SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment 1) (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 1997 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 000-20809 SIS BANCORP, INC. (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-3303264 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) 1441 Main Street Springfield, Massachusetts 01102 (Address of Principal Executive Offices) (Zip Code) (413) 748-8000 (Registrant's Telephone Number, Including Area Code) SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: None SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: Title of Each Class Common Stock, par value $0.01 per share Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes X No ____ Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [ X ] The aggregate market value of the voting stock held by non-affiliates of the registrant, based on the closing sale price of March 6, 1998, as reported by NASDAQ, was $267,882,500. Indicate the number of shares outstanding of the registrant's common stock, as of the latest practicable date: 6,957,987 shares as of March 6, 1998. DOCUMENTS INCORPORATED BY REFERENCE Portions of the SIS Bancorp, Inc. Proxy Statement for the Annual Meeting of Stockholders to be held on May 7, 1998 are incorporated by reference into Part III of this Form 10-K. Part IV ITEM 14. EXHIBITS, FINANCIAL SCHEDULES AND REPORTS ON FORM 8-K (a) Contents: (1) Financial Statements: All Financial Statements are included as Part II, Item 8 of this Report. The index is on page 40 of this Report. (2) Financial Statement Schedules: All Financial Statement Schedules are included as Part II, Item 8 of this Report. The index is on page 40 of this Report. (b) Reports on Form 8-K: During the fourth quarter of 1997, the following Form 8-K's were filed: o Form 8-K filed on October 22, 1997 relating to the press release issued on October 22, 1997 containing unaudited financial information and announcing a cash dividend for the quarter ended September 30, 1997 and containing information relating to the previously announced acquisition of GBT and the acceleration of systems conversions and full "back office" integration of GBT with the Company. o Form 8-K filed on December 31, 1997 announcing the completion on December 17, 1997 of the acquisition of GBT by the Company pursuant to the Agreement and Plan of Reorganization dated August 18, 1997. 1 (c) Exhibits: Exhibit No. Exhibit Location (3)(a). Articles of Organization of SIS Bancorp, Inc. (1) (3)(b). By-laws of SIS Bancorp, Inc. (1) 4(a). Specimen Common Stock Certificate (4) 10. Material Contracts (a) Employment agreements for Messrs. F. William Marshall, Jr., Frank W. Barrett, B. John Dill, John F. Treanor, Henry J. McWhinnie, Ms. Jeanne Rinaldo, Mr. Michael E. Tucker (1) (b) Employment agreements for Messrs. Gilbert F. Ehmke and Christopher A. Sinton. (2) (c) Employment agreement for Mr. J. Gilbert Soucie * (d) Director and Management Stock Option Plan, as amended. (4) (e) Director and Management Restricted Stock Plan, as amended. (4) (f) Rights Agreement, dated January 22, 1997 by and between the Company and ChaseMellon Shareholder Services, as Rights Agent (3) 21. Subsidiaries of the Registrant * 23. Consent of Price Waterhouse, LLP. * 27. Financial Data Schedules 27.1 Financial Data Schedule for year ended December 31, 1997 * 27.2 Financial Data Schedule restated for year ended December 31, 1996 * 27.3 Financial Data Schedules restated for periods ended June 30, 1996, September 30, 1996, March 31, 1997, June 30, 1997 and September 30, 1997 Locations of Exhibits if not attached hereto: (1) Exhibit is incorporated by reference to the Form 8-A Registration Statement filed by the Company with the Securities and Exchange Commission ("SEC") on June 21, 1996. (2) Exhibit is incorporated by reference to the Form 10-Q for the quarter ending June 30, 1996. (3) Exhibit is incorporated by reference to the Form 8-A Registration Sta tement filed by the Company with the SEC on January 23, 1997. (4) Exhibit is incorporated by reference to the Form 10-K filed for the year ended December 31, 1996. * Previously filed 2 SIGNATURES Pursuant to the requirements of the Section 13 of the Securities Exchange Act of 1934, the Bank has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized. SPRINGFIELD INSTITUTION FOR SAVINGS April 28, 1998 /s/ John F. Treanor Date John F. Treanor Executive Vice President, Chief Financial Officer, Chief Operating Officer and Treasurer 3