UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 Open Solutions Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.01 par value per share -------------------------------------------------------------------------------- (Title of Class of Securities) 68371P102 -------------------------------------------------------------------------------- (CUSIP Number) 11/26/03 -------------------------------------------------------------------------------- (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). CUSIP No. 68371P102 13G Page 2 of 5 pages -------------------------------------------------------------------------------- 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Aetna Inc. I.R.S. ID # 23-2229683 -------------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) N/A.............................................................. [ ] (b) N/A.............................................................. [ ] -------------------------------------------------------------------------------- 3. SEC Use Only........................................................... -------------------------------------------------------------------------------- 4. Citizenship or Place of Organization Pennsylvania, USA.............. -------------------------------------------------------------------------------- 5. Sole Voting Power 869,786......... ------------------------------------------------------ Number of Shares 6. Shared Voting Power........................ Beneficially Owned by Each ------------------------------------------------------ Reporting Person With: 7. Sole Dispositive Power 869,786........ ------------------------------------------------------ 8. Shared Dispositive Power................... -------------------------------------------------------------------------------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person 869,786.. -------------------------------------------------------------------------------- 10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) N/A................................................ [ ] -------------------------------------------------------------------------------- 11. Percent of Class Represented by Amount in Row (9) 5.2%............. -------------------------------------------------------------------------------- 12. Type of Reporting Person (See Instructions) CO.................... -------------------------------------------------------------------------------- CUSIP No. 68371P102 13G Page 3 of 5 pages Item 1(a) Name of Issuer: Open Solutions Inc. Item 1(b) Address of Issuer's Principal Executive Offices: 300 Winding Brook Drive Glastonbury, CT 06033 Item 2(a) Name of Person Filing: Aetna Inc. Item 2(b) Address of Principal Business Office or, if none, Residence: 151 Farmington Avenue Hartford, Connecticut 06156 Item 2(c) Citizenship: Pennsylvania Item 2(d) Title of Class of Securities: Common Stock, par value $.01 per share Item 2(e) CUSIP Number: 68371P102 Item 3 Description of Person Filing: Pennsylvania corporation Item 4 Ownership: (a) Amount Beneficially Owned: 869,786 shares (b) Percent of Class: 5.2% (c) Number of Shares as to which the person has: (i) sole voting power; (ii) shared voting power; (iii) sole dispositive power; (iv) shared dispositive power: 869,786 CUSIP No. 68371P102 13G Page 4 of 5 pages Item 5 Ownership of Five Percent or Less of a Class: N/A 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 [ ]. Item 6 Ownership of More than Five Percent on Behalf of Another Person: N/A Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: Aetna Life Insurance Company, a Connecticut insurance company and a wholly-owned subsidiary of Aetna Inc, is the subsidiary which acquired the security being reported on by the parent holding company. The classification of Aetna Life Insurance Company is IC. Item 8 Identification and Classification of Members of the Group: N/A Item 9 Notice of Dissolution of Group: N/A CUSIP No. 68371P102 13G Page 5 of 5 pages Item 10 Certification: SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I hereby certify that the information set forth in this statement is true, complete and correct. DATED: February 13, 2004 Aetna Inc. By /s/ Timothy A. Holt ------------------------------ Name: Timothy A. Holt Title: Senior Vice President and Chief Investment Officer