UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported)

May 27, 2005

STRUCTURED ASSET SECURITIES CORPORATION (as Depositor under the Trust Agreement dated as of May 1, 2005, providing for the issuance of Structured Asset Investment Loan Trust Mortgage Pass-Through Certificates, Series 2005-5)

Structured Asset Securities Corporation

(Exact Name of Registrant as Specified in its Charter)

Delaware

333-120575

74-2440850

(State or Other Jurisdiction

Of Incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

745 Seventh Avenue, 7th Floor

New York, NY

(Address of Principal Executive Offices)

10019

(Zip Code)

Registrant’s telephone number, including area code: (212) 526-7000

No Change

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events

The Registrant registered issuances of its Structured Asset Investment Loan Trust Mortgage Pass-Through Certificates, Series 2005-5 on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the “Act”), by a Registration Statement on Form S-3 (Registration File No. 333-120575) (the “Registration Statement”). Pursuant to the Registration Statement, the Registrant issued $2,485,384,000 aggregate principal amount of Class A1, Class A2, Class A3, Class A4, Class A5, Class A6, Class A7, Class A8, Class A9, Class M1, Class M2, Class M3, Class M4, Class M5, Class M6, Class M7, Class M8, Class M9 and Class B Certificates of its Structured Asset Investment Loan Trust Mortgage Pass-Through Certificates, Series 2005-5 on May 27, 2005. This Current Report on Form 8-K is being filed to satisfy an undertaking, contained in the definitive Prospectus dated January 25, 2005, as supplemented by the Prospectus Supplement dated May 26, 2005 (the “Prospectus Supplement”), to file a copy of the Trust Agreement (as defined below) and other operative agreements executed in connection with the issuance of the Certificates, a form of which was filed as an exhibit to the Registration Statement.

The Certificates were issued pursuant to a Trust Agreement (the “Trust Agreement”), attached hereto as Exhibit 4.1, dated as of May 1, 2005, among Structured Asset Securities Corporation, as depositor, Aurora Loan Services LLC, as Master Servicer, The Murrayhill Company, as Credit Risk Manager, Wells Fargo Bank, N.A., as Securities Administrator and U.S. Bank National Association, as Trustee. The “Certificates” consist of the following classes: Class A1, Class A2, Class A3, Class A4, Class A5, Class A6, Class A7, Class A8, Class A9, Class M1, Class M2, Class M3, Class M4, Class M5, Class M6, Class M7, Class M8, Class M9, Class B, Class X, Class P and Class R. The Certificates evidence all of the beneficial ownership interest in a trust fund (the “Trust Fund”) that consists primarily of four pools of certain conventional, first and second lien, adjustable and fixed rate, fully amortizing and balloon, residential mortgage loans (the “Mortgage Loans”) with an aggregate outstanding principal balance of approximately $2,497,873,627 as of May 1, 2005. Capitalized terms used herein and not otherwise defined shall have the meanings assigned to them in the Trust Agreement.

Item 9.01. Financial Statements and Exhibits

(a)

Not applicable.

(b)

Not applicable.

(c)

Exhibits:

4.1

Trust Agreement dated as of May 1, 2005, among Structured Asset Securities Corporation, as Depositor, Aurora Loan Services LLC, as Master Servicer, The Murrayhill Company, as Credit Risk Manager, Wells Fargo Bank, N.A., as Securities Administrator and U.S. Bank National Association, as Trustee.

99.1

Mortgage Loan Sale and Assignment Agreement dated as of May 1, 2005, between Lehman Brothers Holdings Inc., as Seller, and Structured Asset Securities Corporation, as Purchaser.

99.2

Servicing Agreement dated as of May 1, 2005, among Lehman Brothers Holdings Inc., as Seller, and Aurora Loan Services LLC, as Master Servicer and Servicer.

99.3

Subservicing Agreement dated as of May 1, 2005, among Lehman Brothers Holdings Inc., as Seller, Aurora Loan Services LLC, as Master Servicer, and Option One Mortgage Corporation, as Servicer.

99.4

Servicing Agreement dated as of May 1, 2005, among Lehman Brothers Holdings Inc., as Seller, as Seller, Aurora Loan Services LLC, as Master Servicer, and Option One Mortgage Corporation, as Servicer.

99.5

The Mortgage Guaranty Insurance Corporation (“MGIC”) Mortgage
Guaranty Master Policy (No. 12-670-4-4234), including (i) Terms and
Conditions No. 71-72082 (2/05) and No. 71-70283 (2/05), as modified by the Terms Letter for MGIC Mortgage Insurance Coverage dated May 24, 2005 among Lehman Brothers Inc., MGIC and the Trustee and (iii) Commitment Certificates covering $ 466,469,061.35 aggregate principal balance of insurable Mortgage Loans.

99.6

Primary Mortgage Insurance Co. (“PMI”) Master Policy Bulk No. 2005-0347, subject to the terms and conditions of PMI Mortgage’s Bulk Primary First Lien Master Policy UW 2510.00 (9/00), including (i) Terms Letter for PMI Mortgage Insurance Coverage dated as of May 27, 2005, among Lehman Brothers Inc., PMI Mortgage and the Trustee and (ii) certificates covering $204,512,785.21 aggregate principal balance of insurable Mortgage Loans.

99.7

Republic Mortgage Insurance Company (“RMIC”) Mortgage Policy Form MP-1103, 8/94, including (i) any related endorsements and (ii) the RMIC Letter Agreement dated as of May 27, 2005, between RMIC and the Aurora Loan Services LLC and acknowledged by U.S. Bank National Association, as Trustee on behalf of the Trust Fund covering $84,971,647.22 aggregate principal balance of insurable Mortgage Loans.

99.8

CIFG Assurance North America, Inc. (“CIFG”) Financial Guaranty Insurance Policy No. CIFG NA-383 for $95,826,000 Class A8 Certificates and CIFG Financial Guaranty Insurance Policy No. CIFG NA-387 for $48,708,000 Class A9 Certificates.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STRUCTURED ASSET SECURITIES

CORPORATION

By:

/s/ Ellen V. Kiernan

Name: Ellen V. Kiernan

Title: Senior Vice President

Dated: May 27, 2005

EXHIBIT INDEX

Exhibit No.

Description

4.1

Structured Asset Investment Loan Trust 2005-5 8-K