WATERS CORP /DE/
SC 13G, 1999-03-19
LABORATORY ANALYTICAL INSTRUMENTS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c),
          AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b)

                               (Amendment No.       )(1)

                              Waters Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   941848103
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                  August 18, 1997
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

              /_/    Rule 13d-1(b)

              /_/    Rule 13d-1(c)

              /X/    Rule 13d-1(d)


- ---------------------------------
          (1) 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 the disclosures provided in a prior cover page.

         The information required in 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).


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

         Douglas A. Berthiaume
- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                  (a)  /_/
         N/A      (b)  /X/
- --------------------------------------------------------------------------------
3        SEC USE ONLY


- --------------------------------------------------------------------------------
4        CITIZENSHIP OR PLACE OF ORGANIZATION

         United States of America
- --------------------------------------------------------------------------------
                           5        SOLE VOTING POWER

                                    1,721,205

NUMBER OF   --------------------------------------------------------------------
SHARES                     6        SHARED VOTING POWER
BENEFICIALLY
OWNED BY                            24,944
EACH
REPORTING   --------------------------------------------------------------------
PERSON                     7        SOLE DISPOSITIVE POWER
WITH     
                                    1,721,205

            --------------------------------------------------------------------
                           8        SHARED DISPOSITIVE POWER

                                    24,944
- --------------------------------------------------------------------------------
9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,746,149

10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

         /_/

11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

         5.5%

12       TYPE OF REPORTING PERSON*

         IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



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                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

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ITEM 1(a).   NAME OF ISSUER:

             Waters Corporation

ITEM 1 (b).  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

             34 Maple Street
             Milford, MA 01757

ITEM 2(a).   NAME OF PERSON FILING:

             Douglas A. Berthiaume

ITEM 2(b).   RESIDENCE:

             18 Buttonwood Drive
             Andover, MA 01810

ITEM 2(c).   CITIZENSHIP:

             United States of America

ITEM 2(d).   TITLE OF CLASS OF SECURITIES:

             Common Stock

ITEM 2(e).   CUSIP NUMBER:

             941848103

ITEM 3.      IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR
             13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

             (a)   /_/    Broker or dealer registered under Section 15 of the 
                          Exchange Act;

             (b)   /_/    Bank as defined in Section 3(a)(6) of the Exchange 
                          Act;

             (c)   /_/    Insurance company as defined in Section 3(a)(19) of 
                          the Exchange Act;

             (d)   /_/    Investment company registered under Section 8 of the
                          Investment Company Act;

             (e)   /_/    An investment adviser in accordance with Rule 
                          13d-1(b)(1)(ii)(E);

             (f)   /_/    An employee benefit plan or endowment fund
                          in accordance with Rule 13d-1(b)(1)(ii)(F);

             (g)   /_/    A parent holding company or control person in
                          accordance with Rule 13d-1(b)(1)(ii)(G);

             (h)   /_/    A savings association as defined in Section 3(b) of
                          the Federal Deposit Insurance Act;

             (i)   /_/    A church plan that is excluded from the definition of
                          an investment company


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                          under Section 3(c)(14) of the Investment Company Act;

             (j)   /_/    Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

                   N/A    If this statement is filed pursuant to Rule 13d-1(c), 
                          check this box.                     /_/

ITEM 4.      OWNERSHIP:

             (a)      Amount beneficially owned:     1,746,149

             (b)      Percent of class:        5.5%

             (c)      Number of shares as to which such person has:

                      (i)    Sole power to vote or to direct the vote:  
                             1,721,205

                      (ii)   Shared power to vote or to direct the vote: 24,944

                      (iii)  Sole power to dispose or to direct the disposition 
                             of:   1,721,205

                       (iv)  Shared power to dispose or to direct the 
                             disposition of:   24,944


ITEM 5.      OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

             N/A

ITEM 6.      OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

             N/A

ITEM 7.      IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
             ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING 
             COMPANY:

             N/A

ITEM 8.      IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

             N/A

ITEM 9.      NOTICE OF DISSOLUTION OF GROUP:

             N/A

ITEM 10.     CERTIFICATION:

             N/A



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                                    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.


                                     March 18, 1999
                                     -------------------------------------------
                                     (Date)


                                     /s/ Douglas A. Berthiaume
                                     -------------------------------------------
                                     Douglas A. Berthiaume



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