NATCO GROUP INC. 2950 N. LOOP WEST, 7TH FLOOR HOUSTON, TEXAS 77092 ________________ PROXY STATEMENT SUPPLEMENT ________________ This Proxy Statement Supplement is furnished by the Board of Directors of NATCO Group Inc. (the "Company" or "NATCO"). It amends and supplements the Proxy Statement of NATCO dated April 24, 2004, which was first mailed to stockholders on or about April 29, 2004. Capitalized terms used and not otherwise defined in this supplement shall have the respective meanings assigned to such terms in the Proxy Statement. After the April 24, 2004 Proxy Statement was printed, we became aware of the following inadvertent errors in the Summary Compensation Table appearing on page 17 of the Proxy Statement. The revised information is set forth below. A bonus payment totaling $135,179 made to Patrick M. McCarthy in 2002 was inadvertently omitted from the Summary Compensation Table. In the column of the Table captioned "Bonus (1)," the revised amount for Mr. McCarthy for 2002 is $135,179. The annual salary paid to Robert A. Curcio in 2002 was inadvertently understated by $2,070 in the Summary Compensation Table. In the column of the Table captioned "Salary," the revised amount for Mr. Curcio for 2002 is $199,500. Amounts listed under "Other" for each of Mr. McCarthy, Mr. Smith, Mr. Curcio and Mr. Michaluk have been omitted since they are below the threshold for reporting such amounts, and footnote 7 has been revised to reflect this change. In addition, certain amounts with regard to 401(k) contributions in the table and in footnotes 3 and 4 reflected the total contribution to the Named Executive Officer's account by the executive, not the company match, as was required. This resulted in the overstatement of "All Other Compensation" in 2003 of $6,000 for each of Nathaniel A. Gregory, Mr. McCarthy, C. Frank Smith and Mr. Curcio. In addition, "All Other Compensation" for Mr. Curcio for 2002 was previously overstated by $3,000. In the column of the Table captioned "All Other Compensation", the revised amount for Mr. Gregory for 2003 is $9,806, the revised amount for Mr. McCarthy for 2003 is $9,161, the revised amount for Mr. Smith for 2003 is $8,469 and the revised amount for Mr. Curcio for each of 2003 and 2002 is $8,270. A revised Summary Compensation Table, with footnotes, is set forth below. ANNUAL COMPENSATION LONG-TERM COMPENSATION AWARDS ------------------- ----------------------------- SECURITIES NAME AND FISCAL OTHER UNDERLYING ALL OTHER PRINCIPAL POSITION YEAR SALARY BONUS(1) ($) OPTIONS (#) COMPENSATION ------------------ ------ -------- -------- --------- ----------- ------------ Nathaniel A. Gregory ................... 2003 $426,308 $316,104 $78,798(2) $ -- $ 9,806(3) Chairman and Chief Executive 2002 400,000 216,523 78,875(2) -- 8,966(4) Officer 2001 394,231 191,842 71,299(2) 81,750 11,778(5) Patrick M. McCarthy .................... 2003 293,087 166,133 --(7) -- 9,161(3) Director and President 2002 275,000 135,179 --(7) -- 10,511(4) 2001 277,177 137,030 --(7) 56,300 9,432(5) C. Frank Smith ......................... 2003 228,039 107,299 --(7) 10,000 8,469(3) Executive Vice President 2002 220,000 84,229 --(7) -- 6,207(4) 2001 200,000 83,532 --(7) 48,300 11,220(5) Robert A. Curcio ....................... 2003 206,790 68,291 --(7) -- 8,270(3) Senior Vice President-- 2002 199,500 54,875 --(7) -- 8,270(4) Technology and Product 2001 189,999 56,689 --(7) 28,350 9,243(5) Development Peter G. Michaluk (6) .................. 2003 175,109 69,941 --(7) -- 22,681(8) Senior Vice President--Europe, 2002 156,260 70,655 --(7) -- 17,548(8) Africa and Middle East 2001 112,239 41,531 --(7) 86,350 10,983(8) ANNUAL COMPENSATION LONG-TERM COMPENSATION AWARDS ------------------- ----------------------------- SECURITIES NAME AND FISCAL OTHER UNDERLYING ALL OTHER PRINCIPAL POSITION YEAR SALARY BONUS(1) ($) OPTIONS (#) COMPENSATION ------------------ ------ -------- -------- --------- ----------- ------------ Richard W. FitzGerald .................. 2003 121,154 -- -- 66,667 1,888(3) Senior Vice President and Chief Financial Officer (9) ---------- (1) Bonuses reported and paid in a fiscal year relate to the executive's performance in the prior fiscal year and, in 2003, also included payment of previously deferred bonus awards. (2) Includes costs paid for lodging in Houston and the tax gross-up of related costs of $50,076 and $28,722 for 2003, respectively, $41,347 and $37,529 for 2002, respectively, and $37,040 and $34,259 for 2001, respectively. (3) Represents (a) matching contributions made in 2003 under our 401(k) Savings Plan of $8,000 for Mr. Gregory, $8,000 for Mr. McCarthy, $8,000 for Mr. Smith, $8,000 for Mr. Curcio and $1,696 for Mr. FitzGerald and (b) life insurance premiums of $1,806, $1,161, $469, $270 and $192 for Messrs. Gregory, McCarthy, Smith, Curcio and FitzGerald, respectively. (4) Represents (a) matching contributions made in 2002 under our 401(k) Savings Plan of $8,000 for Mr. Gregory, $9,350 for Mr. McCarthy, $5,738 for Mr. Smith and $8,000 for Mr. Curcio and (b) life insurance premiums of $966, $1,161, $469 and $270 for Messrs. Gregory, McCarthy, Smith, and Curcio, respectively. (5) Represents (a) matching contributions made in 2001 under our 401(k) Savings Plan of $10,950 for Mr. Gregory, $8,400 for Mr. McCarthy, $10,950 for Mr. Smith and $9,075 for Mr. Curcio and (b) life insurance premiums of $828, $1,032, $270 and $168 for Messrs. Gregory, McCarthy, Smith and Curcio, respectively. (6) Mr. Michaluk, Senior Vice President-Europe, Africa and Middle East, began employment with us in March 2001, when the company acquired Axsia Holdings Limited. (7) The aggregate amount of perquisites and other personal benefits for the Named Executive Officer is less than $50,000 or 10% of the annual salary and bonus of the named executive. (8) Represents (a) employer contributions to the U.K. Occupational Pension Scheme on behalf of the employee of $22,681, $17,548 and $10,983, and (b) amounts related to private health insurance in the U.K. for this employee of $2,133, $1,853 and $1,334, for the years ended December 31, 2003, 2002 and 2001, respectively. (9) Mr. FitzGerald, Senior Vice President and Chief Financial Officer, began employment with the company on May 28, 2003. In addition, footnote 1 to the table on security ownership of management and principal stockholders, located on pages 13 and 14 of the Proxy Statement, inadvertently overstated by 625 shares the number of shares which Mr. McCarthy had the right to acquire within 60 days. The revised number of shares in the footnote is 104,817. The Company's Proxy Statement dated April 24, 2004 is modified in its entirety by the foregoing. A NEW PROXY CARD IS INCLUDED WITH THIS SUPPLEMENT. IF YOU HAVE ALREADY VOTED, AND DO NOT WISH TO CHANGE YOUR VOTE, YOU DO NOT NEED TO SEND A NEW PROXY. IF YOU WISH TO CHANGE YOUR VOTE, OR HAVE NOT YET VOTED, PLEASE COMPLETE, DATE, SIGN AND MAIL PROMPTLY THE ENCLOSED PROXY IN THE ENCLOSED POSTPAID ENVELOPE. THE PROXY IS REVOCABLE AND WILL NOT BE USED IF YOU ARE PRESENT AT THE ANNUAL MEETING AND PREFER TO VOTE YOUR SHARES IN PERSON. By Order of the Board of Directors /s/ Katherine P. Ellis ---------------------- Katherine P. Ellis Senior Vice President, Secretary & General Counsel Dated: May 20, 2004 2