Second Amendment to Equity Line of Credit and Securities Purchase Agreement between Corixa Corporation and Castle Gate L.L.C.

Summary

This letter agreement, dated December 29, 2000, amends the existing Equity Line of Credit and Securities Purchase Agreement between Corixa Corporation and Castle Gate L.L.C., as previously amended. The amendment revises specific terms in the original agreement and its first amendment, including changes to a section and a date range for trading days. Both parties confirm their acceptance by signing the letter. The agreement ensures updated terms for the ongoing financial arrangement between the two companies.

EX-4.3 4 v68306ex4-3.txt EXHIBIT 4.3 1 EXHIBIT 4.3 [CORIXA LETTERHEAD] *Certain confidential information contained in this document, marked by brackets, has been omitted and filed with Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. December 29, 2000 Castle Gate L.L.C. 2365 Carillon Point Kirkland, WA 98033 Attention: Michael Larson RE: EQUITY LINE OF CREDIT AND SECURITIES PURCHASE AGREEMENT ENTERED INTO AS OF APRIL 8, 1999, BY AND AMONG CORIXA CORPORATION (THE "COMPANY") AND CASTLE GATE L.L.C. (THE "CASTLE GATE") (THE "PURCHASE AGREEMENT"), AS AMENDED BY THE LETTER AGREEMENT DATED DECEMBER 21, 2000 (THE "FIRST AMENDMENT") Dear Mr. Larson: This letter shall confirm our agreement that the Purchase Agreement, as amended by the First Amendment, is hereby further amended as follows (capitalized terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement): 1. Section 5q. (page 16) of the Purchase Agreement is deleted in its entirety and replaced with the following provision: [*] 2. Paragraph 1 of the First Amendment is amended by deleting the phrase on the fifth line [*] and replacing it with the phrase "the three trading days, December 26, 2000 through December 28, 2000". - ----------------------------------- * Confidential treatment requested. 2 If Castle Gate agrees with the foregoing, please so indicate by signing the enclosed duplicate original of this letter and returning it to my attention at your earliest convenience. Best regards, /s/ Steven Gillis - ---------------------------------------- Steven Gillis Chairman and Chief Executive Officer AGREED: Castle Gate L.L.C. By: /s/ Michael Larson ------------------------------------ William H. Gates III* *By Michael Larson, Attorney in Fact