DIGEX INC
SB-2/A, 1996-07-23
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>
 
     
  AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 23, 1996     
 
                                                     REGISTRATION NO. 333-05871
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
                                
                             AMENDMENT NO. 2     
                                      TO
                                   FORM SB-2
                            REGISTRATION STATEMENT
 
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                              DIGEX, INCORPORATED
                (NAME OF SMALL BUSINESS ISSUER IN ITS CHARTER)
 
        MARYLAND                     4813                    52-1672337
     (STATE OR OTHER           (PRIMARY STANDARD            (IRS EMPLOYER
     JURISDICTION OF              INDUSTRIAL           IDENTIFICATION NUMBER)
    INCORPORATION OR          CLASSIFICATION CODE
      ORGANIZATION)                 NUMBER)
 
                               ----------------
                            
                         6800 VIRGINIA MANOR ROAD     
                          BELTSVILLE, MARYLAND 20705
                                (301) 847-5000
                         (ADDRESS AND TELEPHONE NUMBER
        OF PRINCIPAL EXECUTIVE OFFICES AND PRINCIPAL PLACE OF BUSINESS)
 
                               ----------------
    
 CHRISTOPHER R. MCCLEARY, CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER     
                            
                         6800 VIRGINIA MANOR ROAD     
                          BELTSVILLE, MARYLAND 20705
                                (301) 847-5000
                     (NAME, ADDRESS, AND TELEPHONE NUMBER
                             OF AGENT FOR SERVICE)
 
                               ----------------
 
                                  Copies to:
       JOHN D. WATSON, JR., ESQ.                 JOHN W. WHITE, ESQ.
           LATHAM & WATKINS                    CRAVATH, SWAINE & MOORE
    1001 PENNSYLVANIA AVENUE, N.W.                 WORLDWIDE PLAZA
              SUITE 1300                          825 EIGHTH AVENUE
      WASHINGTON, D.C. 20004-2505           NEW YORK, NEW YORK 10019-7475
            (202) 637-2200                         (212) 474-1000
 
                               ----------------
 
               APPROXIMATE DATE OF PROPOSED SALE TO THE PUBLIC:
     AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THIS REGISTRATION
                                  STATEMENT.
 
                               ----------------
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                               ----------------
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION
STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING
PURSUANT TO SECTION 8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                              DIGEX, INCORPORATED
 
                             CROSS REFERENCE SHEET
 
                 Showing Location in Prospectus of Information
                     Required by Part I Items of Form SB-2
 
<TABLE>
<CAPTION>
                                                   LOCATION OR HEADING IN THE
                                                   PROSPECTUS OR REGISTRATION
      FORM SB-2 ITEM NUMBER AND CAPTION                    STATEMENT
      ---------------------------------        ---------------------------------
 <C> <S>                                       <C>
  1. Front of Registration Statement and
     Outside Front Cover of Prospectus......   Outside Front Cover Page; Front
                                               of Registration Statement
  2. Inside Front and Outside Back Cover
     Pages of Prospectus....................   Inside Front and Outside Back
                                               Cover Page
  3. Summary Information and Risk Factors...   Prospectus Summary; The Company;
                                               Risk Factors
  4. Use of Proceeds........................   Prospectus Summary; Use of
                                               Proceeds; Management's Discussion
                                               and Analysis of Financial
                                               Condition and Results of
                                               Operations
  5. Determination of Offering Price........   Outside Front Cover Page;
                                               Underwriting
  6. Dilution...............................   Risk Factors; Dilution
  7. Selling Security-Holders...............   *
  8. Plan of Distribution...................   Outside Front Cover Page;
                                               Underwriting
  9. Legal Proceedings......................   Business--Legal Proceedings
 10. Directors, Executive Officers,
     Promoters and Control Persons..........   Management
 11. Security Ownership of Certain
     Beneficial Owners and Management.......   Principal Stockholders
 12. Description of Securities..............   Capital Stock of the Company
 13. Interests of Named Experts and Counsel.   *
 14. Disclosure of Commission Position on
     Indemnification for Securities Act        Capital Stock of the Company--
     Liabilities............................   Limitation on Directors' and
                                               Officers' Liability
 15. Organization Within Last Five Years....   Certain Transactions
 16. Description of Business................   Prospectus Summary; Risk Factors;
                                               Management's Discussion and
                                               Analysis of Financial Condition
                                               and Results of Operations;
                                               Business
 17. Management's Discussion and Analysis or
     Plan of Operation......................   Management's Discussion and
                                               Analysis of Financial Condition
                                               and Results of Operations
</TABLE>
 
<PAGE>
 
<TABLE>
<CAPTION>
                                                   LOCATION OR HEADING IN THE
                                                   PROSPECTUS OR REGISTRATION
      FORM SB-2 ITEM NUMBER AND CAPTION                    STATEMENT
      ---------------------------------        ---------------------------------
 <C> <S>                                       <C>
 18. Description of Property................   Business--Properties
 19. Certain Relationships and Related         Certain Transactions; Principal
     Transactions...........................   Stockholders
 20. Market for Common Equity and Related
     Stockholder Matters....................   Risk Factors--No Prior Market for
                                               Common Stock; Dividend Policy;
                                               Capital Stock of the Company;
                                               Shares Eligible for Future Sale
 21. Executive Compensation.................   Management
 22. Financial Statements...................   Financial Statements
 23. Changes in and Disagreements with
     Accountants on Accounting and Financial   *
     Disclosure.............................
</TABLE>
- --------
* Inapplicable
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY SUCH STATE.                                                               +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                             SUBJECT TO COMPLETION
                                  
                               JULY 23, 1996     
PROSPECTUS
   
3,750,000 SHARES                 [LOGO FOR DIGEX BUSINESS INTERNET APPEARS HERE]
 
DIGEX, INCORPORATED
 
COMMON STOCK
($.01 PAR VALUE)
   
All of the shares of Common Stock, $.01 par value per share (the "Common
Stock"), offered hereby (the "Shares") are being sold by DIGEX, Incorporated
("DIGEX" or the "Company"). Prior to this offering (the "Offering"), there has
been no public market for the Common Stock. It is currently anticipated that
the initial public offering price will be between $12.00 and $14.00 per share.
See "Underwriting" for a discussion of the factors to be considered in
determining the initial public offering price.     
   
The Common Stock has been approved for quotation on the Nasdaq National Market
under the symbol "DIGX."     
 
SEE "RISK FACTORS" BEGINNING ON PAGE 8 FOR A DISCUSSION OF CERTAIN FACTORS THAT
SHOULD BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE SHARES.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
- --------------------------------------------------------------------------------
<TABLE>   
<CAPTION>
                                               PRICE TO UNDERWRITING PROCEEDS TO
                                               PUBLIC   DISCOUNT     COMPANY (1)
<S>                                            <C>      <C>          <C>
Per Share..................................... $        $            $
Total (2)..................................... $        $            $
</TABLE>    
- --------------------------------------------------------------------------------
          
(1) Before deducting expenses payable by the Company estimated at $950,000.
           
(2) The Company has granted the Underwriters a 30-day option to purchase up to
    an aggregate of 562,500 additional shares of Common Stock at the Price to
    Public, less the Underwriting Discount, solely to cover over-allotments, if
    any. If the Underwriters exercise such option in full, the total Price to
    Public, Underwriting Discount and Proceeds to Company will be $   , $
    and $   , respectively. See "Underwriting."     
 
The Shares are offered subject to receipt and acceptance by the Underwriters,
to prior sale and to the Underwriters' right to reject any order in whole or in
part and to withdraw, cancel or modify the offer without notice. It is expected
that delivery of the Shares will be made at the office of Salomon Brothers Inc,
Seven World Trade Center, New York, New York, or through the facilities of The
Depository Trust Company, on or about      , 1996.
 
SALOMON BROTHERS INC                                       MONTGOMERY SECURITIES
   
The date of this Prospectus is       , 1996.     
<PAGE>
 
 
 
                                   [ARTWORK]
                                   [TO COME]
 
 
 
 
IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK
OF THE COMPANY AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN
MARKET. SUCH TRANSACTIONS MAY BE EFFECTED IN THE OVER-THE-COUNTER MARKET
(INCLUDING THE NASDAQ NATIONAL MARKET) OR OTHERWISE. SUCH STABILIZING, IF
COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
                                       2
<PAGE>
 
                            ADDITIONAL INFORMATION
 
  The Company has filed with the Securities and Exchange Commission (the
"Commission") a Registration Statement on Form SB-2 under the Securities Act
with respect to the Common Stock offered hereby (the "Registration
Statement"). This Prospectus, which constitutes a part of the Registration
Statement, does not contain all of the information set forth in the
Registration Statement and the exhibits and schedules thereto. For further
information with respect to the Company and the shares of Common Stock offered
hereby, reference is hereby made to the Registration Statement, including the
exhibits, financial statements and schedules thereto. Statements contained in
this Prospectus regarding the contents of any contract or other document are
not necessarily complete; with respect to each such contract or document filed
as an exhibit to the Registration Statement, reference is made to the exhibit
for a more complete description of the matter involved, and each such
statement shall be deemed qualified in its entirety by such reference.
   
  As a result of this Offering, the Company will be subject to the
informational requirements of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and, in accordance therewith, will file reports and
other information with the Commission. A copy of the Registration Statement,
including the exhibits, financial statements and schedules thereto, may be
inspected without charge at the principal office of the Commission at
Judiciary Plaza, 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549 and
at its regional offices located at Seven World Trade Center, New York, New
York 10048 and Citicorp Center, 500 West Madison Street, Chicago, Illinois
60661, and copies of such material may be obtained from the Public Reference
Section of the Commission at Judiciary Plaza, 450 Fifth Street, N.W., Room
1024, Washington, D.C. 20549 upon payment of the fees prescribed by the
Commission. The Commission also maintains a Web site that contains
registration statements, reports, proxy and information statements and other
materials that are filed through the Commission's Electronic Data Gathering,
Analysis, and Retrieval system. This Web site can be accessed at
http://www.sec.gov.     
 
                            REPORTS TO STOCKHOLDERS
 
  The Company intends to furnish to its stockholders annual reports containing
consolidated financial statements audited by its independent certified public
accountants and quarterly reports containing unaudited summary financial
information for the first three quarters of each fiscal year.
 
                                       3
<PAGE>
 
 
                               PROSPECTUS SUMMARY
   
  The following summary is qualified in its entirety by the more detailed
information and financial statements, including the notes thereto, appearing
elsewhere in this Prospectus. Investors should carefully consider the
information set forth under "Risk Factors." Unless otherwise indicated, all
information in this Prospectus assumes (i) no exercise of the Underwriters'
over-allotment option, (ii) the issuance of 2,680,336 shares of common stock,
$.01 par value (the "Common Stock"), upon the conversion (the "Preferred Stock
Conversion") of all outstanding shares of the Company's Series A and Series B
convertible preferred stock, $1.00 par value (collectively, the "Preferred
Stock"), at or prior to the offering of Common Stock made hereby (the
"Offering"), (iii) the exercise of warrants to purchase 1,868,408 shares of
Common Stock concurrently with the Preferred Stock Conversion (the "Warrant
Exercise") and (iv) reincorporation of the Company as a Delaware corporation.
All share totals stated herein reflect the Company's 505.26-for-1 stock split
of March 1995, the 10-for-1 stock split of August 1995 and a 1-for-2.5 reverse
stock split which will occur in connection with the Offering. See "Glossary"
for the definitions of certain terms and acronyms used herein.     
 
                                  THE COMPANY
   
  DIGEX, Incorporated ("DIGEX" or the "Company") is a leading independent
national Internet service provider ("ISP") that focuses exclusively on
businesses, government agencies and other institutional customers ("business
customers"). The Company offers a comprehensive range of INDUSTRIAL STRENGTH
Internet solutions, including business connectivity, Web server hosting,
consulting and education services and security and other network products.
After receiving its first major infusion of institutional equity capital in
March 1995, the Company reoriented its strategy to focus exclusively on
business customers, who generally require high bandwidth connectivity, and also
began to develop its Web server hosting business. Additionally, the Company
brought in an experienced management team in the first quarter of 1996. As a
result, the Company's leased line and server customers have grown from
approximately 65 accounts at April 30, 1995 to approximately 840 accounts at
June 30, 1996.     
 
  The Company believes that Internet solutions are increasingly achieving
"mission critical" status for business customers as the role of the Internet
and corporate intranets grows. International Data Corporation ("IDC") has
estimated that the number of Internet users was approximately 56 million in
1995, approximately 71% of which (or 40 million) were business users, and that
the aggregate number of users will grow to approximately 200 million by 1999.
In addition, according to Netcraft, Ltd., the number of corporate Internet
sites, defined as domain names ending in ".com," has increased from 4,912 in
August 1995 to 171,738 in June 1996.
   
  DIGEX's nationwide network infrastructure provides Internet connectivity to
business customers in 24 U.S. metropolitan areas through 30 points of presence
("POPs"). Leveraging off a strong and well-established presence in the eastern
United States, the Company has embarked on a major expansion program which will
result in a total of 61 POPs (serving 48 U.S. metropolitan areas) by the end of
1996. The Company's network infrastructure is designed to provide business
customers with a high degree of reliability, enhanced performance and scalable
bandwidth. It uses Cisco Systems 7513 routers and a redundant clear channel DS-
3 loop architecture which provides 90 Mbps of coast-to-coast capacity,
monitored by a 24x7x365 network operations center ("NOC"). Unlike the network
infrastructure of regional ISPs, which typically connect at only one peering
point, the Company's network connects with the networks of other national ISPs
at the three major peering points across the U.S.     
 
                                       4
<PAGE>
 
 
  The Company's objective is to be a single-source provider of reliable high-
performance INDUSTRIAL STRENGTH Internet solutions that serve the needs of
business customers. To achieve this objective, the Company will focus
exclusively on business customers, expand and optimize its nationwide network,
provide a comprehensive range of Internet solutions, implement multiple
distribution channels for its solutions and focus on customer acquisition and
retention.
   
  As part of its distribution strategy, the Company is targeting
telecommunications service providers who wish to provide private label Internet
services to their customers without building their own facilities. The Company
recently entered into its first such multi-year private network agreements with
LCI International, Inc. ("LCI"), WinStar Communications, Inc. ("WinStar") and
Orion Atlantic, L.P. ("Orion"). The Company expects that its ability to attract
additional private network customers will be significantly enhanced by the
announcement of these agreements.     
   
  In June 1996, the Company entered into an agreement with Microsoft
Corporation ("Microsoft"), pursuant to which Microsoft's Consulting Services
Group will build a "Server Farm" for the Company with servers running
Microsoft's Windows NT operating system. The Company plans to introduce a
Windows NT hosted server product line in August 1996. The Company is currently
engaged in discussions with Microsoft to include DIGEX in Microsoft's Solution
Provider Program, which will result in the Company being designated a preferred
vendor for Microsoft's corporate customers. There can be no assurance that the
Company will consummate this agreement with Microsoft.     
   
  The Company was founded in 1990 by a group of Internet pioneers as a Maryland
corporation under the name "Digital Express Group, Inc." The Company, which is
now named "DIGEX, Incorporated," is reincorporating as a Delaware corporation
in connection with the Offering. The Company's principal executive offices are
located at 6800 Virginia Manor Road, Beltsville, Maryland 20705, and the
Company's telephone number is (301) 847-5000. The Company's Web site is located
at http://www.digex.net.     
 
                                       5
<PAGE>
 
 
                                  THE OFFERING
 
<TABLE>   
<S>                                            <C>
Common Stock Offered.........................  3,750,000 shares (1)
Common Stock Outstanding after the Offering..  9,863,991 shares (1)(2)
Use of Proceeds..............................  The Company intends to use the net
                                               proceeds of the Offering to fund the
                                               expansion of its network infrastructure,
                                               to acquire business-focused regional
                                               ISPs or to purchase their subscriber
                                               bases, to fund anticipated operating
                                               losses and for general corporate
                                               purposes. See "Use of Proceeds."
Nasdaq National Market Symbol................  DIGX
</TABLE>    
 
- --------
(1) Excludes shares of Common Stock subject to the Underwriters' over-allotment
    option granted by the Company.
   
(2) Based on the number of shares outstanding as of June 30, 1996 (assuming the
    Preferred Stock Conversion and the Warrant Exercise, both of which will
    occur at or prior to the consummation of the Offering). Does not include
    2,283,300 shares issuable upon the exercise of options at a weighted
    average exercise price of $2.79 per share presently outstanding under the
    Company's Incentive Stock Option Plan (the "1995 Stock Option Plan") and
    the Company's Equity Participation Plan (the "Equity Plan" and, together
    with the 1995 Stock Option Plan, the "Stock Option Plans"), as well as
    202,280 shares issuable upon the exercise of options authorized but not
    granted under the Equity Plan. See "Management--Incentive Stock Option
    Plans." Also does not include warrants to purchase 240,000 shares of Common
    Stock at an exercise price of $3.75 per share granted to WinStar in
    connection with the Company's private network agreement with WinStar (the
    "WinStar Warrants").     
 
 
 
 
  The Company has applied for federal registration of the following
servicemarks and trademarks: INDUSTRIAL STRENGTH Internet SM, WEBenefit
Series(TM), IntroWeb(TM), WEBenefit(TM), WebPlus(TM), WebPreferred(TM) and
WebPremier(TM). This Prospectus also includes product names and other trade
names of the Company and of other organizations.
 
                                       6
<PAGE>
 
 
                             SUMMARY FINANCIAL DATA
 
<TABLE>   
<CAPTION>
                                                                SIX MONTHS ENDED
                             YEARS ENDED DECEMBER 31,               JUNE 30,
                          ---------------------------------  -----------------------
                            1993       1994        1995         1995        1996
                          --------  ----------  -----------  ----------  -----------
<S>                       <C>       <C>         <C>          <C>         <C>
STATEMENT OF OPERATIONS
 DATA:
Revenue.................  $431,098  $1,577,609  $ 5,075,316  $1,665,432  $ 5,235,204
Costs and expenses:
 Cost of revenue........   216,656   1,002,503    4,471,500   1,321,663    5,246,961
 Sales and marketing....    18,326     263,075    1,710,234     561,093    2,587,472
 General and administra-
  tive..................   135,238     366,392    2,715,752     588,116    3,376,091
                          --------  ----------  -----------  ----------  -----------
Total expenses..........   370,220   1,631,970    8,897,486   2,470,872   11,210,524
                          --------  ----------  -----------  ----------  -----------
Income (loss) from oper-
 ations.................    60,878     (54,361)  (3,822,170)   (805,440)  (5,975,320)
Other income (expense):
 Interest and other in-
  come..................       --          --        72,002      17,453       47,746
 Interest expense.......       --      (23,693)    (226,745)    (45,249)  (1,167,149)
                          --------  ----------  -----------  ----------  -----------
                               --      (23,693)    (154,743)    (27,796)  (1,119,403)
                          --------  ----------  -----------  ----------  -----------
Income (loss) before in-
 come taxes.............    60,878     (78,054)  (3,976,913)   (833,236)  (7,094,723)
Income taxes............   (25,540)     (3,470)         --          --           --
                          --------  ----------  -----------  ----------  -----------
Net income (loss).......    35,338     (81,524)  (3,976,913)   (833,236)  (7,094,723)
Accretion of Preferred
 Stock to redemption
 value..................       --          --      (338,698)   (109,163)    (252,881)
                          --------  ----------  -----------  ----------  -----------
Net income (loss) at-
 tributable to common
 shareholders...........  $ 35,338  $  (81,524) $(4,315,611) $ (942,399) $(7,347,604)
                          ========  ==========  ===========  ==========  ===========
Pro forma net income
 (loss) per common
 share(1)...............                        $     (0.47)             $     (0.69)
                                                ===========              ===========
Pro forma average common
 and common equivalent
 shares outstanding(1)..                          8,254,069                8,689,950
                                                ===========              ===========
</TABLE>    
 
<TABLE>   
<CAPTION>
                                                             JUNE 30, 1996
                                                        ------------------------
                                                                      PRO FORMA
                                                                         AS
                                                          ACTUAL     ADJUSTED(2)
                                                        -----------  -----------
<S>                                                     <C>          <C>
BALANCE SHEET DATA:
Cash and cash equivalents..............................  $6,269,000  $50,656,500
Working capital (deficit)..............................  (6,018,179)  13,369,321
Total assets...........................................  18,841,779  63,229,279
Total indebtedness, less current portion...............   1,714,283    1,714,283
Mandatorily redeemable preferred stock.................  10,518,159          --
Total stockholders' equity (deficit)...................  (7,939,558)  46,966,101
</TABLE>    
- --------
   
(1) Pro forma net loss per common share adjusts historical earnings per share
    for the assumed conversion of convertible securities which are not included
    in the historical computations. These convertible securities will
    automatically convert into shares of Common Stock upon the consummation of
    the Offering. Historical net loss was reduced by $450,871 for the year
    ended December 31, 1995 and $1,311,347 for the six months ended June 30,
    1996 to adjust for interest expense and preferred stock accretion related
    to the convertible securities. See Note 2 to Financial Statements.     
   
(2) The pro forma as adjusted data give effect to (i) the Preferred Stock
    Conversion and the Warrant Exercise, both of which will occur upon
    consummation of the Offering and (ii) the issuance and sale by the Company
    of the shares of Common Stock offered hereby (at an assumed offering price
    of $13.00 per share, after deducting estimated underwriting discount and
    expenses of the Offering payable by the Company).     
 
 
                                       7
<PAGE>
 
                                 RISK FACTORS
   
  Investment in the Common Stock offered hereby involves a high degree of
risk. Prospective investors should carefully consider the factors set forth
below, together with the other information contained in this Prospectus,
before making a decision to purchase the Common Stock offered hereby.     
 
INTENSE COMPETITION
 
  The market for Internet connectivity services is extremely competitive.
There are no substantial barriers to entry, and the Company expects that
competition will intensify in the future.
   
  Currently, the Company's primary competitors are other ISPs focused on
business customers, including UUNET Technologies, Inc. ("UUNET"), BBN
Corporation ("BBN") and PSINet Inc. ("PSI"). UUNET, BBN and PSI, in
particular, all have significantly greater market presence and financial,
technological and personnel resources than the Company and have more extensive
network infrastructures than the Company. To a lesser extent, the Company
competes with other national and regional ISPs, of which there are currently
more than 1500, including NETCOM On-Line Communications Services, Inc.
("NETCOM"). The Company also currently competes with AT&T Corp. ("AT&T"), MCI
Communications Corporation ("MCI") and Sprint Corporation ("Sprint"). The
Telecommunications Act of 1996 is removing a number of regulatory obstacles to
the entry of other telecommunications companies into the Internet connectivity
market. Accordingly, the Company expects all of the other major
telecommunications service providers, including the Regional Bell Operating
Companies ("RBOCs"), to compete fully in the Internet connectivity market.
Deregulation of the telecommunications industry has already led to significant
horizontal integration through acquisitions and joint ventures, and the
Company expects these trends to continue.     
   
  The telecommunications companies with which the Company competes have access
to significantly greater financial, technological and personnel resources than
the Company and also have large existing business customer bases. In addition,
interexchange carriers ("IXCs"), including AT&T, MCI and Sprint, possess
existing nationwide telecommunications networks and generally face lower
infrastructure costs in providing Internet connectivity than the Company.
Although its WorldNet offering targets the consumer market, AT&T is party to
an agreement with BBN pursuant to which it can market BBN's business
connectivity services to AT&T's business customer base or, in the alternative,
provide its own Internet connectivity. In addition, MCI and British
Telecommunications P.L.C. have announced that they intend to merge their
international high-speed data networks and their Internet backbones, thus
offering their customers international Internet connectivity services.     
 
  Although local exchange carriers ("LECs"), such as the RBOCs, and
competitive access providers ("CAPs"), such as MFS Communications Company,
Inc. ("MFS"), do not currently possess nationwide networks, they generally
have lower communications costs than the Company in providing leased lines to
businesses in the areas in which they operate. Moreover, significant
consolidation among RBOCs, including SBC Communications Inc.'s recently-
announced proposal to acquire Pacific Telesis Group ("PacTel") and the
proposed merger of NYNEX Corp. and Bell Atlantic Corporation ("Bell
Atlantic"), could result in the expansion of networks which can compete for
Internet connectivity customers. In addition, MFS has announced that it has
agreed to acquire UUNET to offer its customers expanded Internet connectivity,
and PacTel has already announced an offering of consumer connectivity to
customers in California.
   
  Certain companies are also exploring the possibility of providing high-speed
data services using alternative delivery methods. For example, @Home, a joint
venture between Tele-Communications, Inc. and Kleiner Perkins Caufield &
Byers, has stated its intent to provide high-speed data services over cable
television plant, and Hughes Network Systems, Inc. ("HNS") has launched
DirecPC, which will deliver high-speed data through direct broadcast satellite
technology. If these technologies gain commercial acceptance, operators of
cable television and direct broadcast satellite systems could become
competitors of the Company. CAI Wireless Systems, Inc., a wireless cable
television service,     
 
                                       8
<PAGE>
 
also has announced that it has begun testing the first Internet connectivity
product delivered by wireless cable.
   
  The Company also competes, to a lesser extent, with certain on-line service
providers which offer Internet connectivity in conjunction with their primary
products or services. For example, Microsoft provides Internet connectivity
through its Microsoft Network, which was built by UUNET (in which Microsoft
holds a significant minority stake) and which is a standard integrated feature
of its Windows 95 operating system, and International Business Machines
Corporation ("IBM") offers its OS/2 WARP operating system preconfigured to
provide Internet connectivity through the Advantis network, which is
controlled by IBM. In addition, America Online, Inc. ("AOL"), CompuServe, Inc.
("CompuServe") and Prodigy Services Company ("Prodigy"), currently provide
Internet connectivity and have announced plans to offer expanded Internet
connectivity capabilities.     
 
  The market for Web server hosting services is highly fragmented and
extremely competitive. There are no substantial barriers to entry and the
Company expects that competition will intensify in the future. Currently the
Company's primary competitors are other ISPs, including BBN, UUNET and PSINet,
and companies whose primary business is developing and operating "Server
Farms," such as Internet Direct, Inc. ("Internet Direct"). In addition, many
organizations currently host Web servers at their own facilities.
 
  As a result of an increase in the number of competitors, and vertical and
horizontal integration in the industry, the Company currently encounters and
expects to encounter significant pricing pressure and other competition in the
future. Advances in technology as well as changes in the marketplace and the
regulatory environment are constantly occurring, and the Company cannot
predict the effect that ongoing or future developments may have on the
Internet connectivity and Web server hosting markets generally or on the
Company specifically. See "Risk Factors--Dependence Upon Product Development;
Risks of Changing Technology and Industry Standards" and "--Potential
Liability for Information Disseminated Over Network; Regulation."
 
DIFFICULTIES IN MANAGING GROWTH; NEW MANAGEMENT; NEED TO HIRE ADDITIONAL
PERSONNEL
 
  The rapid growth of the Company's business and its product and service
offerings has placed, and is expected to continue to place, a significant
strain on the Company's managerial, operational and accounting resources.
   
  Demands on the Company's operational and accounting information systems and
controls, including its billing, accounts receivable and payable tracking and
other accounting systems, have grown rapidly with the Company's expanding
customer base and its new focus on business customers. In the past, the
Company has experienced difficulties in billing its customers, pursuing
delinquent accounts receivable balances, recording payables in the proper
period, performing timely reconciliations of financial statement data on a
monthly basis and maintaining adequate accounting controls. These difficulties
were considered by the Company's independent auditors to be evidence of
material weaknesses in the internal control structure, as communicated to
management and the Board of Directors at the completion of the audit of the
Company's financial statements for the year ended December 31, 1995. The
Company has taken actions to upgrade and improve its accounting systems and
controls and to increase the number of qualified accounting personnel during
the six months ended June 30, 1996, and the Company's auditors, in connection
with their audit of the Company's financial statements for the six months
ended June 30, 1996, communicated to management and the Board of Directors
that they noted no material weaknesses involving the Company's internal
control structure and operations. Notwithstanding these upgrades and
improvements, additional actions with respect to the Company's accounting
systems and controls may be required, particularly if the Company should
experience significant additional growth.     
 
  Increasing demands for the Company's Internet solutions and related customer
support services have also created additional demands on the Company's network
infrastructure and technical support
 
                                       9
<PAGE>
 
   
and customer services personnel. The Company has in the past experienced
difficulties making installations on a timely basis and providing adequate
customer support. Although the Company has hired additional support and
customer service personnel and has established a 24x7x365 NOC, it is possible
that such difficulties will continue in the future.     
   
  The Company has a new management team and a substantial number of new
employees. At December 31, 1994, the Company had 32 employees, and at June 30,
1996, the Company had 195 employees. In addition, key members of the Company's
current management team, including Christopher R. McCleary, the Company's
Chairman, President and Chief Executive Officer; Thomas M. Brandt, Jr., the
Company's Senior Vice President, Finance and Administration, and Chief
Financial Officer; Brian M. Deobald, the Company's Vice President, Telecommute
Products Group; Earl P. Galleher, the Company's Vice President, Internet
Server Products Group; and Nicholas J. Magliato, the Company's Vice President,
Private Networks Group, have joined the Company since February 1996.     
 
  To manage its growth, the Company must continue to improve its operational
and accounting information systems and controls and must attract and retain
additional highly qualified management, financial, technical, sales and
marketing and customer service personnel. Any failure of the Company to manage
its growth effectively could have a material adverse effect on the Company's
business, financial condition and results of operations.
 
ACCUMULATED DEFICIT; NET LOSSES; LIMITED OPERATING HISTORY
   
  At June 30, 1996, the Company had an accumulated deficit of approximately
$11.8 million. The Company experienced net losses of approximately $4.0
million and $7.1 million in the year ended December 31, 1995 and in the six
months ended June 30, 1996, respectively. The Company is currently making
significant capital expenditures intended to expand the Company's network and
organizational infrastructure, expects to incur operating and net losses in
1996 and may continue to incur operating and net losses thereafter. The grant
of options through June 30, 1996 will result in a $3.8 million non-cash
compensation charge during the period July 1, 1996 through December 31, 1999.
There can be no assurance that the Company will achieve or sustain
profitability in the future.     
 
  Although the Company has been in existence since 1990, it reoriented its
strategy in March 1995 to focus exclusively on business customers. As a
result, prospective investors have limited relevant operating and financial
data upon which to base an evaluation of the Company and an investment in the
Common Stock offered hereby.
 
FUTURE CAPITAL NEEDS; UNCERTAINTY OF ADDITIONAL FINANCING; RISKS ASSOCIATED
WITH CURRENT FINANCING ARRANGEMENTS
   
  The Company currently anticipates that funds advanced by WinStar under the
terms of its private network agreement and the net proceeds of the 1996
Venture Financing (as defined) and the Offering, together with existing
financing arrangements and funds from operations, will be sufficient to meet
the Company's presently anticipated working capital and capital expenditure
requirements in 1996 and 1997. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations--Liquidity and Capital
Resources." However, the Company may need to raise additional funds through
public or private debt or equity financing in the event that the Company's
estimates of operating losses and capital requirements change or prove
inaccurate or in order for the Company to respond to unanticipated competitive
pressures or to take advantage of unanticipated opportunities. Such
opportunities could include the acquisition of business-focused regional ISPs
or the purchase of their subscriber bases, international expansion,
acquisitions of complementary businesses or technologies and the development
of new products. There can be no assurance that additional financing will be
available on terms favorable to the Company, or at all. If adequate funds are
not available or are not available on acceptable terms, the Company may not be
able to continue its network expansion, to take advantage of market
opportunities, to develop new products or otherwise     
 
                                      10
<PAGE>
 
to respond to competitive pressures. Such inability could have a material
adverse effect on the Company's business, financial condition and results of
operations.
   
  In addition, the Company's financing arrangements are secured by
substantially all of the Company's assets, require the Company to satisfy
certain financial covenants and restrict the payment of dividends. Such
collateral security arrangements entitle the Company's secured lenders to
foreclose upon the Company's assets in the event of a default under the
Company's financing arrangements and may adversely affect the Company's
ability to obtain additional financing.     
   
  The Company's obligations under its private network agreement with WinStar
are also secured by substantially all of the Company's assets. This security
interest will terminate by its terms upon the consummation of the Offering.
    
DEPENDENCE ON NETWORK INFRASTRUCTURE; MAINTENANCE OF PEERING RELATIONSHIPS
 
  The Company's success will depend upon the geographic reach, capacity,
reliability and security of its network infrastructure. The Internet is
comprised of many ISPs who operate their own networks and interconnect with
other ISPs at various peering points. The establishment and maintenance of
peering relationships with other ISPs is necessary in order to exchange
traffic with other ISPs without having to pay retail rates. The Company
expects the industry's current practice regarding peering to evolve by the end
of 1996 to require an ISP to have (i) a coast-to-coast DS-3 backbone, (ii) 45
Mbps connections to three U.S. peering points and (iii) a 24x7x365 NOC in
order to qualify for peering with the major national ISPs. Although the
Company currently meets these requirements, there is no assurance that other
national ISPs will maintain peering relationships with the Company. In
addition, there may develop increasing requirements associated with
maintaining peering with the major national ISPs with which the Company may
have to comply. The Company also expects to be required to expand and adapt
its network infrastructure in order to respond to its growing number of
customers, demands to transmit increasing amounts of data and changes to its
customers' product and service requirements. The expansion and adaptation of
the Company's network infrastructure will require substantial financial,
operational and managerial resources. There can be no assurance that the
Company will be able to expand or adapt its network infrastructure to meet the
industry's evolving standards or its customers' growing demand and changing
requirements on a timely basis, at a commercially reasonable cost, or at all,
or that the Company will be able to deploy successfully any expanded and
adapted network infrastructure.
 
RISKS TO PHYSICAL NETWORK; RISKS TO INTEGRITY OF DATA ON NETWORK
   
  The Company's operations are dependent upon its ability to protect its
network infrastructure against damage from fire, earthquakes, severe flooding,
mudslides, power loss, telecommunications failures and similar events or to
construct networks which are not vulnerable to the effects of these events. A
significant portion of the Company's computer equipment, including components
critical to the operation of its Internet backbone, is located at the
Company's facilities in Beltsville, Maryland. The Company experienced a four-
hour service interruption due to severe flooding in Pennsylvania in 1996. The
Company believes that this type of service interruption is not abnormal in the
industry. However the occurrence of a natural disaster or other unanticipated
problems at the Company's NOC, its hubs (sites at which the Company has
located routers, switches and other computer equipment which make up the
backbone of the Company's network infrastructure) or at a number of the
Company's POPs in the future could cause additional major interruptions in the
services provided by the Company.     
 
  In addition, some ISPs have in the past experienced interruptions in service
as a result of the accidental or intentional actions of Internet users,
current and former employees or others, and the Company has experienced
interruptions in service as a result of accidental or intentional actions of
Internet users. Further interruptions of service may occur in the future. In
the past, there have been break-ins to computers connected to the Internet at
General Electric Company, Sprint and IBM, as well
 
                                      11
<PAGE>
 
   
as the computer systems of NETCOM and the San Diego Supercomputer Center, and
there have also been incidents involving hackers bypassing firewalls and
stealing sensitive information. Unauthorized use of the Company's network
could jeopardize the security of confidential information stored in the
computer systems of the Company and its customers, which may result in
liability of the Company to its customers or deter potential subscribers. The
industry-standard network security measures in use by the Company have been
circumvented at other companies' facilities and educational facilities in the
past but not at the Company's facilities. However, there can be no assurance
that such measures will not be circumvented in the future at the Company.     
   
  The failure of the Company to adequately manage service disruptions
resulting from physical damage to its network or breaches of the network's
integrity, could have a material adverse effect on the Company's business,
financial condition and results of operations.     
 
DEPENDENCE UPON SUPPLIERS; LIMITED SOURCES OF SUPPLY
 
  The Company relies on other companies to supply certain key components of
its network infrastructure, including telecommunications services and
networking equipment which, in the quantities and quality demanded by the
Company, are available only from limited sources. MCI, which is a competitor
of the Company, and Cable & Wireless, Inc. ("Cable & Wireless") are the
Company's primary providers of data communications facilities and network
capacity and lease physical space to the Company for routers, modems and other
equipment. The Company is also dependent upon LECs and CAPs to provide
telecommunications services to the Company and its customers. The Company
expects these telecommunications companies to become competitors of the
Company as well. The Company has from time to time experienced delays in
receiving telecommunications services, and there can be no assurance that the
Company will be able to obtain such services on the scale and within the time
frames required by the Company at a commercially reasonable cost, or at all.
 
  Certain of the Company's suppliers, including the RBOCs and certain other
LECs, are currently subject to tariff controls and other price constraints
which in the future could be changed. In addition, due to the passage of the
Telecommunications Act of 1996, regulatory proposals are pending that will
affect the prices charged to the Company by the RBOCs and certain other LECs.
Any such regulatory changes could result in increased prices of services and
products to the Company. See "--Potential Liability for Information
Disseminated Over Network; Regulation."
 
DEPENDENCE UPON KEY PERSONNEL
   
  The Company's success will depend upon the continued service of its senior
management team and its technical, marketing and sales personnel. The
Company's employees, including members of its management team, may voluntarily
terminate their employment with the Company at any time, and competition for
qualified employees in the Internet industry is intense. Six senior executives
do, however, have employment agreements with the Company which run through
March or May 1997 (or, in the case of Christopher McCleary, the Company's
Chairman, President and Chief Executive Officer, through December 1999).
Although most of these employment agreements contain non-competition and non-
disclosure agreements, there can be no assurance that these provisions will be
enforceable in whole or in part. Except for key-person insurance the Company
maintains on Douglas E. Humphrey, its Senior Vice President, Chief Technology
Officer and co-founder, the Company does not maintain key-person insurance on
any executive officer of the Company. The loss of the services of key
personnel could have a material adverse effect upon the Company's business,
financial condition, and results of operations.     
 
DEPENDENCE UPON CONTINUED DEVELOPMENT OF BUSINESS MARKET
 
  A substantial portion of the Company's revenues to date have been, and
substantially all of the Company's revenues for the foreseeable future will
be, derived from the sale of its Internet solutions to business customers. The
Company's success will depend upon the continued development and
 
                                      12
<PAGE>
 
expansion of the business market for Internet solutions and the networks which
comprise the Internet, as well as the extent to which Internet connectivity
becomes critical to achievement of the objectives of the Company's business
customers. Certain key issues concerning the extensive use of the Internet by
business customers, including data security, network reliability, ease and
cost of access and quality of service remain unresolved and may impact the
growth of Internet use by business customers. In particular, numerous
published reports have indicated that a perceived lack of security of
commercial data, such as credit card numbers, has significantly impeded
commercial exploitation of the Internet to date, and there can be no assurance
that encryption or other technologies will be developed that satisfactorily
addresses these security concerns. The failure of the market for business-
related Internet solutions to continue to develop would adversely impact the
Company's business, financial condition and results of operations.
 
DEPENDENCE UPON PRODUCT DEVELOPMENT; RISKS OF CHANGING TECHNOLOGY AND INDUSTRY
STANDARDS
 
  The Company's success will depend upon its ability to respond to the rapidly
changing requirements of its business customers for Internet solutions. The
Internet industry is characterized by rapidly changing technology and evolving
industry standards, emerging competition and frequent new product and service
introductions. There can be no assurance that the Company can successfully
identify new product opportunities or develop and bring new products and
services to market in a timely manner. The Company is also at risk from
fundamental technological changes in the way Internet solutions are marketed
and delivered. Integrating technological advances may require substantial time
and expense, and there can be no assurance that the Company will succeed in
adapting its network infrastructure.
 
  In addition, new technologies or industry standards have the potential to
replace or provide lower cost alternatives to the Company's existing products
and services. The adoption of such new technologies or industry standards
could render the Company's existing products and services obsolete and
unmarketable. For example, the Company's services rely on the continued
widespread commercial use of Transmission Control Protocol/Internet Protocol
("TCP/IP"). Alternative open and proprietary protocol standards that compete
with TCP/IP, including proprietary protocols developed by IBM and Novell,
Inc., have been or are being developed.
 
  Failure of the Company to adapt to changes in technology and industry
standards would have a material adverse effect on the Company's business,
financial condition and results of operations.
 
POTENTIAL LIABILITY FOR INFORMATION DISSEMINATED OVER NETWORK; REGULATION
   
  The law relating to the liability of on-line service providers and ISPs for
information carried on or disseminated through the facilities of their
networks is currently unsettled. Several lawsuits seeking a judgment of such
liability are currently pending. In one case brought against an ISP, Religious
Technology Center v. Netcom On-Line Communication Services, Inc., the United
States District Court for the Northern District of California ruled in a
preliminary phase that under certain circumstances ISPs could be held liable
for copyright infringement. The case has not reached final judgment. The
Telecommunications Act of 1996 prohibits and imposes criminal penalties and
civil liability for using an interactive computer service for transmitting
certain types of information and content, such as indecent or obscene
communications. This provision has been declared unconstitutional by the
United States District Court for the Eastern District of Pennsylvania, which
has issued a preliminary injunction against its enforcement. The United States
Department of Justice has asked the United States Supreme Court to review the
decision. Numerous states have adopted or are currently considering similar
types of legislation. The imposition upon ISPs or Web server hosts of
potential liability for materials carried on or disseminated through their
systems could require the Company to implement measures to reduce its exposure
to such liability, which may require the expenditure of substantial resources
or the     
 
                                      13
<PAGE>
 
discontinuation of certain product or service offerings. The Company believes
that it is currently unsettled whether the Telecommunications Act of 1996
prohibits and imposes liability for any services provided by the Company
should the content of information transmitted be subject to the statute.
   
  Although the Company is not currently subject to direct regulation by the
Federal Communications Commission (the "FCC") or any other federal or state
agency, changes in the regulatory environment relating to the Internet
connectivity market, including regulatory changes which directly or indirectly
affect telecommunications costs or increase the likelihood or scope of
competition from the RBOCs or other telecommunications companies, could affect
the prices at which the Company may sell its services. For example, proposed
regulations at the FCC would require discounted Internet connectivity rates
for schools and libraries. The Company cannot predict the impact, if any, that
future regulation or regulatory changes may have on its business.     
 
POTENTIAL FLUCTUATIONS IN QUARTERLY OPERATING RESULTS
 
  The Company's quarterly operating results have in the past and may in the
future vary significantly depending upon a number of factors, such as the
pricing and mix of services and products sold by the Company, terminations of
service, new product introductions by the Company and its competitors, the
timing of the expansion of the Company's network infrastructure, market
acceptance of new and enhanced versions of the Company's products and
services, changes in pricing policies by its competitors, the Company's
ability to obtain sufficient supplies of limited source components and the
lengthening of the Company's sales cycle. Many of these factors are beyond the
Company's control. In addition, the timing of the installation of significant
orders by the Company's suppliers in the past has been, and in the future may
be, delayed by lags in the installations of lines and equipment by the
Company's telecommunications subcontractors. For example, the severe winter
weather which struck the eastern United States in January 1996 resulted in
significant installation delays for new customers and consequent delays in the
recognition of revenue from these new customers. In addition, in response to
competitive pressures, the Company could be forced to take certain pricing or
marketing actions that would have a material effect on the amount of revenues
in the short term. The Company's expense levels are relatively fixed in the
short term; as a result, variations in the timing and amounts of revenues
recognized could have a material adverse effect on the Company's quarterly
operating results.
   
MANAGEMENT'S DISCRETION AS TO USE OF UNALLOCATED NET PROCEEDS     
   
  The Company has not designated any specific use for a substantial portion of
the net proceeds from the sale of Common Stock described in this Prospectus.
The Company intends to use up to approximately $25.0 million of the net
proceeds to fund a portion of the costs of the expansion of the Company's
network infrastructure; however, to the extent that the Company is able to
arrange equipment financing on favorable terms, net proceeds that otherwise
would have been used to fund expansion of the Company's infrastructure will be
available for the other purposes described below. The Company intends to use
the balance of the net proceeds to fund anticipated operating losses, to
acquire business-focused regional ISPs or purchase their subscriber bases and
for general corporate purposes, but has not identified specific uses.
Consequently, the Board of Directors and management of the Company will have
significant flexibility in applying the net proceeds of the Offering. See "Use
of Proceeds."     
   
SHARES ELIGIBLE FOR FUTURE SALE; POTENTIAL ADVERSE EFFECT ON STOCK PRICE     
 
  Future sales of substantial amounts of the Company's Common Stock could
adversely affect the market price of the Common Stock. Several of the
Company's principal stockholders hold a significant portion of the Company's
outstanding Common Stock, and a decision by one or more of these stockholders
to sell their shares could adversely affect the market price of the Common
Stock. The
 
                                      14
<PAGE>
 
   
Shares offered hereby (plus any shares issued upon exercise of the
Underwriters' over-allotment option) will be freely tradeable without
restriction, except to the extent that such shares are purchased by
"affiliates" of the Company. The holders of Common Stock, and warrants to
purchase Common Stock, of the Company, including officers and directors of the
Company, have entered into contractual agreements with the Underwriters (the
"Lock-Up Agreements") providing that they will not offer, sell or contract to
sell, or otherwise dispose of, directly or indirectly, or announce an offering
of, any shares of Common Stock of the Company beneficially owned by them or
any securities convertible into, or exchangeable for, the Company's Common
Stock for a period of 180 days after the date of the Underwriting Agreement
without the prior written consent of the representatives of the Underwriters,
other than shares of stock disposed of as bona fide gifts. As a result,
notwithstanding possible earlier eligibility for sale under the provisions of
Rules 144 and 144(k) under the Securities Act of 1933, as amended (the "Act"),
shares subject to the Lock-Up Agreements will not be saleable until the Lock-
Up Agreements expire or their terms are waived by the Underwriters'
representatives. Assuming the Underwriters' representatives do not release
stockholders from the Lock-Up Agreements, the following shares will be
eligible for sale in the public market at the following times: beginning on
the effective date of the Registration Statement (the "Effective Date"), only
the shares sold in the Offering to non-affiliates will be immediately
available for sale in the public market; and beginning 180 days after the date
of the Underwriting Agreement, 1,617,907 shares will be eligible for sale
pursuant to Rule 144, all of which are held by affiliates of the Company. An
additional 4,548,744 shares will become eligible for sale pursuant to Rule 144
at various times during the two-year period following the Effective Date
(although such shares will continue to be subject to the Lock-Up Agreements
until the expiration of the terms thereof). The holders of approximately
4,266,660 shares of the Common Stock are entitled to certain rights with
respect to the registration of such shares under the Act beginning six months
after the Effective Date. In addition, the Company may register certain shares
of Common Stock issuable under the Stock Option Plans, and such registration
shall be effective upon filing with the Commission. As of June 30, 1996, there
were outstanding options under the Stock Option Plans to purchase 2,055,500
shares, of which options for 299,833 shares were fully vested and exercisable.
No shares have been issued to date under the Stock Option Plans. See "Shares
Eligible for Future Sale."     
 
CONTROL BY CERTAIN STOCKHOLDERS; ANTI-TAKEOVER MEASURES
   
  Following the Offering, the Company's executive officers, directors and
principal stockholders will beneficially own or control approximately 57.7% of
the outstanding shares of Common Stock, assuming exercise of vested options,
the Preferred Stock Conversion and the Warrant Exercise. As a result, these
stockholders will have the ability to control the election of the Company's
Board of Directors and the outcome of corporate actions requiring stockholder
approval. See "Principal Stockholders."     
   
  Certain provisions of the Company's Certificate of Incorporation and Bylaws
could make it more difficult for a third party to acquire, and could
discourage a third party from attempting to acquire, control of the Company.
Certain of these provisions allow the Company to issue Preferred Stock with
rights senior to those of the Common Stock without any further vote or action
by the stockholders, eliminate the right of stockholders to act by written
consent, provide for a classified board of directors and impose various
procedural and other requirements which could make it more difficult for
stockholders to effect certain corporate actions. The provisions of the
Company's Certificate of Incorporation which permit the Board of Directors to
authorize the issuance of one or more classes of Preferred Stock, as well as
certain other charter provisions and certain provisions of Delaware law, could
limit the price that certain investors might be willing to pay in the future
for shares of the Company's Common Stock and may have the effect of delaying
or preventing transactions involving a change in control of the Company,
including transactions in which stockholders might receive a substantial
premium for their shares over then-current market prices. The issuance of
Preferred Stock also could decrease the amount of earnings and assets
available for distribution to the holders of Common Stock or could adversely
affect the rights and powers, including voting rights, of     
 
                                      15
<PAGE>
 
   
the holders of the Common Stock. See "Description of Capital Stock--Common
Stock" "--Preferred Stock," and "--Delaware Law and Limitations on Change in
Control."     
 
ABSENCE OF PUBLIC MARKET; DETERMINATION OF PUBLIC OFFERING PRICE; POSSIBLE
VOLATILITY OF STOCK PRICE
 
  Prior to the Offering, there has been no public market for the Company's
Common Stock, and there can be no assurance that an active public market will
develop or be sustained after the Offering. The initial public offering price
will be determined by negotiations among the Company and the representatives
of the Underwriters. See "Underwriting" for a discussion of the factors to be
considered in determining the initial public offering price. The stock market
has from time to time experienced significant price and volume fluctuations
which have particularly affected the market prices of the stocks of ISPs and
other technology companies and which may be unrelated to the operating
performance of particular companies. Factors such as quarterly variations in
actual or anticipated operating results, changes in earnings estimated by
analysts, market conditions in the industry, announcements by competitors,
regulatory actions and general economic conditions may have a significant
effect on the market price of the Common Stock.
 
DILUTION
   
  Purchasers of the Common Stock offered hereby will suffer an immediate and
substantial dilution, in the amount of $8.24 per share, in the pro forma net
tangible book value per share of the Common Stock as of June 30, 1996, from
the initial public offering price. See "Dilution."     
 
                                      16
<PAGE>
 
                                USE OF PROCEEDS
   
  The net proceeds to the Company of the Offering, at an assumed offering
price of $13.00 per share, after deducting estimated underwriting discount and
expenses of the Offering payable by the Company, will be approximately $44.4
million (approximately $51.2 million if the Underwriters' over-allotment
option is exercised in full). The Company intends to use up to approximately
$25.0 million of the net proceeds to fund a portion of the costs of the
expansion of the Company's network infrastructure; however, to the extent that
the Company is able to arrange equipment financing on favorable terms, net
proceeds that otherwise would have been used to fund expansion of the
Company's infrastructure will be available for the other purposes described
below. The Company intends to use the balance of the net proceeds to fund
anticipated operating losses, to acquire business-focused regional ISPs or
purchase their subscriber bases and for general corporate purposes, but the
Company has no current specific plans, commitments or agreements with respect
to any of the preceding uses. Pending such uses, the net proceeds to the
Company will be invested in U.S. government securities and other short term,
investment grade, interest-bearing securities.     
 
                                   DILUTION
   
  The net tangible book value of the Company at June 30, 1996 (after giving
effect to the 1996 Venture Financing, the Warrant Exercise and the Preferred
Stock Conversion) was $2,578,601, or approximately $0.42 per share of Common
Stock. Net tangible book value per share is determined by dividing the
Company's tangible net worth (tangible assets less total liabilities) by the
number of shares of Common Stock outstanding. After giving effect to the sale
of 3,750,000 shares of Common Stock offered hereby and the receipt of the
estimated net proceeds therefrom (at the assumed public offering price of
$13.00 per share and after deducting estimated underwriting discount and
expenses of the Offering payable by the Company), the pro forma net tangible
book value of the Company at June 30, 1996 would have been $47.0 million, or
$4.76 per share. This represents an immediate dilution of $8.24 per share to
purchasers of Common Stock in the Offering. Dilution is determined by
subtracting the pro forma net tangible book value per share after the Offering
from the initial offering price per share. The following table illustrates
this per share dilution:     
 
<TABLE>   
<S>                                                                 <C>   <C>
Initial offering price per share..................................        $13.00
  Pro forma net tangible book value per share before the Offering.  $0.42
  Increase in net tangible book value per share attributable to
   new investors .................................................   4.34
                                                                    -----
Pro forma net tangible book value per share after the Offering....          4.76
                                                                          ------
Dilution per share to new investors...............................        $ 8.24
                                                                          ======
</TABLE>    
   
  The following table summarizes, as of June 30, 1996, on a pro forma basis
and after giving effect to the Offering, the number of shares of Common Stock
purchased from the Company, the total consideration paid to the Company and
the average price per share paid by the existing stockholders and by new
investors purchasing Common Stock in the Offering. Based on an assumed initial
public offering price of $13.00 per share before deducting estimated
underwriting discount and expenses of the Offering payable by the Company, the
number of shares of Common Stock purchased from the Company is 3,750,000, the
total consideration paid to the Company is $48,750,000, the average price per
share paid by the existing stockholders is $1.98 and the price per share paid
by new investors is $13.00.     
 
<TABLE>     
<CAPTION>
                              SHARES PURCHASED  TOTAL CONSIDERATION  AVERAGE
                              ----------------- -------------------   PRICE
                               NUMBER   PERCENT   AMOUNT    PERCENT PER SHARE
                              --------- ------- ----------- ------- ---------
   <S>                        <C>       <C>     <C>         <C>     <C>    
   Existing stockholders..... 6,113,991    62%  $12,126,391    20%  $ 1.98
   New investors............. 3,750,000    38%  $48,750,000    80%   13.00
                              ---------   ---   -----------   ---
     Total................... 9,863,991   100%  $60,876,391   100%
                              =========   ===   ===========   ===
</TABLE>    
 
                                      17
<PAGE>
 
                                CAPITALIZATION
   
  The following table sets forth, as of June 30, 1996, (i) the Company's
actual capitalization, (ii) the pro forma capitalization after giving effect
to the Preferred Stock Conversion and the Warrant Exercise, and (iii) the pro
forma capitalization, as adjusted for the issuance and sale by the Company of
the 3,750,000 shares of Common Stock offered hereby, after deducting estimated
underwriting discount and expenses of the Offering payable by the Company (at
the assumed public offering price of $13.00 per share). This table should be
read in conjunction with the Company's financial statements and the notes
thereto included elsewhere in this Prospectus.     
 
<TABLE>   
<CAPTION>
                                                     JUNE 30, 1996
                                          --------------------------------------
                                                                    PRO FORMA AS
                                            ACTUAL      PRO FORMA     ADJUSTED
                                          -----------  -----------  ------------
<S>                                       <C>          <C>          <C>
Current portion of capital lease obliga-
 tions..................................  $ 1,497,563  $ 1,497,563  $ 1,497,563
                                          -----------  -----------  -----------
    Total current indebtedness..........    1,497,563    1,497,563    1,497,563
                                          ===========  ===========  ===========
Capital lease obligations, less current
 portion................................    1,714,283    1,714,283    1,714,283
Series A mandatorily redeemable pre-
 ferred stock, $1.00 par value(1):
  Authorized shares--70,000 actual and
   pro forma; none pro forma as adjusted
  Issued and outstanding shares--45,455
   actual; none pro forma and pro forma
   as adjusted..........................    2,391,770          --           --
Series B mandatorily redeemable pre-
 ferred stock, $1.00 par value(1):
  Authorized shares--130,000 actual and
   pro forma; none pro forma as adjusted
  Issued and outstanding shares--81,264
   actual; none pro forma and pro forma
   as adjusted..........................    8,126,389          --           --
Shareholders' equity (deficit):
  Common stock, $.01 par value:
   Authorized shares--49,800,000 actual
   and pro forma; 47,000,000 pro forma
   as adjusted
   Issued and outstanding shares--
   1,617,907 actual;  6,113,991 pro
   forma; 9,863,991 pro forma as ad jus-
   ted(2)...............................       16,179       61,140       98,640
  Additional paid-in capital............    3,824,636   14,297,834   58,647,834
  Accumulated deficit...................  (11,780,373) (11,780,373) (11,780,373)
                                          -----------  -----------  -----------
    Total shareholders' equity (defi-
     cit)...............................   (7,939,558)   2,578,601   46,966,101
                                          -----------  -----------  -----------
      Total capitalization..............  $ 4,292,884  $ 4,292,884  $48,680,384
                                          ===========  ===========  ===========
</TABLE>    
- --------
   
(1) Preferred Stock is not presented in this table as a part of shareholders'
    equity of the Company because it is mandatorily redeemable at the option
    of the holders thereof. Each outstanding share of the Company's Preferred
    Stock will convert into shares of Common Stock upon the closing of this
    Offering and will be cancelled, retired and returned to the shares which
    the Company is authorized to issue. See "Description of Capital Stock" and
    Notes 8, 9 and 18 of Notes to Financial Statements.     
   
(2) Excludes 2,500,480 shares of Common Stock reserved for issuance to
    employees under the Stock Option Plans (of which options to purchase
    2,283,300 shares are outstanding as of July 19, 1996). See "Management--
    Incentive Stock Option Plans," "Shares Eligible for Future Sale" and Note
    13 of Notes to the Company's Financial Statements. Also excludes 240,000
    shares of Common Stock reserved for issuance to WinStar pursuant to the
    WinStar Warrants.     
 
                                      18
<PAGE>
 
                                DIVIDEND POLICY
   
  The Company does not currently pay dividends on its Common Stock and does
not anticipate paying dividends in the foreseeable future. It is the present
policy of the Company's Board of Directors to retain earnings, if any, to
finance the expansion of the Company's business. The payment of dividends in
the future will depend on the results of operations, financial condition,
capital expenditure plans and other cash obligations of the Company and will
be at the sole discretion of the Board of Directors. In addition, the
Company's line of credit with Silicon Valley Bank prohibits the Company from
declaring dividends while borrowings are outstanding, and provisions of future
financing arrangements of the Company may also prohibit or limit the Company's
ability to pay dividends. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations--Liquidity and Capital
Resources."     
 
                                      19
<PAGE>
 
                SELECTED FINANCIAL AND PRO FORMA FINANCIAL DATA
   
  The selected financial data for each of the three years in the period ended
December 31, 1995 and the six-month periods ended June 30, 1995 and June 30,
1996 have been derived from the Company's audited financial statements which
are included elsewhere in this Prospectus. The selected financial data should
be read in conjunction with and is qualified in its entirety by reference to
the financial statements of the Company and the related notes thereto and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" included elsewhere in this Prospectus.     
 
<TABLE>   
<CAPTION>
                                                                SIX MONTHS ENDED
                             YEARS ENDED DECEMBER 31,               JUNE 30,
                          ---------------------------------  ------------------------
                            1993       1994        1995         1995         1996
                          --------  ----------  -----------  -----------  -----------
<S>                       <C>       <C>         <C>          <C>          <C>
STATEMENT OF OPERATIONS
 DATA:
Revenue.................  $431,098  $1,577,609  $ 5,075,316  $ 1,665,432  $ 5,235,204
Costs and expenses:
  Cost of revenue.......   216,656   1,002,503    4,471,500    1,321,663    5,246,961
  Sales and marketing...    18,326     263,075    1,710,234      561,093    2,587,472
  General and adminis-
   trative..............   135,238     366,392    2,715,752      588,116    3,376,091
                          --------  ----------  -----------  -----------  -----------
Total expenses..........   370,220   1,631,970    8,897,486    2,470,872   11,210,524
                          --------  ----------  -----------  -----------  -----------
Income (loss) from oper-
 ations.................    60,878     (54,361)  (3,822,170)    (805,440)  (5,975,320)
Other income (expense):
  Interest and other in-
   come.................       --          --        72,002       17,453       47,746
  Interest expense......       --      (23,693)    (226,745)     (45,249)  (1,167,149)
                          --------  ----------  -----------  -----------  -----------
                               --      (23,693)    (154,743)     (27,796)  (1,119,403)
                          --------  ----------  -----------  -----------  -----------
Income (loss) before
 income taxes...........    60,878     (78,054)  (3,976,913)    (833,236)  (7,094,723)
Income taxes............   (25,540)     (3,470)         --           --           --
                          --------  ----------  -----------  -----------  -----------
Net income (loss).......    35,338     (81,524)  (3,976,913)    (833,236)  (7,094,723)
Accretion of Preferred
 Stock to redemption
 value..................       --          --      (338,698)    (109,163)    (252,881)
                          --------  ----------  -----------  -----------  -----------
Net income (loss)
 attributable to common
 shareholders...........  $ 35,338  $  (81,524) $(4,315,611) $  (942,399) $(7,347,604)
                          ========  ==========  ===========  ===========  ===========
Pro forma net income
 (loss) per common
 share(1)...............                        $     (0.47)              $     (0.69)
                                                ===========               ===========
Pro forma average common
 and common equivalent
 shares outstanding(1)..                          8,254,069                 8,689,950
                                                ===========               ===========
</TABLE>    
 
<TABLE>   
<CAPTION>
                                                          JUNE 30, 1996
                                                    ---------------------------
                                       DECEMBER 31,                PRO FORMA
                                           1995       ACTUAL    AS ADJUSTED (2)
                                       ------------ ----------  ---------------
<S>                                    <C>          <C>         <C>
BALANCE SHEET DATA:
Cash and cash equivalents.............  $  832,582  $6,269,000    $50,656,500
Working capital (deficit).............  (1,820,464) (6,018,179)    13,369,321
Total assets..........................   5,051,786  18,841,779     63,229,279
Total indebtedness, less current por-
 tion.................................     821,709   1,714,283      1,714,283
Mandatorily redeemable preferred
 stock................................   2,138,889  10,518,159            --
Total stockholders' equity (deficit)..  (1,527,742) (7,939,558)    46,966,101
</TABLE>    
 
- --------
   
(1) Pro forma net loss per common share adjusts historical earnings per share
    for the assumed conversion of convertible securities which are not
    included in the historical computations. These convertible securities will
    automatically convert into shares of Common Stock upon the consummation of
    the Offering. Historical net loss was reduced by $450,871 for the year
    ended December 31, 1995 and $1,311,347 for the six months ended June 30,
    1996 to adjust for interest expense and preferred stock accretion related
    to the convertible securities. See Note 2 to Financial Statements.      
   
(2) The pro forma as adjusted data give effect to (i) the Preferred Stock
    Conversion and the Warrant Exercise, both of which will occur upon
    consummation of the Offering and (ii) the issuance and sale by the Company
    of the shares of Common Stock offered hereby (at the assumed public
    offering price of $13.00 per share, after deducting estimated underwriting
    discount and expenses of the Offering payable by the Company).     
 
                                      20
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
OVERVIEW
 
  DIGEX is a leading national ISP that focuses exclusively on business
customers. The Company was founded in 1990 by a group of Internet pioneers as
a local provider of dial-up Internet connectivity. After receiving its first
major infusion of institutional equity capital in March 1995, the Company
reoriented its strategy to focus exclusively on business customers, who
generally require high bandwidth connectivity, and also began to develop its
Web server hosting business. The Company brought in an experienced management
team in the first quarter of 1996. In the second quarter of 1996, the Company
expanded its network to the west coast, enabling the Company to provide its
solutions to business customers nationwide.
 
  The Company derives its revenue from providing a comprehensive range of
INDUSTRIAL STRENGTH Internet solutions, including business connectivity, Web
server hosting, consulting and education services and security and other
network products. Business connectivity and Web server hosting customers are
typically signed to contracts with minimum terms of one year. Revenues
generated from these customers are typically in the form of recurring monthly
fees, installation and start-up charges and sales of related equipment,
applications and services.
   
  The Company has made significant investments in developing and expanding its
network infrastructure and its customer service and sales and marketing
efforts. The substantial costs incurred in connection with this expansion
contributed heavily to the Company's operating losses in 1995 and the six
months ended June 30, 1996. In anticipation of future growth, the Company
expects to continue to make significant investments in its network
infrastructure, currently anticipated to be $25.0 million and to be funded
either from the proceeds of this Offering or from equipment financing, to the
extent that the Company is able to arrange such financing on favorable terms,
throughout the remainder of 1996 and in 1997. The Company's leased line and
server customers have expanded from approximately 65 accounts at April 30,
1995 to approximately 840 accounts at June 30, 1996.     
 
  The Company's quarterly operating results have fluctuated and will continue
to fluctuate from period to period depending upon factors such as the timing
and installation of significant orders, the pricing and mix of services and
products sold by the Company, terminations of service, new product
introductions by the Company and its competitors, market acceptance of new and
enhanced versions of the Company's products and services, changes in pricing
policies by its competitors, the Company's ability to obtain sufficient
supplies of limited source components, the lengthening of the Company's sales
cycle and the timing of the expansion of the Company's network infrastructure.
   
  In view of the significant growth of the Company's operations, the Company
believes that period-to-period comparisons of its financial results should not
be relied upon as an indication of future performance and that the Company may
experience future period-to-period fluctuation in operating results. The
Company's short-term focus is on building and expanding its customer base,
which will require it to make significant investments in its network
infrastructure, personnel, marketing and the development of new products and
services, and which may adversely impact short-term operating results. The
Company expects to incur operating and net losses in 1996 and may continue to
incur operating and net losses thereafter. There can be no assurance that the
Company will achieve or sustain profitability in the future.     
 
RESULTS OF OPERATIONS
 
  The following table sets forth the percentage of the Company's revenue and
total expenses represented by certain line items from the Company's statement
of operations.
 
                                      21
<PAGE>
 
<TABLE>   
<CAPTION>
                                                 SIX MONTHS
                              YEARS ENDED           ENDED
                              DECEMBER 31,        JUNE 30,
                             -----------------   -------------
                             1993  1994   1995   1995    1996
                             ----  ----   ----   -----   -----
<S>                          <C>   <C>    <C>    <C>     <C>
Revenue..................... 100%  100%   100%    100%     100%
Costs and expenses:
  Cost of revenue...........  50    63     88      79      100
  Sales and marketing.......   4    17     34      34       49
  General and administra-
   tive.....................  32    23     53      35       65
                             ---   ---    ---    ----    -----
Total expenses..............  86   103    175     148      214
                             ---   ---    ---    ----    -----
Income (loss) from opera-
 tions......................  14    (3)   (75)    (48)    (114)
Interest expense, net....... --     (2)    (3)     (2)     (21)
                             ---   ---    ---    ----    -----
Income (loss) before income
 taxes......................  14    (5)   (78)    (50)    (135)
Income taxes ...............   6     0    --      --       --
                             ---   ---    ---    ----    -----
    Net income (loss).......   8%   (5)%  (78)%   (50)%   (135)%
                             ===   ===    ===    ====    =====
</TABLE>    
   
 SIX MONTHS ENDED JUNE 30, 1996 COMPARED WITH SIX MONTHS ENDED JUNE 30, 1995
    
REVENUE
   
  The Company derives its revenue from providing a comprehensive range of
INDUSTRIAL STRENGTH Internet solutions, including business connectivity, Web
server hosting, consulting and education services and security and other
network products. Revenue grew 214% from $1.7 million in the six months ended
June 30, 1995 to $5.2 million in the six months ended June 30, 1996, the
majority of which was due to the change in the Company's strategy to focus
exclusively on business customers, who generally require high bandwidth
connectivity, and the associated expansion of its sales and marketing efforts,
including the creation of a direct sales force, and to a lesser extent the
development of the Company's Web server hosting business.     
 
COST OF REVENUE
   
  Cost of revenue consists primarily of local access costs, network
infrastructure, leased network backbone circuit costs and network operations
and support costs. Network operations and support costs consist primarily of
personnel expenses relating to the operation of the network infrastructure,
including monitoring network traffic and quality, and costs of providing
technical support to customers. Cost of revenue increased 297% from $1.3
million in the six months ended June 30, 1995 to $5.2 million in the same
period in 1996. Cost of revenue increased as a percentage of revenues from 79%
in the 1995 period to 100% in the 1996 period. The increase in cost of revenue
was primarily due to costs associated with the Company's change in strategy to
focus exclusively on business customers. These costs include the hiring of
additional personnel to support the Company's expanding customer base and the
higher support requirements of business customers as well as the expansion of
the network backbone, the establishment of a 24x7x365 NOC, and the building of
redundant facilities. For example, the Company's customer support and network
operations personnel increased from 42 at June 30, 1995 to 69 at June 30,
1996. The Company plans to continue to expand its network through 1996 and
1997, which in turn will continue to increase cost of revenue. As the costs
associated with this expansion have been and will be incurred by the Company
in anticipation of growth in its customer base, the Company believes that,
over time, cost of revenue as a percentage of revenues will decline as its
customer base expands.     
 
SALES AND MARKETING
   
  Sales and marketing costs consist primarily of salaries and expenses of
sales and marketing personnel, advertising and promotion and marketing
materials. Sales and marketing costs rose 361%     
 
                                      22
<PAGE>
 
   
from $0.6 million in the six months ended June 30, 1995 to $2.6 million in the
same period in 1996. Sales and marketing costs increased as a percentage of
revenues from 34% in the 1995 period to 49% in the 1996 period. The increase
in sales and marketing costs was primarily due to the Company's change in
strategy to focus exclusively on business customers. The Company's prior
business strategy required minimal sales and marketing. The change in strategy
required the hiring of additional sales and marketing personnel (from 27 at
June 30, 1995 to 85 at June 30, 1996) and the expansion of advertising and
promotional activities and product development efforts. The Company expects to
continue to invest heavily in sales and marketing in 1996 and 1997.     
 
GENERAL AND ADMINISTRATIVE
   
  General and administrative costs consist primarily of expenses associated
with the Company's management, accounting, finance and administrative
functions. General and administrative costs increased 474% from $0.6 million
in the six months ended June 30, 1995 to $3.4 million in the same period in
1996. These costs increased as a percentage of revenues from 35% in the six
months ended June 30, 1995 to 65% in the same period in 1996. This increase in
general and administrative expenses was due primarily to the hiring of 28
additional senior management, finance, accounting and administrative personnel
to support the Company's expanding operations. The Company expects to hire
additional personnel in anticipation of continued expansion of its operations.
General and administrative costs were also affected by a $400,000 non-cash
compensation charge in the six months ended June 30, 1996 related to the grant
of stock options. In addition, based on options granted through June 30, 1996,
additional compensation charges of $3.8 million will be reported as general
and administrative costs during the period July 1, 1996 through December 31,
1999. See Note 13 to the financial statements for additional information with
respect to compensation expense related to stock option grants. The increase
in the general and administrative costs resulted principally from the increase
in the Company's general and administrative staff from 13 at June 30, 1995 to
41 at June 30, 1996. The Company expects to hire additional personnel in
anticipation of continued expansion of its operations.     
 
INTEREST EXPENSE
   
  Interest expense increased from $45,249 in the six months ended June 30,
1995 to $1,167,149 in the same period in 1996. The increase in interest
expense during the 1996 period was primarily due to the Company's issuance of
subordinated debentures in November 1995 and February 1996 and increased
equipment financing and capital lease obligations incurred to finance network
expansion and to fund working capital requirements.     
 
YEAR ENDED DECEMBER 31, 1995 COMPARED WITH YEAR ENDED DECEMBER 31, 1994
 
REVENUE
   
  Revenue grew 222% from $1.6 million in 1994 to $5.1 million in 1995, the
majority of which was due to the change in the Company's strategy to focus
exclusively on business customers, who generally require high bandwidth
connectivity, and to a lesser extent the development of the Company's Web
server hosting business. In addition, the equity financing in March 1995
contributed to this increase by allowing the Company to greatly expand its
customer acquisition effort by building a direct sales force. The Company's
leased line and server customers expanded from approximately 16 accounts at
December 31, 1994 to approximately 500 accounts at December 31, 1995.     
 
COST OF REVENUE
 
  Cost of revenue increased 346% from $1.0 million in 1994 to $4.5 million in
1995. Cost of revenue increased as a percentage of revenues from 63% in 1994
to 88% in 1995. The increase in cost of revenue was primarily due to costs
associated with the Company's change in strategy to focus exclusively on
business customers. These costs included the hiring of additional personnel to
support the Company's expanding customer base as well as the expansion of the
network backbone, the establishment of a 24x7x365 NOC, and the building of
redundant facilities. The Company's customer support and network operations
personnel increased from 21 at December 31, 1994 to 53 at
 
                                      23
<PAGE>
 
December 31, 1995. The increased use of the network and the increase in
capital expenditures to expand the network infrastructure created an increase
in depreciation and amortization expense during 1995.
 
SALES AND MARKETING
 
  Sales and marketing costs rose 550% from $0.3 million in 1994 to $1.7
million in 1995. Sales and marketing costs increased as a percentage of
revenues from 17% in 1994 to 34% in 1995. The increase in sales and marketing
costs was primarily due to the Company's change in strategy to focus
exclusively on business customers. The Company's prior business strategy
required minimal sales and marketing. The Company's change in focus required
the hiring of additional sales and marketing personnel (from 8 at December 31,
1994 to 36 at December 31, 1995), expanding advertising and promotional
activities and product development efforts. The Company expects to continue to
invest heavily in sales and marketing in 1996.
 
GENERAL AND ADMINISTRATIVE
   
  General and administrative costs increased 650% from $0.4 million in 1994 to
$2.7 million in 1995. These costs increased as a percentage of revenues from
23% in 1994 to 53% in 1995. This increase in general and administrative
expenses was due primarily to the hiring of 12 additional senior management,
finance, accounting and administrative personnel to support the Company's
expanding operations. The Company expects to hire additional personnel in
anticipation of continued expansion of its operations. General and
administrative costs were also affected by a $475,000 non-cash compensation
charge in 1995 related to the grant of stock options and a $310,000 write-off
of accounts receivable in 1995 compared to a $15,000 write-off during 1994.
See Note 13 to the financial statements for additional information with
respect to compensation expense related to stock options. The Company's
general and administrative staff increased from 5 at December 31, 1994 to 17
at December 31, 1995. The Company expects to hire additional personnel in
anticipation of continued expansion of its operation.     
 
INTEREST EXPENSE
 
  Interest expense increased from $24,000 in 1994 to $227,000 in 1995. The
increase in interest expense during 1995 was primarily due to interest of
$124,000 on $2.0 million of subordinated debentures and an increase in
equipment financing and capital lease obligations incurred to finance network
expansion and to fund working capital requirements.
 
YEAR ENDED DECEMBER 31, 1994 COMPARED WITH YEAR ENDED DECEMBER 31, 1993.
 
REVENUE
   
  Revenue grew 266% from $0.4 million in 1993 to $1.6 million in 1994, as a
result of increases in the number of the Company's customers due to the
commercialization of the Internet and significant growth in its usage. The
customer base in 1993 and 1994 was comprised primarily of individual dial-up
customers.     
 
COST OF REVENUE
   
  Cost of revenue increased 363% from $0.2 million in 1993 to $1.0 million in
1994. Cost of revenue increased as a percentage of revenues from 50% in 1993
to 63% in 1994. The increase in cost of revenue was primarily due to an
increase in the hiring of additional personnel to support the Company's
expanding customer base, relocation of the Company's headquarters to larger
facilities and the increase in capital expenditures to expand the network
infrastructure, which created an increase in depreciation and amortization
expense during 1994.     
 
SALES AND MARKETING
 
  Sales and marketing costs rose from $18,000 in 1993 to $263,000 in 1994.
Sales and marketing costs increased as a percentage of revenues from 4% in
1993 to 17% in 1994. The increase in sales
 
                                      24
<PAGE>
 
   
and marketing costs was due to expansion of the advertising and promotional
activities and the hiring of dedicated sales representatives.     
 
GENERAL AND ADMINISTRATIVE
 
  General and administrative costs increased 171% from $0.1 million in 1993 to
$0.4 million in 1994. These costs decreased as a percentage of revenues from
32% in 1993 to 23% in 1994. This increase in general and administrative costs
was due primarily to the hiring of additional management, finance, accounting
and administrative personnel to support the Company's expanding customer base.
 
INTEREST EXPENSE
 
  Interest expense was $24,000 in 1994. There was no interest expense in 1993.
The interest expense incurred during 1994 was primarily due to equipment
financing and capital lease obligations incurred to finance network expansion
and to fund working capital requirements.
 
INCOME TAXES
 
  Income tax expense decreased from $26,000 in 1993 to $3,000 in 1994 due to
the operating loss.
 
QUARTERLY RESULTS
 
  The following table sets forth unaudited quarterly revenue for the five
quarters ended March 31, 1996. In the opinion of management, the unaudited
information set forth below has been prepared in accordance with generally
accepted accounting principles for interim financial information and Item
310(b) of Regulation S-B.
 
<TABLE>   
<CAPTION>
                                            1995                            1996
                                     THREE MONTHS ENDED              THREE MONTHS ENDED
                         ------------------------------------------ ---------------------
                         MARCH 31 JUNE 30  SEPTEMBER 30 DECEMBER 31  MARCH 31   JUNE 30
                         -------- -------- ------------ ----------- ---------- ----------
<S>                      <C>      <C>      <C>          <C>         <C>        <C>
Revenue................. $739,700 $925,300  $1,318,200  $2,092,100  $2,232,500 $3,002,700
</TABLE>    
 
  The Company's quarterly results may in the future vary significantly
depending on a variety of factors. See "Risk Factors--Potential Fluctuations
in Quarterly Operating Results." In view of the significant historic growth of
the Company's operations, the Company believes that period-to-period
comparisons of revenue should not be relied upon to estimate future revenue.
 
LIQUIDITY AND CAPITAL RESOURCES
   
  The Company satisfied its cash requirements in 1995 and in the first six
months of 1996 principally through a combination of sales of equity and debt
securities to venture capital investors. The Company received $6.0 million in
1995 from the sale of equity and debt securities to venture capital investors.
In February 1996, the Company sold additional debt securities to venture
capital investors, together with warrants to purchase shares of Common Stock,
for gross proceeds of $1.0 million. Proceeds from these financings were used
to fund the rapid expansion of the Company's network infrastructure and
internal operations, including purchases of capital equipment and the hiring
of additional personnel. See "Certain Transactions."     
   
  In April 1996, to provide additional liquidity, the Company entered into a
Loan and Security Agreement with Silicon Valley Bank that provides a revolving
credit line secured by accounts receivable. The credit line allows the Company
to borrow a maximum amount equal to the lesser of $1.5 million or 80% of the
Company's eligible accounts receivable, at the rate announced from time to
time by Silicon Valley Bank as its "prime rate" plus 1% per annum, which was
9.25% at June 30, 1996. As of June 30, 1996, the Company had approximately
$445,000 of borrowings available, but no     
 
                                      25
<PAGE>
 
   
amounts outstanding, under such line of credit. Also in April 1996, the
Company obtained a commitment for an equipment lease line under which the
Company may lease equipment with a total cost of up to $2.0 million through
December 31, 1996. The lease terms will range from 42 months to 50 months and
will be accounted for as capital leases with annual effective interest rates
approximating 14% per annum. As of June 30, 1996, $200,000 of this commitment
remained unused and available. The Company's capital lease obligations as of
June 30, 1996 were $3.2 million and its future minimum lease payments through
2000 under certain operating leases were $2.0 million.     
 
  In May 1996, the Company entered into agreements with venture capital
investors pursuant to which the Company issued shares of Series B Preferred
Stock in exchange for total cash consideration of $5.0 million. Proceeds from
this transaction are being used to finance the Company's network
infrastructure expansion. See "Certain Transactions."
   
  In June 1996, the Company entered into a multi-year private network
agreement with WinStar. As part of the agreement, WinStar advanced $5.0
million in cash for connectivity services to be provided under such agreement
and received warrants to purchase 240,000 shares of Common Stock. The
estimated value of the WinStar Warrants, $228,000, was recorded as additional
paid-in capital and deferred revenue associated with such agreement was
recorded in the amount of $4,772,000. See Note 11 to the Financial Statements.
The Company's obligations to WinStar under such agreement are secured by
substantially all of the Company's assets, which security interest will
terminate by its terms upon the consummation of the Offering.     
   
  The Company generated positive cash flow from operating activities of
$124,000 in 1993 and $133,000 in 1994, compared to a negative cash flow from
operating activities of $2.5 million in 1995. The change in operating cash
flows from 1994 to 1995 was due primarily to increased costs relating to
expansion of the Company's network and organizational infrastructure,
including the hiring of additional management, marketing and sales, finance,
accounting and administrative personnel. In addition, purchases of fixed
assets increased from $98,000 in 1993, to $350,000 in 1994, and to $1.2
million in 1995, primarily to support the expansion of the Company's network
infrastructure.     
   
  The Company currently anticipates that funds advanced by WinStar under the
terms of its private network agreement, and the net proceeds of the 1996
Venture Financing and the Offering, together with existing financing
arrangements and funds from operations, will be sufficient to meet its
presently anticipated working capital, lease commitments and capital
expenditure requirements through the end of 1997. In order to enhance its
financing flexibility and liquidity, the Company is seeking to enter into
significant additional equipment financing arrangements; however, the company
to date has received no commitments for additional equipment financing, and
there can be no assurance that such commitments will be obtained in the future
on terms favorable for the company or at all. The Company may need to raise
additional funds through public or private debt or equity financings in order
to take advantage of unanticipated opportunities, including the acquisition of
business-focused regional ISPs or the purchase of their subscriber bases,
international expansion, acquisitions of complementary businesses or
technologies, development of new products or otherwise responding to
unanticipated competitive pressures. In addition, the Company may need to
raise additional funds in the event that the Company's estimates of operating
losses and capital requirements change or prove inaccurate. There can be no
assurance that the Company will be able to raise such capital on favorable
terms or at all. See "Risk Factors--Future Capital Needs; Uncertainty of
Additional Financing; Risks Associated With Current Financing Arrangements"
and "Use of Proceeds."     
 
 
                                      26
<PAGE>
 
                                   BUSINESS
   
  DIGEX is a leading independent national ISP that focuses exclusively on
businesses, government agencies and other institutional customers ("business
customers"). The Company offers a comprehensive range of INDUSTRIAL STRENGTH
Internet solutions, including business connectivity, Web server hosting,
consulting and education services and security and other network products.
After receiving its first major infusion of institutional equity capital in
March 1995, the Company reoriented its strategy to focus exclusively on
business customers, who generally require high bandwidth connectivity, and
also began to develop its Web server hosting business. Additionally, the
Company brought in an experienced management team in the first quarter of
1996. As a result, the Company's leased line and server customers have grown
from approximately 65 accounts at April 30, 1995 to approximately 840 accounts
at June 30, 1996.     
   
  The Company offers its INDUSTRIAL STRENGTH Internet solutions through four
separate and highly focused business units. The Business Connectivity Group
offers Internet connectivity solutions and other value-added solutions to
business customers, while the Telecommute Products Group focuses on the home-
office connectivity requirements of small businesses and high-end
professionals employed by companies that are served by the Business
Connectivity Group. The Internet Server Products Group provides Web server
hosting solutions enabling customers to deploy highly reliable Web servers
that are connected directly to the Internet backbone and are monitored on a
24x7x365 basis at the Company's network operations center ("NOC"). The Private
Networks Group seeks to create customized solutions for businesses looking to
provide private label Internet services without building their own facilities.
The Company recently entered into its first multi-year private network
agreements with LCI, WinStar and Orion. The Company expects that its ability
to attract additional private network customers will be significantly enhanced
by the announcement of these agreements.     
   
  In June 1996, the Company entered into an agreement with Microsoft, pursuant
to which Microsoft's Consulting Services Group will build a "Server Farm" for
the Company with servers running Microsoft's Windows NT operating system. The
Company plans to introduce a Windows NT hosted server product line in August
1996. The Company is currently engaged in discussions with Microsoft to
include DIGEX in Microsoft's Solution Provider Program, which will result in
the Company being designated a preferred vendor for Microsoft's corporate
customers. There can be no assurance that the Company will consummate this
agreement with Microsoft.     
 
INDUSTRY BACKGROUND
 
  The Internet is a global collection of computer networks that enables
businesses, government agencies, other institutional customers and individuals
to communicate, access and share information and conduct business remotely.
Use of the Internet has grown rapidly since the early 1990s, due in large part
to increasing personal computer and modem penetration, the development of the
World Wide Web, the introduction of easy-to-use navigational tools and
utilities for the Web and the availability of informational, entertainment and
commercial applications. Technological advances relating to the Internet have
occurred and continue to occur rapidly, resulting in a more robust, lower-cost
infrastructure, improved security and increased value-added services and
content. IDC has estimated that the number of Internet users will reach
approximately 200 million in 1999, from approximately 56 million in 1995.
 
  While there has been significant media interest in the use of the Internet
by consumers, business customers currently account for a more significant
percentage of Internet use. According to IDC, approximately 71%, or 40
million, of the approximately 56 million Internet users in 1995 were business-
related users. Internet capabilities, including corporate Internet sites, are
becoming an increasingly important part of doing business. According to
Netcraft, Ltd., the number of corporate Internet sites, defined as domain
names ending in ".com", has increased from 4,912 in August 1995 to 171,738 in
June 1996.
 
  Because Internet and corporate intranet solutions are increasingly achieving
"mission critical" status, business customers are demanding advanced, highly
reliable solutions designed specifically for
 
                                      27
<PAGE>
 
the needs of business. Furthermore, as the use of the Internet expands,
business customers are requiring that providers offer a comprehensive range of
services, including connectivity, Web server hosting, consulting, education
services and security and other networks products. Finally, business customers
often require knowledgeable and highly responsive sales and customer service
representatives in order to determine their optimal Internet strategy quickly
and to resolve any problems with their current solutions.
 
THE DIGEX SOLUTION
   
  The Company provides a comprehensive range of INDUSTRIAL STRENGTH Internet
solutions that serves the needs of business customers, who often desire a
responsive, single-source provider of reliable, high-performance Internet
connectivity and Web server hosting products and services.     
 
  Connectivity. DIGEX offers a complete product line of Internet connectivity
solutions to its business customers with a variety of service and pricing
programs based on bandwidth requirements. To complement its connectivity
offerings, the Company also sells customer-premise routers, firewall security
options and other value-added services such as education and training as well
as assigns and manages IP and E-mail addresses.
 
  Web Server Hosting. The Company also offers a complete range of Web server
hosting solutions. The Company's business customers are able to locate highly
reliable Web sites on dedicated servers at the Company's "Server Farm," which
enables users to gain high speed access to the Web server given the server's
direct connection to the Internet backbone. In addition, the Company provides
24x7x365 monitoring of the server and Internet connection by the Company's
highly experienced technical staff, as well as easy server upgradability as
the customer's speed and capacity requirements grow.
   
  The Company's Internet solutions are supported by its state-of-the-art
network infrastructure, including the Company's NOC and Server Farm located in
suburban Washington, D.C. The Company has built a redundant nationwide DS-3
backbone connecting to the three major Internet peering points at 45 Mbps and
has established peering relationships with other national ISPs, allowing DIGEX
to route its customers' traffic to the desired Internet address. The Company
believes that its combination of a nationwide network and peering
relationships significantly differentiates the Company from regional ISPs who,
without peering relationships, may have to pay retail rates to national
providers in order to exchange network traffic.     
 
THE DIGEX STRATEGY
 
  After receiving its first major infusion of institutional equity capital in
March 1995, the Company reoriented its strategy to focus on becoming the ISP
of choice for business customers. DIGEX's strategy focuses on five key
elements:
 
  Focus on Businesses Customers. The Company believes that business customers
offer the greatest potential market for the Company's solutions due to this
market's low customer turnover and need for the higher value-added Internet
solutions which the Company provides. By focusing on these customers, the
Company believes it will be able to develop innovative, specialized products
and services that address the constantly evolving needs of business customers
at competitive prices. In addition, the Company believes that its less-focused
competition will have difficulty fulfilling the demanding needs of these
customers.
 
  Provide Comprehensive Range of Internet Solutions. The Company provides a
comprehensive range of Internet solutions, enabling it to satisfy the needs of
business customers, who often seek a sole provider for all their Internet
requirements. The Company's sales forces for each of its business units are
incentivized to cross-market all of DIGEX's products and services.
 
  Expand and Optimize Its Nationwide Network. The Company aims to expand its
highly reliable, nationwide DS-3 network, which the Company has designed to
specifically address the growing
 
                                      28
<PAGE>
 
reliability and bandwidth requirements of business customers, so as to offer a
comprehensive range of connectivity solutions to such customers across the
United States. The Company believes that as it expands its network to more
cities, it can offer its solutions to additional business customers more cost-
effectively than its consumer-focused competitors, because fewer POPs are
required to reach business customers, who are largely concentrated in urban
centers. In addition, the Company attempts to optimize its network efficiency
by counterbalancing business connectivity, which makes greater use of the
Company's network during business hours, with Web server hosting, which makes
greater use of the network during non-business hours.
 
  Implement Multiple Distribution Channels. The Company aims to reach its
customers through the Company's own direct sales force as well as through
other innovative methods of distribution. These methods currently include
agent relationships with advertising agencies and Web site developers who
resell the Company's Web server hosting solutions and the efforts of the
Company's Private Networks Group, which enters into long-term agreements with
telecommunications service providers to resell the Company's connectivity
solutions under their own brand names.
   
  Focus on Customer Acquisition and Retention. In addition to acquiring
customers through its existing distribution channels, the Company believes
that as consolidation of the industry continues and it becomes more difficult
for regional ISPs to compete, the Company will be able to acquire
opportunistically business-focused regional ISPs or purchase their subscriber
bases. The Company also believes that customer responsiveness is becoming a
key ingredient of success for ISPs and has formed four focused business units
to better serve and retain customers. To aid in this effort, the Company has
developed a highly trained direct sales force with extensive Internet
expertise which, based on customer feedback, the Company believes
significantly differentiates the Company from its competitors.     
 
NETWORK INFRASTRUCTURE
   
  DIGEX's current network infrastructure is based upon a DS-3 ring around the
continental United States which provides two 45 Mbps paths between the east
and west coasts, allowing for a combined bandwidth of 90 Mbps when fully
operational. As shown on the map on the following page, customers can connect
to the Company's network from major cities across the United States. Clear
channel DS-3 circuits in the ring connect core routers in DIGEX POPs located
in cities on the ring. In the event of single points of failure, traffic can
be routed around the loop, providing for a minimum of 45 Mbps even in the
event of such a failure. Other network circuits connect routers in DIGEX POPs
in cities not located along the ring to nearby DIGEX routers residing on the
ring. The network backbone uses state-of-the-art routing platforms, including
Cisco Systems, Inc. ("Cisco") 7513 routers.     
 
  DIGEX customers are connected via high-speed leased lines, frame relay, SMDS
or other technologies to the local DIGEX POP, where data enters the DIGEX
backbone. If the destination of the data is on the DIGEX network, then the
data is delivered without ever leaving DIGEX's facilities. If the data is
destined for an Internet customer connected via another national ISP which has
a peering relationship with DIGEX, then the data is routed to the nearest
peering location where the data is passed from the DIGEX router to the router
of the other ISP, who then carries that traffic to the final destination. If
the destination is an ISP which does not have a peering relationship, then the
data is delivered to the national ISP from whom such ISP purchases its
Internet connectivity.
   
  Currently, DIGEX's comprehensive range of connectivity solutions are
available in 24 U.S. metropolitan areas through 30 POPs, and the Company
expects to make its connectivity solutions available in a total of 48 U.S.
metropolitan areas through 61 POPs by the end of 1996. DIGEX currently leases
the majority of its intercity backbone DS-3 circuits from MCI and Cable &
Wireless, as well as collocation space at their facilities for DIGEX
equipment. The Company has a five-year agreement with MCI as well as three-
year commitments from Cable & Wireless for the lease of such circuits and the
use of collocation space to house DIGEX equipment. Management believes that it
will be able to renew or replace such contracts at comparable rates. Other
DIGEX network segments and customer connections are provided through LECs and
CAPs.     
 
                                      29
<PAGE>
 
 DIGEX's POPs and Nationwide Network Backbone
 
[MAP OF UNITED STATES PLOTTING DIGEX'S CURRENT POPs, NEW POPs BY 12/31/96 AND
CLEAR CHANNEL DS-3 BACKBONE APPEARS HERE]


   
  DIGEX's network is monitored on a 24x7x365 basis by its NOC. Trouble calls
are serviced by the technical staff of either the Business Connectivity Group,
in the case of backbone or customer leased line difficulties, or the Internet
Server Products Group, in the case of problems with customer servers. MCI and
Cable & Wireless provide installation and maintenance services to assist DIGEX
at all locations where the Company collocates equipment. For equipment for its
remote POPs, DIGEX purchases routers from Cisco, CSU/DSUs from Digital Link
Corporation, IDSUs and DSUs from Kentrox Industries Inc. and modems and ISDN
from Ascend Communications Inc. Protected AC or DC power is used at all sites
to protect against power outages affecting the network.     
 
  In addition to these backbone facilities, DIGEX presently operates a Server
Farm at its suburban Washington, D.C. headquarters and intends to construct an
additional Server Farm and a back-up NOC on the west coast by the end of 1996.
The Company may decide to build additional Server Farms in the future to better
serve customer needs. Multiple Server Farms allow Internet users to access the
server closest to them and thus provide a better level of service, and would
allow DIGEX to minimize the amount of server-related traffic which it must
carry long distances over its network. Geographic distribution of customer data
also provides for redundancy in case of hardware, software or network failure,
contributing to increased uptime and service reliability.
 
PRODUCTS AND SERVICES
 
  The Company offers its INDUSTRIAL STRENGTH Internet solutions through four
separate and highly focused business units.
 
                                       30
<PAGE>
 
 Business Connectivity Group
   
  DIGEX provides complete connectivity solutions to its business customers,
including frame relay, leased lines and SMDS, with availability limited only
by the capabilities of the in-market LECs. See""--Network Infrastructure." The
majority of the revenue generated by the Business Connectivity Group is
derived from its frame relay and leased line products. The Company offers
several configurations and monthly pricing plans, each based on the bandwidth
supplied and thus on the speed and capacity of the facility. The retail
pricing of Business Connectivity products ranges from $400 per month to
$34,000 per month, and customers are strongly encouraged to enter into long-
term contracts. The Company's products are highly scalable and are designed to
facilitate ease of upgrade as the customer's needs evolve. The following chart
describes the Company's Business Connectivity options:     
 
 
<TABLE>
<CAPTION>
                SERVICE TYPE                        SUMMARY DESCRIPTION
  ----------------------------------------- -----------------------------------
  <C>                                       <S>
  Frame Relay                               Flat rate, scalable 32 Kbps to 1.54
                                            Mbps connectivity solutions based
                                            on frame relay technology for small
                                            to medium size business customers,
                                            running all standard Internet
                                            applications.
  Leased Line                               A complete range (56 Kbps to 45
                                            Mbps) of dedicated, clear channel
                                            circuits for local-area/wide-area
                                            networks and enterprises running
                                            all standard and high-bandwidth
                                            Internet applications.
  Ethernet Plus                             2 Mbps to 16 Mbps connectivity
                                            solutions for small to large
                                            business customers; provides an
                                            easy "plug and play" solution for
                                            Ethernet-based networks running all
                                            Internet applications.
  Switched Multimegabit Data Service (SMDS) A wide range of scalable solutions
                                            (1.17 Mbps to 34 Mbps); designed
                                            for metropolitan-central business
                                            customers seeking a cost-effective
                                            way to support all Internet
                                            applications.
</TABLE>
   
  In addition to basic connectivity service, DIGEX sells and configures
customer-premise routers, firewall security options and other value-added
services. DIGEX is an authorized reseller of the Eagle firewall product family
from Raptor Systems, Inc., and Firewall-1 from Check Point Software
Technologies Ltd. The Company also offers Secure Computing Corporation's
Sidewinder Internet firewall software. In addition, the Company helps
customers with initial use of their particular DIGEX solution and offers
training and education for its customers to become sophisticated Internet
users. The Company began providing business connectivity solutions in 1994 and
plans to introduce new products on a controlled basis, to ensure that the
quality of delivery, from both a sales and a support perspective, is in place,
thus solidifying the Company's reputation and building on its promise for
delivering INDUSTRIAL STRENGTH Internet solutions.     
 
 Internet Server Products Group
   
  The Company has offered a complete range of Web server hosting solutions
since 1994. The Company's business customers are able to locate highly
reliable Web sites on dedicated servers at the Company's "Server Farm," which
enables users to gain high speed access to the Web server given the server's
direct connection to the Internet backbone. In addition, the Company provides
24x7x365 monitoring of the server and Internet connection by the Company's
highly experienced technical staff as well as easy server upgradability as the
customer's speed and capacity requirements     
 
                                      31
<PAGE>
 
   
grow. As Web server needs evolve, DIGEX's goal is to continue to meet the
market with the most advanced server solutions available. DIGEX offers the
following Web server products under the DIGEX WEBenefit Series brand, of which
the IntroWeb and WebPlus products account for the majority of the revenues
generated by the Internet Server Products Group:     
 
  IntroWeb. To serve entry-level business customers using their Web sites to
display general information, the Company offers the IntroWeb product line. The
IntroWeb product line includes a dedicated server running on either a UNIX or
a Windows NT platform.
 
  WebPlus. To serve business customers using their Web sites both to display
general information and to establish a greater level of interactivity with
their customers, the Company offers the WebPlus product line. The WebPlus
product line includes dedicated-server products with greater processing power
and memory than those included in the IntroWeb product line.
 
  WebPreferred. To serve business customers using their Web sites to conduct
more sophisticated marketing and customer service efforts, such as displaying
company-specific information and interacting with customers as well as
transacting sales with customers who are attracted to their Web sites by
broader-based media advertising, the Company offers the WebPreferred product
line. The WebPreferred product line includes Netscape's Web Commerce server
software to help ensure that customers are able to effect business
transactions securely.
 
  WebPremier. To serve the most advanced business customers using their Web
sites as a core sales, marketing or customer support tool or primary
distribution vehicle for their products, the Company offers the WebPremier
product line. Within the WebPremier product line, the Company also allows
customers to collocate a specialized, customer-owned server at DIGEX's
facilities.
 
 Private Networks Group
 
  The Private Networks Group creates customized solutions for
telecommunications service providers looking to offer highly reliable private
label Internet connectivity solutions without incurring the lead time and
costs associated with building their own facilities. In turn, these providers
absorb customer-acquisition costs that would otherwise be borne by the
Company. When an individual contract is secured, a customized implementation
and service organization will be created to provide a premium level of support
for the private network customer. The Company expects that the operations of
the private network customer and the DIGEX support team will be integrated to
enhance customer support.
   
  The Company began offering private network solutions in 1996 and recently
entered into multi-year private network agreements with LCI, WinStar, Orion
and World Reservation Systems, Inc. The Private Network Group seeks to enter
into multi-year agreements having either take-or-pay commitments or bulk
discounts based on the aggregate amount of Internet solutions purchased. The
Company's private network agreement with LCI provides for a large-scale,
multi-year commitment by LCI to purchase Internet products and services from
DIGEX. Similarly, under WinStar's private network agreement with the Company,
Winstar will purchase during the next six years a minimum of $5.0 million of
Internet connectivity solutions with the right to purchase additional amounts,
in each case on a discounted basis. DIGEX's agreement with Orion provides for
bulk discounts over a 36-month period based on the aggregate amount of
Internet services purchased, while World Reservation Systems, Inc.'s private
network agreement with the Company includes a $1.3 million take-or-pay
commitment to purchase telecommute connectivity solutions.     
 
 Telecommute Products Group
   
  The Telecommute Products Group began offering its solutions in 1990 and
offers a variety of high-end, dial-up options to business professionals,
telecommuters and small businesses. The group's products range from lower-
cost, limited-access capability products to premium-priced, high-speed, low-
    
                                      32
<PAGE>
 
   
latency products. This group focuses on two distinct customer groups: (i)
professionals who require reliable at-home Internet connectivity and whose
usage is frequently paid for as part of an integrated, total-solution
connectivity package procured on a large scale by their employers and (ii)
small businesses that are likely to broaden and upgrade their solutions,
eventually becoming Business Connectivity Group and Internet Server Products
Group customers. The Company has entered into an agreement with Hughes Network
Systems, Inc. ("HNS") to distribute HNS's DirecPC product. The DirecPC product
uses a satellite link as a local loop solution to provide high-speed
connectivity between a customer and a DIGEX POP. The Company believes that the
Telecommute Products Group complements the Business Connectivity Group by
providing high-end solutions to professionals employed by Business
Connectivity customers.     
 
CUSTOMERS
   
  The Company's leased line and server customers have expanded to
approximately 840 accounts at June 30, 1996. In 1995, no customer accounted
for more than five percent of the Company's total revenues. In addition to its
leased line and server customers, the Company had approximately 5,000 dial-up
customers at June 30, 1996. The following are lists of selected DIGEX
customers each of which DIGEX billed monthly service fees in excess of $500
for Business Connectivity solutions or in excess of $350 for Internet Server
products in June 1996.     
<TABLE>     
<S>                                       <C>  
BUSINESS CONNECTIVITY                     INTERNET SERVERS
 
 
ALCOA                                     AMTRAK Campmor, Inc.
                                          CIGNA Corp.
COMSAT Corporation 
Credit Suisse                             Federal Reserve Bank of Richmond
Disclosure, Inc.                          Grand Heritage Hotel Company
                                          Maryland Dept. of Agriculture
Lucent Technologies Inc.                  Graduate School
Merrill Lynch & Co., Inc.
National Basketball Association           National Association of Investors
Oracle Corporation                        Orbit Questal Inc. Philadelphia
                                          Federal Credit Union
Piper & Marbury, LLP 

PointCast, Inc.                           PointCast, Inc. 
University of Maryland                    Roy F. Weston Inc.

U.S. Dept. of Commerce/NOAA               TeeVee Toons, Inc. 
Westinghouse Electric Corp.

Wheat First Butcher Singer, Inc. 
The World Bank
</TABLE>      
 
SALES AND MARKETING
    
  As of June 30, 1996, the Company employed 85 people in sales and marketing.
To date, the Company has sold its Internet solutions primarily through its
direct telephone sales force. Call activity is generated both by "cold
calling" and in response to customer referrals, E-mail correspondence through
the Company's Web site and a variety of promotional programs, including
advertising in general business and specialty periodicals, participation in
industry trade shows and press relations. In addition, the Company engages in
local promotional programs to support newly opened service locations. In order
to better serve the needs of its customers, the Company has developed a
specialized marketing approach for each business unit.     
 
  The sales force for the Company's Business Connectivity Group continues to
grow to meet the demands of customers along DIGEX's growing nationwide
network. The Company plans to add sales representatives who will focus on the
cities where the Company is opening new POPs along the network and to support
them with marketing programs to generate quality sales leads. In addition, the
Company plans to purchase prequalified sales leads, to solicit customers
through direct mail advertising, to conduct sales seminars, to advertise in
national trade publications and to participate in
 
                                      33
<PAGE>
 
industry trade shows. The Company believes that active marketing and lead
generation efforts will allow the sales force to become even more productive
and efficient.
 
  In addition to using the Business Connectivity Group's sales force for
marketing its products and services, the Internet Server Products Group is
creating a network of agents around the country to sell its products. DIGEX is
currently entering into agent agreements with organizations in select cities
nationwide, such as advertising agencies, graphic design firms and development
companies whose primary business is the creation of Web sites. In addition,
DIGEX intends to deploy regional account executives to support these
organizations and to develop and maintain relationships with targeted end
users.
 
  The Private Networks Group has a dedicated business development team which
targets a number of types of potential customers, including IXCs, LECs, cable
operators, large private network providers, and CAPs. The Company seeks to
enter into long-term, non-exclusive arrangements with these potential
resellers.
 
  The Telecommute Products Group sells its services through the Company's
direct sales force, through private network providers and through direct
marketing to the group's target markets. The Company's targeted businesses
include telecommuters who may purchase connectivity through a customer of the
Business Connectivity Group and small or home office users who are likely to
upgrade their services in the future.
 
COMPETITION
   
  The market for all types of Internet connectivity services is extremely
competitive. There are no substantial barriers to entry, and the Company
expects that competition will intensify in the future. As a result of an
increase in the number of competitors, and vertical and horizontal integration
in the industry, the Company expects to encounter significant pricing pressure
and other competition in the future. Advances in technology as well as changes
in the marketplace and the regulatory environment are constantly occurring,
and the Company cannot predict the effect that ongoing or future developments
may have on the Internet industry generally or on the Company specifically.
See "Risk Factors--Competition," "--Dependence Upon Product Development; Risks
of Changing Technology and Industry Standards" and "--Potential Liability for
Information Disseminated Over Network; Regulation."     
 
 Connectivity
 
  ISPs. Currently, the Company's primary competitors are other ISPs focused on
business customers including UUNET, BBN and PSI. UUNET, BBN and PSI in
particular have significantly greater market presence and financial,
technological and personnel resources than the Company and have extensive
coast-to-coast Internet backbones.
 
  A number of these competitors, however, including UUNET and PSI, have chosen
to pursue individual connectivity customers in an effort to balance the use of
their networks, since business customers tend to use the Internet during
business hours, while individual customers tend to use the Internet after
business hours. As a result, these ISPs have been forced to build out their
networks beyond what would be necessary to serve business customers. DIGEX, on
the other hand, has found that it can maintain its focus on business customers
and build a network infrastructure that can serve a substantial majority of
the business marketplace with significantly fewer POPs than its competitors.
In addition, the Company's Web server hosting business, while offering
additional Internet solutions to its business customers, generates a
substantial portion of its traffic after business hours, and thus balances the
usage of the Company's network. Thus, given its more focused business strategy
and more efficient use of capital, DIGEX can offer a comprehensive range of
business Internet solutions on a cost-effective basis.
 
                                      34
<PAGE>
 
  To a lesser extent, the Company competes with other national and regional
ISPs, of which there are currently over 1500. Many of these competitors,
however, including NETCOM, do not share DIGEX's business focus. In addition,
due to the substantial increase in the amount of data traffic carried by the
networks of certain national ISPs, the Company expects the industry's current
practice regarding peering to evolve by the end of 1996 to require an ISP to
possess (i) a coast-to-coast DS-3 backbone, (ii) 45 Mbps connections to three
U.S. peering points and (iii) a 24x7x365 NOC in order to qualify for peering
with the major national ISPs. The Company expects ISPs which do not satisfy
these requirements by the end of 1996 either to be acquired by the large
national ISPs or to be forced to become resellers of Internet connectivity
services, purchasing their network bandwidth at retail rates from national
ISPs.
 
  Telecommunications Companies. The Company currently competes with AT&T, MCI
and Sprint. In addition, a number of regulatory obstacles to the entry of
other telecommunications companies into the Internet connectivity market are
being removed. Accordingly, the Company expects competition to increase with
other major telecommunications companies, including MFS and the RBOCs. In
addition, deregulation of the telecommunications industry has already led to
significant horizontal integration through acquisitions and joint ventures,
and the Company expects these trends to continue.
   
  The telecommunications companies the Company competes with have access to
significantly greater financial, technological and personnel resources than
the Company and large existing commercial customer bases. In addition, IXCs,
including AT&T, MCI and Sprint, possess existing nationwide telecommunications
networks and generally face lower network infrastructure costs in providing
Internet connectivity than the Company. Although its WorldNet offering targets
the consumer market, AT&T is party to an agreement with BBN pursuant to which
it can market BBN's business connectivity services to AT&T's commercial
customer base or, in the alternative, provide its own Internet connectivity.
While these telecommunications companies have little experience with TCP/IP
networking in general, and Internet connectivity in particular, they now may
employ their larger sales organizations to sell Internet connectivity to their
existing telephony customers, both commercial and consumer. However, the
Company believes that its sales and marketing personnel, which have
backgrounds in data-oriented services, particularly TCP/IP will be able to
sell Internet connectivity more effectively than the sales forces of most
telecommunications companies, which possess backgrounds largely in voice-
oriented services.     
 
  LECs, such as the RBOCs, and CAPs, such as MFS, on the other hand, do not
currently possess nationwide networks. In order to address the Internet
connectivity requirements of their current business customer bases, these
companies must either buy connectivity to an Internet network infrastructure
or build such a network. For example, MFS has announced that it has agreed to
acquire UUNET to offer expanded Internet connectivity along with its
traditional telecommunications services. The Company seeks to capitalize on
the market opportunity created by telecommunications companies that have
chosen to buy, not build, Internet connectivity for resale through its Private
Networks Group, which sells DIGEX's Internet connectivity services to
telecommunications companies to be remarketed under their own brands.
   
  Cable Television and Direct Broadcast Satellite. Certain companies are
exploring the possibility of providing high-speed data services using
alternative delivery methods. For example, @Home, a joint venture between
Tele-Communications, Inc. and Kleiner Perkins Caufield & Byers, has stated its
intent to provide high-speed data services over cable television plant, and
HNS has lauched DirecPC, which will deliver high-speed data through direct
broadcast satellite technology. CAI Wireless Systems, Inc., a wireless cable
television service, also has announced that it has begun testing the first
Internet connectivity product delivered by wireless cable. However, since they
do not currently possess nationwide networks, these companies, in order to
provide Internet access, must either buy access to an Internet network
infrastructure or build such a network.     
 
 
                                      35
<PAGE>
 
   
  On-Line Service Providers. The Company also competes, to a lesser extent,
with certain on-line service providers who offer Internet connectivity in
conjunction with their primary products or services. For example, Microsoft
provides connectivity to the Internet through the Microsoft Network, which was
built by UUNET (in which Microsoft holds a significant minority stake), as a
standard integrated feature of its Windows 95 operating system, and IBM's OS/2
WARP operating system is preconfigured to provide Internet connectivity
through the Advantis network, which is controlled by IBM. In addition, AOL,
CompuServe and Prodigy currently provide connectivity to the Internet, and
many have announced plans to offer expanded Internet connectivity
capabilities. Currently, on-line service providers are primarily focused on
the consumer marketplace.     
 
 Web Server Hosting
 
  The market for Web server hosting is highly fragmented and extremely
competitive. There are no substantial barriers to entry and the Company expects
the competition will intensify in the future. Currently, the Company's primary
competitors are other ISPs, including BBN, UUNET and PSINet, and companies whose
primary business is developing and operating "Server Farms" such as Internet
Direct. In addition, many organizations currently host Web servers at their own
facilities. The Company believes, however, that as bandwidth requirements
increase, it will become more economical for these organizations to outsource
their needs. The Company believes that it significantly differentiates itself
from its competitors by offering flat-rate billing, dedicated servers, 24x7x365
monitoring, upgradability and other value-added services demanded by high-end
business customers.
       
PROPERTIES
   
  The Company's administrative offices, as well as its NOC and Server Farm,
are located in Beltsville, Maryland, where the Company currently leases
approximately 73,000 square feet under leases that expire in 1998 and 2000.
The Company believes that this facility will meet its needs through at least
the remainder of 1996. The Company intends to lease space on the west coast of
the United States to house its second Server Farm, which the Company expects
to construct in 1996. The Company also leases space (typically less than 200
square feet) in various geographic locations to house the telecommunications
equipment for each of its POPs. See "Network Infrastructure" for a description
of the components of the Company's nationwide network, the Company's NOC and
the current Server Farm.     
 
EMPLOYEES
   
  As of June 30, 1996, the Company employed 195 persons full-time, including
85 in sales and marketing, 69 in network operations (including 8 in technical
support) and 41 in general and administrative functions. None of the Company's
employees is represented by a labor union, and the Company considers its
employee relations to be good.     
 
LEGAL PROCEEDINGS
 
  The Company is not involved in any material legal proceedings.
 
                                      36
<PAGE>
 
                                  MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
   
  The Company's executive officers, directors and other key employees, and
their ages as of June 1, 1996, are as follows:     
 
<TABLE>     
<CAPTION>
   NAME                           AGE                POSITION
   ----                           ---                --------
   <S>                            <C> <C>
   Christopher R. McCleary(1)      43 Chairman of the Board, President,
                                       Chief Executive Officer
   Clyde A. Heintzelman            57 Senior Vice President, Chief Operating
                                       Officer, General Manager--Business
                                       Connectivity Group
   Thomas M. Brandt, Jr.           44 Senior Vice President, Chief Financial
                                       Officer, Secretary
   Earl P. Galleher                36 Vice President, General Manager--
                                       Internet Server Products Group
   Nicholas J. Magliato            30 Vice President, General Manager--
                                       Private Networks Group
   Brian M. Deobald                34 Vice President, General Manager--
                                       Telecommute Products Group
   William A. Pendley              32 Vice President, Assistant General
                                       Manager--Business Connectivity Group
   John C. Welling                 31 Vice President, Controller
   Douglas E. Humphrey             36 Senior Vice President, Chief
                                       Technology Officer, Director
   Sheryl R. Richeson              40 Vice President, Customer Service--
                                       Business Connectivity Group
   Edward J. Kern                  27 Vice President, Network--Business
                                       Connectivity Group
   William F. Webb, Jr.            30 Vice President, Internet Server
                                       Technical Operations
   Michael T. Doughney             37 Vice President, Director
   Frank A. Adams(1)(2)            50 Director
   Thomas H. Cato(3)               53 Director
   William F. Earthman III(1)(2)   44 Director
   Ray A. Rothrock(1)(3)           41 Director
   Robert M. Stewart(2)            41 Director
   John H. Wyant(3)                50 Director
</TABLE>    
- --------
   
(1) Member of the Executive Committee.     
   
(2) Member of the Compensation Committee.     
   
(3) Member of the Audit Committee.     
 
                                      37
<PAGE>
 
   
  Christopher R. McCleary joined DIGEX as President and Chief Executive
Officer in February 1996. Mr. McCleary has served as a director since joining
the Company and was elected Chairman of the Board of Directors in June 1996,
succeeding Frank A. Adams, who remains a director. Mr. McCleary was one of the
founding management team members at American Mobile Satellite Corporation
("AMSC"), where he served as a Vice President and General Manager, Satellite
Telephone Service from 1990 until joining DIGEX in 1996. Prior to joining
AMSC, Mr. McCleary was founder and President of the Satellite Network Antenna
Division of Radiation Systems, Inc. Mr. McCleary received his Bachelor's
degree from the University of Kentucky.     
   
  Clyde A. Heintzelman has served as Senior Vice President and Chief Operating
Officer since May 1995. From 1992 to 1994, Mr. Heintzelman was Vice President
of Sales and Marketing for Connective Strategies, Inc. ("CSI"), an ISDN
startup company. Mr. Heintzelman spent 28 years with Bell Atlantic prior to
joining CSI, serving as General Manager of Marketing and Sales for Bell
Atlantic Directory Services from 1990 until 1992 and as Vice President of
Sales and Marketing for the Business Market at C&P Telephone from 1985 to
1990. Mr. Heintzelman was President and CEO of Bell Atlanticom from 1983 to
1985 and, prior to that, was the general manager who established Bell
Atlantic's Federal Systems Division. Mr. Heintzelman received his Bachelor's
degree from the University of Delaware and has also done graduate work at the
Wharton School, the University of Pittsburgh and the University of Michigan.
       
  Thomas M. Brandt, Jr. joined DIGEX as Senior Vice President and Chief
Financial Officer in June 1996. Mr. Brandt was named Secretary in late June
1996. Mr. Brandt was a director at Price Waterhouse LLP from 1993 until he
joined DIGEX. From 1987 through 1992, Mr. Brandt served as Vice President and
Chief Financial Officer for U.S. Metalsource Corporation, a metals
distribution business. Mr. Brandt received his M.B.A. degree from the Wharton
School of the University of Pennsylvania and his Bachelor's degree from Duke
University.     
   
  Earl P. Galleher joined DIGEX as Vice President and General Manager--
Internet Server Products in March 1996. Prior to joining DIGEX, Mr. Galleher
was Director of Marketing at AMSC, which he joined in November 1991. Mr.
Galleher led the development of AMSC's product positioning, branding strategy
and subscriber acquisition investment plan. Prior to AMSC, Mr. Galleher was
Manager of Market Development at Southwestern Bell Mobile Systems Washington-
Baltimore system, which he joined in April 1990. Mr. Galleher received his
Bachelor of Arts degree from Denison University.     
   
  Nicholas J. Magliato joined DIGEX as Vice President and General Manager--
Private Networks in March 1996. Prior to joining DIGEX, Mr. Magliato was the
Director of Land Mobile Sales and Distribution at AMSC, which he joined in
April 1993. His responsibilities at AMSC included creating product plans for
wireless voice and data services and developing and implementing a nationwide
sales and distribution strategy. Prior to AMSC, Mr. Magliato was a
telecommunications consulting manager at Andersen Consulting LLP, which he
joined in August 1987. Mr. Magliato received a Bachelor's degree,
concentrating in Computer and Information Services, from Syracuse University.
       
  Brian M. Deobald joined DIGEX as Vice President and General Manager--
Telecommute Products in March 1996. Prior to joining DIGEX, Mr. Deobald was
the Director of Product Management at AMSC, which he joined in November 1991.
At AMSC, Mr. Deobald created the company's business plan and developed and
introduced services, subscriber hardware, and pricing. Mr. Deobald joined AMSC
from AT&T International Communications Services where he managed strategic and
business planning since July 1989. Mr. Deobald received an M.B.A. from the
Wharton School and holds a Master's degree from Johns Hopkins University and a
Bachelor's degree from Georgetown University.     
 
  William A. Pendley joined DIGEX in December 1994 as Chief Financial Officer
and currently serves as Vice President and Assistant General Manager--Business
Connectivity. In 1995, Mr. Pendley was responsible for developing DIGEX's
financial business plan and securing the first-level
 
                                      38
<PAGE>
 
   
financing with venture capital investors. Prior to joining DIGEX, Mr. Pendley
was Chief Financial Officer for Intrafed, Inc., a software developer and
system integrator, from 1994 and prior to that, served in a financial
management position for IBM Federal Systems from 1989. Mr. Pendley holds an
M.B.A. in finance from New York University and a Bachelor's degree from
Georgetown University.     
   
  John C. Welling joined DIGEX as a Vice President and Controller in April
1996. Prior to joining DIGEX, Mr. Welling was a senior manager at KPMG Peat
Marwick LLP, focusing on publicly-held companies, from 1987 until 1996. Mr.
Welling received a Bachelor's degree, with a concentration in accounting, from
Loyola College in Baltimore, Maryland.     
   
  Douglas E. Humphrey is the Senior Vice President, Chief Technology Officer
and co-founder of DIGEX. Mr. Humphrey has also served as a director of the
Company since 1990 and served as the Chief Executive Officer from the
Company's inception until Mr. McCleary joined DIGEX in February 1996. Mr.
Humphrey was a senior TCP/IP networking and computer security specialist for
Tandem Computers, Inc. from September 1987 to March 1993. From 1983 to 1987,
Mr. Humphrey was President and CEO of Computer Time Share Corporation. Mr.
Humphrey attended the University of Maryland at College Park.     
   
  Sheryl R. Richeson is Vice President, Customer Service--Business
Connectivity. Ms. Richeson joined DIGEX as Director of Customer Service in
October 1995. Ms. Richeson is an experienced telecommunications executive with
more than 14 years of management experience with Bell Atlantic, which she
joined in 1981. Ms. Richeson served as Director of Large Business Services and
as regional manager for Field Sales Support for Bell Atlantic. Ms. Richeson
holds a Master's degree from Johns Hopkins University and a Bachelor of
Science degree from the University of Colorado.     
   
  Edward J. Kern joined DIGEX in 1992 as Manager of Systems and was promoted
to Vice President, Network--Business Connectivity in May 1996. Prior to
joining DIGEX, Mr. Kern spent seven years building and managing TCP/IP
networks as a consultant for various companies. Mr. Kern is an active member
of the Internet Engineering Task Force.     
   
  William F. Webb, Jr. joined DIGEX as Vice President, Internet Server
Technical Operations in May 1996. Prior to joining DIGEX, Mr. Webb was a
manager at Andersen Consulting LLP beginning in June 1990. At Andersen
Consulting, Mr. Webb worked in the Telecommunications Industry Market Unit,
focusing on service activation systems for major telecommunications clients.
Mr. Webb holds an M.B.A. degree from Virginia Polytechnic Institute and State
University and a Bachelor of Science degree in Computer Science and
Mathematics from Eastern Nazarene College.     
 
  Michael T. Doughney is a Vice President and co-founder of DIGEX and has
served as a director of the Company since 1990. Mr. Doughney majored in
computer science and electrical engineering at the University of Maryland.
   
  Frank A. Adams has been a director of the Company since April 1995. Mr.
Adams served as Chairman of the Board from April 1995 until June 1996, when
Mr. McCleary was elected Chairman. Mr. Adams is currently President and CEO of
Grotech Capital Group which he co-founded in 1984. Mr. Adams has held
positions with public companies, including PHH Corporation, RLC/Matlack and
Westinghouse. Mr. Adams is also a director of several private companies. Mr.
Adams received his Bachelor's and Juris Doctor degrees from the University of
Baltimore and has completed advanced management programs at Stanford
University and Harvard University.     
   
  Thomas H. Cato joined DIGEX in July 1996 as a director. Mr. Cato is a
business consultant in information systems and health care. Prior to founding
his consulting business in June 1995, Mr. Cato served as president of
Columbia/HCA Information Services and Senior Vice President/CIO of
Columbia/HCA since 1985. Mr. Cato, a retired colonel from the United States
Air Force, received his B.B.A. from Tulane University.     
 
                                      39
<PAGE>
 
   
  William F. Earthman III has been a director of the Company since April 1995.
Mr. Earthman is a general partner of Southern Venture Fund II, L.P. and a
Partner of Massey Burch Capital Corporation. Before joining Massey Burch
Capital Corporation as Vice President in 1989, he served at the firms of J.C.
Bradford & Co., Prudential-Bache Securities and, most recently, First
Nashville Corporation. Mr. Earthman is also a director of Ensys Environmental
Products Inc. Mr. Earthman received his Bachelor's degree from the University
of Virginia.     
   
  Ray A. Rothrock has been a director of the Company since April 1995. Mr.
Rothrock is a general partner of Venrock Associates and Venrock Associates II,
L.P. and has been with the firm since 1988. Mr. Rothrock was with Sun
Microsystems Inc. for four years prior to joining Venrock. Mr. Rothrock
received his M.B.A. degree from Harvard Business School, an MS in Nuclear
Engineering from Massachusetts Institute of Technology, and a Bachelor of
Science in Nuclear Engineering from Texas A&M University. He serves as a
director of Spyglass, Inc. and Check Point Software Technologies, Ltd. of Tel
Aviv, Israel and several private companies.     
   
  Robert M. Stewart has been a director of the Company since December 1995.
Mr. Stewart has been a Managing Director of the Anchor Financial Group LLC
since November 1995, a private investment banking firm in Washington, D.C.
Prior to joining Anchor Financial Group, Mr. Stewart was a Principal with
Armata Partners L.P. from April 1993 and, prior to that, a Vice President of
Legg Mason Wood Walker, Inc., which he joined in February 1989. Mr. Stewart
holds an M.B.A. from the Babcock Graduate School of Management of Wake Forest
University and a B.A. from Hampden-Sydney College.     
   
  John H. Wyant began serving as a director of the Company in June 1996. Mr.
Wyant is the president of Blue Chip Venture Company, which he founded in 1990.
Mr. Wyant is also a director of Zaring Homes Inc. and several private
companies. Mr. Wyant received his B.A. degree from Denison University and his
J.D. degree from Chase College of Law.     
 
  Each officer serves at the discretion of the Board of Directors. There are
no family relationships among any of the Directors and executive officers of
the Company.
 
COMMITTEES OF THE BOARD OF DIRECTORS
   
  The Board of Directors has established an Executive Committee, an Audit
Committee and a Compensation Committee.     
   
  The Executive Committee consists of Mr. Adams (Chairman), Mr. Earthman, Mr.
McCleary and Mr. Rothrock. The Executive Committee reviews, evaluates and
makes decisions and recommendations with respect to specific matters delegated
to the Executive Committee by the Board of Directors.     
   
  The Audit Committee consists of Mr. Rothrock (Chairman), Mr. Wyant and Mr.
Cato. The Audit Committee makes recommendations to the Board of Directors
regarding the selection of independent auditors, reviews the results and scope
of the audit and other services provided by the Company's independent
auditors, and reviews and evaluates the Company's audit and control functions.
       
  The Compensation Committee consists of Mr. Earthman (Chairman), Mr. Adams
and Mr. Stewart. The Compensation Committee administers the Company's Stock
Option Plans and makes decisions concerning salaries and incentive
compensation for employees and consultants of the Company.     
 
DIRECTORS' COMPENSATION
 
  Non-employee directors are reimbursed for reasonable expenses incurred by
them in attending Board meetings. Pursuant to the terms of the Securities
Purchase Agreement by and among the
 
                                      40
<PAGE>
 
   
Company, Mr. Humphrey, Mr. Doughney, Grotech Capital Partners IV, L.P.
("Grotech IV"), Venrock Associates ("Venrock"), and Southern Venture Fund II,
L.P. ("Southern"), dated as of March 24, 1995 (the "Securities Purchase
Agreement"), the Company pays to each of Grotech IV, Venrock and Southern an
annual directors fee of $10,000 for the respective directors designated by
such entities. Under that certain Purchase and Exchange Agreement (as
defined), the Company also pays Blue Chip an annual directors fee of $10,000
for the director designated by such entity. Upon consummation of the Offering,
the non-employee directors shall cease to be entitled to receive such fees but
shall continue to receive reimbursement for reasonable expenses incurred in
their capacity as directors. In addition, non-employee directors are eligible
for the grant of stock options under the Company's Equity Plan. Each director
that is not an employee of the Company has been granted options to purchase
8,000 shares of Common Stock. In addition, each non-employee director will be
granted options to purchase 8,000 shares of Common Stock at each annual
meeting at which such director is re-elected as a director. See "--Equity
Plan."     
 
BOARD COMPOSITION
          
  In connection with the reincorporation of the Company as a Delaware
corporation, the Company will amend and restate its Certificate of
Incorporation and Bylaws. The Certificate of Incorporation and Bylaws of the
Corporation will provide that the Directors of the Corporation are divided
into three classes. A class of Directors will be elected by plurality vote,
with no cumulative voting, at each annual meeting of stockholders. Messrs.
Adams, Humphrey and McCleary will be designated Class I directors and will
serve until the meeting of stockholders in 1997. Messrs. Doughney, Stewart and
Wyant have been designated Class II directors and will serve until the meeting
of stockholders in 1998. Messrs. Cato, Earthman and Rothrock will be
designated Class III directors and will serve until the meeting of
stockholders in 1999. Thereafter, each Class of Directors will have a term of
three years, with a term of one class expiring each year.     
   
  Under the Securities Purchase, Conversion and Exchange Agreement (the
"Purchase and Exchange Agreement"), dated as of May 30, 1996, by and among the
Company, Grotech IV, Grotech Partners III, L.P. ("Grotech Partners"), Grotech
III Companion Fund, L.P. ("Grotech Companion"), Grotech III Pennsylvania Fund,
L.P. ("Grotech Pennsylvania"), Venrock, Venrock Associates II, L.P. ("Venrock
II"), Southern, Blue Chip Capital Fund Limited Partnership ("Blue Chip"),
Crisler Capital Company, Limited Partnership ("Crisler," and together with
Grotech IV, Grotech Partners, Grotech Companion, Grotech Pennsylvania,
Venrock, Venrock II, Southern, and Blue Chip, the "1996 Venture Investors"),
Mr. Humphrey and Mr. Doughney, the 1996 Venture Investors and Messrs. Humphrey
and Doughney have agreed to vote their shares of voting stock of the Company
for the election of: (i) four directors designated by Messrs. Humphrey and
Doughney (Mr. Humphrey, Mr. Doughney, Mr. Stewart and Mr. McCleary), (ii) one
director designated by Grotech IV (Mr. Adams), (iii) one director designated
by Venrock (Mr. Rothrock), (iv) one director designated by Southern (Mr.
Earthman), (v) one director designated by Blue Chip (Mr. Wyant) and (vi) one
director to be jointly designated by the 1996 Venture Investors and Mr.
Humphrey (Mr. Cato). This agreement superseded provisions of the Securities
Purchase Agreement concerning the election of directors. The provisions of the
Purchase and Exchange Agreement concerning election of directors terminate
effective immediately prior to consummation of the Offering. Accordingly, no
stockholder shall be obligated to vote in favor of election of any person
nominated for election of the Board of Directors by any other stockholder
following consummation of the Offering.     
 
                                      41
<PAGE>
 
EXECUTIVE COMPENSATION
 
  The following table summarizes all compensation earned by Douglas E.
Humphrey (the "Named Executive Officer"), who served as the Company's Chief
Executive Officer during the fiscal year ended December 31, 1995. No other
executive officers of the Company earned in excess of $100,000 of salary and
bonus during the fiscal year ended December 31, 1995.
 
<TABLE>
<CAPTION>
                                                          LONG-TERM
                                 ANNUAL COMPENSATION  COMPENSATION AWARD
                                 -------------------- ------------------
                                                          SECURITIES
NAME AND                                                  UNDERLYING      ALL OTHER
PRINCIPAL                 FISCAL    SALARY     BONUS       OPTIONS       COMPENSATION
POSITION                   YEAR      ($)        ($)          (#)            ($)(2)
- ---------                 ------ ---------- --------- ------------------ ------------
<S>                       <C>    <C>        <C>       <C>                <C>
Douglas E. Humphrey(1)..   1995  $  100,000 $  20,000          0            $6,600
 Chief Executive Officer
</TABLE>
- --------
(1) Mr. Humphrey was Chief Executive Officer of the Company until February
    1996, when Mr. McCleary succeeded him. Mr. Humphrey is currently a Senior
    Vice President and Chief Technology Officer of the Company.
(2) This amount represents a car allowance.
 
OPTION GRANTS IN 1995
   
  No options were granted for the fiscal year ended December 31, 1995 to the
Named Executive Officer and no stock appreciation rights have been granted to
date. In addition, the Named Executive Officer currently holds no options for
the Company's Common Stock and did not exercise any options during the fiscal
year ended December 31, 1995.     
   
INCENTIVE STOCK OPTION PLAN     
   
  1995 Stock Option Plan. The Board of Directors has adopted an Incentive
Stock Option Plan (the "1995 Stock Option Plan"). Under the 1995 Stock Option
Plan, employees are entitled to purchase Common Stock of the Company by cash
payment or by delivery of existing shares of Common Stock held by such
employee. The purpose of the 1995 Stock Option Plan and of granting options to
specified employees of the Company pursuant thereto is to further the growth,
development and financial success of the Company by providing additional
incentives to such persons by assisting them to acquire shares of Common Stock
of the Company and to benefit directly from the Company's growth, development
and financial success. Options granted under the 1995 Stock Option Plan vest
in accordance with one of the following schedules or in accordance with an
alternative schedule approved by the Board of Directors: (i) 25% of the
aggregate amount of options granted to a particular employee upon the first
anniversary of the date of hire of such employee and the remaining 75% of the
aggregate amount of options on a quarterly basis, evenly spread out over the
three-year period following the first anniversary of the date of hire or (ii)
33% of the aggregate amount of options granted to a particular employee upon
the first anniversary of the date of hire of such employee and the remaining
67% of the aggregate amount of options on a quarterly basis, evenly spread out
over the two-year period following the first anniversary of the date of hire.
Options granted under the 1995 Stock Option Plan expire on the tenth
anniversary of the date of grant. The Company has reserved 1,099,054 shares of
Common Stock for issuance under the 1995 Stock Option Plan, none of which have
been issued to date. As of July 19, 1996, options for the purchase of
1,099,054 shares of Common Stock are outstanding under the 1995 Stock Option
Plan. The exercise price for all of such outstanding options is $0.25 per
share. No new options will be granted under the 1995 Stock Option Plan.     
       
EQUITY PLAN
   
  The Company adopted the DIGEX, Incorporated 1996 Equity Participation Plan
(the "Equity Plan") effective as of May 31, 1996. The principal purposes of
the Equity Plan are to provide incentives for officers, employees and
consultants of the Company through granting of options, restricted stock and
    
                                      42
<PAGE>
 
   
other awards ("Awards"), thereby stimulating their personal and active interest
in the Company's development and financial success, and inducing them to remain
in the Company's employ. In addition to Awards made to officers, employees or
consultants, the Equity Plan provides for the granting of options ("Director
Options") to the Company's independent non-employee directors pursuant to a
formula, as described in further detail below.     
          
  Under the Equity Plan, not more than 1,401,426 shares of Common Stock (or the
equivalent in other equity securities) are authorized for issuance upon
exercise of options, stock appreciation rights ("SARs") and other Awards, or
upon vesting of restricted or deferred stock Awards; provided however, that
Awards with respect to additional shares may be granted to the extent that
options expire or are otherwise terminated unexercised under the 1995 Stock
Option Plan. In the aggregate, no more than 2,500,480 shares may be outstanding
under the 1995 Stock Option Plan and the Equity Plan. As of the date hereof,
1,136,246 nonqualified stock options to purchase Common Stock have been granted
to employees under the Equity Plan and 1,136,246 are outstanding and Director
Options to purchase 48,000 shares of Common Stock have been granted to non-
employee directors under the Equity Plan. No other Awards have been made under
the Equity Plan. The exercise price for all such outstanding options ranges
from $3.73 to $10.00 per share.     
   
  The shares available under the Equity Plan upon exercise of stock options,
SARs and other Awards, and for issuance as restricted or deferred stock Awards,
may be either previously unissued shares or treasury shares, and may be equity
securities of the Company other than Common Stock. The Committee (the Board
with respect to Director Options) has the discretion to make appropriate
adjustments in the number and kind of securities subject to the Equity Plan and
to outstanding Awards thereunder to reflect dividends or other distributions; a
recapitalization, reclassification, stock split, reverse stock split, or
reorganization, merger or consolidation of the Company; the split-up, spin-off,
combination, liquidation or dissolution of the Company; or disposition of all
or substantially all of the assets of the Company or exchange of Common Stock
or other securities of the Company; or other similar corporate transaction or
event.     
   
  If any portion of a stock option, SAR or other Award terminates or lapses
unexercised, or is cancelled upon grant of a new option, SAR or other Award
(which may be at a higher or lower exercise price than the option, SAR or other
Award so cancelled), the shares which were subject to the unexercised portion
of such option, SAR or other Award, will continue to be available for issuance
under the Equity Plan.     
   
  The principal features of the Equity Plan are summarized below, but the
summary is qualified in its entirety by reference to the Equity Plan itself.
       
 Administration     
   
  Prior to the Offering, the Board of Directors of the Company (the "Board")
will administer the Equity Plan; following the closing of the Offering, the
Compensation Committee of the Board or a subcommittee thereof (the
"Compensation Committee") will administer the Equity Plan with respect to
awards and the full Board will administer the Equity Plan with respect to
Director Options. The Compensation Committee will consist of at least two
members of the Board, neither of whom is an employee of the Company and if the
Board so determines, each of whom will be a "non-employee director" for
purposes of Rule 16b-3 under the Securities Exchange Act of 1934, as amended
("Rule 16b-3"). Subject to the terms and conditions of the Equity Plan, the
Compensation Committee has the authority to select the persons to whom Awards
are to be made, to determine the number of shares to be subject thereto and the
terms and conditions thereof, and to make all other determinations and to take
all other actions necessary or advisable for the administration of the Equity
Plan. Similarly, the Board has discretion to determine the terms and conditions
of grants of Director Options and to interpret and administer the Equity Plan
with respect to Director Options, consistent with the specific formula terms
described in more detail below. The Committee (and the Board) are also
authorized to adopt, amend and rescind rules relating to the administration of
the Equity Plan.     
 
                                       43
<PAGE>
 
   
 Amendment and Termination     
   
  Amendments of the Equity Plan to increase the number of shares as to which
Awards may be made (except for adjustments resulting from stock splits and the
like, and mergers, consolidations and other corporate transactions) require
the approval of the Company's stockholders. In all other respects the Equity
Plan can be amended, modified, suspended or terminated by the Committee or the
Board, unless such action would otherwise require stockholder approval as a
matter of applicable law, regulation or rule. Amendments of the Equity Plan
will not, without the consent of the participant, affect such person's rights
under an Award previously awarded, unless the Award Agreement governing such
Award itself otherwise expressly so provides. Unless sooner terminated by the
Board or the Compensation Committee, the Equity Plan will expire on May 31,
2006. Such termination will not affect the validity of any Award outstanding
under the Equity Plan on the date of termination.     
   
 Eligibility     
   
  Options, SARs, restricted stock and other Awards under the Equity Plan may
be granted to individuals who are then officers or other employees of the
Company or any of its present or future subsidiaries. Such Awards also may be
granted to consultants of the Company selected by the Compensation Committee
for participation in the Equity Plan. Approximately 195 employees are eligible
to be granted Awards under the Equity Plan. More than one option, SAR,
restricted stock Award or other Award may be granted to an employee or
consultant, but the aggregate fair market value (determined at the time of
grant) of shares with respect to which an Incentive Stock Option is first
exercisable by an optionee (i.e. "vests") during any calendar year cannot
exceed $100,000. Non-employee directors may only be granted Director Options.
       
 Payment for Shares     
   
  The exercise or purchase price for all options, Director Options, SARs,
restricted stock and other Awards that provide a right to acquire Common
Stock, together with any applicable tax required to be withheld, must be paid
in full in cash at the time of exercise or purchase or may, with the approval
of the Compensation Committee (or Board for Director Options) be paid in whole
or in part in Common Stock valued at their fair market value on the date of
exercise (which may, except with respect to incentive stock options, include
an assignment of the right to receive the cash proceeds from the sale of
Common Stock subject to an option or other right pursuant to a "cashless
exercise" procedure) or by delivery of other property, or by a recourse
promissory note payable to the Company, or by a combination of the foregoing.
       
 Awards under the Equity Plan     
   
  The Equity Plan provides that the Committee may grant or issue stock
options, SARs, restricted stock, deferred stock, dividend equivalents,
performance awards, stock payments and other stock related benefits, or any
combination thereof. Each Award will be set forth in a separate agreement with
the person receiving the Award and will indicate the type, terms and
conditions of the Award.     
   
  Nonqualified Stock Options ("NQSOs") will provide for the right to purchase
Common Stock at a specified price which, except with respect to NQSOs intended
to qualify as performance-based compensation under Section 162(m) of the Code,
may be less than fair market value on the date of grant (but not less than par
value), and usually will become exercisable (in the discretion of the
Compensation Committee) in one or more installments after the grant date,
subject to the participant's continued employment with the Company and/or
subject to the satisfaction of individual or Company performance targets
established by the Compensation Committee. NQSOs may be granted for any term
specified by the Compensation Committee.     
   
  Incentive Stock Options ("ISOs") will be designed to comply with the
provisions of the Internal Revenue Code of 1986, as amended (the "Code"), and
will be subject to certain restrictions contained     
 
                                      44
<PAGE>
 
   
in the Code. Among such restrictions, ISOs must have an exercise price not less
than the fair market value of a share of Common Stock on the date of grant, may
only be granted to employees, must expire within a specified period of time
following the Optionee's termination of employment, and must be exercised
within the ten years after the date of grant; but may be subsequently modified
to disqualify them from treatment as ISOs. In the case of an ISO granted to an
individual who owns (or is deemed to own) at least 10% of the total combined
voting power of all classes of stock of the Company, the Equity Plan provides
that the exercise price must be at least 110% of the fair market value of a
share of Common Stock on the date of grant and the ISO must expire upon the
fifth anniversary of the date of its grant.     
   
  Restricted Stock may be sold to participants at various prices (but not below
par value) and made subject to such restrictions as may be determined by the
Compensation Committee. Restricted stock, typically, may be repurchased by the
Company at the original purchase price if the conditions or restrictions are
not met. In general, restricted stock may not be sold, or otherwise transferred
or hypothecated, until restrictions are removed or expire. Purchasers of
restricted stock, unlike recipients of options, will have voting rights and
will receive dividends prior to the time when the restrictions lapse.     
   
  Deferred Stock may be awarded to participants, typically without payment of
consideration, but subject to vesting conditions based on continued employment
or on performance criteria established by the Committee. Like restricted stock,
deferred stock may not be sold, or otherwise transferred or hypothecated, until
vesting conditions are removed or expire. Unlike restricted stock, deferred
stock will not be issued until the deferred stock award has vested, and
recipients of deferred stock generally will have no voting or dividend rights
prior to the time when vesting conditions are satisfied.     
   
  SARs may be granted in connection with stock options or other Awards, or
separately. SARs granted by the Committee in connection with stock options or
other awards typically will provide for payments to the holder based upon
increases in the price of the Common Stock over the exercise price of the
related option or other Awards, but alternatively may be based upon criteria
such as book value. Except as required by Section 162(m) of the Code with
respect to an SAR intended to qualify as performance-based compensation as
described in Section 162(m)(4)(C) of the Code, there are no restrictions
specified in the Equity Plan on the exercise of SARs or the amount of gain
realizable therefrom, although restrictions may be imposed by the Committee in
the SAR agreements. The Compensation Committee may elect to pay SARs in cash or
in Common Stock or in a combination of both.     
   
  Dividend Equivalents represent the value of the dividends per share paid by
the Company, calculated with reference to the number of shares covered by the
stock options, SARs or other Awards held by the participant.     
   
  Performance Awards may be granted by the Compensation Committee on an
individual or group basis. Generally, these Awards will be based upon specific
performance targets and may be paid in cash or in Common Stock or in a
combination of both. Performance Awards may include "phantom" stock Awards that
provide for payments based upon increases in the price of the Common Stock over
a predetermined period. Performance Awards may also include bonuses which may
be granted by the Compensation Committee on an individual or group basis and
which may be payable in cash or in Common Stock or in a combination of both.
       
  Stock Payments may be authorized by the Compensation Committee in the form of
shares of Common Stock or an option or other right to purchase Common Stock as
part of a deferred compensation arrangement in lieu of all or any part of
compensation, including bonuses, that would otherwise be payable in cash to the
employee or consultant.     
 
 
                                       45
<PAGE>
 
   
 Director Options     
   
  Director Options are NQSOs granted to non-employee directors of the Company
pursuant to a formula. Under the formula in the Equity Plan, following the
closing of the Offering, when a director is initially elected to the Board and
is at that time a non-employee director, he or she automatically shall be
granted an NQSO to purchase 8,000 shares of Common Stock. During the term of
the Plan, each then current non-employee director shall automatically be
granted an NQSO to purchase 8,000 shares of Common Stock at each subsequent
annual meeting at which he or she is reelected to the Board. Members of the
Board who are employees who subsequently terminate employment with the Company
and remain on the Board will not receive an initial NQSO grant as a non-
employee director, but, to the extent they are otherwise eligible, will
receive NQSOs as described in the preceding sentence after such termination of
employment. The exercise price of the Director Options shall be the fair
market value of a share of Common Stock on the date of grant. Each Director
Option shall become exercisable in cumulative annual installments of one-third
on each of the first, second and third annual meeting of shareholders that are
subsequent to the date of grant and at which directors are elected, subject to
the Director's continued service as a Director; provided, however, to the
extent permitted by Rule 16b-3, the Board may accelerate the exercisability of
Director Options upon the occurrence of certain specified extraordinary
corporate transactions or events and provided further, that in any event, upon
the occurrence of a "Change in Control" of the Company (as defined in the
Equity Plan) all outstanding Director Options shall become immediately
exercisable. No portion of a Director Option shall be exercisable after the
tenth anniversary of the date of grant and no portion of a Director Option
shall be exercisable upon the expiration of one year following the Director's
termination of services as a director of the Company.     
   
 Miscellaneous Provisions     
   
  The Compensation Committee (or Board with respect to Director Options) has
discretion under the Equity Plan to provide that options and other rights to
acquire Common Stock will expire at specified times following, or become
exercisable in full upon, the occurrence of certain specified "extraordinary
corporate events;" but in such event the Compensation Committee may also give
optionees and other grantees the right to exercise their outstanding options
or rights in full during some period prior to such event, even though the
options or other Awards have not yet become fully exercisable, and the
Compensation Committee may also provide that all restrictions imposed on some
or all shares of restricted stock and/or deferred stock shall lapse, and some
or all shares of restricted stock may cease to be subject to the Company's
right to repurchase after such event.     
   
  The Equity Plan specifies that the Company may make loans to participants to
enable them to exercise options, purchase shares or realize the benefits of
other Awards granted under the Equity Plan. The terms and conditions of such
loans, if any are made, are to be set by the Compensation Committee (or the
Board with respect to Director Options).     
   
  The dates on which options or other Awards under the Equity Plan first
become exercisable and on which they expire will be set forth in individual
Award agreements setting forth the terms of the Awards. Such agreements
generally will provide that options and other Awards expire upon termination
of the participant's status as an employee, consultant or Director, although
the Compensation Committee may provide that options or other Awards granted to
employees or consultants continue to be exercisable following a termination
without Cause (as defined in the Equity Plan), or following a Change in
Control of the Company (as defined in the Equity Plan), or because of the
grantee's retirement, death, disability or otherwise. Similarly, restricted
stock granted under the Equity Plan which has not vested generally will be
subject to repurchase by the Company in the event of the grantee's termination
of employment or consultancy, although the Compensation Committee may make
exceptions, based on the reason for termination or on other factors.     
 
 
                                      46
<PAGE>
 
   
  No option, SAR, Director Option or other Award granted under the Equity Plan
may be assigned or transferred by the grantee, except by will or the laws of
descent and distributions, although the shares underlying such Awards may be
transferred if all applicable restrictions have lapsed. During the lifetime of
the holder of any option or right, the option or right may be exercised only
by the holder.     
   
  As a condition to the issuance or delivery of stock or payment of other
compensation pursuant to the exercise or lapse of restrictions of any option
or other Award granted under the Equity Plan, the Company requires
participants to discharge applicable withholding tax obligations. Shares held
by or to be issued to a participant may also be used to discharge tax
withholding obligations related to exercise of options or receipt of other
Awards, subject to the discretion of the Compensation Committee to disapprove
such use. In addition, the Compensation Committee may grant to employees a
cash bonus in the amount of any tax related to awards.     
   
  In May and June of 1996, the Company granted NQSOs. The value of options
granted under the Equity Plan depends on the future market value of a share of
Common Stock on the date of exercise and such value is not presently
determinable.     
   
CERTAIN FEDERAL INCOME TAX CONSEQUENCES WITH RESPECT TO THE EQUITY PLAN     
   
  The tax consequences of the Equity Plan under current federal law are
summarized in the following discussion which deals with the general tax
principles applicable to the Equity Plan, and is intended for general
information only. Alternative minimum tax and state and local income taxes are
not discussed. Tax laws are complex and subject to change and may vary
depending on individual circumstances and from locality to locality. The tax
information summarized is not tax advice.     
   
  Nonqualified Stock Options. For federal income tax purposes, an optionee
generally will not recognize taxable income on the grant of an NQSO under the
Equity Plan, but will recognize ordinary income, and the Company generally
will be entitled to a deduction, upon the exercise of an NQSO. The amount of
income recognized (and the amount generally deductible by the Company)
generally will be equal to the excess, if any, of the fair market value of the
shares at the time of exercise over the aggregate exercise price paid for the
shares, regardless of whether the exercise price is paid in cash or in shares
or other property. An optionee's basis for the stock for purposes of
determining his or her gain or loss upon a subsequent disposition of the
shares generally will be the fair market value of the stock on the date of
exercise of the NQSO, and any subsequent gain or loss will generally be
taxable as capital gains or losses.     
   
  Incentive Stock Options. An optionee generally will not recognize taxable
income upon either the grant or exercise of an ISO; however, the amount by
which the fair market value of the shares at the time of exercise exceeds the
exercise price will be an "item of tax preference" for the optionee.
Generally, upon the sale or other taxable disposition of the shares of the
Common Stock acquired upon exercise of an ISO, the optionee will recognize
income taxable as capital gains in an amount equal to the excess, if any, of
the amount realized in such disposition over the option exercise price,
provided that no disposition of the shares has taken place within either (a)
two years from the date of grant of the ISO or (b) one year from the date of
exercise. If the shares of Common Stock are sold or otherwise disposed of
before the end of the one-year and two-year periods specified above, the
difference between the ISO exercise price and the fair market value of the
shares on the date of exercise generally will be taxable as ordinary income;
the balance of the amount realized from such disposition, if any, generally
will be taxed as capital gain. If the shares of Common Stock are disposed of
before the expiration of the one-year and two-year periods and the amount
realized is less than the fair market value of the shares at the date of
exercise, the optionee's ordinary income generally is limited to excess, if
any, of the amount realized in such disposition over the option exercise price
paid. The Company (or other employer corporation) generally will be entitled
to a tax deduction with respect     
 
                                      47
<PAGE>
 
   
to an ISO only to the extent the optionee has ordinary income upon sale or
other disposition of the shares of Common Stock.     
   
  SARs. No taxable income is generally recognized upon the receipt of an SAR,
but upon exercise of the SAR the fair market value of the shares (or cash in
lieu of shares) received generally will be taxable as ordinary income to the
recipient in the year of such exercise. The Company generally will be entitled
to a compensation deduction for the same amount which the recipient recognizes
as ordinary income.     
   
  Restricted Stock and Deferred Stock. An employee to whom restricted or
deferred stock is issued generally will not recognize taxable income upon such
issuance and the Company generally will not then be entitled to a deduction,
unless, in the case of restricted stock, an election is made under Section
83(b) of the Code. However, when restrictions on shares of restricted stock
lapse, such that the shares are no longer subject to a substantial risk of
forfeiture, the employee generally will recognize ordinary income and the
Company generally will be entitled to a deduction for an amount equal to the
excess of the fair market value of the shares at the date such restrictions
lapse over the purchase price therefor. Similarly, when deferred stock vests
and is issued to the employee, the employee generally will recognize ordinary
income and the Company generally will be entitled to a deduction for the
amount equal to the fair market value of the shares at the date of issuance.
If an election is made under Section 83(b) with respect to qualifying
restricted stock, the employee generally will recognize ordinary income at the
date of issuance equal to the excess, if any, of the fair market value of the
shares at that date over the purchase price therefor and the Company will be
entitled to a deduction for the same amount. The Code does not permit a
Section 83(b) election to be made with respect to deferred stock.     
   
  Dividend Equivalents. A recipient of a dividend equivalent award generally
will not recognize taxable income at the time of grant, and the Company will
not be entitled to a deduction at that time. When a dividend equivalent is
paid, the participant generally will recognize ordinary income, and the
Company will be entitled to a corresponding deduction.     
   
  Performance Awards. A participant who has been granted a performance award
generally will not recognize taxable income at the time of grant, and the
Company will not be entitled to a deduction at that time. When an award is
paid, whether in cash or Common Stock, the participant generally will
recognize ordinary income, and the Company will be entitled to a corresponding
deduction.     
   
  Stock Payments. A participant who receives a stock payment in lieu of a cash
payment that would otherwise have been made will generally be taxed as if the
cash payment has been received, and the Company generally will be entitled to
a deduction for the same amount.     
   
  Deferred Compensation. Participants who defer compensation generally will
recognize no income, gain or loss for federal income tax purposes when NQSOs
are granted in lieu of amounts otherwise payable, and the Company will not be
entitled to a deduction at that time. When and to the extent such NQSOs are
exercised, the rules regarding NQSOs outlined above will generally apply.     
       
EMPLOYMENT CONTRACTS
   
  In May 1995, the Company entered into an employment agreement with Mr.
Heintzelman. Pursuant to the terms of the agreement, Mr. Heintzelman's base
salary is $125,000 per year, plus a bonus, which was $20,000 in 1995. In
addition, Mr. Heintzelman also receives a $12,000 per year auto allowance
pursuant to the agreement. Mr. Heintzelman was granted options to purchase
200,000 shares of Common Stock of the Company at an exercise price of $0.25
per share at the time of entering into the agreement and additional options to
purchase 10,800 shares of Common Stock of     
 
                                      48
<PAGE>
 
   
the Company at an exercise price of $0.25 per share in January 1996. Grants
were made pursuant to the 1995 Stock Option Plan and vest as follows: 40,000
options vested 90 days after the date of the agreement, one-third of the
remaining aggregate options vested on the first anniversary of the date of
hire and the remainder will vest ratably on a quarterly basis during the two
years following the first anniversary. In May 1996, options to purchase
149,200 shares of Common Stock of the Company at an exercise price of $3.73
per share were granted to Mr. Heintzelman pursuant to the Stock Option Plans.
These options vest as follows: one-third of the options will vest on the first
anniversary of the date of grant and the remaining two-thirds of the options
will vest ratably on a quarterly basis during the two years following the
first anniversary of the date of grant.     
   
  In February 1996, the Company entered into an employment agreement with Mr.
McCleary. Pursuant to the terms of the agreement, Mr. McCleary's base salary
is $175,000 per year ($25,000 of which is conditioned upon the completion of
the Offering), plus a bonus to be awarded annually as part of the Company's
bonus program for its management. Under the agreement, Mr. McCleary is also
entitled to participate in any Company incentive compensation plans, savings
plans, retirement plans, and other employee benefit plans as well as to
receive an auto and expenses allowance. Mr. McCleary was also granted options
to purchase 241,874 shares of Common Stock of the Company at an exercise price
of $0.25 per share at the time of entering into the agreement. The grant was
made pursuant to the 1995 Stock Option Plan and vests as follows: one-third of
the options vest on the first anniversary of the date of hire and the
remaining two-thirds of the options vest ratably on a quarterly basis during
the two years following the first anniversary. In May 1996, options to
purchase an additional 237,326 shares of Common Stock of the Company at an
exercise price of $3.73 per share were granted to Mr. McCleary pursuant to the
Stock Option Plans. These options vest as follows: one-third of the options
vest on the first anniversary of the date of grant and the remaining two-
thirds of the options vest ratably on a quarterly basis during the two years
following the first anniversary of the date of grant. The initial term of the
agreement expires on December 31, 1999, but the agreement is subject to
automatic renewal terms of one year each.     
   
  In March 1996, the Company entered into employment agreements with Messrs.
Deobald, Galleher, and Magliato. Pursuant to the terms of these agreements,
these officers' base salaries are $120,000 per year, plus a bonus to be
awarded annually as part of the Company's bonus program for management. These
officers are also entitled to participate in any Company incentive
compensation plans, retirement plans, and other employee benefit plans as well
as to receive a $6,600 per year auto allowance. Messrs. Deobald, Galleher, and
Magliato were each granted options to purchase 40,000 shares of Common Stock
of the Company at an exercise price of $0.25 per share at the time of entering
into their respective employment agreements. Grants were made pursuant to the
1995 Stock Option Plan and vest as follows: one-third of the options vest on
the first anniversary of the date of hire and the remaining two-thirds of the
options vest on a quarterly basis during the two years following the first
anniversary. In addition, each were granted options to purchase 16,000 shares
of Common Stock of the Company at an exercise price of $3.73 per share,
effective as of May 31, 1996, and 64,000 shares of Common Stock of the Company
at an exercise price of $10.00 per share, effective as of July 19, 1996.
Grants were made pursuant to the Stock Option Plans and vest as follows: one-
third of the options vest on the first anniversary of the date of grant and
the remaining two-thirds of the options vest on a quarterly basis during the
two years following the first anniversary. The initial terms of the agreements
expire in March 1997, but the agreements are subject to automatic renewal
terms of one year each.     
   
  In April 1996, the Company entered into an employment agreement with Mr.
Pendley. Pursuant to the terms of the agreement, Mr. Pendley's base salary is
$89,000 per year, plus a bonus to be awarded annually each December as part of
the Company's bonus program for its management. Under the agreement, Mr.
Pendley is also entitled to participate in any Company incentive compensation
plans, savings plans, retirement plans, and other employee benefit plans as
well as to receive an auto and expenses allowance. Mr. Pendley was also
granted options to purchase 120,000     
 
                                      49
<PAGE>
 
   
shares of Common Stock of the Company at an exercise price of $0.25 per share
in September 1995 and options to purchase an additional 6,400 shares of Common
Stock of the Company at an exercise price of $0.25 per share in January 1996.
Grants were made pursuant to the 1995 Stock Option Plan and vest as follows:
one-third of the aggregate options vested on December 15, 1995, the first
anniversary of the date of hire, and the remaining two-thirds of the aggregate
options vest ratably on a quarterly basis during the two years following the
first anniversary, a portion of which have already vested. In May 1996,
options to purchase an additional 89,600 shares of Common Stock of the Company
at an exercise price of $3.73 per share were granted to Mr. Pendley pursuant
to the Stock Option Plans. These options vest as follows: one-third of the
options will vest on the first anniversary of the dates of grant and the
remaining two-thirds of the options will vest ratably on a quarterly basis
during the two years following the first anniversary of the date of grant. The
initial term of the agreement expires on March 31, 1997, but the agreement is
subject to automatic renewal terms of one year each.     
   
  In June 1996, the Company entered into an employment agreement with Mr.
Brandt. Pursuant to the terms of the agreement, Mr. Brandt's base salary is
$125,000 per year, plus a bonus to be awarded annually each December as part
of the Company's bonus program for its management. Under the agreement, Mr.
Brandt is also entitled to participate in any Company incentive compensation
plans, savings plans, retirement plans, and other employee benefit plans as
well as to receive an auto and expenses allowance. Mr. Brandt was also granted
options to purchase 40,000 shares of Common Stock of the Company, at an
exercise price of $3.73 per share in May 1996, and 40,000 shares of Common
Stock of the Company, at an exercise price of $10.00 per share in June 1996.
Grants were made pursuant to the Stock Option Plans and vest as follows: one-
third of the options vest on the first anniversary of the date of grant and
the remaining two-thirds of the options vest on a quarterly basis during the
two years following the first anniversary. The grant was made pursuant to the
Stock Option Plan and the options vest in accordance with the four-year
schedule contained therein. The initial term of the agreement expires on May
31, 1997, but the agreement is subject to automatic renewal terms of one year
each.     
 
                                      50
<PAGE>
 
                             CERTAIN TRANSACTIONS
   
  The Company was incorporated on January 8, 1990 by Mr. Humphrey and Mr.
Doughney (the "Founders"). Mr. Humphrey contributed certain computer hardware
to the Company in exchange for 970,744 shares of Common Stock, and Mr.
Doughney contributed certain computer software to the Company in exchange for
647,163 shares of Common Stock.     
          
  On July 1, 1994, Robert M. Stewart, a director of the Company, and six other
individuals who are not affiliated with the Company loaned the Company
$300,000 in cash. In consideration for their loan, the Company issued to these
individuals (i) 8% promissory notes (the "Bridge Notes") in aggregate
principal amount of $300,000 and (ii) warrants to purchase 190,883 shares of
the Common Stock (the "Bridge Warrants"). The Bridge Notes were to mature on
the earlier of July 12, 1995 and the date on which certain payments were made
under the Securities Purchase Agreement.     
   
  On March 24, 1995, the Company entered into the Securities Purchase
Agreement with the Founders and Grotech IV, Venrock and Southern, pursuant to
which the Company issued a total of 45,454.54 shares of convertible preferred
stock (since redesignated Series A Convertible Preferred Stock), par value
$1.00 per share, together with warrants to purchase 1,120,000 shares of Common
Stock of the Company, for an aggregate cash investment of $4,000,000. The
Bridge Notes were repaid at their face amount with a portion of the proceeds
of this investment. Grotech IV was issued 18,181.82 shares of Series A
Preferred Stock and warrants to purchase 448,000 shares of Common Stock in
consideration of its investment of $1.6 million in cash, Venrock was issued
15,909.09 shares of Series A Preferred Stock (4,925.83 shares of which were
assigned to Venrock II) and warrants to purchase 392,000 shares of Common
Stock (121,348 of which were assigned to Venrock II) in consideration of its
investment of $1.4 million in cash and Southern was issued 11,363.63 shares of
Series A Preferred Stock and warrants to purchase 280,000 shares of Common
Stock in consideration of its investment of $1.0 million in cash.
Representatives of each of Grotech IV, Venrock and Southern were elected to
the Company's Board of Directors pursuant to the Securities Purchase
Agreement.     
   
  As a fee for arranging the above investment, the Company made a cash payment
of $200,000 and issued warrants to purchase 91,200 shares of Common Stock to
Mr. Stewart and nine other individuals (the "Fee Warrants" and, together with
the Bridge Warrants, the "Initial Warrants"). These individuals (other than
Mr. Stewart) are not affiliated with the Company.     
   
  Pursuant to a Stockholders Agreement (the "Stockholders Agreement"), dated
March 24, 1995, by and among the Company, Grotech IV, Venrock, Southern, Mr.
Humphrey and Mr. Doughney, the parties thereto agreed to grant rights of first
refusal to the other parties to such agreement in the event of the death,
disability or termination of employment of either Mr. Humphrey or Mr. Doughney
or in the event that either Mr. Humphrey or Mr. Doughney wishes to transfer
any of their shares of Common Stock of the Company. The provisions of the
Stockholders Agreement will terminate effective immediately prior to
consummation of the Offering.     
   
  On November 28, 1995, Grotech IV, Venrock, Southern and Venrock Associates
II, L.P. ("Venrock II" and, together with Grotech IV, Venrock and Southern,
the "Investors") loaned to the Company $800,000, $483,307, $500,000 and
$216,693 in cash, respectively. In consideration of these loans, the Company
issued 10% promissory notes due June 1, 1996 in the principal amount of
$2,000,000 (the "November 1995 Notes") and warrants to purchase 299,946 shares
of Common Stock to Grotech IV, Venrock, Venrock II and Southern as follows:
Grotech IV purchased promissory notes in the principal amount of $800,000 and
warrants to purchase 119,978 shares of Common Stock; Venrock purchased
promissory notes in the amount of $483,307 and warrants to purchase 72,483
shares of Common Stock; Venrock II purchased promissory notes in the principal
amount of $216,693     
 
                                      51
<PAGE>
 
   
and warrants to purchase 32,498 shares of Common Stock; and Southern purchased
promissory notes in the principal amount of $500,000 and warrants to purchase
74,987 shares of Common Stock.     
   
  On February 23, 1996, the Company issued additional 10% promissory notes due
June 1, 1996 in the principal amount of $1,000,000 (the "February 1996 Notes")
and additional warrants to purchase 166,378 shares of Common Stock to the
Investors as follows: Grotech IV purchased promissory notes in the principal
amount of $400,000 and warrants to purchase 66,551 shares of Common Stock for
a cash purchase price of $400,000; Venrock purchased promissory notes in the
principal amount of $217,000 and warrants to purchase 36,104 shares of Common
Stock for a cash purchase price of $217,000; Venrock II purchased promissory
notes in the principal amount of $133,000 and warrants to purchase 22,128
shares of Common Stock for a cash purchase price at $133,000; and Southern
purchased promissory notes in the principal amount of $250,000 and warrants to
purchase 41,595 shares of Common Stock for a cash purchase price of $250,000.
       
  On May 21, 1996, the Company issued additional promissory notes in the
principal amount of $1,000,000 (the "Convertible Notes") convertible into
shares of Series B Preferred Stock of the Company to the Investors as follows:
Grotech IV purchased promissory notes in the principal amount of $400,000 for
a cash purchase price of $400,000; Venrock purchased promissory notes in the
principal amount of $217,000 for a cash purchase price of $217,000; Venrock II
purchased promissory notes in the principal amount of $133,000 for a cash
purchase price of $133,000; and Southern purchased promissory notes in the
principal amount of $250,000 for a cash purchase price of $250,000.     
   
  On May 30, 1996, the Company, the Founders, the Investors, Grotech Partners,
Grotech Companion, Grotech Pennsylvania, Blue Chip and Crisler Capital
Company, Limited Partnership (together with the Investors, Grotech Partners,
Grotech Companion, Grotech Pennsylvania and Blue Chip, the "Purchasers")
entered into the Purchase and Exchange Agreement, whereby the Investors
exchanged $2.0 million principal amount of November 1995 Notes and $1.0
million principal amount February 1996 Notes (together with the right to
receive $126,389 in accrued interest thereon from the date of issuance) for
31,263.89 shares of Series B Convertible Preferred Stock of the Company, par
value $1.00 per share (the "Series B Preferred Stock"), and converted $1.0
million principal amount of Convertible Notes, in accordance with their terms,
into 10,000 shares of Series B Preferred Stock. In addition, the Purchasers
paid $4,000,000 in cash in exchange for a further 40,000 shares of Series B
Preferred Stock. The above-referenced exchange, conversion, and purchase
resulted in the following acquisitions of Series B Preferred Stock: Grotech IV
acquired 22,505.56 shares of Series B Preferred Stock; Grotech Partners
acquired 8,537 shares of Series B Preferred Stock; Grotech Companion acquired
930 shares of Series B Preferred Stock; Grotech Pennsylvania acquired 533
shares of Series B Preferred Stock; Venrock acquired 10,914.77 shares of
Series B Preferred Stock; Venrock II acquired 5,860.92 shares of Series B
Preferred Stock. Southern acquired 11,982.64 shares of Series B Preferred
Stock; Blue Chip acquired 16,000 shares of Series B Preferred Stock; and
Crisler acquired 4,000 shares of Series B Preferred Stock.     
   
  The transactions of May 21 and May 30, 1996 are collectively referred to
herein as the "1996 Venture Financing." A representative of Blue Chip holds a
seat on the Company's Board of Directors pursuant to the terms of the Purchase
and Exchange Agreement. The rights of representatives of each of Grotech IV,
Venrock and Southern, as well as each of the Founders, to have seats on the
Company's Board of Directors, granted pursuant to the Securities Purchase
Agreement, were restated in the Purchase and Exchange Agreement. In addition,
pursuant to the Purchase and Exchange Agreement, Crisler obtained the right to
designate a representative (R. Dean Meiszer) to act as an observer at meetings
of the Company's Board of Directors. Such stockholders' rights to designate
directors or representatives to attend board meetings under the Purchase and
Exchange Agreement will terminate effective immediately prior to consummation
of the Offering. See "Management--Board Composition."     
 
                                      52
<PAGE>
 
   
  The holders of all outstanding shares of Series A Preferred Stock and Series
B Preferred Stock have agreed to convert their outstanding shares of Series A
Preferred Stock and Series B Preferred Stock, in accordance with their
respective terms, into 2,680,336 shares of Common Stock at or prior to the
consummation of the Offering (the "Preferred Stock Conversion"). As of the
date hereof, each share of Series A Preferred Stock is convertible into
approximately 11.0 shares of Common Stock and each share of Series B Preferred
Stock is convertible into approximately 26.83 shares of Common Stock. In
addition, all holders of warrants to purchase Common Stock (other than WinStar
and one holder of Initial Warrants) will exercise such warrants to purchase
1,868,408 shares of Common Stock upon consummation at or prior to the Offering
(the "Warrant Exercise"). See "Capital Stock of the Company--Warrants."     
 
 
                                      53
<PAGE>
 
                            PRINCIPAL STOCKHOLDERS
   
  The following table sets forth, as of June 30, 1996 and as adjusted to
reflect the Preferred Stock Conversion and the Warrant Exercise, certain
information with respect to the beneficial ownership of the Company's Common
Stock by: (i) each person (or group of affiliated persons) of the Company
known by the Company to own beneficially more than five percent of the
outstanding Common Stock; (ii) each director of the Company; (iii) the Named
Executive Officer and (iv) all directors and executive officers as a group.
Information is set forth on both a pre-Offering and a post-Offering basis.
Except as indicated in the footnotes to this table, the persons named in the
table, based on information provided by such persons, have sole voting and
investment power with respect to all shares of Common Stock shown as
beneficially owned by them.     
 
<TABLE>   
<CAPTION>
                                                                PERCENTAGE OF
                                                               TOTAL SHARES(1)
                                               SHARES OF      -----------------
                                           STOCK BENEFICIALLY  BEFORE   AFTER
                     NAME                        OWNED        OFFERING OFFERING
                     ----                  ------------------ -------- --------
<S>                                        <C>                <C>      <C>
Grotech Investors(2)......................     1,706,664        26.2%    16.6%
Venrock Investors(3)......................     1,180,311        18.1     11.5
Douglas E. Humphrey.......................       970,744        14.9      9.5
Southern Venture Fund II, L.P.(4).........       843,079        12.9      8.2
Michael T. Doughney.......................       647,163         9.9      6.3
Blue Chip Capital Fund Limited Partner-
 ship(5)..................................       429,285         6.6      4.2
Robert M. Stewart.........................        39,472           *        *
Frank A. Adams(2).........................     1,706,664        26.2     16.6
Ray A. Rothrock(3)........................     1,180,311        18.1     11.5
William F. Earthman III(4)................       843,079        12.9      8.2
John H. Wyant(5)..........................       429,285         6.6      4.2
Christopher R. McCleary(6)................           --          --       --
Thomas M. Cato............................           --          --       --
All directors and executive officers as a
 group
 (14 persons)(7)..........................     5,974,633        91.0%    57.7%
</TABLE>    
- --------
 *Less than one percent.
   
(1) Assumes no exercise of the Underwriters' over-allotment option. The
    Company has granted the Underwriters an over-allotment option to purchase
    up to 562,500 shares of Common Stock.     
   
(2) The Grotech Investors consist of Grotech IV, Grotech Partners, Grotech
    Companion, and Grotech Pennsylvania. The address of the Grotech Investors
    is 9690 Deereco Road, Timonium, MD 21093. The shares represent 1,438,361,
    229,050, 24,952, and 14,228 shares owned by Grotech IV, Grotech Partners,
    Grotech Companion, and Grotech Pennsylvania respectively. Mr. Adams, a
    director of the Company, is also the general partner of Grotech Partners,
    Grotech Capital Group IV, Inc. (the general partner of Grotech IV), and
    Grotech Capital Group, Inc. (the general partner of Grotech Companion and
    Grotech Pennsylvania). Mr. Adams disclaims beneficial ownership of the
    shares held by the Grotech Investors, except to the extent of his economic
    interest in the shares held by the Grotech Investors.     
   
(3) The Venrock Investors consist of Venrock and Venrock II. The address of
    the Venrock Investors is 30 Rockefeller Plaza, Suite 5508, New York, New
    York 10112. The shares represent 797,014 shares held by Venrock and
    383,296 shares held by Venrock II. Mr. Rothrock, a director of the
    Company, is also a general partner of Venrock and Venrock II. Mr. Rothrock
    disclaims beneficial ownership of the shares held by the Venrock
    Investors, except to the extent of his economic interest in the shares
    held by the Venrock Investors.     
(4) The address of Southern Venture Fund II, L.P. is 310 25th Avenue, North,
    Suite 103, Nashville, TN 37203. Mr. Earthman, a director of the Company,
    is also the general partner of Southern. Mr. Earthman disclaims beneficial
    ownership of the shares held by Southern, except to the extent of his
    economic interest in the shares held by Southern.
(5) Blue Chip Capital Fund Limited Partnership's address is 2000 PNC Center,
    201 East Fifth Street, Cincinnati, OH 45202. Mr. Wyant is the president of
    Blue Chip Venture Company, the general partner of Blue Chip. Mr. Wyant
    disclaims beneficial ownership of the shares held by Blue Chip, except to
    the extent of his economic interest in the shares held by Blue Chip.
 
                                      54
<PAGE>
 
   
(6) Mr. McCleary, the Chairman, President and Chief Executive Officer of the
    Company holds options to purchase 480,000 shares of Common Stock, none of
    which are exercisable within 60 days of July 1, 1996.     
   
(7) Includes 111,166 options held by Mr. Heintzelman that are presently
    exercisable or that will become exercisable within 60 days of July 1,
    1996. See Notes 2, 3, 4, and 5 above.     
 
                         CAPITAL STOCK OF THE COMPANY
 
  The following description of the Company's capital stock does not purport to
be complete and is subject in all respects to applicable Delaware law and to
the provisions of the Company's Certificate of Incorporation and Bylaws,
copies of which have been filed as exhibits to the Registration Statement of
which this Prospectus is a part.
   
  The authorized capital stock of the Company currently consists of 49,800,000
shares of Common Stock, $0.01 par value, and 200,000 shares of Preferred
Stock, $1.00 par value. As of July 1, 1996 there were 1,617,907 shares of
Common Stock issued and outstanding, 45,454.54 shares of Series A Preferred
Stock issued and outstanding, and 81,263.89 shares of Series B Preferred Stock
issued and outstanding. Upon consummation of the Offering, the Preferred Stock
Conversion and the Warrant Exercise and assuming no exercise of the
Underwriters' over-allotment option, there will be 9,863,991 shares of Common
Stock issued and outstanding and no shares of Preferred Stock issued and
outstanding. An additional 2,055,500 shares of Common Stock will be issuable
upon exercise of outstanding options granted under the Stock Option Plans, and
240,000 shares of Common Stock will be issuable upon exercise of warrants held
by WinStar.     
   
  In connection with the reincorporation of the Company as a Delaware
corporation, the Company will amend and restate its Certificate of
Incorporation. Thereafter, the authorized capital stock of the Company shall
consist of 47,000,000 shares of Common Stock and 3,000,000 shares of Preferred
Stock.     
 
COMMON STOCK
 
  Each holder of Common Stock is entitled to one vote per share of record on
all matters to be voted upon by the shareholders. Holders will not have
cumulative voting rights in connection with the election of directors (or any
other matter). Subject to the preferential rights of any preferred stock that
may at the time be outstanding, each share of Common Stock will have an equal
and ratable right to receive dividends when, if and as declared from time to
time by the Board of Directors out of funds legally available therefor. The
Company has been, and may in the future be, subject to certain agreements
which restrict the payment of dividends. The Company does not anticipate
paying cash dividends in the foreseeable future. See "Dividend Policy."
   
  In the event of liquidation, dissolution or winding up of the Company,
holders of Common Stock are entitled to share ratably in all assets remaining
after payments to creditors and after satisfaction of the liquidation
preference, if any, of any preferred stock that may at the time be
outstanding. Holders of Common Stock have no preemptive or redemption rights
and are not subject to further calls or assessments by the Company.
Immediately upon consummation of the Offering, all of the then outstanding
shares of Common Stock will be validly issued, fully paid and nonassessable.
As of June 30, 1996, there were two record holders of the Common Stock. After
giving effect to the Preferred Stock Conversion and the Warrant Exercise, but
before giving effect to the consummation of the Offering, there will be
approximately 21 record holders of the Common Stock.     
 
PREFERRED STOCK
   
  The holders of all outstanding shares of Preferred Stock have agreed to
convert all of such shares into a total of 2,680,335 shares of Common Stock
upon consummation of the Offering. Thereafter, the Board of Directors will
have the authority to issue up to 3,000,000 shares of Preferred Stock in one
or more series, to fix the rights, preferences, privileges and restrictions
granted to or imposed upon any unissued shares of Preferred Stock and to fix
the number of shares constituting any series and the     
 
                                      55
<PAGE>
 
   
designations of such series, without any further vote or action by the
stockholders. The Board of Directors, without stockholder approval, will be
able to issue Preferred Stock with voting and conversion rights which could
adversely affect the voting power of the holders of Common Stock. The Company
has no present plans to issue any Preferred Stock. As of June 30, 1996, there
were nine holders of the Preferred Stock of the Company.     
 
WARRANTS
   
  The Company has issued warrants to purchase an aggregate of 2,108,408 shares
of Common Stock. Upon consummation of the Offering and the Warrant Exercise,
the warrants held by WinStar to purchase 240,000 shares of Common Stock (the
"WinStar Warrants") will remain outstanding. The exercise price of the WinStar
Warrants is $3.75 per share, and the WinStar Warrants expire on June 10, 2001.
All other holders of warrants to purchase Common Stock have agreed to exercise
such warrants at or prior to the consummation of the Offering, with the
exception of one holder of Initial Warrants to purchase 15,200 shares of
Common Stock, who has not yet made such an election.     
 
DELAWARE LAW AND LIMITATIONS ON CHANGES IN CONTROL
   
  Section 203 of the Delaware General Corporation Law (the "DGCL") prevents an
"interested stockholder" (defined in Section 203, generally, as a person
owning 15% or more of a corporation's outstanding voting stock) from engaging
in a "business combination" (as defined in Section 203) with a publicly-held
Delaware corporation for three years following the date such person became an
interested stockholder unless (i) before such person became an interested
stockholder, the board of directors of the corporation approved the
transaction in which the interested stockholder became an interested
stockholder or approved the business combination; (ii) upon consummation of
the transaction that resulted in the interested stockholder's becoming an
interested stockholder, the interested stockholder owns at least 85% of the
voting stock of the corporation outstanding at the time the transaction
commenced (excluding stock held by directors who are also officers of the
corporation and by employee stock plans that do not provide employees with the
right to determine confidentially whether shares held subject to the plan will
be tendered in a tender or exchange offer); or (iii) following the transaction
in which such person became an interested stockholder, the business
combination is approved by the board of directors of the corporation and
authorized at a meeting of stockholders by the affirmative vote of the holders
of 66 2/3% of the outstanding voting stock of the corporation not owned by the
interested stockholder.     
   
  The Company's Bylaws will generally require 50 days advance notice of any
action to be proposed at any meeting of stockholders and set forth other
specific procedures that a stockholder must follow. There will also be
specific procedures, including advance notice, for the nomination of a person
to the Board of Directors when such person is nominated other than at the
direction of the Board. In addition, the Certificate of Incorporation will
provide that a special meeting of the Company's stockholders may only be
called by the Board of Directors; no such meeting may be called by the
stockholders. Further, the Certificate of Incorporation will eliminate the
ability of stockholders to act by written consent and consequently
stockholders may only act at meetings thereof. Any amendment of certain
provisions of the Certificate of Incorporation and Bylaws by stockholders will
require the affirmative vote of the holders of at least 75% of the shares of
the Common Stock then outstanding.     
   
  In addition, the Directors of the Company will be divided into three class,
with the term of one class expiring each year. Directors may be removed, with
or without cause, only with affirmative vote of holders of at least 75% of the
shares of Common Stock than outstanding. This provision could delay the
replacement of a majority of the Directors and have the effect of making
changes in the Board of Directors more difficult than if such provision were
not in place.     
 
 
                                      56
<PAGE>
 
   
  These Certificate of Incorporation and Bylaw provisions, including the
provisions authorizing the Board of Directors to issue preferred stock without
stockholder approval, and the provisions of Section 203 of the DGCL could have
the effect of delaying, deferring or preventing a transaction involving a
change in control of the Company or the removal of existing management,
including transactions in which stockholders might receive a substantial
premium for their shares over then-current market prices. See "Risk Factors--
Control by Certain Stockholders; Anti-Takeover Measures."     
 
LIMITATION ON DIRECTORS' AND OFFICERS' LIABILITY
   
  The Certificate of Incorporation will provide that a director of the Company
will not be personally liable to the Company or its stockholders for monetary
damages for any breach of fiduciary duty as a director, except in certain
cases where liability is mandated by the DGCL. The provision will have no
effect on any non-monetary remedies that may be available to the Company or
its stockholders, nor will it relieve the Company or its directors from
compliance with federal or state securities laws. The Bylaws of the Company
will generally provide that the Company shall indemnify, to the fullest extent
permitted by law, any person who was or is a party or is threatened to be made
a party to any threatened, pending or completed action, suit, investigation,
administrative hearing or any other proceeding (each, a "Proceeding") by
reason of the fact that he is or was a director or officer of the Company, or
is or was serving at the request of the Company as a director, officer,
employee or agent of another entity, against expenses (including attorneys'
fees) and losses, claims, liabilities, judgments, fines and amounts paid in
settlement actually incurred by him in connection with such Proceeding.     
 
CERTAIN EFFECTS OF AUTHORIZED BUT UNISSUED STOCK
   
  Upon consummation of the Offering, there will be 37,136,009 shares of Common
Stock and 3,000,000 shares of Preferred Stock available for future issuance
without stockholder approval (assuming no exercise of the Underwriters' over-
allotment option). These additional shares may be utilized for a variety of
corporate purposes, including future public offerings to raise additional
capital or to facilitate corporate acquisitions. The Company does not
currently have plans to issue additional shares of capital stock, other than
shares of Common Stock which may be issued upon the exercise of employee
options or the WinStar Warrants. See "Shares Eligible for Future Sale."     
 
TRANSFER AGENT AND REGISTRAR
   
  The transfer agent and registrar for the Common Stock is American Stock
Transfer & Trust Company.     
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
GENERAL
   
  Future sales of substantial amounts of the Company's Common Stock could
adversely affect the market price of the Common Stock. Several of the
Company's principal stockholders hold a significant portion of the Company's
outstanding Common Stock, and a decision by one or more of these stockholders
to sell their shares could adversely affect the market price of the Common
Stock. The Shares offered hereby (plus any shares issued upon exercise of the
Underwriters' over-allotment option) will be freely tradeable without
restriction, except to the extent that such shares are purchased by
"affiliates" of the Company. The holders of Common Stock, and warrants to
purchase Common Stock, of the Company, including officers and directors of the
Company that hold shares of Common     
 
                                      57
<PAGE>
 
   
Stock, have entered into contractual agreements with the Underwriters (the
"Lock-Up Agreements") providing that they will not offer, sell or contract to
sell, or otherwise dispose of, directly or indirectly, or announce an offering
of, any shares of Common Stock of the Company beneficially owned by them or any
securities convertible into, or exchangeable for, the Company's Common Stock
for a period of 180 days after the date of the Underwriting Agreement without
the prior written consent of the representatives of the Underwriters, other
than shares of stock disposed of as bona fide gifts. As a result,
notwithstanding possible earlier eligibility for sale under the provisions of
Rules 144 and 144(k) under the Securities Act of 1933, as amended (the "Act"),
shares subject to the Lock-Up Agreements will not be saleable until the Lock-Up
Agreements expire or their terms are waived by the Underwriters'
representatives. Assuming the Underwriters' representatives do not release
stockholders from the Lock-Up Agreements, the following shares will be eligible
for sale in the public market at the following times: beginning on the
Effective Date, only the shares sold in the Offering to non-affiliates will be
immediately available for sale in the public market; beginning 180 days after
the date of the Underwriting Agreement, 1,617,907 shares will be eligible for
sale pursuant to Rule 144, all of which are held by affiliates of the Company.
An additional 4,548,744 shares will become eligible for sale pursuant to Rule
144 at various times during the two-year period following the Effective Date
(although such shares will continue to be subject to the Lock-Up Agreements
until the expiration of the terms thereof). The holders of approximately
4,266,660 shares of the Common Stock are entitled to certain rights with
respect to the registration of such shares under the Act beginning six months
after the Effective Date. In addition, the Company may register certain shares
of Common Stock issuable under the Stock Option Plans, and such registration
shall be effective upon filing with the Commission. As of June 30, 1996, there
were outstanding options under the Stock Option Plans to purchase 2,055,500
shares, of which options for 299,833 shares were fully vested and exercisable.
No shares have been issued to date under the Stock Option Plans.     
   
  In general, under Rule 144 as currently in effect, a person (or persons whose
shares are aggregated), including an affiliate of the Company, who has
beneficially owned shares for at least two years (including holding periods of
prior owners other than affiliates) is entitled to sell, within any three-month
period commencing 90 days after the closing of this Offering, a number of
shares of that does not exceed the greater of (i) 1% of the then outstanding
shares of Common Stock (98,640 shares immediately after the Offering) or (ii)
the average weekly trading volume in the Common Stock during the four calendar
weeks preceding such sale, subject to the filing of a Form 144 with respect to
such sale and certain other limitations and restrictions. In addition, a person
who is not deemed to have been an affiliate of the Company at any time during
90 days preceding a sale, and who has beneficially owned the shares proposed to
be sold for at least three years (including holding periods of prior owners
other than affiliates), would be entitled to sell such shares under Rule 144(k)
without regard to the requirements described above.     
 
REGISTRATION RIGHTS
   
  Pursuant to the Securities Purchase Agreement, as amended by the Purchase and
Exchange Agreement, Grotech IV, Grotech Partners, Grotech Companion, Grotech
Pennsylvania, Venrock, Venrock II, Southern, Blue Chip and Crisler are entitled
to certain rights with respect to the registration of their shares of
Registrable Securities (as defined therein) under the Securities Act. Subject
to certain limitations, on the first two occasions that the Company registers
any of its securities under the Securities Act, either for its own account or
the account of other security holders, such holders are entitled to written
notice of the registration and are entitled to include (at the Company's
expense) such holder's shares therein; provided, among other conditions, that
the underwriters of any such offering have the right to limit the number of
such shares included in the registration. Pursuant to the warrant certificates
evidencing the Initial Warrants, the individuals to whom the Initial Warrants
were issued hold the rights described above. In addition, pursuant to the
warrant certificate evidencing the WinStar Warrants, WinStar also holds
registration rights identical to those described above, except that WinStar's
rights are not limited to the first two registrations. Moreover, holders of at
least a majority of     
 
                                       58
<PAGE>
 
   
the shares of Registrable Securities can require the Company, at any time
after six months from the effective date of the initial offering of shares of
its Common Stock pursuant to a registration statement under the Securities
Act, but on only one occasion, to file a registration statement under the
Securities Act with respect to such shares, and the Company is required to
effect such registration and maintain the effectiveness of such registration
for a period of three months, subject to certain conditions and limitations.
All fees, costs and expenses of such registration of securities (other than
underwriting discounts in the case of the first type of registrations
described above, and other than legal and accounting expenses of such holders)
will be borne by the Company. However, Grotech IV, Grotech Partners, Grotech
Companion, Grotech Pennsylvania, Venrock, Venrock II, Southern, Blue Chip,
Crisler and Mr. Stewart have agreed to waive any and all rights to cause the
Company to register any securities held by the holder under the Securities
Act, or the securities laws of any state in connection with a Qualifying IPO.
For the purposes thereof, a "Qualifying IPO" means an underwritten public
offering of the Company of shares of Common Stock which is consummated on or
before December 31, 1996, the net proceeds of which exceed $25,000,000.     
 
                                 UNDERWRITING
   
  Upon the terms and subject to the conditions set forth in the Underwriting
Agreement, the Company has agreed to sell to each of the Underwriters named
below (the "Underwriters"), for whom Salomon Brothers Inc and Montgomery
Securities are acting as representatives (the "Representatives"), and each of
such Underwriters has severally agreed to purchase from the Company the
respective number of shares of Common Stock set forth opposite its name below:
    
<TABLE>       
<CAPTION>
      UNDERWRITERS                                              NUMBER OF SHARES
      ------------                                              ----------------
      <S>                                                       <C>
      Salomon Brothers Inc.....................................
      Montgomery Securities....................................
                                                                   ---------
          Total................................................    3,750,000
                                                                   =========
</TABLE>    
 
  In the Underwriting Agreement, the several Underwriters have agreed, subject
to the terms and conditions set forth therein, to purchase all the shares of
Common Stock offered hereby (other than those subject to the over-allotment
option described below) if any such shares are purchased. In the event of a
default by an Underwriter, the Underwriting Agreement provides that, in
certain circumstances, the purchase commitments of the non-defaulting
Underwriters may be increased or the Underwriting Agreement may be terminated.
 
  The Representatives have advised the Company that the several Underwriters
propose initially to offer the shares of Common Stock to the public at the
price to public set forth on the cover page of this Prospectus and to certain
dealers at such price less a concession not in excess of $   per share. The
Underwriters may allow and such dealers may reallow a concession not in excess
of $   per share to certain other dealers. After the initial public offering,
the price to public and such concessions may be changed.
   
  The Company has granted the Underwriters an option, exercisable within 30
days of the date of this Prospectus, to purchase up to 562,500 additional
shares of Common Stock from the Company at the same price per share as the
initial 3,750,000 shares of Common Stock to be purchased by the Underwriters.
The Underwriters may exercise such option only to cover over-allotments, if
any,     
 
                                      59
<PAGE>
 
incurred in connection with the Offering. To the extent the Underwriters
exercise such option, each Underwriter will have a firm commitment, subject to
certain conditions, to purchase the same proportion of such additional shares
of Common Stock as the number of shares of Common Stock to be purchased and
offered by such Underwriter in the table above bears to the total number of
shares of Common Stock initially offered by the Underwriters hereby.
 
  The Underwriting Agreement provides that the Company will indemnify the
several Underwriters against certain liabilities, including liabilities under
the Act, or contribute to payments the Underwriters may be required to make in
respect thereof.
 
  The Company, its directors, officers and holders of its Common Stock, and
warrants to purchase its Common Stock, have each agreed with the Underwriters
not to offer, sell or contract to sell, or otherwise dispose of, directly or
indirectly, or announce the offering of, or file or cause to be filed any
registration statements under the Act with respect to any shares of Common
Stock or any securities or options convertible into, or exchangeable or
exercisable for, shares of Common Stock for a period of 180 days from the date
of the Underwriting Agreement without the prior written consent of the
Representatives.
 
  The Representatives do not intend to confirm sales to any account over which
they exercise discretionary authority.
 
  Prior to this Offering, there has been no public market for the Common
Stock. Accordingly, the initial public offering price for the Common Stock was
determined by negotiation among the Company and the Representatives. Among the
factors considered in determining the initial public offering price were the
services, the experience of management, the economic conditions of the
Company's industry in general, the general condition of the equity securities
market and the demand for similar securities of companies considered
comparable to the Company and other relevant factors. There can be no
assurance, however, that the prices at which the Common Stock will sell in the
public market after this Offering will not be lower than the price at which
the Shares are sold by the Underwriters.
 
                                 LEGAL MATTERS
 
  The legality of the Common Stock offered hereby will be passed upon for the
Company by Latham & Watkins, Washington, D.C. Certain legal matters will be
passed upon for the Underwriters by Cravath, Swaine & Moore, New York, New
York.
 
                                    EXPERTS
   
  The financial statements of the Company at December 31, 1994, December 31,
1995 and June 30, 1996, and for each of the three years in the period ended
December 31, 1995 and the six-month periods ended June 30, 1995 and 1996,
appearing in this Prospectus have been audited by Ernst & Young LLP,
independent auditors, as set forth in their report thereon appearing elsewhere
herein, and are included in reliance upon such report given upon the authority
of such firm as experts in accounting and auditing.     
 
                                      60
<PAGE>
 
                                    GLOSSARY
 
<TABLE>
<S>                            <C>
56 Kbps....................... Equivalent to a single high-speed telephone
                               service line; capable of transmitting one voice
                               call or 56 Kbps of data. Currently in widespread
                               use by medium and large businesses primarily for
                               entry level high-speed data and very low-speed
                               video applications.
ATM........................... Asynchronous Transfer Mode. An information
                               transfer standard for routing traffic based on
                               an address contained within the first five bytes
                               of a fifty-three byte-long, fixed-length packet
                               or cell.
Backbone...................... A centralized high-speed network that
                               interconnects smaller, independent networks.
Bandwidth..................... The number of bits of information which can move
                               through a communications medium in a given
                               amount of time; the capacity of a
                               telecommunications circuit/network to carry
                               voice, data and video information. Typically
                               measured in Kbps and Mbps. Bandwidth from public
                               networks is typically available to business and
                               residential end-users in increments from 56 Kbps
                               to T-3.
CAP........................... Competitive Access Provider. A
                               telecommunications company that provides an
                               alternative to a LEC for local transport of
                               private line and special access
                               telecommunications services.
CSU/DSU (also IDSU, SMDSU).... Channel Service Unit/Digital Service Unit. A
                               device used to terminate telephone company
                               equipment and prepare data for router interface.
DS-1 or T-1................... A data communications circuit capable of
                               transmitting data at 1.5 Mbps; can transmit
                               compressed full motion video. Currently in
                               widespread use by medium and large businesses
                               for video, voice, and data applications.
DS-3 or T-3................... A data communications circuit capable of
                               transmitting data at 45 Mbps. Equivalent to 28
                               T-1's of data capacity. Can also transmit
                               uncompressed, TV broadcast quality, full motion
                               video. Currently used only by
                               businesses/institutions and carriers for high
                               end applications.
Ethernet...................... A common method of networking computers in a
                               LAN. Ethernet will handle about 10 Mbps and can
                                                                               be used with almost any kind of computer.
 
FDDI.......................... Fiber Distributed Data Interface. A standard for
                               transmitting data on optical-fiber cables at a
                               rate of around 100 Mbps (10 times as fast as
                               Ethernet, about twice as fast as T-3).
</TABLE>
 
                                       61
<PAGE>
 
<TABLE>   
<S>                           <C>
Firewall..................... A system placed between networks that filters
                              data passing through it and prevents
                              unauthorized traffic, thereby enhancing the
                              security of the network.
Frame Relay.................. An information transfer standard for relaying
                              traffic based on an address contained in the six
                              byte header of a variable length packet that is
                              up to 2,106 bytes long. Frame Relay has less
                              overhead than ATM but may be difficult to
                              implement at speeds greater than 45 Mbps.
Internet..................... A global collection of interconnected computer
                              networks which use TCP/IP, a common
                              communication protocol.
ISDN......................... Integrated Services Digital Network. An
                              information transfer standard for transmitting
                              digital voice and data over telephone lines at
                              speeds up to 128 Kbps.
IXC.......................... Interexchange Carrier. A telecommunications
                              company that provides telecommunications
                              services between local exchanges on an
                              interstate or intrastate basis.
Kbps......................... Kilobits per second. A transmission rate. One
                              kilobit equals 1,024 bits of information.
LAN.......................... Local Area Network. A data communications
                              network designed to interconnect personal
                              computers, workstations, minicomputers, file
                              servers and other communications and computing
                              devices within a localized environment.
Leased line.................. Telecommunications line dedicated to a
                              particular customer along a predetermined
                              routes.
LEC.......................... Local Exchange Carrier. A telecommunications
                              company that provides telecommunications
                              services in a geographic area in which calls
                              generally are transmitted without toll charges.
MAE-East..................... A major peering point (exchange point for
                              traffic) among ISPs, located in Falls Church,
                              Virginia.
MAE-West..................... A major peering point (exchange point for
                              traffic) among ISPs, located in Santa Clara,
                              California.
Mbps......................... Megabits per second. A transmission rate. One
                              megabit equals 1,024 kilobits.
Modem........................ A device for transmitting digital information
                              over an analog telephone line.
NAP.......................... Network Access Point. A location at which ISPs
                              exchange each other's traffic.
On-line service.............. Commercial information services that offer a
                              computer user access to a specified slate of
                              information, entertainment, and communications
                              menus on what appears to be a single system.
</TABLE>    
 
                                       62
<PAGE>
 
<TABLE>
<S>                            <C>
Peering....................... The commercial practice under which nationwide
                               ISPs exchange each other's traffic without the
                               payment of settlement charges.
POP........................... Point of Presence. Telecommunications facility
                               through which the Company provides local
                               connectivity to its customers.
Router........................ A system placed between networks that relays
                               data to those networks based upon a destination
                               address contained in the data packets being
                               routed.
SLIP.......................... Serial Line Internet Protocol. An information
                               transfer standard for transmitting Internet
                               Protocol packets over asynchronous data
                               connections between two points.
TCP/IP........................ Transmission Control Protocol/Internet Protocol.
                               A suite of network protocols that allow
                               computers with different architectures and
                               operating system software to communicate with
                               other computers on the Internet.
UNIX.......................... A computer operating system for workstations and
                               PCs and noted for its portability and
                               communications functionality.
Web Site...................... A server connected to the Internet from which
                               Internet users can obtain information.
World Wide Web or Web......... A collection of computer systems supporting a
                               communications protocol that permits multi-media
                               presentation of information over the Internet.
</TABLE>
 
 
                                       63
<PAGE>
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Report of Independent Auditors............................................. F-2
Financial Statements
Balance Sheets............................................................. F-3
Statements of Operations................................................... F-4
Statements of Shareholders' Equity (Deficit)............................... F-5
Statements of Cash Flows................................................... F-6
Notes to Financial Statements.............................................. F-7
</TABLE>    
 
                                      F-1
<PAGE>
 
                        REPORT OF INDEPENDENT AUDITORS
 
The Board of Directors and Shareholders
DIGEX, Incorporated
   
  We have audited the accompanying balance sheets of DIGEX, Incorporated as of
December 31, 1994, December 31, 1995 and June 30, 1996, and the related
statements of operations, shareholders' equity (deficit), and cash flows for
each of the three years in the period ended December 31, 1995 and the six-
month periods ended June 30, 1995 and 1996. These financial statements are the
responsibility of the Company's management. Our responsibility is to express
an opinion on these financial statements based on our audits.     
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of DIGEX, Incorporated at
December 31, 1994, December 31, 1995 and June 30, 1996, and the results of its
operations and its cash flows for each of the three years in the period ended
December 31, 1995 and the six-month periods ended June 30, 1995 and 1996 in
conformity with generally accepted accounting principles.
                                             
                                          /s/ ERNST & YOUNG LLP     
 
Baltimore, Maryland
       
July 17, 1996
 
                                      F-2
<PAGE>
 
                              DIGEX, INCORPORATED
 
                                 BALANCE SHEETS
 
                                     ASSETS
 
<TABLE>   
<CAPTION>
                                 DECEMBER 31,
                              --------------------                  PRO FORMA
                                1994       1995     JUNE 30, 1996 JUNE 30, 1996
                              --------  ----------  ------------- -------------
                                                                   (UNAUDITED)
<S>                           <C>       <C>         <C>           <C>
Current assets:
Cash and cash equivalents...  $  2,441  $  832,582   $ 6,269,000   $ 6,269,000
Accounts receivable, less
 allowance of $0 in 1994,
 $50,000 in 1995 and
 $126,579 in 1996...........   141,488     908,572     1,416,891     1,416,891
Due from officers and
 employees..................    24,124         --         11,972        11,972
Inventory and prepaid
 expenses...................    41,926      49,631       825,172       825,172
Deferred income taxes.......    14,679       7,681         7,681         7,681
                              --------  ----------   -----------   -----------
   Total current assets.....   224,658   1,798,466     8,530,716     8,530,716
Property and equipment:
Computer equipment and
 software...................   431,415   3,439,014    10,959,400    10,959,400
Office furniture and
 equipment..................    20,630     152,805       203,908       203,908
Leasehold improvements......     8,871     163,811       287,705       287,705
                              --------  ----------   -----------   -----------
                               460,916   3,755,630    11,451,013    11,451,013
Accumulated depreciation and
 amortization...............   109,789     764,966     1,689,779     1,689,779
                              --------  ----------   -----------   -----------
                               351,127   2,990,664     9,761,234     9,761,234
Deferred financing costs....    77,857         --        245,218       245,218
Other assets................     1,500     262,656       304,611       304,611
                              --------  ----------   -----------   -----------
Total assets................  $655,142  $5,051,786   $18,841,779   $18,841,779
                              ========  ==========   ===========   ===========
                 LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
Current liabilities:
Accounts payable and accrued
 expenses...................  $208,329  $  959,528   $ 7,974,939   $ 7,974,939
Notes payable, net of
 discount of $13,734........   286,266         --            --            --
Deferred revenue............   153,049     389,472     5,076,393     5,076,393
Income taxes payable........    20,910         --            --            --
Current portion of capital
 lease obligations..........       --      858,765     1,497,563     1,497,563
10% Convertible Debentures,
 net of discount of $588,835
 in 1995....................       --    1,411,165           --            --
                              --------  ----------   -----------   -----------
   Total current
    liabilities.............   668,554   3,618,930    14,548,895    14,548,895
Deferred income taxes.......     6,998         --            --            --
Capital lease obligations,
 less current portion.......       --      821,709     1,714,283     1,714,283
Series A Mandatorily
 Redeemable Convertible
 Preferred Stock, $1 par
 value; 70,000 shares
 authorized; 45,455 shares
 issued and outstanding (pro
 forma: none); redemption
 price and liquidation
 preference of $100 per
 share, aggregating
 $4,545,500.................       --    2,138,889     2,391,770           --
Series B Mandatorily
 Redeemable Convertible
 Preferred Stock, $1 par
 value; 130,000 shares
 authorized; 81,263.89
 shares issued and
 outstanding (pro forma:
 none); redemption price and
 liquidation preference $100
 per share, aggregating
 $8,126,389.................       --          --      8,126,389           --
Shareholders' equity
 (deficit):
 Common stock, $.01 par
  value:
   Authorized shares 1,000
    shares in 1994 and
    49,800,000 in 1995 and
    1996....................
   Issued and outstanding
    shares 1,717,907 in
    1994; 1,617,907 in 1995
    and 1996 (pro forma:
    6,113,991)..............    17,179      16,179        16,179        61,140
 Additional paid-in
  capital...................    25,393   2,834,672     3,824,636    14,297,834
 Accumulated deficit........   (62,982) (4,378,593)  (11,780,373)  (11,780,373)
                              --------  ----------   -----------   -----------
Total shareholders' equity
 (deficit)..................   (20,410) (1,527,742)   (7,939,558)    2,578,601
                              --------  ----------   -----------   -----------
Total liabilities and
 shareholders' equity
 (deficit)..................  $655,142  $5,051,786   $18,841,779   $18,841,779
                              ========  ==========   ===========   ===========
</TABLE>    
 
                       See notes to financial statements.
 
                                      F-3
<PAGE>
 
                              DIGEX, INCORPORATED
 
                            STATEMENTS OF OPERATIONS
 
<TABLE>   
<CAPTION>
                                                                  SIX MONTHS
                             YEAR ENDED DECEMBER 31,            ENDED JUNE 30,
                         ---------------------------------  -----------------------
                           1993       1994        1995         1995        1996
                         --------  ----------  -----------  ----------  -----------
<S>                      <C>       <C>         <C>          <C>         <C>
Net Revenue:
  Online services....... $431,098  $1,577,609  $ 4,425,172  $1,594,440  $ 4,659,586
  Equipment sales.......      --          --       650,144      70,992      575,618
                         --------  ----------  -----------  ----------  -----------
                          431,098   1,577,609    5,075,316   1,665,432    5,235,204
Costs and Expenses:
  Data communications
   and operations.......  216,656   1,002,503    4,013,377   1,264,635    4,734,327
  Cost of equipment
   sales................      --          --       458,123      57,028      512,634
  Sales and marketing...   18,326     263,075    1,710,234     561,093    2,587,472
  General and
   administrative.......  135,238     366,392    2,715,752     588,116    3,376,091
                         --------  ----------  -----------  ----------  -----------
Total expenses..........  370,220   1,631,970    8,897,486   2,470,872   11,210,524
                         --------  ----------  -----------  ----------  -----------
Income (loss) from
 operations.............   60,878     (54,361)  (3,822,170)   (805,440)  (5,975,320)
Other income (expense):
  Interest and other
   income...............      --          --        72,002      17,453       47,746
  Interest expense......      --      (23,693)    (226,745)    (45,249)  (1,167,149)
                         --------  ----------  -----------  ----------  -----------
                              --      (23,693)    (154,743)    (27,796)  (1,119,403)
                         --------  ----------  -----------  ----------  -----------
Income (loss) before
 income taxes...........   60,878     (78,054)  (3,976,913)   (833,236)  (7,094,723)
Income taxes............  (25,540)     (3,470)         --          --           --
                         --------  ----------  -----------  ----------  -----------
Net income (loss).......   35,338     (81,524)  (3,976,913)   (833,236)  (7,094,723)
Accretion of Series A
 Mandatorily Redeemable
 Convertible Preferred
 Stock to redemption
 value..................      --          --      (338,698)   (109,163)    (252,881)
                         --------  ----------  -----------  ----------  -----------
Net income (loss)
 attributable to common
 shareholders........... $ 35,338  $  (81,524) $(4,315,611) $ (942,399) $(7,347,604)
                         ========  ==========  ===========  ==========  ===========
Net income (loss) per
 common share
 attributable to common
 shareholders........... $     --  $    (0.01) $     (0.63) $    (0.14) $     (0.98)
                         ========  ==========  ===========  ==========  ===========
Pro forma net loss per
 common share
 attributable to common
 shareholders...........                       $     (0.47)             $     (0.69)
                                               ===========              ===========
</TABLE>    
 
                       See notes to financial statements.
 
                                      F-4
<PAGE>
 
                              DIGEX, INCORPORATED
 
                  STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT)
 
<TABLE>   
<CAPTION>
                                           ADDITIONAL
                                  COMMON    PAID-IN   ACCUMULATED
                                   STOCK    CAPITAL     DEFICIT        TOTAL
                                  -------  ---------- ------------  -----------
<S>                               <C>      <C>        <C>           <C>
Balance at January 1, 1993......  $17,179  $      --  $    (16,796) $       383
Net income for 1993.............      --          --        35,338       35,338
                                  -------  ---------- ------------  -----------
Balance at December 31, 1993....   17,179         --        18,542       35,721
Issuance of 190,883 warrants to
 purchase common stock..........      --       25,393          --        25,393
Net loss for 1994...............      --          --       (81,524)     (81,524)
                                  -------  ---------- ------------  -----------
Balance at December 31, 1994....   17,179      25,393      (62,982)     (20,410)
Issuance of warrants to purchase
 1,120,000 shares of common
 stock, net of expenses of
 $262,756.......................      --    1,650,459          --     1,650,459
Issuance of warrants to purchase
 299,946 shares of common stock.      --      682,378          --       682,378
Value of vested common stock
 options granted to employees...      --      475,442          --       475,442
Accretion of Series A
 Mandatorily Redeemable
 Convertible Preferred Stock to
 redemption value...............      --          --      (338,698)    (338,698)
Retirement of 100,000 shares of
 common stock...................   (1,000)      1,000          --           --
Net loss for 1995...............      --          --    (3,976,913)  (3,976,913)
                                  -------  ---------- ------------  -----------
Balance at December 31, 1995....   16,179   2,834,672   (4,378,593)  (1,527,742)
Issuance of warrants to purchase
 166,378 shares of common stock.      --      361,872          --       361,872
Issuance of warrants to purchase
 240,000 shares of common stock.      --      228,000          --       228,000
Value of vested common stock
 options granted to employees...      --      400,092          --       400,092
Accretion of Series A
 Mandatorily Redeemable
 Convertible Preferred Stock to
 redemption value...............      --          --      (252,881)    (252,881)
Dividends accrued on Series B
 Mandatorily Redeemable
 Convertible Preferred Stock....      --          --       (54,176)     (54,176)
Net loss for six months ended
 June 30, 1996..................      --          --    (7,094,723)  (7,094,723)
                                  -------  ---------- ------------  -----------
Balance at June 30, 1996........  $16,179  $3,824,636 $(11,780,373) $(7,939,558)
                                  =======  ========== ============  ===========
</TABLE>    
 
                       See notes to financial statements.
 
                                      F-5
<PAGE>
 
                              DIGEX, INCORPORATED
 
                            STATEMENTS OF CASH FLOWS
 
<TABLE>   
<CAPTION>
                                                               FOR THE SIX MONTHS
                          FOR THE YEAR ENDED DECEMBER 31,        ENDED JUNE 30,
                          ---------------------------------  -----------------------
                            1993       1994        1995         1995        1996
                          ---------  ---------  -----------  ----------  -----------
<S>                       <C>        <C>        <C>          <C>         <C>
Operating activities:
Net income (loss).......  $  35,338  $ (81,524) $(3,976,913) $ (833,236) $(7,094,723)
Adjustments to reconcile
 net income (loss) to
 net cash provided by
 (used in) operating
 activities:
 Depreciation and
  amortization..........     22,158     83,948      655,177     154,707      924,813
 Amortization of debt
  discount charged to
  interest expense......        --      11,659      107,277      13,734      950,707
 Non-cash compensation
  recorded for vested
  stock option grants...        --         --       475,442         --       400,093
 Deferred income taxes..     17,859    (25,540)         --          --           --
 Changes in operating
  assets and liabilities:
  Accounts receivable...    (72,352)   (65,868)    (767,084)   (207,965)    (508,319)
  Inventory and prepaid
   expenses.............        --     (41,926)      (7,705)     39,915     (775,541)
  Cash overdraft........      4,347     (4,347)         --          --           --
  Accounts payable and
   accrued expenses.....     43,873    163,461      751,199     168,843    7,087,624
  Deferred revenue......     64,901     79,976      236,423      95,060    4,686,921
  Income taxes payable..      7,681     13,229      (20,910)    (20,910)         --
                          ---------  ---------  -----------  ----------  -----------
Net cash provided by
 (used in) operating
 activities.............    123,805    133,068   (2,547,094)   (589,852)   5,671,575
Investing activities:
Due from officers and
 employees..............    (22,670)    (6,222)      24,124      (1,500)     (11,972)
Purchase of property and
 equipment..............    (98,273)  (350,132)  (1,199,160)   (447,450)  (5,576,515)
Decrease (increase) in
 other assets...........     (5,084)     3,584     (261,156)   (143,338)     (41,955)
                          ---------  ---------  -----------  ----------  -----------
Net cash used in
 investing activities...   (126,027)  (352,770)  (1,436,192)   (592,288)  (5,630,442)
Financing activities:
Proceeds from issuance
 of (repayment of)
 notes notes payable and
 detachable stock
 warrants...............        --     300,000     (300,000)   (300,000)         --
Borrowings under
 revolving line of
 credit.................        --         --           --          --     1,166,745
Repayments under
 revolving line of
 credit.................        --         --           --          --    (1,166,745)
Repayment of capital
 leases.................        --         --      (415,080)    (77,235)    (587,497)
Proceeds from issuance
 of 10% Subordinated
 Debentures and
 detachable stock
 warrants...............        --         --     2,000,000         --     1,000,000
Proceeds from issuance
 of Series A Mandatorily
 Redeemable Convertible
 Preferred Stock and
 detachable stock
 warrants, net of
 expenses of issuance...        --         --     3,528,507   3,528,507          --
Proceeds from issuance
 of Series B Mandatorily
 Redeemable Convertible
 Preferred Stock........        --         --           --          --     5,000,000
Proceeds from issuance
 of warrants to purchase
 common stock to
 customer...............        --         --           --          --       228,000
Increase in deferred
 financing costs........        --     (77,857)         --          --      (245,218)
                          ---------  ---------  -----------  ----------  -----------
Net cash provided by
 financing activities...        --     222,143    4,813,427   3,151,272    5,395,285
                          ---------  ---------  -----------  ----------  -----------
Net increase (decrease)
 in cash and cash
 equivalents............     (2,222)     2,441      830,141   1,969,132    5,436,418
Cash and cash
 equivalents at
 beginning of period....      2,222        --         2,441       2,441      832,582
                          ---------  ---------  -----------  ----------  -----------
Cash and cash
 equivalents at end of
 period.................  $     --   $   2,441  $   832,582  $1,971,573  $ 6,269,000
                          =========  =========  ===========  ==========  ===========
</TABLE>    
                       See notes to financial statements.
 
                                      F-6
<PAGE>
 
                              DIGEX, INCORPORATED
 
                         NOTES TO FINANCIAL STATEMENTS
 
                                 JUNE 30, 1996
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
  Description of Business
   
  DIGEX, Incorporated (the "Company"), is a national Internet service
provider. The Company's principal customers are businesses, government
agencies and other institutional customers. The services provided by the
Company include business connectivity, Web server hosting, individual dial-up
network access, education services, and security and other network products.
    
  Use of Estimates
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.
 
  Cash Equivalents
 
  The Company considers all short-term, highly liquid investments with
maturities of three months or less when purchased to be cash equivalents.
 
  Inventory
 
  Inventory, consisting primarily of computer equipment, is stated at the
lower of the first-in, first-out cost, or market.
 
  Property and Equipment
 
  Property and equipment is stated at cost. Depreciation is computed for owned
assets using the straight-line method over estimated useful lives of five
years. Assets capitalized under capital leases are amortized using the
straight-line method over the lesser of the lease term or the useful life of
the asset.
 
  Deferred Financing Costs
 
  Deferred financing costs at December 31, 1994 consist of costs incurred in
1994 to obtain equity financing. These costs were capitalized in 1994 and
accounted for as a reduction of Series A Mandatorily Redeemable Convertible
Preferred Stock in 1995 upon the closing of the transaction (see Note 8).
Deferred financing costs at June 30, 1996 consist of direct costs incurred
related to the initial filing of a registration statement for the sale of
common stock with the Securities and Exchange Commission.
 
  Other Assets
 
  Other assets consist primarily of security deposits on leased computer
equipment and office furniture and equipment. The deposits will be applied
against the final months lease payments.
   
  Revenue Recognition & Accounts Receivable     
 
  The Company offers annual subscriptions to its customers for Internet access
and also may arrange for advance payments under contracts to deliver business
connectivity services. Advance
 
                                      F-7
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
   
payments for these services are deferred and recognized in the periods in
which the services are performed. Equipment sales are recognized upon
commencement of the related service. Receivables generally are due within 30
days. The Company does not generally require collateral from its customers.
    
       
  Advertising Costs
 
  The Company expenses advertising costs as incurred. Advertising expense
totaled approximately $3,100, $24,600 and $488,900 in 1993, 1994 and 1995,
respectively.
 
  Stock Options Granted to Employees
 
  The Company records compensation expense for all stock-based compensation
plans using the intrinsic value method prescribed by APB Opinion 25,
Accounting for Stock Issued to Employees. In October 1995, the Financial
Accounting Standards Board issued FASB Statement No. 123, Accounting for
Stock-Based Compensation, which encourages companies to recognize expense for
stock-based awards based on their estimated value on the date of grant.
Statement 123, effective for 1996, does not require companies to change their
existing accounting for stock-based awards, but if the new fair value method
is not adopted, pro forma income and earnings per share data should be
provided in the notes to the financial statements. The Company intends to
continue to account for stock-based compensation plans using the intrinsic
value method, and will supplementally disclose in its 1996 annual financial
statements the required pro forma information as if the fair value method had
been adopted.
 
  Income Taxes
 
  The Company uses the liability method in accounting for income taxes. Under
this method, deferred tax assets and liabilities are determined based on
differences between financial reporting and tax bases of assets and
liabilities and are measured using the enacted tax rates and laws that will be
in effect when the differences are expected to reverse.
 
  Interim Financial Data
 
  The financial statements of the Company for the six months ended June 30,
1995 and 1996 have been prepared on the same basis as the annual financial
statements and, in the opinion of management, include all adjustments
(consisting only of normal recurring adjustments) necessary to state fairly
the financial information set forth therein, in accordance with generally
accepted accounting principles.
 
  The results of operations for the six months ended June 30, 1996 are not
necessarily indicative of results expected for the full fiscal year.
 
                                      F-8
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
2. EARNINGS PER SHARE
 
  The following table summarizes the computations of share amounts used in the
computation of historical earnings (loss) per share presented in the
accompanying statements of operations (in thousands of shares):
 
<TABLE>   
<CAPTION>
                                                  YEAR ENDED       SIX MONTHS
                                                 DECEMBER 31,    ENDED JUNE 30,
                                               ----------------- ---------------
                                               1993  1994  1995    1995    1996
                                               ----- ----- ----- ------- -------
<S>                                            <C>   <C>   <C>   <C>     <C>
Weighted average number of shares of common
 stock outstanding during the period.........  1,718 1,718 1,708   1,618   1,618
Options and warrants to purchase common stock
 issued within one year of registration
 statement...................................  2,990 2,990 2,990   2,990   2,990
Convertible debentures and preferred stock
 issued within one year of registration
 statement...................................  2,180 2,180 2,180   2,180   2,180
                                               ----- ----- ----- ------- -------
Total common and common equivalent shares of
 stock considered outstanding during the
 year........................................  6,888 6,888 6,878   6,788   6,788
                                               ===== ===== ===== ======= =======
</TABLE>    
 
  Earnings (loss) per share is based upon the average number of shares of
common stock outstanding during each period. As required by the Securities and
Exchange Commission, all common stock warrants, options, convertible
debentures, and convertible preferred stock issued by the Company at exercise
prices or conversion rates below the expected public offering price during the
twelve-month period prior to the anticipated offering date have been included
in the computations as if they were outstanding for all periods presented. As
the Company expects the initial public offering price to exceed the exercise
prices or conversion rates for all securities issued after June 1995, all of
the securities issued between July 1, 1995 and the latest filing date have
been included in the computation of historical net income (loss) per common
share attributable to common shareholders.
 
  The assumed conversion of all other potentially dilutive securities (issued
prior to July 1995) is anti-dilutive for all years presented, and therefore is
not considered in the computations.
 
  Net loss per common share attributable to common shareholders for the six
months ended June 30, 1996 was reduced by $670,871 of interest expense
attributable to debentures converted into Series B Preferred Stock during the
period.
 
  Pro forma net loss per share is presented to disclose the additional effect
on loss per share for the year ended December 31, 1995 and for the six months
ended June 30, 1996 assuming that the antidilutive convertible securities
which are not included in the historical calculations and which will convert
into common stock upon the closing of the proposed initial public offering
were converted into common stock on January 1, 1995, or their issuance date,
whichever date is later. Historical net loss was reduced by $450,871 for the
year ended December 31, 1995 and $1,311,347 for the six months ended June 30,
1996 to adjust for interest expense and preferred stock accretion.
 
                                      F-9
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
  The following table summarizes the computations of share amounts used in the
computation of pro forma earnings (loss) per share presented in the
accompanying statements of operations (in thousands of shares):
 
<TABLE>   
<CAPTION>
                                                           PRO FORMA   PRO FORMA
                                                          DECEMBER 31, JUNE 30,
                                                              1995       1996
                                                          ------------ ---------
                                                               (UNAUDITED)
<S>                                                       <C>          <C>
Weighted average number of shares of common stock
 outstanding during the period..........................     1,708       1,618
Options and warrants to purchase common stock issued
 within one year of registration statement..............     2,990       2,990
Convertible debentures and preferred stock issued within
 one year of registration statement.....................     2,180       2,180
Pro forma conversion of preferred stock and warrants....     1,376       1,902
                                                             -----       -----
Total common and common equivalent shares of stock
 considered outstanding during the year.................     8,254       8,690
                                                             =====       =====
</TABLE>    
 
3. SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
 
<TABLE>
<CAPTION>
                                                                SIX MONTHS
                                 YEAR ENDED DECEMBER 31,      ENDED JUNE 30,
                                -------------------------- ---------------------
                                  1993   1994      1995       1995       1996
                                ------- ------------------ ---------- ----------
<S>                             <C>     <C>    <C>         <C>        <C>
Cash paid during the period
 for:
 Interest...................... $    -- $ --   $   105,100 $   45,200 $  118,700
 Taxes......................... $ 7,700 $ --   $       --  $      --  $      --
Non-cash investing and
 financing activities:
 Equipment acquired under
  capital lease................ $   --  $ --   $ 2,095,600 $1,048,300 $2,118,900
 Conversion of 10% Convertible
  Debentures and accrued
  interest into Series B
  Mandatorily Redeemable
  Convertible Preferred Stock.. $   --  $ --   $       --  $      --  $3,126,400
</TABLE>
 
4. NOTES PAYABLE
   
  In July 1994, the Company received $300,000 in connection with the issuance
of notes with a face value of $300,000 and detachable stock warrants to
purchase 190,883 shares of common stock for $1.58 per share. The portion of
the proceeds allocable to the warrants of $25,393, as estimated by the
Company, was accounted for as additional paid-in capital. The notes were
repaid in conjunction with the issuance of the Series A Mandatorily Redeemable
Convertible Preferred Stock in March 1995.     
 
5. BORROWINGS UNDER LINE OF CREDIT
   
  In April 1996, the Company entered into a loan agreement with a bank that
provides a revolving line of credit secured by accounts receivable. The credit
line allows the Company to borrow a maximum of $1.5 million, subject to
restrictions based on the available collateral, and expires on February 28,
1997. The credit line bears interest at a floating rate equal to the bank's
prime rate plus 1% per annum. In connection with this credit line, the Company
is required to comply with certain financial ratios and covenants. At June 30,
1996, the Company did not have any borrowings outstanding under this facility.
    
                                     F-10
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
6. CAPITAL LEASE OBLIGATIONS
 
  The Company leases equipment under capital leases. Property and equipment
includes the following amounts for leases that have been capitalized at June
30, 1996:
 
<TABLE>
<CAPTION>
                                                 DECEMBER 31, 1995 JUNE 30, 1996
                                                 ----------------- -------------
<S>                                              <C>               <C>
Computer equipment..............................    $1,985,436      $4,033,066
Office furniture and equipment..................       110,118         110,118
                                                    ----------      ----------
                                                     2,095,554       4,143,184
Less accumulated amortization...................       444,683         940,616
                                                    ----------      ----------
                                                    $1,650,871      $3,202,568
                                                    ==========      ==========
</TABLE>
 
  Amortization of leased assets is included in depreciation and amortization
expense.
 
  Future minimum payments under capital lease obligations consist of the
following at June 30, 1996:
 
<TABLE>
<S>                                                                  <C>
Through December 31, 1996........................................... $  885,376
1997................................................................  1,508,220
1998................................................................    903,432
1999................................................................    293,147
2000................................................................      1,333
                                                                     ----------
Total minimum lease payments........................................  3,591,508
Amounts representing interest.......................................    379,662
                                                                     ----------
Present value of net minimum lease payments (including current por-
 tion of $1,497,563)................................................ $3,211,846
                                                                     ==========
</TABLE>
 
7. 10% CONVERTIBLE DEBENTURES AND DETACHABLE STOCK WARRANTS
 
  On November 28, 1995, the Company issued $2,000,000 of 10% Convertible
Debentures with detachable stock warrants for cash proceeds of $2,000,000. The
debentures were due on June 1, 1996. As discussed more fully in Note 9, in May
1996 the holders of the 10% Convertible Debentures converted their debentures
into shares of Series B Preferred Stock.
   
  The detachable stock warrants entitle the holders to purchase 299,946 shares
of common stock at an exercise price of $0.25 per share and expire in November
2001. The exercise price is payable either in cash or through the retirement
of stock warrants. The warrants were valued at $682,378, or $2.28 per share,
based on an independent valuation of the Company's common stock and the use of
a generally accepted warrant valuation methodology. The estimated value of the
warrants was recorded as additional paid-in capital and the 10% Convertible
Debentures have been recorded net of a discount of $682,378. The Company
recognized interest expense of $93,543 and $588,835 for the year ended
December 31, 1995 and the six months ended June 30, 1996, respectively,
related to the amortization of this discount.     
   
  On February 15, 1996, the Company issued $1,000,000 of 10% Convertible
Debentures with detachable stock warrants for cash proceeds of $1,000,000. The
debentures have terms identical to those issued in November 1995, and were
also converted into Series B Preferred Stock in May 1996. The detachable stock
warrants entitle the holders to purchase 166,378 shares of common stock at an
exercise price of $0.25 per share and expire in February 2002. The exercise
price is payable either in     
 
                                     F-11
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
   
cash or through the retirement of stock warrants. The warrants were valued at
$361,872, or $2.17 per share, based on an independent valuation of the
Company's common stock and the use of a generally accepted warrant valuation
methodology. The estimated value of the warrants was recorded as additional
paid-in capital and the 10% Convertible Debentures have been recorded net of a
discount of $361,872. The Company recognized interest expense of $361,872 the
period from February 15, 1996 through June 30, 1996 related to the
amortization of this discount.     
 
8. SERIES A MANDATORILY REDEEMABLE CONVERTIBLE PREFERRED STOCK AND DETACHABLE
STOCK WARRANTS
 
  The Company has authorized the issuance of 200,000 shares of Series A
Mandatorily Redeemable Convertible Preferred Stock ("Series A"). In March and
April 1995, the Company issued 45,455 shares of Series A with detachable stock
warrants for cash proceeds of $4,000,000. Dividends on the Series A are
cumulative at an annual rate of $6 per share beginning March 15, 1997 and $10
per share beginning March 15, 1999.
   
  The detachable stock warrants entitle the holders to purchase 1,120,000
shares of common stock for an aggregate exercise price of $100 and expire six
years from the date of the final redemption of the Series A. The warrants were
valued at $1,913,215, or $1.71 per share, based on an estimate at the date of
the transaction of the relative values of the Series A and the warrants. The
costs of the issuance of $549,350 have been deducted proportionately from the
proceeds allocated to the warrants and the Series A.     
 
  The Series A was recorded at estimated fair value on the date of issuance,
less issue costs. The excess of the redemption value over the carrying value
is being accreted by periodic charges to retained earnings over the life of
the issue using the interest method.
   
  The Company must redeem the Series A in 24 equal monthly installments of
1,894 shares commencing January 1, 2000 at a redemption price of $100 per
share plus any accrued and unpaid dividends. The Company may, at its option,
redeem at any time all, but not less than all, of the Series A for $100 per
share plus any accrued and unpaid dividends. If the Company redeems the Series
A prior to March 15, 1997, the redemption price will be reduced, but in no
event will the redemption price be less than $88 per share. The Series A is
also convertible at any time into 500,000 shares of common stock based on a
conversion rate defined in the Amended and Restated Articles of Incorporation.
The Series A will automatically convert into 500,000 shares of common stock
immediately prior to the closing of an initial public offering consummated on
or before December 31, 1996 generating net proceeds to the Company of at least
$25 million.     
 
  Each share of Series A has substantially the same voting rights as the
number of shares of common stock into which it can be converted, as provided
for in the Amended and Restated Articles of Incorporation. The holders of the
Series A (in conjunction with the holders of the Series B Preferred Stock
issued in May 1996 as discussed in Note 9) independently appoint three
directors to the Board of Directors. In the event the Company fails to meet
its obligations to the holders of the Series A under the aforementioned
redemption provisions or upon certain other events, the holders of the
preferred stock are entitled to elect a majority of the directors of the Board
of Directors.
   
  In connection with the issuance of the Series A, the Company also issued
warrants to purchase 91,200 shares of common stock with an exercise price of
$2.63 per share to investment bankers. These warrants expire in March 2002.
    
                                     F-12
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
9. SERIES B MANDATORILY REDEEMABLE CONVERTIBLE PREFERRED STOCK
 
  In May 1996, the Company amended its Articles of Incorporation to authorize
the issuance of 130,000 shares of Series B Preferred Stock ("Series B") with a
par value of $1. Cumulative annual cash dividends on the Series B at the rate
of $8 per share become payable monthly commencing on the first date
outstanding through March 15, 1999, and after March 15, 1999, at the rate of
$12 per share per annum.
 
  The Company must redeem the Series B in monthly installments of 3,387 shares
beginning January 1, 2001 at $100 per share plus any unpaid dividends or,
immediately, if certain events specified in the Articles of Incorporation
occur and holders of 63% of the shares of Series B vote for redemption. In
addition, at any time after the earlier of May 24, 1999 or the date on which
all shares of Series A Preferred Stock have been redeemed, the holders of the
Series B may require the Company to redeem their shares at the greater of $200
per share or fair market value, as determined by an independent investment
banking firm. Each share of Series B is convertible at the option of the
holder at any time after issuance into 33.54 shares of common stock. The
Series B holders have the same voting rights as the holders of common stock,
assuming conversion.
   
  On May 30, 1996, the Company issued 50,000 shares of Series B for $5
million. The Series B will automatically convert into 1,341,515 shares of
common stock immediately prior to the closing of an initial public offering
consummated on or before December 31, 1996 generating net proceeds to the
Company of at least $25 million.     
 
  In connection with the issuance of the Series B, the holders of the 10%
Convertible Debentures (face value of $3 million, plus accrued interest of
$126,000) converted the debentures into 31,264 shares of Series B.
 
10. COMMON STOCK
   
  In March 1995, the Company amended and restated the Articles of
Incorporation to authorize the issuance of 49,800,000 shares of $.01 par value
common stock and 200,000 shares of $1 par value Series A Mandatorily
Redeemable Convertible Preferred Stock with a redemption price and liquidation
value of $100 per share. In conjunction with the amendment, the Board of
Directors approved a 505.26-for-1 stock split, effected in the form of a stock
dividend. In August 1995, the Board of Directors approved a 10-for-1 stock
split, also effected in the form of a stock dividend. And finally, in July
1996, the Board of Directors approved a 1-for-2.5 reverse stock split pursuant
to the Company's initial public offering of common stock. All share and per
share amounts in the accompanying financial statements have been restated to
retroactively reflect all splits.     
 
11. AGREEMENT WITH CUSTOMER
   
  In June 1996, the Company entered into a six-year private network agreement
with WinStar Communications, Inc. As part of the agreement, WinStar will
purchase $5 million of connectivity services which was paid in advance in June
1996. WinStar also received warrants to purchase 240,000 shares of common
stock for $3.75 per share. The warrants were valued at $228,000, or $0.95 per
share, based on independent valuation of the Company's common stock and the
use of a generally accepted warrant valuation methodology. The estimated value
of the warrants was recorded as additional paid-in capital of $228,000 and
deferred revenue associated with the contract was recorded in the amount of
$4,772,000.     
 
 
                                     F-13
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
12. SHARES RESERVED FOR FUTURE ISSUANCE
   
  The Company as of June 30, 1996 has reserved 6,844,244 shares of common
stock for future issuance upon the conversion of the Series A and Series B
Mandatorily Redeemable Convertible Preferred Stock, the exercise of all
outstanding stock purchase warrants, and the exercise of all outstanding stock
options.     
 
13. STOCK OPTION PLAN
   
  In 1995, the Company approved and adopted its 1995 Stock Option Plan (the
"Plan"). In 1996, the Company approved and adopted its 1996 Equity
Participation Plan. The Plans are administered by the Board of Directors. The
Plans provides for the granting of either qualified or non-qualified options
to purchase an aggregate of up to 2,500,480 shares of common stock to eligible
employees, officers, directors and consultants of the Company. The 1996 Equity
Participation also provides for the granting of other equity participation
instruments.     
 
  The following table summarizes the stock option activity of the Company:
 
<TABLE>   
<CAPTION>
                                           SHARES                EXERCISE PRICE
                                         OUTSTANDING EXERCISABLE   PER SHARE
                                         ----------- ----------- --------------
<S>                                      <C>         <C>         <C>
Balances at January 1, 1995.............        --         --         --
 Granted................................    632,280        --        $0.25
 Became exercisable.....................        --     188,280       $0.25
 Exercised/Surrendered
 Canceled...............................     (2,050)       --        $0.25
                                          ---------    -------   --------------
Balances at December 31, 1995...........    630,230    188,280       $0.25
 Granted................................  1,438,120        --    $0.25 - $10.00
 Became exercisable.....................        --     111,553       $0.25
 Exercised/Surrendered
 Canceled...............................    (12,850)       --        $0.25
                                          ---------    -------   --------------
Balances at June 30, 1996...............  2,055,500    299,833   $0.25 - $10.00
                                          =========    =======   ==============
</TABLE>    
   
  All of the options granted through June 30, 1996 are non-qualified stock
options and vest over 3 or 4 years. At the dates of grant, the estimated fair
value of a share of the Company's common stock ranged from $2.28 to $10.00.
The Company will record compensation expense of $4,660,195 over the vesting
period of the options. For the year ended December 31, 1995 and the six months
ended June 30, 1996, the Company recorded $475,442 and $400,092 of
compensation expense, respectively. The Company will record additional
compensation expense related to option grants through June 30, 1996 as
follows:     
 
<TABLE>   
<S>                                                                  <C>
Six months ended December 31, 1996.................................. $  775,016
Year ended December 31, 1997........................................  1,414,152
1998................................................................  1,194,619
1999................................................................    400,874
                                                                     ----------
  Total............................................................. $3,784,661
                                                                     ==========
</TABLE>    
 
14. FAIR VALUES OF FINANCIAL INSTRUMENTS
 
  The Series A and Series B Mandatorily Redeemable Convertible Preferred Stock
will automatically convert into common stock upon the expected closing of an
initial public offering in August 1996. Upon conversion, the securities will
not be considered financial instruments.
 
                                     F-14
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
15. INCOME TAXES
 
  The tax provisions for the six months ended June 30, 1995 and 1996 are based
on the estimated annual effective tax rate applicable for the full years.
 
  Significant components of the Company's deferred tax assets and liabilities
are as follows:
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                          ---------------------
                                                            1994       1995
                                                          --------  -----------
<S>                                                       <C>       <C>
Deferred tax liability:
 Tax over book depreciation.............................. $  6,998  $    49,581
Deferred tax assets:
 Net operating loss carryforward.........................   32,402    1,382,447
 Allowance for doubtful accounts.........................      --        19,310
 Stock option compensation expense.......................      --       183,615
 Accrued bonuses.........................................      --        23,172
                                                          --------  -----------
Total deferred tax assets................................   32,402    1,608,544
                                                          --------  -----------
Net future income tax benefit............................   25,404    1,558,963
Valuation allowance for net deferred tax assets..........  (17,723)  (1,551,282)
                                                          --------  -----------
Net deferred tax assets.................................. $  7,681  $     7,681
                                                          ========  ===========
</TABLE>
 
  As of December 31, 1995, the Company had net operating loss carryforwards of
$3.6 million. These carryforwards expire in 2009 and 2010. The amount
available to be used in any given year will be limited by operation of certain
provisions of the Internal Revenue Code.
 
  Income tax expense (benefit) consisted of the following:
 
<TABLE>
<CAPTION>
                                                       YEAR ENDED DECEMBER 31
                                                       --------------------------
                                                          1993     1994    1995
                                                       -------- --------  -------
<S>                                                    <C>      <C>       <C>
Current:
 Federal.............................................. $  5,237 $ 22,250  $ --
 State................................................    2,444    6,760    --
                                                       -------- --------  -----
                                                          7,681   29,010    --
Deferred (benefit):
 Federal..............................................   14,622  (20,911)   --
 State................................................    3,237   (4,629)   --
                                                       -------- --------  -----
                                                         17,859  (25,540)   --
                                                       -------- --------  -----
                                                       $ 25,540 $  3,470  $ --
                                                       ======== ========  =====
</TABLE>
 
  The Company's provision for income taxes resulted in effective tax rates
that varied from the statutory federal income tax rate as follows:
 
<TABLE>
<CAPTION>
                                                   1993     1994       1995
                                                  ------- --------  -----------
<S>                                               <C>     <C>       <C>
Expected federal income tax (benefit) at 34%..... $20,699 $(26,538) $(1,352,150)
State income taxes, net of federal benefit.......   2,813   (3,606)    (183,733)
Expenses not deductible for tax purposes.........   2,028    4,357        3,602
Effect of valuation allowance....................     --    17,723    1,533,559
Other............................................     --    11,534       (1,278)
                                                  ------- --------  -----------
Total............................................ $25,540 $  3,470  $       --
                                                  ======= ========  ===========
</TABLE>
 
 
                                     F-15
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
16. OPERATING LEASES
 
  The Company leases certain office space and equipment under noncancelable
operating leases that expire in various years through 2000. Future minimum
payments under noncancelable operating leases with initial terms of one year
or more consisted of the following at December 31, 1995:
 
<TABLE>       
     <S>                                                             <C>
     1996........................................................... $  531,665
     1997...........................................................    504,723
     1998...........................................................    485,930
     1999...........................................................    314,931
     2000...........................................................    205,184
                                                                     ----------
     Total minimum lease payments................................... $2,042,433
                                                                     ==========
</TABLE>    
 
  Rental expense consisted of the following:
 
<TABLE>
<CAPTION>
                                                        1993    1994     1995
                                                       ------- ------- --------
<S>                                                    <C>     <C>     <C>
Office and storage.................................... $18,882 $19,200 $123,749
Furniture and equipment...............................   4,037  28,915  133,889
                                                       ------- ------- --------
                                                       $22,919 $48,115 $257,638
                                                       ======= ======= ========
</TABLE>
 
17. EMPLOYEE BENEFIT PLAN
 
  The Company established a defined contribution benefit plan effective July
1, 1995. The plan covers substantially all employees who have three months of
service with the Company or who were employed by the Company on July 1, 1995.
Participants may contribute from 1% to 15% of their annual compensation to the
plan. In addition, the Company may make discretionary profit-sharing
contributions to the plan. No contributions were made by the Company during
1995.
   
18. PRO FORMA BALANCE SHEET     
   
  In connection with the issuance of the Series B, the holders of warrants to
purchase 1,868,408 shares of common stock agreed to exercise their warrants
immediately prior to the closing of an initial public offering consummated on
or before December 31, 1996 that generates net proceeds to the Company of at
least $25 million.     
   
  In June 1996 the Board of Directors approved the filing of a registration
statement for the sale of common stock with the Securities and Exchange
Commission that, upon closing, would meet the criteria for the automatic
exercise of warrants to purchase 1,868,408 shares of common stock, and the
conversion of the outstanding Series A Preferred Stock and Series B Preferred
Stock, all into common stock.     
 
                                     F-16
<PAGE>
 
                              DIGEX, INCORPORATED
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
  The following table summarizes the components of the pro forma balance sheet
(in thousands):
 
<TABLE>   
<CAPTION>
                                                            ASSUMED
                                              HISTORICAL  CONVERSION    TOTAL
                                               JUNE 30,  OF SECURITIES   PRO
                                                 1996      UPON IPO     FORMA
                                              ---------- ------------- --------
<S>                                           <C>        <C>           <C>
                                ASSETS
Current assets:
 Cash and cash equivalents...................  $  6,269     $   --     $  6,269
 Other current assets........................     2,262         --        2,262
                                               --------     -------    --------
Total current assets.........................     8,531         --        8,531
Property and equipment, net..................     9,761         --        9,761
Other noncurrent assets......................       550         --          550
                                               --------     -------    --------
Total assets.................................  $ 18,842     $   --     $ 18,842
                                               ========     =======    ========
                 LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
 Accounts payable and accrued expenses.......  $  7,975     $   --     $  7,975
 Other current liabilities...................     6,574         --        6,574
                                               --------     -------    --------
Total current liabilities....................    14,549         --       14,549
Capital lease obligations....................     1,714         --        1,714
Series A Preferred Stock.....................     2,392      (2,392)        --
Series B Preferred Stock.....................     8,126      (8,126)        --
Shareholders' equity:
 Common stock................................        16          45          61
 Additional paid-in capital..................     3,825      10,473      14,298
 Accumulated deficit.........................   (11,780)        --      (11,780)
                                               --------     -------    --------
Total shareholders' equity...................    (7,939)     10,518       2,579
                                               --------     -------    --------
Total liabilities and shareholders' equity...  $ 18,842     $    --    $ 18,842
                                               ========     =======    ========
</TABLE>    
 
                                      F-17
<PAGE>
 
NO DEALER, SALESPERSON OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY IN-
FORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND, IF GIVEN
OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED BY THE COMPANY OR ANY OF THE UNDERWRITERS. NEITHER THE DELIV-
ERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUM-
STANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS
OF THE COMPANY SINCE THE DATES AS OF WHICH INFORMATION IS GIVEN IN THIS PRO-
SPECTUS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER OR SOLICITATION BY ANY-
ONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED
OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO
DO SO OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION.
 
                               ----------------
 
                               TABLE OF CONTENTS
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Additional Information....................................................    3
Reports to Stockholders...................................................    3
Prospectus Summary........................................................    4
Risk Factors..............................................................    8
Use of Proceeds...........................................................   16
Dilution..................................................................   16
Capitalization............................................................   17
Dividend Policy...........................................................   18
Selected Financial and Pro Forma
 Financial Data...........................................................   19
Management's Discussion and Analysis of Financial Condition and Results of
 Operations...............................................................   20
Business..................................................................   26
Management................................................................   36
Certain Transactions......................................................   43
Principal Stockholders....................................................   45
Capital Stock of the Company..............................................   46
Shares Eligible for Future Sale...........................................   48
Underwriting..............................................................   49
Legal Matters.............................................................   49
Experts...................................................................   50
Glossary..................................................................   50
Index to Financial Statements.............................................  F-1
</TABLE>    
 
UNTIL      , 1996 (25 DAYS AFTER THE COMMENCEMENT OF THE OFFERING), ALL
DEALERS EFFECTING TRANSACTIONS IN THE COMMON STOCK, WHETHER OR NOT
PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS.
THIS REQUIREMENT IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A
PROSPECTUS WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD
ALLOTMENTS OR SUBSCRIPTIONS.
   
3,750,000 SHARES     
 
DIGEX, INCORPORATED
 
COMMON STOCK
($.01 PAR VALUE)
 
[LOGO OF DIGEX BUSINESS INTERNET APPEARS HERE]
 
SALOMON BROTHERS INC
 
MONTGOMERY SECURITIES
 
PROSPECTUS
 
DATED     , 1996
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 24. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
   
  The Amended and Restated Certificate of Incorporation of DIGEX, Incorporated
(the "Registrant" or "Company"), as amended (the "Amended and Restated
Certificate of Incorporation"), provides that the Registrant shall indemnify
to the fullest extent permitted by Section 145 of the General Corporation Law
of the State of Delaware (the "Delaware Law") any person whom it may indemnify
thereunder. The By-laws of the Registrant provide that indemnification shall
be made by the Registrant only upon a determination that indemnification is
proper in the circumstances because the individual met the applicable standard
of conduct. Advances for such indemnification may be made pending such
determination upon receipt of an undertaking by the director or officer to
repay all amounts so advanced in the event that it shall ultimately be
determined that such director or officer is not entitled to be indemnified by
the Registrant. In addition, the Amended and Restated Certificate of
Incorporation provides for the limitation to the extent permitted by the
Delaware Law of personal liability of directors to the Registrant and its
stockholders for monetary damages for breach of fiduciary duty as directors of
the Registrant.     
   
  The Company is obtaining a directors' and officers' insurance and company
reimbursement policy in the amount of $5,000,000. The policy insures directors
and officers against unindemnified loss arising from certain wrongful acts in
their capacities and reimburses the Registrant for such loss for which the
Registrant has lawfully indemnified its directors and officers. The policy
contains various exclusions, none of which will relate to the offering
hereunder.     
 
ITEM 25. OTHER EXPENSES OF ISSUANCES AND DISTRIBUTION.
 
  The following table sets forth the fees and expenses in connection with the
issuance and distribution of the securities being registered hereunder. Except
for the SEC registration fee and the NASD fee, all amounts are estimates.
 
<TABLE>     
   <S>                                                             <C>
   SEC Registration Fee........................................... $  18,965.52
   NASD Filing Fee................................................     6,000.00
   Printing and Engraving Expenses................................   200,000.00
   Legal Fees and Expenses........................................   300,000.00
   Accounting Fees and Expenses...................................   200,000.00
   Blue Sky Fees and Expenses.....................................    19,125.00
   Directors' and Officers' Insurance.............................   200,000.00
   Miscellaneous Expenses.........................................     5,909.48
                                                                   ------------
      Total....................................................... $ 950,000.00
                                                                   ============
</TABLE>    
 
ITEM 26. RECENT SALES OF UNREGISTERED SECURITIES
       
          
  The Company was incorporated on January 8, 1990 by Mr. Humphrey and Mr.
Doughney (the "Founders"). Mr. Humphrey contributed certain computer hardware
to the Company in exchange for 970,744 shares of Common Stock, and Mr.
Doughney contributed certain computer software to the Company in exchange for
647,163 shares of Common Stock.     
   
  On July 1, 1994, Robert M. Stewart, a director of the Company, and six other
individuals who are not affiliated with the Company loaned the Company
$300,000 in cash. In consideration for their loan, the Company issued to these
individuals (i) 8% promissory notes (the "Bridge Notes") in aggregate
principal amount of $300,000 and (ii) warrants to purchase 190,883 shares of
the Common Stock (the "Bridge Warrants"). The Bridge Notes were to mature on
the earlier of July 12, 1995 and the date on which certain payments were made
under the Securities Purchase Agreement.     
 
                                     II-1
<PAGE>
 
   
  On March 24, 1995, the Company entered into the Securities Purchase
Agreement with the Founders and Grotech IV, Venrock and Southern, pursuant to
which the Company issued a total of 45,454.54 shares of convertible preferred
stock (since redesignated Series A Convertible Preferred Stock), par value
$1.00 per share, together with warrants to purchase 1,120,000 shares of Common
Stock of the Company, for an aggregate cash investment of $4,000,000. The
Bridge Notes were repaid at their face amount with a portion of the proceeds
of this investment. Grotech IV was issued 18,181.82 shares of Series A
Preferred Stock and warrants to purchase 448,000 shares of Common Stock in
consideration of its investment of $1.6 million in cash, Venrock was issued
15,909.09 shares of Series A Preferred Stock (4,925.83 shares of which were
assigned to Venrock II) and warrants to purchase 392,000 shares of Common
Stock (121,348 of which were assigned to Venrock II) in consideration of its
investment of $1.4 million in cash and Southern was issued 11,363.63 shares of
Series A Preferred Stock and warrants to purchase 280,000 shares of Common
Stock in consideration of its investment of $1.0 million in cash.
Representatives of each of Grotech IV, Venrock and Southern were elected to
the Company's Board of Directors pursuant to the Securities Purchase
Agreement.     
   
  As a fee for arranging the above investment, the Company made a cash payment
of $200,000 and issued warrants to purchase 91,200 shares of Common Stock to
Mr. Stewart and nine other individuals (the "Fee Warrants" and, together with
the Bridge Warrants, the "Initial Warrants"). These individuals (other than
Mr. Stewart) are not affiliated with the Company.     
   
  Pursuant to a Stockholders Agreement (the "Stockholders Agreement"), dated
March 24, 1995, by and among the Company, Grotech IV, Venrock, Southern, Mr.
Humphrey and Mr. Doughney, the parties thereto agreed to grant rights of first
refusal to the other parties to such agreement in the event of the death,
disability or termination of employment of either Mr. Humphrey or Mr. Doughney
or in the event that either Mr. Humphrey or Mr. Doughney wishes to transfer
any of their shares of Common Stock of the Company. The provisions of the
Stockholders Agreement will terminate effective immediately prior to
consummation of the Offering.     
   
  On November 28, 1995, Grotech IV, Venrock, Southern and Venrock Associates
II, L.P. ("Venrock II" and, together with Grotech IV, Venrock and Southern,
the "Investors") loaned to the Company $800,000, $483,307, $500,000 and
$216,693 in cash, respectively. In consideration of these loans, the Company
issued 10% promissory notes due June 1, 1996 in the principal amount of
$2,000,000 (the "November 1995 Notes") and warrants to purchase 299,946 shares
of Common Stock to Grotech IV, Venrock, Venrock II and Southern as follows:
Grotech IV purchased promissory notes in the principal amount of $800,000 and
warrants to purchase 119,978 shares of Common Stock; Venrock purchased
promissory notes in the amount of $483,307 and warrants to purchase 72,483
shares of Common Stock; Venrock II purchased promissory notes in the principal
amount of $216,693 and warrants to purchase 32,498 shares of Common Stock; and
Southern purchased promissory notes in the principal amount of $500,000 and
warrants to purchase 74,987 shares of Common Stock.     
   
  On February 23, 1996, the Company issued additional 10% promissory notes due
June 1, 1996 in the principal amount of $1,000,000 (the "February 1996 Notes")
and additional warrants to purchase 166,378 shares of Common Stock to the
Investors as follows: Grotech IV purchased promissory notes in the principal
amount of $400,000 and warrants to purchase 66,551 shares of Common Stock for
a cash purchase price of $400,000; Venrock purchased promissory notes in the
principal amount of $217,000 and warrants to purchase 36,104 shares of Common
Stock for a cash purchase price of $217,000; Venrock II purchased promissory
notes in the principal amount of $133,000 and warrants to purchase 22,128
shares of Common Stock for a cash purchase price at $133,000; and Southern
purchased promissory notes in the principal amount of $250,000 and warrants to
purchase 41,595 shares of Common Stock for a cash purchase price of $250,000.
       
  On May 21, 1996, the Company issued additional promissory notes in the
principal amount of $1,000,000 (the "Convertible Notes") convertible into
shares of Series B Preferred Stock of the     
 
                                     II-2
<PAGE>
 
   
Company to the Investors as follows: Grotech IV purchased promissory notes in
the principal amount of $400,000 for a cash purchase price of $400,000;
Venrock purchased promissory notes in the principal amount of $217,000 for a
cash purchase price of $217,000; Venrock II purchased promissory notes in the
principal amount of $133,000 for a cash purchase price of $133,000; and
Southern purchased promissory notes in the principal amount of $250,000 for a
cash purchase price of $250,000.     
   
  On May 30, 1996, the Company, the Founders, the Investors, Grotech Partners,
Grotech Companion, Grotech Pennsylvania, Blue Chip and Crisler Capital
Company, Limited Partnership (together with the Investors, Grotech Partners,
Grotech Companion, Grotech Pennsylvania and Blue Chip, the "Purchasers")
entered into the Purchase and Exchange Agreement, whereby the Investors
exchanged $2.0 million principal amount of November 1995 Notes and $1.0
million principal amount February 1996 Notes (together with the right to
receive $126,389 in accrued interest thereon from the date of issuance) for
31,263.89 shares of Series B Convertible Preferred Stock of the Company, par
value $1.00 per share (the "Series B Preferred Stock"), and converted $1.0
million principal amount of Convertible Notes, in accordance with their terms,
into 10,000 shares of Series B Preferred Stock. In addition, the Purchasers
paid $4,000,000 in cash in exchange for a further 40,000 shares of Series B
Preferred Stock. The above-referenced exchange, conversion, and purchase
resulted in the following acquisitions of Series B Preferred Stock: Grotech IV
acquired 22,505.56 shares of Series B Preferred Stock; Grotech Partners
acquired 8,537 shares of Series B Preferred Stock; Grotech Companion acquired
930 shares of Series B Preferred Stock; Grotech Pennsylvania acquired 533
shares of Series B Preferred Stock; Venrock acquired 10,914.77 shares of
Series B Preferred Stock; Venrock II acquired 5,860.92 shares of Series B
Preferred Stock. Southern acquired 11,982.64 shares of Series B Preferred
Stock; Blue Chip acquired 16,000 shares of Series B Preferred Stock; and
Crisler acquired 4,000 shares of Series B Preferred Stock.     
   
  The transactions of May 21 and May 30, 1996 are collectively referred to
herein as the "1996 Venture Financing." A representative of Blue Chip holds a
seat on the Company's Board of Directors pursuant to the terms of the Purchase
and Exchange Agreement. The rights of representatives of each of Grotech IV,
Venrock and Southern, as well as each of the Founders, to have seats on the
Company's Board of Directors, granted pursuant to the Securities Purchase
Agreement, were restated in the Purchase and Exchange Agreement. In addition,
pursuant to the Purchase and Exchange Agreement, Crisler obtained the right to
designate a representative (R. Dean Meiszer) to act as an observer at meetings
of the Company's Board of Directors. Such stockholders' rights to designate
Directors or representatives to attend board meetings under the Purchase and
Exchange Agreement will terminate effective immediately prior to consummation
of the Offering. See "Management--Board Composition."     
   
  The holders of all outstanding shares of Series A Preferred Stock and Series
B Preferred Stock have agreed to convert their outstanding shares of Series A
Preferred Stock and Series B Preferred Stock, in accordance with their
respective terms, into 2,680,336 shares of Common Stock at or prior to the
consummation of the Offering (the "Preferred Stock Conversion"). As of the
date hereof, each share of Series A Preferred Stock is convertible into
approximately 11.0 shares of Common Stock and each share of Series B Preferred
Stock is convertible into approximately 26.83 shares of Common Stock. In
addition, all holders of warrants to purchase Common Stock (other than WinStar
and one holder of Initial Warrants) will exercise such warrants to purchase
1,868,408 shares of Common Stock upon consummation at or prior to the Offering
(the "Warrant Exercise").     
   
  In June 1996, the Company entered into a multi-year private network
agreement with WinStar. As part of the agreement, WinStar advanced $5,000,000
to the Company for connectivity services and received warrants to purchase
240,000 shares of Common Stock.     
 
                                     II-3
<PAGE>
 
  No underwriters were involved in any of the foregoing transactions. The
sales of all such securities were deemed to be exempt from registration under
the Act, in reliance on Section 4(2) thereunder, as transactions by an issuer
not involving any public offering.
   
  Since September 18, 1995, the Company at various times has granted options
to purchase shares of Common Stock of the Company to certain Company
employees. As of July 19, 1996 options to purchase 2,298,200 shares of Common
Stock have been granted in the aggregate, at exercise prices ranging from
$0.25 to $10.00 per share. These grants were exempt from registration pursuant
to Section 4(2) of the Act, Rule 701 thereunder or other applicable
exemptions.     
 
ITEM 27. EXHIBITS
 
<TABLE>   
<CAPTION>
 EXHIBIT NO. DESCRIPTION OF EXHIBIT
 ----------- ----------------------
 <C>         <S>
    1.1*     Form of Underwriting Agreement.
    3.1      Certificate of Incorporation of the Registrant.(2)
    3.2      By-Laws of the Registrant
             (a) Amended and Restated By-laws of the Registrant.(2)
             (b) Amendment No. 1 to Amended and Restated By-laws.(2)
    4.1      Form of Common Stock certificate.(2)
    5.1*     Opinion of Latham & Watkins with respect to the legality of the
             securities being registered.
    10.1     MCI Special Customer Arrangement between MCI Telecommunications
             Corporation and Digital Express Group, Inc. dated March 28,
             1996.(2)
    10.2     Customer contract with LCI International, Inc. dated May 29,
             1996.(2)
    10.3     Customer contract with WinStar Communications, Inc. dated June 6,
             1996.(2)
    10.4     Warrant agreement with WinStar Communications, Inc. dated June 6,
             1996.(2)
    10.5     Peering agreements
             (a) Agreement for T1 Gateway Attachment Services, as amended, with
                 ANS CO+RE Systems Inc. dated February 1, 1994.(2)
             (b) Bilateral Interconnection Agreement with PSINet Inc. dated
                 February 7, 1996.(2)
             (c) Peering Agreement with MCI Telecommunications Corporation
                 dated April 21, 1995.(2)
    10.6     Agreement with Hughes Network Systems, Inc. dated June 7, 1996.(2)
    10.7     Lease agreement with Banbury Associates Limited Partnership dated
             November 17, 1994.(2)
    10.8     Lease Agreement with George Christancos, dated December 4,
             1995.(2)
    10.9     Lease Agreement with Executive Office Network, Ltd.(1)
    10.10    Sublease Agreement with A.S. McGaughaan.(2)
    10.11    Employment and consulting agreements
             (a) Clyde A. Heintzelman, dated March 19, 1995.(1)
             (b) Christopher R. McCleary, dated February 1, 1996.(1)
             (c) Brian M. Deobald, dated March 25, 1996.(3)
             (d) Earl P. Galleher, dated March 25, 1996.(3)
</TABLE>    
 
                                     II-4
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT NO. DESCRIPTION OF EXHIBIT
 ----------- ----------------------
 <C>         <S>
             (e) Nicholas J. Magliato, dated March 25, 1996.(3)
             (f) William A. Pendley, dated July 15, 1996.(3)
             (g) Thomas M. Brandt, Jr., dated June 1, 1996.(1)
   10.12*    Stock option plans
             (a) Incentive Stock Option Plan.
             (b) 1996 Equity Participation Plan.
   10.13     Securities Purchase Agreement with Grotech Partners IV, L.P.,
             Venrock Associates, Southern Venture Fund II, L.P., Douglas E.
             Humphery and Michael T. Doughney dated March 24, 1995.(1)
   10.14     Stockholders Agreement with Grotech Partners IV, L.P., Venrock
             Associates, Southern Ventures II, L.P. Douglas E. Humphery and
             Michael T. Doughney dated March 24, 1995.(1)
   10.15     (a) Warrant Agreement with Grotech Partners IV, L.P. dated March
                 24, 1995.(1)
             (b) Warrant Agreement with Venrock Associates dated March 24,
                 1995.(1)
             (c) Warrant Agreement with Southern Venture Fund II, L.P. dated
                 March 24, 1995.(1)
   10.16     Loan and Security Agreement with Silicon Valley Bank dated April
             11, 1996.(1)
   10.17     First Amendment to Loan and Security Agreement with Silicon Valley
             Bank dated May  , 1996.(1)
   10.18     Revolving Promissory Note with Silicon Valley Bank dated April 11,
             1996.(1)
   10.19     Securities Purchase, Conversion and Exchange Agreement with
             Grotech Partners IV, L.P., Grotech Partners III, L.P., Grotech III
             Companion Fund, L.P., Grotech III Pennsylvania Fund, L.P., Venrock
             Associates, Venrock Associates II, L.P., Southern Venture Fund II,
             L.P., Blue Chip Capital Fund Limited Partnership, Crisler Capital
             Company, Limited Partnership dated May 30, 1996.(1)
   23.1      Consent of Ernst & Young LLP(3)
   23.2*     Consent of Latham & Watkins (to be included in Exhibit 5.1).
   27        Financial Data Schedule(3)
</TABLE>    
- --------
(1)  Previously filed with the Company's Registration Statement on Form SB-2,
     File No. 333-05871, filed June 12, 1996.
   
(2)  Previously filed with Amendment No. 1 to the Registration Statement on
     Form SB-2, filed July 5, 1996.     
   
(3)  Filed herewith.     
   
 *   To be filed by amendment.     
 
ITEM 28. UNDERTAKINGS
 
  The undersigned Registrant hereby undertakes that:
 
    (1) Insofar as indemnification for liabilities arising under the
  Securities Act of 1933 (the "Act") may be permitted to directors, officers
  and controlling persons of the small business issuer pursuant to the
  foregoing provisions, or otherwise, the small business issuer has been
  advised that in the opinion of the Securities and Exchange Commission such
  indemnification is against public policy and is, therefore, unenforceable.
  In the event that a claim for indemnification against such liabilities
  (other than the payment by the small business issuer of expenses incurred
  or paid by a director, officer or controlling person of the small business
  issuer in the successful defense of any action, suit or proceeding) is
  asserted by such director, officer or controlling person in connection with
  the securities being registered, the small business issuer will, unless in
  the opinion of its counsel the matter has been settled by controlling
  precedent, submit to a court of appropriate jurisdiction the question of
  whether such indemnification by it is against public policy as expressed in
  the Act and will be governed by the final adjudication of such issue.
 
 
                                     II-5
<PAGE>
 
    (2) For determining any liability under the Act, treat the information
  omitted from the form of prospectus filed as part of this registration
  statement in reliance upon Rule 430A and contained in the form of
  prospectus filed by the small business issuer under Rule 424(b)(1), or (4),
  or 497(h) under the Act as part of this registration statement as of the
  time the Commission declared it effective.
 
    (3) For determining any liability under the Act, treat each post-
  effective amendment that contains a form of prospectus as a new
  registration statement for the securities offered in the registration
  statement, and that offering of the securities at that time as the initial
  bona fide offering of those securities.
 
    (4) It will provide to the Underwriters at the closing specified in the
  Underwriting Agreement certificates in such denominations and registered in
  such names as required by the Underwriters to permit prompt delivery to
  each purchaser.
 
                                     II-6
<PAGE>
 
                                  SIGNATURES
   
  IN ACCORDANCE WITH THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRANT CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS
ALL OF THE REQUIREMENTS FOR FILING ON FORM SB-2 AND AUTHORIZED THIS AMENDMENT
NO. 2 TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, IN THE CITY OF
BELTSVILLE, STATE OF MARYLAND, ON JULY 23, 1996.     
 
                                          DIGEX, Incorporated
 
                                                /s/ Christopher R. McCleary
                                          By: _________________________________
                                                  Christopher R. McCleary
                                            Chief Executive Officer, President
                                                 and Chairman of the Board
   
  Pursuant to the requirements of the Securities Act of 1933, this Amendment
No. 2 has been signed below by the following persons in the capacities and on
the dates indicated.     
 
<TABLE>     
              SIGNATURE                        TITLE                 DATE
<S>                                    <C>                      <C> 
 
                  *                    Director                 
- -------------------------------------                           July 23, 1996
           FRANK A. ADAMS                                           
 
     /s/ Christopher R. McCleary       Chief Executive         
- -------------------------------------   Officer, President      July 23, 1996
       CHRISTOPHER R. MCCLEARY          and Chairman of the         
                                        Board (principal
                                        executive officer)
 
                  *                    Senior Vice              
- -------------------------------------   President, Chief        July 23, 1996
        THOMAS M. BRANDT, JR.           Financial Officer       
                                        (principal
                                        financial officer)
 
                  *                    Vice President,         
- -------------------------------------   Controller              July 23, 1996
           JOHN C. WELLING              (principal                  
                                        accounting officer)
 
 
</TABLE>      
                                     II-7
<PAGE>

<TABLE>     
<S>                                     <C>                     <C> 
              SIGNATURE                         TITLE                DATE
 
                  *                     Senior Vice             
- -------------------------------------    President, Director    July 23, 1996
         DOUGLAS E. HUMPHREY                                    
 
                  *                     Vice President,         
- -------------------------------------    Director               July 23, 1996
         MICHAEL T. DOUGHNEY                                    

                                        Director                July 23, 1996
- -------------------------------------                

         THOMAS H. CATO 
 
                  *                     Director                July 23, 1996
- -------------------------------------
      WILLIAM F. EARTHMAN, III
 
                  *                     Director                
- -------------------------------------                           July 23, 1996
           RAY A. ROTHROCK                                      
 
                  *                     Director                
- -------------------------------------                           July 23, 1996
          ROBERT M. STEWART                                     
 
                  *                     Director                
- -------------------------------------                           July 23,1996
            JOHN H. WYANT                                       
 
    */s/ Christopher R. McCleary
By: _________________________________
          ATTORNEY-IN-FACT
</TABLE>      
 
                                      II-8
<PAGE>
 
                                    EXHIBITS
 
<TABLE>   
<CAPTION>
                                                                     SEQUENTIAL
                                                                        PAGE
 EXHIBIT NO.                 DESCRIPTION OF EXHIBIT                    NUMBER
 -----------                 ----------------------                  ----------
 <C>         <S>                                                     <C>
    1.1*     Form of Underwriting Agreement.
    3.1      Certificate of Incorporation of the Registrant.(2)
    3.2      By-Laws of the Registrant
             (a) Amended and Restated By-laws of the Registrant(2)
             (b) Amendment No. 1 to Amended and Restated By-
                 laws(2)
    4.1      Form of Common Stock certificate.(2)
    5.1*     Opinion of Latham & Watkins with respect to the
             legality of the securities being registered.
   10.1      MCI Special Customer Arrangement between MCI
              Telecommunications Corporation and Digital Express
              Group, Inc. dated March 28, 1996.(2)
   10.2      Customer contract with LCI International, Inc. dated
             May 29, 1996.(2)
   10.3      Customer contract with WinStar Communications, Inc.
             dated June 6, 1996.(2)
   10.4      Warrant agreement with WinStar Communications, Inc.
             dated June 6, 1996.(2)
   10.5      Peering Agreements
             (a) Agreement for T1 Gateway Attachment Services, as
                 amended, with ANS CO+RE Systems Inc. dated February
                 1, 1994.(2)
             (b) Bilateral Interconnection Agreement with PSINet
                 Inc. dated February 7, 1996.(2)
             (c) Peering Agreement with MCI Telecommunications
                 Corporation dated April 21, 1995.(2)
   10.6      Agreement with Hughes Network Systems, Inc. dated
             June 7, 1996.(2)
   10.7      Lease agreement with Banbury Associates Limited
              Partnership dated November 17, 1994.(2)
   10.8      Lease Agreement with George Christancos, dated
             December 4, 1995.(2)
   10.9      Lease Agreement with Executive Office Network,
             Ltd.(1)
   10.10     Sublease Agreement with A.S. McGaughaan.(2)
   10.11     Employment and consulting agreements
             (a) Clyde A. Heintzelman, dated March 19, 1995.(1)
             (b) Christopher R. McCleary, dated February 1,
                 1996.(1)
             (c) Brian M. Deobald, dated March 25, 1996.(3)
             (d) Earl P. Galleher, dated March 25, 1996.(3)
             (e) Nicholas J. Magliato, dated March 25, 1996.(3)
             (f) William A. Pendley, dated July 15, 1996.(3)
             (g) Thomas M. Brandt, Jr., dated June 1, 1996.(1)
   10.12*    Stock option plans
             (a) Incentive Stock Option Plan.
             (b) 1996 Equity Participation Plan.
   10.13     Securities Purchase Agreement with Grotech Partners
              IV, L.P., Venrock Associates, Southern Venture Fund
              II, L.P., Douglas E. Humphery and Michael T.
              Doughney dated March 24, 1995.(1)
   10.14     Stockholders Agreement with Grotech Partners IV,
              L.P., Venrock Associates, Southern Ventures II, L.P.
              Douglas E. Humphery and Michael T. Doughney dated
              March 24, 1995.(1)
</TABLE>    
<PAGE>
 
 
<TABLE>   
<CAPTION>
                                                                    SEQUENTIAL
                                                                       PAGE
 EXHIBIT NO.                DESCRIPTION OF EXHIBIT                    NUMBER
 -----------                ----------------------                  ----------
 <C>         <S>                                                    <C>
    10.15    (a) Warrant Agreement with Grotech Partners IV, L.P.
              dated March 24, 1995.(1)
             (b) Warrant Agreement with Venrock Associates dated
             March 24, 1995.(1)
             (c) Warrant Agreement with Southern Venture Fund II,
              L.P. dated March 24, 1995.(1)
    10.16    Loan and Security Agreement with Silicon Valley Bank
             dated April 11, 1996.(1)
    10.17    First Amendment to Loan and Security Agreement with
              Silicon Valley Bank dated May  , 1996.(1)
    10.18    Revolving Promissory Note with Silicon Valley Bank
             dated April 11, 1996.(1)
    10.19    Securities Purchase, Conversion and Exchange
              Agreement with Grotech Partners IV, L.P., Grotech
              Partners III, L.P., Grotech III Companion Fund,
              L.P., Grotech III Pennsylvania Fund, L.P., Venrock
              Associates, Venrock Associates II, L.P., Southern
              Venture Fund II, L.P., Blue Chip Capital Fund
              Limited Partnership, Crisler Capital Company,
              Limited Partnership dated May 30, 1996.(1)
    23.1     Consent of Ernst & Young LLP(3)
    23.2*    Consent of Latham & Watkins (to be included in
             Exhibit 5.1).
    27       Financial Data Schedule(3)
</TABLE>    
- --------
(1) Previously filed with the Company's Registration Statement on Form SB-2,
    File No. 333-05871, filed June 12, 1996.
   
(2) Previously filed with Amendment No. 1 to the Registration Statement on Form
    SB-2, filed July 5, 1996.     
   
(3) Filed herewith.     
   
 * To be filed by amendment.     

<PAGE>

                                                               Exhibit 10.11(c)

                              DIGEX, INCORPORATED
                         OFFICER EMPLOYMENT AGREEMENT


     Employment Agreement dated as of 25 March, 1996 between DIGEX,
Incorporated, a Maryland corporation ("Employer"), and Brian Deobald (the
"Officer").

     Employer and the Officer wish to provide for the terms of the Officer's
employment by Employer.

     1.   Term.  The employment of the Officer under this Agreement shall
          ----                                                           
commence as of 25 March, 1996 and shall continue until 24 March, 1997 (the
"Initial Term"). The Officer's employment is subject to automatic renewal for
one year terms, (each a "Renewal Term," and together with the Initial Term the
"Term") unless either party gives at least ninety (90) days written notice
before the beginning of a renewal term that the Agreement shall not be renewed.
The term is subject to earlier termination as set forth in this Agreement.

     2.   Position and Duties.  The Officer shall be employed as Vice President
          -------------------                                                  
and General Manager, Individual Connectivity Group. During the Term, Officer
shall devote substantially all of his business time , energy and best efforts to
his duties with the Employer, subject to reasonable annual vacation time, and
shall use his best efforts to promote the interests and success of the Employer.
Employer reserves the right to modify title and responsibilities at anytime
during the Initial Term of this agreement.

     3.   Compensation and Benefits.
          ------------------------- 

          (a)  Base Salary. During his employment under this Agreement, Employer
               -----------
shall pay the Officer a base salary (the "Base Salary") at the annual rate of
$120,000. The Base Salary will be subject to annual review and positive
adjustment(s), if any are determined by Christopher McCleary, President and
Chief Executive Officer. The Officer's Base Salary shall be payable in regular
and equal installments in accordance with Employer's regular payroll procedures.
The first annual review is set for 31 December, 1996.

          (b)  Benefit Plans and Fringe Benefits.  During his employment under
               ---------------------------------                              
this Agreement, the Officer shall be entitled to participate in: (i) all
incentive compensation plans, savings plans and retirement plans of Employer;
(ii) all employee benefit plans maintained by Employer (including, without
limitation, medical prescription, dental, disability, salary continuance,
employee life, group life, accidental death and travel accident insurance plans
and programs). The Officer shall also be entitled to all fringe benefits for
which his status and level of employment qualify him in accordance with
Employer's policies as approved by the Board.

          (c)  Expense Reimbursement. Employer shall reimburse the Officer for
               ---------------------
               the ordinary and necessary business expenses incurred by him in
               the performance of his duties as an officer of Employer in
               accordance with Employer's policies and procedures, and upon
               receipt by Employer of appropriate documentation of such
               expenses.


<PAGE>
 
          (d)  Auto Allowance.  Employer shall provide Officer an auto allowance
               --------------                                                   
               in the amount of $550 per month.

          (e)  Bonus. Officer shall participate in the DIGEX Management Bonus
               -----                                                         
               program which is paid annually in December.

          (f)  Withholding Taxes. All salary, benefits, reimbursements and any
               -----------------
               other payments to Officer under this Agreement shall be subject
               to all applicable payroll and withholding taxes and deductions
               required by any law, rule or regulation of any federal, state or
               local authority.

          (g)  Stock Options.  Officer shall participate in the DIGEX Employees
               -------------                                                   
               Stock Option program and receive grants from time to time at the
               discretion of the Board of Directors.

     4.   Termination.
          ----------- 

          (a)  Death and Disability.  The Officer's employment under this
               --------------------                                      
Agreement shall terminate upon his death. Employer may terminate the Officer's
employment under this Agreement if the Management determines in good faith that
he is physically or mentally incapacitated or has been unable to perform his
duties under this Agreement for a period of (i) at least 60 consecutive days, or
(ii) at least 100 days (whether or not consecutive) in any period of 365
consecutive days. In order to assist the Board in making that determination, the
Officer shall, as reasonably requested by the Management, (A) make himself
available for medical examinations by one or more physicians chosen by the Board
and (B) grant the Management and any such physicians access to all relevant
medical records to them and use his reasonable efforts to cause his own
physicians to be available to discuss his health with the physicians chosen by
the Management to examine the Officer.

          (b)  Termination by Employer for Cause.  Employer may terminate the
               ---------------------------------                             
Officer's employment under this Agreement for Cause. For the purposes of this
Agreement, "Cause" shall mean any of the following: (i) the Officer's failure to
perform his duties under this Agreement, (ii) recklessness in the performance of
the Officer's duties, (iii) breach by the Officer of the provisions of Section
6(a) below, (iv) the Officer's conviction for, admission of or plea of nolo
contendere to a felony (whether or not in connection with his employment), and
(v) embezzlement, theft or willful misappropriation of, or the commission of any
fraud related to, Employer's funds, assets, or opportunities.

     5.   Consequences of Termination.
          --------------------------- 

          (a)  Death, Disability, Termination by Employer for Cause or
               ------------------------------------------------------- 
Termination by the Officer. If the Officer's employment under this Agreement is
- --------------------------
(i) terminated pursuant to Section 4(a) or 4(b), or (ii) terminated by the
Officer, the Officer's employment shall immediately be terminated and the
Officer shall not thereafter be entitled to receive any salary or other payments
or benefits under this Agreement, other than the payment pursuant to Section
3(a) of Base Salary earned and the reimbursement pursuant to Section 3(c) of
expenses incurred, through the date of termination.

                                      -2-
<PAGE>
 
     6.   Certain Restrictions.
          -------------------- 

          (a)  Confidentiality. Officer covenants and agrees that from and after
               ---------------
the date of this Agreement and forever thereafter, he shall keep secret and
confidential, and shall not divulge outside the scope of his employment with
Employer to any person or entity, any information, knowledge or data (the
"Information") whether or not learned or possessed by Officer on or after the
date of this Agreement, of or pertaining to (i) the Employer, and (ii) any other
person, firm, corporation or business organization with which the Employer may
do business during the Term, that is not in the public domain.

          (b)  Competitive Activity.  Officer acknowledges that his services
               --------------------                                         
pursuant to this Agreement are unique and extraordinary, that the Employer will
be dependent upon Officer for the development and growth of its business and
related functions, and that he will continue to develop personal relationships
with significant customers of the Employer and to have control of confidential
information concerning, and lists of customers of, the Employer. Officer
further acknowledges the Employer would suffer serious and irreparable harm if
during the term of his employment with the Employer, and within a reasonable
time after the termination of his employment, he should enter into a business
competitive with the Employer.

               Accordingly, in order to protect such legitimate and valuable
interests of the Employer, and in consideration of the Employer's obligations
under this Agreement, it is agreed that until two (2) years following the
termination of the Officer's employment with the Employer (regardless of the
reason for termination even if the termination was not for cause):

               (1)  Officer will not, directly or indirectly, operate, engage
in, render services to, or hold any material ownership interest in (whether as
an individual, on his own account or as an employee, consultant, agent,
salesman, officer, director, shareholder, partner or member of any other firm or
entity) (i) any entity or enterprise engaged in any business directly
competitive with that of the Employer; and

               (2)  Officer will not, directly or indirectly, whether on his own
behalf or on behalf of any other person or entity, in any manner solicit for
employment any persons who were officers, shareholders, directors, department
heads, supervisors or sales persons of the Employer in the two (2) year period
prior to the date of termination or during the non-competition period.

               (3)  Officer agrees that the time period, the geographical area
and the scope of the restrictions contained above, as well as the provisions of
subsections (a) and (b) above, are divisible and severable and that if any of
the foregoing provisions are held invalid by a court of competent jurisdiction,
such provisions shall be deemed modified to the smallest extent necessary to
make them valid and enforceable and the enforceability of the other provisions
shall not be affected in any way.

          (c)  Remedy for Breach and Modification. The Officer acknowledges that
               ----------------------------------
the provisions of this Section 6 are reasonable and necessary for the protection
of Employer and that Employer will be irrevocably damaged if these provisions
are not specifically enforced. Accordingly, the Officer agrees that, in addition
to any other relief or remedies available to Employer, Employer shall be
entitled to 

                                      -3-
<PAGE>
 
seek and obtain an appropriate injunction or other equitable remedy for the
purposes of restraining the Officer from any actual or threatened breach of or
otherwise enforcing these provisions and no bond or security will be required in
connection therewith.

     7.   Miscellaneous.
          ------------- 

          (a)  Notices.  Any notice or other communication made or given in
               -------                                                     
connection with this Agreement shall be in writing and shall be deemed to have
been duly given when delivered or mailed by registered mail, return receipt
requested, to a party at his or its address set forth below or at such other
address as a party may specify by notice to the other:

          To the Officer:                    Brian Deobald
                                             1658 A. Avon Place, NW
                                             Washington, DC  20007

          To Employer:                       Christopher R. McCleary
                                             DIGEX, Incorporated
                                             6800 Virginia Manor Road
                                             Beltsville, Maryland  20705


          (b)  Entire Agreement; Amendment.  This Agreement supersedes all prior
               ---------------------------                                      
agreements between the parties with respect to its subject matter, is intended
with the documents referred to herein as a complete and exclusive statement of
the terms of the Agreement between the parties with respect thereto and may be
amended only by a writing signed by both parties hereto.

          (c)  Waiver.  The failure of any party to insist upon strict adherence
               ------                                                           
to any term of this Agreement on any occasion shall not be considered a waiver
or deprive that party of the right thereafter to insist upon strict adherence to
that term or any other term of this Agreement. Any waiver must be in writing.

          (d)  Assignment.  Except as otherwise provided in this Section 7(d),
               ----------                                                     
this Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, representatives, successors and assigns.
This Agreement shall not be assignable by the Officer.

          (e)  Captions.  The captions in this Agreement are for convenience of
               --------                                                        
reference only and shall not be given any effect in the interpretation of this
Agreement.

          (f)  Governing Law. This Agreement and (unless otherwise provided) all
               -------------
amendments hereof and waivers and consents hereunder shall be governed by the
internal law of the State of Maryland, without regard to the conflicts of law
principles thereof. All litigation or arbitration shall be conducted in
Maryland.

                                      -4-
<PAGE>
 
          (g)  Survivorship. The respective rights and obligations of the
               ------------
parties hereunder shall survive any termination of this Agreement to the extent
necessary to the intended preservation of such rights and obligations.

     IN WITNESS WHEREOF, the parties have executed and sealed this Employment
Agreement on the date first above written.

                                    DIGEX, Incorporated.

                                    By: /s/ Christopher R. McCleary  (SEAL)
                                        -----------------------------
                                        Christopher R. McCleary
                                        President & Chief Executive Officer

                                        /s/ Brian Deobald            (SEAL)
                                        -----------------------------
                                        Brian Deobald
                                        Vice President and General Manager,
                                        Individual Connectivity Group

                                      -5-

<PAGE>

                                                                Exhibit 10.11(d)

                              DIGEX, INCORPORATED
                          OFFICER EMPLOYMENT AGREEMENT


     Employment Agreement dated as of 25 March, 1996 between Digital Express
Group, a Maryland corporation ("Employer"), and Earl Galleher (the "Officer").

     Employer and the Officer wish to provide for the terms of the Officer's
employment by Employer.

     1.   Term. The employment of the Officer under this Agreement shall
          ----                                                           
commence as of 11 March, 1996 and shall continue until 10 March, 1997 (the
"Initial Term").  The Officer's employment is subject to automatic renewal for
one year terms, (each a "Renewal Term," and together with the Initial Term the
"Term") unless either party gives at least ninety (90) days written notice
before the beginning of a renewal term that the Agreement shall not be renewed.
The term is subject to earlier termination as set forth in this Agreement.

     2.   Position and Duties.  The Officer shall be employed as Vice President
          -------------------                                                  
and General Manager, Internet Server Products Group.  During the Term, Officer
shall devote substantially all of his business time, energy and best efforts to
his duties with the Employer, subject to reasonable annual vacation time, and
shall use his best efforts to promote the interests and success of the Employer.
Employer reserves the right to modify title and responsibilities at anytime
during the Initial Term of this agreement.

     3.   Compensation and Benefits.
          ------------------------- 

          (a)  Base Salary. During his employment under this Agreement, Employer
               -----------
shall pay the Officer a base salary (the "Base Salary") at the annual rate of
$120,000. The Base Salary will be subject to annual review and positive
adjustment(s), if any are determined by Christopher McCleary, President and
Chief Executive Officer. The Officer's Base Salary shall be payable in regular
and equal installments in accordance with Employer's regular payroll procedures.
The first annual review is set for 31 December, 1996.

          (b)  Benefit Plans and Fringe Benefits. During his employment under
               ---------------------------------                              
this Agreement, the Officer shall be entitled to participate in: (i) all
incentive compensation plans, savings plans and retirement plans of Employer;
(ii) all employee benefit plans maintained by Employer (including, without
limitation, medical prescription, dental, disability, salary continuance,
employee life, group life, accidental death and travel accident insurance plans
and programs).  The Officer shall also be entitled to all fringe benefits for
which his status and level of employment qualify him in accordance with
Employer's policies as approved by the Board.

          (c)  Expense Reimbursement. Employer shall reimburse the Officer for
               ---------------------
               the ordinary and necessary business expenses incurred by him in
               the performance of his duties as an officer of Employer in
               accordance with Employer's policies and procedures, and upon
               receipt by Employer of appropriate documentation of such
               expenses.

                                      -1-
<PAGE>
 
          (d)  Auto Allowance. Employer shall provide Officer an auto allowance
               --------------                                                   
               in the amount of $550 per month.

          (e)  Bonus. Officer shall participate in the DIGEX Management Bonus
               -----                                                         
               program which is paid annually in December.

          (f)  Withholding Taxes. All salary, benefits, reimbursements and any
               -----------------
               other payments to Officer under this Agreement shall be subject
               to all applicable payroll and withholding taxes and deductions
               required by any law, rule or regulation of any federal, state or
               local authority.

          (g)  Stock Options. Officer shall participate in the DIGEX Employees
               -------------                                                   
               Stock Option program and receive grants from time to time at the
               discretion of the Board of Directors.

     4.   Termination.
          ----------- 

          (a)  Death and Disability. The Officer's employment under this
               --------------------                                      
Agreement shall terminate upon his death. Employer may terminate the Officer's
employment under this Agreement if the Management determines in good faith that
he is physically or mentally incapacitated or has been unable to perform his
duties under this Agreement for a period of (i) at least 60 consecutive days, or
(ii) at least 100 days (whether or not consecutive) in any period of 365
consecutive days. In order to assist the Board in making that determination,
the Officer shall, as reasonably requested by the Management, (A) make himself
available for medical examinations by one or more physicians chosen by the Board
and (B) grant the Management and any such physicians access to all relevant
medical records to them and use his reasonable efforts to cause his own
physicians to be available to discuss his health with the physicians chosen by
the Management to examine the Officer.

          (b)  Termination by Employer for Cause. Employer may terminate the
               ---------------------------------                             
Officer's employment under this Agreement for Cause. For the purposes of this
Agreement, "Cause" shall mean any of the following: (i) the Officer's failure
to perform his duties under this Agreement, (ii) recklessness in the performance
of the Officer's duties, (iii) breach by the Officer of the provisions of
Section 6(a) below, (iv) the Officer's conviction for, admission of or plea of
nolo contendere to a felony (whether or not in connection with his employment),
and (v) embezzlement, theft or willful misappropriation of, or the commission of
any fraud related to, Employer's funds, assets, or opportunities.

     5.   Consequences of Termination.
          --------------------------- 

          (a)  Death, Disability, Termination by Employer for Cause or
               -------------------------------------------------------
Termination by the Officer. If the Officer's employment under this Agreement is
- --------------------------
(i) terminated pursuant to Section 4(a) or 4(b), or (ii) terminated by the
Officer, the Officer's employment shall immediately be terminated and the
Officer shall not thereafter be entitled to receive any salary or other payments
or benefits under this Agreement, other than the payment pursuant to Section
3(a) of Base Salary earned and the reimbursement pursuant to Section 3(c) of
expenses incurred, through the date of termination.

                                      -2-
<PAGE>
 
     6.   Certain Restrictions.
          -------------------- 

          (a)  Confidentiality. Officer covenants and agrees that from and after
               ---------------
the date of this Agreement and forever thereafter, he shall keep secret and
confidential, and shall not divulge outside the scope of his employment with
Employer to any person or entity, any information, knowledge or data (the
"Information") whether or not learned or possessed by Officer prior to, on or
after the date of this Agreement, of or pertaining to (i) the Employer, and (ii)
any other person, firm, corporation or business organization with which the
Employer may do business during the Term, that is not in the public domain (and
whether relating to methods, processes, techniques, discoveries, pricing,
marketing or any other matters).

          (b)  Competitive Activity. Officer acknowledges that his services
               --------------------                                         
pursuant to this Agreement are unique and extraordinary, that the Employer will
be dependent upon Officer for the development and growth of its business and
related functions, and that he will continue to develop personal relationships
with significant customers of the Employer and to have control of confidential
information concerning, and lists of customers of, the Employer. Officer
further acknowledges the Employer would suffer serious and irreparable harm if
during the term of his employment with the Employer, and within a reasonable
time after the termination of his employment, he should enter into a business
competitive with the Employer.

               Accordingly, in order to protect such legitimate and valuable
interests of the Employer, and in consideration of the Employer's obligations
under this Agreement, it is agreed that until two (2) years following the
termination of the Officer's employment with the Employer (regardless of the
reason for termination even if the termination was not for cause):

               (1)  Officer will not, directly or indirectly, operate, engage
in, render services to, or hold any ownership interest in (whether as an
individual, on his own account or as an employee, consultant, agent, salesman,
officer, director, shareholder, partner or member of any other firm or entity)
(i) any entity or enterprise engaged in any business competitive with that of
the Employer or (ii) any business which is or has at any time been a customer,
supplier or distributor of the Employer; and

               (2)  Officer will not, directly or indirectly, whether on his own
behalf or on behalf of any other person or entity, in any manner (i) solicit the
business of or otherwise contact in any commercial capacity any person or entity
which was a customer, supplier, distributor or competitor of the Employer for
the purpose of obtaining business of the type performed by the Employer, or (ii)
solicit for employment any persons who were officers, shareholders, directors,
department heads, supervisors or sales persons of the Employer in the two (2)
year period prior to the date of termination or during the non-competition
period.

               (3)  Officer agrees that the time period, the geographical area
and the scope of the restrictions contained above, as well as the provisions of
subsections (a) and (b) above, are divisible and severable and that if any of
the foregoing provisions are held invalid by a court of competent jurisdiction,
such provisions shall be deemed modified to the smallest extent necessary to
make them valid and enforceable and the enforceability of the other provisions
shall not be affected in any way.

                                      -3-
<PAGE>
 
          (c)  Remedy for Breach and Modification. The Officer acknowledges that
               ----------------------------------
the provisions of this Section 6 are reasonable and necessary for the protection
of Employer and that Employer will be irrevocably damaged if these provisions
are not specifically enforced. Accordingly, the Officer agrees that, in addition
to any other relief or remedies available to Employer, Employer shall be
entitled to seek and obtain an appropriate injunction or other equitable remedy
for the purposes of restraining the Officer from any actual or threatened breach
of or otherwise enforcing these provisions and no bond or security will be
required in connection therewith.

     7.   Miscellaneous.
          ------------- 

          (a)  Notices. Any notice or other communication made or given in
               -------                                                     
connection with this Agreement shall be in writing and shall be deemed to have
been duly given when delivered or mailed by registered mail, return receipt
requested, to a party at his or its address set forth below or at such other
address as a party may specify by notice to the other:

          To the Officer:                    Earl Galleher
                                             5910 Cranston Road
                                             Bethesda, MD  20816

          To Employer:                       Christopher R. McCleary
                                             DIGEX, Incorporated
                                             6800 Virginia Manor Road
                                             Beltsville, Maryland  20705

          (b)  Entire Agreement; Amendment.  This Agreement supersedes all prior
               ---------------------------                                      
agreements between the parties with respect to its subject matter, is intended
with the documents referred to herein as a complete and exclusive statement of
the terms of the Agreement between the parties with respect thereto and may be
amended only by a writing signed by both parties hereto.

          (c)  Waiver.  The failure of any party to insist upon strict adherence
               ------                                                           
to any term of this Agreement on any occasion shall not be considered a waiver
or deprive that party of the right thereafter to insist upon strict adherence to
that term or any other term of this Agreement. Any waiver must be in writing.

          (d)  Assignment.  Except as otherwise provided in this Section 7(d),
               ----------                                                     
this Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, representatives, successors and assigns.
This Agreement shall not be assignable by the Officer.

          (e)  Captions. The captions in this Agreement are for convenience of
               --------                                                        
reference only and shall not be given any effect in the interpretation of this
Agreement.

                                      -4-
<PAGE>
 
          (f)  Governing Law. This Agreement and (unless otherwise provided) all
               -------------
amendments hereof and waivers and consents hereunder shall be governed by the
internal law of the State of Maryland, without regard to the conflicts of law
principles thereof. All litigation or arbitration shall be conducted in
Maryland.

          (g)  Survivorship. The respective rights and obligations of the
               ------------
parties hereunder shall survive any termination of this Agreement to the extent
necessary to the intended preservation of such rights and obligations.

     IN WITNESS WHEREOF, the parties have executed and sealed this Employment
Agreement on the date first above written.

                               DIGEX, Incorporated.



                               By: /s/ Christopher R. McCeary             (SEAL)
                                  ----------------------------------------
                                  Christopher R. McCleary
                                  President & Chief Executive Officer



                                   /s/ Earl Galleher                      (SEAL)
                                  ----------------------------------------
                                  Earl Galleher
                                  Vice President and General Manager,
                                  Internet Server Products Group

                                      -5-

<PAGE>
 
                                                                Exhibit 10.11(e)

                              DIGEX, INCORPORATED
                         OFFICER EMPLOYMENT AGREEMENT


     Employment Agreement dated as of  25 March, 1996  between DIGEX,
Incorporated, a Maryland corporation ("Employer"), and  Nicholas Magliato (the
"Officer").

     Employer and the Officer  wish to provide for the terms of the Officer's
employment by Employer.

     1.   Term.  The employment of the Officer under this Agreement shall
          ----                                                           
commence as of  25 March, 1996 and shall continue until  24 March, 1997 (the
"Initial Term").  The Officer's employment is subject to automatic renewal for
one year terms, (each a "Renewal Term," and together with the Initial Term the
"Term") unless either party gives at least ninety (90) days written notice
before the beginning of a renewal term that the Agreement shall not be renewed.
The term is subject to earlier termination as set forth in this Agreement.

     2.   Position and Duties.  The Officer shall be employed as Vice President
          -------------------                                                  
and General Manager, Private Networks Group.  During the Term, Officer shall
devote substantially all of his business time , energy and best efforts to his
duties with the Employer, subject to reasonable annual vacation time, and shall
use his best efforts to promote the interests and success of the Employer.
Employer reserves the right to modify title and responsibilities at anytime
during the Initial Term of this agreement.

     3.   Compensation and Benefits.
          ------------------------- 

          (a)  Base Salary.  During his employment under this Agreement,
               -----------                                           
Employer shall pay the Officer a base salary (the "Base Salary") at the annual
rate of $120,000. The Base Salary will be subject to annual review and positive
adjustment(s), if any are determined by Christopher McCleary, President and
Chief Executive Officer. The Officer's Base Salary shall be payable in regular
and equal installments in accordance with Employer's regular payroll procedures.
The first annual review is set for 31 December, 1996.

          (b)  Benefit Plans and Fringe Benefits.  During his employment under
               ---------------------------------                              
this Agreement, the Officer shall be entitled to participate in:  (i) all
incentive compensation plans, savings plans and retirement plans of Employer;
(ii) all employee benefit plans maintained by Employer (including, without
limitation, medical prescription, dental, disability, salary continuance,
employee life, group life, accidental death and travel accident insurance plans
and programs).  The Officer shall also be entitled to all fringe benefits for
which his status and level of employment qualify him in accordance with
Employer's policies as approved by the Board.

          (c)  Expense Reimbursement.  Employer shall reimburse the Officer for
               ---------------------                                           
               the ordinary and necessary business expenses incurred by him in
               the performance of his duties as an officer of Employer in
               accordance with Employer's policies and procedures, and upon
               receipt by Employer of appropriate documentation of such
               expenses.


<PAGE>
 
          (d)  Auto Allowance.  Employer shall provide Officer an auto allowance
               --------------                                                   
               in the amount of  $550 per month.

          (e)  Bonus. Officer shall participate in the DIGEX Management Bonus
               -----                                                         
               program which is paid annually in December.

          (f)  Withholding Taxes.  All salary, benefits, reimbursements and any
               -----------------                                               
               other payments to Officer under this Agreement shall be subject
               to all applicable payroll and withholding taxes and deductions
               required by any law, rule or regulation of any federal, state or
               local authority.

          (g)  Stock Options.  Officer shall participate in the DIGEX Employees
               -------------                                                   
               Stock Option program and receive grants from time to time at the
               discretion of the Board of Directors.

     4.   Termination.
          ----------- 

          (a)  Death and Disability.  The Officer's employment under this
               --------------------                                      
Agreement shall terminate upon his death.  Employer may terminate the Officer's
employment under this Agreement if the Management determines in good faith that
he is physically or mentally incapacitated or has been unable to perform his
duties under this Agreement for a period of (i) at least 60 consecutive days, or
(ii) at least 100 days (whether or not consecutive) in any period of 365
consecutive days.  In order to assist the Board in making that determination,
the Officer shall, as reasonably requested by the Management, (A) make himself
available for medical examinations by one or more physicians chosen by the Board
and (B) grant the Management and any such physicians access to all relevant
medical records to them and use his reasonable efforts to cause his own
physicians to be available to discuss his health with the physicians chosen by
the Management to examine the Officer.

          (b)  Termination by Employer for Cause.  Employer may terminate the
               ---------------------------------                             
Officer's employment under this Agreement for Cause.  For the purposes of this
Agreement, "Cause" shall mean any of the following:  (i) the Officer's failure
to perform his duties under this Agreement, (ii) recklessness in the performance
of the Officer's duties, (iii) breach by the Officer of the provisions of
Section 6(a) below, (iv) the Officer's conviction for, admission of or plea of
nolo contendere to a felony (whether or not in connection with his employment),
and (v) embezzlement, theft or willful misappropriation of, or the commission of
any fraud related to, Employer's funds, assets, or opportunities.

     5.   Consequences of Termination.
          --------------------------- 

          (a)  Death, Disability, Termination by Employer for Cause or
               -------------------------------------------------------
Termination by the Officer.  If the Officer's employment under this Agreement is
- --------------------------
(i) terminated pursuant to Section 4(a) or 4(b), or (ii) terminated by the
Officer, the Officer's employment shall immediately be terminated and the
Officer shall not thereafter be entitled to receive any salary or other payments
or benefits under this Agreement, other than the payment pursuant to Section
3(a) of Base Salary earned and the reimbursement pursuant to Section 3(c) of
expenses incurred, through the date of termination.

                                      -2-
<PAGE>
 
     6.   Certain Restrictions.
          -------------------- 

          (a)  Confidentiality.  Officer covenants and agrees that from and
               ---------------                                    
after the date of this Agreement and forever thereafter, he shall keep secret
and confidential, and shall not divulge outside the scope of his employment with
Employer to any person or entity, any information, knowledge or data (the
"Information") whether or not learned or possessed by Officer on or after the
date of this Agreement, of or pertaining to (i) the Employer, and (ii) any other
person, firm, corporation or business organization with which the Employer may
do business during the Term, that is not in the public domain.

          (b)  Competitive Activity.  Officer acknowledges that his services
               --------------------                                         
pursuant to this Agreement are unique and extraordinary, that the Employer will
be dependent upon Officer for the development and growth of its business and
related functions, and that he will continue to develop personal relationships
with significant customers of the Employer and to have control of confidential
information concerning, and lists of customers of, the Employer.  Officer
further acknowledges the Employer would suffer serious and irreparable harm if
during the term of his employment with the Employer, and within a reasonable
time after the termination of his employment, he should enter into a business
competitive with the Employer.

               Accordingly, in order to protect such legitimate and valuable
interests of the Employer, and in consideration of the Employer's obligations
under this Agreement, it is agreed that until two (2) years following the
termination of the Officer's employment with the Employer (regardless of the
reason for termination even if the termination was not for cause):

               (1)  Officer will not, directly or indirectly, operate, engage
in, render services to, or hold any material ownership interest in (whether as
an individual, on his own account or as an employee, consultant, agent,
salesman, officer, director, shareholder, partner or member of any other firm or
entity) (i) any entity or enterprise engaged in any business directly
competitive with that of the Employer; and

               (2)  Officer will not, directly or indirectly, whether on his own
behalf or on behalf of any other person or entity, in any manner solicit for
employment any persons who were officers, shareholders, directors, department
heads, supervisors or sales persons of the Employer in the two (2) year period
prior to the date of termination or during the non-competition period.

               (3)  Officer agrees that the time period, the geographical area
and the scope of the restrictions contained above, as well as the provisions of
subsections (a) and (b) above, are divisible and severable and that if any of
the foregoing provisions are held invalid by a court of competent jurisdiction,
such provisions shall be deemed modified to the smallest extent necessary to
make them valid and enforceable and the enforceability of the other provisions
shall not be affected in any way.

          (c)  Remedy for Breach and Modification.  The Officer acknowledges
               ----------------------------------                     
that the provisions of this Section 6 are reasonable and necessary for the
protection of Employer and that Employer will be irrevocably damaged if these
provisions are not specifically enforced. Accordingly, the Officer agrees that,
in addition to any other relief or remedies available to Employer, Employer
shall be entitled to 

                                      -3-
<PAGE>
 
seek and obtain an appropriate injunction or other equitable remedy for the
purposes of restraining the Officer from any actual or threatened breach of or
otherwise enforcing these provisions and no bond or security will be required in
connection therewith.

     7.   Miscellaneous.
          ------------- 

          (a)  Notices.  Any notice or other communication made or given in
               -------                                                     
connection with this Agreement shall be in writing and shall be deemed to have
been duly given when delivered or mailed by registered mail, return receipt
requested, to a party at his or its address set forth below or at such other
address as a party may specify by notice to the other:

          To the Officer:               Nicholas Magliato          
                                        6106 Temple Street         
                                        Bethesda, MD  20817        
                                                                   
          To Employer:                  Christopher R. McCleary    
                                        DIGEX, Incorporated        
                                        6800 Virginia Manor Road   
                                        Beltsville, Maryland  20705 

          (b)  Entire Agreement; Amendment.  This Agreement supersedes all prior
               ---------------------------                                      
agreements between the parties with respect to its subject matter, is intended
with the documents referred to herein as a complete and exclusive statement of
the terms of the Agreement between the parties with respect thereto and may be
amended only by a writing signed by both parties hereto.

          (c)  Waiver.  The failure of any party to insist upon strict adherence
               ------                                                           
to any term of this Agreement on any occasion shall not be considered a waiver
or deprive that party of the right thereafter to insist upon strict adherence to
that term or any other term of this Agreement.  Any waiver must be in writing.

          (d)  Assignment.  Except as otherwise provided in this Section 7(d),
               ----------                                                     
this Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, representatives, successors and assigns.
This Agreement shall not be assignable by the Officer.

          (e)  Captions.  The captions in this Agreement are for convenience of
               --------                                                        
reference only and shall not be given any effect in the interpretation of this
Agreement.

          (f)  Governing Law.  This Agreement and (unless otherwise provided)
               -------------                                                  
all amendments hereof and waivers and consents hereunder shall be governed by
the internal law of the State of Maryland, without regard to the conflicts of
law principles thereof. All litigation or arbitration shall be conducted in
Maryland.

                                      -4-
<PAGE>
 
          (g)  Survivorship.  The respective rights and obligations of the
               ------------                                                 
parties hereunder shall survive any termination of this Agreement to the extent
necessary to the intended preservation of such rights and obligations.

     IN WITNESS WHEREOF, the parties have executed and sealed this Employment
Agreement on the date first above written.

                                DIGEX, Incorporated.



                                By:/s/ Christopher R. McCleary            (SEAL)
                                   --------------------------------------
                                    Christopher R. McCleary
                                    President & Chief Executive Officer

                                    

                                   /s/ Nicholas Magliato                  (SEAL)
                                -----------------------------------------
                                    Nicholas Magliato
                                    Vice President and General Manager,
                                    Private Networks Group

                                      -5-

<PAGE>

                                                                Exhibit 10.11(f)

                              DIGEX, INCORPORATED
                         OFFICER EMPLOYMENT AGREEMENT



     Employment Agreement dated as of  15 July, 1996  between Digital Express
Group, a Maryland corporation ("Employer"), and  William Pendley (the
"Officer").

     Employer and the Officer  wish to provide for the terms of the Officer's
employment by Employer.

     1.   Term.  The employment of the Officer under this Agreement shall
          ----                                                           
commence as of  15 July, 1996 and shall continue until 14 July, 1997 (the
"Initial Term").  The Officer's employment is subject to automatic renewal for
one year terms, (each a "Renewal Term," and together with the Initial Term the
"Term") unless either party gives at least ninety (90) days written notice
before the beginning of a renewal term that the Agreement shall not be renewed.
The term is subject to earlier termination as set forth in this Agreement.

     2.   Position and Duties.  The Officer shall be employed as Vice President
          -------------------                                                  
and Assistant General Manager, Business Connectivity. During the Term, Officer
shall devote substantially all of his business time , energy and best efforts to
his duties with the Employer, subject to reasonable annual vacation time, and
shall use his best efforts to promote the interests and success of the Employer.
Employer reserves the right to modify title and responsibilities at anytime
during the Initial Term of this agreement.

     3.   Compensation and Benefits.
          ------------------------- 

          (a)  Base Salary.  During his employment under this Agreement,
               -----------
Employer shall pay the Officer a base salary (the "Base Salary") at the annual
rate of $89,000. The Base Salary will be subject to annual review and positive
adjustment(s), if any are determined by Clyde Heintzelman, Chief Operating
Officer. The Officer's Base Salary shall be payable in regular and equal
installments in accordance with Employer's regular payroll procedures. The first
annual review is set for 31 December, 1996.

          (b)  Benefit Plans and Fringe Benefits.  During his employment under
               ---------------------------------                              
this Agreement, the Officer shall be entitled to participate in:  (i) all
incentive compensation plans, savings plans and retirement plans of Employer;
(ii) all employee benefit plans maintained by Employer (including, without
limitation, medical prescription, dental, disability, salary continuance,
employee life, group life, accidental death and travel accident insurance plans
and programs).  The Officer shall also be entitled to all fringe benefits for
which his status and level of employment qualify him in accordance with
Employer's policies as approved by the Board.

          (c)  Expense Reimbursement.  Employer shall reimburse the Officer for
               ---------------------                                           
               the ordinary and necessary business expenses incurred by him in
               the performance of his duties as an officer of Employer in
               accordance with Employer's policies and procedures, and upon
               receipt by Employer of appropriate documentation of such
               expenses.

                                      -1-
<PAGE>
 
          (d)  Auto Allowance.  Employer shall provide Officer an auto allowance
               --------------                                                   
               in the amount of  $550 per month.
            
          (e)  Bonus. Officer shall participate in the DIGEX Management Bonus
               -----                                                         
               program. This position has a range of $0-$26,000 based on goal 
               attainment as assigned.
            
          (f)  Withholding Taxes.  All salary, benefits, reimbursements and any
               -----------------                                               
               other payments to Officer under this Agreement shall be subject
               to all applicable payroll and withholding taxes and deductions
               required by any law, rule or regulation of any federal, state or
               local authority.
            
          (g)  Stock Options.  Officer shall participate in the DIGEX Employees
               -------------                                                   
               Stock Option program and receive grants from time to time at the
               discretion of the Board of Directors.

     4.   Termination.
          ----------- 

          (a)  Death and Disability.  The Officer's employment under this
               --------------------                                      
Agreement shall terminate upon his death.  Employer may terminate the Officer's
employment under this Agreement if the Management determines in good faith that
he is physically or mentally incapacitated or has been unable to perform his
duties under this Agreement for a period of (i) at least 60 consecutive days, or
(ii) at least 100 days (whether or not consecutive) in any period of 365
consecutive days.  In order to assist the Board in making that determination,
the Officer shall, as reasonably requested by the Management, (A) make himself
available for medical examinations by one or more physicians chosen by the Board
and (B) grant the Management and any such physicians access to all relevant
medical records to them and use his reasonable efforts to cause his own
physicians to be available to discuss his health with the physicians chosen by
the Management to examine the Officer.

          (b)  Termination by Employer for Cause.  Employer may terminate the
               ---------------------------------                             
Officer's employment under this Agreement for Cause.  For the purposes of this
Agreement, "Cause" shall mean any of the following:  (i) the Officer's failure
to perform his duties under this Agreement, (ii) recklessness in the performance
of the Officer's duties, (iii) breach by the Officer of the provisions of
Section 6(a) below, (iv) the Officer's conviction for, admission of or plea of
nolo contendere to a felony (whether or not in connection with his employment),
and (v) embezzlement, theft or willful misappropriation of, or the commission of
any fraud related to, Employer's funds, assets, or opportunities.

     5.   Consequences of Termination.
          --------------------------- 

          (a)  Death, Disability, Termination by Employer for Cause or
               -------------------------------------------------------
Termination by the Officer. If the Officer's employment under this Agreement is
- --------------------------
(i) terminated pursuant to Section 4(a) or 4(b), or (ii) terminated by the
Officer, the Officer's employment shall immediately be terminated and the
Officer shall not thereafter be entitled to receive any salary or other payments
or benefits under this Agreement, other than the payment pursuant to Section
3(a) of Base Salary earned and the reimbursement pursuant to Section 3(c) of
expenses incurred, through the date of termination.

                                      -2-
<PAGE>
 
     6.   Certain Restrictions.
          -------------------- 

          (a)  Confidentiality.  Officer covenants and agrees that from and
               ---------------
after the date of this Agreement and forever thereafter, he shall keep secret
and confidential, and shall not divulge outside the scope of his employment with
Employer to any person or entity, any information, knowledge or data (the
"Information") whether or not learned or possessed by Officer prior to, on or
after the date of this Agreement, of or pertaining to (i) the Employer, and (ii)
any other person, firm, corporation or business organization with which the
Employer may do business during the Term, that is not in the public domain (and
whether relating to methods, processes, techniques, discoveries, pricing,
marketing or any other matters).

          (b)  Competitive Activity.  Officer acknowledges that his services
               --------------------                                         
pursuant to this Agreement are unique and extraordinary, that the Employer will
be dependent upon Officer for the development and growth of its business and
related functions, and that he will continue to develop personal relationships
with significant customers of the Employer and to have control of confidential
information concerning, and lists of customers of, the Employer.  Officer
further acknowledges the Employer would suffer serious and irreparable harm if
during the term of his employment with the Employer, and within a reasonable
time after the termination of his employment, he should enter into a business
competitive with the Employer.

               Accordingly, in order to protect such legitimate and valuable
interests of the Employer, and in consideration of the Employer's obligations
under this Agreement, it is agreed that until two (2) years following the
termination of the Officer's employment with the Employer (regardless of the
reason for termination even if the termination was not for cause):

               (1)  Officer will not, directly or indirectly, operate, engage
in, render services to, or hold any ownership interest in (whether as an
individual, on his own account or as an employee, consultant, agent, salesman,
officer, director, shareholder, partner or member of any other firm or entity)
(i) any entity or enterprise engaged in any business competitive with that of
the Employer or (ii) any business which is or has at any time been a customer,
supplier or distributor of the Employer; and

               (2)  Officer will not, directly or indirectly, whether on his own
behalf or on behalf of any other person or entity, in any manner (i) solicit the
business of or otherwise contact in any commercial capacity any person or entity
which was a customer, supplier, distributor or competitor of the Employer for
the purpose of obtaining business of the type performed by the Employer, or (ii)
solicit for employment any persons who were officers, shareholders, directors,
department heads, supervisors or sales persons of the Employer in the two (2)
year period prior to the date of termination or during the non-competition
period.

               (3)  Officer agrees that the time period, the geographical area
and the scope of the restrictions contained above, as well as the provisions of
subsections (a) and (b) above, are divisible and severable and that if any of
the foregoing provisions are held invalid by a court of competent jurisdiction,
such provisions shall be deemed modified to the smallest extent necessary to
make them valid and enforceable and the enforceability of the other provisions
shall not be affected in any way.

                                      -3-
<PAGE>
 
         (c)   Remedy for Breach and Modification.  The Officer acknowledges
               ----------------------------------
that the provisions of this Section 6 are reasonable and necessary for the
protection of Employer and that Employer will be irrevocably damaged if these
provisions are not specifically enforced. Accordingly, the Officer agrees that,
in addition to any other relief or remedies available to Employer, Employer
shall be entitled to seek and obtain an appropriate injunction or other
equitable remedy for the purposes of restraining the Officer from any actual or
threatened breach of or otherwise enforcing these provisions and no bond or
security will be required in connection therewith.

     7.   Miscellaneous.
          ------------- 

          (a)  Notices.  Any notice or other communication made or given in
               -------                                                     
connection with this Agreement shall be in writing and shall be deemed to have
been duly given when delivered or mailed by registered mail, return receipt
requested, to a party at his or its address set forth below or at such other
address as a party may specify by notice to the other:

          To the Officer:                 William Pendley            
                                          9 Englishman Court         
                                          Rockville, MD  20854       
                                                                     
          To Employer:                    Clyde Heintzelman
                                          DIGEX, Incorporated        
                                          6800 Virginia Manor Road   
                                          Beltsville, Maryland  20705 


          (b)  Entire Agreement; Amendment.  This Agreement supersedes all prior
               ---------------------------                                      
agreements between the parties with respect to its subject matter, is intended
with the documents referred to herein as a complete and exclusive statement of
the terms of the Agreement between the parties with respect thereto and may be
amended only by a writing signed by both parties hereto.

          (c)  Waiver.  The failure of any party to insist upon strict adherence
               ------                                                           
to any term of this Agreement on any occasion shall not be considered a waiver
or deprive that party of the right thereafter to insist upon strict adherence to
that term or any other term of this Agreement.  Any waiver must be in writing.

          (d)  Assignment.  Except as otherwise provided in this Section 7(d),
               ----------                                                     
this Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, representatives, successors and assigns.
This Agreement shall not be assignable by the Officer.

          (e)  Captions.  The captions in this Agreement are for convenience of
               --------                                                        
reference only and shall not be given any effect in the interpretation of this
Agreement.

                                      -4-
<PAGE>
 
          (f)  Governing Law.  This Agreement and (unless otherwise provided)
               -------------
all amendments hereof and waivers and consents hereunder shall be governed by
the internal law of the State of Maryland, without regard to the conflicts of
law principles thereof. All litigation or arbitration shall be conducted in
Maryland.

          (g)  Survivorship.  The respective rights and obligations of the
               ------------
parties hereunder shall survive any termination of this Agreement to the extent
necessary to the intended preservation of such rights and obligations.

     IN WITNESS WHEREOF, the parties have executed and sealed this Employment
Agreement on the date first above written.

                                DIGEX, Incorporated.              

                                                                          
                                                                          
                                By: /s/ Clyde Heintzelman                 (SEAL)
                                   --------------------------------------
                                      Clyde Heintzelman
                                      Senior Vice President and Chief
                                      Operating Officer
                                                                          
                                                                          
                                   /s/ William Pendley                   (SEAL)
                                ----------------------------------------
                                      William Pendley 
                                      Vice President and Chief Financial
                                      Officer   

                                      -5-

<PAGE>
 
                                 EXHIBIT 23.1

              Consent Of Ernst & Young LLP, Independent Auditors

We consent to the reference to our firm under the caption "Experts" and to the
use of our report dated July 17, 1996, in Amendment No. 1 to the Registration
Statement (Form SB-2 No. 333-05871) and related Prospectus of DIGEX,
Incorporated for the registration of 3,750,000 shares of its common stock.

                                                    ERNST & YOUNG LLP

Baltimore, Maryland
July 19, 1996


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