APPLIED MICRO CIRCUITS CORP
SC 13D, 2000-09-07
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>


                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934


                              MMC NETWORKS, INC.
________________________________________________________________________________
                               (Name of Issuer)


                   Common Stock, $0.001 par value per share
________________________________________________________________________________
                         (Title of Class of Securities)


                                  55308N 10 2
        _______________________________________________________________
                                (CUSIP Number)


                                 David Mersten
                      Applied Micro Circuits Corporation
                              6290 Sequence Drive
                              San Diego, CA 92121
                                (858) 450-9333
________________________________________________________________________________
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                Communications)

                                August 28, 2000
        _______________________________________________________________
            (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].

Note:  Six copies of this statement, including all exhibits, should be filed
with the Commission.  See Rule 13d-1(a) for other parties to whom copies are to
be sent.

The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                              (Page 1 of 9 Pages)

                        (Continued on following pages)
<PAGE>

                                 SCHEDULE 13D
-----------------------                                  ---------------------
 CUSIP NO. 55308N 10 2                                     PAGE 2 OF 9 PAGES
-----------------------                                  ---------------------

------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      Applied Micro Circuits Corporation
      94-2586591
------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2                                                              (a) [_]
                                                                (b) [_]
------------------------------------------------------------------------------
      SEC USE ONLY
 3

------------------------------------------------------------------------------
      SOURCE OF FUNDS
 4
      00
------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(d) or 2(e) [_]
 5
------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6
      Delaware
------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7
     NUMBER OF                 4,920,337

      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                               _______
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9
    REPORTING                  _______

      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                               _______
------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
          4,920,337  -  See Item 5*
------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12
      [_]
------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13
          14.86% - See Item 5**
------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
      CO
------------------------------------------------------------------------------
*  Calculated pursuant to Rule 13d-3 of the Securities Exchange Act of 1934, as
   amended. Includes any rights to acquire beneficial ownership of securities of
   the Issuer within 60 days of the date of the filing of this Schedule 13D.
   Based on the Issuer's Definitive Proxy Statement, dated April 27, 2000.
** Based upon 33,109,850 shares of Common Stock issued and outstanding as
   represented by the Issuer in that certain Agreement and Plan of Merger and
   Reorganization, dated as of August 28, 2000, between the Issuer and the
   Reporting Person.

                                      2.
<PAGE>

Item 1.  Security and the Issuer

         (a)      Title of Security:

                  Common Stock, $0.001 par value per share.

         (b)      Name of the Issuer:

                  MMC Networks, Inc., a Delaware corporation.

         (c)      The Issuer's principal executive office:

                  1134 E. Arques Avenue
                  Sunnyvale, CA  94086

Item 2.  Identity and Background

                           (a)-(c), (f) The name of the corporation filing this
                  statement is Applied Micro Circuits Corporation, a Delaware
                  corporation ("AMCC" or the "Reporting Person"). The Reporting
                  Person's principal business is the design, development,
                  manufacture and support of semiconductor system solutions for
                  high speed transmission and networking systems. The address of
                  the principal executive offices of the Reporting Person is
                  6290 Sequence Drive, San Diego, CA 92121. Set forth on
                  SCHEDULE A is the name of each of the Reporting Person's
                  directors and executive officers as of the date hereof, along
                  with the present principal occupation or employment of such
                  directors and executive officers and the name, principal
                  business and address of any corporation or other organization
                  other than the Reporting Person in which such employment is
                  conducted. To the Reporting Person's knowledge, each person
                  listed on SCHEDULE A is a citizen of the United States, except
                  for Mr. R. Clive Chest who is a citizen of the United Kingdom.

                           (d)-(e) During the last five years neither the
                  Reporting Person nor, to the Reporting Person's knowledge, any
                  person named in SCHEDULE A to this statement, has been
                  convicted in a criminal proceeding (excluding traffic
                  violations or similar misdemeanors). Also during the last five
                  years neither the Reporting Person nor, to the Reporting
                  Person's knowledge, any person named in SCHEDULE A to this
                  statement, was a party to a civil proceeding of a judicial or
                  administrative body of competent jurisdiction as a result of
                  which such person was or is subject to a judgment, decree or
                  final order enjoining future violations of, or prohibiting or
                  mandating activity subject to, federal or state securities
                  laws or finding any violation with respect to such laws.
                  Consequently, neither the Reporting Person nor, to the
                  Reporting Person's knowledge, any person named on SCHEDULE A
                  hereto is required to disclose legal proceedings pursuant to
                  Item 2(d) or 2(e) of Schedule 13D.

                                       3.
<PAGE>

Item 3.  Source and Amount of Funds or Other Consideration

                           On August 27, 2000, the Reporting Person, through its
                  wholly-owned subsidiary Mercury Acquisition Corp., a Delaware
                  corporation ("Merger Sub"), agreed to acquire MMC Networks,
                  Inc., a Delaware corporation ("MMC"), by means of a merger
                  (the "Merger") pursuant to the terms of the Agreement and Plan
                  of Merger and Reorganization, dated as of August 28, 2000,
                  (the "Merger Agreement"), by and among the Reporting Person,
                  Merger Sub and MMC, and subject to the conditions set forth
                  therein (including approval by stockholders of MMC). Pursuant
                  to the Merger Agreement, Merger Sub will merge with and into
                  MMC and MMC will become a wholly-owned subsidiary of the
                  Reporting Person. A copy of the Merger Agreement is attached
                  hereto as EXHIBIT 1 and is incorporated herein by reference.
                  The consummation of the Merger is subject to the approval of
                  the stockholders of MMC, the expiration of the applicable
                  waiting period under the Hart-Scott-Rodino Antitrust
                  Improvements Act of 1976, as amended, and the satisfaction or
                  waiver of certain other conditions as more fully described in
                  the Merger Agreement.

                           As an inducement to the Reporting Person's entering
                  into the Merger Agreement and in consideration thereof, Amos
                  Wilnai, Alexander Jaffe, Douglas Spreng, John Adler, Irwin
                  Federman, Andrew Rappaport, Geoffrey Young, Richard Yonker and
                  Institutional Venture Partners VI, L.P, each of whom are
                  stockholders of MMC (the "Voting Agreement Stockholders"),
                  entered into voting agreements, each dated as of August 28,
                  2000 (each a "Voting Agreement," and collectively, the "Voting
                  Agreements") with the Reporting Person, which agreements are
                  described in more detail in Item 6 below. Pursuant to each
                  Voting Agreement, the applicable Voting Agreement Stockholder
                  agreed to vote, and has granted to certain executives of the
                  Reporting Person an irrevocable proxy (the "Irrevocable
                  Proxy") to vote, all of such Voting Agreement Stockholder's
                  shares of MMC Common Stock in favor of the adoption and
                  approval of the Merger and the Merger Agreement. No capital of
                  the Reporting Person is expected to be expended by the
                  Reporting Person in connection with the exercise of its rights
                  with respect to the 4,920,337 shares of MMC Common Stock
                  covered by the Voting Agreements. The Voting Agreement and the
                  Irrevocable Proxy are attached hereto as EXHIBIT 2 and are
                  incorporated herein by reference.

Item 4.  Purpose of the Transaction

                           (a) - (b) As further described in Item 3 above and
                  Item 6 below, this statement relates to the Merger of Merger
                  Sub, a wholly-owned subsidiary of the Reporting Person, with
                  and into MMC in a statutory merger pursuant to the provisions
                  of the Delaware General Corporation Law. At the effective time
                  of the Merger, the separate existence of Merger Sub will cease
                  and MMC will continue as the surviving corporation (the
                  "Surviving Corporation") and as a wholly-owned subsidiary of
                  the Reporting Person. Holders of outstanding MMC Common Stock
                  will receive, in exchange for each share of MMC Common Stock
                  held by

                                       4.
<PAGE>

                  them, 0.619 of a share (the "Exchange Ratio") of common
                  stock, par value $0.001 per share, of the Reporting Person
                  ("AMCC Common Stock") provided, however, that the
                  maximum number of shares of AMCC Common Stock the Reporting
                  Person will be required to issue will not be greater than that
                  number of shares of AMCC Common Stock equal to 20% of the
                  total outstanding shares of AMCC Common Stock as of the
                  closing of the Merger. Outstanding options and outstanding
                  warrants to purchase shares of MMC Common Stock will be
                  assumed by the Reporting Person at the same Exchange Ratio in
                  the manner set forth in the Merger Agreement. The foregoing
                  summary is qualified in its entirety by reference to the copy
                  of the Merger Agreement attached as EXHIBIT 1 to this Schedule
                  13D, and incorporated herein by reference.

                           As an inducement to the Reporting Person to enter
                  into the Merger Agreement, and as further described in Item 3
                  above and Item 6 below, each Voting Agreement Stockholder,
                  has, by executing a Voting Agreement, agreed to vote the
                  shares of MMC Common Stock beneficially owned by such Voting
                  Agreement Stockholder (including any shares of MMC Common
                  Stock that such stockholder acquires after the time it entered
                  into the Voting Agreement) (collectively, the "Shares") owned
                  by it in favor of the adoption and approval of the Merger and
                  the Merger Agreement. Pursuant to the Voting Agreements, each
                  Voting Agreement Stockholder also irrevocably appointed each
                  of Mr. David Rickey, the Chief Executive Officer of the
                  Reporting Person and Mr. David Mersten, the General Counsel of
                  the Reporting Person, as sole and exclusive attorneys and
                  proxies, with full power of substitution and resubstitution,
                  as his, hers or its lawful attorney and proxy. Such
                  Irrevocable Proxies give the proxy holders the limited right
                  to vote the Shares in favor of the adoption of the Merger
                  Agreement. The Voting Agreement Stockholders retain the right
                  to vote their Shares in their discretion with respect to
                  matters other than those identified in the Voting Agreements.
                  The names of the Voting Agreement Stockholders, the number of
                  shares of MMC Common Stock which, to the Reporting Person's
                  knowledge, are beneficially owned by each such stockholder and
                  the percentage ownership of MMC Common Stock by each such
                  stockholder (as represented to AMCC by MMC in the Merger
                  Agreement) is set forth in SCHEDULE B hereto which is hereby
                  incorporated by reference. The foregoing summary is qualified
                  in its entirety by reference to the copy of the form of Voting
                  Agreement attached as EXHIBIT 2 to this Schedule 13D, which is
                  incorporated herein by reference.

                           (c)  Not applicable.

                           (d)  Not applicable.

                           (e)  Not applicable.

                           (f)  Other than as a result of the Merger described
                  in Item 3 above, not applicable.

                                       5.
<PAGE>

                           (g) At the effective time of the Merger, the
                  Certificate of Incorporation of MMC shall remain unchanged as
                  the Certificate of Incorporation of the Surviving Corporation
                  until thereafter amended. At the effective time of the Merger,
                  the Bylaws of MMC shall remain unchanged as the Bylaws of the
                  Surviving Corporation until thereafter amended.

                           (h) Upon consummation of the Merger, MMC Common Stock
                  will be de-listed from the Nasdaq Stock Market.

                           (i) Upon consummation of the Merger, MMC Common Stock
                  will become eligible for termination of registration under the
                  Securities Exchange Act of 1934, as amended (the "ACT"),
                  pursuant to Section 12(g)(4) of the Act.

                           (j) Other than described above, the Reporting Person
                  currently has no plan or proposal which relate to, or may
                  result in, any of the matters listed in Items 4(a) - (j) of
                  Schedule 13D (although the Reporting Person reserves the right
                  to develop such plans or proposals).

Item 5.  Interest in Securities of the Issuer

                           (a) - (b) As a result and subject to the terms of the
                  Voting Agreements and the Irrevocable Proxies granted pursuant
                  thereto, the Reporting Person has the sole power to vote an
                  aggregate of 4,920,337 shares of MMC Common Stock for the
                  limited purposes described in Item 4 above. Such shares
                  constitute approximately 12% of the issued and outstanding
                  shares of MMC Common Stock based on the number of shares
                  outstanding at August 28, 2000, as represented by the Issuer
                  to the Reporting Person in the Merger Agreement. Other than
                  with respect to the voting rights granted to the Reporting
                  Person pursuant to the Voting Agreements, the Reporting Person
                  does not have the right to vote the Shares on any other
                  matters. The Reporting Person does not share voting power of
                  any additional shares of MMC Common Stock with regard to the
                  limited purposes set forth in Item 4 above and in the Voting
                  Agreements. The Reporting Person does not have any power to
                  dispose or direct the disposition of any shares of MMC Common
                  Stock. To the knowledge of the Reporting Person, no shares of
                  MMC Common Stock are beneficially owned by any of the persons
                  named in SCHEDULE A.

                           (c) Except as described herein, the Reporting Person
                  has not effected any transaction in MMC Common Stock during
                  the past 60 days and, to the Reporting Person's knowledge,
                  none of the persons named in SCHEDULE A has effected any
                  transaction in MMC Common Stock during the past 60 days.

                           (d)  Not applicable.

                           (e)  Not applicable.

                                       6.
<PAGE>

Item 6.  Contracts, Arrangements, Understandings or Relationships with Respect
         to Securities of the Issuer

                           Pursuant to the Merger Agreement and subject to the
                  conditions set forth therein, Merger Sub will merge with and
                  into MMC, and MMC will become a wholly-owned subsidiary of the
                  Reporting Person. Upon consummation of the Merger, Merger Sub
                  will cease to exist as a separate corporation and all of the
                  business, assets, liabilities and obligations of Merger Sub
                  will be assumed by operation of law by MMC as the Surviving
                  Corporation. As a result of the Merger, each outstanding share
                  of MMC Common Stock, other than shares owned by MMC (i.e. MMC
                  treasury shares), Merger Sub, the Reporting Person or any
                  wholly-owned subsidiary of MMC or the Reporting Person, will
                  be converted into the right to receive 0.619 of a share of
                  AMCC Common Stock provided, however, that the maximum number
                  of shares of AMCC Common Stock the Reporting Person will be
                  required to issue will not be greater than that number of
                  shares of AMCC Common Stock equal to 20% of the total
                  outstanding shares of AMCC Common Stock as of the closing of
                  the Merger. Outstanding options and warrants to purchase MMC
                  Common Stock will be assumed by the Reporting Person at the
                  same Exchange Ratio. The foregoing summary of the Merger is
                  qualified in its entirety by reference to the copy of the
                  Merger Agreement included as EXHIBIT 1 to this Schedule 13D
                  and incorporated herein in its entirety by reference.

                           In exercising their rights to vote the Shares as
                  lawful attorneys and proxies of the Voting Agreement
                  Stockholders pursuant to the Voting Agreements, Messrs. Rickey
                  and Mersten, and each of them, as sole and exclusive attorneys
                  and proxies, with full power of substitution and
                  resubstitution, will be limited, at every MMC stockholders
                  meeting and every written consent in lieu of such meeting, to
                  voting the Shares in favor of adoption and approval of the
                  Merger Agreement. The Voting Agreement Stockholders may vote
                  the Shares themselves in all other matters. The Voting
                  Agreements and the Irrevocable Proxies terminate upon the
                  earlier to occur of (i) such date and time as the Merger shall
                  become effective in accordance with the terms of the Merger
                  Agreement or (ii) such date as the Merger Agreement shall be
                  terminated in accordance with its terms (the "Expiration
                  Date"). Each Voting Agreement Stockholder has agreed not to
                  transfer his or her Shares prior to the Expiration Date,
                  except to transferees who agree to be bound by the Voting
                  Agreement provided, however, that Mr. Amos Wilnai, Mr.
                  Alexander Joffe and Mr. Douglas Spreng can transfer up to 5%
                  of their individual holdings of MMC common stock without
                  regard to such restrictions. The terms of the Voting
                  Agreements are more fully described in the Voting Agreement
                  and the Irrevocable Proxy, attached hereto as EXHIBIT 2. Each
                  of the Voting Agreement and the Irrevocable Proxy is
                  incorporated herein by reference.

                           Other than the Merger Agreement and the Voting
                  Agreements, to the knowledge of the Reporting Person, there
                  are no contracts, arrangements, understandings or
                  relationships (legal or otherwise) among the persons named in

                                       7.
<PAGE>

                  Item 2 and between such persons and any person with respect to
                  any securities of MMC, including but not limited to transfer
                  or voting of any of the securities, finder's fees, joint
                  ventures, loan or option arrangement, puts or calls,
                  guarantees of profits, division of profits or loss, or the
                  giving or withholding of proxies.

                           The descriptions herein of the Merger Agreement and
                  the Voting Agreements are qualified in their entirety by
                  reference to such agreements, copies of which are attached
                  hereto as EXHIBITS 1 and 2, respectively.

Item 7.  Material to be Filed as Exhibits

                  The following documents are filed as exhibits:

                  1.     Agreement and Plan of Merger and Reorganization, dated
                         as of August 28, 2000 by and among Applied Micro
                         Circuits Corporation, a Delaware Corporation, Mercury
                         Acquisition Corp., a Delaware corporation and a
                         wholly-owned subsidiary of Applied Micro Circuits
                         Corporation, and MMC Networks, Inc., a Delaware
                         Corporation.

                  2.     Form of Voting Agreement, dated as of August 28, 2000,
                         between Applied Micro Circuits Corporation, a Delaware
                         corporation, and certain stockholders of MMC Networks,
                         Inc., a Delaware corporation.

                                       8.
<PAGE>

                                   SIGNATURES


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


September 6, 2000


                                        Applied Micro Circuits Corporation



                                        By: /s/ WILLIAM E. BENDUSH
                                            ------------------------------
                                            William E. Bendush
                                            Vice President, Treasurer,
                                            CFO and Secretary

                                       9.
<PAGE>

                                   SCHEDULE A

                       DIRECTORS AND EXECUTIVE OFFICERS OF
                       APPLIED MICRO CIRCUITS CORPORATION

<TABLE>
<CAPTION>

Name and Business Address            Principal Occupation or Employment
-------------------------            ----------------------------------
<S>                                  <C>
David M. Rickey                      Chairman of the Board, President and Chief Executive Officer of the
6290 Sequence Drive                  Reporting Person
San Diego, CA 92121

William K. Bowes, Jr.                General Partner of U.S. Venture Partners
6290 Sequence Drive
San Diego, CA 92121

R. Clive Ghest                       Principal of Ghest
6290 Sequence Drive
San Diego, CA 92121

Franklin P. Johnson, Jr.             General Partner of Asset Management Company
6290 Sequence Drive
San Diego, CA 92121

S. Atiq Raza                         President and Chief Executive Officer of Raza Foundries, Inc.
6290 Sequence Drive
San Diego, CA 92121

Roger A. Smullen, Sr.                Vice-Chairman of the Board of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Arthur B. Stabenow                   Retired
6290 Sequence Drive
San Diego, CA 92121

Harvey P. White                      Chairman, President and Chief Executive Officer of Leap
6290 Sequence Drive                  Wireless International
San Diego, CA 92121

</TABLE>


<PAGE>

<TABLE>
<CAPTION>

Name and Business Address            Principal Occupation or Employment
-------------------------            ----------------------------------
<S>                                  <C>

William E. Bendush                   Vice President, Treasurer, Chief Financial Officer
6290 Sequence Drive                  and Secretary of the Reporting Person
San Diego, CA 92121

Keneth L. Clark                      Vice President, Operations of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Candace H. Kilburn                   Vice President, Human Resources of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Brent E. Little                      Vice President, Marketing of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Gary D. Martin                       Chief Technical Officer, Digital Products of the Reporting
6290 Sequence Drive                  Person
San Diego, CA 92121

Stephen M. Smith                     Vice President, Business Development of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Ramakrishna R. Sudireddy             Vice President, Digital Products of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Thomas L. Tullie                     Vice President, Sales and Foundry Manager of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121

Gregory A. Winner                    Vice President, Engineering of the Reporting Person
6290 Sequence Drive
San Diego, CA 92121
</TABLE>

                                      2.
<PAGE>

                                   SCHEDULE B

                               MMC NETWORKS, INC.
                          VOTING AGREEMENT STOCKHOLDERS


                 (The information in this Schedule is based on
                      information provided to AMCC by MCC)

<TABLE>
<CAPTION>

                                                           Total Shares                    Percent of
     Name of Beneficial Owner                           Beneficially Owned(6)         Outstanding Shares(1)
     ------------------------                        -------------------------        ----------------------
<S>                                                  <C>                              <C>
Alexander Joffe(2).................................                1,521,124                   4.6%
Amos Wilnai(3).....................................                1,308,209                   4.0%
Douglas C. Spreng(4)...............................                  292,603                     *
Ari Birger.........................................                   12,527                     *
Richard C. Yonker..................................                      --                      *
Geoffrey Y. Yang(5)................................                  147,821                     *
Andrew S. Rappaport................................                  135,983                     *
Irwin Federman.....................................                   98,040                     *
John G. Adler......................................                   42,708                     *
Institutional Venture Partners VI LLP .............                1,261,322                  3.81%
</TABLE>

-----------------
*    Less than 1%

(1)  Based on 33,109,850 shares of MMC Networks, Inc. Common Stock issued and
     outstanding as reported by MMC Networks, Inc. to the Reporting Person in
     that certain Agreement and Plan of Merger and Reorganization dated as of
     August 28, 2000.

(2)  Includes 9,000 shares held by Mr. Joffe's minor children, as to which Mr.
     Joffe disclaims beneficial ownership.

(3)  Represents shares held by Amos Wilnai and Ruth Wilnai, Trustees of the
     Wilnai Family Trust U/D/T dated June 10, 1997. Does not include 1,039,456
     shares held by each of Nitzan Wilnai, Sigal Wilnai and Yael Wilnai, Mr.
     Wilnai's adult children. Also does not include 113,205 shares held by
     Miriam Wilnai, Mr. Wilnai's mother. Mr. Wilnai disclaims beneficial
     ownership of all these shares.

(4)  Does not include 300 shares held by Mr. Spreng's son, as to which Mr.
     Spreng disclaims beneficial ownership.

(5)  Does not include 1,261,322 shares beneficially owned by Institutional
     Venture Partners VI, L.P., 18,114 shares held by Institutional Venture
     Management VI, L.P., and 36,226 shares held by IVP Founders Fund I, L.P. As
     a General Partner of Institutional Venture Management VI, L.P., which is
     the General Partner of each of such limited partnerships, Mr. Yang may be
     deemed to share voting and investment power with respect to these shares.
     However, Mr. Yang disclaims beneficial ownership of these shares except to
     the extent of his pecuniary interest in these partnerships.

(6)  Based on the Issuer's Definitive Proxy Statement, dated April 27, 2000.
<PAGE>

                                  EXHIBIT INDEX


Exhibit   Description of Document
-------   -----------------------
     1.   Agreement and Plan of Merger and Reorganization, dated as of August
          28, 2000 by and among Applied Micro Circuits Corporation, a Delaware
          Corporation, Mercury Acquisition Corp., a Delaware corporation and a
          wholly-owned subsidiary of Applied Micro Circuits Corporation, and MMC
          Networks, Inc., a Delaware Corporation.

     2.   Form of Voting Agreement, dated as of August 28, 2000, between Applied
          Micro Circuits Corporation, a Delaware corporation, and certain
          stockholders of MMC Networks, Inc., a Delaware corporation.


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