================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G (RULE 13d-102) 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. 13) POGO PRODUCING COMPANY -------------------------------------------------------------------------------- (NAME OF ISSUER) COMMON STOCK, $1.00 PAR VALUE 730448107 ------------------------------- --------------------------- (TITLE OF CLASS OF SECURITIES) (CUSIP NUMBER) Check the appropraite box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) *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. (Continued on following page(s)) (Page 1 of 6 Pages) ================================================================================ 56706.0001 ------------------------------------ -------------------------------------------- -------------------------------------- CUSIP No. 730448107 13G Page 2 of 6 ------------------------------------ -------------------------------------------- -------------------------------------- ----------------------------- --------------------------------------------------- ------------------------------------------------- 1 NAME OF REPORTING PERSON: KLINGENSTEIN, FIELDS & CO., L.L.C. S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: 13-3479093 ----------------------------- ----------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (A) [_] (B) [_] ----------------------------- ----------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ----------------------------- --------------------------------------------------- ------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION: DELAWARE ------------------------------------ ------ ------------------------------------------------ -------------------------------------- NUMBER OF 5 SOLE VOTING POWER: 0 SHARES ------ ------------------------------------------------ -------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER: 0 OWNED BY ------ ------------------------------------------------ -------------------------------------- EACH 7 SOLE DISPOSITIVE POWER: 0 REPORTING ------ ------------------------------------------------ -------------------------------------- PERSON WITH 8 SHARED DISPOSITIVE POWER: 3,075,965 ----------------------------- -------------------------------------------------------------- -------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON: 3,075,965 ----------------------------- ----------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES: [_] ----------------------------- ----------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9): 7.6% ----------------------------- --------------------------------------------------- ------------------------------------------------- 12 TYPE OF REPORTING PERSON: IA ----------------------------- --------------------------------------------------- ------------------------------------------------- Item 1 (a) Name of Issuer Pogo Producing Company (b) Address of Issuer's Principal Executive Offices Five Greenway Plaza Suite 2700 Houston, Texas 77046-0504 Item 2 (a) Name of Person Filing See Item 1 of the Cover Page attached hereto (b) Address of Principal Business Office or, if none, Residence 787 Seventh Avenue New York, New York 10019 (c) Citizenship See Item 4 of the Cover Page attached hereto (d) Title of Class of Securities Common Stock, par value $1.00 per share (e) CUSIP Number 730448107 Item 3 Person Filing (e) Klingenstein, Fields & Co., L.L.C. is an Investment Adviser registered under section 203 of the Investment Advisers Act of 1940 Item 4 Ownership (a) Amount Beneficially Owned See Item 9 of the Cover Page attached hereto (b) Percent of Class See Item 11 of the Cover Page attached hereto 3 (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote See Item 5 of the Cover Page attached hereto (ii) shared power to vote or to direct the vote See Item 6 of the Cover Page attached hereto (iii) sole power to dispose or to direct the disposition of See Item 7 of the Cover Page attached hereto (iv) shared power to dispose or to direct the disposition of See Item 8 of the Cover Page attached hereto Item 5 Ownership of Five Percent or Less of a Class Not applicable Item 6 Ownership of More than Five Percent on Behalf of Another Person Not applicable Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company Not applicable Item 8 Identification and Classification of Members of the Group Not applicable Item 9 Notice of Dissolution of Group Not applicable 4 Item 10 Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. 5 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. February 12, 2001 Klingenstein, Fields & Co., L.L.C. By: /s/ Jonathan Roberts ------------------------------------ Jonathan Roberts, Member 6