxes on the purchase of Shares pursuant to the Offer. Orion will pay all
charges and expenses of State Street Bank and Trust Company (the "Depositary"),
D.F. King & Co., Inc. (the "Information Agent") and Donaldson, Lufkin & Jenrette
Securities Corporation, which is acting as Dealer Manager (the "Dealer Manager")
in connection with the Offer. See THE OFFER -- Section 12.
 
     THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING
TENDERED. HOWEVER, THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I)
EXPIRATION OR EARLIER TERMINATION OF ALL APPLICABLE WAITING PERIODS UNDER THE
HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED, AND (II) THE
RECEIPT OF ALL REQUIRED STATE INSURANCE DEPARTMENT REGULATORY APPROVALS ON TERMS
AND CONDITIONS SATISFACTORY TO THE PURCHASERS (THE "INSURANCE REGULATORY
CONDITION"). SUCH FOREGOING CONDITIONS AND THE OTHER CONDITIONS TO THE OFFER ARE
SET FORTH IN THE OFFER -- SECTION 10. IF MORE THAN 4,600,000 SHARES ARE PROPERLY
TENDERED BY THE EXPIRATION DATE (AS DEFINED HEREIN) AND NOT WITHDRAWN, THEN,
SUBJECT TO THE TERMS AND CONDITIONS OF THE OFFER, TENDERED SHARES WILL BE
ACCEPTED ON A PRO RATA BASIS (WITH APPROPRIATE ADJUSTMENTS TO AVOID PURCHASES OF
FRACTIONAL SHARES) ACCORDING TO THE NUMBER OF SHARES PROPERLY TENDERED BY EACH
STOCKHOLDER AT OR PRIOR TO THE EXPIRATION DATE AND NOT WITHDRAWN.
 
     According to the Company's Quarterly Report on Form 10-Q for the quarter
ended March 31, 1996 (the "March 10-Q"), filed with the Securities and Exchange
Commission (the "Commission"), there were 14,961,354 Shares outstanding as of
May 6, 1996. Orion and its subsidiaries own in the aggregate 7,409,942 Shares,
representing approximately 49.5% of the Shares outstanding at such date. The
4,600,000 Shares subject to the Offer represent approximately 30.7% of the
outstanding Shares and approximately 60.9% of the outstanding Shares not already
owned by Orion and its subsidiaries. The approximate number of holders of Shares
as of February 29, 1996 was 2,000, including both record and beneficial
shareholders.
<PAGE>   4
 
     Each of the Purchasers believes that increasing its beneficial ownership of
Shares represents a favorable investment opportunity, especially since a higher
percentage of ownership will allow Orion to become more involved in setting the
strategic direction of the Company and will, among other things, enable the
Purchasers to participate to a greater extent in any future growth of the
Company and any appreciation in value of the Shares. In addition, if all
4,600,000 Shares are properly tendered and purchased in accordance with the
terms of the Offer, Orion will be able to include the Company in the
consolidated federal income tax return of Orion as a member of Orion's
affiliated group. Section 1504(a)(2) of the Internal Revenue Code of 1986, as
amended (the "Code"), requires generally that 80% or more of both the total
voting power and the total value of the stock of a corporation (other than
certain preferred stock) be owned by one or more of the members of an affiliated
group in order for such corporation to be included in the consolidated federal
income tax return of such group. See SPECIAL FACTORS -- "Background of the
Transaction"; "Purpose and Structure of the Transaction; Plans for the Company
After the Offer" and "Certain Effects of the Transaction."
 
     If, upon consummation of the Offer, Orion and its subsidiaries together own
less than 80% of the outstanding Shares, Orion and/or one or more of its
subsidiaries may purchase additional Shares in order to acquire an 80% ownership
interest in the Company, subject to the availability of funds and other
investment opportunities. Such purchases may be made through open market or
privately negotiated purchases or another tender offer (which may be for less
than all the Shares), subject to market conditions, at prices which may be
greater or less than the Offer price for the Shares. There can be no assurance
that Orion and its subsidiaries will acquire such additional Shares or over what
period of time such additional Shares, if any, might be acquired.
 
     Once Orion and its subsidiaries have acquired 80% of the outstanding
Shares, Orion intends to purchase additional Shares, directly or indirectly
through its wholly-owned subsidiaries, from time to time in order to offset any
dilution caused by future issuances of securities by the Company whether as a
result of grants under employee benefit plans or otherwise.
 
     Following completion of the Offer, the Purchasers intend that the Company
will operate with its own management and that the Shares will continue to be
publicly traded. The Purchasers have no current intention to propose a merger or
other business combination with the Company. After completion of the Offer,
Orion and its subsidiaries will have effective control of the Company. See
SPECIAL FACTORS -- "Purpose and Structure of the Transaction; Plans for the
Company After the Offer" and THE OFFER -- Section 11.
 
     Information included in this Offer to Purchase about the Company, its
advisors and contacts of the Company with parties other than the Purchasers has
been taken from, or is based upon, publicly available documents on file with the
Commission and is qualified in its entirety by reference to such documents.
Certain of the executive officers and directors of Orion are also directors of
the Company, and certain non-public information concerning the Company has been
made available to those directors in their capacity as directors of the Company.
See SPECIAL FACTORS -- "Background of the Transaction" -- "Fairness of the
Offer" and -- "Interests of Certain Persons in the Transaction; Securities
Ownership; Related Transactions." Although the Purchasers do not have any
knowledge that would indicate that any statements contained herein which are
based on such public documents or on information concerning the Company
otherwise provided to Orion are untrue, the Purchasers cannot take
responsibility for the accuracy or completeness of such public documents or for
any failure by the Company to disclose events which may have occurred and which
have affected or may affect the significance or accuracy of any such
information.
 
     THIS OFFER TO PURCHASE AND THE ACCOMPANYING LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS MADE
WITH RESPECT TO THE OFFER.
 
                                        2
<PAGE>   5
 
                                SPECIAL FACTORS
 
BACKGROUND OF THE TRANSACTION
 
     Since August 1984, Orion has had, directly or through wholly-owned
subsidiaries, a substantial ownership interest in the Company. In November 1988,
Orion, through wholly-owned subsidiaries, increased its ownership of the Company
from 49.7% to 100%. On November 20, 1991, Orion sold 6,250,000 Shares of the
Company's common stock in an initial public offering at a net price per Share of
$13.60, reducing its ownership interest to 49.3% of the then outstanding Shares.
Since then, the Company has operated as an independent publicly-traded company.
 
     In connection with the 1991 public offering, Orion, certain of its
subsidiaries and the Company entered into a Shareholders Agreement. Such
Agreement was amended in 1994 to provide for an increase in the number of
directors, including directors independent of management and Orion, and was most
recently amended in March 1995 to provide for increasing the number of directors
to eleven. Pursuant to the Shareholders Agreement, as amended (the "Shareholders
Agreement"), Messrs. Alan R. Gruber, Chairman and Chief Executive Officer of
Orion, Larry D. Hollen, President and Chief Operating Officer of Orion, and
William J. Shepherd, a director of Orion, currently serve as Orion's designated
directors on the Company's Board. Mr. Gruber is Chairman of the Board of the
Company. Messrs. Gruber and Shepherd represent two of the four members of the
Company's Compensation Committee. Mr. Shepherd is the Chairman of both Orion's
Compensation Committee and the Company's Compensation Committee. For additional
information about the Shareholders Agreement, see SPECIAL FACTORS -- "Interests
of Certain Persons in the Transaction; Securities Ownership; Related
Transactions" and THE OFFER -- Section 11.
 
     Mr. Robert B. Sanborn, Mr. Hollen's predecessor as President and Chief
Operating Officer of Orion, who is a director of and a senior executive
consultant to Orion, is also a member of the Company's Board and of its
Compensation Committee. Mr. Sanborn receives the regular fees and other benefits
provided to all non-employee directors of the Company. Mr. Roger B. Ware, the
Company's President and Chief Executive Officer, serves as a member of Orion's
Board of Directors but is not a member of any of its committees. Mr. Ware
receives the regular fees and other benefits provided to all non-employee
directors of Orion.
 
     Orion and the Company are also parties to an investment management
agreement pursuant to which the investment portfolio of the Company (other than
short-term investments and a portion of the equity portfolio) is managed by
Orion under the direction and supervision of the Company and subject to the
Company's investment policies. In addition, Orion's insurance subsidiaries have
entered into certain reinsurance agreements in the ordinary course of business
with the Company's insurance subsidiaries. For additional information about
transactions between Orion and the Company, see SPECIAL FACTORS -- "Interests of
Certain Persons in the Transaction; Securities Ownership; Related Transactions."
 
     On July 18, 1995, the Company acquired all the capital stock of Viking
Insurance Holdings, Inc. ("Viking Holdings") for a total consideration of
$102,700,000 (subject to certain adjustments). The Company financed the
acquisition of Viking Holdings by selling 1,550,000 Shares in a European
offering pursuant to Regulation S under the Securities Act of 1933, as amended
(the "Securities Act"), and utilizing a portion of a new $110,000,000 credit
facility from a group of lending banks. Certain of Orion's wholly-owned
subsidiaries held $20,896,000 of the Company's subordinated promissory notes due
2003 (the "2003 Notes") which had been issued in November 1991. To facilitate
the Company's acquisition of Viking Holdings, the entire principal amount of the
2003 Notes was converted in July and October 1995 into 1,326,128 Shares at
$15.76 per Share, the same net price received by the Company in its Regulation S
offering. The conversion of the 2003 Notes restored Orion to its previous
ownership level in the Company of slightly less than 50% of the outstanding
Shares following the increase in the number of Shares resulting from the
Company's Regulation S offering. See SPECIAL FACTORS -- "Interests of Certain
Persons in the Transaction; Securities Ownership;
 
                                        3
<PAGE>   6
 
Related Transactions." Orion's subsidiaries received the following number of
Shares upon conversion of the 2003 Notes:
 
<TABLE>
<CAPTION>
                                                                                NUMBER OF
                                                                             SHARES RECEIVED
                                                                             ---------------
    <S>                                                                      <C>
    The Connecticut Indemnity Company......................................        74,462
    Connecticut Specialty Insurance Company................................        10,154
    Design Professionals Insurance Company.................................        47,448
    EBI Indemnity Company..................................................        47,046
    Employee Benefits Insurance Company....................................        67,212
    The Fire and Casualty Insurance Company of Connecticut.................        27,416
    Security Insurance Company of Hartford.................................       855,721
    Security Reinsurance Company...........................................       128,955
    SecurityRe, Inc........................................................        67,714
                                                                                ---------
              Total........................................................     1,326,128
                                                                                =========
</TABLE>
 
     From November 1995 through March 1996, Design Professionals Insurance
Company ("DPIC") acquired an additional 80,000 Shares in open market purchases.
Except as set forth below or elsewhere herein, there have been no transactions
or negotiations between or among Orion, the Company and their affiliates and
third parties in the last three fiscal years regarding a merger, consolidation,
asset acquisition, tender offer, sale of assets, election of directors, or
acquisition of securities.
 
     In December 1995, a representative of a company in the insurance industry
expressed an interest to Mr. Gruber in acquiring from Orion its Shares in
connection with a possible acquisition of the Company. In a subsequent
conversation in February 1996, the representative of such company indicated that
its management had decided to pursue another possible acquisition. No further
contact has been made by the interested party and no price for securities of the
Company was discussed.
 
     Also in February 1996, Mr. Gruber discussed with a representative of
another insurance company a possible acquisition from Orion of its Shares. Such
company decided to pursue other opportunities. No price was discussed for the
Shares, and no offer was made.
 
     In March 1996, a representative of a financial intermediary told Mr. Gruber
that he had proposed to a named third-party entity the possible purchase from
Orion of its Shares in connection with a possible purchase of the Company. The
financial intermediary was not retained by Orion to effect such a transaction
and Orion has no information to the effect that he has been retained to do so by
the third party. Orion has had no further contact concerning the proposal, has
received no offer and is not engaged in negotiations concerning the proposal.
 
     Messrs. Ware and Gruber have discussed from time to time increasing Orion's
ownership interest in the Company. At the April 2, 1996 Board of Directors
meeting of the Company, Mr. Ware asked Mr. Gruber to indicate Orion's present
plans, if any, with respect to increasing its ownership interest in the Company.
Mr. Gruber indicated that no plans, proposals or any intention had been arrived
at by Orion or its subsidiaries which hold Shares, but that each reserved the
right to develop plans to acquire additional Shares, including through
open-market purchases or a tender offer which could be for all or a part of the
Shares. Mr. Ware expressed his preference for Orion's acquiring all of the
equity of the Company.
 
     On May 7, 1996, at special meetings, the Board of Directors of each
Purchaser authorized the making of the Offer. At the meeting of the Board of
Directors of Orion, Mr. Ware participated but abstained from voting. The Company
was advised that the Offer would be commenced on May 8, 1996. A press release
was issued by Orion on May 7, 1996.
 
FAIRNESS OF THE OFFER
 
     The Offer price of $17.50 per Share was determined by Orion, with the other
Purchasers, after considering the factors set forth below and without
negotiations with the Company.
 
                                        4
<PAGE>   7
 
     The Purchasers believe that the Offer is fair to the unaffiliated holders
of Shares to whom it is directed. In concluding that the Offer is fair to such
stockholders, the Purchasers have considered, among other matters, (i) that the
$17.50 per Share price represents a premium of $1.375 over the closing sale
price of $16.125 per Share as reported by the New York Stock Exchange (the
"NYSE") on May 7, 1996, the date prior to the commencement of the Offer; (ii)
that the $17.50 per Share price represents an increase of $3.12 over the net
book value per Share of $14.38 as of March 31, 1996 and an increase of $5.33
over the tangible book value per Share of $12.17 as of the same date (the
Purchasers have made no analysis of the liquidation value of the Company and
therefore have no basis for expressing an opinion as to the comparison of the
Offer price to liquidation value); (iii) recent, and historical, market prices
of the Shares since the Company became a public company in November 1991,
including the average daily closing stock price for the six-month period ended
April 30, 1996 of $14.695; (iv) Orion's evaluation of competitive trends and
other conditions in the markets in which the Company operates; (v) Orion's
knowledge of the business, historical results of operations and the properties,
assets and earnings of the Company and its recent financial and operating
performance (see THE OFFER -- Section 7); (vi) the per Share price of $16.50
($15.76 net of expenses) received by the Company from the sale of 1,550,000
Shares in June 1995 in the Regulation S offering; (vii) the conversion price of
$15.76 per Share for an aggregate of 1,326,128 Shares issued in June and October
of 1995 for the conversion of $20,896,000 of the 2003 Notes of the Company which
were held by subsidiaries of Orion; (viii) the average per Share price of
approximately $14.45 paid by the Company both to subsidiaries of Orion and to
unaffiliated holders in 1994 for the repurchase of 459,200 Shares pursuant to
the repurchase program authorized by the Company's Board of Directors in 1994
(see THE OFFER -- Section 9); (ix) the per Share prices paid by DPIC ranging
from $13.375 to $14.00 to acquire 80,000 Shares in the open market between
November 1995 and March 1996; and (x) the fact that the Purchasers already
beneficially own 49.5% of the outstanding Shares.
 
     The foregoing discussion of the information and factors considered by the
Purchasers is not intended to be exhaustive. In view of the wide variety of
factors considered in connection with their determination of the Offer price and
their evaluation of the fairness of the Offer, the Purchasers did not find it
practicable to, and did not, quantify or otherwise attempt to assign relative
weights to the foregoing factors or determine that any factor was of particular
importance. Rather, the Purchasers viewed their position as being based on the
totality of the information presented to and considered by them. On balance,
however, the Purchasers viewed the factors set forth in items (i) through (v)
and (x) as very favorable to their decision, the matters set forth in items (vi)
and (ix) as being influential, and the remainder of lesser significance. In
particular, the Purchasers consider that the Offer price of $17.50 per Share
represents a premium over the price at which the Shares were trading immediately
prior to the date of commencement of the Offer.
 
     The Purchasers also have taken into account that the liquidity and market
value of the remaining Shares held by the public could be adversely affected by
the reduction in the number of stockholders, reduction in the number of Shares
held by unaffiliated stockholders, the possible delisting of the Shares by the
NYSE and the possible deregistration of the Shares under the Securities Exchange
Act of 1934, as amended (the "Exchange Act"). The Purchasers have further taken
into account their intent and present expectation that the Shares will remain
publicly traded. See SPECIAL FACTORS -- "Certain Effects of the Transaction" and
THE OFFER -- Section 6.
 
     In advance of a meeting of the Board of Directors of the Company in
December 1995, the Company provided its 1996 operating plan to the members of
its Board of Directors, including Messrs. Gruber, Hollen, Sanborn and Shepherd
(all of whom are members of the Board of Directors of Orion of which Mr. Gruber
is Chairman of the Board, Messrs. Gruber and Hollen are executive officers and
Mr. Sanborn is a senior executive consultant) (see INTRODUCTION and SPECIAL
FACTORS -- "Interests of Certain Persons in the Transaction; Securities
Ownership; Related Transactions"). Such operating plan was prepared by the
Company's management based on numerous assumptions concerning mix of business,
changes in insurance premium rates, growth, renewal rates, claim frequencies and
severity, commission ratios, premium taxes, expenses, realized gains,
shareholder dividends and other factors. The 1996 operating plan includes
premiums earned of $486,481,000; operating earnings (earnings after taxes,
excluding realized investment gains and losses) of $22,401,000 or $1.50 per
Share; and net income (including assumed realized investment gains) of
 
                                        5
<PAGE>   8
 
$24,351,000 or $1.63 per Share. In 1995 the Company had premiums earned of
$390,017,000, operating earnings of $6,790,000 or $.51 per Share, and net income
of $8,929,000 or $.67 per Share. For the first quarter of 1996 and 1995,
respectively, the Company's earned premiums were $115,470,000 and $79,468,000;
operating earnings were $4,499,000, or $.30 per Share, and $5,398,000, or $.45
per Share; and net income was $5,787,000, or $.39 per Share, and $5,768,000, or
$.48 per Share.
 
     Orion believes that the 1996 operating plan is based on a variety of
assumptions which, though considered reasonable by the Company's management for
purposes of establishing an operating business plan, are subject to substantial
uncertainties and contingencies, many of which are beyond the Company's control.
The 1996 operating plan was not prepared with a view to public dissemination or
compliance with published guidelines of the Commission or of the American
Institute of Certified Public Accountants. The information cited therefrom is
included herein solely because it was known to the executive officers and
directors of Orion during the period when it was considering whether to proceed
with the Offer. None of the Purchasers assumes any responsibility for the
accuracy of the 1996 operating plan. For historical financial information
concerning the Company, see THE OFFER -- Section 7.
 
     The Purchasers have not obtained, or sought to obtain, any report, opinion
or appraisal from an outside party, including, without limitation, an investment
banker's opinion as to the fairness of the Offer to unaffiliated holders of
Shares. The Purchasers have not negotiated the Offer price with the Company and
do not intend to do so.
 
PURPOSE AND STRUCTURE OF THE TRANSACTION; PLANS FOR THE COMPANY AFTER THE OFFER
 
     Orion, through its subsidiaries, beneficially owns approximately 49.5% of
the Shares outstanding as of May 6, 1996. A principal purpose of the Offer, in
addition to its being a favorable investment opportunity, is to achieve a
sufficient ownership interest in the Company to permit Orion to file
consolidated federal income tax returns that include the Company. Section
1504(a)(2) of the Code requires generally that 80% or more of both the total
voting power and the total value of the stock of a corporation (other than
certain preferred stock) be owned by one or more of the members of an
"affiliated group" in order for such corporation to be included within such
group and thereby join in the filing of consolidated federal income tax returns
of such group. See INTRODUCTION and SPECIAL FACTORS -- "Certain Effects of the
Transaction" with respect to the federal income tax sharing agreement that Orion
intends to seek to enter into with the Company in such event.
 
     As described under THE OFFER -- Section 2, if fewer than 4,600,000 Shares
are properly tendered and purchased pursuant to the Offer, and Orion together
with the other entities in its consolidated tax group then owns less than 80% of
the outstanding Shares, Orion intends, subject to market conditions, that it
and/or its wholly-owned subsidiaries will purchase additional Shares in order to
acquire an 80% ownership interest in the Company. Such purchases may be made
through open market or privately negotiated purchases or another tender offer
(which may be for less than all the Shares), at prices acceptable to Orion and
its subsidiaries, which may be greater or lesser than the Offer price for the
Shares. There can be no assurance that such purchases of Shares will be made or
over what period of time such Shares, if any, might be purchased.
 
     After completion or termination of the Offer, regardless of the number of
Shares purchased in the Offer, Orion also reserves the right to purchase
directly or through its subsidiaries additional Shares in the open market, in
privately negotiated transactions, in another tender or exchange offer or
otherwise. Any acquisition of Shares by Orion, or its subsidiaries, would have
to be made in accordance with applicable legal requirements, including those
under the Exchange Act. After completion or termination of the Offer, Orion also
reserves the right, but has no present intention, (i) to sell Shares in open
market or negotiated transactions, (ii) to propose a merger or other similar
business combination of the Company involving consideration consisting of cash
or securities or a combination of cash and securities or (iii) to propose such a
transaction involving consideration having a value more or less than the amount
to be paid per Share pursuant to the Offer. See THE OFFER -- Section 11.
 
     It is the present intention of the Purchasers, following the consummation
of the Offer, that the Company operate with its own management and that its
Shares will continue to be publicly traded. However, upon the completion of the
Offer, Orion reserves the right to conduct a further review of the Company and
its assets,
 
                                        6
<PAGE>   9
 
corporate structure, dividend policy, capitalization, operations, properties,
policies, management and personnel and to consider what, if any, changes would
be desirable in light of the circumstances which then exist, subject to
applicable legal requirements. Such changes could include, in addition to those
described under SPECIAL FACTORS -- "Purpose and Structure of the Transaction;
Plans for the Company After the Offer" and -- "Certain Effects of the
Transaction", changes in the Company's or any subsidiary's business, corporate
structure, articles of incorporation, by-laws, capitalization, board of
directors, management or dividend policy. The Purchasers expect that the Company
will continue to have a number of directors who are independent of management of
the Company, consistent with applicable law and the requirements of the NYSE and
other regulatory bodies.
 
     For additional information concerning legal or contractual requirements
applicable to the Purchasers' plans, see THE OFFER -- Section 11. In addition,
while Orion does not intend or presently anticipate that the acquisition of up
to 4,600,000 Shares in the Offer, if the Offer is consummated, would result in
the delisting of the Shares which currently trade on the NYSE or in
deregistration of the Shares under Section 12 of the Exchange Act, there can be
no assurance that this will not occur. See SPECIAL FACTORS -- "Certain Effects
of the Transaction" and THE OFFER -- Section 6.
 
     Except as set forth above in this Offer to Purchase, none of the Purchasers
has any present plans or proposals which relate to or would result in (i) an
extraordinary corporate transaction, such as a merger, reorganization or
liquidation of the Company or any of its subsidiaries, (ii) a sale or transfer
of a material amount of assets of the Company or any of its subsidiaries; (iii)
any material changes in the Company's corporate structure, business or
composition of its management or personnel; (iv) any material change in the
present capitalization, dividend rate or policy or indebtedness of the Company;
(v) any change in the present board of directors of the Company, including, but
not limited to, any plan or proposal to change the number or term of existing
directors, to fill any existing vacancy on the board or to change any term of
the employment contract of any executive officer; (vi) a class of equity
securities of the Company being delisted from a national securities exchange or
ceasing to be authorized to be quoted on an inter-dealer quotation system of a
registered national securities association or becoming eligible for termination
of registration pursuant to Section 12(g)(4) of the Exchange Act or the
suspension of the Company's obligation to file reports pursuant to Section 15(d)
of the Exchange Act.
 
CERTAIN EFFECTS OF THE TRANSACTION
 
     Certain of the effects of the transactions contemplated by the Offer are
described in this Offer to Purchase under SPECIAL FACTORS -- "Purpose and
Structure of the Transaction; Plans for the Company After the Offer" and THE
OFFER -- Section 6.
 
     The Purchasers believe that the Offer presents a favorable opportunity to
stockholders of the Company not affiliated with Orion to sell at least a portion
of their Shares (subject to proration) and to continue to hold Shares and
participate in the on-going business of the Company. See SPECIAL
FACTORS -- "Purpose and Structure of the Transaction; Plans for the Company
After the Offer." The Purchasers have also considered that if the Offer is
consummated, stockholders who tender Shares will forego the opportunity to
participate in any future growth prospects of the Company in respect of the
Shares sold by them.
 
     In the event that the Offer is consummated, the interest of Orion and its
wholly-owned subsidiaries in the net book value and net earnings of the Company,
in terms of both percentages and dollar amounts, will increase in direct
proportion to the increase in the percentage of outstanding Shares owned by them
resulting from the Share acquisitions pursuant to the Offer. If all of the
4,600,000 Shares are purchased pursuant to the Offer, Orion's beneficial
interest in the net book value at March 31, 1996 and net earnings of the Company
for the three months ended March 31, 1996 as reflected in the March 10-Q would
increase to 80.3%, or $172,773,000, and $4,647,000, respectively, assuming no
exercise of outstanding stock options.
 
     The liquidity of the Shares is expected to be reduced after consummation of
the Offer. The Purchasers do not believe that liquidity will be materially
adversely affected other than possibly for holders of large blocks of Shares.
Although the Purchasers do not intend and presently do not expect that this will
occur, the Purchasers cannot assure that the Shares may not be delisted from the
NYSE and the registration of the Shares under the
 
                                        7
<PAGE>   10
 
Exchange Act terminated if the Purchasers purchase 4,600,000 Shares pursuant to
the Offer. Deregistration under the Exchange Act, should it occur, would make
certain provisions of the Exchange Act, such as the short-swing profit recovery
provisions of Section 16(b), and the requirement of furnishing a proxy statement
in connection with stockholders meetings, no longer applicable. In such event,
the Company would also no longer be required to file periodic reports with the
Commission. In such circumstances, the Shares may no longer be "margin
securities." See THE OFFER -- Section 6. Except as otherwise described in this
Offer to Purchase, upon consummation of the Offer, the Purchasers currently
expect the business and operations of the Company to be continued substantially
as they are currently being conducted.
 
     In the event the Offer is consummated and Orion, together with its
subsidiaries, owns 80% or more of the outstanding Shares, Orion intends to seek
to enter into a federal income tax sharing agreement with the Company and the
Company's subsidiaries. Such agreements typically provide for the filing of
consolidated federal income tax returns and would require the Company and its
subsidiaries to make payments to Orion in amounts equal to their tax liabilities
computed on a separate basis. If the Company and its subsidiaries generate
losses or credits which actually reduce Orion's consolidated tax liability or
which would have resulted in a refund on a separate company basis during the
period the Company and its subsidiaries are members of the affiliated group,
such an agreement would generally require Orion to pay to the Company and its
subsidiaries the amount of such reduction or refund. Such agreements would
typically address the timing of such payments, the resolution of tax disputes
and other similar matters.
 
     For a discussion of certain federal income tax consequences of the Offer
and the transactions contemplated as set forth in this Offer to Purchase, see
also SPECIAL FACTORS -- "Certain Federal Income Tax Consequences."
 
INTERESTS OF CERTAIN PERSONS IN THE TRANSACTION; SECURITIES OWNERSHIP; RELATED
TRANSACTIONS
 
     Directors and Officers.  As described in this Offer to Purchase under
SPECIAL FACTORS -- "Background of the Transaction" and -- "Purpose and Structure
of the Transaction; Plans for the Company After the Offer", three of the
Company's directors are designated by Orion pursuant to the Shareholders
Agreement, including Mr. Gruber, who is Chairman of the Board of the Company and
also of Orion. The Shareholders Agreement also provides that so long as Orion or
its subsidiaries beneficially own in the aggregate 30% or more of the voting
securities of the Company, Orion will continue to have the right to designate
three nominees to the Company's Board (one of whom will be the Chairman of the
Board), and so long as Orion or its subsidiaries beneficially own 20% or more of
the Company's securities, Orion will have the right to designate two nominees.
Orion may also require that the Company's Compensation Committee include Orion's
nominees to the Company's Board. None of Orion's nominees, other than Mr.
Shepherd, receives any compensation from the Company, including any retainer fee
or attendance fee, for his services, except for travel expenses in connection
with attendance at directors' meetings. For information concerning the directors
and executive officers of the Purchasers, see Schedule I to this Offer to
Purchase.
 
                                        8
<PAGE>   11
 
     Securities Ownership.  Orion, through its subsidiaries, owns, in the
aggregate, 7,409,942 Shares. Set forth below is the number of Shares held by the
Purchasers respectively as of the date of this Offer to Purchase:
 
<TABLE>
<CAPTION>
                                                                         NO. OF
                                PURCHASER                                SHARES        %*
    ------------------------------------------------------------------  ---------     ----
    <S>                                                                 <C>           <C>
    The Connecticut Indemnity Company.................................    407,795      2.7
    Connecticut Specialty Insurance Company...........................    110,154      0.7
    Design Professionals Insurance Company............................    167,115      1.1
    EBI Indemnity Company.............................................    505,379      3.4
    Employee Benefits Insurance Company...............................    493,612      3.3
    The Fire and Casualty Insurance Company of Connecticut............    197,416      1.3
    Security Insurance Company of Hartford............................  4,921,802     32.9
</TABLE>
 
- ---------------
* Based on the number of Shares reported by the Company in the March 10-Q to be
  outstanding as of May 6, 1996.
 
     In addition, two other wholly-owned subsidiaries of Orion own Shares as
follows: SecurityRe, Inc. owns 67,714 Shares or 0.5% of the Shares outstanding
and Security Reinsurance Company owns 538,955 Shares or 3.6% of the Shares
outstanding as of such date.
 
     Although each of Orion's subsidiaries has sole power to vote and dispose of
its Shares and makes its own investment decisions, Orion is deemed by its direct
or indirect voting control of the subsidiaries to be able ultimately to direct
the acquisition, voting and disposition of the Shares held by its subsidiaries.
 
     As indicated elsewhere herein, DPIC purchased a total of 80,000 Shares in
the open market from November 1995 through March 1996 at prices ranging from
$13.375 to $14.00 for an average price per Share of $13.70. Of the 80,000
Shares, 13,500 Shares were purchased during the 60 days prior to the date of
this Offer to Purchase on the dates and at the prices set forth below:
 
<TABLE>
<CAPTION>
                                                                        PRICE
                                                                      PER SHARE
                                                        NO. OF         (NET OF
                          NAME                          SHARES       COMMISSIONS)      DATE
    <S>                                                <C>           <C>              <C>
    Design Professionals Insurance Company...........     1,900        $  13.50       3/11/96
                                                         10,000          13.625       3/12/96
                                                          1,600           13.50       3/12/96
</TABLE>
 
     The conversion in 1995 of the 2003 Notes of the Company is discussed under
SPECIAL FACTORS -- "Background of the Transaction" above.
 
     In other transactions, pursuant to the Company's 1994 repurchase program
(referred to under SPECIAL FACTORS -- "Fairness of the Offer" above and THE
OFFER -- Section 9), in 1994 the Purchasers sold an aggregate of 139,600 Shares
to the Company at an average price per Share of $14.62. Such aggregate number of
Shares sold by Orion's subsidiaries represented approximately 1.1% of the Shares
outstanding immediately prior to the adoption by the Company of its share
repurchase program.
 
     No executive officer or director of Orion or of any of the other
Purchasers, or to the knowledge of Orion, any associate of the persons named on
Schedule I hereto beneficially owns, or has the right to acquire, directly or
indirectly, any Shares except as follows:
 
                                        9
<PAGE>   12
 
<TABLE>
<CAPTION>
                                      NAME                                    NO. OF SHARES
    <S>                                                                       <C>
    W. Marston Becker.......................................................       1,400
    Bertram J. Cohn.........................................................     103,600*
    Robert B. Sanborn.......................................................       1,000
    Raymond J. Schuyler.....................................................         500
    William J. Shepherd.....................................................       5,000
    John R. Thorne..........................................................       1,500
    Roger B. Ware...........................................................      74,321**
</TABLE>
 
- ---------------
*  Mr. Cohn, as a managing director of First Manhattan Company, acts as
   co-manager in conjunction with another co-manager of each of two
   discretionary accounts which hold an aggregate of 103,600 Shares.
 
** As reported in the Company's Proxy Statement dated March 28, 1996 for its
   Annual Meeting of Stockholders. The number includes Shares beneficially owned
   as well as non-vested restricted stock and exercisable options.
 
     No executive officer or director has effected any transaction in the Shares
during the past 60 days except that Mr. Robert H. Jeffrey sold 1,300 Shares on
March 11, 1996 at a price of $13.50 per Share. For information concerning the
business address of the foregoing persons, see THE OFFER -- Section 8 and
Schedule I.
 
     None of Orion's wholly-owned subsidiaries will tender Shares in the Offer.
Orion has been advised that each of Messrs. Becker, Cohn, Schuyler, Shepherd and
Thorne intends to tender his Shares but that Mr. Sanborn does not intend to
tender his Shares. At present Orion has no information as to whether Mr. Ware
intends to tender any Shares. None of the Purchasers nor any of their directors
or executive officers, in his capacity as such, makes any recommendation to the
stockholders of the Company regarding the Offer.
 
     According to the Company's Proxy Statement dated March 28, 1996 for its
Annual Meeting of Stockholders to be held May 15, 1996 (the "Annual Meeting
Proxy Statement"), the only holder of 5% or more of the Shares, other than Orion
through its subsidiaries, is Sanford C. Bernstein & Co., Inc., One State Street
Plaza, New York, New York 10004, which owned, as reported in its Schedule 13G
filed with the Commission on February 7, 1996, 779,200 Shares or 5.21% of the
Shares issued and outstanding as of that date. Based on information set forth in
the Annual Meeting Proxy Statement, the directors and executive officers of the
Company as of January 31, 1996 beneficially owned (including Shares outstanding,
Shares subject to options exercisable within 60 days of January 31, 1996 and
restricted Shares) an aggregate 219,122 Shares, of which 1,000 Shares were owned
by Robert B. Sanborn, 5,000 Shares were owned by William J. Shepherd, 74,321
Shares were owned by Roger B. Ware, 400 Shares by Dennis J. Lacey, 39,482 Shares
by Arthur J. Mastera, 506 Shares by M. Ann Padilla, 41,236 Shares by Michael L.
Pautler, 12,000 Shares by James R. Pouliot, 500 Shares by Carroll D. Speckman,
25,216 Shares by Fred T. Roberts and 1,500 Shares by Richard R. Thomas.
 
     According to the Annual Meeting Proxy Statement, the Company adopted a Long
Term Incentive Plan in 1991 for all of its employees under which, as of December
31, 1995, the number of Shares underlying outstanding unexercised options held
by the named executive officers of the Company was as follows:
 
<TABLE>
<CAPTION>
                                                                        NUMBER OF
                                                                   UNEXERCISED OPTIONS
                                                                       AT YEAR-END
                                                              -----------------------------
                                NAME                          EXERCISABLE     UNEXERCISABLE
        <S>                                                   <C>             <C>
        Roger B. Ware.......................................     45,250           15,750
        Fred T. Roberts.....................................     22,250           10,750
        Arthur J. Mastera...................................     20,250           10,750
        Michael L. Pautler..................................     23,250           10,750
        James R. Pouliot....................................         --           35,000
</TABLE>
 
                                       10
<PAGE>   13
 
     Except as set forth herein, to the Purchasers' knowledge, no member the
Company's management or Board of Directors has interests in the Offer which are
not identical to those of other holders of the Shares.
 
     Related Transactions.  As indicated elsewhere herein, Orion and its
subsidiaries have entered into several agreements with the Company and its
subsidiaries. Pursuant to the Shareholders Agreement, Messrs. Gruber, Hollen and
Shepherd serve on the Company's Board of Directors. Under the Shareholders
Agreement, Orion also has the right on up to three occasions to require the
Company to register under the Securities Act Shares owned by Orion and its
wholly-owned subsidiaries, which right expires in November 1997. In addition,
the Company has agreed to use its best efforts to include such Shares in any
underwritten public offering of its Shares under the Securities Act and to pay
all expenses in connection with the first two registrations.
 
     Most state insurance codes require transactions between a licensed
insurance company and its affiliates to be fair and reasonable. In the case of
certain material transactions, an insurance company must obtain prior approval
of the transaction from the appropriate state insurance department. Reinsurance
agreements, tax sharing agreements, loans, guarantees, sales and other
transactions of a material size, as well as management, service and cost sharing
agreements must similarly be approved.
 
     In the ordinary course of business, the Company's insurance subsidiaries
reinsure certain risks with other companies. Such arrangements serve to limit
their maximum loss on large risks. To the extent that any reinsuring company is
unable to meet its obligations, the Company's insurance subsidiaries would not
be relieved of their liabilities. For 1995, Guaranty National Insurance Company
("GNIC") and Landmark American Insurance Company ("LAIC"), wholly-owned
subsidiaries of the Company, were parties to a 100% reinsurance agreement with
an Orion insurance subsidiary. Premiums written and ceded under this agreement
are included in premiums written as reported in the Company's financial
statements and were $152,000 for 1995. Insurance subsidiaries of the Company
were paid $5,000 in fees in conjunction with this reinsurance agreement. Also,
during 1995 GNIC was a party to reinsurance agreements with Orion insurance
subsidiaries pursuant to which GNIC assumed business written through affiliates
totalling $9,495,000 in premiums. GNIC paid to the Orion insurance subsidiaries
$160,000 in fees and reimbursed $178,000 of actual expenses incurred by Orion's
insurance subsidiaries in conjunction with this reinsurance agreement. For 1994,
GNIC and LAIC were parties to a 100% reinsurance agreement with an Orion
insurance subsidiary. Premiums written and ceded under this agreement are
included in premiums written as reported in the Company's financial statements
and were $643,000 for 1994. The Company's insurance subsidiaries were paid
$14,000 in fees and reimbursed $1,000 for expenses in conjunction with this
reinsurance agreement. Also, during 1994 GNIC was a party to reinsurance
agreements with Orion insurance subsidiaries pursuant to which GNIC assumed
business written through affiliates totalling $30,921,000 in premium. GNIC paid
to Orion's insurance subsidiaries $666,000 in fees and reimbursed $774,000 of
actual expenses incurred by Orion's insurance subsidiaries in conjunction with
this reinsurance agreement. For 1993 GNIC and LAIC were parties to a 100%
reinsurance agreement with an Orion insurance subsidiary. Premiums written and
ceded under this agreement are included in premiums written as reported in the
Company's financial statements and were $847,000 for 1993. The Company's
insurance subsidiaries were paid $15,000 in fees and reimbursed $1,000 for
expenses in conjunction with this reinsurance agreement. Also, during 1993 GNIC
and LAIC were parties to reinsurance agreements with Orion insurance
subsidiaries pursuant to which GNIC assumed business written through affiliates
totalling $30,856,000 in premiums. The Company's insurance subsidiaries paid to
Orion's insurance subsidiaries $582,000 in fees and reimbursed $673,000 for
actual expenses in conjunction with this reinsurance agreement.
 
     Effective January 1, 1993, the Company's insurance subsidiaries entered
into a reinsurance agreement ("1993 Agreement") with National Reinsurance
Corporation ("NRC"), a wholly-owned subsidiary of National Re Holdings
Corporation ("National Re"). The 1993 Agreement, as amended, primarily provides
reinsurance limits up to $6,000,000 in excess of the Company's retention of
$150,000 to $300,000. The Company ceded $38,215,000 in premiums to NRC during
1995 and received $12,358,000 in ceding commissions. Subject to certain renewal
and cancellation provisions, the agreement expires at the end of 1998. With the
exception of 1992, NRC has been a principal reinsurer of the Company since 1985.
Mr. Steven B. Gruber, a son of Mr. Alan R. Gruber, Chairman of the Company and
of Orion, has been a director of National
 
                                       11
<PAGE>   14
 
Re since 1990. Neither of the Messrs. Gruber participated in the negotiation of
the 1993 Agreement and its subsequent amendments. The 1993 Agreement, as amended
in 1994, provided reinsurance limits up to $9,700,000 in excess of the Company's
retention of $300,000. The Company ceded $31,929,000 in premiums to NRC during
1994 and received $10,377,000 in ceding commissions. The Company ceded
$27,722,000 in premiums during 1993 to NRC and received $9,010,000 in ceding
commissions.
 
     A subsidiary of Orion is an agent for the Company, pursuant to the
Company's standard agency contract. During 1995, this agency produced $411,000
in premiums and was paid $72,000 in commissions. The Company expects similar
premium production and commissions in 1996. During 1994, this agency produced
$516,000 in premiums and was paid $90,000 in commissions. During 1993, this
agency produced $537,000 in premiums and was paid $94,000 in commissions.
 
     During 1995, the Company's 2003 Notes in the principal amount of
$20,896,000, were converted by Orion's subsidiaries into 1,326,128 Shares. Total
interest paid by the Company on the 2003 Notes in 1995 to Orion's subsidiaries
was $1,122,000. Total interest paid to Orion's subsidiaries for 1993 was
$1,928,000 and for 1994 was $1,640,000. See SPECIAL FACTORS -- Background of the
Transaction.
 
     In 1995, in connection with the Viking Holdings acquisition financing,
Orion made a commitment for a $21,000,000 bridge loan to the Company. The loan
was not drawn down, but the Company paid a $210,000 commitment fee to Orion at
the time the commitment was executed.
 
     The Company and Orion have entered into an investment management agreement
pursuant to which the investment portfolio of the Company (other than short-term
investments and a portion of the equity securities) is managed by investment
managers of Orion under the direction and supervision of the Company and subject
to the Company's investment policies. For its investment management services,
fees were paid to Orion at a rate of $550,000 per year from 1993 through July
1995, at which time they were increased to a rate of $650,000 per year in
recognition of the additional investment balances resulting from the Viking
Holdings acquisition. The contract continues in effect for annual periods unless
terminated by either party upon 90 days prior written notice.
 
     During 1990, GNIC entered into a loan participation agreement pursuant to
which DPIC borrowed approximately $9 million from affiliates. The loan, which
was secured by a leasehold deed of trust on an office building in Monterey,
California owned and primarily occupied by DPIC, matured in November 1995.
GNIC's proportionate share of this loan was $3,700,000 or 41.1%. GNIC received
quarterly interest payments at a rate of 11% per year. Interest earned for each
of 1993 and 1994 was $407,000 and for 1995 was $355,000.
 
     Orion has committed to invest up to $5,000,000 in Insurance Partners, L.P.,
a partnership formed to make equity investments of up to approximately $550
million in the insurance industry. The Company has committed to participate in
Orion's commitment in an aggregate amount not to exceed $1,500,000. As of
December 31, 1995, Orion had invested $510,000 and the Company $219,000 in such
partnership investments. Insurance Partners L.P. is managed by Insurance
Partners Advisors L.P., of which Mr. Steven B. Gruber is a managing director.
 
     As described under SPECIAL FACTORS -- "Certain Effects of the Transaction,"
Orion may enter into a tax sharing agreement with the Company and its
subsidiaries. See also, SPECIAL FACTORS -- "Background of the Transaction."
 
DISSENTERS' RIGHTS
 
     No dissenters' rights under the Colorado Corporation Code are available to
stockholders of the Company with respect to the Offer. See THE OFFER -- Section
11.
 
CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
     The receipt of cash for Shares pursuant to the Offer will be a taxable
transaction for federal income tax purposes and may also be a taxable
transaction under applicable state, local or foreign tax laws. The tax
consequences of such receipt pursuant to the Offer may vary depending upon,
among other things, the
 
                                       12
<PAGE>   15
 
particular circumstances of the stockholder. In general, a stockholder who
receives cash for Shares pursuant to the Offer will recognize gain or loss for
federal income tax purposes equal to the difference between the amount of cash
received for the Shares sold and his adjusted tax basis in such Shares. Such
gain or loss will be capital gain or loss if the stockholder held Shares as a
capital asset, and will be long-term capital gain or loss if the stockholder
held the Shares for more than one year at the time of sale. Gain or loss will be
calculated separately for each block of Shares tendered pursuant to the Offer.
 
     The foregoing discussion may not be applicable to stockholders who are not
citizens or residents of the United States or to certain foreign corporations,
to stockholders who acquired their Shares pursuant to the exercise of employee
stock options or otherwise as compensation, or to other categories of
stockholders subject to special treatment under federal income tax laws.
 
     THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY AND IS BASED ON PRESENT LAW. BECAUSE OF THE INDIVIDUAL NATURE
OF TAX CONSEQUENCES, EACH STOCKHOLDER IS URGED TO CONSULT HIS TAX ADVISOR WITH
RESPECT TO THE TAX CONSEQUENCES TO HIM OF THE OFFER, INCLUDING THE APPLICATION
AND EFFECT OF THE ALTERNATIVE MINIMUM TAX, AND STATE, LOCAL AND FOREIGN TAX
LAWS.
 
SOURCE AND AMOUNT OF FUNDS -- FINANCING OF THE OFFER
 
     The total amount of funds required to purchase all 4,600,000 Shares
pursuant to the Offer and to pay related fees and expenses is expected to be
approximately $81,250,000. The Purchasers have available cash and short-term
investments of approximately $186,516,000 as of March 31, 1996. For information
as to the respective purchase obligations of the Purchasers, see the
Introduction in this Offer to Purchase and THE OFFER -- Sections 1, 3 and 11.
The Purchasers reserve the right to amend the Offer to reduce the number of
Shares which will be purchased pursuant to the Offer, including as a result of
the Insurance Regulatory Condition. See THE OFFER -- Section 10.
 
                                   THE OFFER
 
     1.  TERMS OF THE OFFER; EXPIRATION DATE.  Upon the terms and subject to the
conditions of the Offer, the Purchasers will accept for payment (and thereby
purchase) and pay for, at the time and in the manner set forth in The
Offer -- Section 2, up to 4,600,000 Shares validly tendered prior to the
Expiration Date (as hereinafter defined) and not withdrawn in accordance with
The Offer -- Section 4 at an Offer price of $17.50 per Share net to the seller
in cash without interest thereon. The obligation of any Purchaser to purchase
Shares in the Offer is several and not joint. Each Purchaser reserves the right
to purchase any Shares not purchased by the other Purchasers. The term
"Expiration Date" means 12:00 Midnight, New York City time, on June 5, 1996,
unless and until Orion shall have extended the period of time for which the
Offer is open, in which event the term "Expiration Date" shall mean the latest
time and date on which the Offer, as so extended by Orion, shall expire.
 
     Orion on behalf of the Purchasers expressly reserves the right, in its sole
discretion, for any reason, at any time or from time to time, and regardless of
whether or not any of the events set forth in THE OFFER -- Section 10 shall have
occurred or shall have been determined by Orion to have occurred, to extend the
period of time during which the Offer is open by giving oral or written notice
of such extension to the Depositary and by making a public announcement thereof.
During any such extension, all Shares previously tendered may be withdrawn as
set forth in The Offer -- Section 4. There can be no assurance that Orion will
exercise its right to extend the Offer. Subject to applicable rules of the
Commission, the Purchasers expressly reserve the right, in their sole
discretion, at any time or from time to time, and regardless of whether or not
any of the events in THE OFFER -- Section 10 shall have occurred or shall have
been determined by Orion to have occurred, to increase or decrease the price per
Share payable in the Offer or to make any other changes in the terms and
conditions of the Offer by giving written or oral notice of such amendment to
the Depositary (which shall be given by Orion on behalf of the Purchasers). The
rights reserved to the Purchasers in this paragraph are in addition to the
Purchasers' right to terminate the Offer pursuant to THE OFFER -- Section 10. If
the Purchasers shall decide, in their sole discretion, to increase or decrease
the consideration offered in the Offer to holders of Shares or to increase or
decrease the number of Shares being sought, and, at the time that notice
 
                                       13
<PAGE>   16
 
of such change is first published, sent or given to holders of Shares in the
manner specified below, the Offer is scheduled to expire at any time earlier
than the expiration of a period ending on the tenth business day from, and
including, the date that such notice is first so published, sent or given, then
the Offer will be extended at least until the expiration of such period of ten
business days. If, prior to the Expiration Date, the Purchasers shall increase
the consideration offered to holders of Shares pursuant to the Offer, such
increased consideration shall be paid to all holders whose Shares are accepted
for payment pursuant to the Offer. For purposes of the Offer, a "business day"
means any day other than a Saturday, Sunday or federal holiday, and consists of
the time period from 12:01 a.m. through 12:00 midnight, New York City time.
 
     The Commission has announced that under its interpretation of Rules
14d-4(c) and 14d-6(d) under the Exchange Act material changes in the terms of a
tender offer or information concerning the tender offer may require that the
tender offer be extended for a sufficient period of time to allow stockholders
to consider such material changes or information in deciding whether or not to
tender, withdraw or hold their shares. If the Purchasers make a material change
in the terms of the Offer or the information concerning the Offer, or Orion on
behalf of the Purchasers waives a material condition to the Offer, Orion will
disseminate additional tender offer materials to the extent required by Rules
14d-4(c) and 14d-6(d) promulgated under the Exchange Act. The minimum period
during which an offer must remain open following material changes in the terms
of the offer or information concerning the offer, other than a change in price
or a change in percentage of securities sought, will depend upon the facts and
circumstances, including the relative materiality of the terms or information
changed. With respect to a change in price or change in percentage of securities
sought, a minimum ten business day period is generally required to allow for
adequate dissemination to stockholders and investor response.
 
     The Commission has stated that in its view an offer should remain open for
a minimum of five business days from the date a material change is first
published, sent or given to securityholders, and that if material changes are
made with respect to information that approaches the significance of price and
share levels, a minimum of ten business days may be required to allow for
adequate dissemination and investor response.
 
     The Purchasers do not expect this to be the case, but should for any reason
the Rights be deemed to be exercisable, stockholders will be required to tender
one Right for each Share tendered to effect a valid tender of such Shares. See
THE OFFER -- Sections 3 and 11.
 
     Orion on behalf of the Purchasers also expressly reserves the right (i) to
delay acceptance for payment or payment for any Shares, regardless of whether
such Shares were theretofore accepted for payment, or to terminate the Offer and
not accept for payment or pay for any Shares not theretofore accepted for
payment or paid for, upon the occurrence of any of the events specified in THE
OFFER -- Section 10 by giving oral or written notice of such delay in acceptance
or payment or termination to the Depositary and (ii) at any time, or from time
to time, to amend the Offer in any respect. Any extension of the Offer, delay in
acceptance or payment, termination or amendment of the Offer will be followed as
promptly as practicable by public announcement thereof, such announcement in the
case of an extension to be issued no later than 9:00 A.M., New York City time,
on the next business day after the previously scheduled Expiration Date, in
accordance with the public announcement requirements of Rule 14d-4(c)
promulgated under the Exchange Act. Without limiting the manner in which Orion
may choose to make any public announcement, Orion shall have no obligation, and
currently does not intend, except as required by law, to publish, advertise or
otherwise communicate any such public announcement other than by issuing a
release to the Dow Jones News Service and making any appropriate filing with the
Commission.
 
     A request is being made of the Company pursuant to Rule 14d-5 under the
Exchange Act for the use of its stockholder lists and security position listings
for the purpose of disseminating the Offer to holders of Shares. This Offer to
Purchase and the related Letter of Transmittal will be mailed to record holders
of Shares and will be furnished to brokers, banks and similar persons whose
names, or the names of whose nominees, appear on the stockholder lists or, if
applicable, who are listed as participants in a clearing agency's security
position listing for subsequent transmittal to beneficial owners of Shares.
 
     2.  ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES; PRORATION.  Upon the
terms and subject to the conditions of the Offer, including the provisions
thereof relating to proration, the Purchasers shall accept for
 
                                       14
<PAGE>   17
 
payment (and thereby purchase), and the Purchasers will pay for, up to 4,600,000
Shares validly tendered and not properly withdrawn in accordance with THE
OFFER -- Section 4 (including Shares validly tendered and not withdrawn during
any extension of the Offer, if the Offer is extended, upon the terms and subject
to the conditions of such extension), as promptly as practicable after the later
to occur of (i) the Expiration Date and (ii) the satisfaction or waiver of the
conditions of the Offer set forth in THE OFFER -- Section 10. THE OFFER IS NOT
CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING TENDERED. The Purchasers
expressly reserve the right to delay acceptance for payment of or payment for
Shares in order to comply in whole or in part with any applicable law or
regulation (including the Insurance Regulatory Condition). See THE OFFER --
Sections 10 and 11. The reservation by the Purchasers of the right to delay
acceptance for payment or payment for Shares is subject to the provisions of
applicable law under Rule 14e-1 promulgated under the Exchange Act, which
require that the purchaser pay the consideration offered or return the Shares
deposited by or on behalf of stockholders promptly after termination or
withdrawal of the Offer.
 
     Upon the terms and subject to the conditions of the Offer, if more than
4,600,000 Shares are validly tendered and not withdrawn in accordance with
Section 4 of this Offer to Purchase prior to the Expiration Date, the Purchasers
will accept for payment and pay for 4,600,000 Shares, on a pro rata basis (with
appropriate adjustments to avoid purchases of fractional Shares) according to
the number of Shares properly tendered and not withdrawn by each stockholder at
or prior to the Expiration Date. In the event that proration of tendered Shares
is required, because of the difficulty of determining the precise number of
Shares properly tendered and not withdrawn (due in part to the guaranteed
delivery procedure described in Section 3), Orion on behalf of the Purchasers,
does not expect that it will be able to announce the final results of such
proration or pay for any Shares until at least five NYSE trading days after the
Expiration Date. Preliminary results of proration will be announced by press
release as promptly as practicable after the Expiration Date. Stockholders may
obtain such preliminary information from the Information Agent, the Dealer
Manager or their brokers.
 
     The Purchasers reserve the right (but shall not be obligated) to accept for
payment more than 4,600,000 Shares pursuant to the Offer, but have no present
intention of exercising such right. If a number of additional Shares in excess
of two percent of the outstanding Shares is to be accepted for payment, and, at
the time notice of the Purchasers' decision to accept for payment such
additional Shares is first published, sent or given to holders of Shares, the
Offer is scheduled to expire at any time earlier than the tenth business day
from the date that such notice is so published, sent or given, the Offer will be
extended until the expiration of such period of ten business days.
 
     In all cases, payment for Shares purchased pursuant to the Offer will be
made only after timely receipt by the Depositary of certificates for such
Shares, or timely confirmation (a "Book-Entry Confirmation") of book-entry
transfer of such Shares into the Depositary's account at The Depository Trust
Company ("DTC") or The Philadelphia Depository Trust Company ("PDTC") (sometimes
hereinafter referred to individually as a "Book-Entry Transfer Facility" and
collectively as the "Book-Entry Transfer Facilities") pursuant to the procedure
set forth in THE OFFER -- Section 3, and, in either such case, timely receipt by
the Depositary of a properly completed and duly executed Letter of Transmittal
(or facsimile thereof) with any required signature guarantees or Agent's Message
(as defined in Section 3 ) and any other documents required by the Letter of
Transmittal.
 
     For purposes of the Offer, the Purchasers shall be deemed to have accepted
for payment (and thereby purchased) tendered Shares when, as and if Orion on
behalf of the Purchasers gives oral or written notice to the Depositary of the
Purchasers' acceptance for payment of such Shares pursuant to the Offer. Upon
the terms and subject to the conditions of the Offer, payment for Shares
purchased pursuant to the Offer will in all cases be made by deposit of the
purchase price with the Depositary, which will act as an agent for the tendering
stockholders for the purpose of receiving payment from the Purchasers and
transmitting payments to tendering stockholders. Under no circumstances will
interest be paid on the purchase price by the Purchasers by reason of any delay
in making such payment.
 
     If any tendered Shares are not purchased pursuant to the Offer for any
reason, or if certificates submitted represent more Shares than are tendered,
certificates for such Shares not purchased or tendered will be
 
                                       15
<PAGE>   18
 
returned without expense to the tendering stockholder (or, in the case of Shares
delivered by book-entry transfer into the Depositary's account at a Book-Entry
Transfer Facility pursuant to the procedures set forth in THE OFFER -- Section
3, such Shares will be credited to an account maintained at such Book-Entry
Transfer Facility) as promptly as practicable following the expiration or
termination of the Offer. If for any reason whatsoever (whether before or after
the acceptance for payment of Shares), acceptance for payment of or payment for
any Shares tendered pursuant to the Offer is delayed, or the Purchasers are
unable to accept for payment or pay for Shares tendered pursuant to the Offer,
then, without prejudice to the Purchasers' rights under THE OFFER -- Section 10,
the Depositary may, nevertheless, to the extent permitted by law, retain
tendered Shares on behalf of the Purchasers, and such Shares may not be
withdrawn except to the extent that the tendering stockholders are entitled to
withdrawal rights as described in THE OFFER -- Section 4. The ability of the
Purchasers to delay the payment for the Shares which the Purchasers have
accepted for payment is limited by Rule 14e-1 under the Exchange Act referred to
above.
 
     Each of the Purchasers reserves the right to transfer or assign, in whole
or from time to time in part, to Orion or to one or more of the other
wholly-owned subsidiaries of Orion the right to purchase Shares tendered
pursuant to the Offer, but no such transfer or assignment will relieve the
Purchasers of their obligations under the Offer or prejudice the rights of
tendering stockholders, upon the terms and subject to the conditions of the
Offer, to receive payment for Shares validly tendered and accepted for payment
pursuant to the Offer.
 
     3.  PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES.  For Shares to
be validly tendered pursuant to the Offer, a properly completed and duly
executed Letter of Transmittal (or facsimile thereof) with any required
signature guarantees or Agent's Message (as defined below) and any other
documents required by the Letter of Transmittal must be received by the
Depositary at any one of its addresses set forth on the back cover of this Offer
to Purchase, and either (i) the certificates for such Shares must be delivered
to the Depositary along with the Letter of Transmittal or such Shares must be
delivered pursuant to the procedure for book-entry transfer set forth below and
a Book-Entry Confirmation must be received by the Depositary, in each case prior
to the Expiration Date, or (ii) the tendering stockholder must comply with the
guaranteed delivery procedure set forth below. The term "Agent's Message" means
a message transmitted by a Book-Entry Transfer Facility to and received by the
Depositary and forming a part of a Book-Entry Confirmation, which states that
such Book-Entry Transfer Facility has received an express acknowledgment from
the participant in such Book-Entry Transfer Facility tendering the Shares which
are the subject of such Book-Entry Confirmation, that such participant has
received and agrees to be bound by the terms of the Letter of Transmittal and
that Purchasers may enforce such agreement against such participant.
 
     The Depositary will make a request to establish an account with respect to
the Shares at each of the Book-Entry Transfer Facilities for purposes of the
Offer within two business days after the date of this Offer to Purchase, and any
financial institution that is a participant in the Book-Entry Transfer
Facilities' systems may make book-entry delivery of the Shares by causing DTC or
PDTC, as the case may be, to transfer such Shares into the Depositary's account
at such Book-Entry Transfer Facility in accordance with such Book-Entry Transfer
Facility's procedure for such transfer. However, although delivery of Shares may
be effected through a Book-Entry Transfer Facility, the Letter of Transmittal
(or facsimile thereof) with any required signature guarantees, or an Agent's
Message in connection with a book-entry transfer, and any other required
documents must, in any case, be transmitted to, and received by, the Depositary
at one of its addresses set forth on the back cover of this Offer to Purchase or
the guaranteed delivery procedure set forth below must be complied with, prior
to the Expiration Date. DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY
IN ACCORDANCE WITH THE BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES DOES NOT
CONSTITUTE DELIVERY TO THE DEPOSITARY.
 
     Except as otherwise provided below, signatures on all Letters of
Transmittal must be guaranteed by a financial institution (including most banks,
savings and loan associations and brokerage houses) which is a participant in
the Securities Transfer Association's approved medallion program (such as the
Securities Transfer Agents Medallion Program, the New York Stock Exchange
Medallion Signature Program or the Stock Exchange Medallion Program (each, an
"Eligible Institution"). Signatures on Letters of Transmittal need not be
guaranteed if the Shares tendered thereby are tendered (i) by a registered
holder of Shares who has not completed either the box entitled "Special Payment
Instructions" or the box entitled "Special
 
                                       16
<PAGE>   19
 
Delivery Instructions" on the Letter of Transmittal or (ii) for the account of
an Eligible Institution. See Instructions 1 and 5 of the Letter of Transmittal.
If the certificates for Shares are registered in the name of a person or persons
other than the signer of the Letter of Transmittal, or if payment is to be made
or unpurchased Shares are to be issued to a person other than the registered
holder or holders, then the certificates must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name or names of
the registered holder or holders appear on the certificates, with the signatures
on the certificates or stock powers guaranteed as provided in the instructions
to the Letter of Transmittal. See Instructions 1 and 5 of the Letter of
Transmittal.
 
     THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS IS AT THE OPTION AND RISK OF THE TENDERING STOCKHOLDER AND,
EXCEPT AS OTHERWISE PROVIDED IN THE LETTER OF TRANSMITTAL, THE DELIVERY WILL BE
DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF DELIVERY IS BY
MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS
RECOMMENDED.
 
     If a stockholder desires to tender Shares pursuant to the Offer and such
stockholder's certificates are not immediately available or such stockholder is
unable to deliver all documents required by the Letter of Transmittal to the
Depositary prior to the Expiration Date, or such stockholder cannot complete the
procedure for book-entry transfer on a timely basis, such Shares, nevertheless,
may be tendered if all of the following conditions are met:
 
          (i) such tender is made by or through an Eligible Institution;
 
          (ii) a properly completed and duly executed Notice of Guaranteed
     Delivery, substantially in the form provided by the Purchasers herewith, is
     received by the Depositary as provided below prior to the Expiration Date;
     and
 
          (iii) the certificates for all tendered Shares in proper form for
     transfer (or a Book-Entry Confirmation), together with a properly completed
     and duly executed Letter of Transmittal (or facsimile thereof), with any
     required signature guarantees (or in the case of a book-entry transfer, an
     Agent's Message) are received by the Depositary within three NYSE trading
     days after the date of execution of such Notice of Guaranteed Delivery.
 
     The Notice of Guaranteed Delivery may be delivered by hand or transmitted
by telegram, facsimile transmission or mail to the Depositary and must include a
guarantee by an Eligible Institution in the form set forth in such Notice of
Guaranteed Delivery and a representation that the stockholder on whose behalf
the tender is being made is deemed to own the Shares being tendered within the
meaning of Rule 10b-4 under the Exchange Act.
 
     Notwithstanding any other provision hereof, in all cases payment for Shares
tendered and accepted for payment (and thus purchased) pursuant to the Offer
will be made only after timely receipt by the Depositary of certificates for
such Shares (or a Book-Entry Confirmation), a properly completed and duly
executed Letter of Transmittal (or facsimile thereof) and any other documents
required by the Letter of Transmittal. Accordingly, payment may be made to
tendering stockholders at different times if Shares and these documents are
delivered at different times.
 
     TO PREVENT BACK-UP FEDERAL INCOME TAX WITHHOLDING WITH RESPECT TO PAYMENT
OF THE PURCHASE PRICE FOR SHARES PURCHASED PURSUANT TO THE OFFER, A STOCKHOLDER
MUST PROVIDE THE DEPOSITARY WITH HIS CORRECT TAXPAYER IDENTIFICATION NUMBER AND
CERTIFY THAT HE IS NOT SUBJECT TO BACK-UP FEDERAL INCOME TAX WITHHOLDING BY
COMPLETING THE SUBSTITUTE FORM W-9 INCLUDED IN THE LETTER OF TRANSMITTAL. SEE
INSTRUCTION 8 OF THE LETTER OF TRANSMITTAL.
 
     By executing a Letter of Transmittal as set forth above, a tendering
stockholder irrevocably appoints designees of the Purchasers as his
attorneys-in-fact and proxies, each with full power of substitution, in the
manner set forth in the Letter of Transmittal, to the full extent of such
stockholder's rights with respect to the Shares tendered by such stockholder and
accepted for payment by the Purchasers (and any and all other Shares and other
securities issued or issuable in respect thereof on or after the date of this
Offer to Purchase). All such proxies shall be considered coupled with an
interest in the tendered Shares. Such appointment will be
 
                                       17
<PAGE>   20
 
effective when, and only to the extent that, the Purchasers accept such Shares
for payment, which will be no earlier than June 5, 1996. Upon such acceptance
for payment, all prior proxies given with respect to such Shares and other
securities will, without further action, be revoked and no subsequent proxies
may be given (and if given will not be deemed effective). The designees of the
Purchasers will be empowered, among other things, to exercise all voting and
other rights of such stockholder with respect to Shares and other securities
accepted for payment as they, in their sole discretion, may deem proper at any
annual, special or adjourned meeting of the Company's stockholders, by written
consent or otherwise. Each of the Purchasers reserves the right to require that,
in order for Shares to be deemed validly tendered, immediately upon the
Purchaser's acceptance for payment of such Shares, the Purchaser must be able to
exercise full voting and other rights with respect to such Shares and other
securities issued in respect thereof.
 
     All questions as to the validity, form, eligibility (including time of
receipt) and acceptance for payment of any tender of Shares pursuant to any of
the procedures described above will be determined by Orion on behalf of the
Purchasers, in its sole discretion, which determination shall be final and
binding. Orion on behalf of the Purchasers reserves the absolute right to reject
any or all tenders of any Shares determined by it not to be in proper form or if
the acceptance for payment of or payment for such Shares may, in the opinion of
Orion's counsel, be unlawful. Orion also reserves the right to waive any defect
or irregularity in any tender with respect to any particular Shares of any
particular stockholder, and Orion's interpretation of the terms and conditions
of the Offer (including the Letter of Transmittal and the Instructions thereto)
will be final and binding. None of the Purchasers, the Dealer Manager, the
Depositary, the Information Agent, or any other person will be under any duty to
give notification of any defects or irregularities in the tender of any Shares
or will incur any liability for failure to give any such notification.
 
     It is a violation of Rule 14e-4 promulgated under the Exchange Act, for a
person, directly or indirectly, to tender Shares for his own account unless the
person so tendering (i) has a net long position equal to or greater than the
number of Shares tendered or other securities immediately convertible into, or
exercisable or exchangeable for such number of Shares and (ii) will cause such
Shares to be delivered in accordance with the terms of the Offer. Rule 14e-4
provides a similar restriction applicable to the tender or guarantee of a tender
on behalf of another person.
 
     A tender of Shares pursuant to any of the procedures described above will
constitute a binding agreement between the tendering stockholder and the
Purchasers upon the terms and subject to the conditions of the Offer, including
the tendering stockholder's acceptance of the terms and conditions of the Offer,
as well as the tendering stockholder's representation and warranty that (i) such
stockholder has a net long position in the Shares being tendered within the
meaning of Rule 14e-4 under the Exchange Act and (ii) the tender of such Shares
complies with Rule 14e-4.
 
     4.  WITHDRAWAL RIGHTS.  Except as otherwise provided in this Section 4,
tenders made pursuant to the Offer are irrevocable. Upon the terms and subject
to the conditions of the Offer, Shares tendered pursuant to the Offer may be
withdrawn at any time prior to the Expiration Date and, unless theretofore
accepted for payment pursuant to the Offer, may also be withdrawn at any time
after July 6, 1996.
 
     For withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase. Any
such notice of withdrawal must specify the name of the person who tendered the
Shares to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder, if different from that of the person having tendered such
Shares. If certificates for Shares have been delivered or otherwise identified
to the Depositary, then, prior to the physical release of such certificates, the
withdrawing stockholder also must submit to the Depositary the serial numbers
shown on the particular certificates evidencing the Shares to be withdrawn, and
the signature on the notice of withdrawal must be guaranteed by an Eligible
Institution, except in the case of Shares tendered for the account of an
Eligible Institution. If Shares have been delivered pursuant to the procedure
for book-entry transfer set forth in THE OFFER -- Section 3, any notice of
withdrawal must specify the name and account number of the account at a Book
Entry Facility to be credited with the withdrawn Shares.
 
                                       18
<PAGE>   21
 
     All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by Orion on behalf of the Purchasers,
in its sole discretion, which determination shall be final and binding. None of
the Purchasers, the Dealer Manager, the Depositary, the Information Agent, or
any other person will be under any duty to give notification of any defects or
irregularities in any notice of withdrawal or will incur any liability for
failure to give any such notification.
 
     Any Shares properly withdrawn will be deemed not to be validly tendered for
purposes of the Offer. Withdrawn Shares may be re-tendered, however, by
following any of the procedures described in THE OFFER -- Section 3 at any
subsequent time prior to the Expiration Date.
 
     5.  PRICE RANGE OF SHARES; DIVIDENDS.  The Shares are traded on the NYSE
under the symbol "GNC." The following table sets forth, for the calendar
quarters indicated, the reported high and low closing prices per Share and the
cash dividends per Share. The information for 1994 and 1995 was reported in the
1995 Annual Report. The information for 1996 was derived from reports in
published financial sources:
 
                              CLOSING SALES PRICES
 
<TABLE>
<CAPTION>
                                                                                          CASH
                                                                                        DIVIDENDS
                                                                 HIGH         LOW         PAID
<S>                                                             <C>         <C>         <C>
1996:
  Second Quarter (through May 7, 1996)........................  $16.25      $15.00        $  --
  First Quarter...............................................   17.00       13.50         .125
1995:
  Fourth Quarter..............................................   16.875      13.75         .125
  Third Quarter...............................................   19.00       15.75         .125
  Second Quarter..............................................   18.50       15.25         .125
  First Quarter...............................................   18.25       15.50         .125
1994:
  Fourth Quarter..............................................   18.375      15.125        .125
  Third Quarter...............................................   18.50       14.625        .125
  Second Quarter..............................................   16.50       14.375        .125
  First Quarter...............................................   18.75       13.75         .125
</TABLE>
 
     On May 7, 1996, the last full trading day prior to the commencement of the
Offer, the closing sales price reported by the NYSE was $16.125 per Share.
STOCKHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR THE SHARES.
 
     In 1994 the Board of Directors of the Company announced the repurchase by
the Company of up to $10,000,000 of outstanding Shares. In conjunction with the
repurchase of Shares, purchases were also made from Orion's subsidiaries by the
Company, thereby maintaining Orion's percentage beneficial ownership of Shares.
During 1994 the Company repurchased 459,200 Shares, of which 139,600 Shares were
purchased from subsidiaries of Orion. To the Purchasers' knowledge, no
additional repurchases of Shares have been made by the Company since December
31, 1994. The average repurchase price of Shares repurchased was $14.45. In view
of applicable regulations under the Exchange Act, the Purchasers expect that any
repurchase program would be suspended during the Offer.
 
     6.  EFFECT OF THE OFFER ON THE MARKET FOR THE SHARES; QUOTATION ON THE
NYSE; REGISTRATION UNDER THE EXCHANGE ACT.  The purchase of Shares by the
Purchasers pursuant to the Offer will reduce the number of Shares that might
otherwise trade publicly and, depending on the number of Shares purchased, may
reduce the number of holders of Shares and could affect the liquidity and market
value of the remaining Shares held by the public.
 
     According to the NYSE's published guidelines, the NYSE would consider
delisting the Shares if, among other things, the number of record holders of at
least 100 Shares should fall below 1,200, the number of
 
                                       19
<PAGE>   22
 
publicly held Shares (exclusive of holdings of officers, directors, their
immediate families and other concentrated holdings of 10% or more ("NYSE
Excluded Holdings")) should fall below 600,000 or the aggregate market value of
publicly held Shares (exclusive of NYSE Excluded Holdings) should fall below
$5,000,000.
 
     The Purchasers do not presently believe that under the published guidelines
described above, the purchase of up to 4,600,000 Shares pursuant to the Offer
will result in a delisting of the Shares by the NYSE. According to the 1995
Annual Report, there were approximately 2,000 holders of Shares as of February
29, 1996 and December 31, 1995. If, however, as a result of the purchase of
Shares pursuant to the Offer or otherwise, the Shares no longer meet the
requirements of the NYSE for continued listing and/or trading and such trading
of the Shares were discontinued, the market for the Shares could be adversely
affected.
 
     In the event that the Shares should no longer be listed or traded on the
NYSE, Orion believes that the Company will be able to arrange for the Shares to
trade on another national securities exchange or in the over-the-counter market
and that price quotations would be reported by such exchange, through the NASDAQ
or other sources. Such trading and the availability of such quotations would,
however, depend upon the number of stockholders and/or the aggregate market
value of the Shares remaining at such time, the interest in maintaining a market
in the Shares on the part of securities firms, the possible termination of
registration of the Shares under the Exchange Act as described below and other
factors.
 
  Exchange Act Registration
 
     The Shares are currently registered under the Exchange Act. While the
Purchasers do not expect deregistration to occur as a result of the consummation
of the Offer for up to 4,600,000 Shares, there can be no assurance that the
purchase of the Shares pursuant to the Offer will not result in the Shares
becoming eligible for deregistration under the Exchange Act. Registration of the
Shares may be terminated if the Shares are not listed on a "national securities
exchange" and there are fewer than 300 record holders of Shares. Termination of
registration of the Shares under the Exchange Act would substantially reduce the
information required to be furnished by the Company to its stockholders and the
Commission and would make certain provisions of the Exchange Act, such as the
short-swing profit recovery provisions of Section 16(b) and the requirements of
furnishing a proxy statement in connection with stockholders' meetings pursuant
to Section 14(a), no longer applicable to the Company. If the Shares should no
longer be registered under the Exchange Act, the requirements of Rule 13e-3
under the Exchange Act with respect to "going private" transactions would no
longer be applicable to the Company. Furthermore, the ability of "affiliates" of
the Company and persons holding "restricted securities" of the Company to
dispose of such securities pursuant to Rule 144 promulgated under the Securities
Act of 1933, as amended, may be impaired or eliminated.
 
  Margin Regulations
 
     The Shares are currently "margin securities" under the regulations of the
Board of Governors of the Federal Reserve System (the "Federal Reserve Board"),
which have the effect, among other things, of allowing brokers to extend credit
on the collateral of such Shares for the purpose of buying, carrying or trading
in securities ("Purpose Loans"). While Orion does not presently expect that this
will occur, depending upon factors such as the number of record holders of the
Shares and the number and market value of publicly held Shares, following the
purchase of up to 4,600,000 Shares pursuant to the Offer, the Shares might no
longer constitute "margin securities" for purposes of the Federal Reserve
Board's margin regulations and, therefore, no longer be able to be used as
collateral for Purpose Loans made by brokers. In addition, if registration of
the Shares under the Exchange Act should be terminated, the Shares would no
longer constitute "margin securities."
 
     The continuation of such trading and the continued availability of such
quotations would depend, however, upon the number of holders of Shares remaining
at such time, the interest in maintaining a market in the Shares on the part of
securities firms, the possible termination of registration under the Exchange
Act, as described below, and other factors.
 
                                       20
<PAGE>   23
 
     7.  CERTAIN INFORMATION CONCERNING THE COMPANY.  The Company is
incorporated under the laws of the State of Colorado. Its principal executive
offices are located at 9800 South Meridian Boulevard, Englewood, Colorado 80112,
and its telephone number is (303) 754-8400. The Company is a holding company
whose principal business is conducted through wholly-owned subsidiaries. The
following information about the Company is derived from its 1995 Annual Report
on Form 10-K. The Company and its subsidiaries principally underwrite and sell
specialty property and casualty insurance coverages which are not readily
available in traditional insurance markets. Personal and commercial automobile
insurance accounted for approximately 84% of the Company's net premiums written
during 1995. The Company's personal lines unit principally writes nonstandard
automobile insurance for individuals who do not qualify for preferred or
standard insurance because of their payment history, driving records, ages,
vehicle types, or other factors, including market conditions for standard risks.
The Company's commercial lines unit principally writes nonstandard commercial
automobile coverage. Typical risks include local and intermediate trucking,
garages, used car dealers, public and private livery, and artisan contractors.
Other commercial lines coverages include property, general liability, umbrella
and excess insurance, standard multi-peril packages and other coverages.
 
     Nonstandard risks generally involve a potential for poor claims experience
because of increased risk exposure. Premium levels for nonstandard risks are
substantially higher than for preferred or standard risks. In personal lines,
the Company's loss exposure is limited by the fact that nonstandard drivers
typically purchase low liability limits, often at a state's statutory minimum.
The nonstandard insurance industry is also characterized by the insurer's
ability to minimize its exposure to unprofitable business by effecting timely
changes in premium rates and policy terms in response to changing loss and other
experiences. In those states where prior approval for rate changes is required,
the Company has generally gained approval in a timely manner. The Company also
writes business in states where prior approval to effectuate rate changes is not
required.
 
     Many nonstandard risks written by the Company require specialized
underwriting, claims management, and other skills and experience. The Company
historically has focused its operations in those nonstandard markets where it
expects that its expertise and market position will allow it to generate an
underwriting profit. An indicator of underwriting profit is a generally accepted
accounting principles ("GAAP") combined ratio of less than 100%. Although the
Company's GAAP combined ratio for the year ended December 31, 1995, was 105.3%,
the Company has achieved a GAAP combined ratio of less than 100% in four of the
last five years. The Company's average GAAP combined ratio for all its lines for
the five-year period ending 1995 was 99.9%.
 
     Commercial lines business is written through three divisions. The general
and specialty divisions write business through 68 general agents and various
brokers throughout the United States except for New Jersey, Massachusetts and
five other Northeastern states. These agents specialize in particular types of
risks and/or geographic locations. The general division primarily offers
commercial coverages for transportation risks and small to medium businesses.
The specialty division primarily offers regional programs, specialized coverages
for medium-sized businesses, and umbrella coverages for a variety of
organizations. Also, during 1995, the specialty division implemented a new
personal automobile physical damage program in California. The Company's
objective for its general and specialty business is to maintain long-term
mutually profitable relationships with a small number of selected general agents
who follow strict underwriting guidelines.
 
     The Company's third commercial lines division is the standard division,
with business written by Colorado Casualty Insurance Company ("CCIC"). CCIC
writes small standard commercial package policies primarily in the Rocky
Mountain region, but has recently expanded into states outside of the Rocky
Mountain region. This expansion has primarily occurred in the Southeast Region
of the United States. CCIC has been successful in serving a niche market of
approximately 510 small to medium retail agents. In addition, CCIC utilizes five
general agents as branch offices. The standard business produced by CCIC
complements the nonstandard focus of the commercial lines unit.
 
     In August 1994, the Company acquired General Electric Mortgage Insurance
Corporation of California ("GEMIC"), an inactive insurance company licensed in
California. As part of the acquisition, the Company renamed GEMIC as Guaranty
National Insurance Company of California ("GNICOC"). The GNICOC
 
                                       21
<PAGE>   24
 
acquisition allowed for the expansion of the Company's commercial business and
has reduced fees previously paid to Orion insurance subsidiaries in connection
with business produced in California.
 
     In July 1995, the Company acquired Viking Holdings and its wholly-owned
subsidiaries, Viking Insurance Company of Wisconsin ("VICW") and Viking General
Agency, which is headquartered in Madison, Wisconsin. Viking is a property and
casualty insurance company writing nonstandard personal automobile insurance.
The acquisition of Viking has enabled the Company to change its business mix,
expand its personal lines business into new territories, strengthen personal
lines market share in existing states, and provide flexibility in marketing the
Company's personal lines products. Following the acquisition, the Company
entered into 100% reinsurance agreements with Viking County Mutual Insurance
Company ("VCM"), whereby the Company assumes business written by this affiliate.
Included in 1995 premiums assumed was $5,525,000 of premiums written under these
agreements. The policy issue fee charged by VCM is offset by the management fee
charged by the Company to VCM.
 
     Personal lines business is written through two divisions: the Guaranty
National division and the Viking division. The Guaranty National division
provides personal lines automobile coverage through approximately 2,500
independent agents located in 22 states, primarily in the Rocky Mountain and
Pacific Northwest regions. In addition, this division markets business through
four general agents. In recent years, this division has begun marketing its
personal lines products in Louisiana, Indiana, Ohio and Virginia. Additionally,
during the third quarter of 1995, this division discontinued writing new
policies in the state of Texas. However, renewals of existing policies will
continue to be made so as to remain in compliance with the regulations of the
Texas Insurance Department.
 
     The Viking division writes nonstandard personal automobile coverage through
approximately 5,400 independent insurance agents in 18 states. The states in
which the Viking division writes the largest amount of net premiums are
California, Washington, Texas and Wisconsin. Viking primarily sells
minimum-limits policies on a monthly basis, with a one-month downpayment and a
monthly payment option.
 
     Overall, the Company seeks to distinguish itself from its personal lines
competitors by providing a superior, highly automated and responsive level of
service to its agents and insureds. In addition to high quality service, the
Company's personal lines unit provides ease of payment for insureds.
 
     The Company also writes collateral protection insurance, primarily insuring
automobiles pledged as security for loans for which the borrower has not
maintained physical damage coverage as required by the lender. The business is
written through a wholly-owned general agency which, in turn, obtains business
from 32 general agents across the country. During 1995, this division expanded
geographically into the Commonwealth of Puerto Rico.
 
     Commercial lines, personal lines and collateral protection represented 44%,
44% and 12%, respectively, of the Company's gross premiums written during 1995.
 
     A.M. Best Company currently rates the GNIC and its subsidiaries "A
(Excellent)" and VICW and its affiliate "A- (Excellent)." A.M. Best ratings are
based upon factors of concern to policyholders, agents and reinsurers and are
not primarily directed toward the protection of investors.
 
     The Company is required to file periodic reports, proxy statements and
other information with the Commission under the Exchange Act relating to its
business, financial statements and other matters. The Company is required to
disclose in such proxy statements certain information, as of particular dates,
concerning its directors and officers, their remuneration, stock, options
granted to them, the principal holders of the Company's securities, and any
material interests of such persons in transactions with the Company. Such
reports, proxy statements and other information may be inspected at the public
reference facilities maintained by the Commission at Room 1024, Judiciary Plaza,
450 Fifth Street, N.W., Washington, D.C. 20549, and should also be available for
inspection and copying at the regional offices of the Commission located in
Northwestern Atrium Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661 and 7 World Trade Center, 13th Floor, New York, New York 10048.
Copies of such material can also be obtained from the Public Reference Room of
the Commission in Washington, D.C. at prescribed rates. Similar information can
be inspected and copied at the NYSE, 20 Broad Street, New York, New York.
 
                                       22
<PAGE>   25
 
     Set forth below is certain summary consolidated financial information
derived from the 1995 Annual Report and from the March 10-Q. More comprehensive
financial information and other information is included in the Company's 1995
Annual Report, the March 10-Q and the other documents filed by the Company with
the Commission, and such summary financial information is qualified in its
entirety by reference to such reports and should be considered in connection
with the more comprehensive financial information in such reports and other
publicly available reports and documents filed with the Commission, including
the financial statements and related notes contained therein. Such material may
be examined at the offices of and copies may be obtained from the Commission.
 
                         GUARANTY NATIONAL CORPORATION
                         SELECTED FINANCIAL INFORMATION
                (IN THOUSANDS EXCEPT PER SHARE DATA AND RATIOS)
 
<TABLE>
<CAPTION>
                                                      THREE MONTHS               YEAR ENDED
                                                     ENDED MARCH 31,            DECEMBER 31,
                                                  ---------------------     ---------------------
                                                    1996         1995         1995         1994
<S>                                               <C>          <C>          <C>          <C>
Income Statement Data(a):
  Premiums earned...............................  $115,470     $ 79,468     $390,017     $321,638
  Total revenues................................   126,704       86,502      424,284      348,223
  Operating earnings(b)(c)......................  $  4,499     $  5,398     $  6,790     $ 20,596
  After-tax realized investment gains...........     1,288          370        2,139        1,955
                                                  --------     --------     --------     --------
     Net earnings(c)............................  $  5,787     $  5,768     $  8,929     $ 22,551
                                                  ========     ========     ========     ========
  Earnings per common share:
     Operating earnings(b)......................  $    .30     $    .45     $    .51     $   1.70
     After-tax realized investment gains........       .09          .03          .16          .16
                                                  --------     --------     --------     --------
          Net earnings..........................  $    .39     $    .48     $    .67     $   1.86
                                                  ========     ========     ========     ========
  GAAP combined ratio...........................     101.6%        97.7%       105.3%        97.5%
Balance Sheet Data(d):
  Total assets..................................  $879,308     $617,235     $875,173     $605,088
  Total assets less goodwill....................   846,237      594,027      842,040      581,684
  Stockholders' equity..........................   215,159      156,289      215,551      144,759
  Book value per common share...................     14.38        12.98        14.41        12.02
</TABLE>
 
     The following summary pro forma information (unaudited) assumes the Viking
acquisition had occurred on January 1, 1995 and 1994. These amounts reflect
adjustments used in recording the purchase, such as adjustments for interest on
notes payable issued as part of the purchase price, amortization of goodwill,
and fees eliminated as a result of the acquisition.
 
<TABLE>
<CAPTION>
                                                                          YEAR ENDED
                                                                         DECEMBER 31,
                                                                     ---------------------
                                                                       1995         1994
    <S>                                                              <C>          <C>
    Total revenue..................................................  $512,718     $509,657
    Net income.....................................................     7,765       30,014
    Earnings per common share......................................       .53         2.05
</TABLE>
 
- ---------------
(a) The computation of the ratio of earnings to fixed charges has not been made
    as the Company has neither publicly held debt securities nor preferred stock
    outstanding.
 
(b) Earnings after taxes, excluding realized investment gains and losses.
 
(c) Full year 1994 results include a nonrecurring relocation charges of
    $838,000.
 
(d) The computation of working capital has not been made as it is not applicable
    to insurance enterprises.
 
                                       23
<PAGE>   26
 
     Certain additional information concerning the Company and its subsidiaries
and the transactions between the Company and its subsidiaries and Orion and its
subsidiaries is set forth in this Offer to Purchase under INTRODUCTION, SPECIAL
FACTORS -- "Background of the Transaction;" -- "Certain Effects of the
Transaction" and -- "Interests of Certain Persons in the Transaction; Securities
Ownership: Related Transactions." Highlights from the Company's 1996 operating
plan prepared by the Company's management are included in SPECIAL
FACTORS -- "Fairness of the Offer."
 
     8. CERTAIN INFORMATION CONCERNING THE PURCHASERS.
 
     Orion is a property and casualty insurance holding company. Its insurance
subsidiaries and affiliates are authorized to underwrite and sell most types of
property and casualty insurance. Such insurance businesses are concentrated in
niche insurance markets, particularly workers compensation, professional
liability, nonstandard automobile insurance (through its slightly less than 50%
interest in the Company) and underwriting ocean marine, inland marine and
property insurance through underwriting pools. EBI Companies provide workers
compensation insurance products and DPIC Companies sell professional liability
insurance. Other specialty property and casualty insurance is written
principally through Connecticut Specialty Insurance Group. Orion and its
subsidiaries also offer assumed reinsurance through SecurityRe Companies and
underwriting management and related services through Wm. H. McGee & Co., Inc.
("McGee").
 
     Orion also owns approximately 22% of the outstanding common stock of
Intercargo Corporation ("Intercargo"), an insurance holding company whose
subsidiaries specialize in international trade and transportation coverages. In
February 1995, the Company and Intercargo reached an agreement which permits the
Company to purchase additional shares from time to time, to bring its ownership
up to 24.9% of Intercargo's outstanding common stock. Intercargo operates as an
independent company.
 
     On June 30, 1995, Orion purchased all the capital stock of McGee for
$22,000,000 in cash. McGee has been underwriting ocean marine, inland marine and
property insurance on behalf of the insurance companies it represents for over
108 years. Security Insurance Company of Hartford has been represented by McGee
for over a century. McGee provides all related services in connection with this
business, including policy issuance, claim settlement, accounting and placement
of reinsurance. Operations are conducted in the United States through its head
office in New York and twenty branch offices throughout the country. Activities
in Canada, Bermuda and Puerto Rico are managed by McGee's subsidiaries located
in those jurisdictions.
 
     Orion was incorporated under the laws of the State of Delaware in 1960.
Orion's principal executive offices are located at 600 Fifth Avenue, New York,
New York 10020, and its telephone number is (212) 332-8080. The home office of
Orion's wholly-owned insurance subsidiaries, including the Purchasers, is
located at 9 Farm Springs Drive, Farmington, Connecticut 06032. Their telephone
number is (860) 674-6600.
 
     Orion's insurance, brokerage and management subsidiaries are licensed to
transact business throughout the United States and in all Canadian provinces.
They obtain substantially all of their business from approximately 3,000
independent insurance agents and brokers. Orion has approximately 2,200
employees, substantially all of whom are employed in Orion's insurance-related
operations.
 
     Certain information, including the name, business address, citizenship,
present principal occupation or employment and five-year employment history of
each of the executive officers and directors of the Purchasers is set forth in
Schedule I hereto.
 
     Set forth below is certain summary consolidated financial information
derived from Orion's Annual Report on Form 10-K for the year ended December 31,
1995 and its Quarterly Report on Form 10-Q for the quarter ended March 31, 1996.
Such summary financial information is qualified in its entirety by reference to
such reports and should be considered in connection with the more comprehensive
financial information in such reports and other publicly available reports and
documents filed with the Commission.
 
                                       24
<PAGE>   27
 
                           ORION CAPITAL CORPORATION
                   SUMMARY CONSOLIDATED FINANCIAL INFORMATION
                (IN THOUSANDS EXCEPT PER SHARE DATA AND RATIOS)
 
<TABLE>
<CAPTION>
                                                       THREE MONTHS               YEAR ENDED
                                                      ENDED MARCH 31,            DECEMBER 31,
                                                  -----------------------   -----------------------
                                                     1996         1995         1995         1994
<S>                                               <C>          <C>          <C>          <C>
Income Statement Data
  Premiums earned...............................  $  186,932   $  175,058   $  749,003   $  691,223
  Total revenues................................     221,087      201,797      874,280      780,947
  Operating earnings (a)........................  $   15,683   $   15,398   $   59,914   $   52,818
  After-tax realized investment gains...........       2,204        1,664        7,708        2,427
                                                   ---------    ---------    ---------    ---------
     Net earnings...............................  $   17,887   $   17,062   $   67,622   $   55,245
                                                   =========    =========    =========    =========
  Earnings per common share:
     Operating earnings (a).....................  $     1.12   $     1.08   $     4.22   $     3.68
     After-tax realized investment gains........         .16          .12          .55          .17
                                                   ---------    ---------    ---------    ---------
     Net earnings...............................  $     1.28   $     1.20   $     4.77   $     3.85
                                                   =========    =========    =========    =========
  GAAP combined ratio...........................        99.4%       101.2%       100.3%       101.2%
Balance Sheet Data
  Total assets..................................  $2,537,445   $2,162,921   $2,473,588   $2,112,761
  Stockholder's equity..........................     487,792      402,512      490,903      365,088
  Book value per share..........................       35.15        28.60        35.18        26.00
</TABLE>
 
- ---------------
(a) Earnings after taxes, excluding realized investment gains and losses
 
     As described in this Offer to Purchase under INTRODUCTION and SPECIAL
FACTORS "Background of the Transaction" and -- "Interests of Certain Persons in
the Transaction; Securities Ownership; Related Transactions," as of the date
hereof, Orion is the beneficial owner through its subsidiaries of 7,409,942
Shares.
 
     Except as described in INTRODUCTION and SPECIAL FACTORS -- "Background of
the Transaction:" and -- "Interests of Certain Persons in the Transaction;
Securities Ownership; Related Transactions" or elsewhere in this Offer to
Purchase, none of the directors or executive officers or subsidiaries of the
Purchasers has any interest, direct or indirect, in any material transaction or
material proposed transaction to which the Company or its subsidiaries is or was
a party.
 
     Except as described in SPECIAL FACTORS -- "Background of the Transaction,"
"Certain Effects of the Transaction" and -- "Interests of Certain Persons in the
Transaction; Securities Ownership; Related Transactions," or as set forth
elsewhere in this Offer to Purchase or in Schedule I, no Purchaser, nor to the
best knowledge of the Purchasers, any of the persons listed in Schedule I hereto
or any associate or majority-owned subsidiary of Orion or any of the persons so
listed, beneficially owns or has a right to acquire any of the Shares, and
neither Orion nor to the best knowledge of the Orion, any executive officer,
director or majority-owned subsidiary of any of the foregoing, has effected any
transaction in the Shares during the past 60 days.
 
     Except as described in SPECIAL FACTORS -- "Certain Transactions"
and -- "Interests of Certain Persons in the Transaction; Securities Ownership;
Related Transactions" and as described elsewhere in this Offer to Purchase,
neither Orion, nor any direct or indirect subsidiary of Orion nor, to the best
knowledge of Orion, any of the persons listed in Schedule I hereto, has any
contract, arrangement, understanding or relationship with any other person with
respect to any securities of the Company, including, but not limited to,
contracts, arrangements, understandings or relationships concerning the transfer
or voting of such securities, joint ventures, loan or option arrangements, puts
or calls, guaranties of loans, guaranties against loss or the giving or
withholding of proxies, consents or authorizations. Except as set forth in this
Offer to Purchase, since January 1, 1993, there have been no transactions that
would be required to be reported under the rules of the
 
                                       25
<PAGE>   28
 
Commission between Orion or, to the best knowledge of Orion, any of the persons
listed in Schedule I hereto, and the Company or any of its executive officers,
directors or affiliates. Except as described in SPECIAL FACTORS -- "Background
of the Transaction"; "Certain Effects of the Transaction" and -- "Interests of
Certain Persons in the Transaction; Related Transactions; Securities Ownership,"
and as set forth elsewhere in this Offer to Purchase, since January 1, 1993,
there have been no other contacts, negotiations or transactions between Orion or
any of its subsidiaries or, to the best knowledge of Orion, any of the persons
listed in Schedule I hereto, and the Company or its directors, executive
officers or affiliates, or between any affiliates of the Company, or between the
Company or any of its affiliates and any person not affiliated with the Company
and who would have a direct interest therein, concerning a merger, consolidation
or acquisition, a tender offer or other acquisition of securities of the
Company, an election of directors of the Company, or a sale or other transfer of
a material amount of assets.
 
     Orion is subject to the information filing requirements of the Exchange Act
and in accordance therewith files reports, proxy statements and other
information with the Commission relating to its business, financial condition
and other matters. Information, as of particular dates, concerning Orion's
directors and officers, their remuneration, options granted to them, the
principal holders of Orion's securities and any material interest of such
persons in transactions with Orion is disclosed in proxy statements distributed
to Orion's stockholders and filed with the Commission. Such reports, proxy
statements and other information may be examined, and copies may be obtained
from the Commission, in the manner set forth in THE OFFER -- Section 7 with
respect to information concerning the Company. Such information should also be
available for inspection at the NYSE, 20 Broad Street, New York, New York 10005.
 
     9.  DIVIDENDS AND DISTRIBUTIONS.  Except for any action taken by the
Company which shall have been expressly approved in writing by Orion on behalf
of the Purchasers:
 
     If, on or after May 8, 1996, the Company should declare or pay any dividend
on the Shares or other distribution except for the Regular Dividend (as defined
below) (including, without limitation, the issuance of additional Shares
pursuant to a stock dividend or stock split, the issuance of other securities,
or the issuance of rights for the purchase of any securities) with respect to
the Shares that is payable or distributable to stockholders of record on a date
prior to the transfer to the name of a Purchaser or its nominee or transferee on
the Company's stock transfer records of the Shares purchased pursuant to the
Offer, then, without prejudice to the Purchasers' rights under THE
OFFER -- Section 1 and -- Section 10, (i) the purchase price per Share payable
by the Purchasers, pursuant to the Offer shall be reduced to the extent any such
dividend or distribution is payable in cash and (ii) any non-cash dividend,
distribution or right shall be remitted by the tendering stockholder to the
Depositary for the account of the Purchasers, accompanied by appropriate
documentation of transfer. Pending such remittance, and subject to applicable
law, the Purchasers shall be entitled to all rights and privileges as owner of
any such non-cash dividend, distribution or right and may withhold the entire
purchase price or deduct from the purchase price the amount or value thereof, as
determined by the Purchasers in their sole discretion. The Company has, since
January 1, 1994, declared regular quarterly dividends at the rate of $0.125 per
share. If, during the second quarter of 1996 the Company declares a dividend of
not more than $0.125 per share (the "Regular Dividend"), the Purchasers do not
intend to adjust the Offer Price should the record date for payment of such
Regular Dividend be a date prior to the Purchasers' acceptance for payment and
payment for Shares tendered pursuant to the Offer. See THE OFFER -- Section 10.
 
     If, on or after May 8, 1996, the Company should (i) split, combine or
otherwise change the Shares or its capitalization, (ii) issue or sell any
additional securities of the Company or otherwise cause an increase in the
number of outstanding securities of the Company or (iii) acquire currently
outstanding Shares or otherwise cause a reduction in the number of outstanding
Shares, or shall disclose that it has taken such action, then, without prejudice
to the Purchasers' rights under THE OFFER -- Section 10, the Purchasers, in
their sole discretion, may make such adjustments in the Offer price and other
terms of the Offer (including, without limitation, the number and type of
securities to be purchased) as it deems appropriate, including, without
limitation, the amount and type of securities to be offered to be purchased.
 
                                       26
<PAGE>   29
 
     10.  CERTAIN CONDITIONS OF THE OFFER.  Notwithstanding any other provision
of the Offer, and in addition to (and not in limitation of) the Purchasers'
rights to amend the Offer at any time in their sole discretion, the Purchasers
will not be required to accept for payment, or pay for, any Shares tendered, and
may terminate, extend or amend the Offer, or, subject to the provisions of
applicable law which require that the Purchasers pay the consideration offered
or return the Shares deposited by or on behalf of stockholders promptly after
termination or withdrawal of the Offer, may delay the acceptance for payment or
the payment for Shares tendered, if, at any time on or after May 8, 1996, and at
or prior to the time of payment for any such Shares (whether or not any Shares
have theretofore been accepted for payment or paid for pursuant to the Offer),
any of the following events shall occur, which in the sole judgment of Orion, on
behalf of the Purchasers, in any case and regardless of the circumstances giving
rise to any such condition (including any action or inaction by Orion or any of
its subsidiaries or affiliates other than the Company) makes it inadvisable to
proceed with the Offer or with acceptance for payment or payment for Shares:
 
          (a) any change shall have occurred or be threatened in the business,
     operations or financial condition of the Company or any of its subsidiaries
     or affiliates which is or which the Purchasers in their sole discretion
     believe is threatened to be materially adverse to the Company and its
     subsidiaries taken as a whole;
 
          (b) the Purchasers shall not have received or obtained all required
     state insurance department regulatory approvals necessary for the
     Purchasers to consummate the Offer on terms and conditions satisfactory to
     the Purchasers in their sole discretion (see INTRODUCTION and THE OFFER --
     Section 11(a));
 
          (c) the waiting periods applicable to the Offer under the
     Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, shall not
     have expired or been earlier terminated by the Department of Justice or the
     Federal Trade Commission;
 
          (d) there shall have been threatened, instituted or pending any action
     or proceeding by or before any court or governmental regulatory or
     administrative agency, authority or tribunal, domestic or foreign, which
     (i) seeks to challenge the acquisition by the Purchasers of the Shares, or
     to restrain, prohibit or delay the making or consummation of the Offer,
     (ii) seeks to make the purchase of, or payment for, some or all of the
     Shares pursuant to the Offer illegal, (iii) seeks to impose material
     limitations on the ability of the Purchasers (or any of their affiliates)
     effectively to acquire or hold, or requires any of the Purchasers, or the
     Company, or any of their respective affiliates or subsidiaries to dispose
     of or hold separate, any material portion of the assets or the business of
     Orion and its affiliates taken as a whole or the Company and its
     subsidiaries taken as a whole, (iv) seeks to impose material limitations on
     the ability of the Purchasers (or their affiliates) to exercise full rights
     of ownership of the Shares purchased, including, but not limited to, the
     right to vote the Shares purchased on all matters properly presented to the
     stockholders of the Company or (v) may result in a material diminution in
     the benefits expected to be derived by the Purchasers as a result of the
     transactions contemplated by the Offer;
 
          (e) there shall have been proposed, sought, promulgated, enacted,
     entered, enforced or deemed applicable to the Offer, by any state, federal
     or foreign government or governmental authority or by any domestic or
     foreign court, any statute, rule, regulation, judgment, order or
     injunction, that, in the sole judgment of Orion, might, directly or
     indirectly, result in any of the consequences referred to in clauses (i)
     through (v) of (d) above;
 
          (f) the Purchasers shall have failed to receive all other governmental
     or third party consents and approvals, in addition to those referred to in
     (b) and (c) above, to consummation of the Offer which, if not received,
     would in the aggregate have or be reasonably anticipated to have a
     materially adverse effect on Orion or the Company or any of their
     respective subsidiaries, or Orion shall have determined in good faith that
     consummation of the Offer would cause a breach of or constitute (with or
     without due notice or lapse of time or both) a default (or give rise to any
     right of termination, cancellation or acceleration) under agreements or
     other obligations of the Company which would individually or in the
     aggregate have or be reasonably anticipated to have a materially adverse
     effect on Orion or the Company or any of their respective subsidiaries;
 
                                       27
<PAGE>   30
 
          (g) there shall have occurred (i) any general suspension of trading
     in, or limitation on prices for, securities on any national securities
     exchange or in the over-the-counter market in the United States, (ii) the
     declaration of a banking moratorium or any suspension of payments in
     respect of banks in the United States, (iii) a material adverse change in
     United States or any other currency exchange rates or a suspension of, or a
     limitation on, the markets therefor, (iv) the commencement of a war, armed
     hostilities or other international or national calamity directly or
     indirectly involving the United States, (v) any limitation (whether or not
     mandatory) by any governmental authority on, or any other event which, in
     the sole judgment of Orion, might affect the extension of credit by banks
     or other lending institutions, or (vi) in the case of any of the foregoing
     existing at the time of the commencement of the Offer, in the sole judgment
     of Orion, a material acceleration or worsening thereof;
 
          (h) unless Orion shall have consented in writing on behalf of the
     Purchasers, the Company or any of its subsidiaries shall have, on or after
     May 8, 1996, (i) issued, distributed, pledged or sold, or authorized,
     proposed or announced the issuance, distribution, pledge or sale of (A) any
     shares of capital stock (including, without limitation, the Shares), or
     securities convertible into any such shares, or any rights, warrants, or
     options to acquire any such shares or convertible securities, other than
     Shares issued or sold upon the exercise (in accordance with the present
     terms thereof) of employee stock options outstanding on March 31, 1996 or
     (B) any other securities in respect of, in lieu of, or in substitution for
     Shares (ii) purchased or otherwise acquired, or proposed or offered to
     purchase or otherwise acquire, any outstanding Shares or other securities,
     (iii) declared or paid any dividend or distribution (other than the Regular
     Dividend) on any shares of capital stock or issued, or authorized,
     recommended or proposed the issuance of, any other distribution in respect
     of the Shares, whether payable in cash, securities or other property, or
     altered or proposed to alter any material term of any outstanding security,
     (iv) issued, or announced its intention to issue, any debt securities or
     any securities convertible into or exchangeable for debt securities or any
     rights, warrants or options entitling the holder thereof to purchase or
     otherwise acquire any debt securities, or incurred, or announced its
     intention to incur, any debt other than in the ordinary course of business
     and consistent with past practice, (v) authorized, recommended, proposed or
     publicly announced its intention to enter into (A) any merger,
     consolidation, liquidation, dissolution, business combination, acquisition
     of assets or securities or disposition of assets or securities other than
     in the ordinary course of business, (B) any material change in its
     capitalization, (C) any release or relinquishment of any material contract
     rights, or (D) any comparable event not in the ordinary course of business,
     (vi) authorized, recommended or proposed or announced its intention to
     authorize, recommend or propose any transaction which could adversely
     affect the value of the Shares, (vii) proposed, adopted or authorized any
     amendment to its articles of incorporation or by-laws or similar
     organizational documents or the Purchasers shall have learned about any
     such proposal or amendment which shall not have been previously disclosed
     or (viii) agreed in writing or otherwise to take any of the foregoing
     actions;
 
          (i) the Company or any of its subsidiaries shall have entered into any
     employment, severance or similar agreement, arrangement or plan with any of
     its employees other than in the ordinary course of business or entered into
     or amended any agreements, arrangements or plans so as to provide for
     increased benefits to the employee as a result of or in connection with the
     transactions contemplated by the Offer;
 
          (j) a tender or exchange offer for some portion or all of the Shares
     shall have been publicly proposed to be made or shall have been made by
     another person (including the Company or any of its subsidiaries or
     affiliates), or it shall have been publicly disclosed or Orion shall have
     learned that (i) any person or "group" (as defined in Section 13(d) (3) of
     the Exchange Act) shall have acquired or proposed to acquire more than 5%
     of any class or series of capital stock of the Company (including the
     Shares) or shall have been granted any option or right to acquire more than
     5% of any class or series of capital stock of the Company (including the
     Shares), other than acquisitions for bona fide arbitrage positions and
     other than acquisitions by persons or groups who have publicly disclosed
     such ownership on or prior to May 8, 1996, or (ii) any such person or group
     who has publicly disclosed any such ownership of more than 5% of any class
     or series of capital stock of the Company (including the Shares) prior to
     such date shall have acquired or proposed to acquire additional Shares
     constituting more than 2% of any class or series of capital stock of the
     Company (including the Shares) or shall have been granted any
 
                                       28
<PAGE>   31
 
     option or right to acquire more than 2% of any class or series of capital
     stock of the Company (including the Shares); or
 
          (k) the Rights shall have become exercisable or for any reason Orion
     and its subsidiaries shall not be deemed to be "Exempt Persons" (see THE
     OFFER -- Section 11),
 
     The foregoing conditions are for the sole benefit of the Purchasers and may
be asserted by the Purchasers regardless of the circumstances giving rise to any
such condition and may be waived by the Purchasers, in whole or in part, at any
time and from time to time in the sole discretion of the Purchasers. The failure
by the Purchasers at any time to exercise their rights under any of the
foregoing conditions shall not be deemed a waiver of any such rights and each
such right shall be deemed an ongoing right which may be asserted at any time or
from time to time. Any determination by Orion on behalf of the Purchasers
concerning the events described in this Section 10 will be final and binding on
all parties, including tendering stockholders.
 
     11.  CERTAIN LEGAL MATTERS.  Based upon Orion's examination of publicly
available information filed by the Company with the Commission and other
publicly available information with respect to the Company, except as otherwise
set forth in this Section 11, Orion is not aware of any license or regulatory
permit which appears to be material to the business of the Company and its
subsidiaries that might be adversely affected by the acquisition of Shares
pursuant to the Offer, or, except as disclosed below, of any approval or other
action by any state, federal or foreign governmental or administrative or
regulatory agency that would be required for the acquisition of the Shares as
contemplated herein. Should any such license, permit, approval or other action
be required, it is presently contemplated that the same would be sought, except
as described below under "State Takeover Statutes." While Orion does not
currently intend to delay the acceptance for payment of, or payment for, Shares
pending the outcome of any such matters, other than with respect to the
Insurance Regulatory Condition and compliance with the requirements of the
Hart-Scott-Rodino Antitrust Improvements Act (see subparagraphs (a) and (c)
below), there can be no assurance that any license, permit, consent, approval or
other action, if needed, would be obtained without substantial conditions or
that adverse consequences might not result to the Company's business or that
certain parts of the Company's business might not have to be disposed of or held
separate or other substantial conditions complied with in the event that such
license, permit or approval is not obtained or any such other action is not
taken. The Purchasers' obligation under the Offer to accept for payment and pay
for Shares is subject to certain conditions, including conditions relating to
the legal matters discussed in this Section 11 and, if certain types of adverse
action are taken with respect to the matters discussed below, the Purchasers
could decline to accept for payment any Shares tendered. See THE
OFFER -- Section 10.
 
     (a) State Insurance Approvals.  The Company is an insurance holding company
whose insurance company subsidiaries and affiliates are domiciled in Colorado,
Wisconsin, California, Oklahoma and Texas. Orion is deemed to be the ultimate
parent of those insurance company subsidiaries and affiliates. The Insurance
Holding Company System Act of some of those states requires Orion to file
information with the insurance commissioner in order to obtain approval of the
acquisition of additional voting securities of a domestic insurer (including an
insurance holding company). In some states the Insurance Codes (the "Insurance
Codes") require a Form A filing. The Insurance Codes of those states include a
presumption of control arising from the ownership, directly or indirectly of 10%
or more of the insurer's voting securities. In certain states, the Form A filing
triggers public hearing requirements and/or statutory periods within which the
Commissioner shall approve or disapprove the acquisition of control. In other
states, public hearings are discretionary and/or there are no periods within
which such decisions must be rendered. The periods within which hearings must be
commenced or decisions rendered do not begin until the relevant Insurance
Department has deemed the filing of the Form A complete.
 
     The Purchasers have advised the insurance departments of California,
Colorado, Connecticut, Oklahoma, Texas and Wisconsin of their intention to
commence the Offer. Form A filings will be made in California and Wisconsin, and
a Form E filing will be made in Texas, seeking approval of the acquisition of
the Shares. If the purchase of Shares is effected pursuant to the Offer, the
Company's Oklahoma insurance subsidiary will amend its Oklahoma Form B filing to
reflect the acquisition of Shares by the Purchasers. The Purchasers, other than
Orion, are Connecticut-domiciled insurance companies. The Connecticut Insurance
Code requires
 
                                       29
<PAGE>   32
 
a domestic insurer to give prior notice to the insurance department of its
intention to invest in an affiliate in an amount which equals the lesser of
three percent of the insurance company's admitted assets or twenty-five percent
of its policyholder surplus and obtain the insurance department's prior approval
of the investment.
 
     On May 1, 1996 the Purchasers advised the Connecticut Insurance Department
of their intent to make the Offer and the number of Shares to be purchased by
each Purchaser.
 
     If the Purchasers are unable to receive or are delayed in receiving the
approval of any Insurance Department or are required to receive approvals from
any other state authorities, the Purchasers might be unable to accept for
payment or pay for Shares tendered pursuant to the Offer, or be delayed in
continuing or purchasing Shares pursuant to the Offer. In such case, Purchasers
may not be obligated to accept for payment or pay for Shares. In addition, the
Purchasers may terminate the Offer if a Purchaser becomes subject to an order
preventing it from purchasing Shares or limiting its ability to exercise control
of the Company or any of its subsidiaries or affiliates or if in its judgment
necessary approvals have not been obtained. See THE OFFER -- Section 10.
 
     (b) State Takeover Statutes.  A number of states have adopted laws and
regulations that purport to be applicable to offers to acquire shares of
corporations that are incorporated or have substantial assets, stockholders
and/or a principal place of business in such states. In Edgar v. MITE Corp., the
U.S. Supreme Court held that the Illinois Business Takeover Statute, which
involved state securities laws which made the takeover of certain corporations
more difficult, imposed a substantial burden on interstate commerce and was
therefore unconstitutional. However, in 1987 the U.S. Supreme Court held in CTS
Corp. v. Dynamics Corp. of America, that, at least under certain circumstances,
the U.S. Constitution permits a state, as a matter of corporate law and, in
particular, those laws concerning corporate governance, to disqualify a
potential acquiror from voting on the affairs of a target corporation without
prior approval of the remaining stockholders. Subsequently, a number of Federal
courts ruled that various state takeover statutes were unconstitutional insofar
as they apply to corporations incorporated outside the state of enactment. Orion
believes that no such statute purporting to be applicable to offers to acquire
shares of a corporation has been enacted or is in effect in Colorado, the state
of incorporation of the Company.
 
     The Company and certain of its subsidiaries directly or indirectly conduct
business in a number of other states throughout the United States, some of which
have enacted takeover laws and regulations. Orion does not know whether any of
these laws will, by its terms, apply to the Offer. The Offer is being made
without compliance by the Purchasers with any such state takeover statutes that
may purport to apply to the Offer. Should any governmental official or other
person seek to apply any such statute or regulation to the Offer, the Purchasers
will take such action as then appears desirable, and presently anticipate that
they would contest the applicability or validity of any such statute or
regulation in appropriate court proceedings. If it is asserted that one or more
state takeover statutes are applicable to the Offer, and an appropriate court
does not determine that such statutes are inapplicable or invalid as applied to
the Offer, the Purchasers might be unable to accept for payment or pay for
Shares tendered pursuant to the Offer, or be delayed in accepting or purchasing
Shares pursuant to the Offer. In such case, the Purchasers will not be obligated
to accept for payment or pay for Shares. In addition, the Purchasers may
terminate the Offer if any of them becomes subject to an order preventing it
from purchasing Shares or limiting its ability to exercise control of the
Company. See THE OFFER -- Section 10.
 
     (c) Antitrust
 
     Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended
(the "HSR Act"), and the rules promulgated thereunder, certain acquisition
transactions may not be consummated unless information has been furnished to the
Federal Trade Commission (the "FTC") and the Antitrust Division of the
Department of Justice (the "Antitrust Division") and applicable waiting period
requirements have been satisfied. Pursuant to the requirements of the HSR Act,
on May 8, 1996, Orion filed a Notification and Report Form with respect to the
acquisition of more than 50% of the equity of the Company with the FTC and the
Antitrust Division. Under the provisions of the HSR Act applicable to the Offer,
the purchase of Shares under the Offer may not be consummated until the
expiration of a 15 calendar-day waiting period following the filing
 
                                       30
<PAGE>   33
 
by Orion. Accordingly, the waiting period with respect to the Offer will expire
at 11:59 p.m., New York City time, on May 23, 1996, unless Orion receives a
request for additional information or documentary material, or the Antitrust
Division and the FTC terminate the waiting period prior thereto. If, within such
15-day period, either the Antitrust Division or the FTC requests additional
information or material from Orion concerning the Offer, the waiting period will
be extended and would expire at 11:59 p.m., New York City time, on the tenth
calendar day after the date of substantial compliance by Orion with such
request. Only one extension of the waiting period pursuant to a request for
additional information is authorized by the HSR Act. Thereafter, such waiting
period may be extended only by court order or with the consent of Orion; Orion
reserves the right to consent or not in its sole discretion. The Purchasers will
not accept for payment Shares tendered pursuant to the Offer unless and until
the waiting period requirements imposed by the HSR Act with respect to the Offer
have been satisfied.
 
     The FTC and the Antitrust Division frequently scrutinize the legality under
the antitrust laws of transactions such as the Purchasers' proposed acquisition
of Shares pursuant to the Offer. At any time before or after the Purchasers'
purchase of Shares, the FTC or the Antitrust Division could take such action
under the antitrust laws as it deems necessary or desirable in the public
interest, including seeking to enjoin the purchase of Shares pursuant to the
Offer or seeking the divestiture of Shares purchased by the Purchasers or the
divestiture of substantial assets of any Purchaser or any of its subsidiaries or
affiliates or of the Company or its subsidiaries. While there can be no
assurance that a challenge to the Offer on antitrust grounds will not be made
or, if such challenge is made, of the result, Orion does not believe that
consummation of the Offer will result in violation of any applicable antitrust
laws. In the event any legal action or administrative proceeding by the United
States or an agency thereof challenging the Offer under the federal antitrust
laws are threatened or instituted, the Purchasers will not be obligated to
accept for payment or pay for any tendered Shares and may terminate the Offer.
In addition, the Purchasers may terminate the Offer if the Purchasers become
subject to an order preventing the purchase of Shares or limiting the
Purchasers' ability to exercise control of the Company. See THE OFFER -- Section
10.
 
     (d) Mergers and Business Combinations.  As described under INTRODUCTION and
SPECIAL FACTORS -- "Purpose of the Transaction; Plans for the Company After the
Offer," the Purchasers reserve the right, to the extent permitted by applicable
law, to acquire additional Shares following the expiration or termination of the
Offer. Such acquisitions may be made through open market purchases, privately
negotiated transactions, a tender offer or exchange offer, or otherwise, on such
terms and at such prices as the Purchaser shall determine. Each Purchaser also
reserves the right to dispose of any or all Shares which it owns. The
acquisition of Shares by the Purchasers may be subject to compliance with the
requirements of Rule 13e-3 promulgated under the Exchange Act, which applies to
certain "going-private" transactions. Notwithstanding the foregoing, the
Purchasers have no present intention of proposing a merger or other business
combination transaction with the Company. If Orion were to consummate a merger
or similar business combination, or seek to undertake certain other actions, the
stockholders of the Company might have the right to dissent from, and obtain
payment for the fair value of their Shares in accordance with Colorado law.
Statutory appraisal rights are not available under Colorado law with respect to
the Offer.
 
     Several decisions by Delaware courts have held that, in certain instances,
a controlling stockholder of a corporation involved in a merger has a fiduciary
duty to the other stockholders that requires that the merger be fair to such
other stockholders. In determining whether a merger is fair to minority
stockholders, the Delaware courts have considered, among other things, the type
and amount of consideration to be received by the stockholders and whether there
were fair dealings among the parties. The Delaware Supreme Court indicated in
Weinberger v. UOP, Inc. that, in most cases, the remedy available in a merger
that is found not to be "fair" to minority stockholders is the right to
appraisal or a damages remedy.
 
     (e) Credit Agreement.  The Company has entered into a Credit Agreement
dated June 2, 1995 with bank lenders, providing for an unsecured $110,000,000
reducing revolving credit facility. As of March 31, 1996, there were borrowings
outstanding under the Credit Agreement in the aggregate amount of $100,000,000.
The Credit Agreement provides that it shall be an Event of Default if the Shares
are deregistered under the Exchange Act, entitling the lenders to accelerate the
full amount of the borrowings. See THE OFFER -- Section 6. Orion does not expect
deregistration to occur as a result of the Offer. Should
 
                                       31
<PAGE>   34
 
deregistration occur, Orion expects to be able to obtain a waiver with respect
to such default under the Credit Agreement from the lenders.
 
     (f) The Company's Charter Documents; The Shareholder Agreement; the Rights
Plan and Other Matters.  The Company's Articles of Incorporation, as amended and
restated, authorize the Company's Board of Directors to set the terms of, and
provide for the issuance of, one or more series of preferred stock without the
vote of the Company's existing stockholders. In the event that the Board of
Directors of the Company authorizes the issuance by the Company of preferred
stock upon terms that would render consummation of the Offer impracticable or
undesirable to the Purchasers, the Purchasers will have no obligation to accept
for payment or pay for any Shares pursuant to the Offer. Pursuant to the
Shareholder Agreement, three members of the present Board of Directors of the
Company have been designated by Orion. The Company's Board of Directors consists
of eleven members.
 
     In November 1991, the Board of Directors of the Company approved the
adoption of a Shareholder Rights Agreement and in connection therewith declared
a dividend distribution of one Right for each outstanding share of Common Stock
until such time as separate Right certificates are distributed or the Rights are
redeemed or expire. When exercisable, each Right will entitle a holder to
purchase from the Company a unit consisting of one one-hundredth of a share of a
new series of the Company's Preferred Stock at a purchase price of $60 per
share. The Rights become exercisable ten days following a public announcement
that a person or group of acquirers (other than "Exempt Persons") has acquired
or obtained the rights to acquire beneficial ownership of 20% or more of the
Company's common stock or ten business days following announcement of a tender
offer or exchange offer that could result in beneficial ownership of 20% or more
of the Company's common stock. Prior to consummation of such a transaction, each
holder of a Right is entitled to purchase shares of the Company's common stock
having a value equal to two times the exercise price of the Right. The Company
has the right to redeem the Rights at $.01 per Right prior to the time they
become exercisable. The Rights will expire on December 30, 2001. In accordance
with the form of Rights Agreement included in the Company's Current Report on
Form 8-K filed with the Commission on December 19, 1991, Orion and its
subsidiaries are "Exempt Persons" as defined in the Agreement. Orion does not
believe that at the present time the Rights are exercisable or that the Offer
will result in the Rights becoming exercisable.
 
     12. FEES AND EXPENSES.  Orion on behalf of the Purchasers has retained
State Street Bank and Trust Company to act as Depositary in connection with the
Offer. The Depositary will receive reasonable and customary compensation for its
services. D.F. King & Co., Inc. has been retained by Orion on behalf of the
Purchasers as Information Agent in connection with the Offer. The Information
Agent may contact holders of Shares by mail, telephone, telex, telegraph and
personal interview and may request brokers, dealers and other nominee
stockholders to forward material relating to the Offer to beneficial owners.
Reasonable and customary compensation will be paid for such services. Donaldson,
Lufkin & Jenrette Securities Corporation ("DLJ") is acting as Dealer Manager in
connection with the Offer. Orion on behalf of the Purchasers has agreed to pay
DLJ a fee of $200,000 for such services. In July 1995, DLJ acted as co-manager
for Orion's $100,000,000 Senior Note offering. Orion on behalf of the Purchasers
has also agreed to reimburse the Depositary, the Dealer Manager and the
Information Agent for reasonable out-of-pocket expenses and to indemnify each of
them against certain liabilities and expenses, including, in the case of the
Dealer Manager and Information Agent, certain liabilities under the federal
securities laws.
 
                                       32
<PAGE>   35
 
     It is estimated that the expenses incurred by Orion in connection with the
Offer will be approximately as set forth below (if all of the Shares other than
those held by Orion's wholly-owned subsidiaries are purchased):
 
<TABLE>
    <S>                                                                         <C>
    Filing fees...............................................................  $  61,100
    Printing and mailing fees.................................................    100,000
    Accounting and legal fees.................................................    300,000
    Dealer Manager fee........................................................    200,000
    Depositary fees...........................................................     25,000
    Miscellaneous.............................................................     63,900
                                                                                ----------
                                                                                $ 750,000
                                                                                ==========
</TABLE>
 
     None of the foregoing fees will be paid by the Company.
 
     Except as set forth herein, the Purchasers will not pay any fees or
commissions to any broker or dealer or to any other person in connection with
the solicitation of tenders of Shares pursuant to the Offer. Brokers, dealers,
commercial banks and trust companies will be reimbursed for customary mailing
and handling expenses incurred by them in forwarding material to their
customers. Except as set forth in this Offer to Purchase, no persons or classes
of persons have been employed or retained or are to be compensated by the Orion
or by any person on behalf of the Purchasers, to make solicitations or
recommendations in connection with the Offer, and no officer, employee or class
of employees or corporate asset of the Company has been or is proposed to be
employed, availed or utilized by Orion in connection with the Offer.
 
     13. MISCELLANEOUS.  The Offer is not being made to, nor will tenders be
accepted from, or on behalf of, holders of Shares in any jurisdiction in which
the making of the Offer or the acceptance thereof would not be in compliance
with the securities, blue sky or other laws of such jurisdiction. However, the
Purchasers may, at their discretion, take such action as they may deem necessary
to make the Offer in any such jurisdiction and extend the Offer to holders of
Shares in such jurisdiction. In those jurisdictions whose securities laws
require the Offer to be made by a licensed broker or dealer, the Offer shall be
deemed to be made on behalf of the Purchasers, if at all, only by the Dealer
Manager or by one or more registered brokers or dealers licensed under the laws
of such jurisdictions.
 
     The Purchasers have filed with the Commission a Tender Offer Statement on
Schedule 14D-1 and a Transaction Statement on Schedule 13E-3, together with
exhibits, pursuant to Rules 13e-3 and 14d-3 respectively of the General Rules
and Regulations under the Exchange Act, furnishing certain additional
information with respect to the Offer, and may file amendments thereto. Such
Schedules 13E-3 and 14D-1 and any amendments thereto, including exhibits, may be
examined at, and copies may be obtained from, the Commission (but not the
regional offices of the Commission) in the manner set forth in THE OFFER --
Section 7.
 
                                       33
<PAGE>   36
 
     No person has been authorized to give any information or make any
representation on behalf of the Purchasers not contained in this Offer to
Purchase or the Letter of Transmittal, and, if given or made, such information
or representation must not be relied upon as having been authorized.
 
                                         ORION CAPITAL CORPORATION
 
                                                   and
 
                                         THE CONNECTICUT INDEMNITY COMPANY
                                         CONNECTICUT SPECIALTY INSURANCE
                                         COMPANY
                                         DESIGN PROFESSIONALS INSURANCE COMPANY
                                         EBI INDEMNITY COMPANY
                                         EMPLOYEE BENEFITS INSURANCE COMPANY
                                         THE FIRE AND CASUALTY INSURANCE
                                         COMPANY OF CONNECTICUT
                                         SECURITY INSURANCE COMPANY OF HARTFORD 
May 8, 1996
 
                                       34
<PAGE>   37
 
                                                                      SCHEDULE I
 
                      DIRECTORS AND EXECUTIVE OFFICERS OF
                                 THE PURCHASERS
 
     Set forth below are the name, business address, position with Orion Capital
Corporation, a Delaware corporation ("Orion"), and/or one of the wholly-owned
subsidiaries of Orion which are purchasing Shares in the Offer ("Subsidiaries"),
present principal occupation or employment and five-year employment history of
each director and executive officer of Orion and/or the Subsidiaries. Each of
the Subsidiaries listed in footnotes 2-8 below is a Connecticut corporation.
Each person listed below is a citizen of the United States except Mr. Graham A.
Addington who is a citizen of the United Kingdom. Except as indicated in this
Schedule, none of the persons listed below beneficially owns Shares or is a
director of Guaranty National Corporation. Unless otherwise indicated, each
occupation set forth opposite an individual's name refers to employment with
Orion or the designated Subsidiaries. All officers serve at the pleasure of the
Board of Directors of the entity named.
 
<TABLE>
<CAPTION>
                                                  PRESENT PRINCIPAL OCCUPATION OR
                                                   EMPLOYMENT/MATERIAL POSITIONS
          NAME AND ADDRESS                        HELD DURING THE PAST FIVE YEARS
<S>                                    <C>
 
W. Marston Becker (1-8)                Vice Chairman of the Board of Orion, CI, CSIC, EBIC,
Design Professionals                   EIC, F&C and SICH since March 8, 1996; President and
Insurance Company                      Chief Executive Officer of DPIC Companies, Inc. ("DPIC
2959 Monterey-Salinas Highway          Companies"), a subsidiary of Orion, since July 1994;
Monterey, CA 93940                     Senior Vice President of Orion from July 1994 to March
                                       1996; President and Chief Executive Officer of
                                       McDonough Caperton Insurance Group, an insurance
                                       brokerage firm, from March 1987 to July 1994.
Bertram J. Cohn(1)                     Managing Director, First Manhattan Company (investment
437 Madison Avenue, 30th Floor         bankers), 1982-present.
New York, NY 10022
John C. Colman(1)                      Private investor and consultant.
4 Briar Lane
Glencoe, IL 60022
Alan R. Gruber (1-8)                   Chairman of the Board and Chief Executive Officer of
Orion Capital Corporation              Orion, 1976-present. Chairman of the Board of CI,
600 Fifth Avenue                       CSIC, DPIC, EBIC, EIC, F&C and SICH. Director:
New York, NY 10020                     Guaranty National Corporation.
Larry D. Hollen (1-8)                  President and Chief Operating Officer of Orion,
Orion Capital Corporation              President of CI, EIC, F&C and SICH and Vice Chairman
9 Farm Springs Drive                   of DPIC and EBIC since March 1, 1994; Vice Chairman of
Farmington, CT 06032                   CSIC since June 9, 1994, Executive Vice President and
                                       Assistant Chief Operating Officer of Orion from
                                       December 1, 1992 to February 28, 1994 and Senior Vice
                                       President from 1990 to 1992. President of EBI
                                       Companies, Inc. ("EBI Companies"), a wholly-owned
 
- ---------------
 
  
  (1) Director of Orion
  (2) Director of the Connecticut Indemnity Company ("CI")
  (3) Director of Design Professionals Insurance Company ("DPIC")
  (4) Director of Connecticut Specialty Insurance Company ("CSIC")
  (5) Director of Employee Benefits Insurance Company ("EBIC")
  (6) Director of EBI Indemnity Company ("EIC")
  (7) Director of The Fire and Casualty Insurance Company of Connecticut ("F&C")
  (8) Director of Security Insurance Company of Hartford ("SICH")
</TABLE>
 
                                       I-1
<PAGE>   38
 
<TABLE>
<CAPTION>
                                                  PRESENT PRINCIPAL OCCUPATION OR
                                                   EMPLOYMENT/MATERIAL POSITIONS
          NAME AND ADDRESS                        HELD DURING THE PAST FIVE YEARS
<S>                                    <C>
                                       subsidiary of Orion, from January 1990 to May 31,
                                       1993. Director: Guaranty National Corporation.
Robert H. Jeffrey(1)                   Chairman of the Board, Jeflion Investment Company,
The Jeffrey Company                    1994-present, President from 1974 to 1994; Chairman of
8 E. Broad Street, Suite 1560          the Board, The Jeffrey Company (a privately held
Columbus, OH 43215                     investment company which is the parent of Jeflion
                                       Investment Company), 1994-present, President from 1973
                                       to 1994.
Warren R. Lyons(1)                     Chairman, Avco Financial Services (a financial
Avco Financial Services                services company and a subsidiary of Textron Inc.),
600 Anton Boulevard                    August 1995-present, President from 1989 to July 1995.
Costa Mesa, CA 92628C
James K. McWilliams(1)                 Proprietor of McWilliams & Company and general partner
McWilliams & Company                   of McWilliams Associates (investment counselors),
2288 Broadway, #8                      1967-present; General Partner, Mt. Eden Vineyards,
San Francisco, CA 94115                Inc., 1986-present.
Ronald W. Moore(1)                     Adjunct Professor of Business Administration, Graduate
Morgan Hall                            School of Business Administration, Harvard University,
Soldiers Field                         1990-present.
Boston, MA 02163
Robert B. Sanborn(1)                   Senior Executive Consultant to Orion since March 1,
Orion Capital Corporation              1995; Vice Chairman of the Board of Orion from March
9 Farm Springs Drive                   1, 1994 to February 28, 1995; President and Chief
Farmington, CT 06032                   Operating Officer of Orion from 1987 to 1994; Chairman
                                       of the American Insurance Association (a property and
                                       casualty insurance company trade group) from January
                                       1993 to January 1994. Director: Guaranty National
                                       Corporation.
William J. Shepherd(1)                 Private investor; Chairman, Chemical New Jersey
109 Golf Edge                          Holdings (a bank holding company), 1990-1991,
Westfield, NJ 07090                    Chairman, Chemical Bank New Jersey (a commercial
                                       bank), 1989-1991; Chairman, Princeton Bank and Trust
                                       Company (a commercial bank), 1989-1991. Director:
                                       Guaranty National Corporation.
John R. Thorne(1)                      Morgenthaler Professor of Entrepreneurship, Graduate
Furnace Run                            School of Industrial Administration of Carnegie Mellon
Laughlintown, PA 15655                 University, 1986-present; Chairman, The Enterprise
                                       Corporation of Pittsburgh (a private, non-profit
                                       corporation encouraging and supporting entrepreneurial
                                       businesses), 1983-present; a general partner of
                                       Pittsburgh Venture Partners, the general partner of
                                       the Pittsburgh Seed Fund (a private venture capital
                                       fund), 1985-present.
Roger B. Ware(1)                       President and Chief Executive Officer of Guaranty
Guaranty National Corporation          National Corporation (a property and casualty
9800 South Meridian Boulevard          insurance company), 1983-present; Senior Vice
Englewood, CO 80112                    President of Orion from 1988 to November 1991.
                                       Director: Guaranty National Corporation.
</TABLE>
 
- ---------------
 
<TABLE>
<S>                                    <C>
(1) Director of Orion
</TABLE>
 
                                       I-2
<PAGE>   39
 
<TABLE>
<CAPTION>
                                                  PRESENT PRINCIPAL OCCUPATION OR
                                                   EMPLOYMENT/MATERIAL POSITIONS
          NAME AND ADDRESS                        HELD DURING THE PAST FIVE YEARS
<S>                                    <C>
Raymond W. Jacobsen(3,5,6)             Senior Vice President of Orion since July 1994;
Orion Capital Corporation              Chairman of the EBI Companies since March 29, 1996,
9 Farm Springs Drive                   President and Chief Executive Officer from June 1,
Farmington, CT 06032                   1993 to March 1996; President and Chief Executive
                                       Officer of CSIC since October 17, 1995; and Senior
                                       Vice President of CI, DPIC, EIC, F&C and SICH since
                                       March, 1990; Vice President of Orion from March 1990
                                       to July 1994; Executive Vice President of the EBI
                                       Companies from December 1989 to May 31, 1993.
Daniel L. Barry(2-8)                   Chief Financial Officer of Orion since March 29, 1996,
Orion Capital Corporation              Vice President and Controller since October 1987; Vice
9 Farm Springs Drive                   Chairman of Security Reinsurance Company and
Farmington, CT 06032                   SecurityRe, Inc., subsidiaries of Orion, since 1989,
                                       Chief Financial Officer since March 29, 1996; Senior
                                       Vice President and Controller of CI, CSIC, DPIC, EBIC,
                                       EIC, F&C, and SICH since 1989, Chief Financial Officer
                                       since March 29, 1996.
Michael P. Maloney(2-4 & 6-8)          Vice President, General Counsel and Secretary of Orion
Orion Capital Corporation              since August 1979; Senior Vice President and Assistant
600 Fifth Avenue                       Secretary of each of the Subsidiaries since March
New York, NY 10020                     1987.
William G. McGovern                    Vice President and Chief Actuary of Orion since March
Orion Capital Corporation              1990; Senior Vice President and Chief Actuary of each
9 Farm Springs Drive                   of the Subsidiaries since October 1989.
Farmington, CT 06032
Vincent T. Papa(2-4 & 6-8)             Vice President and Treasurer of Orion since June 1985;
Orion Capital Corporation              Chairman of Wm. H. McGee & Co., Inc., a wholly-owned
600 Fifth Avenue                       subsidiary of Orion, since September 30, 1995; Senior
New York, NY 10020                     Vice President of each of the Subsidiaries since March
                                       1987, Treasurer from December 1990 to March 1996.
Raymond J. Schuyler(8)                 Vice President-Investments of Orion since June 1984;
Orion Capital Corporation              Senior Vice President-Investments of each of the
600 Fifth Avenue                       Subsidiaries since March 1986.
New York, NY 10020
Jonathan H. Gice(5)                    President of EBIC and EBI Companies, Inc. since March
EBI Companies, Inc.                    29, 1996; Vice President of EIC, SICH, CI and F&C
325 N. Corporate Drive                 since 1991; Executive Vice President of EBIC and EBI
Suite 100                              Companies, Inc. from November 1994 to March 29, 1996,
Milwaukee, WI 53045                    Senior Vice President from April 1993 to November
                                       1994, Vice President from 1991 to April 1993.
</TABLE>
 
- ---------------
 
<TABLE>
<S>                                    <C>
(2) Director of CI
  (3) Director of CSIC
  (4) Director of DPIC
  (5) Director of EBIC
  (6) Director of EIC
  (7) Director of F&C
  (8) Director of SICH
</TABLE>
 
                                       I-3
<PAGE>   40
 
<TABLE>
<CAPTION>
                                                  PRESENT PRINCIPAL OCCUPATION OR
                                                   EMPLOYMENT/MATERIAL POSITIONS
          NAME AND ADDRESS                        HELD DURING THE PAST FIVE YEARS
<S>                                    <C>
Eva Schlehofer(2 & 5-7)                Senior Vice President of each of the Subsidiaries
Orion Capital Companies, Inc.          since March 1994; Vice President of EIC, EBIC, CI, and
9 Farm Springs Drive                   F&C from 1991 to March 1994.
Farmington, CT 06032
Stanley G. Fullwood(2-8)               Vice President, General Counsel and Secretary of Orion
Orion Capital Companies, Inc.          Capital Companies, Inc., a subsidiary of Orion, and
9 Farm Springs Drive                   each of the Subsidiaries since 1988.
Farmington, CT 06032
Craig A. Nyman                         Vice President of Orion Capital Companies, Inc. and
Orion Capital Companies, Inc.          each of the Subsidiaries since 1991, Treasurer since
9 Farm Springs Drive                   March 29, 1996 and Assistant Treasurer from 1991 to
Farmington, CT 06032                   March 1996.
Graham A. Addington                    Senior Vice President of DPIC since March 1995; Chief
Security Insurance Company of          Agent in Canada of SICH since December 1994; Vice
  Hartford                             President of SICH since 1991.
155 University Avenue
Suite 702
Toronto, Ontario M5H 3B7 Canada
A. Russell Chaney                      Senior Vice President of DPIC and DPIC Companies since
Design Professionals                   1991.
Insurance Company
2959 Monterey-Salinas Highway
Monterey, CA 93940
Richard D. Crowell                     Senior Vice President of DPIC since March 7, 1996.
Design Professionals                   Senior Vice President of DPIC Companies from August
Insurance Company                      1995 to March 1996; self employed consultant from 1991
2959 Monterey-Salinas Highway          to 1993.
Monterey, CA 93940
William M. Demmon                      Senior Vice President of DPIC since October 1993; Vice
Design Professionals                   President of SICH since March 1994. Assistant Vice
Insurance Company                      President of DPIC Companies from 1991 to 1993.
2959 Monterey-Salinas Highway
Monterey, CA 93940
Ralph M. Hermann                       Senior Vice President of EIC, EBIC, CI and F&C since
EBI Companies, Inc.                    March 29, 1996, Vice President from 1991 to March
325 N. Corporate Drive                 1996.
Milwaukee, WI 53045
</TABLE>
 
- ---------------
 
<TABLE>
<S>                                    <C>
(2) Director of CI
  (3) Director of CSIC
  (4) Director of DPIC
  (5) Director of EBIC
  (6) Director of EIC
  (7) Director of F&C
  (8) Director of SICH
</TABLE>
 
                                       I-4
<PAGE>   41
 
<TABLE>
<CAPTION>
                                                  PRESENT PRINCIPAL OCCUPATION OR
                                                   EMPLOYMENT/MATERIAL POSITIONS
          NAME AND ADDRESS                        HELD DURING THE PAST FIVE YEARS
<S>                                    <C>
Paul E. McCarthy                       Senior Vice President of DPIC and President of
Peninsula Excess Insurance             Peninsula Excess Insurance Brokers, Inc. ("PenEx"), a
Brokers, Inc.                          subsidiary of Orion, since December 1995, Executive
1640 Powers Ferry Road                 Vice President of PenEx from January 1995 to December
Building 5, Suite 250                  1995. Affiliated with McCarthy & Associates,
Marietta, GA 30067                     underwriting consultants, 1993-1994, and Capital
                                       Special Risks, Inc., a wholesale insurance brokerage
                                       firm, 1991-1992.
Thomas M. Okarma                       Senior Vice President -- Chief Claims Officer of DPIC
Design Professionals                   since December 1995. Associated with AVA Insurance
Insurance Company                      Agency, Inc. an Illinois insurance agency specializing
2959 Monterey-Salinas Highway          in professional liability, 1984-November 1995.
Monterey, CA 93940
David J. Vermeulen                     Senior Vice President of DPIC since 1991; Vice
Design Professionals                   President of SICH since March 1994.
Insurance Company
2959 Monterey-Salinas Highway
Monterey, CA 93940
Florence E. Whitmire                   Senior Vice President of DPIC since October 1993, Vice
Design Professionals                   President from 1991 to September 1993; Vice President
Insurance Companies                    of SICH since March 1994.
2959 Monterey-Salinas Highway
Monterey, CA 93940
</TABLE>
 
                                       I-5
<PAGE>   42
 
     Facsimile copies of the Letter of Transmittal will be accepted. The Letter
of Transmittal, certificates for Shares, and any other required documents should
be sent or delivered by each stockholder or his broker, dealer, commercial bank,
trust company or other nominee to the Depositary, at one of the addresses set
forth below.
 
                               The Depositary is:
 
                      STATE STREET BANK AND TRUST COMPANY
 
<TABLE>
<S>                             <C>                             <C>
           By Mail:                      By Courier:                       By Hand:
      State Street Bank               State Street Bank                 Bank of Boston
      and Trust Company               and Trust Company              c/o Boston Equiserve
   Corporate Reorganization        Corporate Reorganization        Corporate Reorganization
        P.O. Box 9061                  2 Heritage Drive                  55 Broadway
    Boston, MA 02205-8686           North Quincy, MA 02171                3rd Floor
                                                                   New York, New York 10006
</TABLE>
 
                                 By Facsimile:
                                 (617) 774-4519
 
                             Confirm by telephone:
                                 (617) 774-4511
 
     Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
specified below. Additional copies of the Offer to Purchase, the Letter of
Transmittal and the Notice of Guaranteed Delivery may be obtained from the
Information Agent. A stockholder may also contact his broker, dealer, commercial
bank or trust company for assistance concerning the Offer.
 
                           The Information Agent is:
 
                             D.F. KING & CO., INC.
 
<TABLE>
<S>                             <C>                             <C>
                                       77 Water Street
                                      New York, NY 10005
                                        (212) 269-5550
                                        (Call Collect)
</TABLE>
 
                                       or
 
                         Call Toll Free (800) 829-6551.
 
                      The Dealer Manager for the Offer is:
                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
                                277 Park Avenue
                            New York, New York 10172
                         (212) 892-7700 (Call Collect)
 
                                       I-6

<PAGE>   1
 
                             LETTER OF TRANSMITTAL
 
                        TO TENDER SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)
 
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
 
                       PURSUANT TO THE OFFER TO PURCHASE
                               DATED MAY 8, 1996
 
                                       BY
 
                           ORION CAPITAL CORPORATION
 
                  AND CERTAIN OF ITS WHOLLY-OWNED SUBSIDIARIES
 
        THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE AT
        12:00 MIDNIGHT, NEW YORK CITY TIME, ON WEDNESDAY, JUNE 5, 1996,
                         UNLESS THE OFFER IS EXTENDED.
 
                    To: State Street Bank and Trust Company
                                   Depositary:
 
<TABLE>
<S>                                <C>                                <C>
            By Mail:                     By Overnight Courier:                    By Hand:
   State Street Bank and Trust        State Street Bank and Trust              Bank of Boston
             Company                            Company                     c/o Boston Equiserve
    Corporate Reorganization           Corporate Reorganization            55 Broadway, 3rd Floor
         P. O. Box 9061                    2 Heritage Drive                  New York, NY 10006
      Boston, MA 02205-8686             North Quincy, MA 02171
</TABLE>
 
                      Facsimile Transmission Copy Number:
                                 (617) 774-4519
 
                            Confirm by telephone to:
                                 (617) 774-4511
 
DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
      ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER
      THAN THE ONE LISTED ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.
 
     This Letter of Transmittal is to be completed by stockholders either if
certificates for Shares (as defined in the Offer to Purchase dated May 8, 1996
(the "Offer to Purchase")) are to be forwarded herewith or, unless an Agent's
Message (as defined in the Offer to Purchase) is utilized, if tenders are to be
made by book-entry transfer to the account maintained by the Depositary at The
Depository Trust Company or The Philadelphia Depository Trust Company (each, a
"Book-Entry Transfer Facility") pursuant to the procedures set forth in Section
3 of the Offer to Purchase. Stockholders who tender Shares by book-entry
transfer are referred to herein as "Book Entry Stockholders" and other
stockholders are referred to herein as "Certificate Stockholders." Stockholders
whose certificates are not immediately available or who cannot deliver their
certificates (or who cannot comply with the book-entry transfer procedures on a
timely basis) and all other documents required hereby to the Depositary at or
prior to the Expiration Date (as defined in the Offer to Purchase) may tender
their Shares according to the guaranteed delivery procedure set forth in Section
3 of the Offer to Purchase. See Instruction 2. DELIVERY OF DOCUMENTS TO A
BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE A DELIVERY TO THE DEPOSITARY.
<PAGE>   2
 
/ / CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
    MADE TO THE ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY TRANSFER
    FACILITY AND COMPLETE THE FOLLOWING:
 
       Name of Tendering Institution
       -------------------------------------------------------------------------
       Check Box of Applicable Book-Entry Transfer Facility:
 
            / / The Depository Trust Company
 
            / / The Philadelphia Depository Trust Company
 
       Account Number
       -------------------------------------------------------------------------
       Transaction Code Number
       -------------------------------------------------------------------------
 
/ / CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
    GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE
    FOLLOWING:
 
       Name(s) of Registered Holder(s)
       -------------------------------------------------------------------------
 
       Date of Execution of Notice of Guaranteed Delivery
            --------------------------------------------------------------------
 
       Name of Institution which Guarantees Delivery
       -------------------------------------------------------------------------
 
                          SPECIAL TENDER INSTRUCTIONS
 
     Shareholders may wish, for tax planning purposes, to designate the specific
order in which they desire their shares to be accepted for payment in the event
of proration. Each shareholder is urged to consult his tax advisor with respect
to such considerations.
 
- --------------------------------------------------------------------------------
                         DESCRIPTION OF SHARES TENDERED
 
<TABLE>
<S>                                                                      <C>               <C>               <C>
- ------------------------------------------------------------------------------------------------------------------------------
             NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)                            CERTIFICATE(S) TENDERED
                       (PLEASE FILL IN, IF BLANK)                           (ATTACH ADDITIONAL SIGNED SCHEDULE IF NECESSARY)
- ------------------------------------------------------------------------------------------------------------------------------
                                                                                              TOTAL NUMBER
                                                                                               OF SHARES         NUMBER OF
                                                                            CERTIFICATE      REPRESENTED BY        SHARES
                                                                             NUMBER(S)      CERTIFICATE(S)*      TENDERED**
                                                                         ------------------------------------------------------
                                                                         ------------------------------------------------------
                                                                         ------------------------------------------------------
                                                                         ------------------------------------------------------
                                                                         ------------------------------------------------------
                                                                         ------------------------------------------------------
                                                                            Total Shares
- ------------------------------------------------------------------------------------------------------------------------------
  * Need not be completed by Book-Entry Stockholders.
 ** Unless otherwise indicated, it will be assumed that all Shares evidenced by any certificate delivered to the Depositary are
    being tendered. See Instruction 4.
</TABLE>
 
- --------------------------------------------------------------------------------
<PAGE>   3
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
LADIES AND GENTLEMEN:
 
     The undersigned hereby tenders to Orion Capital Corporation, a Delaware
corporation ("Orion"), on its behalf and on behalf of The Connecticut Indemnity
Company, Connecticut Specialty Insurance Company, Design Professionals Insurance
Company, EBI Indemnity Company, Employee Benefits Insurance Company, The Fire
and Casualty Insurance Company of Connecticut and Security Insurance Company of
Hartford, certain of its wholly-owned subsidiaries (Orion Capital Corporation
and such subsidiaries being collectively referred to herein as the
"Purchasers"), and to each of them the above-described shares of Common Stock,
par value $1.00 per share (the "Shares"), of Guaranty National Corporation, a
Colorado corporation (the "Company"), associated Rights in accordance with the
Purchasers' offer to purchase up to 4,600,000 of the outstanding Shares at a
price of $17.50 per Share, net to the seller in cash, upon the terms and subject
to the conditions set forth in the Offer to Purchase, as it may be amended or
supplemented from time to time, and this Letter of Transmittal (which together
constitute the "Offer"), receipt of which is hereby acknowledged. Unless the
context otherwise requires, all references to Shares shall include the
associated Rights and all references to the Rights shall include all benefits
that may inure to the holders of the Rights pursuant to the Rights Agreement,
including the right to receive any payment due upon redemption of the Rights.
The undersigned understands that each Purchaser reserves the right to transfer
or assign, in whole or from time to time in part, to one or more of its
affiliates, the right to purchase Shares tendered pursuant to the Offer.
Capitalized terms not defined herein shall have the meanings attributed to them
in the Offer to Purchase.
 
     The undersigned hereby irrevocably appoints W. Marston Becker and Michael
P. Maloney and each of them, the attorneys-in-fact and proxies of the
undersigned, each with full power of substitution, to vote in such manner as
each such attorney and proxy or his or her substitute shall, in his or her sole
discretion, deem proper, and otherwise act (including pursuant to written
consent) with respect to all of the Shares tendered hereby (and Distributions as
defined below) which have been accepted for payment by the Purchasers prior to
the time of such vote or action and which the undersigned is entitled to vote at
any meeting of stockholders of the Company (whether annual or special and
whether or not an adjourned meeting), or by written consent in lieu of such
meeting, or otherwise. This power of attorney and proxy is coupled with an
interest in the Company and in the Shares and is irrevocable and is granted in
consideration of, and is effective upon, the acceptance for payment of such
Shares by the Purchasers in accordance with the terms of the Offer. Such
acceptance for payment shall revoke, without further action, any other power of
attorney or proxy granted by the undersigned at any time with respect to such
Shares (and Distributions) and no subsequent powers of attorney or proxies will
be given (and if given will be deemed not to be effective) with respect thereto
by the undersigned. The undersigned understands that the Purchasers reserve the
right to require that, in order for Shares to be deemed validly tendered,
immediately upon the Purchasers' acceptance for payment of such Shares, the
Purchasers are able to exercise full voting rights with respect to such Shares
and other securities, including voting at any meeting of stockholders.
 
     Subject to, and effective upon, acceptance for payment of, and payment for
the Shares tendered herewith in accordance with the terms of the Offer, as the
same may be extended or amended, the undersigned hereby sells, assigns and
transfers to or upon the order of the Purchasers, and each of them, all right,
title and interest in and to all of the Shares that are being tendered hereby or
orders the registration of such Shares delivered by book-entry transfer, and any
and all other Shares or other securities or rights issued or issuable in respect
of such Shares on or after May 8, 1996 and any or all dividends thereon or
distributions with respect thereto (collectively, "Distributions"), and hereby
irrevocably constitutes and appoints the Depositary the true and lawful agent
and attorney-in-fact of the undersigned with respect to such Shares (and all
Distributions), and any such other Shares, securities or rights (and all
Distributions), with full power of substitution (such power of attorney being
deemed to be an irrevocable power coupled with an interest), to (a) deliver
certificates for such Shares, or any such other Shares (and all Distributions),
securities or rights, or transfer ownership of such Shares (and all
Distributions) on the account books maintained by a Book-Entry Transfer
Facility, together, in any such case, with all accompanying evidences of
transfer and authenticity to or upon the order of the Purchasers, (b) present
such Shares, or any such other Shares, securities or rights, for transfer on the
Company's books, and (c) receive all benefits and otherwise exercise all rights
of beneficial ownership of such Shares, or any such other Shares, securities or
rights, all in accordance with the terms of the Offer.
 
     Notwithstanding anything to the contrary herein, no deduction from the
purchase price of $17.50 per Share pursuant to the Offer will be made with
respect to any dividend not in excess of $0.125 per Share which may be declared
by the Board of Directors of the Company to stockholders of record on any date
prior to June 5, 1996.
 
     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the tendered
Shares and any and all other Shares or other securities (and Distributions) or
rights at any time issued or issuable in respect of such Shares and that when
the same are accepted by the Purchasers, the Purchasers will acquire good,
marketable and unencumbered title thereto, free and clear of all liens,
restrictions, claims
<PAGE>   4
 
and encumbrances and the same will not be subject to any adverse claim. The
undersigned will, upon request, execute and deliver any additional documents
deemed by the Depositary or the Purchasers to be necessary or desirable to
complete the sale, assignment and transfer of the tendered Shares and any and
all other Shares or other securities or rights at any time issued or issuable in
respect thereof. In addition, the undersigned shall promptly remit and transfer
to the Depositary for the account of the Purchasers any and all other Shares or
other securities or rights issued to the undersigned on or after May 8, 1996 in
respect of the Shares tendered hereby, accompanied by appropriate documentation
of transfer, and, pending such remittance or appropriate assurances thereof, the
Purchasers shall be entitled to all rights and privileges as owner of any such
Shares or other securities or rights and may withhold the entire purchase price
or deduct from the purchase price the amount or value thereof, as determined by
Orion on behalf of the Purchasers, in its sole discretion.
 
     No authority herein conferred or agreed to be conferred shall be affected
by, and all such authority shall survive, the death or incapacity of the
undersigned. All obligations of the undersigned hereunder shall be binding upon
the heirs, personal representatives, successors and assigns of the undersigned.
Except as otherwise stated in the Offer to Purchase, this tender is irrevocable.
 
     The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in Section 3 of the Offer to Purchase and in the
instructions hereto will constitute the undersigned's acceptance of the terms
and conditions of the Offer. Purchasers' acceptance of such Shares for payment
will constitute a binding agreement between the undersigned and Purchasers upon
the terms and subject to the conditions of the Offer, including, without
limitation, the undersigned's representation and warranty that the undersigned
owns the Shares being tendered.
 
     Specifically, the undersigned understands that if more than 4,600,000
shares are validly tendered and not withdrawn in accordance with Section 4 of
the Offer to Purchase, shares so tendered and not withdrawn will be accepted on
a pro rata basis as described in the Offer to Purchase.
 
     Unless otherwise indicated herein in the box entitled "Special Payment
Instructions," please issue the check for the purchase price of all Shares
purchased, and return all Share Certificates evidencing Shares not purchased or
not tendered, in the name(s) of the registered holder(s) appearing above under
"Description of Shares Tendered." Similarly, unless otherwise indicated in the
box entitled "Special Delivery Instructions," please mail the check for the
purchase price of all Shares purchased and all Share Certificates evidencing
Shares not tendered or not purchased (and accompanying documents, as
appropriate) to the address(es) of the registered holder(s) appearing above
under "Description of Shares Tendered." In the event that the boxes entitled
"Special Payment Instructions" and "Special Delivery Instructions" are both
completed, please issue the check for the purchase price of all purchased and
return all Share Certificates evidencing Shares not purchased or not tendered in
the name(s) of, and mail such check and Certificates to, the person(s) so
indicated. Stockholders tendering Shares by book-entry transfer may request that
any Shares not accepted for payment be returned by crediting such account
maintained at such Book-Entry Transfer Facility as such stockholder may
designate by making an appropriate entry under "Special Payment Instructions."
The undersigned recognizes that Purchasers have no obligation, pursuant to the
Special Payment Instructions, to transfer any Shares from the name of the
registered holder(s) hereof if the Purchasers do not purchase any of the Shares
tendered hereby.
<PAGE>   5
 
          ------------------------------------------------------------
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if the check for the purchase price of Shares
   purchased or Share Certificates evidencing Shares not tendered or not
   purchased are to be issued in the name of someone other than the
   undersigned or if Shares tendered by book-entry transfer which are not
   purchased are to be returned by credit to an account maintained at a
   Book-Entry Transfer Facility other than that designated on the front
   cover.
 
   Issue:  / / Check  / / Share Certificate (s) to:
 
   Name:
   ----------------------------------------------------------------------
                                 (PRINT)
 
   Address:
   ----------------------------------------------------------------------
 
   ----------------------------------------------------------------------
                                 (ZIP CODE)
 
   ----------------------------------------------------------------------
                          TAXPAYER IDENTIFICATION OR
                            SOCIAL SECURITY NUMBER
 
   / /  Credit unpurchased Shares tendered by book-entry transfer to the
        Book-Entry Transfer Facility account set forth below:
                          / /  DTC          / /  PDTC
 
   ------------------------------------------------------------
                                (Account Number)
 
                   (See Substitute Form W-9 on reverse side)
          ------------------------------------------------------------
          ------------------------------------------------------------
 
                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if the check for the purchase price of Shares
   purchased or Share Certificates evidencing Shares not tendered or not
   purchased are to be mailed to someone other than the undersigned, or to
   the undersigned at an address other than that shown under "Description of
   Shares Tendered."
 
   Deliver:  / / Check  / / Share Certificate (s) to:
 
   Name:
   ---------------------------------------------------------------------
                                  (PRINT)
 
   Address:
   ----------------------------------------------------------------------
 
   ----------------------------------------------------------------------
                                 (ZIP CODE)
 
   ----------------------------------------------------------------------
<PAGE>   6
 
- --------------------------------------------------------------------------------
                                   IMPORTANT
 
                            SHAREHOLDERS:  SIGN HERE
              (ALSO COMPLETE SUBSTITUTE FORM W-9 INCLUDED HEREIN)
 
            --------------------------------------------------------
 
            --------------------------------------------------------
                           SIGNATURE(S) OF HOLDER(S)
 
            Dated:
            ------------------------------------------------ , 1996
 
                 (Must be signed by registered holder(s) exactly as
            name(s) appear(s) on Share Certificates or on a security
            position listing or by a person(s) authorized to become
            registered holder(s) by certificates and documents
            transmitted herewith. If signature is by a trustee,
            executor, administrator, guardian, attorney-in-fact,
            officer of a corporation or other person acting in a
            fiduciary or representative capacity, please provide the
            following information. See Instruction 5.)
 
            Name(s):------------------------------------------------
 
            --------------------------------------------------------
                                 (PLEASE PRINT)
 
            Capacity (Full Title)
                            ----------------------------------------
 
            Address
                  --------------------------------------------------
 
            --------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
            Area Code and Telephone No.:
                                  ----------------------------------
 
            Taxpayer Identification or Social Security No.:
                                           -------------------------
                   (SEE SUBSTITUTE FORM W-9 INCLUDED HEREIN)
 
                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 
            Authorized Signature:
                            ----------------------------------------
 
            Name (Please print):
                            ----------------------------------------
 
            Name of Firm:
                       ---------------------------------------------
 
            Address:
                  --------------------------------------------------
 
            --------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
            Area Code and Telephone Number:
                                     -------------------------------
 
            Dated: __________________________________, 1996
 
            FOR USE BY FINANCIAL INSTITUTIONS ONLY. PLACE MEDALLION
            GUARANTEE IN SPACE BELOW.
- --------------------------------------------------------------------------------
<PAGE>   7
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. Guarantee of Signatures.  Certificates need not be endorsed and stock
powers and signature guarantees are unnecessary unless (a) a certificate is
registered in a name other than that of the person surrendering the certificate,
or (b) such registered holder (which term for purposes of this document, shall
include any participant in a Book-Entry Facility whose name appears on a
security position listing as the owner of the Shares) completes the Special
Payment Instructions or Special Delivery Instructions. In the case of (a) above,
such certificates must be duly endorsed or accompanied by a properly executed
stock power, with the endorsement or signature on the stock power and on the
Letter of Transmittal guaranteed by a firm which is a member of a registered
national securities exchange or of the National Association of Securities
Dealers, Inc. or a financial institution (including most banks, savings and loan
associations and brokerage houses) that is a member of the Securities Transfer
Association's approved medallion program (such as STAMP, SEMP, or MSP) (an
"Eligible Institution"), unless surrendered for the account of such Eligible
Institution. In the case of (b) above, the signature on the Letter of
Transmittal must be similarly guaranteed. See Instruction 5.
 
     2. Delivery of Letter of Transmittal and Certificates or Book-Entry
Confirmations.  This Letter of Transmittal is to be completed by stockholders
either if certificates are to be forwarded herewith or if tenders are to be made
pursuant to the procedures for delivery by book-entry transfer set forth in
Section 3 of the Offer to Purchase. Certificates for all physically delivered
Shares, or confirmation of any book-entry transfer into the Depositary's account
at a Book-Entry Transfer Facility of Shares delivered by book-entry transfer, as
well as a properly completed and duly executed Letter of Transmittal (or
facsimile thereof or, in the case of a book-entry delivery, an Agent's Message),
with any required signature guarantees and any other documents required by this
Letter of Transmittal, must be received by the Depositary at one of its
addresses set forth on the front side hereof prior to the Expiration Date (as
defined in the Offer to Purchase) or the tendering stockholder must comply with
the procedures referred to in the next sentence. Stockholders whose certificates
are not immediately available or who cannot deliver their certificates and all
other required documents to the Depositary prior to the Expiration Date may
tender their Shares by properly completing and duly executing the Notice of
Guaranteed Delivery pursuant to the guaranteed delivery procedure set forth in
Section 3 of the Offer to Purchase. Pursuant to such procedure (i) such tender
must be made by or through an Eligible Institution, (ii) a properly completed
and duly executed Notice of Guaranteed Delivery substantially in the form
provided by the Purchasers must be received by the Depositary prior to the
Expiration Date and (iii) the share certificates for all tendered Shares, in
proper form for transfer (or confirmation of any book-entry transfer into the
Depositary's account at a Book-Entry Transfer Facility of Shares delivered by
book-entry transfer), together with this Letter of Transmittal (or facsimile
thereof or, in the case of a book-entry delivery, an Agent's Message), properly
completed and duly executed, and any other documents required by this Letter of
Transmittal, must be received by the Depositary within three New York Stock
Exchange trading days after the date of execution of such Notice of Guaranteed
Delivery, all as provided in Section 3 of the Offer to Purchase. The Notice of
Guaranteed Delivery must be delivered by hand to the Depositary or transmitted
by telegram, facsimile transmission or mail and must include a guarantee of an
Eligible Institution in the form set forth on the Notice of Guaranteed Delivery.
 
     THE METHOD OF DELIVERY OF SHARES AND ANY OTHER REQUIRED DOCUMENTS IS AT THE
ELECTION AND RISK OF THE TENDERING STOCKHOLDER. IF CERTIFICATES FOR SHARES ARE
SENT BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED,
IS RECOMMENDED.
 
     No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. All tendering stockholders, by execution of
this Letter of Transmittal (or facsimile hereof), waive any right to receive any
notice of the acceptance of their Shares for payment.
 
     3. Inadequate Space.  If the space provided herein is inadequate, the
certificate numbers and/or the number of Shares should be listed on a separate
schedule attached hereto and separately signed on each page thereof in the same
manner as this Letter of Transmittal is signed.
<PAGE>   8
 
     4. Partial Tenders.  (Applicable to Certificate Stockholders only). If
fewer than all the Shares evidenced by any certificate submitted are to be
tendered, fill in the number of Shares which are to be tendered in the box
entitled "Number of Shares Tendered." In such case, new certificate(s) for the
remainder of the Shares that were evidenced by the old certificate(s) will be
issued and sent to the registered holder, unless otherwise provided in the
appropriate box on this Letter of Transmittal, as soon as practicable after the
expiration of the Offer. All Shares represented by certificates delivered to the
Depositary will be deemed to have been tendered unless otherwise indicated.
 
     5. Signatures on Letter of Transmittal, Stock Powers and Endorsements.  If
this Letter of Transmittal is signed by the registered holder of the Shares
tendered hereby, the signature must correspond with the name as written on the
face of the certificate(s) without alteration, enlargement or any change
whatsoever.
 
     If any of the Shares tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.
 
     If any of the Shares tendered hereby are registered in different names on
several certificates, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of
certificates.
 
     If this Letter of Transmittal or any certificates or stock powers are
signed by trustees, executors, administrators, guardians, attorneys-in-fact,
officers of corporations or others acting in a fiduciary or representative
capacity, such persons should so indicate when signing, and proper evidence
satisfactory to the Purchasers of their authority to so act must be submitted.
 
     When this Letter of Transmittal is signed by the registered owner(s) of the
Shares listed and transmitted hereby, no endorsements of certificates or
separate stock powers are required unless payment is to be made, or certificates
for Shares not tendered or purchased are to be issued, to a person other than
the registered owner(s). Signatures on such certificates or stock powers must be
guaranteed by an Eligible Institution.
 
     If this Letter of Transmittal is signed by a person other than the
registered owner(s) of the certificates listed, the certificates must be
endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name or names of the registered owner or owners appear on the
certificates. Signatures on such certificates or stock powers must be guaranteed
by an Eligible Institution.
 
     6. Stock Transfer Taxes.  Except as set forth in this Instruction 6, no
stock transfer tax stamps or funds to cover such stamps need accompany this
instrument. Any such transfer taxes applicable to the transfer and sale to the
Purchasers pursuant to the Offer will be paid by or on behalf of the Purchasers.
If, however, payment of the purchase price is to be made to, or certificates for
Shares not tendered or purchased are to be registered in the name of, any person
other than the person(s) signing this Letter of Transmittal, the amount of any
stock transfer taxes (whether imposed on the registered holder or such person)
payable on account of the transfer to such person will be deducted from the
purchase price unless satisfactory evidence of payment of such taxes or
exemption therefrom is submitted.
 
     7. Special Payment and Delivery Instructions.  If a check is to be issued
in the name of, and/or certificates for unpurchased Shares are to be issued to,
a person other than the signer of this Letter of Transmittal or if a check is to
be sent and/or such certificates are to be returned to someone other than the
signer of this Letter of Transmittal, or to an address other than that shown
above, the appropriate boxes on this Letter of Transmittal should be completed.
Stockholders tendering Shares by book-entry transfer (i.e., Book-Entry
Stockholders) may request that Shares not purchased be credited to such account
maintained at such Book-Entry Transfer Facility as such Book-Entry Stockholder
may designate hereon. If no such instructions are given, such Shares not
purchased will be returned by crediting the account at the Book-Entry Transfer
Facility designated above. See Instruction 1.
 
     8. Substitute Form W-9.  Each tendering stockholder is required to provide
the Depositary with a correct Taxpayer Identification Number ("TIN") on
Substitute Form W-9, which is provided under "Important Tax Information" below
and to indicate that the stockholder is not subject to backup withholding by
checking the box in Part 2 of the form. Failure to provide the information on
the form may subject the tendering stockholder to 31% federal income tax
withholding on the payment of the purchase price. The box in Part 3 of the form
may be checked if the tendering stockholder has not been issued a TIN and has
applied for a number or intends to apply for a number in the near future. If the
box in Part 3 is checked and the Depositary is not provided with a TIN within 60
days, the Depositary will withhold 31% on all payments of the purchase price
thereafter until a TIN is provided to the Depositary.
<PAGE>   9
 
     9. Requests for Assistance or Additional Copies.  Requests for assistance
or additional copies of the Offer to Purchase, this Letter of Transmittal, the
Notice of Guaranteed Delivery and the Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9 may be directed to the Information
Agent or the Dealer Manager at their addresses set forth below.
 
     10. Waiver of Conditions.  The conditions of the Offer may be waived by the
Purchasers, in whole or in part, at any time in their sole discretion in the
case of any Shares tendered.
 
     11. Order in Which Shares Will Be Accepted (Not applicable to shareholders
who tender by book-entry transfer). In the event of proration, the Shares listed
in the box captioned "Description of Shares Tendered" will be accepted for
payment in the order in which certificate numbers of such shares are listed.
Tendering stockholders who wish to have Shares accepted for payment in a
specific order in the event of proration should list the Shares in that order in
the box captioned "Description of Shares Tendered."
 
     12. Lost, Destroyed or Stolen Certificates. If any certificate(s)
representing Shares has been lost, destroyed or stolen, the stockholder should
promptly notify the Depositary. The stockholder will then be instructed as to
the steps that must be taken in order to replace the certificates(s). This
Letter of Transmittal and related documents cannot be processed until the
procedures for replacing lost or destroyed certificates have been followed.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL OR A FACSIMILE COPY HEREOF (TOGETHER
WITH CERTIFICATES FOR SHARES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL
OTHER REQUIRED DOCUMENTS) MUST BE RECEIVED BY THE DEPOSITARY, OR THE NOTICE OF
GUARANTEED DELIVERY MUST BE RECEIVED BY THE DEPOSITARY, PRIOR TO THE EXPIRATION
DATE (AS DEFINED IN THE OFFER TO PURCHASE).
 
                           IMPORTANT TAX INFORMATION
 
     Under U.S. Federal income tax law, a stockholder whose tendered Shares are
accepted for payment is required to provide the Depositary with such
stockholder's correct TIN on Substitute Form W-9 below. If such stockholder is
an individual, the TIN is his social security number. If the Depositary is not
provided with the correct TIN, the stockholder may be subject to a $50 penalty
imposed by the Internal Revenue Service. In addition, payments that are made to
such stockholder with respect to Shares purchased pursuant to the Offer may be
subject to backup withholding.
 
     Certain stockholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, that stockholder must submit a statement, signed under penalties of
perjury, attesting to that individual's exempt status. Such statements can be
obtained from the Depositary. See the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 for additional
instructions.
 
     If backup withholding applies, the Depositary is required to withhold 31%
of all payments made to the stockholder. Backup withholding is not an additional
tax. Rather, the tax liability of persons subject to backup withholding will be
reduced by the amount of tax withheld. If withholding results in an overpayment
of taxes, a refund may be obtained.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
     To prevent backup withholding on payments that are made to a stockholder
with respect to Shares purchased pursuant to the Offer, the stockholder is
required to notify the Depositary of his correct TIN by completing the form
below certifying that the TIN provided on Substitute Form W-9 is correct (or
that such stockholder is awaiting a TIN) and that (1) the stockholder has not
been notified by the Internal Revenue Service that he is subject to backup
withholding as a result of a failure to report all interest or dividends or (2)
the Internal Revenue Service has notified the stockholder that he is no longer
subject to backup withholding.
 
     The box in Part 3 of the Substitute Form W-9 may be checked if the
tendering stockholder has not been issued a TIN and has applied for a TIN or
intends to apply for a TIN in the near future. If the box in Part 3 is checked,
the stockholder or other payee must also complete the Certificate of Awaiting
Taxpayer Identification Number below in order to avoid backup withholding.
Notwithstanding that the box in Part 3 is checked and the Certificate of
Awaiting Taxpayer Identification Number is completed, the Depositary will
withhold 31% of all payments made prior to the time a properly certified TIN is
provided to the Depositary.
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The stockholder is required to give the Depositary the social security
number or employer identification number of the record owner of the Shares. If
the Shares are registered in more than one name or are not registered in the
name of the actual owner, consult the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 for additional guidance on
which number to report.
<PAGE>   10
 
                 TO BE COMPLETED BY ALL TENDERING STOCKHOLDERS
                              (SEE INSTRUCTION 8)
 
<TABLE>
<S>                              <C>                                    <C>
- --------------------------------------------------------------------------------
PAYER'S NAME: STATE STREET BANK AND TRUST COMPANY
- ---------------------------------------------------------------------------------------------------------
                                 PART 1--PLEASE PROVIDE YOUR TIN IN THE Social Security Number or
                                 BOX AT RIGHT AND CERTIFY BY SIGNING    Employer ID Number
SUBSTITUTE                       AND DATING BELOW.                      ------------------------------
Form W-9                         ------------------------------------------------------------------------
                                  PART 2--CERTIFICATIONS--Under penalties of perjury, I certify that:
                                  (1) The number shown on this form is my correct Taxpayer Identification
Department of the Treasury            Number (or I am waiting for a number to be issued to me and have
Internal Revenue Service              checked the box in Part 3) and
                                  (2) I am not subject to backup withholding because: (a) I am exempt
                                      from backup withholding, or (b) I have not been notified by the
                                      Internal Revenue Service (the "IRS") that I am subject to backup
Payer's Request for Taxpayer          withholding as a result of a failure to report all interest or
Identification Number ("TIN")         dividends, or (c) the IRS has notified me that I am no longer
                                      subject to backup withholding.
                                  CERTIFICATION INSTRUCTIONS--You must cross out item (2) above if you
                                  have been notified by the IRS that you are currently subject to backup
                                  withholding because of underreporting interest or dividends on your tax
                                  return. However, if after being notified by the IRS that you were
                                  subject to backup withholding you received another notification from
                                  the IRS that you are no longer subject to backup withholding, do not
                                  cross out such item (2).
                                 ------------------------------------------------------------------------
                                                                                                 PART 3
                                 SIGNATURE  __________________________  DATE  ______________    Awaiting
                                                                                                TIN  / /
- ---------------------------------------------------------------------------------------------------------
</TABLE>
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER. PLEASE REVIEW
      THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
      NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
 
               YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU
              CHECKED THE BOX IN PART 3 OF THE SUBSTITUTE FORM W-9
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
I certify under penalties of perjury that a taxpayer identification number has
not been issued to me, and either (1) I have mailed or delivered an application
to receive a taxpayer identification number to the appropriate Internal Revenue
Service Center or Social Security Administration Office or (2) I intend to mail
or deliver an application in the near future. I understand that if I do not
provide a taxpayer identification number by the time of payment, 31% of all
reportable payments made to me will be withheld, but that such amounts will be
refunded to me if I then provide a Taxpayer Identification Number within sixty
(60) days.
 
Signature:                               Date:
- -----------------------------------      --------------------------------------
 
                    THE INFORMATION AGENT FOR THE OFFER IS:
                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                          Call Collect: (212) 269-5550
                         CALL TOLL FREE (800) 829-6551
 
                      THE DEALER MANAGER FOR THE OFFER IS:
                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
                                277 Park Avenue
                            New York, New York 10172
                         (212) 892-7700 (Call Collect)

<PAGE>   1
                         NOTICE OF GUARANTEED DELIVERY
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)
 
                                       TO
 
                         TENDER SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)
 
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
 
     As set forth in Section 3 of the Offer to Purchase described below, this
form or one substantially equivalent hereto must be used to accept the Offer (as
defined below) if certificates for Shares are not immediately available or if
the procedure for book-entry transfer cannot be completed on a timely basis or
time will not permit all required documents to reach the Depositary prior to the
Expiration Date (as defined in Section 1 of the Offer to Purchase) of the Offer.
Such form may be delivered by hand or sent by telegram, facsimile transmission
or mail to the Depositary.
 
                        THE DEPOSITARY FOR THE OFFER IS
<TABLE> 
<S>                                                            <C>
                      STATE STREET BANK AND TRUST COMPANY
                                   


          By Mail:                 By Overnight Courier:                  By Hand:
State Street Bank and Trust     State Street Bank and Trust            Bank of Boston
          Company                         Company                   c/o Boston Equiserve
  Corporate Reorganization        Corporate Reorganization         55 Broadway, 3rd Floor
       P. O. Box 9061                 2 Heritage Drive               New York, NY 10006
   Boston, MA 02205-8686           North Quincy, MA 02171
</TABLE>
 
                      Facsimile Transmission Copy Number:
                                 (617) 774-4519
 
                            Confirm by telephone to:
                                 (617) 774-4511
 
   DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR
TRANSMISSION OF THIS INSTRUMENT VIA A FACSIMILE NUMBER OTHER THAN THE ONE LISTED
                  ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.
 
     This Notice of Guaranteed Delivery is not to be used to guarantee
signatures. If a signature of a Letter of Transmittal is required to be
guaranteed by an "Eligible Institution" under the instructions thereto, such
signature guarantee must appear in the applicable space provided in the
signature box on the Letter of Transmittal.
<PAGE>   2
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Orion Capital Corporation, a Delaware
corporation, on behalf of all Purchasers named in and upon the terms and subject
to the conditions set forth in the Offer to Purchase dated May 8, 1996 and the
related Letter of Transmittal (which, as amended from time to time, together
constitute the "Offer"), receipt of which is hereby acknowledged, the number of
shares set forth below of Common Stock, $1.00 par value per share (the
"Shares"), of Guaranty National Corporation (the "Company"), a Colorado
corporation, pursuant to the guaranteed delivery procedure set forth in Section
3 of the Offer to Purchase. All references to Shares include the Rights and all
benefits which may inure to stockholders of the Company pursuant to the Rights
Agreement referred to in the Offer to Purchase dated May 8, 1996.
 
Number of Shares:
Signature(s)
 
Name(s)
 
Certificate Nos. (If Available)
 
Address
 
Area Code and Tel. No.
[ ] (Check one if Shares will be
    tendered by book-entry transfer)
[ ] The Depository Trust Company
[ ] The Philadelphia Depository Trust Company
 
Account Number
 
Dated , 1996
 
                      NOTE: REVERSE SIDE MUST BE COMPLETED
<PAGE>   3
 
                                   GUARANTEE
 
     The undersigned, a member of a registered national securities exchange or
of the National Association of Securities Dealers, Inc. or a commercial bank or
trust company having an office or correspondent in the United States, (a)
represents that the above-named person(s) "own(s)" the Shares tendered hereby
within the meaning of Rule 14e-4 under the Securities Exchange Act of 1934, as
amended, and (b) guarantees delivery to the Depositary of certificates for
Shares tendered hereby, in proper form for transfer, or delivery of Shares
pursuant to the procedure for book-entry transfer at The Depository Trust
Company or The Philadelphia Depository Trust Company, in either case with
delivery of a properly completed and duly executed Letter of Transmittal (or
facsimile thereof), with any required signature guarantees or an Agent's Message
(as defined in the Offer to Purchase) and any other required documents, all
within three New York Stock Exchange, Inc. trading days after the date hereof.
 

- -----------------------------------     -----------------------------------
  Name of Firm/Participant Number              Authorized Signature
 

- -----------------------------------     -----------------------------------
             Address                                  Title  


                                        Name 
- -----------------------------------          ------------------------------
                          Zip Code               (Please Type or Print)  
 

Area Code and Tel. No.                  Dated                         , 1996   
                       ------------           ------------------------

 
     The Eligible Institution which completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal and
certificates for Shares to the Depositary within the time period shown herein.
Failure to do so could result in a financial loss to such Eligible Institution.
 
              NOTE: DO NOT SEND STOCK CERTIFICATES WITH THIS FORM

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                                     UP TO
                        4,600,000 SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)
 
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
 
                                       AT
 
                              $17.50 NET PER SHARE
 
                                       BY
 
                           ORION CAPITAL CORPORATION
                  AND CERTAIN OF ITS WHOLLY-OWNED SUBSIDIARIES
 
     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00
MIDNIGHT NEW YORK CITY TIME, ON WEDNESDAY, JUNE 5, 1996, UNLESS THE OFFER IS
EXTENDED.
 
                                                                     May 8, 1996
 
To Brokers, Dealers, Commercial Banks,
  Trust Companies and Nominees:
 
     We have been appointed by Orion Capital Corporation, a Delaware
corporation, and certain of its subsidiaries (Orion and such subsidiaries being
hereinafter collectively referred to as the "Purchasers") to act as Dealer
Manager in connection with the Purchasers' offer to purchase up to 4,600,000
shares of common stock, $1.00 par value per share (the "Shares"), of Guaranty
National Corporation, a Colorado corporation (the "Company"), at $17.50 per
Share, net to the seller in cash upon the terms and subject to the conditions
set forth in the Offer to Purchase dated May 8, 1996 and in the related Letter
of Transmittal (which together constitute the "Offer"). We are enclosing
herewith the material listed below relating to the Offer.
 
     THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING
TENDERED. HOWEVER, THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I)
EXPIRATION OR EARLIER TERMINATION OF ALL APPLICABLE WAITING PERIODS UNDER THE
HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED, AND (II) THE
RECEIPT OF ALL REQUIRED STATE INSURANCE DEPARTMENT REGULATORY APPROVALS ON TERMS
AND CONDITIONS SATISFACTORY TO THE PURCHASERS. THE OFFER IS ALSO SUBJECT TO
OTHER TERMS AND CONDITIONS. IF MORE THAN 4,600,000 SHARES ARE PROPERLY TENDERED
AND NOT WITHDRAWN, THEN, SUBJECT TO THE TERMS AND CONDITIONS OF THE OFFER, SUCH
SHARES WILL BE ACCEPTED ON A PRO RATA BASIS.
 
     We are asking you to contact your clients for whom you hold Shares
registered in your name (or in the name of your nominee) or who hold Shares
registered in their own names. No fees or commissions will be payable to
brokers, dealers or other persons for soliciting tenders of Shares pursuant to
the Offer. The Purchasers will, however, upon request reimburse you for
customary mailing and handling expenses incurred by you in forwarding any of the
enclosed materials to your clients. The Purchasers will pay all transfer taxes
on its purchase of Shares, subject to Instruction 6 of the Letter of
Transmittal.
 
     For your information and for forwarding to your clients we are enclosing
the following documents:
 
     (1) Offer to Purchase, dated May 8, 1996.
 
     (2) Letter of Transmittal to be used by holders of Shares to tender Shares
and for the information of your clients. Facsimile copies of the Letter of
Transmittal may be used to tender Shares.
 
     (3) Notice of Guaranteed Delivery;
 
     (4) Letter which may be sent to your clients for whose accounts you hold
Shares registered in your name (or in the name of your nominee), with space
provided for obtaining such clients' Instructions with regard to the Offer;
 
     (5) Guidelines of the Internal Revenue Service for Certification of
Taxpayer Identification Number;
 
     (6) Return envelopes addressed to the Depositary.
<PAGE>   2
 
     YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS
PROMPTLY. PLEASE NOTE THAT THE OFFER, WITHDRAWAL RIGHTS AND THE PRORATION PERIOD
WILL EXPIRE ON WEDNESDAY, JUNE 5, 1996, AT 12:00 MIDNIGHT, NEW YORK CITY TIME,
UNLESS THE OFFER IS EXTENDED.
 
     In order to accept the Offer, a duly executed and properly completed Letter
of Transmittal and any required signature guarantees, or an Agent's Message (as
defined in the Offer to Purchase), in connection with a book-entry delivery of
Shares, and any other required documents should be sent to the Depositary and
either Share certificates representing the tendered Shares should be delivered
to the Depositary, or Shares should be tendered by book-entry transfer into the
Depositary's account maintained at one of the Book Entry Transfer Facilities (as
described in the Offer to Purchase), all in accordance with the instructions set
forth in the Letter of Transmittal and the Offer to Purchase.
 
     If holders of Shares wish to tender their Shares but it is impracticable
for them to forward their certificates on or prior to the expiration date, such
Shares may be tendered pursuant to the guaranteed delivery procedures set forth
in Section 3 of the Offer to Purchase.
 
     Your solicitation of tenders of Shares will constitute your representation
to the Purchasers that (i) in connection with such solicitation, you have
complied with the applicable requirements of the Securities Exchange Act of 1934
and the applicable rules and regulations thereunder; (ii) if a foreign broker or
dealer, you have conformed to the Rules of Fair Practice of the National
Association of Securities Dealers, Inc. in making solicitations; and (iii) in
soliciting tenders of Shares, you have not used any soliciting materials other
than those furnished by the Purchasers.
 
     The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares residing in any jurisdiction in which the making of
the Offer or the acceptance thereof would not be in compliance with the laws of
such jurisdiction.
 
     Additional copies of the enclosed material may be obtained from D.F. King &
Co., Inc., the Information Agent, or from Donaldson, Lufkin & Jenrette
Securities Corporation, the Dealer Manager, at the addresses set forth below.
Any questions or requests you may have with respect to the Offer should be
directed to the undersigned at the addresses and telephone numbers listed below.
 
                                      Very truly yours,
 
                                     DONALDSON, LUFKIN & JENRETTE
                                        Securities Corporation
 
NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU OR
ANY OTHER PERSON THE AGENT OF ANY OF THE PURCHASERS, THE INFORMATION AGENT, THE
DEALER MANAGER OR THE DEPOSITARY OR AUTHORIZE YOU OR ANY OTHER PERSON TO MAKE
ANY STATEMENTS OR USE ANY MATERIAL ON THEIR BEHALF WITH RESPECT TO THE OFFER,
OTHER THAN THE MATERIAL ENCLOSED HEREWITH AND THE STATEMENTS SPECIFICALLY SET
FORTH IN SUCH MATERIAL.
 
                             D.F. KING & CO., INC.
                               INFORMATION AGENT
 
                                77 Water Street
                               New York, NY 10005
                                 (212) 269-5550
                                 (Call Collect)

                         Call Toll Free (800) 829-6551
 
                      The Dealer Manager for the Offer is:
 
                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
                                277 Park Avenue
                            New York, New York 10172
                         (212) 892-7700 (Call Collect)

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                                     UP TO
 
                        4,600,000 SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)
 
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
 
                                       AT
 
                              $17.50 NET PER SHARE
 
                                       BY
 
                           ORION CAPITAL CORPORATION
                  AND CERTAIN OF ITS WHOLLY-OWNED SUBSIDIARIES
 
     THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE ON WEDNESDAY,
JUNE 5, 1996, AT 12:00 MIDNIGHT, NEW YORK CITY TIME, UNLESS THE OFFER IS
EXTENDED.
 
                                                                     May 8, 1996
 
To Our Clients:
 
     Enclosed for your consideration are the Offer to Purchase dated May 8, 1996
(the "Offer to Purchase") and the related Letter of Transmittal (which, together
with any amendments or supplements thereto, constitute the "Offer") in
connection with the offer by Orion Capital Corporation, a Delaware corporation,
and certain of its wholly-owned subsidiaries (Orion and such subsidiaries being
hereinafter collectively referred to as the "Purchasers"), to purchase up to
4,600,000 outstanding shares of Common Stock, $1.00 par value per share (the
"Shares"), of Guaranty National Corporation, a Colorado corporation (the
"Company"), and any Rights, for $17.50 per Share, net to the seller in cash,
upon the terms and subject to the conditions set forth in the Offer. Unless the
context otherwise requires, all references to Shares shall include the
associated Rights and all references to the Rights shall include all benefits
that may inure to holders of the Rights pursuant to the Rights Agreement (as
defined in the Offer to Purchase), including the right to receive any payment
due upon redemption of the Rights. Holders of Shares whose certificates for such
Shares (the "Share Certificates") are not immediately available, or who cannot
deliver their Share Certificates and all other required documents to the
Depositary on or prior to the Expiration Date (as defined in the Offer to
Purchase), or who cannot complete the procedures for book-entry transfer on a
timely basis, must tender their Shares according to the guaranteed delivery
procedures set forth in Section 3 of the Offer to Purchase.
 
     We are the holder of record of Shares held by us for your account. A tender
of such Shares can be made only by us as the holder of record and pursuant to
your instructions. THE SPECIMEN LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR
YOUR INFORMATION ONLY AND CANNOT BE USED BY YOU TO TENDER SHARES.
 
     We request instructions as to whether you wish to have us tender on your
behalf any or all of such Shares held by us for your account, pursuant to the
terms and conditions set forth in the Offer.
 
     Your attention is invited to the following:
 
          1. The tender price is $17.50 per Share, net to the seller in cash,
     without interest, upon the terms and subject to the conditions set forth in
     the Offer.
 
          2. The Offer is being made for up to 4,600,000 Shares and if a greater
     number of Shares is validly tendered and not withdrawn, the Purchasers will
     accept Shares for purchase pro rata from each tendering stockholder.
<PAGE>   2
 
          3. The Offer, proration period and withdrawal rights will expire on
     Wednesday, June 5, 1996, at 12:00 midnight, New York City time, unless the
     Offer is extended.
 
          4. The Offer is conditioned as set forth in the Offer to Purchase but
     is not conditioned on any minimum number of Shares being validly tendered
     and not withdrawn prior to the expiration of the Offer.
 
          5. Stockholders who tender Shares will not be obligated to pay
     brokerage fees or commissions or, except as set forth in Instruction 6 of
     the Letter of Transmittal, transfer taxes on the purchase of Shares by the
     Purchasers pursuant to the Offer.
 
          6. Payment for Shares purchased pursuant to the Offer will in all
     cases be made only after timely receipt by State Street Bank and Trust
     Company (the "Depositary") of (a) Share Certificates or timely confirmation
     of the book-entry transfer of such Shares into the account maintained by
     the Depositary at The Depository Trust Company or The Philadelphia
     Depository Trust Company (collectively, the "Book-Entry Transfer
     Facilities"), pursuant to the procedures set forth in Section 3 of the
     Offer to Purchase, (b) the Letter of Transmittal (or a facsimile thereof),
     properly completed and duly executed, with any required signature
     guarantees, in connection with a book-entry delivery, and (c) any other
     documents required by the Letter of Transmittal. Accordingly, payment may
     not be made to all tendering stockholders at the same time depending upon
     when Share Certificates or confirmations of book-entry transfer of Shares
     into the Depositary's account at a Book-Entry Transfer Facility are
     actually received by the Depositary.
 
     If you wish to have us tender any or all of the Shares held by us for your
account, please so instruct us by completing, executing, detaching and returning
to us the instruction form set forth on the back page of this letter. If you
authorize the tender of your Shares, all such Shares will be tendered unless
otherwise specified on the back page of this letter. An envelope to return your
instructions to us is enclosed. Your instructions should be forwarded to us in
ample time to permit us to submit a tender on your behalf prior to the
expiration of the Offer.
 
     The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares residing in any jurisdiction in which the making of
the Offer or the acceptance thereof would not be in compliance with the laws of
such jurisdiction.
 
     In any jurisdiction where the securities, blue sky or other laws require
the Offer to be made by a licensed broker or dealer, the Offer is being made on
behalf of the Purchasers, if at all, only by Donaldson, Lufkin & Jenrette
Securities Corporation, the Dealer Manager for the Offer, or one or more
registered brokers or dealers that are licensed under the laws of such
jurisdiction.
<PAGE>   3
 
                          INSTRUCTIONS WITH RESPECT TO
                           OFFER TO PURCHASE FOR CASH
                     UP TO 4,600,000 SHARES OF COMMON STOCK
                                       OF
 
                         GUARANTY NATIONAL CORPORATION
 
     The undersigned acknowledge(s) receipt of your letter and the enclosed
Offer to Purchase dated May 8, 1996 and the related Letter of Transmittal
(which, as supplemented or amended, collectively constitute the "Offer") in
connection with the offer by Orion Capital Corporation, a Delaware corporation,
and certain of its wholly-owned subsidiaries to purchase up to 4,600,000 of the
outstanding shares of common stock, par value $1.00 per share (the "Shares").
 
     This will instruct you to tender the number of Shares indicated below held
by you for the account of the undersigned, upon the terms and subject to the
conditions set forth in the Offer to Purchase and the related Letter of
Transmittal.
 
Number(1) of Shares to be Tendered: __________ Shares of Common Stock
 
Account Number: ________________________________________
 
Dated:  ___________ , 1996
 
- --------------------------------------------------------------------------------
 
                                   SIGN HERE
 
Signature
        ------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Print Name(s):
             -------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Print Address(es):
                ----------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Area Code and Telephone No.:
                           -----------------------------------------------------
 
Taxpayer ID No. or Social Security No.:
                                  ----------------------------------------------
 
(1)Unless otherwise indicated, it will be assumed that all Shares held by us for
your account are to be tendered.

<PAGE>   1
 
                      ORION CAPITAL CORPORATION LETTERHEAD
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                            <C>                            <C>
NEWS RELEASE                   From: Vincent T. Papa          Dawn W. Dover
NYSE Symbol: OC                (212) 332-8088                 (212) 593-2655
                               Jeanne Hotchkiss               Kekst & Company
                               (860) 674-6754                 437 Madison Avenue
                                                              New York, NY 10022
</TABLE>
 
FOR IMMEDIATE RELEASE
 
           ORION CAPITAL CORPORATION WILL COMMENCE CASH TENDER OFFER
       TO INCREASE ITS OWNERSHIP OF GUARANTY NATIONAL CORPORATION TO 80%
- --------------------------------------------------------------------------------
 
New York, New York, May 7, 1996 -- Orion Capital Corporation and several of its
subsidiaries will tomorrow commence a cash tender offer at a price of $17.50 per
share net to the seller for up to 4,600,000 shares of the common stock of
Guaranty National Corporation (NYSE: GNC). The tender offer expires at midnight
on June 5, 1996, unless extended. Orion Capital currently owns through its
subsidiaries approximately 49.5% of the outstanding common stock of Guaranty
National. The purchase of 4,600,000 shares would increase Orion's ownership to
slightly more than 80%.
 
The tender offer is not subject to a minimum number of shares being tendered. If
more than 4,600,000 shares are properly tendered and not withdrawn prior to the
expiration of the offer, then shares will be accepted on a pro rata basis. The
tender offer is conditioned on, among other things, the receipt of all required
approvals of state insurance regulators and Hart-Scott-Rodino clearance. The
terms and conditions of the offer are set forth in tender offer materials that
will be filed on May 8, 1996 with the Securities and Exchange Commission, and
subsequently mailed to Guaranty National Corporation shareholders. The Dealer
Manager for the offer is Donaldson, Lufkin & Jenrette Securities Corporation.
 
"We have had a very rewarding relationship with Guaranty National since we
acquired a significant ownership interest in 1984," said Alan R. Gruber,
Chairman and Chief Executive Officer of Orion Capital Corporation. "An increase
in our percentage of ownership will allow us to become more involved in setting
the strategic direction of Guaranty National, and to participate to a greater
extent in its future growth." An 80% ownership will also allow Orion the benefit
of including Guaranty National in its consolidated federal income tax return.
 
Guaranty National is a Colorado-based property and casualty insurance holding
company with operating subsidiaries which write specialty commercial and private
passenger automobile insurance, as well as collateral protection and other
commercial coverages. Guaranty National is a leading provider of nonstandard
personal automobile insurance written through independent agents.
 
Orion Capital Corporation is engaged in the specialty property and casualty
insurance business through wholly-owned subsidiaries, which include EBI
Companies, DPIC Companies, Connecticut Specialty Insurance Group, SecurityRe
Companies and Wm. H. McGee & Co. Inc., as well as through its 49.5% ownership
interest in Guaranty National Corporation.

<PAGE>   1
This announcement is neither an offer to purchase nor a solicitation of an offer
 to sell Shares. The Offer is made solely by the Offer to Purchase dated May 8,
  1996 and the related Letter of Transmittal and is being made to all holders of
   Shares. The Offer is not being made to (nor will tenders be accepted from or
    on behalf of) the holders of Shares in any jurisdiction in which the making
     of the Offer or the acceptance thereof would not be in compliance with the
      laws of such jurisdiction. In those jurisdictions whose laws require the
       Offer to be made by a licensed broker or dealer, the Offer shall be 
        deemed to be made on behalf of the Purchasers, if at all, only by
         Donaldson, Lufkin & Jenrette Securities Corporation ("Dealer 
          Manager") or one or more registered brokers or dealers licensed
           under the laws of such jurisdiction.


                      NOTICE OF OFFER TO PURCHASE FOR CASH
                     UP TO 4,600,000 SHARES OF COMMON STOCK
                (INCLUDING ANY ASSOCIATED STOCK PURCHASE RIGHTS)

                                       OF

                         GUARANTY NATIONAL CORPORATION

                                       AT

                              $17.50 NET PER SHARE

                                       BY

                           ORION CAPITAL CORPORATION

                  AND CERTAIN OF ITS WHOLLY-OWNED SUBSIDIARIES

        Orion Capital Corporation, a Delaware corporation ("Orion"), and
certain of its wholly-owned subsidiaries named in the Offer to Purchase
(collectively the "Purchasers") are offering to purchase up to 4,600,000 shares
of Common Stock, par value $1.00 per share (the "Shares"), including any
associated stock purchase rights, of Guaranty National Corporation, a Colorado
corporation (the "Company"), at $17.50 per Share, net to the seller in cash,
without interest, upon the terms and subject to the conditions set forth in the
Offer to Purchase dated May 8, 1996 and the related Letter of Transmittal
(which together constitute the "Offer").

- --------------------------------------------------------------------------------
THE OFFER, PRORATION PERIOD AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
  NEW YORK CITY TIME, ON TUESDAY, JUNE 5, 1996, UNLESS THE OFFER IS EXTENDED.
- --------------------------------------------------------------------------------

        The Offer is not conditioned on any minimum number of Shares being
tendered. However, the Offer is conditioned upon, among other things, (I)
expiration or earlier termination of all applicable waiting periods under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and (II) the
receipt of all required state insurance department regulatory approvals on
terms and conditions satisfactory to the Purchasers. The Offer is also subject
to other terms and conditions. If more than 4,600,000 Shares are properly
tendered and not withdrawn, then, subject to the terms and conditions of the
Offer, such Shares will be accepted on a pro rata basis.

        The Purchasers beneficially own 49.5% of the outstanding Shares. As
described in the Offer to Purchase, the Purchasers' purpose in acquiring the
Shares is to increase their ownership interest to approximately 80% of the
outstanding Shares, thereby increasing their ability to control the Company and
causing the Company to be a member of Orion's consolidated group for federal
income tax purposes.

        For the purposes of the Offer, the Purchasers will be deemed to have
accepted for payment (and thereby purchased) validly tendered and not properly
withdrawn Shares when, as and if Orion on behalf of the Purchasers gives oral
or written notice to the Depositary, State Street Bank and Trust Company, of
the Purchasers' acceptance for payment of such Shares pursuant to the Offer.
Payment for Shares accepted for payment pursuant to the Offer may be delayed in
the event of proration due to the difficulty of determining the number of
Shares validly tendered and not withdrawn. Payment for Shares purchased
pursuant to the Offer will in all cases be made by deposit of the purchase
price with the Depositary, which will act as agent for the tendering
stockholders for the purpose of receiving payment from the Purchasers and
transmitting such payment to tendering stockholders. Under no circumstances
will interest on the Offer price be paid by the Purchasers by reason of any
delay in making such payment. In all cases, payment for Shares purchased
pursuant to the Offer will be made only after timely receipt by the Depositary
of certificates for such Shares or timely confirmation of book-entry transfer
of such Shares into the Depositary's account at one of the Book-Entry Transfer
Facilities as described in the Offer to Purchase, a properly completed and duly
executed Letter of 

<PAGE>   2

Transmittal (or facsimile thereof) and any other documents required by the
Letter of Transmittal.

        The Purchasers expressly reserve the right, in their sole discretion,
for any reason, at any time or from time to time, to extend the period of time
during which the Offer is open by giving oral or written notice of such
extension to the Depositary, followed by public announcement prior to 9:00
a.m., New York City time, on the next business day after the previously
scheduled expiration date to the Offer (which may be released to the Dow Jones
News Service). During any such extension, all Shares previously tendered and
not purchased or withdrawn will remain subject to the Offer.

        Tenders of Shares made pursuant to the Offer are irrevocable, except
that tendered Shares may be withdrawn at any time prior to 12:00 Midnight, New
York City time, on Wednesday, June 5, 1996, or the latest time and date at
which the Offer, if extended by the Purchasers, shall expire and, unless
theretofore accepted for payment as provided in the Offer, may also be
withdrawn after July 6, 1996. For a withdrawal to be effective, a written
telegraphic or facsimile transmission notice of withdrawal must be timely
received by the Depositary at one of its addresses set forth on the back cover
of the Offer to Purchase. Any such notice of withdrawal must specify the name
of the person who tendered the Shares to be withdrawn, the number of Shares to
be withdrawn and the name of the registered holder, if different from that of
the person having tendered such Shares. If certificates for Shares have been
delivered to the Depositary, then, prior to the physical release of such
certificates, the tendering stockholder must also submit the serial numbers
shown on the particular certificates evidencing the Shares to be withdrawn
and the signature on the notice of withdrawal must be guaranteed by an
Eligible Institution unless such Shares have been tendered for the account of
an Eligible Institution. If Shares have been tendered pursuant to the procedure
for book-entry transfer as set forth in the Offer to Purchase, any notice of
withdrawal must specify the name and number of the account at the applicable
Book-Entry Transfer Facility to be credited with the withdrawn Shares. All
questions as to the form and validity including time of receipt of notices of
withdrawal will be determined by the Purchasers, in their sole discretion,
which determination will be final and binding.

        If tendering stockholders tender more than the number of Shares that
the Purchasers seek to purchase pursuant to the Offer, the Purchasers will take
into account the number of Shares so tendered and take up and pay for Shares as
nearly as may be pro rata, disregarding fractions, according to the number of
Shares tendered by each tendering stockholder during the period during which
such Offer remains open.

        The information required to be disclosed by paragraph (e)(1)(vii) of
Rule 14d-6 and by paragraph (e)(1) of Rule 13e-3 (which Rule governs so-called
"going private" transactions) of the General Rules and Regulations under the
Securities Exchange Act of 1934, as amended, is contained in the Offer to
Purchase and is incorporated herein by reference.

THE OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH RESPECT TO
THE OFFER.

        A request is being made to the Company for the use of its stockholder
lists and security position listings for the purpose of disseminating the
Purchasers' Offer to holders of Shares. The Offer to Purchase and Letter of
Transmittal will be mailed to holders of record of Shares and will be furnished
to brokers, banks and similar persons whose name appears or whose nominee
appears on the shareholder list or, if applicable, who are listed as
participants in a clearing agency's security position listing for subsequent
transmittal to beneficial owners of Shares.

        Questions and requests for assistance or for copies of the Offer to
Purchase and the related Letter of Transmittal and other tender offer materials
may be directed to the Dealer Manager or the Information Agent at their
addresses and telephone numbers set forth below, and copies will be furnished
promptly at the Purchasers' expense. The Purchasers will not pay any fees or
commissions to any broker or dealer or any other persons (other than the Dealer
Manager and the Information Agent) for soliciting tenders of Shares pursuant to
the Offer.

                    The Information Agent for the Offer is:

                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                         (212) 269-5550 (Call Collect)
                           (800) 829-6551 (TOLL FREE)

                      The Dealer Manager for the Offer is:

                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
                                277 Park Avenue
                            New York, New York 10172
                    Telephone (212) 892-7700 (Call Collect)

May 8, 1996


<PAGE>   1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
    GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER. -- Social Security numbers have nine digits separated by two hyphens:
i.e. 000-00-0000. Employer identification numbers have nine digits separated by
only one hyphen: i.e. 00-0000000. The table below will help determine the number
to give the payer.
 
- ------------------------------------------------------------------
 
<TABLE>
<C>  <S>                                   <C>
     FOR THIS TYPE OF ACCOUNT:             GIVE THE
                                           SOCIAL SECURITY
                                           NUMBER OF --

  1. An individual's account               The individual
  2. Two or more individuals (joint        The actual owner of the
     account)                              account or, if combined
                                           funds, any one of the
                                           individuals (1)
  3. Custodian and wife (joint account)    The actual owner of the
                                           account or, if joint funds,
                                           either person (1)
  4. Custodian account of a minor          The minor (2)
     (Uniform Gift to Minors Act)
  5. Adult and minor (joint account)       The adult or, if the minor
                                           is the only contributor,
                                           the minor (1)
  6. Account in the name of guardian or    The ward, minor, or
     committee for a designated ward,      incompetent person (3)
     minor, or incompetent person
  7. a The usual revocable savings trust   The grantor-trustee (1)
       account (grantor is also trustee)
     b So-called trust account that is     The actual owner (1)
     not a legal or valid trust under
       State law

     FOR THIS TYPE OF ACCOUNT:             GIVE THE EMPLOYER
                                           IDENTIFICATION
                                           NUMBER OF --

  8. Sole proprietorship account           The Owner (4)
  9. A valid trust, estate, or pension     Legal entity (Do not
     trust                                 furnish the identifying
                                           number of the personal
                                           representative or trustee
                                           unless the legal entity
                                           itself is not designated in
                                           the account title.) (5)
 10. Corporate account                     The Corporation
 11. Religious, charitable, or             The organization
     educational organization account
 12. Partnership account held in the       The partnership
     name of the business
 13. Association, club, or other tax-      The organization
     exempt organization
 14. A broker or registered nominee        The broker or nominee
 15. Account with the Department of        The public entity
     Agriculture in the name of a public
     entity (such as a State or local
     government, school district, or
     prison) that receives agricultural
     program payments
</TABLE>
 
- ------------------------------------------------------------------
(1) List first and circle the name of the person whose number you furnish.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Circle the ward's, minor's or incompetent person's name and furnish such
person's social security number.
(4) Show the name of the owner.
(5) List first and circle the name of the legal trust, estate, or pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.
 
OBTAINING A NUMBER
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service and apply for a
number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
Payees specifically exempted from backup withholding on ALL payments include the
following:
- - A corporation.
- - A financial institution.
- - An organization exempt from tax under section 501(a), or an individual
  retirement plan.
- - The United States or any agency or instrumentality thereof.
- - A State, the District of Columbia, a possession of the United States, or any
  subdivision or instrumentality thereof.
- - A foreign government, a political subdivision of a foreign government, or
  agency or instrumentality thereof.
- - An international organization or any agency, or instrumentality thereof.
- - A registered dealer in securities or commodities registered in the U.S. or a
  possession of the U.S.
- - A real estate investment trust.
- - A common trust fund operated by a bank under section 584(a).
- - An exempt charitable remainder trust, or a non-exempt trust described in
  section 4947(a)(1).
- - An entity registered at all times under the Investment Company Act of 1940.
- - A foreign central bank of issue.
 
    Payments of dividends and patronage dividends not generally subject to
backup withholding include the following:
- - Payments to nonresident aliens subject to withholding under section 1441.
- - Payments to partnerships not engaged in a trade or business in the U.S. and
  which have at least one nonresident partner.
- - Payments of patronage dividends where the amount received is not paid in
  money.
- - Payments made by certain foreign organizations.
- - Payments made to a nominee.
 
    Payments of interest not generally subject to backup withholding include the
following:
- - Payments of interest on obligations issued by individuals.
 
NOTE: You may be subject to backup withholding if this interest is $600 or more
and is paid in the course of the payer's trade or business and you have not
provided your correct taxpayer identification number to the payer.
- - Payments of tax-exempt interest (including exempt interest dividends under
  section 852).
- - Payments described in section 6049(b)(5) to nonresident aliens.
- - Payments on tax-free covenant bonds under section 1451.
- - Payments made by certain foreign organizations.
- - Payments made to a nominee.
 
Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYER, IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO
SIGN AND DATE THE FORM.
 
    Certain payments other than interest, dividends, and patronage dividends
that are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A (a),
6045, and 6050A.
 
PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to IRS. IRS uses the numbers for identification
purposes. Payers must be given the numbers whether or not recipients are
required to file tax returns. Payers must generally withhold 31% of taxable
interest, dividend, and certain other payments to a payee who does not furnish a
taxpayer identification number to a payer. Certain penalties may also apply.
 
PENALTIES
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. -- If you
fail to furnish your taxpayer identification number to a payer, you are subject
to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Falsifying certifications or
affirmations may subject you to criminal penalties including fines and/or
imprisonment.
(4) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS. -- If you fail to
include any portion of an includible payment for interest, dividends or
patronage dividends in gross income and such failure is due to negligence, a
penalty of 20% is imposed on any portion of any underpayment attributable to the
failure.
 
                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                   CONSULTANT OR THE INTERNAL REVENUE SERVICE

<PAGE>   1
                                                                    EXHIBIT C(1)

                              Shareholder Agreement

         This Shareholder Agreement is made as of November 7, 1991 (the
"Agreement") by and among Guaranty National Corporation, a Colorado corporation
("Guaranty"), Orion Capital Corporation, a Delaware corporation ("Orion"), and
certain of Orion's wholly-owned subsidiaries listed on Schedule I hereto that
currently hold all the outstanding Common Stock of Guaranty (collectively
referred to hereinafter as the "Selling Shareholders").

         WHEREAS, On September 13, 1991 Guaranty filed Registration Statement
No. 33-42781 on Form S-1 ("1991 Registration Statement") with the Securities
and Exchange Commission with respect to the public sale (the "Offering") of
approximately 7,187,500 shares (including up to 937,500 shares to be sold to
cover underwriters' over-allotment options) of Common Stock, par value $1.00 per
share ("Common Stock"), on behalf of the Selling Shareholders; and

         WHEREAS, upon the date of the initial closing ("Initial Closing") of
the Offering in accordance with its terms (such date referred to hereinafter as
the "Offering Closing Date"), Guaranty will become a public corporation with the
Selling Shareholders retaining no more than 49.6% shares of the outstanding
Guaranty Common Stock (excluding the underwriters' over-allotment options) (such
shares of Guaranty Common Stock owned by Selling Shareholders or transferred to
any other wholly-owned subsidiary of Orion or to any other purchaser from a
Selling Shareholder not pursuant to a registered public offering after the
Offering Closing Date are referred to hereinafter as the "Sellers Stock"); and

         WHEREAS, prior to the Offering Closing Date, pursuant to a Note
Issuance Agreement of even date herewith, Guaranty will issue in the aggregate
approximately $20,896,000 principal amount of its 9 1/2% subordinated notes due
1998 (hereinafter referred to as the "Guaranty Notes"), including $19,829,000 of
such Guaranty Notes as a special dividend to the Selling Shareholders and
$1,067,000 of such Guaranty Notes to repurchase certain fixed assets from
another wholly-owned subsidiary of Orion;

         NOW, THEREFORE, in consideration of the promises and the mutual
covenants and agreements, and subject to the terms and considerations set forth
herein, the parties hereto agree as follows:

         1.       Board of Directors of Guaranty.

                  1.1      Membership on the Board of Directors Selection of
                           Chairman and Committees

                  (a) Immediately prior to the effectiveness of the Initial
Closing of the Offering on the Offering Closing Date, Messrs. Vincent T. Papa
and Raymond J. Schuyler, each a senior officer of Orion, shall tender his
resignation from the Guaranty Board of Directors and Mr. Roger B. Ware will
tender his resignation as a Senior Vice President of Orion, all effective as of
the completion of the Initial Closing on the Offering Closing Date. Upon
completion of the Initial Closing on the Offering Closing Date, the remaining
Guaranty Board members shall take action to increase the number of the members
<PAGE>   2
of the Guaranty Board of Directors from six to seven and shall elect Messrs.
Carroll D. Speckman, Richard R. Thomas and William J. Shepherd (as described in
the 1991 Registration Statement), to fill the vacancies on the Board created by
the resignations and the increase in the size of its membership. Messrs.
Speckman, Thomas and Shepherd shall serve as members of Guaranty's Board until
(i) the next annual or special meeting of shareholders of Guaranty following the
Offering Closing Date at which shareholders are entitled to vote on the election
of the members to the Guaranty Board and (ii) until their successors are elected
and shall qualify.

                  (b) Upon completion of the Initial Closing and after the
Offering Closing Date, and for as long as Orion and/or any of Orion's
wholly-owned subsidiaries shall beneficially own, in the aggregate, at least 20
percent of the outstanding Common Stock (including securities convertible or
exchangeable into Common Stock or other securities having voting rights on a par
with the Common Stock referred to hereinafter as Convertible Securities),
Orion, Guaranty and the Selling Shareholders agree that the Board of Directors
of Guaranty shall consist of seven members. Nominees for such seven
directorships shall be designated as follows: (i) three nominees shall be
designated by Orion and its wholly-owned subsidiaries owning Sellers Stock
("Orion Nominees"), (ii) two nominees shall be officers of Guaranty, and (iii)
two nominees shall be nominees mutually agreeable to Orion and Guaranty who are
persons who are not (x) officers, directors or employees of Orion or its
wholly-owned subsidiaries, or (y) officers or employees of Guaranty or its
wholly-owned subsidiaries ("Independent Nominees"). Notwithstanding the
foregoing, if the aggregate beneficial ownership of the Common Stock (including
any Convertible Securities) held by Orion and/or any of its wholly-owned
subsidiaries is less than 30 percent of the outstanding Common Stock (including
any Convertible Securities) then, with respect to the next annual or special
meeting of Guaranty shareholders to be held for the election of directors,
following the date on which such ownership fell below 30 percent but remains in
excess of 20 percent, the number of nominees to the Guaranty Board of Directors
that Orion and the Selling Shareholders have a right to designate pursuant to
this Section 1.1 shall be reduced to two.

                  (c) After the Offering Closing Data and for so long as Orion
and/or any of its wholly-owned subsidiaries beneficially own, in the aggregate,
at least 30 percent of the outstanding Common Stock (including any Convertible
Securities) the Chairman of the Board of Guaranty shall be selected by the Orion
Nominees on the Guaranty Board. As of the Offering Closing Date, the Chairman of
Guaranty shall be Alan R. Gruber.

                  (d) After the Offering Closing Date and for so long as Orion
and/or any of its wholly-owned subsidiaries beneficially own, in the aggregate,
at least 20 percent of the outstanding Common Stock (including any Convertible
Securities) (i) the Executive Committee of Guaranty shall be composed of the
Chairman of the board of Guaranty, the President of Guaranty and one of the
Independent Nominees (ii) the Compensation Committee of Guaranty shall include
the Orion Nominees and (iii) the Audit Committee of Guaranty shall include the
two Independent Nominees.

                  (e) For so long as Orion and/or any of Orion's wholly-owned
subsidiaries shall beneficially own, in the aggregate, at least 20 percent of
the outstanding Common Stock (including any Convertible Securities) , Guaranty
shall use its best efforts to (i) have the Orion Nominees elected to the Board
of Directors at each annual or special meeting of shareholders of Guaranty,
commencing with the annual meeting of shareholders of Guaranty next following
the Offering Closing Date, and (ii) cause to be voted all the outstanding shares
of Common Stock entitled to be voted at such meetings in favor of the election
of such Orion Nominees. In the event that any Orion Nominee on the Board of
Directors shall cease to serve as a director for any reason during the period
that this Section 1.1(e) is in effect,


                                      - 2 -
<PAGE>   3
Guaranty shall use its best efforts to cause the vacancy resulting thereby to be
filled by another Orion Nominee.

                  (f) Notwithstanding any of the foregoing, nothing shall
prevent Guaranty's directors or officers, acting individually or collectively,
from taking any action in contravention of the terms of this Section 1.1 if
Guaranty has received a written opinion from outside legal counsel reasonably
satisfactory to Orion stating that unless such action is taken such director or
officer would be materially violating such director's or officer's fiduciary
duties to Guaranty and its shareholders.

         1.2 Information to Directors. Guaranty shall furnish to the Orion
Nominees serving on Guaranty's Board of Directors all information that is
provided to the other directors of Guaranty in their capacities as such.

         2.       Registration Rights.

                  2.1 Required Registration - Sellers Stock. (a) For a period of
six years after the Offering Closing Date, if and whenever Guaranty receives a
written request from the registered owners of more than 20% of Sellers Stock,
Guaranty shall prepare and file with the Securities and Exchange Commission (the
"Commission") a registration statement under the Securities Act of 1933, as
amended ("Securities Act"), on the appropriate form or forms, covering the
offering of the number of shares of Sellers Stock which are the subject of such
request. Guaranty shall use its best efforts to cause such registration
statement to become effective. Notwithstanding the foregoing, however, Guaranty
shall not be required to effect more than one registration under this Section
2.1 during any twelve-month period. Guaranty shall be obligated, however, in any
event, to prepare, file and cause to become effective up to three registration
statements pursuant to this Section 2. Guaranty shall not be required to effect
a registration under this Section 2.1 which involves the sale of Sellers Stock
(a) with an aggregate sale price (before deductions of underwriting discounts
and expenses of sale) of less than $10,000,000 or (b) that, in the written
opinion, which is reasonably acceptable to the beneficial owners of the Sellers
Stock, of securities counsel to Guaranty, that the Sellers Stock which is
requested to be registered may be, as of the date of such opinion, publicly
offered, sold and distributed without registration under the Securities Act
(without any restrictions as to volume or the potential purchaser's financial
sophistication or net worth), provided further that Orion and the beneficial
owners of such Sellers Stock are permitted to rely on such opinion. Without the
written consent of 50 percent of the beneficial owners of the Sellers Stock that
have requested such demand registration, neither Guaranty nor any other holder
of securities of Guaranty may include securities in such demand registration;
provided, however, that if a registration pursuant to this Section 2.1 is to
involve a fully underwritten public offering of Sellers Stock, Guaranty may
include securities in such registration if, but only if, the managing
underwriter of such public offering concludes, in the exercise of its good faith
judgment, that such inclusion will not adversely affect the successful marketing
or reduce the expected selling price of the Sellers Stock in such public
offering. The managing underwriter or underwriters of any underwritten public
offering requested pursuant to this Section 2.1 shall be a firm of national
reputation selected by the beneficial owners of the Sellers Stock with the
consent of Guaranty, which consent shall not be unreasonably withheld.

                  (b) Orion or any of the Selling Shareholders may assign any or
all of its rights to cause Guaranty to effect a registration pursuant to this
Section 2.1 and Section 2.2 below to any wholly-owned subsidiary of Orion or, on
prior notice to Guaranty, to any other transferee from a Selling Shareholder,
provided that such purchaser agrees in writing to be bound by the terms hereof
as though it were Orion or a Selling Shareholder.


                                      - 3 -
<PAGE>   4
                  (c) Guaranty may grant subsequent investors rights of
registration upon request and rights of incidental registration (such as those
provided in Section 2 hereof); provided, however, that in the case of such
rights granted to subsequent investors (i) such rights are not inconsistent with
the provisions of this Agreement and (ii) the instrument granting such rights
specifically confirms the prior rights of the holders of the Sellers Stock or
Guaranty Notes under this Agreement.

                  2.2 Required Registration - Guaranty Notes. For a period of
six years after the Offering Closing Date, if and whenever Guaranty receives a
written request from the holders of $10,000,000 or more, in aggregate principal
amount, of the Guaranty Notes ("Guaranty Note Holders"), Guaranty shall prepare
and file with the Commission a registration statement under the Securities Act
on the appropriate form or forms, covering the offering of the principal amount
of the Guaranty Notes which is the subject of such request. Guaranty shall use
its best efforts to cause such registration statement to become effective;
provided, however, that Guaranty shall not be required to effect such
registration if in the written opinion, which is reasonably acceptable to the
Guaranty Note Holders, of securities counsel to Guaranty, the Guaranty Notes
requested to be registered may be, as of the date of such opinion, publicly
offered, sold and distributed without registration under the applicable federal
securities laws, provided further, that the beneficial owners of such Guaranty
Notes are permitted to rely on such opinion. Guaranty shall be obligated to
prepare, file and cause to become effective only one Registration Statement
pursuant to this Section 2.2. Without the written consent of the holders of 50%
in the aggregate principal amount of the Guaranty Notes to be so offered to the
public, neither Guaranty nor any holder of securities of Guaranty may include
securities in such registration; provided, however, that if a registration
pursuant to this Section 2.2 is to involve a fully underwritten public offering
of such Guaranty Notes, Guaranty may include securities in such registration if,
but only if, the managing underwriter of such public offering concludes, in the
exercise of its good faith judgment, that such inclusion will not adversely
affect the successful marketing or reduce the expected selling price of the
Guaranty Notes in such public offering. The managing underwriter or underwriters
of any underwritten public offering requested pursuant to this Section 2.2 shall
be a firm of national reputation selected by the holders of 50% in the aggregate
principal amount of the Guaranty Notes to be so offered to the public, with the
consent of Guaranty, which consent shall not be unreasonably withheld.

                  2.3 Incidental Registration. For a period of six years after
the Offering Closing Date, each time Guaranty shall determine or be required to
file a registration statement under the Securities Act (other than on Form S-8
or a successor form thereto) in connection with the proposed offer and sale for
cash of any of its securities by it or any of its security holders (other than
the beneficial owners of the Sellers Stock), Guaranty will promptly give written
notice of such determination or requirement to the beneficial owners of the
Sellers Stock. Upon the written registration request of the beneficial owners of
Sellers Stock with a potential aggregate sale price of at least $1,000,000 given
within 30 days after the date of any such notice by Guaranty, Guaranty will
cause all shares of Sellers Stock for which the beneficial owners of Sellers
Stock have requested registration to be included in such registration statement.
If any registration pursuant to this Section 2.3 is to be underwritten in whole
or in part, Guaranty shall use its best efforts to cause the Sellers Stock
requested for inclusion pursuant to this Section 2.3 to be included in the
underwriting on the same terms and conditions as the securities otherwise being
sold through the underwriters. If, in the good faith judgment of the managing
underwriter of such public offering (which underwriters shall be a firm of
national reputation), the inclusion of all of the Sellers Stock requested to be
registered pursuant to this Section 2.3 and of all of the Common Stock or other
securities of Guaranty requested to be registered by other securityholders of
Guaranty with respect to such registration statement would adversely affect the
successful marketing of the securities to be offered by Guaranty or its
securityholders (other than the beneficial owners of the


                                      - 4 -
<PAGE>   5
Sellers Stock), as the case may be, then the maximum number of shares of Common
Stock which the managing underwriter will permit the beneficial owners of the
Sellers Stock and such other securityholders to include in the offering (in
addition to the shares to be offered by Guaranty) shall be pro rated among the
beneficial owners of the Sellers Stock and such other securityholders.

                  2.4 Registration Procedures. If and whenever Guaranty is
required by the provisions of Section 2.1, 2.2 or 2.3 to effect the registration
of shares of Sellers Stock or Guaranty Notes, Guaranty will:

                  (a) Prepare and file with the Commission a registration
         statement on the appropriate form or forms with respect to such
         securities and use its best efforts to cause such registration
         statement to become and remain effective for at least 90 days
         thereafter, and prepare and file with the Commission such amendments or
         supplements as may be necessary to keep such registration statement
         effective for at least 90 days after the effective date of the
         registration statement.

                  (b) Enter into a written underwriting agreement or agreements
         in form and substance reasonably satisfactory to the managing
         underwriter or underwriters of the public offering of such securities,
         if the offering is to be underwritten in whole or in part.

                  (c) Furnish to the beneficial owners of the Sellers Stock or
         the Guaranty Note Holders, as the case may be, such reasonable number
         of copies of the registration statement, preliminary prospectus, final
         prospectus and such other documents as may reasonably be requested in
         order to facilitate the public offering of such securities.

                  (d) Use its best efforts to register or qualify the securities
         covered by such registration statement under such state securities or
         blue sky laws of such jurisdictions as the beneficial owners of the
         Sellers Stock or the Guaranty Note Holders, as the case may be, may
         reasonably request, except that Guaranty shall not for any purpose be
         required to execute a general consent to service of process or to
         qualify to do business as a foreign corporation in any jurisdiction
         where it is not so qualified.

                  (e) Notify the beneficial owners of the Sellers Stock or the
         Guaranty Note Holders, as the case may be, promptly after it shall
         receive notice thereof, of the time when such registration statement
         has become effective or an amendment or a supplement to any
         registration or prospectus forming a part of such registration
         statement has been filed.

                  (f) Notify the beneficial owners of the Sellers Stock or the
         Guaranty Note Holders, as the case may be, promptly of any request by
         the Commission for the amending or supplementing of such registration
         statement or prospectus or for additional information.

                  (g) Prepare and file with the Commission promptly, upon the
         request of the beneficial owners of the Sellers Stock or the Guaranty
         Note Holders, as the case may be, any amendments or supplements to such
         registration statement or prospectus which, in the opinion of counsel
         for the beneficial owners of the Sellers Stock or the Guaranty Note
         Holders, as the case may be, are required under the applicable federal
         securities laws or the rules and regulations thereunder in connection
         with the distribution of the Sellers Stock or Guaranty Notes.


                                      - 5 -
<PAGE>   6
                  (h) Prepare and promptly file with the Commission, and
         promptly notify the beneficial owners of the Sellers Stock or the
         Guaranty Note Holders, as the case may be, of the filing of, such
         amendment or supplement to such registration statement or prospectus as
         may be necessary to correct any statements in, or omissions from, such
         registration statement, if, at the time when a prospectus relating to
         such securities is required to be delivered under any applicable
         federal securities laws, any event has occurred as the result of which
         any such prospectus or any other prospectus as then in effect would
         include an untrue statement of a material fact or omit to state any
         material fact necessary to make the statements therein not misleading
         in the light of the circumstances in which they were made.

                  (i) In the event the beneficial owners of the Sellers Stock or
         Guaranty Note Holders, as the case may be, or any underwriter for the
         beneficial owners of the Sellers Stock, or the Guaranty Note Holders,
         as the case may be, is required to deliver a prospectus at a time when
         the prospectus then in effect may no longer be used under applicable
         federal securities laws, prepare promptly upon request of the
         beneficial owners of the Sellers Stock or Guaranty Note Holders, as the
         case may be, such amendments or supplements to such registration
         statement and such prospectus as may be necessary to permit compliance
         with the requirements of applicable federal securities laws.

                  (j) Advise the beneficial owners of the Sellers Stock or the
         Guaranty Note Holders, as the case may be, promptly after it shall
         receive notice or obtain knowledge thereof, of the issuance of any stop
         order by the Commission suspending the effectiveness of such
         registration statement or the initiation or threatening of any
         proceeding for that purpose and promptly use its best efforts to
         prevent the issuance of any stop order or to obtain its withdrawal if
         such stop order should be issued.

                  (k) Not file any amendment or supplement to such registration
         statement or prospectus to which any of the beneficial owners of the
         Sellers Stock or the Guaranty Note Holders, as the case may be,
         reasonably objects on the ground that such amendment or supplement does
         not comply in all material respects with the requirements of any
         applicable federal securities law or the rules and regulations
         thereunder, after having been furnished with a copy thereof at least
         five business days prior to the filing thereof.

                  (l) At the request of the beneficial owners of the Sellers
         Stock or the Guaranty Note Holders, as the case may be, furnish on the
         effective date of the registration statement and, if such registration
         involves an underwritten public offering, at the closing provided for
         in the underwriting agreement, (i) an opinion of the counsel
         representing Guaranty (such counsel being reasonably satisfactory to
         the beneficial owners of the Sellers Stock or Guaranty Note Holders, as
         the case may be), for the purposes of such registration, addressed to
         the underwriters, if any, and to the beneficial owners of the Sellers
         Stock or the Guaranty Note Holders, as the case may be, covering such
         matters with respect to the registration statement, the prospectus and
         each amendment or supplement thereto, proceedings under state and
         federal securities laws, other matters relating to Guaranty, the
         securities being registered and the offer and sale of such securities
         as are customarily the subject of opinions of issuer's counsel provided
         to underwriters in underwritten public offerings, and (ii) a letter
         dated each such date, from the independent certified public accountants
         of Guaranty addressed to the underwriters, if any, and to the
         beneficial owners of the Sellers Stock or the Guaranty Note Holders, as
         the case may be, stating that they are independent certified public
         accountants within the meaning of the applicable federal


                                      - 6 -
<PAGE>   7
         securities laws and that, in the opinion of such accountants, the
         financial statements and other financial data of Guaranty included in
         the registration statement or the prospectus or any amendment or
         supplement thereto comply in all material respects with the applicable
         accounting requirements of the applicable federal securities laws, and
         additionally covering such other financial matters, including
         information as to the period ending not more than five business days
         prior to the date of such letter and with respect to the registration
         statement and the prospectus, as the underwriters or the beneficial
         owners of the Sellers Stock or the Guaranty Note Holders, as the case
         may be, may reasonably request.

                  (m) Refrain from making any sale or distribution of its voting
         securities, except pursuant to any employee stock plan and any
         pre-existing agreement for the sale of such securities, during the
         period commencing seven days prior to, and expiring 120 days after, the
         registration statement has become effective.

                  2.5      Expenses.

                  (a) With respect to the first two registrations to be effected
         pursuant to Section 2.1 and the registration to be effected pursuant to
         Section 2.2 hereof, all out-of pocket fees, costs and expenses of and
         incidental to such registration and public offering in connection
         therewith shall be borne by Guaranty.

                  (b) With respect to any third registration to be effected
         pursuant to Section 2.1 hereof or with respect to the inclusion of
         shares of Sellers Stock in a registration statement pursuant to Section
         2.3 hereof, all the fees, costs and expenses of such registration under
         Section 2.1 and the additional fees costs and expenses as may be
         incurred as a result of the exercise of rights under Section 2.3 hereof
         shall be born by the beneficial owners of Sellers Stock being so
         registered.

                  (c) The fees, costs and expenses of registration to be borne
         as provided in Section 2.5 (a) above shall include, without limitation,
         all registration, filing and National Association of Security Dealers'
         fees, printing expenses, fees and disbursements of counsel and
         accountants for Guaranty, fees and disbursements of underwriters of
         such securities, all legal fees and disbursements and other expenses of
         complying with state securities or blue sky laws of any jurisdictions
         in which the securities to be offered are to be registered or
         qualified, and premiums and other costs of policies of insurance
         against liability arising out of such public offering, but not the fees
         and disbursements of counsel and accountants for the beneficial owners
         of the Sellers Stock or Guaranty Note Holders, as the case may be.

                  2.6      Indemnification.

                  (a) Guaranty will indemnify and hold harmless each of the
         beneficial owners of the Sellers Stock or Guaranty Note Holders and any
         underwriter (as defined in the Securities Act) for the beneficial
         owners of the Sellers Stock or Guaranty Note Holders, and each person
         who is an officer or director of or who controls the beneficial owners
         of the Sellers Stock, the holders of Guaranty Notes or such underwriter
         within the meaning of the Securities Act, from and against, and will
         reimburse the beneficial owners of the Sellers Stock, Guaranty Note
         Holders and each such underwriter and person with respect to, any and
         all claims, actions, demands, losses, damages, liabilities, attorneys'
         fees, costs and other expenses to which the beneficial owners of the
         Sellers Stock, Guaranty Note Holders or any such underwriter or
         controlling


                                      - 7 -
<PAGE>   8
         person may become subject under the Securities Act or otherwise,
         insofar as such claims, actions, demands, losses, damages, liabilities,
         costs, attorneys' fees or other expenses arise out of or are based upon
         any untrue statement or alleged untrue statement of any material fact
         contained in such registration statement, any prospectus contained
         therein or any amendment or supplement thereto, or arise out of or are
         based upon the omission or alleged omission to state therein or
         necessary to make the statements therein, in light of the circumstances
         in which they were made, not misleading; provided, however, that
         Guaranty will not be liable in any such case to the extent that any
         such claim, action, demand, loss, damage, liability, cost, attorneys'
         fees or other expense is caused by an untrue statement or alleged
         untrue statement or omission or alleged omission so made in strict
         conformity with information furnished by the beneficial owners of the
         Sellers Stock or any Guaranty Note Holders, such underwriter or such
         controlling person in writing specifically for use in the preparation
         thereof.

                  (b) Each of the beneficial owners of the Sellers Stock or
         Guaranty Note Holder that are to be included in any registrations under
         this Agreement will indemnify and hold harmless Guaranty, and any
         underwriter (as defined in the Securities Act) for Guaranty, and each
         person who is an officer or director of or who controls Guaranty or
         such underwriter within the meaning of the Securities Act, from and
         against, and will reimburse Guaranty with respect to, any and all
         claims, actions, demands, losses, damages, liabilities, costs or
         expenses to which Guaranty may become subject under the Securities Act
         or otherwise, insofar as such claims, actions, demands, losses,
         damages, liabilities, costs, attorneys' fees or other expenses are
         caused by any untrue or alleged untrue statement of any material fact
         contained in such registration statement, any prospectus contained
         therein or any amendment or supplement thereto, or are caused by the
         omission or the allege omission to state therein a material fact
         required to be stated therein or necessary to make the statements
         therein. in light of circumstances in which they are made, not
         misleading, in each case to the extent, but only to the extent, that
         such untrue statement or alleged untrue statement or omission or
         alleged omission vas so made in reliance upon and in strict conformity
         with written information furnished by a beneficial owner of the Sellers
         Stock or Guaranty Note Holders specifically for use in the preparation
         thereof.

                  (c) Promptly after receipt by an indemnified party pursuant to
         the provisions of paragraphs (a) or (b) of this Section 2.6 of notice
         of commencement of any action involving he subject matter of the
         foregoing indemnity provisions, such indemnified party will, if a claim
         thereof is to be made against the indemnifying party pursuant to the
         provisions of paragraphs (a) and (b), notify the indemnifying party of
         the commencement hereof, but the omission so to notify the indemnifying
         party will not relieve it from any liability which it may have to an
         indemnified party otherwise than under this Section 2.6. In case such
         action is brought against any indemnified party and it notifies the
         indemnifying party of the commencement thereof, the indemnifying party
         shall have the right to participate in and, to the extent that it may
         wish, assume the defense thereof, with counsel reasonably satisfactory
         to such indemnified party, and after notice from the indemnifying party
         to such indemnified party of its election so to assume the defense
         thereof, the indemnifying party will not be liable to such indemnified
         party pursuant to the provisions of paragraphs (a) and (b) for any
         legal or other expense subsequently incurred by such indemnified party
         in connection with the defense thereof, other than reasonable costs of
         investigation. No indemnifying party shall be liable to an indemnified
         party for any settlement of any action or claim without the consent of
         the indemnifying party.


                                      - 8 -
<PAGE>   9
                  2.7 Reporting Requirements Under the Securities Exchange Act
of 1934. Guaranty shall take such reasonable measures, and shall file such other
information, documents and reports as shall be required by the Commission as a
condition to the availability of Rule 144 under the Securities Act (or any
similar exemptive provision hereafter in effect) and the use of Form S-3.
Guaranty also covenants to use its best efforts, to the extent that it is
reasonably within its power to do so, to qualify for the use of Form S-3.

                  2.8 Standoff. Orion and the Selling Shareholders agree in
connection with any underwritten public offering of Guaranty's securities that,
upon the request of the managing underwriter of such public offering, it shall
commit itself not to offer or sell publicly any Sellers Stock, or Guaranty
Notes, other than such stock or Guaranty Notes included in a public offering,
for a period not to exceed 120 days from the closing of such public offering.

         3.       Miscellaneous.

                  3.1 Governing Law. This Agreement shall be governed in all
respects by the Laws of the State of Colorado as applied to contracts entered
into solely between residents of, and to be performed entirely within, such
state.

                  3.2 Successors and Assigns. Except as otherwise expressly
provided herein, the rights and duties of this Agreement may not be assigned.
The Selling Shareholders, however, without prior notice to Guaranty, may assign
their rights and duties hereunder to other wholly-owned subsidiaries of Orion.

                  3.3 Entire Agreement: Amendment. This Agreement constitutes
the full and entire understanding and agreement among the parties with regard to
the subjects hereof and thereof and supersedes all prior agreements and
understandings between the parties relating the subject matter hereof. Any term
of this Agreement may be amended, discharged or terminated and the observance of
any term of this Agreement may be waived (either generally or in a particular
instance and either retroactively or prospectively), only by a written
instrument signed by the party against whom enforcement of any such amendment,
discharge, termination or waiver is sought.

                  3.4 Notices. All notices and other communications required or
permitted hereunder shall be in writing and shall be delivered either by (i)
personal delivery, (ii) postage prepaid, return receipt requested certified mail
(air-mail, if available), or the equivalent of certified mail under the laws of
the country where mailed; (iii) facsimile transmission, or (iv) telex with
confirmed answerback received, addressed as follows:

                  Guaranty:         Guaranty National Corporation
                                    100 Inverness Terrace East
                                    Englewood, CO  80112
                                    Attention: Mr. Roger B. Ware
                                               President
                                    Facsimile: (303) 790-7136

                  Copy to:          Holmes & Starr
                                    1600 Broadway, 26th Floor
                                    Denver, CO  80202-4926


                                      - 9 -
<PAGE>   10
                                    Attention:       Hardin Holmes, Esq.
                                    Facsimile:       (303) 839-4380

                  Orion and         Orion Capital Corporation
                  Selling           30 Rockefeller Plaza, Rm.  2820
                  Shareholders:     New York, NY  10112
                  Attention:        Alan R. Gruber
                                    Chairman
                  Facsimile:        (212) 581-7261

                  Copy to:          Donovan Leisure Newton & Irvine
                                    30 Rockefeller Plaza
                                    New York, NY  10112
                  Attention:        Robert Hart, Esq.
                  Facsimile:        (212)

         Any party may change its address for such communications by giving
notice thereof to the other party in conformity with this section.

                  3.5 Delays or Omissions. No delay or omission to exercise any
right, power or remedy accruing to any party hereto upon any breach or default
of any other party under this Agreement shall impair any such right, power or
remedy of such party nor shall it be construed to be a waiver of any such breach
or default, or an acquiescence therein, or of or in any similar breach or
default thereafter occurring; nor shall any waiver of any single breach or
default be deemed a waiver or any other breach or default theretofore or
thereafter occurring. Any waiver, permit, consent or approval of any kind or
character on the part of any party of any breach or default under this
Agreement, or any waiver on the part of any party of any provisions or
conditions of this Agreement, must be in writing and shall be effective only to
the extent specifically set forth in such writing.

                  3.6 Remedies: Specific Performance. All remedies either under
this Agreement, or by law or otherwise afforded to the parties hereunder, shall
be cumulative and not alternative. In addition to any remedies available at law
for any breach or failure to perform any obligation under this Agreement, the
parties intend and agree that the provisions of this Agreement shall be
specifically enforceable in any court having appropriate jurisdiction therefor
and that the parties hereto shall be entitled to injunctive and other equitable
relief for any such breach or failure to perform.

                  3.7 Severability of Provisions. If any term, provision,
covenant or restriction of this Agreement is held by a court of competent
jurisdiction to be invalid, void or unenforceable, the remainder of the terms,
provisions, covenants and restrictions of this Agreement shall remain in full
force and effect and shall in no way be effected, impaired or invalidated to the
extent permitted by applicable law.

                  3.8 Titles and Subtitles. The titles of the paragraphs and
subparagraphs of this Agreement are for convenience of reference only and are
not to be considered in construing this Agreement.

                  3.9 Counterparts.. This Agreement may be executed in
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.


                                     - 10 -
<PAGE>   11
         IN WITNESS WHEREOF, each of the parties hereto duly authorized
thereunto, has executed this Agreement as of the day and year set forth in the
heading hereof.

                                       GUARANTY NATIONAL CORPORATION

                                       By:
                                          --------------------------------------

                                       ORION CAPITAL CORPORATION

                                       By:
                                          --------------------------------------
                                                    Alan R. Gruber
                                           Chairman and Chief Executive Officer

                                       THE CONNECTICUT INDEMNITY COMPANY

                                       CONNECTICUT SPECIALTY INSURANCE COMPANY

                                       DESIGN PROFESSIONALS INSURANCE COMPANY

                                       EMPLOYEE BENEFITS INSURANCE COMPANY

                                       THE FIRE & CASUALTY INSURANCE COMPANY
                                           OF CONNECTICUT

                                       SECURITY INSURANCE COMPANY OF HARTFORD

                                       SECURITY REINSURANCE COMPANY

                                       By:
                                          --------------------------------------
                                                   Raymond J. Schuyler
                                             Senior Vice President-Investments


                                     - 11 -

<PAGE>   1
                                                                    EXHIBIT C(2)

                       AMENDMENT TO SHAREHOLDER AGREEMENT

               This Amendment Agreement (the "Amendment") is made as of February
2, 1994, by and among Guaranty National Corporation, a Colorado corporation
("Guaranty"), Orion Capital Corporation, a Delaware corporation ("Orion"), and
the wholly owned subsidiaries of Orion (the "Selling Shareholders") listed on
Schedule I to the Shareholder Agreement dated as of November 7, 1991 (the
"Shareholder Agreement"), among Guaranty, Orion and the Selling Shareholders.

               WHEREAS, the parties have determined that it would be in their
mutual best interests to provide for a further increase in the number of
independent directors of Guaranty,

               NOW THEREFORE, in consideration of the premises and the mutual
covenants and agreements, and subject to the terms and considerations set forth
herein, the parties hereto agree as follows:

               1. Section 1.1(b) of the Shareholder Agreement is hereby amended
so as to provide in the end of the first sentence thereof that "the Board of
Directors of Guaranty shall consist of ten members." Clause (iii) of the second
sentence thereof is hereby amended to provide that the Board of Directors of
Guaranty shall include "up to five nominees . . . mutually agreeable to Orion
and Guaranty . . . "

               2. Except as expressly provided herein, the Shareholder Agreement
shall continue in full force and effect.

               IN WITNESS WHEREOF, each of the parties hereto duly authorized
thereUnto has executed this Agreement as of the day and year set forth in the
heading hereof.

                                             GUARANTY NATIONAL CORPORATION

                                             By:  /s/ Michael L. Pautler

                                                       Michael L. Pautler
                                                       Senior Vice President

                                             ORION CAPITAL CORPORATION

                                             By: /s/ Michael P. Mahoney

                                                     Michael P. Mahoney
                                                     Vice President
<PAGE>   2
                                             THE CONNECTICUT INDEMNITY COMPANY

                                             CONNECTICUT SPECIALTY INSURANCE
                                             COMPANY

                                             DESIGN PROFESSIONALS INSURANCE
                                             COMPANY

                                             EMPLOYEE BENEFITS INSURANCE
                                             COMPANY

                                             THE FIRE & CASUALTY INSURANCE
                                             COMPANY OF CONNECTICUT

                                             SECURITY INSURANCE COMPANY OF
                                             HARTFORD

                                             SECURITY REINSURANCE COMPANY

                                             By: /s/ Michael P. Mahoney
                                                 ----------------------
                                                      Michael P. Mahoney
                                                      Vice President


                                        2

<PAGE>   1
                                                                    EXHIBIT C(3)

                       AMENDMENT TO SHAREHOLDER AGREEMENT

         This Amendment Agreement (the "Amendment") is made as of March 2, 1995,
by and among Guaranty National Corporation, a Colorado corporation ("Guaranty"),
Orion Capital Corporation, a Delaware corporation ("Orion"), and the wholly
owned subsidiaries of Orion (the "Selling Shareholders") listed on Schedule I to
the Shareholder Agreement dated as of November 7, 1991 (the "Shareholder
Agreement"), among Guaranty, Orion and the Selling Shareholders.

         WHEREAS, the parties have determined that it would be in their mutual
best interests to provide for a further increase in the number of independent
directors of Guaranty,

         NOW THEREFORE, in consideration of the premises and the mutual
covenants and agreements, and subject to the terms and considerations set forth
herein, the parties hereto agree as follows:

         1. Section 1.1(b) of the Shareholder Agreement is hereby further
amended so as to provide at the end of the first sentence thereof that ". . .
the Board of Directors of Guaranty shall consist of eleven members." (Emphasis
added.) The second sentence thereof is hereby amended to provide that "Nominees
for such eleven directorships shall be designated as follows: . . . . (iii) up
to six nominees shall be nominees mutually agreeable to Orion and Guaranty who
are not (x) officers, directors or employees of Orion or its wholly-owned
subsidiaries, other than one such nominee who is a retired officer and director
of Orion but who is still an employee of Orion, or (y) . . . 11 (Emphasis
added.)

         2. Except as expressly provided herein, the Shareholder Agreement shall
continue in full force and effect.

         IN WITNESS WHEREOF, each of the parties hereto duly authorized
thereinto, has executed this Agreement as of the day and year set forth in the
heading hereof.

                                             GUARANTY NATIONAL CORPORATION

                                             By:  /s/ Roger Ware
                                                  --------------
                                                       Roger Ware

                                             ORION CAPITAL CORPORATION

                                             By:  /s/ Alan R. Gruber
                                                  ------------------
                                                       Alan R. Gruber

                                             THE CONNECTICUT INDEMNITY COMPANY

                                             CONNECTICUT SPECIALTY INSURANCE
                                             COMPANY
<PAGE>   2
                                             DESIGN PROFESSIONALS INSURANCE
                                             COMPANY

                                             EMPLOYEE BENEFITS INSURANCE
                                             COMPANY

                                             THE FIRE &: CASUALTY INSURANCE
                                             COMPANY OF CONNECTICUT

                                             SECURITY INSURANCE COMPANY OF
                                             HARTFORD

                                             SECURITY REINSURANCE COMPANY


                                             By:  /s/ Vincent T. Papa
                                                  -------------------
                                                       Vincent T. Papa
                                                       Senior Vice President


                                        2

<PAGE>   1
                                                                    EXHIBIT C(4)

                             NOTE ISSUANCE AGREEMENT
                   AS AMENDED AND RESTATED AS OF JUNE 14, 1995

                NOTE ISSUANCE AGREEMENT, dated as of November 7, 1991, as
amended as of August 1, 1993 and as further amended as of June 14, 1995 (as so
amended, the "Agreement"), by and among Guaranty National Corporation, a
Colorado corporation (the "Company"), Orion Capital Corporation, a Delaware
corporation ("Orion"), and certain wholly owned subsidiaries of Orion named on
the signature page of this Agreement (collectively, the "Orion Subsidiaries").

                WHEREAS, the Company, Orion and the Orion Subsidiaries
originally entered into this Agreement so as to confirm their mutual
understanding with respect to the issuance of the promissory notes in 1991; and

                WHEREAS, in 1993 the Company, Orion and the Orion Subsidiaries
revised in 1993 certain terms of the Notes, including the maturity date and the
interest rate, and the Agreement pursuant to which the Notes were issued; and

                WHEREAS, the Company, Orion and the Orion Subsidiaries desire to
add certain terms to the Notes, including a conversion feature;

                NOW, THEREFORE, in consideration of the premises and the mutual
covenants, agreements and provisions contained herein, the Company, Orion and
the Orion Subsidiaries hereby agree as follows:

                                    ARTICLE I

                       AUTHORIZATION AND ISSUANCE OF NOTES

         0.1 AUTHORIZATION OF ISSUE. The Company has duly authorized the
issuance of its 7.85% Subordinated Notes due July 1, 2003 (the "Notes") in the
aggregate principal amount of $20,896,462 in substantially the form of Exhibit A
hereto. Such Notes were issued to the Orion Subsidiaries against surrender to
the Company of the 9 1/2% Notes issued in 1991. As used in this Agreement, the
term "Notes" shall include all securities issued in exchange or replacement for
any such Note.

         0.2 ISSUANCE OF NOTES. Issuance of the Notes hereunder shall take place
on or about August 1, 1993 at which time each Orion Subsidiary will surrender to
the Company the 9 1/2% Note previously issued to such Orion Subsidiary, the
Company will pay to each Orion Subsidiary the amount of interest due on such
Note to the date of surrender, and the Company will deliver to each Orion
<PAGE>   2
Subsidiary a new Note in the principal amount set forth opposite the name of
such Orion Subsidiary on Schedule I hereto.

                                   ARTICLE II

                   TRANSFERS; EXCHANGES; PERSONS DEEMED OWNERS

         2.1 AUTHORIZED DENOMINATIONS. Until all or a portion of the Notes have
been registered in accordance with Article V hereof, the Notes are issuable in
denominations of at least $100,000 (or, if the unpaid principal amount of the
Notes owned or to be owned by any holder of a Note is less than $100,000, in the
denomination of such unpaid principal amount). Initially, such Notes shall be
issuable in the form of order notes payable to a person or order (an "Order
Note"). On and after the date upon which all or a portion of the Notes have been
registered in accordance with Article V hereof, any portion of the Notes that
shall be so registered shall be issuable only as fully registered notes (a
"Registered Note") in denominations of $1,000 and integral multiples thereof.

         2.2 THE NOTE REGISTER; PERSONS DEEMED OWNERS. The Company shall
maintain at its principal office, currently in Englewood, Colorado, a register
for the Registered Notes, in which the Company shall record the name and address
of the person in whose name each Registered Note has been issued and the name
and address of each transferee and prior owner of each Registered Note.

         The Company may deem and treat the person in whose name a Note is so
registered as the holder and owner thereof for all purposes and shall not be
affected by any notice to the contrary, until due presentment of such Note for
registration of transfer as provided in this Article II. The Company may treat
the person to whom any Order Note is payable as the owner and holder of such
Note for the purpose of receiving payment of principal of, and premium, if any,
and interest on, such Note and for all other purposes whatsoever, whether or not
such Note shall be overdue, until (a) the Company shall have received written
notice from the previous person treated as owner and holder of such Note of the
transfer of such Order Note, and of the name and address of the transferee, (b)
such Order Note shall have been presented to the Company for transfer or
exchange into the name of the new holder, and the Company shall have received
notice either from the previous person treated as the owner and holder of such
Note or from such new holder of the address of such new holder, or (c) a
subsequent holder of such Order Note shall have presented such Order Note to the
Company for inspection at the office or agency of the Company maintained as
provided in this Section 2.2 and shall have delivered to the Company written
notice of the acquisition


                                       -2-
<PAGE>   3
by such holder of such Order Note and the address of such holder.

         2.3 ISSUANCE OF NEW NOTES UPON EXCHANGE OR TRANSFER. Upon surrender for
exchange or registration of transfer of any Note at the office of the Company
designated for notices in accordance with Section 10.6, the Company shall
execute and deliver, at its expense, one or more new Notes of any authorized
denominations requested by the holder of the surrendered Note, each dated the
date to which interest has been paid on the Notes so surrendered (or, if no
interest has been paid, the date of such surrendered Note), but in the same
aggregate unpaid principal amount as such surrendered Note, and payable to such
person or persons as shall be designated in writing by such holder. Each Order
Note surrendered for transfer shall be duly endorsed in favor of the transferee
and shall be accompanied by a notice stating the name and address of the
transferee. Each Registered Note surrendered for registration of transfer shall
be duly endorsed, or be accompanied by a written instrument of transfer in form
satisfactory to the Company duly executed by the holder of such Note or by his
attorney duly authorized in writing. The Company may condition its issuance of
any new Registered Note or Notes (i) in connection with a transfer by any person
other than a wholly-owned subsidiary of Orion on the payment to it of a sum
sufficient to cover any stamp tax or other governmental charge imposed in
respect to such transfer and (ii) in connection with a transfer by any person to
the receipt by it of an opinion of independent counsel of recognized standing to
the effect that the proposed transfer would not be in violation of the
Securities Act of 1933, as amended (the "Securities Act").

         2.4 LOST, STOLEN, DAMAGED AND DESTROYED NOTES. At the request of the
holder of any Note, the Company will issue at its expense, in replacement of any
Note or Notes lost, stolen, damaged or destroyed, upon surrender of the
mutilated portions thereof, if any, a new Note or Notes of the same
denominations, of the same unpaid principal amounts and otherwise of the same
tenor as, the Note or Notes so lost, stolen, damaged or destroyed. The Company
may condition the replacement of a Note reported by the holder of a Note as
lost, stolen, damaged or destroyed, upon the receipt from such holder of an
indemnity or security reasonably satisfactory to the Company, provided that if
the holder of such Note shall be a wholly-owned subsidiary of Orion or a
nominee of such subsidiary, or an institutional investor having capital and
surplus in excess of $50,000,000 or its nominee then the indemnity of such
subsidiary, nominee or such institutional investor shall be sufficient for
purposes of this Section 2.4.



                                       -3-
<PAGE>   4
                                   ARTICLE III

                              PAYMENT OF THE NOTES

         3.1 REGULAR METHOD OF PAYMENT. Except as provided in Section 3.2, the
principal of, and interest on, each Note shall be payable at the principal
office of the Company, currently located at 9800 South Meridian Boulevard,
Englewood, Colorado 80112, in lawful money of the United States of America,
against presentment of such Note for notation of payment or, in the case of a
payment in full of such Note, against surrender thereof.

         3.2 HOME OFFICE PAYMENT. So long as any of the Orion Subsidiaries shall
own any of the Notes, the Company will pay all sums becoming due on each Note to
the order of any such Orion Subsidiary or its nominee at the address specified
for such purpose in Schedule I hereto by wire transfer of immediately available
funds, or at such other address in the continental United States as Orion or any
such Orion Subsidiary shall have designated by notice to the Company at least
five business days prior to the payment, in each case without presentment and
without notations being made thereon, except that any such Note so paid or
prepaid in full shall be surrendered to the Company for cancellation within
three business days following such payment. With respect to any such payment by
wire transfer, the Company will instruct its bank or other agent transmitting
the funds to transmit the funds by 11:00 a.m., New York time, on the date the
payment is due. Before transferring any such Note, Orion or one of the Orion
Subsidiaries will make a notation thereon of the aggregate amount of all
payments of principal theretofore made, and of the date to which interest has
been paid. If the transferee of any Note is a wholly owned subsidiary of Orion
or an institutional investor having assets in excess of $100,000,000 or its
nominee, and such transferee shall request the Company to make all payments on
account of such Note either by check or by wire transfer of immediately
available funds at an address in the continental United States, the Company will
make such payments in compliance with such request, provided that such
transferee undertakes in said request the same obligations in respect of such
Note as those undertaken by the Orion Subsidiary in the immediately preceding
sentence.

         3.3 INTEREST PAYMENT DATES AND RATE. The Company shall pay interest on
the unpaid principal amount of the Notes quarterly on January 1, April 1, July 1
and October 1 of each year commencing October 1, 1993 and thereafter until the
Notes have been paid in full. The rate of interest per annum to be paid on the
Notes shall be 7.85%. Whenever any payment of principal or interest to be made
on a Note shall be stated to be due on a day which is not a business day such
payment shall be made on the next succeeding business day and such extension
shall be

                                       -4-
<PAGE>   5
included in computing interest in connection with such payment. The computation
of the amount of accrued interest payable on each interest payment date and the
amount of interest due on overdue principal and any overdue installment of
interest (to the extent permitted by law) shall be determined in the manner set
forth in the form of Note attached as Exhibit A hereto.

         3.4 LIMITATION ON INTEREST. No provision of this Agreement or of any
Note shall require the payment or permit the collection of interest in excess of
the maximum rate permitted by law. If any such excess interest is provided for
herein or in any Note, or shall be adjudicated to be so provided for, then the
Company shall not be obligated to pay such interest in excess of the maximum
permitted by law, and the right to demand payment of any such excess interest is
hereby waived, any other provisions in this Agreement or in any Note to the
contrary notwithstanding.

         3.5 PREPAYMENTS WITHOUT PREMIUM.

                  (A) Mandatory prepayments. The Company covenants and agrees
that on January 1, 1998 and on the first day of each Julyand January thereafter
to and including July 1, 2003, the Company will prepay $1,741,372 or 8.33% of
the original aggregate principal amount of Notes (or if a lesser principal
amount remains unpaid, the entire principal amount thereof).

                  (B) Additional prepayments. On January 1, 1998 and on the
first day of each Julyand January thereafter, the Company may also prepay a
principal amount of the Notes equal to the principal amount then required to be
prepaid pursuant to subsection (A) of this Section 3.5 or a lesser principal
amount not less than an aggregate principal amount of $500,000. The right of
prepayment contained in this subsection (B) shall be noncumulative. The exercise
of the right to prepay pursuant to this subsection (B) shall not relieve the
Company to any extent from its obligation thereafter to make the prepayments
required by subsection (A) of this Section 3.5.

                  (C) Accrued interest. All Notes or portions thereof prepaid
pursuant to subsection (A) or (B) above shall be prepaid at their principal
amount, plus accrued interest thereon to the date fixed for prepayment, but
without premium.

         3.6 OPTIONAL PREPAYMENTS AT PREMIUM. In addition to the prepayments
provided for in Section 3.5 above, the Company may, at its option, prepay the
Notes at any time or from time to time on or after January 1, 1998, either in
whole or in part in a principal amount of not less than $500,000, at the
principal amount so to be prepaid, plus accrued interest thereon to the date
fixed for such


                                       -5-
<PAGE>   6
prepayment, and plus a premium equal to the applicable percentage of the
principal amount so being prepaid, determined as follows:

<TABLE>
<CAPTION>
   If prepaid during the 12-month
         period beginning                          Applicable percentage
   ------------------------------                  ---------------------
<S>                                                <C>
         January 1, 1998                                  103.925%
         January 1, 1999                                  102.617%
         January 1, 2000                                  101.308%
</TABLE>

and, if prepaid on or after January 1, 2001, without premium; provided, however,
that the Company shall not be entitled to make any such prepayment if such
prepayment is made, directly or indirectly, as a part of, or in anticipation of,
any refunding operation involving the incurring of indebtedness by the Company
or any subsidiary of the Company having an interest rate or effective interest
cost to the Company or such subsidiary (computed in accordance with generally
accepted financial practice) of less than 7.85% per annum and to the further
condition that notice of any such prepayment shall be accompanied by a
certificate, executed as of a recent date by the President and Chief Executive
Officer of the Company, to the effect that such prepayment is being made in
compliance with the foregoing restriction with respect to refunding. The
exercise of the right to prepay in part pursuant to this Section 3.6 shall not
relieve the Company to any extent from its obligation thereafter to make the
prepayments required by subsection (A) of Section 3.5 above.

         3.7 PARTIAL PREPAYMENTS TO BE PRO RATA. In the event of any prepayment
of less than all of the outstanding Notes, at a time when more than one Note is
outstanding, the principal amount of the Notes so to be prepaid shall be
allocated among the respective Notes and holders thereof so that the principal
amount to be prepaid to each holder pursuant to any Section of this Agreement
shall bear the same ratio to the aggregate principal amount then to be prepaid
pursuant to such Section as the principal amount of Notes then held by such
holder bears to the aggregate principal amount of Notes then outstanding.

         3.8 NOTICE OF PREPAYMENT. If, in addition to the mandatory prepayments
required to be made pursuant to subsection (A) of Section 3.5, the Company
should elect to prepay the Notes or any portion thereof pursuant to Section 3.5
(B) or Section 3.6, the Company shall give notice of such prepayment in writing
not less than 30 nor more than 60 days prior to the date fixed for such
prepayment, specifying 
(i) the prepayment date, (ii) the amount to be prepaid on each Note, (iii) the
accrued and unpaid interest (as of the date upon which the prepayment is to be
made) applicable to


                                       -6-
<PAGE>   7
the principal of each Note to be prepaid, and (iv) the particular provision
under which such additional or optional prepayment is being made. Notice of
prepayment having been so given, the aggregate principal amount of the Notes so
specified in such notice, together with all accrued and unpaid interest thereon,
shall become due and payable on the specified prepayment date.

                                   ARTICLE IV

                              AFFIRMATIVE COVENANTS

         The Company covenants and agrees that from the date hereof until the
Notes have been paid in full in accordance with the terms thereof:

         4.1 PRESERVATION OF FRANCHISES AND EXISTENCE. Except as otherwise
permitted by this Agreement, the Company will (i) maintain its corporate
existence, rights and franchises in full force and effect, and (ii) cause its
insurance subsidiaries to maintain their respective corporate existences, rights
and franchises in full force and effect, provided that nothing in this Section
4.1 shall prevent the Company from discontinuing (or causing its subsidiaries to
discontinue) its respective operations in any particular location or locations
within any state if such discontinuance or termination is in the best interest
of the Company or its subsidiaries, as the case may be, and is not
disadvantageous in any material respect to the holders of the Notes or in
violation of any provision of this Agreement.

         4.2 FINANCIAL STATEMENTS. The Company will deliver to Orion and the
Orion Subsidiaries, so long as Orion or any such Orion Subsidiary shall hold any
Note, and, upon request, to each other holder of any Note:

              (A) Annual Statements. As soon as reasonably possible, and in any
event within 120 days after the close of each fiscal year of the Company, copies
of (i) the consolidated balance sheet of the Company and its subsidiaries as of
the end of such fiscal year, (ii) consolidated statement of earnings of the
Company and its subsidiaries for such fiscal year, (iii) consolidated statement
of changes in stockholders' equity of the Company and its subsidiaries for such
fiscal year, (iv) consolidated statement of cash flows of the Company and its
subsidiaries for such fiscal year, setting forth in each case in comparative
form the corresponding figures of the previous year's financial statements, and
(v) with respect to Guaranty National Insurance Company ("GNIC") and its
subsidiary, Landmark American Insurance Company ("Landmark"), the Annual
Statements filed with their respective State Insurance Departments, together
with


                                       -7-
<PAGE>   8
consolidated reconciliations of statutory surplus and statutory net income, all
in reasonable detail, prepared in accordance with generally accepted accounting
principles, and, with the exception of the statements required in clause (v)
above, certified to by independent public accountants of recognized national
standing.

                 (B) Quarterly Statements. As soon as reasonably possible, and
in any event within 60 days after the close of each of the first three quarters
of each fiscal year of the Company, copies of (i) the consolidated balance sheet
of the Company and its subsidiaries as of the end of such quarter, (ii)
consolidated statement of earnings of the Company and its subsidiaries for such
quarter, (iii) consolidated statement of changes in stockholders' equity of the
Company and its subsidiaries for such quarter, (iv) consolidated statement of
cash flows of the Company and its subsidiaries for such quarter, as set forth in
the Company's Quarterly Report on Form 10-Q, setting forth in each case in
comparative form the corresponding periods of the preceding fiscal year, all in
reasonable detail, prepared in accordance with generally accepted accounting
principles.

                 (C) Other Information. Such other information relating to the
business, operations or condition, financial or otherwise, of the Company as may
be reasonably requested.

         4.3 INSPECTION OF PROPERTIES AND RECORDS. The Company agrees that, so
long as Orion or any of its wholly owned subsidiaries or any institutional
holder shall hold any Note, Orion or such institutional investor may visit at
its own expense the offices and properties of the Company and may examine and
make copies of the relevant books and records and discuss the affairs, finances
and accounts of the Company with its officers and public accountants (and by
this provision the Company hereby authorizes said accountants to discuss with
Orion or such institutional holder its affairs, finances and accounts) at such
reasonable times and as often as it or they may reasonably desire.

         4.4 COMPLIANCE WITH EXCHANGE ACT. The Company will file in a timely
manner all reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and such reports will
comply in all material respects with the requirements of the Exchange Act.

         4.5 SEC AND STOCK EXCHANGE FILINGS. Promptly upon their becoming
available, the Company will deliver to Orion, so long as it or any of its wholly
owned subsidiaries shall hold any Note, and, upon request, to each other holder
of any Note a copy of (i) all regular or periodic reports which the Company
shall file with the


                                       -8-
<PAGE>   9
Securities and Exchange Commission (the "Commission") or any national securities
exchange, and (ii) all reports, proxy statements and financial statements
delivered or sent by the Company to its respective stockholders.

                                    ARTICLE V

                               REGISTRATION RIGHTS

         5.1 REGISTRATION RIGHTS. The Company hereby covenants and agrees that
at any time upon the written request of the holders of $10,000,000 in aggregate
principal amount of the Notes, it shall prepare and file with the Commission a
registration statement under the Securities Act on the applicable form, covering
the Notes held by such requesting holders (a "Registration Statement"). The
Company shall use its best efforts to cause such Registration Statement to
become effective; provided, however, that the Company shall not be required to
effect such registration if in the written opinion of securities counsel to the
Company (which opinion is reasonably acceptable to the holders of the Notes),
the Notes requested to be registered may, as of the date of such opinion, be
publicly offered, sold and distributed without registration under the applicable
federal securities laws; and provided further that Orion and the holders of the
Notes are permitted to rely on such opinion. The Company shall be obligated to
prepare, file and cause to become effective only one Registration Statement
pursuant hereto. Without the written consent of the holders of at least 50% in
aggregate principal amount of Notes then outstanding, neither the Company nor
any holder of securities of the Company may include securities in such
registration; provided, however, that if a registration pursuant hereto is to
involve a fully underwritten public offering of such Notes, the Company may
include securities in such registration if, but only if, the managing
underwriter of such public offering concludes, in the exercise of its good faith
judgment, that such inclusion will not adversely affect the successful marketing
or reduce the expected selling price of the Notes in such public offering. The
Company agrees that the managing underwriter of the Notes shall be a firm of
national reputation selected by Orion with the consent of the Company, which
consent shall not be unreasonably withheld.

         5.2 AMENDMENTS TO AGREEMENT. The Company further covenants and agrees
that, among other things, it will agree to such changes in the terms of this
Agreement as may be appropriate to a public offering of the Notes and, if
necessary, to allow the preparation, filing and qualification under the Trust
Indenture Act of 1939 of an indenture relating to the Notes.

         5.3 REGISTRATION PROCEDURES AND RELATED MATTERS. If and whenever the
Company is required to effect the



                                       -9-
<PAGE>   10
registration of Notes described above, the registration procedures and related
matters set forth in that certain Shareholder Agreement dated November 7, 1991
(the "Shareholder Agreement") by and among Orion, certain wholly-owned
subsidiaries of Orion and the Company shall apply to the registration of the
Notes. The provisions of the Shareholder Agreement relating to such registration
procedures and related matters are reproduced in Exhibit B to this Agreement and
are incorporated herein by reference.

                                   ARTICLE VI

                                NEGATIVE COVENANT

         The Company covenants and agrees that, so long as any of the Notes
shall be outstanding:

         6.1 SALE, LEASE, MERGER OR CONSOLIDATION BY COMPANY. The Company will
not sell, lease, transfer or otherwise dispose of all or substantially all of
its properties and assets, or consolidate with or merge into any person or
permit any person to merge into it, except that the Company may sell, lease,
transfer or otherwise dispose of all or substantially all of its properties and
assets to, or consolidate with or merge into, any other corporation, or permit
another corporation to merge into it; provided that:

                (A) the obligations of the Company under this Agreement and the
Notes shall be expressly assumed by such successor corporation (if such
successor corporation shall not be the Company), transferee or lessee;

                (B) such successor corporation, transferee or lessee shall be a
corporation incorporated within the United States of America;

                (C) immediately prior thereto, the Company shall not be, and
immediately thereafter and after having given effect thereto, such successor
corporation (whether or not the Company is the successor) would not then be in
default in the performance or observance of any covenant, agreement or condition
of this Agreement, the Notes or any other loan agreement, indenture or other
document evidencing or securing indebtedness.

                                   ARTICLE VII

                         EVENTS OF DEFAULT AND REMEDIES

         7.1  EVENTS OF DEFAULT.  Each of the following shall
constitute an Event of Default under this Agreement:

                (A) Nonpayment of the Notes. If the Company fails to pay (i) the
principal of any Note, when and as the


                                      -10-
<PAGE>   11
same becomes due and payable, whether at the maturity thereof, on a date fixed
for prepayment, or otherwise, or (ii) the interest on any Note when and as the
same becomes due and payable; or

                (B)  Negative Covenant.  If the Company fails to
perform or observe any covenant applicable to it contained
in Article VI; or

                (C) Other Covenants. If the Company fails to perform or observe
any other material covenant, condition or agreement set forth in this Agreement
or in any Note and such failure continues unremedied for a period of fifteen
(15) days after written notice of such default to the Company by a holder of any
Note; or

                (D)  Bankruptcy; Insolvency.

                (i) If the Company, GNIC or Landmark shall

(1) admit in writing its inability to pay its debts generally as they become
due;

(2) file a petition in bankruptcy or a petition to take advantage of any
insolvency act;

(3) make an assignment for the benefit of its creditors;

(4) consent to the appointment of, or the taking of possession by, a receiver,
liquidator, trustee, custodian or similar official of itself or of the whole or
any substantial part of its property; or

(5) file a petition or answer seeking reorganization, arrangement or winding-up
under the Federal bankruptcy laws or any other applicable law or statute of the
United States of America or any State thereof or any other country or
jurisdiction, or consent to the entry against itself of, or obtain for itself,
an order for relief under any bankruptcy, insolvency or similar law.

               (ii) If a court of competent jurisdiction shall enter an order,
        judgment or decree appointing, without the consent of the Company, a
        receiver, liquidator, trustee, custodian or similar official for the
        Company, or of the whole or any substantial part of its properties, or
        shall enter an order for relief against the Company in an involuntary
        proceeding under any bankruptcy, insolvency or similar law, or shall
        enter an order, judgment or decree approving a petition filed against
        the Company seeking reorganization, arrangement or winding-up of the
        Company or adjudicating the Company a bankrupt under the Federal
        bankruptcy laws or any other


                                      -11-
<PAGE>   12
        similar law or statute of the United States of America or any State
        thereof or any other country or jurisdiction, and such order, judgment
        or decree shall not be vacated or set aside or stayed within 60 days
        from the date of the entry thereof.

               (iii) If, under the provisions of any other law for the relief or
        aid of debtors, any court of competent jurisdiction shall assume custody
        or control of the Company or of the whole or any substantial part of its
        properties and such custody or control shall not be terminated or stayed
        within 60 days from the date of assumption of such custody or control;
        or

                (E) Default on Other Indebtedness. If the Company fails to pay
any part of the principal of, the premium, if any, or interest on, or any other
payment of money due under, any of its indebtedness for borrowed money (the
amount of which indebtedness equals or exceeds $1,500,000), whether such
indebtedness now exists or shall hereafter be created (other than the Notes), or
fails to perform or observe any other agreement, term or condition contained in
any document evidencing or securing such indebtedness, or in any agreement under
which any such indebtedness was issued or created, in each case, if such failure
shall result in any payment on such indebtedness becoming or being declared due
and payable prior to the date on which it would otherwise become due and
payable, and such acceleration shall not be rescinded or annulled, or such
indebtedness shall not have been discharged within forty-five (45) days of the
date of such acceleration;

then, at any time thereafter during the continuance of such Event of Default,
the holder of a Note may declare the Note to be immediately due and payable,
both as to principal and interest.

        7.2 ACCELERATION OF MATURITY. If any Event of Default shall be
continuing, the holder(s) of not less than 251 in aggregate principal amount of
the Note then outstanding may, by notice to the Company, declare the entire
outstanding principal of all the Notes, and all accrued unpaid interest thereon,
to be due and payable immediately, and upon any such declaration the entire
outstanding principal of the Notes and said accrued unpaid interest shall become
and be immediately due and payable, without presentment, demand, protest or
other notice whatsoever, all of which are hereby expressly waived, anything in
the Notes or in this Agreement to the contrary notwithstanding.

        7.3 OTHER REMEDIES. If any Event of Default shall be continuing, the
holder of any Note may enforce its rights by suit in equity, by action at law,
or by any other appropriate proceedings, whether for the specific performance
(to the extent permitted by law) of any covenant or agreement contained in this
Agreement or in the Notes or in aid of the exercise of any power granted in this
Agreement, and may


                                      -12-
<PAGE>   13
enforce the payment of any Note held by such holder and any of its other legal
or equitable rights.

        7.4 CONDUCT NO WAIVER; COLLECTION EXPENSES. No course of dealing on the
part of the holder of any Note, nor any delay or failure on the part of any
holder to exercise any of its rights, shall operate as a waiver of such right or
otherwise prejudice such holder's rights, powers and remedies. If the Company
fails to pay, when due, the principal of, or the interest on, any Note, or fails
to comply with any other provision of this Agreement, the Company will pay to
the holders of the Notes, to the extent permitted by law, on demand, such
further amounts as shall be sufficient to cover the costs and expenses,
including but not limited to reasonable attorneys' fees, incurred by such
holders of the Notes, in collecting any sums due on the Notes or in otherwise
enforcing any of their rights.

        7.5 ANNULMENT OF ACCELERATION. If a declaration is made in accordance
with Section 7.2 of this Agreement, then the holders of not less than 66 2/3% in
aggregate principal amount of the Notes then outstanding may, by an instrument
delivered to the Company, annul such declaration and the consequences thereof,
provided that at the time such declaration is annulled:

                (A) no judgment or decree has been entered for the payment of
any monies due on the Notes or pursuant to this Agreement;

                (B) all arrears of interest on the Notes and all other sums
payable on the Notes and pursuant to this Agreement (except any principal of or
interest on the Notes which has become due and payable by reason of such
declaration) shall have been duly paid; and

                (C) every other Event of Default shall have been duly waived or
otherwise made good or cured; and provided further that no such annulment shall
extend to or affect any subsequent Event of Default or impair any right
consequent thereon.

         7.6 REMEDIES CUMULATIVE. No right or remedy conferred upon or reserved
to Orion, any of the Orion Subsidiaries or the holder of any Note under this
Agreement is intended to be exclusive of any other right or remedy, and every
right and remedy shall be cumulative and in addition to every other right or
remedy given hereunder or now or hereafter existing under any applicable law.
Every right and remedy given by this Agreement or by applicable law to Orion,
any of the Orion Subsidiaries or the holder of any Note may be exercised from
time to time and as often as may be deemed expedient by Orion, any of the Orion
Subsidiaries or such holder, as the case may be.


                                      -13-
<PAGE>   14
                                  ARTICLE VIII

                                  SUBORDINATION

         The Company covenants and agrees and the holder of any Note, by
acceptance thereof, covenants and agrees, expressly for the benefit of the
present and future holders of Senior Debt (as defined below), that payment of
the principal and interest on the Notes is expressly subordinated in right of
payment to the payment in full of the principal of and interest on Senior Debt
of the Company in each circumstance described below in accordance with the
provisions of this Agreement and the Notes. Upon any liquidation of assets of
the Company or upon the occurrence of any dissolution, winding up or
liquidation, whether or not in bankruptcy, insolvency or receivership
proceedings, the Company shall not pay thereafter, and the holder of any Note
shall not be entitled to receive thereafter, any amount in respect of the
principal of and interest on the Note unless and until all Senior Debt shall
have been paid or otherwise discharged. Upon dissolution, winding up or
liquidation, any payment or distribution of assets of the Company, whether in
cash, property or securities to which the holder of any Note would be entitled
except for the provisions hereof, shall be paid by the liquidating trustee or
agent or other person making such payment or distribution, whether a trustee in
bankruptcy, a receiver or liquidating trustee or otherwise, directly to the
holders of Senior Debt, or their representative or representatives ratably
according to the aggregate amounts remaining unpaid on Senior Debt held or
represented by each, to the extent necessary to pay said Senior Debt in full
after giving effect to any concurrent payment or distribution to the holders of
such Senior Debt.

         As used in this Agreement and the Notes, the term "Senior Debt" shall
mean indebtedness of the Company, designated by the Company as Senior Debt
within the meaning hereof, not to exceed $140 million in aggregate principal
amount at any one time outstanding, regardless of whether incurred on, before or
after the date of this Agreement (i) for money borrowed from any bank or other
institutional lender and evidenced by notes, bonds, debentures or other written
obligations, provided that such notes, bonds, debentures or other written
obligations are interest bearing securities only and are not convertible into
capital stock or issued in connection with the issuance of warrants or options,
whether separate or attached, or some other rights to receive stock or
participate in the earnings of the Company in any form, including dividend
distributions, or (ii) which constitutes a renewal or extension of any
indebtedness described in (i) above; provided, however, that the term "Senior
Debt" shall not include indebtedness which by the terms of the instrument
creating or evidencing the same is subordinated to or on a parity with this
Note.


                                      -14-
<PAGE>   15
         It is understood that the provisions hereof entitled "Subordination"
are, and are intended to be, solely for the purpose of defining the relative
rights of the holders of the Notes on the one hand and the holders of Senior
Debt of the Company on the other hand. Nothing contained in this Section or
elsewhere in this Agreement or the Notes shall impair, as between the Company,
its creditors other than the holder of Senior Debt, and the holders of the
Notes, the unconditional and absolute obligation of the Company to pay the
holders of the Notes the principal of and interest on the Notes as and when the
same shall become due and payable in accordance with its terms or affect the
relative rights of the holders of the Notes and the creditors of the Company,
other than the holders of such Senior Debt; nor shall anything herein prevent
the holders of the Notes from exercising all remedies otherwise permitted by
applicable law upon default under the Notes, subject to the rights, if any, of
the holders of Senior Debt with respect to cash, property or securities of the
Company received upon the exercise of any such remedy. The subordination herein
provided applies to payments or distributions by the Company only and shall not
affect the right of the holder to collect and retain payment from any
co-obligor, guarantor or surety. Upon any payment or distribution of assets of
the Company referred to in this Section entitled "Subordination," the holders of
the Notes shall be entitled to rely upon any order or decree made by any court
of competent jurisdiction in which such dissolution, winding up, liquidation or
reorganization proceedings are pending, or upon a certificate of the liquidating
trustee or agent or other person making any distribution to the holders of the
Notes, for the purpose of ascertaining the persons entitled to participate in
such distribution, the holders of Senior Debt and other indebtedness of the
Company, the amounts thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Section.

                                   ARTICLE IX

                               CONVERSION OF NOTES

         9.1 BY THE COMPANY. The Company may, at any time prior to the maturity
of the Notes and upon ten days' written notice to the holders of the Notes,
convert all or any part of the outstanding Notes into Common Stock, par value
$1.00 of the Company ("Common Stock") at a conversion price per share equal to
the net price per share received by the Company (the "Offering Price") from the
offering of up to 1,450,000 shares of its Common Stock being sold by the Company
to Fox-Pitt, Kelton, N.V. pursuant to Regulation S under the Securities Act of
1933, as amended (the "Offering"). Not later than ten days following completion
of the Offering and receipt by the Company of the net proceeds of the Offering,
the Company shall send a notice of conversion to each holder of Notes, offering
to sell to the holders, pro rata in accordance with the principal amount of



                                      -15-
<PAGE>   16
Notes held by each holder, at the Offering Price, not more than 550,000 shares
of Common Stock. Any holder which does not, by the tenth day after the date of
such notice of conversion, decline the Company's offer in writing shall be
deemed to have accepted it on such tenth day. Each holder of Notes shall be
entitled, pro rata, to purchase any offered shares of Common Stock not purchased
by any other holder; the Company shall send an additional notice of conversion
to each holder which accepts, or is deemed to have accepted, the Company's offer
whenever shares of Common Stock become available for purchase by reason of any
other holder declining to purchase its pro rata entitlement pursuant hereto and
such holder shall accept, or be deemed to have accepted such offer in the manner
set forth above. The purchase price for any Common Stock issued to any holder
pursuant hereto shall be paid by surrender to the Company, for cancellation, of
Notes in an amount equal to the aggregate purchase price of the Common Stock to
be purchased by such holder.

         9.2 BY THE COMPANY OR BY THE HOLDERS. Upon the occurrence of the
Stockholder Approval referred to in Section 9.3, the Company shall promptly
notify each holder of such Stockholder Approval. At any time thereafter and
prior to the maturity of the Notes:

         (i) The Company may, offer to sell to the holders, pro rata at the
Offering Price, a number of shares of Common Stock having an aggregate purchase
price equal to the aggregate principal amount of Notes then outstanding. Any
holder which does not, within ten days of the date of such notice of conversion,
decline the Company's offer in writing shall be deemed to have accepted it. Each
holder of Notes shall be entitled, pro rata, to purchase any offered shares of
Common Stock not purchased by any other holder; the Company shall send an
additional notice to each holder which accepts, or is deemed to have accepted,
the Company's offer each time shares of Common Stock become available for
purchase by reason of any other holder declining to purchase its pro rata
entitlement pursuant hereto and such holder shall accept, or be deemed to have
accepted such offer in the manner set forth above.

         (ii) Any holder may, upon ten days' written notice to the Company,
demand conversion of all (but not less than all) Notes owned by such holder and,
on the conversion date set forth in such notice, such holder's Notes shall be
deemed automatically to have been converted into Common Stock at a conversion
price per share equal to the Offering Price.


                                      -16-
<PAGE>   17
         9.3 STOCKHOLDER APPROVAL. The Company shall submit to its stockholders,
for approval by them (the "Stockholder Approval"), the issuance of shares of
Common Stock pursuant hereto, at the regular or special meeting of stockholders
of the Company next held after the date of this Agreement. In the proxy
statement mailed to stockholders in connection with such meeting the Company
shall state that the Board of Directors of the Company has determined that the
issuance of Common Stock upon conversion of Notes pursuant to this Amended and
Restated Note Issuance Agreement, is in the judgment of the Board of Directors
in the best interests of the Company.

         9.4 PREPAYMENTS PURSUANT TO ARTICLE III. In the event that the Company
is required or elects to make any prepayment pursuant to Section 3.5 or Section
3.6, it may send to each holder of Notes, not less than ten days prior to the
making of such prepayment, an election to deliver to such holder, a number of
shares of Common Stock whose price, calculated at the Offering Price is equal to
the principal amount of the Notes of such holder to be prepaid. Delivery of the
shares so offered shall discharge the Company's payment obligations in respect
of the principal amount so to be prepaid.

         9.5 ACCRUED INTEREST ON CONVERTED NOTES. Upon the surrender of any
Notes for conversion, the Company shall pay all accrued interest on such Notes
from the date to which interest was last paid to and including the effective
date of conversion.

         9.6 LISTING OF COMMON STOCK; MAXIMUM NUMBER OF SHARES TO BE ISSUED. In
the event of any conversion of Notes pursuant to this Article IX, the Company
shall cause all shares issued upon conversion to be duly listed for trading on
the New York Stock Exchange. Shares of Common Stock delivered to a holder upon
conversion shall be accompanied by an opinion of legal counsel for the Company
to the effect that such shares have been duly authorized and issued, are fully
paid and non-assessable and have been effectively listed for trading on the New
York Stock Exchange. Notwithstanding the provisions of this Article IX, the
Company may not offer to convert Notes and a holder may not tender Notes for
conversion to the extent that, after giving effect to such conversion, the
aggregate number of shares of Common Stock owned by Orion and its subsidiaries
would exceed 49.9% of the total number of shares of Common Stock outstanding.

         9.7 ANTI-DILUTION. In the event of any recapitalization,
reclassification or recombination of the shares of Common Stock of the Company
into a greater or lesser number of shares or into shares of an issuer other than
the Company, then the securities issuable upon conversion of Notes, and the
amount of securities to be issued, shall be adjusted in such fashion as the
Board of


                                      -17-
<PAGE>   18
Directors of the Company determines to be appropriate equitably to recognize the
rights granted to holders of Notes pursuant to this Article IX. In the event
that the Company at any time issues or sells Common Stock (other than pursuant
to an employee benefit plan of the Company) at a price less than the fair market
value at the time of such issuance or sale, then the conversion price shall be
adjusted in such fashion as the Board of Directors of the Company determines to
be appropriate equitably to recognize the rights granted to holders of Notes
pursuant to this Article IX.

                                    ARTICLE X

                                  MISCELLANEOUS

         10.1 AMENDMENTS. This Agreement may be amended, and any of its
restrictions or provisions may be waived with the consent of the holders of 66
2/3% of the principal amount of the Notes then outstanding, except that without
the consent of the holders of all the Notes then outstanding, no amendment to or
waiver under this Agreement shall extend the maturity of any Note, or reduce the
rate of interest payable with respect to any Note, or amend Section 7.1 or 7.2
or 7.5, or reduce the proportion of the principal amount of the Notes required
with respect to any waiver, consent or amendment.

         10.2 BUSINESS DAY. A "business day" shall mean any day other than a
Saturday, Sunday or legal holiday in the State of New York.

         10.3 INTEGRATION AND SEVERABILITY. This Agreement and the Notes embody
the entire agreement and understanding by and among the parties hereto with
respect to the subject matter hereof and supersede all prior agreements and
understandings with respect thereto. In case any one or more of the provisions
contained in this Agreement or in any Note, or any application thereof, shall be
invalid, illegal or unenforceable in any respect, the validity, legality and
enforceability of the remaining provisions contained herein and therein, and any
other application thereof, shall not in any way be affected or impaired thereby.

         10.4 SUCCESSORS AND ASSIGNS. All covenants and agreements in this
Agreement and the Notes or any certificate delivered pursuant hereto by or on
behalf of the Company or by or on behalf of Orion or the Orion Subsidiaries
shall bind and inure to the benefit of the respective successors and assigns of
such party hereto or thereto, except where the context otherwise requires.

         The Company may not assign its rights under this Agreement without the
written consent of the holders of the Notes.


                                      -18-
<PAGE>   19
         10.5 RELIANCE ON AND SURVIVAL OF VARIOUS PROVISIONS. All covenants and
agreements made herein or in the Notes or in any certificate delivered pursuant
hereto shall survive the execution and delivery of the Notes and shall continue
in full force and effect so long as any Note is outstanding and unpaid.

         10.6 NOTICES AND OTHER COMMUNICATIONS. All notices, requests, consents
and other communications provided for under this Agreement or the Notes shall be
in writing and shall be delivered, or shall be sent by certified or registered
mail, postage prepaid and addressed, (i) if to Orion, to Orion Capital
Corporation, 600 Fifth Avenue, 24th Floor, New York, New York 10020-2302
Attention: Treasurer, or to such other address as may have been furnished to the
Company by notice from Orion, or (ii) if to any Orion Subsidiary, to its address
set forth in Schedule I, or to such other address as may have been furnished to
the Company by notice from such Noteholder, (iii) if to the Company, to Guaranty
National Corporation, 9800 South Meridian Boulevard, P.O. Box 3329 (80155),
Englewood, Colorado 80112, Attention: Treasurer, or to such other address as may
have been furnished to Orion and any other holder of a Note, by notice from the
Company. All notices shall be deemed to have been given either at the time of
the delivery thereof to any officer or employee of the person entitled to
receive such notice at the address of such person for purposes of this Section
10.6, or, if mailed, at the completion of the fifth full day following the time
of such mailing thereof to such address, as the case may be.

         10.7 GOVERNING LAW. This Agreement and the Notes shall be construed in
accordance with and governed by the laws of the State of New York.

         10.8 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, and all of which, taken
together shall constitute one and the same instrument.

         If the foregoing is acceptable to you, please sign this Agreement on
the space indicated whereupon this Agreement shall become binding by and among
Orion, the Orion Subsidiaries and the Company.

                                        Very truly yours,

                                        GUARANTY NATIONAL CORPORATION

                                        By: _____________________________
                                            Name:   Roger B. Ware
                                            Title:  President and Chief
                                                    Executive Officer


                                      -19-
<PAGE>   20
                                 ORION CAPITAL CORPORATION
                                 
                                 By:  __________________________
                                      Name:  Alan R. Gruber
                                      Title: Chairman & Chief
                                        Executive Officer
                                 
                                 THE CONNECTICUT INDEMNITY COMPANY
                                 
                                 CONNECTICUT SPECIALTY INSURANCE
                                    COMPANY
                                 
                                 DESIGN PROFESSIONALS INSURANCE
                                    COMPANY
                                 
                                 EMPLOYEE BENEFITS INSURANCE
                                    COMPANY
                                 
                                 EBI INDEMNITY COMPANY
                                 
                                 THE FIRE AND CASUALTY INSURANCE
                                    COMPANY OF CONNECTICUT
                                 
                                 SECURITY INSURANCE COMPANY OF
                                    HARTFORD
                                 
                                 SECURITY REINSURANCE COMPANY
                                 
                                 By: __________________________
                                     Name:  Alan R. Gruber
                                     Title: Chairman
                                 
                                 SECURITY RE, INC.
                                 
                                         By: __________________________
                                 
                                     Name:   Vincent T. Papa
                                     Title:  Senior Vice President
                                               & Treasurer



                                      -20-
<PAGE>   21
                                   SCHEDULE I
                                       to
                             NOTE ISSUANCE AGREEMENT
                          dated as of November 7, 1991

<TABLE>
<CAPTION>
                                                               Principal
  Orion Subsidiaries                                         Amount of Note
  ------------------                                         --------------
<S>                                                          <C>         
The Connecticut Indemnity Company                            $  1,173,333

Connecticut Specialty Insurance Company                           160,000

Design Professionals Insurance Company                          2,266,667

Employee Benefits Insurance Company                             6,419,200

EBI Indemnity Company                                             741,333

The Fire & Casualty Insurance Company

of Connecticut                                                    432,000

Security Insurance Company of Hartford                          6,604,929

Security Re, Inc.                                               1,067,000

Security Reinsurance Company                                    2,032,000
                                                             ------------
  AGGREGATE PRINCIPAL AMOUNT                                 $ 20,896,462
    OF NOTES TO BE ISSUED                                    ============
</TABLE>

Address for Payments and Notices:

For each of the Orion Subsidiaries, the address to which payments are to be made
and notices are to be sent is as follows:

                    Orion Capital Companies, Inc.
                    9 Farm Springs Drive
                    Farmington, CT 06032
                    Attention:  Mr. Craig Nyman,
                                Vice President &
                                Assistant Treasurer

Wire Transfer Instructions are set forth on page S-2.

All wires for each of the six companies listed below are:

Manufacturers Hanover Trust
NY, NY

                                      S-1-1
                                                      
<PAGE>   22
ABA #021000306
Ref: GNC Note

        The Connecticut Indemnity Co. A/C # AR76573-71
        Connecticut Specialty Ins.  Co. A/C # AR76580-75
        EBI Indemnity Co. A/C # AR76576-70
        The Fire & Casualty Ins.  Co. of CT A/C # AR76582-78
        Security Ins.  Co. of Hart A/C # AR76570-72
        Security Rein.  Co. A/C # AR76575-74

All wires for each of the two companies listed below are:

Security Pacific National Bank
LA, CA
ABA #122000043
Ref: GNC Note

        Design Professionals Ins.  Co. A/C # QE7503100
        Employee Benefits Ins.  Co. A/C # QE7503050

All wires for the company listed below are:

Fleet Bank N.A.
Hartford, CT
ABA #011900571
Ref: GNC Note

        Security Reinsurance Under.  Inc.  A/C  1120433

                                      S-2-2
                                                      
<PAGE>   23
                   THIS NOTE HAS NOT BEEN REGISTERED UNDER THE
                      SECURITIES ACT OF 1933 AND MAY NOT BE
                   SOLD OR OFFERED FOR SALE UNLESS REGISTERED
                   PURSUANT TO SUCH ACT OR UNLESS AN EXCEPTION
                      FROM SUCH REGISTRATION IS AVAILABLE.

                    THIS NOTE MAY BE SUBJECT TO A HOME OFFICE
                PAYMENT AGREEMENT AND ACCORDINGLY ANY PROSPECTIVE
                 PURCHASER HEREOF SHOULD FIRST VERIFY THE UNPAID
                    PRINCIPAL AMOUNT HEREOF WITH THE COMPANY

                          GUARANTY NATIONAL CORPORATION
                       7.85% Subordinated Promissory Note
                                Due July 1, 2003

Registration No.1                                               ____________ __,
199_

$___________


         FOR VALUE RECEIVED, the undersigned, GUARANTY NATIONAL CORPORATION (the
"Company"), a corporation organized and existing under the laws of Colorado,
hereby promises to pay to ______________ or _________2 the principal sum of
($_________), on July 1, 2003 together with interest (computed on the basis of a
360-day year of twelve 30-day months) on the unpaid principal sum hereof from
the date of this Note until said principal sum shall be fully paid and satisfied
at the rate of 7.85% per annum, quarterly in arrears on January 1, April 1, July
1 and October 1 in each year, commencing with the interest payment date next
succeeding the date hereof. The Company hereby promises to pay interest
(computed on the basis of a 360-day year of twelve 30-day months) on any overdue
principal and, so far as may be lawful, on any overdue installment of interest,
at a rate per annum equal to 8.85%.

________
1        If the Note to be issued is to be an Order Note, delete registration
         number.

2        If the Note to be issued is to be an Order Note, insert the word
         "Order"; if the Note to be issued is to be a Registered Note, insert
         the words "Registered Assigns."

                                      A-1-1
                                                        
<PAGE>   24
         Payments of the principal of, and interest on, this Note shall be made
in lawful money of the United States of America in the manner and at the place
provided in Article III of the Agreement hereinafter mentioned. Whenever any
payment of principal or interest to be made on a Note shall be stated to be due
on a day which is not a business day, such payment shall be made on the next
succeeding business day and such extension shall be included in computing
interest in connection with such payment.

         This Note is one of the Company's 7.85% Subordinated Promissory Notes
due July 1, 2003 limited in aggregate principal amount to $20,896,462 (the
"Notes"), issued pursuant to the Agreement hereinafter mentioned. This Note is
entitled to the benefits of and is subject to the terms contained in the Note
Issuance Agreement, dated as of November 7, 1991, as amended as of August 1,
1993 and June __, 1995 by and among the Company, Orion Capital Corporation and
certain subsidiaries of Orion Capital Corporation referred to therein. (Such
Note Issuance Agreement, as amended, as the same may be further amended and
modified from time to time, is referred to herein as the "Agreement.")

         The provisions of the Agreement are hereby incorporated into this Note
to the same extent as if set forth herein. Capitalized terms used in this Note,
unless otherwise defined herein, have the meanings attributed to them in the
Agreement.

         If an Order Note, the Company may treat the person to whom this Order
Note is payable as the owner and holder hereof for the purpose of receiving
payments of principal and interest until any of the events specified in Article
II of the Agreement shall occur. If a Registered Note, the Company may deem and
treat the person in whose name this Note is registered pursuant to Article II of
the Agreement as the holder and owner hereof for the purpose of receiving
payments and for all other purposes whatsoever, notwithstanding any notations of
ownership or transfer hereon and notwithstanding that this Note is overdue, and
the Company shall not be affected by any notice to the contrary until
presentation of this Note for registration of transfer as provided in Article II
of the Agreement.

         Mandatory prepayments of principal will commence on January 1, 1998,
and on the first day of each Julyand January there-after to and including July
1, 2003 in the amount of 8.33% of the original aggregate principal amount of the
Notes (or the then unpaid principal amount of the Notes, if less than such
amount).

                                      A-2-2
                                                        
<PAGE>   25

         This Note is subject to optional prepayment, in whole or in part, on or
after January 1, 1998 and may be subject to conversion into Common Stock of the
Company at the option of the Company or the holder hereof but subject, in
certain circumstances, to approval by the stockholders of the Company, all as
more fully provided in the Agreement.

         As described in the Agreement, the holders of the Notes are entitled to
certain rights to registration under the Securities Act of 1933 exercisable by
the holders of $10,000,000 in aggregate principal amount of the Notes.

         In case an Event of Default (as defined in the Agreement) shall happen
and be continuing, the principal of this Note may be declared due and payable in
the manner and with the effect provided in the Agreement.

         The indebtedness evidenced by this Note is subordinated to up to
$140,000,000 of Senior Debt to the extent and in the manner set forth in the
Agreement.

         The Company hereby irrevocably waives all rights of set-off against the
holder hereof with respect to its obligation to make all payments of principal
and interest required under this Note.

         Should the indebtedness represented by this Note or any part thereof be
collected in any proceeding provided for in the Agreement or be placed in the
hands of attorneys for collection, the Company agrees to pay, in addition to the
principal and interest due and payable herein, all costs of collecting this
Note, including reasonable attorneys fees and expenses.

         IN WITNESS WHEREOF, GUARANTY NATIONAL CORPORATION has caused this Note
to be executed on its behalf by its duly authorized officers.

                                       GUARANTY NATIONAL CORPORATION
                                       
                                       By __________________________
                                          Roger B. Ware, President
                                       
                                       By __________________________
                                          Beverly Silk, Secretary

                                      A-3-3

                          
<PAGE>   26
                                    EXHIBIT B
                                       to
                             NOTE ISSUANCE AGREEMENT

           Excerpt from Shareholder Agreement dated November 7, 1991 (the
"Shareholder Agreement") by and among Guaranty National Corporation
("Guaranty"), Orion Capital Corporation ("Orion") and certain of Orion's
wholly-owned subsidiaries (listed therein and referred to as the "Selling
Shareholders"). Terms used in the Shareholder Agreement and not otherwise
defined in the Note Issuance Agreement shall have the meanings ascribed to such
terms in the Shareholder Agreement. Such excerpt consists of Section 2.4
(Registration Procedures) through Section 2.8 (Standoff), as follows:

                    2.4 Registration Procedures. If and whenever Guaranty is
required by the provisions of Section 2.1, 2.2 or 2.3 to effect the registration
of shares of Sellers Stock or Guaranty Notes, Guaranty will:

                    (a) Prepare and file with the Commission a registration
statement on the appropriate form or forms with respect to such securities and
use its best efforts to cause such registration statement to become and remain
effective for at least 90 days thereafter, and prepare and file with the
Commission such amendments or supplements as may be necessary to keep such
registration statement effective for at least 90 days after the effective date
of the registration statement.

                    (b) Enter into a written underwriting agreement or
agreements in form and substance reasonably satisfactory to the managing
underwriter or underwriters of the public offering of such securities, if the
offering is to be underwritten in whole or in part.

                    (c) Furnish to the beneficial owners of the Sellers Stock or
the Guaranty Note Holders, as the case may be, such reasonable number of copies
of the registration statement, preliminary prospectus, final prospectus and such
other documents as may reasonably be requested in order to facilitate the public
offering of such securities.

                    (d) Use its best efforts to register or qualify the
securities covered by such registration statement under such state securities or
blue sky laws of such jurisdictions as the beneficial owners of the Sellers
Stock or the Guaranty Note Holders, as the case may be, may reasonably request,
except that Guaranty shall not for

                                      B-1-1
                                                 
<PAGE>   27
any purpose be required to execute a general consent to service of process or to
qualify to do business as a foreign corporation in any jurisdiction where it is
not so qualified.

                    (e) Notify the beneficial owners of the Sellers Stock or the
Guaranty Note Holders, as the case may be, promptly after it shall receive
notice thereof, of the time when such registration statement has become
effective or an amendment or a supplement to any registration or prospectus
forming a part of such registration statement has been filed.

                    (f) Notify the beneficial owners of the Sellers Stock or the
Guaranty Note Holders, as the case may be, promptly of any request by the
Commission for the amending or supplementing of such registration statement or
prospectus or for additional information.

                    (g) Prepare and file with the Commission promptly, upon the
request of the beneficial owners of the Sellers Stock or the Guaranty Note
Holders, as the case may be, any amendments or supplements to such registration
statement or prospectus which, in the opinion of counsel for the beneficial
owners of the Sellers Stock or the Guaranty Note Holders, as the case may be,
are required under the applicable federal securities laws or the rules and
regulations thereunder in connection with the distribution of the Sellers Stock
or Guaranty Notes.

                    (h) Prepare and promptly file with the Commission, and
promptly notify the beneficial owners of the Sellers Stock or the Guaranty Note
Holders, as the case may be, of the filing of, such amendment or supplement to
such registration statement or prospectus as may be necessary to correct any
statements in, or omissions from, such registration statement, if, at the time
when a prospectus relating to such securities is required to be delivered under
any applicable federal securities laws, any event has occurred as the result of
which any such prospectus or any other prospectus as then in effect would
include an untrue statement of a material fact or omit to state any material
fact necessary to make the statements therein not misleading in the light of the
circumstances in which they were made.

                    (i) In the event the beneficial owners of the Sellers Stock
or Guaranty Note Holders, as the case may be, or any underwriter for the
beneficial owners of the Sellers Stock, or the Guaranty Note Holders, as the
case may be, is required to deliver a prospectus at a time when the prospectus
then in effect may no longer be used under applicable federal securities laws,
prepare promptly upon

                                      B-2-2
                                                 
<PAGE>   28
request of the beneficial owners of the Sellers Stock or Guaranty Note Holders,
as the case may be, such amendments or supplements to such registration
statement and such prospectus as may be necessary to permit compliance with the
requirements of applicable federal securities laws.

                    (j) Advise the beneficial owners of the Sellers Stock or the
Guaranty Note Holders, as the case may be, promptly after it shall receive
notice or obtain knowledge thereof, of the issuance of any stop order by the
Commission suspending the effectiveness of such registration statement or the
initiation or threatening of any proceeding for that purpose and promptly use
its best efforts to prevent the issuance of any stop order or to obtain its
withdrawal if such stop order should be issued.

                    (k) Not file any amendment or supplement to such
registration statement or prospectus to which any of the beneficial owners of
the Sellers Stock or the Guaranty Note Holders, as the case may be, reasonably
objects on the ground that such amendment or supplement does not comply in all
material respects with the requirements of any applicable federal securities law
or the rules and regulations thereunder, after having been furnished with a copy
thereof at least five business days prior to the filing thereof.

                    (1) At the request of the beneficial owners of the Sellers
Stock or the Guaranty Note Holders, as the case may be, furnish on the effective
date of the registration statement and, if such registration involves an
underwritten public offering, at the closing provided for in the underwriting
agreement, (i) an opinion of the counsel representing Guaranty (such counsel
being reasonably satisfactory to the beneficial owners of the Sellers Stock or
Guaranty Note Holders, as the case may be), for the purposes of such
registration, addressed to the underwriters, if any, and to the beneficial
owners of the Sellers Stock or the Guaranty Note Holders, as the case may be,
covering such matters with respect to the registration statement, the prospectus
and each amendment or supplement thereto, proceedings under state and federal
securities laws, other matters relating to Guaranty, the securities being
registered and the offer and sale of such securities as are customarily the
subject of opinions of issuer's counsel provided to underwriters in underwritten
public offerings, and (ii) a letter dated each such date, from the independent
certified public accountants of Guaranty addressed to the underwriters, if any,
and to-the beneficial owners of the Sellers Stock or the Guaranty Note Holders,
as the case may be, stating that they are independent certified public
accountants within the meaning of the applicable federal securities laws and

                                      B-3-3
                                                 
<PAGE>   29
that, in the opinion of such accountants, the financial statements and other
financial data of Guaranty included in the registration statement or the
prospectus or any amendment or supplement thereto comply in all material
respects with the applicable accounting requirements of the applicable federal
securities laws, and additionally covering such other financial matters,
including information as to the period ending not more than five business days
prior to the date of such letter and with respect to the registration statement
and the prospectus, as the underwriters or the beneficial owners of the Sellers
Stock or the Guaranty Note Holders, as the case may be, may reasonably request.

                    (m) Refrain from making any sale or distribution of its
voting securities, except pursuant to any employee stock plan and any
pre-existing agreement for the sale of such securities, during the period
commencing seven days prior to, and expiring 120 days after, the registration
statement has become effective.

                    2.5  Expenses.

                    (a) With respect to the first two registrations to be
effected pursuant to Section 2.1 and the registration to be effected pursuant to
Section 2.2 hereof, all out-of pocket fees, costs and expenses of and Incidental
to such registration and public offering in connection therewith shall be borne
by Guaranty.

                    (b) With respect to any third registration to be effected
pursuant to Section 2.1 hereof or with respect to the inclusion of shares of
Sellers Stock in a registration statement pursuant to Section 2.3 hereof, all
the fees, costs and expenses of such registration under Section 2.1 and the
additional fees costs and expenses as may be incurred as a result of the
exercise of rights under Section 2.3 hereof shall be born by the beneficial
owners of Sellers Stock being so registered.

                    (c) The fees, costs and expenses of registration to be borne
as provided in Section 2.5 (a) above shall include, without limitation, all
registration, filing and National Association of Security Dealers' fees,
printing expenses, fees and disbursements of counsel and accountants for
Guaranty, fees and disbursements of underwriters of such securities, all legal
fees and disbursements and other expenses of complying with state securities or
blue sky laws of any jurisdictions in which the securities to be offered are to
be registered or qualified, and premiums and other costs of policies of
insurance against liability arising out of such public offering, but not the
fees and disbursements

                                      B-4-4
                                                   
<PAGE>   30
of counsel and accountants for the beneficial owners of the Sellers Stock or
Guaranty Note Holders, as the case may be.

                    2.6  Indemnification.

                    (a) Guaranty will indemnify and hold harmless each of the
beneficial owners of the Sellers Stock or Guaranty Note Holders and any
underwriter (as defined in the Securities Act) for the beneficial owners of the
Sellers Stock or Guaranty Note Holders, and each person who is an officer or
director of or who controls the beneficial owners of the Sellers Stock, the
holders of Guaranty Notes or such underwriter within the meaning of the
Securities Act, from beneficial owners of the Sellers Stock, Guaranty Note
Holders and each such underwriter and person with respect to, any and all
claims, actions, demands, losses, damages, liabilities, attorneys' fees, costs
and other expenses to which the beneficial owners of the Sellers Stock, Guaranty
Note Holders or any such underwriter or controlling person may become subject
under the Securities Act or otherwise, insofar as such claims, actions, demands,
losses, damages, liabilities, costs, attorneys' fees or other expenses arise out
of or are based upon any untrue statement or alleged untrue statement of any
material fact contained in such registration statement, any prospectus contained
therein or any amendment or supplement thereto, or arise out of or are based
upon the omission or alleged omission to state therein or necessary to make the
statements therein, in light of the circumstances in which they were made not
misleading; provided, however, that Guaranty will not be liable in any such case
to the extent that any such claim, action, demand, loss, damage, liability,
cost, attorneys' fees or other expense is caused by an untrue statement or
alleged untrue statement or omission or alleged omission so made in strict
conformity with information furnished by the beneficial owners of the Sellers
Stock or any Guaranty Note Holders, such underwriter or such controlling person
in writing specifically for use in the preparation thereof.

                    (b) Each of the beneficial owners of the Sellers Stock or
Guaranty Note Holder that are to be included in any registrations under this
Agreement will indemnify and hold harmless Guaranty, and any underwriter (as
defined in the Securities Act) for Guaranty, and each person who is an officer
or director of or who controls Guaranty or such underwriter within the meaning
of the Securities Act, from and against, and will reimburse Guaranty with
respect to, any and all claims, actions, demands, losses, damages, liabilities,
costs or expenses to which Guaranty may become subject under the Securities Act
or otherwise, insofar as such claims, actions, demands, losses, damages,
liabilities, costs or expenses to which Guaranty may become subject under the
Securities Act or otherwise, insofar as such claims,

                                      B-5-5
                                                   
<PAGE>   31
actions, demands, losses, damages, liabilities, costs, attorneys' fees or other
expenses are caused by any untrue or alleged untrue statement of any material
fact contained in such registration statement, any prospectus contained therein
or any amendment or supplement thereto, or are caused by the omission or the
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein, in light of circumstances in which
they are made, not misleading, in each case to the extent, but only to the
extent, that such untrue statement or alleged untrue statement or omission or
alleged omission was so made in reliance upon and in strict conformity with
written information furnished by a beneficial owner of the Sellers Stock or
Guaranty Note Holders specifically for use in the preparation thereof.

                    (c) Promptly after receipt by an indemnified party pursuant
to the provisions of paragraphs (a) or (b) of this Section 2.6 of notice of
commencement of any action involving he subject matter of the foregoing
indemnity provisions, such indemnified party will, if a claim thereof is to be
made against the indemnifying party pursuant to the provisions of paragraphs (a)
and (b), notify the indemnifying party of the commencement hereof, but the
omission so to notify the indemnifying party will not relieve it from any
liability which it may have to an indemnified party otherwise than under this
Section 2.6. In case such action is brought against any indemnified party and it
notifies the indemnifying party of the commencement thereof, the indemnifying
party shall have the right to participate in and, to the extent that it may
wish, assume the defense thereof, with counsel reasonably satisfactory to such
indemnified party, and after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof, the
indemnifying party will not be liable to such indemnified party pursuant to the
provisions of paragraphs (a) and (b) for any legal or other expense subsequently
incurred by such indemnified party in connection with the defense thereof, other
than reasonable costs of investigation. No indemnifying party shall be liable to
an indemnified party for any settlement of any action or claim without the
consent of the indemnifying party.

                    2.7 Reporting Requirements Under the Securities Exchange Act
of 1934. Guaranty shall take such reasonable measures, and shall file such other
information, documents and reports as shall be required by the Commission as a
condition to the availability of Rule 144 under the Securities Act (or any
similar exemptive provision hereafter in effect) and the use of Form S-3.
Guaranty also covenants to use its best efforts, to the

                                      B-6-6
                                                 
<PAGE>   32
extent that it is reasonably within its power to do so, to qualify for the use
of Form S-3.

                    2.8 Standoff. Orion and the Selling Shareholders agree in
connection with any underwritten public offering of Guaranty's securities that,
upon the request of the managing underwriter of such public offering, it shall
commit itself not to offer or sell publicly any Sellers Stock, or Guaranty
Notes, other than such stock or Guaranty Notes included in a public offering,
for a period not to exceed 120 days from the closing of such public offering.

                                      B-7-7
                                                 


<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                 Schedule 13E-3

                        Rule 13e-3 Transaction Statement

           (Pursuant to Section 13(e) of the Securities Exchange Act
             of 1934 and Rule 13e-3 (Section 240.13e-3) thereunder)

                         Guaranty National Corporation
                              (Name of the Issuer)

                           Orion Capital Corporation
                       The Connecticut Indemnity Company
                    Connecticut Specialty Insurance Company
                     Design Professionals Insurance Company
                             EBI Indemnity Company
                      Employee Benefits Insurance Company
             The Fire and Casualty Insurance Company of Connecticut
                      Security Insurance Company of Hartford
                      (Name of Person(s) Filing Statement)

                    Common Stock, par value $1.00 Per Share
                         (Title of Class of Securities)

                                   401192109              
                     (CUSIP Number of Class of Securities)

                            Michael P. Maloney, Esq.
                           Orion Capital Corporation
                                600 Fifth Avenue
                         New York, New York 10020-2302
                                 (212) 332-8080                 
                 (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications
                    on Behalf of Person(s) Filing Statement)

                                    Copy to:

                              John J. McCann, Esq.
                        Donovan Leisure Newton & Irvine
                              30 Rockefeller Plaza
                            New York, New York 10112
                                 (212) 632-3000
<PAGE>   2
         This statement is filed in connection with (check the appropriate box):

a.       / /  The filing of solicitation materials or an information statement
subject to Regulation 14A [17 CFR 240.14a-1 to 240.14b-1]. Regulation 14C [17
CFR 240.14c-1 to 240.14c-101] or Rule 13e-3(c) [Section 240.13e-3(c)] under the
Securities Exchange Act of 1934.  [Amended in Release No. 34-23789 ( 84,044),
effective January 20, 1987, 51 F.R. 42048.]

b.       / / The filing of a registration statement under the
Securities Act of 1933.

c.       /X/ A tender offer.

d.       / / None of the above.

Check the following box if the soliciting materials or information statement
referred to in checking box (a) are preliminary copies: / /

Calculation of Filing Fee


<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
           Transaction
            valuation                        Amount of filing fee
           -----------                       --------------------
           <S>                                      <C>
           $80,500,000                              $16,100
- --------------------------------------------------------------------------------
</TABLE>


*        For purposes of calculating the filing fee only.  This calculation
         assumes the purchase of 4,600,000 shares of common stock, par value
         $1.00 per share, of Guaranty National Corporation at $17.50 net per
         share in cash.

**       The amount of the filing fee, calculated in accordance with Rule
         0-11(b) of the Securities Exchange Act of 1934, as amended, equals
         1/50th of one percent of the aggregate cash value offered for such
         number of shares.

/X/ Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
and identify the filing with which the offsetting fee was previously paid.
Identify the previous filing by registration statement number, or the Form or
Schedule and the date of its filing.

Amount Previously Paid:  $16,100

Form or Registration No.:  Schedule 14D-1


                                      -2-
<PAGE>   3
Filing Parties:  Orion Capital Corporation
                 The Connecticut Indemnity Company
                 Connecticut Specialty Insurance Company
                 Design Professionals Insurance Company
                 EBI Indemnity Company
                 Employee Benefits Insurance Company
                 The Fire and Casualty Insurance Company of
                   Connecticut
                 Security Insurance Company of Hartford

Date Filed: May 8, 1996





                                      -3-
<PAGE>   4
         This Rule 13e-3 Transaction Statement (this "Statement") relates to a
tender offer by Orion Capital Corporation, a Delaware corporation ("Orion"), and
the following of its wholly-owned insurance subsidiaries:  The Connecticut
Indemnity Company, Connecticut Specialty Insurance Company, Design Professionals
Insurance Company, EBI Indemnity Company, Employee Benefits Insurance Company,
The Fire and Casualty Insurance Company of Connecticut, Security Insurance
Company of Hartford (collectively with Orion, the "Purchasers"), to purchase up
to 4,600,000 shares of common stock, par value $1.00 per share (the "Shares"),
of Guaranty National Corporation, a Colorado corporation (the "Company"), at a
price of $17.50 per Share, net to the seller in cash, upon the terms and subject
to the conditions set forth in the Offer to Purchase dated May 8, 1996 (the
"Offer to Purchase") and in the related Letter of Transmittal (which together
constitute the "Offer"), copies of which are filed as Exhibits (d)(1) and (d)(2)
hereto, respectively, and are incorporated by reference herein in their
entirety.

         This Statement is being filed jointly by the Purchasers.  By filing
this Schedule 13E-3, none of the joint signatories concedes that Rule 13E-3
under the Securities Exchange Act of 1934, as amended, is applicable to the
Offer or the other transactions contemplated by the Offer to Purchase.

         The following cross reference sheet is being supplied pursuant to
General Instruction F to Schedule 13E-3 and shows the location, in the Schedule
14D-1 (the "Schedule 14D-1") filed by the Purchasers with the Securities and
Exchange Commission on the date hereof, of the information required to be
included in response to the items of this Statement.  The information in the
Schedule 14D-1 which is attached hereto as Exhibit (g)(3), including all
exhibits thereto, is hereby expressly incorporated herein by reference and the
responses to each item are qualified in their entirety by the provisions of the
Schedule 14D-1.





                                      -4-
<PAGE>   5
                             CROSS REFERENCE SHEET

    Item in                                                    Where located in
Schedule 13E-3                                                  Schedule 14D-1
- --------------                                                 ----------------
Item 1(a)                                                         Item 1(a)
Item 1(b)                                                         Item 1(b)
Item 1(c) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 1(c)
Item 1(d) . . . . . . . . . . . . . . . . . . . . . . . . .           *
Item 1(e) . . . . . . . . . . . . . . . . . . . . . . . . .           *
Item 1(f) . . . . . . . . . . . . . . . . . . . . . . . . .           *
Item 2(a) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(a)
Item 2(b) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(b)
Item 2(c) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(c)
Item 2(d) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(d)
Item 2(e) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(e)
Item 2(f) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(f)
Item 2(g) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 2(g)
Item 3(a)(1)  . . . . . . . . . . . . . . . . . . . . . . .       Item 3(a)
Item 3(a)(2)  . . . . . . . . . . . . . . . . . . . . . . .       Item 3(b)
Item 3(b) . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 4  . . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 5  . . . . . . . . . . . . . . . . . . . . . . . . . .       Item 5
Item 6(a) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 4(a)
Item 6(b) . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 6(c) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 4(b)
Item 6(d) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 4(c)
Item 7(a) . . . . . . . . . . . . . . . . . . . . . . . . .       Item 5
Item 7(b) . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 7(c) . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 7(d) . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 8  . . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 9  . . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 10(a)  . . . . . . . . . . . . . . . . . . . . . . . .       Item 6(a)
Item 10(b)  . . . . . . . . . . . . . . . . . . . . . . . .       Item 6(b)
Item 11 . . . . . . . . . . . . . . . . . . . . . . . . . .       Item 7
Item 12 . . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 13 . . . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 14(a)  . . . . . . . . . . . . . . . . . . . . . . . .       Item 9
Item 14(b)  . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 15(a)  . . . . . . . . . . . . . . . . . . . . . . . .          *
Item 15(b)  . . . . . . . . . . . . . . . . . . . . . . . .       Item 8
Item 16 . . . . . . . . . . . . . . . . . . . . . . . . . .       Item 10(f)
Item 17 . . . . . . . . . . . . . . . . . . . . . . . . . .       separately
                                                                   included
                                                                   herewith
___________________

*        The Item is not required by Schedule 14D-1, is inapplicable or the
         answer thereto is in the negative.


                                      -5-
<PAGE>   6
ITEM 1.  ISSUER AND CLASS OF SECURITY SUBJECT TO TRANSACTION.

                 (a)  The information set forth in "INTRODUCTION" and "THE
OFFER -- Section 7.  Certain Information Concerning the Company" of the Offer
to Purchase is incorporated herein by reference.

                 (b)  The information set forth in "INTRODUCTION" and "THE
OFFER -- Section 6.  Effect of the Offer on the Market for the Shares;
Quotation on the NYSE; Registration Under the Exchange Act" of the Offer to
Purchase is incorporated herein by reference.

                 (c)  The information set forth in "THE OFFER -- Section 5.
Price Range of Shares; Dividends" of the Offer to Purchase is incorporated
herein by reference.

                 (d)  The information set forth in "THE OFFER -- Section 5.
Price Range of Shares; Dividends" and "THE OFFER -- Section 9.  Dividends and
Distributions" of the Offer to Purchase is incorporated herein by reference.

                 (e)  The information set forth in "SPECIAL FACTORS --
Background of the Transaction" of the Offer to Purchase is incorporated herein
by reference.

                 (f)  The information set forth in "SPECIAL FACTORS --
Background of the Transaction;" SPECIAL FACTORS -- Interests of Certain Persons
in the Transaction; Securities Ownership; Related Transactions" and "THE OFFER
- -- Section 8.  Certain Information Concerning the Purchasers" of the Offer to
Purchase is incorporated herein by reference.

ITEM 2.  IDENTITY AND BACKGROUND.

                 (a)-(d) and (g)  This Statement is being filed by the
Purchasers.  The information set forth in "INTRODUCTION," "THE OFFER -- Section
8.  Certain Information Concerning the Purchasers" and Schedule I of the Offer
to Purchase is incorporated herein by reference.

                 (e) and (f)  During the last five years, neither the
Purchasers nor to the best of their knowledge any of the persons listed in
Schedule I of the Offer to Purchase, (i) has been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors), or (ii) was
a party to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding was or is subject to a
judgment, decree or final order enjoining further violations of, or prohibiting
activities subject to, federal or state securities laws or finding any
violation of such laws.


                                      -6-
<PAGE>   7
ITEM 3.  PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS.

                 (a)-(b)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Fairness of the
Offer," "SPECIAL FACTORS --"Interests of Certain Persons in the Transaction;
Securities Ownership; Related Transactions," and "THE OFFER -- Section 8.
Certain Information Concerning the Purchasers" of the Offer to Purchase is
incorporated herein by reference.

ITEM 4.  TERMS OF THE TRANSACTION.

                 (a)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Purpose and Structure of the Transaction; Plans for the Company
After the Offer," "THE OFFER -- Section 1.  Terms of the Offer; Expiration
Date," "THE OFFER -- Section 2.  Acceptance for Payment and Payment for
Shares," "THE OFFER -- Section 3.  Procedures for Accepting the Offer and
Tendering Shares," "THE OFFER --Section 4.  Withdrawal Rights," "THE OFFER --
Section 9.  Dividends and Distributions" and "THE OFFER -- Section 10.  Certain
Conditions of the Offer" of the Offer to Purchase is incorporated herein by
reference.

                 (b)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Certain Effects
of the Transaction" and "SPECIAL FACTORS -- Interests of Certain Persons in the
Transaction; Securities Ownership; Related Transactions" of the Offer to
Purchase is incorporated herein by reference.

ITEM 5.  PLANS OR PROPOSALS OF THE ISSUER OR AFFILIATE.

                 (a)-(g)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Fairness of the
Offer," "SPECIAL FACTORS --Purpose and Structure of the Transaction; Plans for
the Company After the Offer," "SPECIAL FACTORS -- Certain Effects of the
Transaction" and "THE OFFER -- Section 6.  Effect of the Offer on the Market
for the Shares; Quotation on NYSE; Registration Under the Exchange Act" of the
Offer to Purchase is incorporated herein by reference.

ITEM 6.  SOURCE AND AMOUNTS OF FUNDS OR OTHER CONSIDERATION.

                 (a),(c)  The information set forth in" "SPECIAL FACTORS --
Source and Amount of Funds -- Financing of the Offer" of the Offer to Purchase
is incorporated herein by reference.

                 (b)  The information set forth in "THE OFFER -- Section


                                      -7-
<PAGE>   8
12.  Fees and Expenses" of the Offer to Purchase is incorporated herein by
     reference.

                 (d)  Not applicable.

ITEM 7.  PURPOSE(S), ALTERNATIVES, REASONS AND EFFECTS.

                 (a)-(d)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Fairness of the
Offer," "SPECIAL FACTORS --Purpose and Structure of the Transaction; Plans for
the Company After the Offer," "SPECIAL FACTORS -- Interests of Certain Persons
in the Transaction; Securities Ownership; Related Transactions," "SPECIAL
FACTORS -- Certain Effects of the Transaction," "SPECIAL FACTORS -- Certain
Federal Income Tax Consequences," "THE OFFER -- Section 6.  Effect of the Offer
on the Market for the Shares; Quotation on NYSE; Registration Under the
Exchange Act," "THE OFFER --Section 7.  Certain Information Concerning the
Company," "THE OFFER -- Section 8.  Certain Information Concerning the
Purchasers" and "THE OFFER -- Section 11.  Certain Legal Matters" of the Offer
to Purchase is incorporated herein by reference.

ITEM 8.  FAIRNESS OF THE TRANSACTION.

                 (a),(b),(f)  The information set forth in "INTRODUCTION,"
"SPECIAL FACTORS -- Background of the Transaction" and "SPECIAL FACTORS --
Fairness of the Offer" of the Offer to Purchase is incorporated herein by
reference.

                 (c)-(e)   Not applicable.

ITEM 9.  REPORTS, OPINIONS, APPRAISALS AND CERTAIN NEGOTIATIONS.

                 (a)  The information set forth in "SPECIAL FACTORS --Fairness
of the Offer" of the Offer to Purchase is incorporated herein by reference.

                 (b)-(c)  Not applicable.

ITEM 10.  INTEREST IN SECURITIES OF THE ISSUER.

                 (a)-(b)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Background of the Transaction," "SPECIAL FACTORS -- Purpose and
Structure of the Transaction; Plans for the Company After the Offer," "SPECIAL
FACTORS --Interests of Certain Persons in the Transaction; Securities
Ownership; Related Transactions," "THE OFFER -- Section 8.  Certain Information
Concerning the Purchasers" and Schedule I of the Offer to Purchase is
incorporated herein by reference.


                                      -8-
<PAGE>   9
ITEM 11.  CONTRACTS, ARRANGEMENTS OR UNDERSTANDINGS WITH
          RESPECT TO THE ISSUER'S SECURITIES.

                 The information set forth in "INTRODUCTION," "SPECIAL FACTORS
- -- Background of the Transaction," "SPECIAL FACTORS - - Certain Effects of the
Transaction," "SPECIAL FACTORS -- Interests of Certain Persons in the
Transaction; Securities Ownership; Related Transactions," "THE OFFER --Section
8.  Certain Information Concerning the Purchasers" and "THE OFFER -- Section
11.  Certain Legal Matters" of the Offer to Purchase is incorporated herein by
reference.

ITEM 12.  PRESENT INTENTION AND RECOMMENDATION OF CERTAIN
          PERSONS WITH REGARD TO THE TRANSACTION.

                 (a)  The information set forth in "SPECIAL FACTORS --
Interests of Certain Persons in the Transaction; Securities Ownership; Related
Transactions" of the Offer to Purchase is incorporated herein by reference.

                 (b)  The information set forth in "SPECIAL FACTORS --Interests
of Certain Persons in the Transaction; Securities Ownership, Related
Transactions" of the Offer to Purchase is incorporated herein by reference.

ITEM 13.  OTHER PROVISIONS OF THE TRANSACTION.

                 (a)  The information set forth in "SPECIAL FACTORS
- --Dissenters' Rights" of the Offer to Purchase is incorporated herein by
reference.

                 (b)  Not Applicable.

                 (c)  Not Applicable.

ITEM 14.  FINANCIAL INFORMATION.

                 (a)  The information set forth in "THE OFFER -- Section 7.
Certain Information Concerning the Company" and the information set forth on
pages 33 through 56 of Guaranty National Corporation's Annual Report on Form
10-K for the year ended December 31, 1995, filed as Exhibit (g)(1) hereto, and
pages 3 through 9 of Guaranty National Corporation's quarterly report on
Form 10-Q for the quarter ended March 31, 1996, filed as Exhibit (g)(2) hereto
is incorporated herein by reference.

                 (b)  Not applicable.

ITEM 15.  PERSONS AND ASSETS EMPLOYED, RETAINED OR UTILIZED.

                 (a)  The information set forth in "INTRODUCTION," "SPECIAL
FACTORS -- Purpose and Structure of the Transaction; Plans for the Company
After the Offer,"


                                      -9-
<PAGE>   10
"SPECIAL FACTORS -- Interests of Certain Persons in the Transaction; Securities
 Ownership; Related Transactions" "SPECIAL FACTORS -- Source and Amount of
 Funds -- Financing of the Offer" and "THE OFFER -- Section 12.  Fees and
 Expenses" of the Offer to Purchase is incorporated herein by reference.

                 (b)  The information set forth in "INTRODUCTION," and "THE
OFFER -- Section 12.  Fees and Expenses" of the Offer to Purchase is
incorporated herein by reference.

ITEM 16.  ADDITIONAL INFORMATION.

                 Additional information concerning the Offer is set forth in
the Offer to Purchase and the Letter of Transmittal relating to the Shares,
which are attached hereto as Exhibits (d)(1) and (d)(2), respectively.

ITEM 17.  MATERIAL TO BE FILED AS EXHIBITS.

                 (a)  Not applicable.

                 (b)  Not applicable.

                 (c)(1)  Shareholder Agreement, dated November 7, 1991, by and
among Guaranty National Corporation, Orion Capital Corporation, The Connecticut
Indemnity Company, Connecticut Specialty Insurance Company, Design
Professionals Insurance Company, Employee Benefits Insurance Company, The Fire
and Casualty Insurance Company of Connecticut, Security Insurance Company of
Hartford and Security Reinsurance Company.

                 (c)(2)  Amendment to Shareholder Agreement, dated February 2,
1994, by and among Guaranty National Corporation, Orion Capital Corporation,
The Connecticut Indemnity Company, Connecticut Specialty Insurance Company,
Design Professionals Insurance Company, Employee Benefits Insurance Company,
The Fire and Casualty Insurance Company of Connecticut, Security Insurance
Company of Hartford and Security Reinsurance Company.

                 (c)(3) Amendment to Shareholder Agreement, dated March 2,
1995, by and among Guaranty National Corporation, Orion Capital Corporation,
The Connecticut Indemnity Company, Connecticut Specialty Insurance Company,
Design Professionals Insurance Company, Employee Benefits Insurance Company,
The Fire and Casualty Insurance Company of Connecticut, Security Insurance
Company of Hartford and Security Reinsurance Company.

                 (c)(4) Note Issuance Agreement, as Amended and Restated as of
June 14, 1995, by and among Guaranty National Corporation, Orion Capital
Corporation, The Connecticut


                                      -10-
<PAGE>   11
Indemnity Company, Connecticut Specialty Insurance Company, Design
Professionals Insurance Company, Employee Benefits Insurance Company, EBI
Indemnity Company, The Fire and Casualty Insurance Company of Connecticut,
Security Insurance Company of Hartford, Security Reinsurance  and SecurityRe,
Inc.

                 (d)(1)  Offer to Purchase dated May 8, 1996.

                 (d)(2)  Letter of Transmittal.

                 (d)(3)  Notice of Guaranteed Delivery.

                 (d)(4)  Letter to Securities Dealers, Commercial Banks and
Trust Companies.

                 (d)(5)  Letter from Brokers, Dealers, Commercial Banks, Trust
Companies, and Nominees to their clients.

                 (d)(6)  Press Release dated May 7, 1996.

                 (d)(7)  Summary Advertisement dated May 8, 1996.

                 (d)(8)  Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9.

                 (e)  Not Applicable.

                 (f)  Not Applicable.

                 (g)(1)  Pages 33 through 56 of the Guaranty National
Corporation's Annual Report on Form 10-K for the year ended December 31, 1995.

                 (g)(2)  Pages 3 through 9 of the Guaranty National
Corporation's Quarterly Report on Form 10-Q for the quarter ended March 31,
1996.

                 (g)(3)  Tender Offer Statement on Schedule 14D-1 of Orion
Capital Corporation, The Connecticut Indemnity Company, Connecticut Specialty
Insurance Company, Design Professionals Insurance Company, EBI Indemnity
Company, Employee Benefits Insurance Company, The Fire and Casualty Insurance
Company of Connecticut, Security Insurance Company of Hartford dated May 8,
1996.


                                      -11-
<PAGE>   12
                                   SIGNATURE

                 After due inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete
and correct.

Dated:  May 8, 1996

                                       ORION CAPITAL CORPORATION


                                       By /s/ Alan R. Gruber
                                         ---------------------------------------
                                         Name:  Alan R. Gruber
                                         Title: Chairman & Chief Executive
                                                Officer


                                       THE CONNECTICUT INDEMNITY COMPANY

                                       CONNECTICUT SPECIALTY INSURANCE
                                         COMPANY

                                       DESIGN PROFESSIONALS INSURANCE
                                         COMPANY

                                       EBI INDEMNITY COMPANY

                                       EMPLOYEE BENEFITS INSURANCE COMPANY

                                       THE FIRE AND CASUALTY INSURANCE
                                         COMPANY OF CONNECTICUT

                                       SECURITY INSURANCE COMPANY OF
                                         HARTFORD


                                       By /s/ Alan R. Gruber
                                         ---------------------------------------
                                         Name:  Alan R. Gruber
                                         Title: Chairman





                                      -12-


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