CENTIGRAM COMMUNICATIONS CORP
8-K, 1999-10-27
TELEPHONE & TELEGRAPH APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington. D.C. 20549

                                    Form 8-K

                Current Report Pursuant to Section 13 or 15(d) of

                           The Securities Act of 1934

                                October 22, 1999

                Date of Report (Date of earliest event reported)

                      CENTIGRAM COMMUNICATIONS CORPORATION
             (Exact name of registrant as specified in its charter)

        Delaware                        0-19558                  94-2418021
(State or other jurisdiction    (Commission File Number)      (I.R.S. Employer
    of incorporation)                                        Identification No.)

- --------------------------------------------------------------------------------


                              91 East Tasman Drive

                               San Jose, CA 95134
                    (Address of principal executive offices)

                                 (408) 944-0250
              (Registrant's telephone number, including area code)

                                 Not Applicable
              (Former name or address, if change since last report)

Item 5:   Other Events.

     1.   On   October   22,   1999,   Centigram   Communications    Corporation
          ("Centigram")  amended its  Preferred  Shares Rights  Agreement  dated
          October 20, 1992, to exclude Kopp Investment  Advisors,  Inc. ("KIA"),
          LeRoy C. Kopp ("LCK"),  the Kopp Emerging Growth Fund ("KEGF") and the
          Kopp Holding Company ("KHC" and,  collectively with KIA, LCK and KEGF,
          the "Kopp  Entities" and each a "Kopp  Entity") from the definition of
          "Acquiring Person" provided and only for so long as (i) on or prior to
          May 30, 2000, no Kopp Entity  beneficially  owns in excess of 28.3% of
          the Common Stock of  Centigram  then  outstanding;  (ii) after May 30,
          2000, no Kopp Entity  beneficially owns in excess of 25% of the Common
          Stock of Centigram then outstanding; (iii) KIA and KECG continue to be
          entitled to file reports of  beneficial  ownership of the Common Stock
          of Centigram  on Schedule  13G  pursuant to Section  13(d) and Section
          13(g) of the  Securities  Exchange Act of 1934 (the  "Exchange  Act");
          (iv)  except  as   otherwise   required  by  Rule   13d-1(b)(1)(ii)(G)
          promulgated under the Exchange Act, LK and KHC continue to be entitled
          to file  reports  of  beneficial  ownership  of the  Common  Stock  of
          Centigram on Schedule 13G pursuant to Section  13(d) and Section 13(g)
          of  the  Exchange  Act;  (v) LK and  KHC do not  own in the  aggregate
          (directly or indirectly  through IRAs and trusts) in excess of 1.7% of
          the Common  Stock of  Centigram  then  outstanding;  and (vi) the Kopp
          Entities  continue to be in compliance with the letter agreement dated
          as of October  8, 1999  among the Kopp  Entities  and  Centigram  (the
          "Letter  Agreement").  The  Letter  Agreement  requires,  among  other
          things,  that (i) no later than May 30,  2000,  each Kopp Entity shall
          decrease  its  aggregate  beneficial  ownership  of  Common  Stock  of
          Centigram  to a number of shares  representing  no greater than 25% of
          the  outstanding  shares of Common Stock of Centigram and (ii) KIA and
          KECG shall continue to hold shares of Common Stock of Centigram solely
          as Schedule  13G filers and shall file on Schedule 13G as long as they
          are entitled to file on Schedule  13G. A copy of the Third  Supplement
          to  Centigram  Communications   Corporation  Preferred  Shares  Rights
          Agreement is filed herewith as Exhibit 4.1.

Item 7.   Financial Statements and Exhibits.

          (c)  Exhibits.

               4.1  - Third Supplement to Centigram  Communications  Corporation

                       Preferred Shares Rights Agreement.


<PAGE>



                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                           CENTIGRAM COMMUNICATIONS CORPORATION

Dated: October 27, 1999                    By: /s/  Thomas Brunton
                                               Thomas Brunton
                                               Senior Vice President and
                                                  Chief Financial Officer


<PAGE>



                                INDEX TO EXHIBITS

                                                                    SEQUENTIALLY

EXHIBIT                                                               NUMBERED
 NUMBER              DESCRIPTION                                        PAGE

- --------------------------------------------------------------------------------
  4.1        Third Supplement to Centigram Communication                 5
             Corporation Preferred Shares Rights Agreement






<PAGE>


                                                                     Exhibit 4.1

            THIRD SUPPLEMENT TO CENTIGRAM COMMUNICATIONS CORPORATION

                        PREFERRED SHARES RIGHTS AGREEMENT

     This Third Supplement to the Centigram Communications Corporation Preferred
Shares Rights Agreement (the "Supplement")  amends the Centigram  Communications
Corporation  Preferred  Shares Rights Agreement dated as of October 20, 1992, as
previously  amended by the  Supplement to Centigram  Communications  Corporation
Preferred  Shares Rights  Agreement  dated as of October 20, 1992 and the Second
Supplement  to Centigram  Communications  Corporation  Preferred  Shares  Rights
Agreement  dated  as of  January,  1995  (as  amended,  the  "Agreement").  This
Supplement is entered into by and between Centigram Communications  Corporation,
a Delaware  corporation  ("Centigram"),  and American  Stock  Transfer and Trust
Company, as Rights Agent (the "Agent"), pursuant to Section 27 of the Agreement.

     Section 1(a) of the Agreement is hereby  amended to read in its entirety as
follows:

     (a)  "Acquiring  Person" shall mean any Person who or which,  together with
          all Affiliates and Associates of such Person,  shall be the Beneficial
          Owner of 15% or more of the Common Shares then outstanding,  but shall
          not include the Company, any Subsidiary of the Company or any employee
          benefit plan of the Company or of any  Subsidiary of the Company,  any
          entity  holding Common Shares for or pursuant to the terms of any such
          plan.  In  addition,   "Acquiring   Person"  shall  not  include  Kopp
          Investment  Advisors,  Inc. ("KIA"),  LeRoy C. Kopp ("LCK"),  the Kopp
          Emerging  Growth Fund ("KEGF") or the Kopp Holding Company ("KHC" and,
          collectively  with KIA, LCK and KEGF,  the "Kopp  Entities" and each a
          "Kopp Entity") provided and only for so long as (i) on or prior to May
          30, 2000, no Kopp Entity  beneficially  owns in excess of 28.3% of the
          Common  Shares of the  Company  then  outstanding;  (ii) after May 30,
          2000, no Kopp Entity  beneficially owns in excess of 25% of the Common
          Shares of the Company then outstanding; (iii) KIA and KECG continue to
          be  entitled to file  reports of  beneficial  ownership  of the Common
          Shares of the Company on Schedule  13G  pursuant to Section  13(d) and
          Section 13(g) of the Exchange  Act; (iv) except as otherwise  required
          by Rule 13d-1(b)(1)(ii)(G)  promulgated under the Exchange Act, LK and
          KHC continue to be entitled to file reports of beneficial ownership of
          the Common  Shares of the Company on Schedule  13G pursuant to Section
          13(d) and Section 13(g) of the Exchange Act; (v) LK and KHC do not own
          in the aggregate  (directly or indirectly  through IRAs and trusts) in
          excess of 1.7% of the Common  Shares of the Company then  outstanding;
          and (vi) the Kopp Entities continue to be in compliance with all other
          terms of the  letter  agreement  dated as of October 8, 1999 among the
          Kopp Entities and the Company (a copy of which is attached hereto), as
          determined  by a majority of the  Continuing  Directors  in their sole
          discretion.  Notwithstanding the foregoing,  no Person shall be deemed
          to be an Acquiring  Person either (i) as the result of an  acquisition
          of Common  Shares by the  Company  which,  by  reducing  the number of
          shares  outstanding,  increases  the  proportionate  number  of shares
          beneficially  owned by such Person to 15% or more of the Common Shares
          of the Company then outstanding;  provided, however, that if a Person,
          other than those  entities  described in the foregoing two  sentences,
          shall become the Beneficial  Owner of 15% or more of the Common Shares
          of the Company then  outstanding  by reason of share  purchases by the
          Company and shall,  after such share purchases by the Company,  become
          the Beneficial  Owner of any additional  Common Shares of the Company,
          then such Person shall be deemed to be an Acquiring Person, or (ii) if
          within  eight  days  after  such  Person  would  otherwise  become  an
          Acquiring  Person (but for the  operation of this clause  (ii)),  such
          Person  notifies  the  Board of  Directors  that  such  Person  did so
          inadvertently and within two days after such notification, such Person
          is the  Beneficial  Owner of less than 15% of the  outstanding  Common
          Shares.

     Except as amended  hereby,  the  Agreement  shall  remain in full force and
effect.

     IN WITNESS  WHEREOF,  the parties hereto have caused this  Supplement to be
executed effective as of October 22, 1999.

                                    CENTIGRAM COMMUNICATIONS CORPORATION
                                    By:      /s/  Thomas Brunton

                                    Name:    Thomas Brunton

                                    Title:   Sr. VP and Chief Financial Officer

                                    AMERICAN STOCK TRANSFER AND TRUST COMPANY

                                    By:      /s/  Herbert J. Lemmer

                                    Name:    Herbert J. Lemmer

                                    Title:   Vice President


<PAGE>




                      Centigram Communications Corporation

                              91 East Tasman Drive

                           San Jose, California 95134

                                 October 8, 1999

LeRoy C. Kopp
Kopp Investment Advisors, Inc.
Kopp Emerging Growth Fund
Kopp Holding Company
7701 France Avenue S., Suite 500
Edina, Minneapolis 55435

         Re:  Stockholder Rights Plan

Ladies and Gentlemen:

     Centigram Communications Corporation, a Delaware corporation ("Centigram"),
is advised by Kopp  Investment  Advisors,  Inc.  ("KIA") that (i) KIA  currently
beneficially  owns  approximately  26.8%  of the  outstanding  Common  Stock  of
Centigram;  (ii) LeRoy C. Kopp ("LK")  currently  owns  directly (or  indirectly
through IRAs and trusts)  approximately  1.3% of the outstanding Common Stock of
Centigram and beneficially owns  approximately  28.2% of the outstanding  Common
Stock of  Centigram;  (iii) the Kopp  Emerging  Growth Fund  ("KEGF")  currently
beneficially  owns  approximately  5.6%  of  the  outstanding  Common  Stock  of
Centigram;  and (iv) the Kopp Holding Company ("KHC" and collectively  with KIA,
LK and KEGF, the "Kopp  Entities" and each a "Kopp Entity")  currently  holds no
shares of Common Stock of Centigram and beneficially owns approximately 26.8% of
the  outstanding  Common  Stock of  Centigram.  LK and KIA have each  previously
provided to  Centigram  assurances  (which  assurances  are  confirmed  by their
signatures  below) that KIA and KEGF  acquired  such shares of Centigram  Common
Stock,  and are  holding  and will hold such  shares,  solely as a Schedule  13G
filer,  and, to the extent they acquire  additional  shares of Centigram  Common
Stock,  such shares will be acquired and held solely as a Schedule 13G filer. In
addition,  LK and KHC also have each previously provided to Centigram assurances
(which  assurances  are  confirmed  by their  signatures  below) that LK and KHC
acquired such shares of Centigram  Common  Stock,  and are holding and will hold
such shares,  solely as a Schedule 13G filer (except to the extent,  and only to
the  extent,  that they are  required  to file a Schedule  13D  pursuant to Rule
13d-1(b)(1)(ii)(G))  promulgated  under the Securities  Exchange Act of 1934, as
amended (the "Exchange Act") because their ineligible interest exceeds 1% of the
class,  and, to the extent they acquire  additional  shares of Centigram  Common
Stock, such shares will be acquired and held solely as a Schedule 13G filer. For
purposes of this letter agreement, a "Schedule 13G filer" shall mean a person or
entity  entitled to file reports of beneficial  ownership of the Common Stock of
Centigram  on Schedule 13G  pursuant to Section  13(d) and Section  13(g) of the
Exchange Act.

     LK and KIA have each  previously  provided to Centigram  assurances  (which
assurances  are confirmed by their  signatures  below) that the Kopp Entities do
not have voting  power over  approximately  65% the shares of  Centigram  Common
Stock that KIA beneficially owns.

     Based  upon  these  representations,  and the  covenants  set forth  below,
Centigram is willing,  subject to approval of this  arrangement  by  Centigram's
Board of Directors,  to amend its stockholder rights plan (the "Plan") to exempt
the Kopp Entities from the  definition of an "Acquiring  Person" under the Plan,
which could give rise to the triggering of rights under the Plan, so long as (i)
on or prior to May 30, 2000,  no Kopp Entity  acquires  beneficial  ownership of
shares in excess of 28.3% of the Common  Stock of  Centigram  then  outstanding;
(ii) after May 30, 2000,  no Kopp Entity  beneficially  owns in excess of 25% of
the  Common  Stock of  Centigram  then  outstanding;  (iii)  KIA and KECG  shall
continue to be entitled to file  reports of  beneficial  ownership of the Common
Stock of Centigram on Schedule 13G pursuant to Section  13(d) and Section  13(g)
of  the   Exchange   Act;   (iv)   except   as   otherwise   required   by  Rule
13d-1(b)(1)(ii)(G) promulgated under the Exchange Act, LK and KHC shall continue
to be entitled to file  reports of  beneficial  ownership of the Common Stock of
Centigram  on Schedule 13G  pursuant to Section  13(d) and Section  13(g) of the
Exchange Act; (v) LK and KHC do not own in the aggregate (directly or indirectly
through IRAs and trusts) in excess of 1.7% of the Common Stock of Centigram then
outstanding;  and (vi) the Kopp Entities shall continue to be in compliance with
all other terms of this letter agreement.

     As  consideration  for such  amendment,  Centigram  requests  that the Kopp
Entities confirm the following agreements:

     1.   KIA and KECG shall  continue to hold shares of Centigram  Common Stock
          solely  as  Schedule  13G  filers  and  shall  file  on  Schedule  13G
          (notwithstanding the availability of Schedule 13D) as long as they are
          entitled  to  file on  Schedule  13G.  At such  time as KIA or KECG is
          required to file a report of beneficial ownership on Schedule 13D, the
          exception for the Kopp  Entities from the  definition of an "Acquiring
          Person" under the Plan shall terminate.

     2.   At such time as LK or KHC is required  to file a report of  beneficial
          ownership  on  Schedule  13D for any  reason  other  than as  required
          pursuant to Rule  13d-1(b)(1)(ii)(G)  promulgated  under the  Exchange
          Act, the exception  for the Kopp  Entities  from the  definition of an
          "acquiring person" under the Plan shall terminate.

     3.   Except as otherwise  required by law, the Kopp Entities shall not vote
          the shares of  Centigram  Common  Stock upon KIA's  discretion  on any
          matter brought before the stockholders of Centigram,  but rather shall
          vote,  if at all,  the shares  solely as directed by KIA's  respective
          clients.  The Kopp  Entities  will not make or  endorse,  directly  or
          indirectly,  any  recommendation to the beneficial owners with respect
          to the voting of the shares.

     4.   In the  event  that any Kopp  Entity  proposes  to sell in a bona fide
          transaction any shares of Common Stock of Centigram (other than a sale
          in a  "broker's  transaction"  or in a  transaction  directly  with  a
          "market  maker," in either  case in a manner of sale  consistent  with
          paragraph  (f) of Rule 144  promulgated  under the  Securities  Act of
          1933, as amended),  then the Kopp Entities  shall provide to Centigram
          not  less  than  ten  (10)  days  written   notice  of  such  proposed
          transaction,  specifying the number of shares proposed to be sold, the
          price at which the shares are to be sold and the proposed purchaser of
          such shares.

     5.   Each Kopp Entity  agrees that,  no later than May 30,  2000,  it shall
          decrease its aggregate  beneficial ownership of Centigram Common Stock
          to a  number  of  shares  representing  no  greater  than  25%  of the
          outstanding  shares of Common Stock of Centigram;  provided,  however,
          that if any Kopp Entity shall be the  beneficial  owner of 25% or more
          of the Common Stock of Centigram outstanding on May 30, 2000 by reason
          of share purchases by Centigram after the date hereof and prior to May
          30,  2000,  then (i) such Kopp Entity  shall  notify  Centigram of the
          percentage  of the  Common  Stock  of  Centigram  of  which  it is the
          beneficial  owner;  and (ii)  within  five  trading  days  after  such
          notification,  such Kopp Entity shall sell such number of shares as is
          necessary to reduce its  beneficial  ownership to not more than 25% of
          the outstanding shares of Common Stock of Centigram.

     6.   Each Kopp Entity  agrees that, at such time as it has it decreased its
          aggregate  beneficial  ownership of Centigram Common Stock to a number
          of shares representing 25% or less of the outstanding shares of Common
          Stock of  Centigram,  it shall not increase its  aggregate  beneficial
          ownership of Centigram Common Stock to a number of shares representing
          greater  that  25%  of the  outstanding  shares  of  Common  Stock  of
          Centigram  without the prior written consent of the Board of Directors
          of Centigram.

     7.   LK and KHC  agree  that  they  shall  not  increase  their  collective
          aggregate  ownership  (directly or indirectly through IRAs and trusts)
          of Centigram Common Stock to a number of shares  representing  greater
          that  1.7% of the  outstanding  shares of  Common  Stock of  Centigram
          without  the  prior  written  consent  of the  Board of  Directors  of
          Centigram.

     For  purposes  of this  letter  agreement,  beneficial  ownership  shall be
          determined  in accordance  with Section 1(c) of the Plan.  This letter
          agreement  shall terminate when (i) no Kopp Entity  beneficially  owns
          15% or more of the outstanding  shares of Centigram  Common Stock; and
          (ii)  Section  1(a)  of the  Plan  has  been  amended  to  delete  all
          references to all Kopp Entities.  This letter agreement supercedes and
          terminates that certain letter agreement dated January 13, 1995 by and
          between Centigram and KIA.

     If the  foregoing  is  consistent  with your  understanding  of our  mutual
agreement,  please countersign below where indicated.  We shall then submit this
proposal  to the  Board of  Directors  of  Centigram  for  approval.  Upon  your
signature  and approval by the Board of Directors of  Centigram,  this  proposal
shall become the binding agreement of Centigram and the Kopp Entities.


<PAGE>



                                         Very truly yours,

                                         CENTIGRAM COMMUNICATIONS CORPORATION

                                         By:      /s/ Thomas Brunton
                                              Thomas Brunton, Sr. Vice President

                                                   and Chief Financial Officer

The foregoing is hereby accepted:

Kopp Investment Advisors, Inc.

By:      /s/ LeRoy C. Kopp
Name:  LeRoy C. Kopp
Title:    CEO and President

Kopp Emerging Growth Fund

By:      /s/ LeRoy C. Kopp
Name:  LeRoy C. Kopp
Title:    CEO and President

Kopp Holding Company

By:      /s/ LeRoy C. Kopp
Name:  LeRoy C. Kopp
Title:    CEO and President

  /s/ LeRoy C. Kopp
  LeRoy C. Kopp


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