UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO.1)* Olin Corporation -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 680665-20-5 -------------------------------------------------------- (CUSIP Number) July 31, 2003 -------------------------------------------------------------------------------- (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) *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). Page 1 of 10 Pages SCHEDULE 13G CUSIP NO. 680665-20-5 Page 2 of 10 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Court Square Capital Limited ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (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 (8) SHARED DISPOSITIVE POWER 0 WITH: ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO ------------------------------------------------------------------------------- SCHEDULE 13G CUSIP NO. 680665-20-5 Page 3 of 10 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Citicorp Banking Corporation ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (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 (8) SHARED DISPOSITIVE POWER 0 WITH: ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) HC ------------------------------------------------------------------------------- SCHEDULE 13G CUSIP NO. 680665-20-5 Page 4 of 10 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Citicorp ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (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 (8) SHARED DISPOSITIVE POWER 0 WITH: ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) HC ------------------------------------------------------------------------------- SCHEDULE 13G CUSIP NO. 680665-20-5 Page 5 of 10 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Citigroup Holdings Company ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (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 (8) SHARED DISPOSITIVE POWER 0 WITH: ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) HC ------------------------------------------------------------------------------- SCHEDULE 13G CUSIP NO. 680665-20-5 Page 6 of 10 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Citigroup Inc. ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (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 20,538* OWNED BY ---------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------- PERSON (8) SHARED DISPOSITIVE POWER 20,538* WITH: ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 20,538* ------------------------------------------------------------------------------- (10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%* ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) HC ------------------------------------------------------------------------------- * Represents shares held by other subsidiaries of Citigroup Inc. Item 1(a). Name of Issuer: Olin Corporation Item 1(b). Address of Issuer's Principal Executive Offices: 501 Merritt 7 Norwalk, Connecticut 06856 Item 2(a). Name of Person Filing: Court Square Capital Limited ("CSCL") Citicorp Banking Corporation ("CBC") Citicorp Citigroup Holdings Company ("Citigroup Holdings") Citigroup Inc. ("Citigroup") Item 2(b). Address or Principal Office or, if none, Residence: The address of the principal office of each of CSCL, Citicorp and Citigroup is: 399 Park Avenue New York, NY 10043 The address of the principal office of CBC is: One Penn's Way New Castle, DE 19899 The address of the principal office of Citigroup Holdings is: One Rodney Square Wilmington, DE 19801 Item 2(c). Citizenship or Place of Organization: CSCL, CBC, Citicorp, Citigroup Holdings and Citigroup are Delaware corporations. Item 2(d). Title of Class of Securities: Common Stock Item 2(e). Cusip Number: 680665-20-5 Page 7 of 10 Pages Item 3. If this Statement is Filed Pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), Check Whether the Person Filing is a(n): (a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o); (b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c); (c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c); (d) [ ] Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8); (e) [ ] Investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E); (f) [ ] Employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F); (g) [ ] Parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G); (h) [ ] Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) [ ] Church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3) (j) [ ] Group, in accordance with Section 240.13d-1(b)(1)(ii)(J). Item 4. Ownership. (as of July 31, 2003) (a) Amount beneficially owned: See item 9 of cover pages (b) Percent of Class: See item 11 of cover pages (c) Number of shares as to which the person has: (i) sole power to vote or to direct the vote: (ii) shared power to vote or to direct the vote: (iii) sole power to dispose or to direct the disposition of: (iv) shared power to dispose or to direct the disposition of: See Items 5-8 of cover pages Page 8 of 10 Pages Item 5. Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X]. 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. CBC is the sole stockholder of CSCL. Citicorp is the sole stockholder of CBC. Citigroup Holdings is the sole stockholder of Citicorp. Citigroup is the sole stockholder of Citigroup Holdings. Item 8. Identification and Classification of Members of the Group. Not Applicable. Item 9. Notice of Dissolution of Group. Not Applicable. Page 9 of 10 Pages Item 10. Certification. Not Applicable. 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: August 8, 2003 COURT SQUARE CAPITAL LIMITED By: /s/ Anthony P. Mirra ---------------------------------------------- Name: Anthony P. Mirra Title: Vice President and Assistant Secretary CITICORP BANKING CORPORATION By: /s/ William H. Wolf -------------------------------------------- Name: William H. Wolf Title: Senior Vice President CITICORP By: /s/ Serena D. Moe -------------------------------------------- Name: Serena D. Moe Title: Assistant Secretary CITIGROUP HOLDINGS COMPANY By: /s/ Serena D. Moe -------------------------------------------- Name: Serena D. Moe Title: Assistant Secretary CITIGROUP INC. By: /s/ Serena D. Moe -------------------------------------------- Name: Serena D. Moe Title: Assistant Secretary Page 10 of 10 Pages EXHIBIT INDEX TO SCHEDULE 13G ----------------------------- EXHIBIT 1 --------- Agreement among CSCL, CBC, Citicorp, Citigroup Holdings Company and Citigroup as to joint filing of Schedule 13G