Material Event (Form 8-K)

Item 8.01 Other Events.

On August 28, 2026, Coherus Oncology, Inc. (the "Company") entered into a sales agreement (the "Sales Agreement") with Leerink Partners LLC (the "Agent"), pursuant to which the Company may offer and sell, from time to time, through or to the Agent, acting as agent or principal, shares of the Company's common stock, par value $0.0001 per share, having an aggregate offering price of up to $50.0 million (the "Shares").

The Company is not obligated to sell any Shares under the Sales Agreement. Subject to the terms and conditions of the Sales Agreement, the Agent will use commercially reasonable efforts, consistent with their normal trading and sales practices and applicable state and federal laws, rules and regulations and the rules of the Nasdaq Global Market, to sell Shares from time to time based upon the Company's instructions, including any price, time or size limits or other customary parameters or conditions specified by the Company. Under the Sales Agreement, the Agent may sell Shares by any method permitted by law deemed to be an "at the market offering" under Rule 415(a)(4) under the Securities Act of 1933, as amended (the "Securities Act"). The Company will pay the Agent a commission up to 3.0% of the gross proceeds from each sale of Shares and provide the Agent with customary indemnification and contribution rights. The Sales Agreement may be terminated by the Agent or the Company at any time upon ten days' notice to the other party.

The Shares will be offered pursuant to a shelf registration statement on Form S-3 (File No. 333-291520), which was declared effective by the U.S. Securities and Exchange Commission (the "Commission") on December 8, 2025, and a prospectus supplement filed with the Commission on August 28, 2026 in connection with the offer and sale of the Shares pursuant to the Sales Agreement.

The Sales Agreement contains customary representations, warranties, covenants, indemnification obligations of the Company and the Agent, including for liabilities under the Securities Act, and other obligations of the parties. The representations, warranties and covenants contained in the Sales Agreement were made only for purposes of such agreement, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties. The foregoing description of the Sales Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Sales Agreement, a copy of which is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The legal opinion of Latham & Watkins LLP relating to the Shares that may be sold pursuant to the Sales Agreement is filed as Exhibit 5.1 to this Current Report on Form 8-K.

The Company intends to use any net cash proceeds it receives from the issuance and sale of any shares of the Company's common stock to or through the Agent for general corporate purposes, including working capital.

This Current Report on Form 8-K shall not constitute an offer to sell or the solicitation of an offer to buy any Shares under the Sales Agreement nor shall there be any offer, solicitation or sale of such Shares in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

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