as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

Executive Chairman — William “Obi” Greenman: Mr. Greenman transitioned from CEO to Executive Chairman with a defined term and compensation details.

SIGNATURES 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. CERUS CORPORATION Date: June 8, 2026 By: /s/ Kevin D. Green Kevin D. Green Chief Financial Officer

Termination of a Material Definitive Agreement. The information in

Entry into a Material Definitive Agreement. On June 5, 2026, (the “Closing Date”), Cerus Corporation (the “Company”) entered into (i) a Second Amended and Restated Credit, Security and Guaranty Agreement (Term Loan) (the “Term Loan Credit Agreement”), by and among the Company, the lenders party thereto from time to time (the “Term Loan Lenders”) and MidCap Financial Trust, as agent and a lender, which amended and restated the Company’s existing Amended and Restated Credit, Security and Guaran…

The filing pertains to the approval of an amendment and restatement of the Company’s equity incentive plan, which is not a management change event.

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

The company adopted a new severance plan and entered into individual participation agreements with certain officers.

President and Chief Executive Officer — Vivek Jayaraman: Vivek Jayaraman was promoted to President and Chief Executive Officer, with William 'Obi' Greenman transitioning to Executive Chairman.

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

Director — Timothy L. Moore: Mr. Moore decided not to stand for re-election at the 2026 Annual Meeting.

as Exhibit 99.1 hereto. Such product revenue results as reported are preliminary, unaudited and subject to completion. The Company’s independent registered public accounting firm has not audited or performed any procedures with respect to these preliminary results and does not express an opinion or any other form of assurance with respect thereto. The Company’s financial closing procedures for the three months and year ended December 31, 2025 are not yet complete and, as a result, the final r…

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

Chair of the Board of Directors — Daniel N. Swisher, Jr.: Mr. Swisher retired from the Board and was succeeded by William M. Greenman as Chair of the Board.

The filing describes an equity incentive plan amendment and restatement, not a management change.

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

Director — Gail Schulze: Ms. Schulze decided not to stand for re-election at the 2025 Annual Meeting.

as Exhibit 99.1 hereto. Such product revenue results as reported are preliminary, unaudited and subject to completion. The Company’s independent registered public accounting firm has not audited or performed any procedures with respect to these preliminary results and does not express an opinion or any other form of assurance with respect thereto. The Company’s financial closing procedures for the three months and year ended December 31, 2024 are not yet complete and, as a result, the final r…

Entry into a Material Definitive Agreement. On December 9, 2024, Cerus Corporation (the “Company”) entered into the Second Amended and Restated Supply and Manufacturing Agreement (“2025 Agreement”) with Porex Corporation (“Porex”), effective January 1, 2025 to extend the current term of the Amended and Restated Supply and Manufacturing Agreement until December 31, 2027. Under the terms of the 2025 Agreement, unit pricing for platelet wafers and plasma disks are set at certain amounts for the…

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…

Director — Dean Gregory: Mr. Dean Gregory was appointed to the Board of Directors.

as Exhibit 99.1 hereto. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company…