WARBURG PINCUS & CO
SC 13D, 1996-10-29
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<PAGE>   1





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

                                  SCHEDULE 13D

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934



                                 VitalCom Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                            Common Stock, par value
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                 927917 10 4
                                -------------
                               (CUSIP Number)

                               Stephen Distler
                      E.M. Warburg Pincus & Co., Inc.,
                            466 Lexington Avenue
                          New York, New York 10017
                               (212) 878-0600
- --------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                Communications)

                               - with a copy to -

                                Barry E. Taylor
                        Wilson Sonsini Goodrich & Rosati
                               650 Page Mill Road
                           Palo Alto, CA  94304-1050


                              October 16, 1996
                              ----------------
           (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[ ].


Check the following box if a fee is being paid with the statement [ ] * (A fee
is not required only if the reporting person: (1) has a previous statement on
file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of less than five percent of such
class.) (See Rule 13d-7.)

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

*        A filing fee is not being paid with the statement pursuant to SEC
         Release No. 33-7331 whereby the filing fee has been eliminated for
         Schedule 13D.
<PAGE>   2

                                 SCHEDULE 13D

CUSIP NO. 927917 10 4                                        



- --------------------------------------------------------------------------------
 1    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Warburg, Pincus Ventures, L.P.
      I.D. #13-3784037

- --------------------------------------------------------------------------------
 2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       
                                                                        (a) [ ]
                                                                        (b) [x]

- --------------------------------------------------------------------------------
 3    SEC USE ONLY



- --------------------------------------------------------------------------------
 4    SOURCE OF FUNDS (See Instructions)


      WC
- --------------------------------------------------------------------------------
 5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                                    [ ]



- --------------------------------------------------------------------------------
 6    CITIZENSHIP OR PLACE OF ORGANIZATION


      Delaware
- --------------------------------------------------------------------------------
                               7     SOLE VOTING POWER

          NUMBER OF            
                                     -0-
           SHARES              -------------------------------------------------
                               8     SHARED VOTING POWER                        
        BENEFICIALLY           
                               
          OWNED BY                   3,539,764              
                               ------------------------------------------------
            EACH               9     SOLE DISPOSITIVE POWER
                    
          REPORTING 
                                     -0-
           PERSON              ------------------------------------------------
                               10    SHARED DISPOSITIVE POWER                  
            WITH    
                               
                                     3,539,764
- ------------------------------------------------------------------------------- 
11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


      3,539,764        
- --------------------------------------------------------------------------------
12    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (See Instructions)                                                    [ ]



- --------------------------------------------------------------------------------
13    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


      44.8%        
- --------------------------------------------------------------------------------
14    TYPE OF REPORTING PERSON (See Instructions)


      PN        
- --------------------------------------------------------------------------------



                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                     -2-                                       
<PAGE>   3
                                 SCHEDULE 13D

CUSIP NO. 927917 10 4                                        



- --------------------------------------------------------------------------------
 1    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Warburg, Pincus & Co.
      I.D. #13-635847

- --------------------------------------------------------------------------------
 2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       
                                                                        (a) [ ]
                                                                        (b) [x]

- --------------------------------------------------------------------------------
 3    SEC USE ONLY



- --------------------------------------------------------------------------------
 4    SOURCE OF FUNDS (See Instructions)


      WC
- --------------------------------------------------------------------------------
 5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                                    [ ]



- --------------------------------------------------------------------------------
 6    CITIZENSHIP OR PLACE OF ORGANIZATION


      Delaware
- --------------------------------------------------------------------------------
                               7     SOLE VOTING POWER

          NUMBER OF            
                                     -0-
           SHARES              -------------------------------------------------
                               8     SHARED VOTING POWER                        
        BENEFICIALLY           
                               
          OWNED BY                   3,539,764              
                               ------------------------------------------------
            EACH               9     SOLE DISPOSITIVE POWER
                    
          REPORTING 
                                     -0-
           PERSON              ------------------------------------------------
                               10    SHARED DISPOSITIVE POWER                  
            WITH    
                               
                                     3,539,764
- ------------------------------------------------------------------------------- 
11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


      3,539,764        
- --------------------------------------------------------------------------------
12    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (See Instructions)                                                    [ ]



- --------------------------------------------------------------------------------
13    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


      44.8%        
- --------------------------------------------------------------------------------
14    TYPE OF REPORTING PERSON (See Instructions)


      PN        
- --------------------------------------------------------------------------------



                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                     -3-
                                       
<PAGE>   4
                                 SCHEDULE 13D

CUSIP NO. 927917 10 4                                        



- --------------------------------------------------------------------------------
 1    NAME OF REPORTING PERSON
      S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      E.M. Warburg, Pincus & Co.
      I.D. #13-3536050

- --------------------------------------------------------------------------------
 2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       
                                                                        (a) [ ]
                                                                        (b) [x]

- --------------------------------------------------------------------------------
 3    SEC USE ONLY



- --------------------------------------------------------------------------------
 4    SOURCE OF FUNDS (See Instructions)


      WC
- --------------------------------------------------------------------------------
 5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
      ITEMS 2(d) or 2(e)                                                    [ ]



- --------------------------------------------------------------------------------
 6    CITIZENSHIP OR PLACE OF ORGANIZATION


      Delaware
- --------------------------------------------------------------------------------
                               7     SOLE VOTING POWER

          NUMBER OF            
                                     -0-
           SHARES              -------------------------------------------------
                               8     SHARED VOTING POWER                        
        BENEFICIALLY           
                               
          OWNED BY                   3,539,764              
                               ------------------------------------------------
            EACH               9     SOLE DISPOSITIVE POWER
                    
          REPORTING 
                                     -0-
           PERSON              ------------------------------------------------
                               10    SHARED DISPOSITIVE POWER                  
            WITH    
                               
                                     3,539,764
- ------------------------------------------------------------------------------- 
11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


      3,539,764        
- --------------------------------------------------------------------------------
12    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
      (See Instructions)                                                    [ ]



- --------------------------------------------------------------------------------
13    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


      44.8%        
- --------------------------------------------------------------------------------
14    TYPE OF REPORTING PERSON (See Instructions)


      PN        
- --------------------------------------------------------------------------------



                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                     -4-                                       
<PAGE>   5
                                  SCHEDULE 13D


         This schedule 13D is being filed on behalf of Warburg, Pincus
Ventures, L.P., a Delaware limited partnership ("Ventures"), Warburg, Pincus &
Co., a New York general partnership ("WP"), and E.M. Warburg, Pincus & Company,
a New York general partnership ("E.M. Warburg"), relating to the Common Stock,
par value $.0001 (the "Common Stock"), of VitalCom Inc., a Delaware corporation
(the "Company").  Ventures, WP and E.M. Warburg are hereinafter collectively
referred to as the "Reporting Entities."  Of the Reporting Entities, only
Ventures has acquired direct ownership of voting power relating to the Common
Stock.

Item 1.  Security and Issuer.

         This statement relates to the Company's Common Stock.  The principal 
executive offices of the Company are located at 15222 Del Amo Avenue, Tustin, 
CA 92680.

Item 2.  Identity and Background.

         a.       This statement is filed by Ventures, WP and E.M. Warburg. The
      sole general partner of Ventures is WP. Lionel I. Pincus is the managing 
      partner of WP and may be deemed to control it. E.M. Warburg, which has 
      the same general partners as WP, manages Ventures. WP has a 15% interest 
      in the profits of Ventures as the general partner, and also owns 
      approximately 1.24% of the limited partnership interests in Ventures. The
      general partners of WP and E.M. Warburg are described in Schedule I 
      hereto. Each of the general partners of WP and E.M. Warburg disclaim 
      beneficial ownership (within the meaning of the Securities Exchange Act 
      of 1934, as amended (the "Exchange Act") or otherwise) of the securities.
      The Reporting Entities may be deemed to be a "group" under the Federal 
      securities laws. Lionel I. Pincus disclaims any beneficial ownership of
      the Shares reported herein as being beneficially owned by the Reporting
      Entities. The general partners of WP and E.M. Warburg are described in 
      Schedule I hereto.

         b.       The address of the principal business and principal office of
      each of the Reporting Entities is 466 Lexington Avenue, New York, New 
      York 10017.

         c.       The principal business of Ventures is that of a partnership 
      engaged in making venture capital and related investments. The principal 
      business of WP is acting as general partner of Ventures, Warburg Pincus 
      Investors, L.P., Warburg, Pincus Capital Company, L.P., Warburg, Pincus 
      Capital Partners, L.P., and Warburg, Pincus Associates, L.P., and as a 
      holding company for its ownership of securities of E.M. Warburg, Pincus & 
      Co., Inc., the principal business of which is providing specialized 
      financial advisory and investment counseling services.  The principal 
      business of E.M. Warburg is acting as manager of Ventures and Warburg, 
      Pincus Investors, L.P.

         d.       None of the Reporting Entities, nor, to the best of their 
      knowledge, any of the directors, executive officers or general partners 
      referred to in paragraph (a) has, during the last five years, been 
      convicted in a criminal proceeding (excluding traffic violations or 
      similar misdemeanors).





                                      -5-
<PAGE>   6

         e.       None of the Reporting Entities nor, to the best of their 
      knowledge, any of the directors, executive officers or general partners 
      referred to in paragraph (a) above has, during the last five years, been 
      a party to a civil proceeding of a judicial or administrative body of 
      competent jurisdiction and as a result of such proceeding was or is 
      subject to a judgment, decree or final order enjoining future violations 
      of, or prohibiting or mandating activities subject to, federal or state 
      securities laws or finding any violation with respect to such laws.

         f.       Except as otherwise indicated on Schedule I hereto, each of 
      the individuals referred to in paragraph (a) above is a United States 
      citizen.

Item 3.  Source and Amount of Funds or Other Compensation.

         The total amount of funds required by Ventures to purchase the
Shares (as defined below) was $1,421,252, and was furnished from the working
capital of Ventures.

Item 4.  Purpose of Transaction.

         On October 8, 9, 16 and 22 of 1996, Ventures purchased in the open
market 73,000, 23,000, 102,400 and 62,500 shares of Common Stock of the Company,
respectively, (the "Shares"), at a price per share of $5.13, $5.50, $5.63 and
$5.50, respectively, for an aggregate of 260,900 shares (collectively, the
"Purchase").  Such purchases represent three and one-third percent (3.3%) of the
Company's total outstanding Common Stock.  Prior to the Purchase, the Reporting
Entities owned 3,278,864 shares of, or forty one and one-half percent (41.5%)
of, the Company's Common Stock.

         The Purchase was effected because of the Reporting Entities'
belief that the Company represents an attractive investment.  As a result of
the Purchase, the Reporting Entities are the Company's largest stockholders
and, hence, may be deemed to be "control persons."  Following the Purchase, Ms.
Elizabeth H. Weatherman, who is affiliated with E.M. Warburg, will continue
serving on the Company's Board of Directors.  Ms. Weatherman disclaims
beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act)
of the Common Stock owned by Ventures.  The Reporting Entities presently expect
to limit their involvement in the management of the Company to representation
on the Board of Directors.

         The Reporting Entities may from time to time acquire
additional shares of Common Stock or dispose of shares of Common Stock through
open market or privately negotiated transactions, tender offer or otherwise,
depending on existing market conditions and other considerations discussed
below.  The Reporting Entities intend to review their investment in the Company
on a continuing basis and, depending upon the price and availability of shares
of Common Stock, subsequent developments affecting the Company, the Company's
business and prospects, other investment and business opportunities available
to the Reporting Entities, general stock market and economic conditions, tax
considerations and other factors considered relevant, may decide at any time
not to increase, or to decrease, the size of their investment in the Company.

         Except as set forth herein or in Item 6, none of the Reporting
Entities nor, to the best of their knowledge, any person listed in Schedule I
hereto, has any plans or proposals which relate to or would result in: (a) the
acquisition by any person of additional securities of the Company, or the
disposition of securities of the Company; (b) an extraordinary corporate
transaction, such as a





                                      -6-
<PAGE>   7
merger, reorganization or liquidation, involving the Company or any of its
subsidiaries; (c) a sale or transfer of a material amount of assets of the
Company or any of its subsidiaries; (d) any change in the present Board of
Directors or management of the Company, including any plans or proposals to
change the number or term of directors or to fill any existing vacancies on the
board; (e) any material change in the present capitalization or dividend policy
of the Company; (f) any other material change in the Company's business or
corporate structure; (g) changes in the Company's charter, By-Laws or
instruments corresponding thereto or other actions which may impede the
acquisition of control of the Company by any person; (h) causing a class of
securities of the Company to be delisted from a national securities exchange or
to cease to be authorized to be quoted in an inter-dealer quotation system of a
registered national securities association; (i) a class of equity securities of
the Company becoming eligible for termination of registration pursuant to
Section 12(g)(4) of the Exchange Act; or (j) any action similar to any of those
enumerated above.

Item 5.  Interest in Securities of the Issuer.

         a.       Ventures beneficially owns 3,539,764 shares of Common Stock. 
      By reason of their respective relationships with Ventures, each of the 
      Reporting Entities may be deemed under Rule 13d-3 under the Exchange Act
      to own beneficially all of the shares of Common Stock which Ventures 
      beneficially owns.  Based on information contained in the Company's Form
      10Q (File No. 0-27588), filed with the Securities and Exchange Commission 
      on June 30, 1996, the shares of Common Stock held by the Reporting 
      Entities represent approximately 44.8% of the outstanding shares of 
      Common Stock.

         b.       The Reporting Entities together share the power to vote or to
      direct the vote, and to dispose or to direct the disposition of the 
      Shares held by them.


         c.       None of the Reporting Entities nor, to the best of their 
      knowledge, any person listed in Schedule I hereto, has effected any 
      transactions in the Common Stock during the preceding 60 days.

         d.       Except as set forth in this Item 5, no person other than each
      respective record owner referred to herein of securities is known to have
      the right to receive or the power to direct the receipt of dividends 
      from, or the proceeds from the sale of, such securities.

         e.       Not applicable.

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

         Pursuant to Rule 13d-1(f) promulgated under the Exchange Act,
the Reporting Persons have entered into an agreement with respect to the joint
filing of this statement, and any amendment or amendments hereto, which is
attached hereto as Exhibit 1 and is incorporated herein by reference.

         Except as described herein, there are no contracts,
arrangements, understandings or relationships among the persons named in Item 2
or between such persons and any other person with respect to any securities of
the Company.





                                      -7-
<PAGE>   8
         By virtue of the relationships among the Reporting Entities as
described in Item 2, the Reporting Entities may be deemed to be a "group" under
the Federal securities laws.  Lionel I. Pincus disclaims any beneficial
ownership of the Shares reported herein as being beneficially owned by the
Reporting Entities.

Item 7.  Material to Be Filed as Exhibits.

Joint Filing Agreement.





                                      -8-
<PAGE>   9
                                   SIGNATURE

         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.

Dated: October 25, 1996

                                        WARBURG, PINCUS VENTURES, L.P.

                                        By:     Warburg, Pincus & Co., 
                                                General Partner

                                        By:  /s/  Stephen Distler 
                                            ------------------------------------
                                            Stephen Distler 
                                            Partner


                                        WARBURG, PINCUS & CO.

                                        By:  /s/  Stephen Distler 
                                            ------------------------------------
                                            Stephen Distler 
                                            Partner


                                        E.M. WARBURG, PINCUS & COMPANY

                                        By:  /s/  Stephen Distler 
                                            ------------------------------------
                                            Stephen Distler 
                                            Partner





                                      -9-
<PAGE>   10
                                                                      SCHEDULE I

         Set forth below is the name, position and present principal occupation
of each of the general partners of Warburg, Pincus & Co. ("WP") and E.M.
Warburg, Pincus & Company ("E.M. Warburg").  The sole general partner of
Warburg, Pincus Ventures, L.P. ("Ventures") is WP.  WP, E.M. Warburg and
Ventures are hereinafter collectively referred to as the "Reporting Entities."
Except as otherwise indicated, the business address of each of such persons is
466 Lexington Avenue, New York, New York 10017, and each of such persons is a
citizen of the United States.

                                General Partners
                                     of WP

<TABLE>                                                                        
<CAPTION>                                                                      
                                                                               
                                   Present Principal Occupation in Addition to 
                                   Position with WP, and Positions with the    
 Name                              Reporting Entities                          
- --------------------------------   ------------------------------------------- 
 <S>                               <C>                                         
 Susan Black                       Partner, E.M. Warburg       
                                                               
 Christopher W. Brody              Partner, E.M. Warburg       

 Harold Brown                      Partner, E.M. Warburg       
                                                               
 Errol M. Cook                     Partner, E.M. Warburg       

 W. Bowman Cutter                  Partner, E.M. Warburg       
                                                               
 Elizabeth B. Dater                Partner, E.M. Warburg       

 Stephen Distler                   Partner, E.M. Warburg       
                                                               
 Louis G. Elson                    Partner, E.M. Warburg       

 John L. Furth                     Partner, E.M. Warburg       

 Stuart M. Goode                   Partner, E.M. Warburg       
                                                               
 Stewart K.P. Gross                Partner, E.M. Warburg       

 Patrick T. Hackett                Partner, E.M. Warburg       
                                                               
 Jeffrey A. Harris                 Partner, E.M. Warburg       

 Robert S. Hillas                  Partner, E.M. Warburg       
                                                               
 A. Michael Hoffman                Partner, E.M. Warburg       

 William H. Janeway                Partner, E.M. Warburg       

 Douglas M. Karp                   Partner, E.M. Warburg       
                                                               
 Charles R. Kaye                   Partner, E.M. Warburg       

 Henry Kressel                     Partner, E.M. Warburg       
                                                               
 Joseph P. Landy                   Partner, E.M. Warburg       

 Sidney Lapidus                    Partner, E.M. Warburg       
                                                               
 Reuben S. Leibowitz               Partner, E.M. Warburg       

 Stephen J. Lurito                 Partner, E.M. Warburg       
</TABLE>





                                      -10-
<PAGE>   11
<TABLE>                                                                        
<CAPTION>                                                                      
                                   Present Principal Occupation in Addition to 
                                   Position with WP, and Positions with the    
 Name                              Reporting Entities                          
- --------------------------------   ------------------------------------------- 
 <S>                               <C>                                         
 Spencer S. Marsh III               Partner, E.M. Warburg

 Edward J. McKinley                 Partner, E.M. Warburg                     

 Rodman W. Moorhead III             Partner, E.M. Warburg                     
                                                                              
 Howard H. Newman                   Partner, E.M. Warburg                     

 Anthony G. Orphanos                Partner, E.M. Warburg                     
                                                                              
 Daphne D. Philipson                Partner, E.M. Warburg                     

 Lionel I. Pincus                   Managing Partner, E.M. Warburg; Managing  
                                    Partner, Pincus & Co.                     
                                                                              
 Eugene L. Podsiadlo                Partner, E.M. Warburg                     

 Ernest H. Pomerantz                Partner, E.M. Warburg                     

 Arnold M. Reichma                  Partner, E.M. Warburg                     
                                                                              
 Roger Reinlieb                     Partner, E.M. Warburg                     

 John D. Santoleri                  Partner, E.M. Warburg                     
                                                                              
 Sheila N. Scott                    Partner, E.M. Warburg                     

 Peter Stalker III                  Partner, E.M. Warburg                     
                                                                              
 David A. Tanner                    Partner, E.M. Warburg                     

 James E. Thomas                    Partner, E.M. Warburg                     

 John L. Vogelstein                 Partner, E.M. Warburg                     
                                                                              
 Elizabeth H. Weatherman            Partner, E.M. Warburg                     

 Joanne R. Wenig                    Partner, E.M. Warburg                     
                                                                              
 George U. Wyper                    Partner, E.M. Warburg                     

 Pincus & Co.*

 NL Co. **
</TABLE>

- ------------------
*    New York limited partnership; primary activity is ownership interest
     in WP and E.M. Warburg

**   New York limited partnership; primary activity is ownership interest
     in WP






                                      -11-
<PAGE>   12
                                General Partners
                                of E.M. Warburg

<TABLE>                                                                        
<CAPTION>                                                                      
                                   Present Principal Occupation in Addition to 
                                   Position with WP, and Positions with the    
 Name                              Reporting Entities                          
- --------------------------------   ------------------------------------------- 
 <S>                               <C>                                         
                                                                               
 Susan Black                       Partner, WP

 Christopher W. Brody              Partner, WP                                
                                                                              
 Harold Brown                      Partner, WP                                
                                                                              
 Dale C. Christensen(1)                                      

 Errol M. Cook                     Partner, WP                                
                                                                              
 W. Bowman Cutter                  Partner, WP                                

 Elizabeth B. Dater                Partner, WP                                
                                                                              
 Stephen Distler                   Partner, WP                                

 Louis G. Elson                    Partner, WP                                

 John L. Furth                     Partner, WP                                
                                                                              
 Stuart M. Goode                   Partner, WP                                

 Stewart K.P. Gross                Partner, WP                                
                                                                              
 Patrick T. Hackett                Partner, WP                                

 Jeffrey A. Harris                 Partner, WP                                
                                                                              
 Robert S. Hillas                  Partner, WP                                

 A. Michael Hoffman                Partner, WP                                

 William H. Janeway                Partner, WP                                
                                                                              
 Douglas M. Karp                   Partner, WP                                

 Charles R. Kaye                   Partner, WP                                
                                                                              
 Richard H. King(2)                                                             

 Henry Kressel                     Partner, WP                                
                                                                              
 Joseph P. Landy                   Partner, WP                                

 Sidney Lapidus                    Partner, WP                                
                                                                              
 Reuben S. Leibowitz               Partner, WP                                

 Stephen J. Lurito                 Partner, WP                                

 Spencer S. Marsh III              Partner, WP                                
                                                                              
 Edward J. McKinley                Partner, WP                                

</TABLE>

- -----------------------
    (1)   Citizen of Canada.

    (2)   Citizen of United Kingdom

                                      -12-
<PAGE>   13
<TABLE>                                                                        
<CAPTION>                                                                      
                                   Present Principal Occupation in Addition to
                                   Position with WP, and Positions with the  
 Name                              Reporting Entities                          
- --------------------------------   ------------------------------------------- 
 <S>                               <C>                                         
                                                                               
 Rodman W. Moorhead III            Partner, WP

 Howard H. Newman                  Partner, WP                                

 Anthony G. Orphanos               Partner, WP                                
                                                                              
 Dalip Pathak(1)                                                  

 Daphne D. Philipson               Partner, WP                                
                                                                              
 Lionel I. Pincus                  Managing Partner, WP; Managing Partner,    
                                   Pincus & Co.                               

 Eugene L. Podsiadlo               Partner, WP                                
                                                                              
 Ernest H. Pomerantz               Partner, WP                                

 Arnold M. Reichman                Partner, WP                                

 Roger Reinlieb                    Partner, WP                                
                                                                              
 John D. Santoleri                 Partner, WP                                

 Sheila N. Scott                   Partner, WP                                
                                                                              
 Dominic H. Shorthouse(2)                                                       

 Peter Stalker III                 Partner, WP                                
                                                                              
 David A. Tanner                   Partner, WP                                

 James E. Thomas                   Partner, WP                                

 John L. Vogelstein                Partner, WP                                
                                                                              
 Elizabeth H. Weatherman           Partner, WP                                

 Joanne R. Wenig                   Partner, WP                                
                                                                              
 George U. Wyper                   Partner, WP                                

 Pincus & Co. *
</TABLE>

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

    (1)   Citizen of India.

    (2)   Citizen of the United Kingdom.

     *   New York limited partnership; primary activity is ownership interest
         in WP and E.M. Warburg

                                      -13-
<PAGE>   14
                             JOINT FILING AGREEMENT


         This Agreement dated as of October 24, 1996 among Warburg, Pincus
Ventures, L.P., a Delaware limited partnership; Warburg, Pincus & Co., a New
York general partnership; and E.M. Warburg, Pincus & Company, a New York
general partnership (collectively, the "Reporting Entities").

                              W I T N E S S E T H

         WHEREAS, the Reporting Entities may be required to file a statement,
and amendments thereto, containing the information required by Schedule 13D
pursuant to Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange
Act"), and Rule 13d-1 promulgated thereunder, in connection with the
acquisition of shares of common stock of VitalCom Inc., a Delaware corporation;
and

         WHEREAS, pursuant to Paragraph (f) of Rule 13d-1, the undersigned
desire to satisfy any Schedule 13D filing obligation under Rule 13d-1 by a
single joint filing.

         NOW, THEREFORE, in consideration of the foregoing, the undersigned
hereto agree as follows:

         1.      The undersigned agree that any Statement on Schedule 13D to
which this Agreement is attached, and any Amendments to such Statement, are
filed on behalf of each one of them.

         2.      This Agreement may be executed in any number of counterparts
and all of such counterparts taken together shall be deemed to constitute one
and the same instrument.





                                      -14-
<PAGE>   15
         IN WITNESS WHEREOF, the undersigned have caused this Agreement to be
duly executed and delivered on the date above indicated.



                                        WARBURG, PINCUS INVESTORS, L.P.
                                        BY:  WARBURG, PINCUS & CO.
                                             General Partner



                                        /S/ STEPHEN DISTLER
                                        -----------------------------------
                                        BY:  Stephen Distler, Partner

                                        WARBURG, PINCUS & CO.



                                        /S/ STEPHEN DISTLER
                                        -----------------------------------
                                        BY:  Stephen Distler, Partner

                                        E.M. WARBURG, PINCUS & COMPANY



                                        /S/ STEPHEN DISTLER
                                        -----------------------------------
                                        BY:  Stephen Distler, Partner





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