8-K 1 a2144950z8-k.txt FORM 8-K 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: October 15, 2004 (Date of earliest event reported) Credit Suisse First Boston Mortgage Securities Corp. -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 333-116258-02 13-3320910 -------------------------------------------------------------------------------- (State or other jurisdiction (Commission File No.) (IRS Employer of incorporation) Identification No.) 11 Madison Avenue New York, New York 10010 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, including area code (212) 325-2000 ------------------------------ -------------------------------------------------------------------------------- (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. Attached as Exhibit 99.1 to this Current Report is a collateral and structural term sheet (the "Collateral/Structural Term Sheet") furnished to the Registrant by Credit Suisse First Boston LLC (the "Underwriter") in respect of the Registrant's Commercial Mortgage Pass-Through Certificates, Series 2004-C4 (the "Certificates"). The Certificates are being offered pursuant to a Prospectus and related Prospectus Supplement (together, the "Prospectus"), which will be filed with the Commission pursuant to Rule 424(b)(5) under the Securities Act of 1933, as amended (the "Act"). The Certificates have been registered pursuant to the Act under a Registration Statement on Form S-3 (No. 333-116258) (the "Registration Statement"). The Registrant hereby incorporates the Collateral/Structural Term Sheet by reference in the Registration Statement. The Collateral/Structural Term Sheet was prepared solely by the Underwriter, and the Registrant did not prepare or participate in the preparation of the Collateral/Structural Term Sheet. Any statement or information contained in the Collateral/Structural Term Sheet shall be deemed to be modified or superseded for purposes of the Prospectus and the Registration Statement by statements or information contained in the Prospectus. ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP. Date: October 19, 2004 By: /s/ Jeffrey Altabef Name: Jeffrey Altabef Title: Vice President INDEX TO EXHIBITS

CSFB COMMERCIAL MORT PASS THR CERTS SER 2004 C4 8-K