<SUBMISSION>
<ACCESSION-NUMBER>0001224648-03-000001
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20030401
<FILING-DATE>20030403
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>WATERS CORP /DE/
<CIK>0001000697
<ASSIGNED-SIC>3826
<IRS-NUMBER>133668640
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-14010
<FILM-NUMBER>03637923
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>34 MAPLE ST
<CITY>MILFORD
<STATE>MA
<ZIP>01757
<PHONE>5084782000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>34 MAPLE STREET
<CITY>MILFORD
<STATE>MA
<ZIP>01757
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>WCD INVESTORS INC /DE/
<DATE-CHANGED>19960605
</FORMER-COMPANY>
</SUBJECT-COMPANY>
<REPORTING-OWNER>
<COMPANY-DATA>
<CONFORMED-NAME>BEAUDOUIN MARK T
<CIK>0001224648
<RELATIONSHIP>OFFICER
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>3
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>C/O PAREXEL INTERNATIONAL CORP
<STREET2>195 WEST ST
<CITY>WALTHAM
<STATE>MA
<ZIP>02451
<PHONE>7814344158
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>195 WEST STREET
<CITY>WALTHAM
<STATE>MA
<ZIP>02451
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary.htm
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<table border="0" cellspacing="0" cellpadding="0" width="1050"> <tr> <td align="center" width="15%"> <font face="arial,helvetica" size="5"><b>FORM 3</b></font> </td> <td align="center" width="60%"><b>UNITED STATES SECURITIES AND EXCHANGE COMMISSION<BR>Washington, DC 20549<P> INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES</b><P> Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940 </td> <td width="5%">&nbsp;</td> <td width="20%"> <font size="2">OMB APPROVAL</font><br> <font size="2">OMB Number: 3235-0104</font><br> <font size="2">Expires: January 31, 2005</font><br> <font size="2">Estimated average burden<br>hours per response. ... 0.5</font> </td> </tr> <tr> <td colspan="2"> <font size=2>(Print or Type Responses)</font> </td> <td colspan="2"><br></td> </tr> </table> <P> <table border="1" cellspacing="0" cellpadding="4" width="1050"> <tr> <td colspan="4"> <font size=2>1. Name and Address of Reporting Person*</font><p> Beaudouin Mark </td> <td valign="top" rowspan="2"> <font size="2">2. Date of Event<br> Requiring Statement<br>(Month/Day/Year)<br><br></font> 04/01/03 </td> <td valign="top" colspan="3" rowspan="2"> <font size=2>4. Issuer Name <b>and</b> Ticker or Trading Symbol<P></font> Waters Corp. WAT </td> </tr> <tr> <td align=left valign=top colspan=4> <font size="1">&nbsp;(Last) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;(First) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;(Middle) <br><br></font> 34 Maple Street </td> </tr> <tr> <td align="left" valign=top colspan=3> <font size="1">&nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;(Street)<br><br><br><br><br><br></font> Milford MA 01757 </td> <td valign="top" rowspan="2"> <font size=2> 3. I.R.S. Identification Number of Reporting Person, if an entity (voluntary)</font> <br><br> </td> <td vAlign="top" colSpan="2" rowSpan="2"> <font size="2">5. Relationship of Reporting Person(s) to Issuer</font><br> <font size="1">(Check all applicable)</font> <br> <font size="2"><u>&nbsp;&nbsp;&nbsp;&nbsp;</u></font> <font size="2">Director</font> <font size="2"><u>&nbsp;&nbsp;&nbsp;&nbsp;</u></font> <font size="2">10% Owner</font> <br> <font size="2"><u>&nbsp;<b>X</b>&nbsp;</u></font> <font size="2">Officer </font> <font size="1">(give title below)</font> <font size="2"><u>&nbsp;&nbsp;&nbsp;&nbsp;</u></font> <font size="2">Other</font> <font size="1">(specify below)</font> <p> <font size="2">VP and General Counsel</font> </td> <td valign="top" colspan="2" > <font size=2>6. If Amendment, Date of Original (Month/Day/Year)<P></font>  </td> </tr> <tr> <td align="left" valign=top colspan=3> <font size="1">(City) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;(State) &nbsp; &nbsp; &nbsp; &nbsp; (Zip)</font> </td> <td valign="top" colspan="2"> <font size="2">7. Individual or Joint/Group Filing <br>(Check Applicable Line)</font> <br> <font size="2"><u>&nbsp;<b>X</b>&nbsp;</u></font> <font size="2">Form filed by One Reporting Person</font> <br> <font size="2"><u>&nbsp;&nbsp;&nbsp;&nbsp;</u></font> <font size="2">Form filed by More than One Reporting Person</font> </td> </tr> <tr> <td align="center" colspan="8"> <font size="2"><b> Table I &#151 Non-Derivative Securities Beneficially Owned</b></font> </td> </tr> <tr> <td valign="top" colspan="3"><font size=2>1. Title of Security<br>(Instr. 4)</font></td> <td valign=top colspan=2><font size=2>2. Amount of Securities<br> Beneficially Owned<br>(Instr. 4)</font></td> <TD valign=top colspan=2><font size=2>3.Ownership Form:<br>Direct (D) or Indirect (I)<br>(Instr. 5)</font></td> <TD valign=top><font size=2>4.Nature of Indirect Beneficial Ownership<br>(Instr. 5)</font> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td colspan="3">&nbsp;</td> <td colspan="2">&nbsp;</td> <td colspan="2">&nbsp;</td> <td >&nbsp;</td> </tr> <tr> <td align="center" colspan="8"><font size="2"><b>Table II &#151 Derivative Securities Beneficially Owned (<i>e.g.</i>, puts, calls, warrants, options, convertible securities)</font> </td> </tr> <tr> <td valign="top" rowspan="2"><font size="2">1. Title of Derivative Security<br>(Instr. 4)</font></td> <td valign="top" colspan="2"><font size="2">2. Date Exercisable and<br>Expiration Date<br>(Month/Day/Year)</font></td> <td valign="top" colspan=2><font size="2">3. Title and Amount of <br>Securities Underlying<br>Derivative Security<br>(Instr. 4)</font></td> <td valign="top" rowspan=2><font size="2">4.Conversion or Exercise Price of Derivative Security</font></td> <td valign="top" rowspan=2><font size="2">5.Ownership Form of Derivative Securities: Direct(D) or <br>Indirect (I)<br>(Instr. 5)</font></td> <td valign="top" rowspan=2><font size="2">6. Nature of Indirect<br>Beneficial Ownership<br> (Instr. 5)</font></td> </tr> <tr> <td valign="top"><font size="2">Date Exercisable</font></td> <td valign="top"><font size="2">Expiration Date</font></td> <td align="center" valign="top"><font size=2> &nbsp; Title &nbsp; </font></td> <td align="top"><font size="2">Amont or Number of Shares</font></td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> </table> <P> <table border="0" cellspacing="0" cellpadding="4" width="1050"> <tr> <td colspan="4"> <font size="2">Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.</font> </td> </tr> <tr> <td colspan="4"> <font size="2">Explanation of Responses:</font><BR> <font size="2">&nbsp;</font> </td> </tr> <tr> <td colSpan="4">&nbsp;</td> </tr> <tr> <td valign="top" width="800"> <font size="2">&nbsp;</font> </td> <td width=200"> <font size="2">/s/ Mark Beaudouin<font size="2"> </td> <td width=100" valign="bottom" align="center"> <font size="2">04/01/03</font> </td> <td valign="top"> <font size="2">&nbsp;</font> </td> </tr> <tr> <td vAlign="top"> <font size="2">&nbsp;</font> </td> <td align="center"> <font size="2">**Signature of Reporting Person</font> </td> <td align="center"> <font size="2">Date</font> </td> <td valign="top"> <font size="2">&nbsp;</font> </td> </tr> <tr> <td colSpan="4">&nbsp;</td> </tr> </table> <table cellSpacing="0" cellPadding="4" border="0" width="1050"> <tr> <td valign="top"> <font size="2">*</font> </td> <td valign="top"> <font size="2">If the form is filed by more than one reporting person, see Instruction 5(b)(v).</font> </td> </tr> <tr> <td width="20" valign="top"> <font size="2">**</font> </td> <td valign="top"><font size="2">Intentional misstatements or omissions of facts constitute Federal Criminal Violations <br><i>See</i> 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).</font> </td> </tr> <tr> <td width="20" valign="top" align="right"> <font size="2">Note:</font> </td> <td valign="top"><font size="2">File three copies of this Form, on of which must be manually signed. If space is insufficient, <i>see</i> Instruction 6 for procedure</font> </td> </tr> </table> <p> <table cellSpacing="0" cellPadding="4" border="0" width="1050"> <tr> <td><font size="2"><b><i><u>Additional Comments:</b></i></u></font></td> </tr> <tr> <td> <font size="2"></font> </td> </tr> </table>

</TEXT>
</DOCUMENT>
</SUBMISSION>
