Summit Therapeutics Inc SEC Filings

Summit Therapeutics (SMMT) insider transaction: Chief Accounting Officer Bhaskar Anand reported acquiring 26,680 shares of common stock at $18.74 per share on 10/21/2025. The shares were acquired in a private placement under a definitive agreement dated October 21, 2025, with the transaction anticipated to close on or about October 23, 2025.

Following the reported transaction, Anand beneficially owned 159,751 shares directly. Holdings include shares previously acquired through the company’s employee stock purchase plan.

Summit Therapeutics Inc. (SMMT) reported an insider purchase by its COO and CFO, who is also a director. On 10/21/2025, the reporting person acquired 53,361 shares of common stock at $18.74 per share, coded as an acquisition (A).

Following this transaction, the reporting person beneficially owned 3,073,603 shares, held directly. The shares were acquired in a private placement under a definitive agreement dated October 21, 2025, with the transaction anticipated to close on or about October 23, 2025.

Summit Therapeutics (SMMT) Co‑CEO, director, and 10% owner Robert W. Duggan reported acquisitions of common stock. He acquired 13,980,789 shares at $18.74 in a private placement pursuant to a definitive agreement dated October 21, 2025, anticipated to close on or about October 23, 2025. He also acquired 266,808 shares indirectly at $18.74 and purchased 26,680 shares at $18.74.

Following these transactions, he beneficially owned 570,073,879 shares directly and 25,724,474 shares indirectly via a trust, with additional indirect holdings of 76,680, 31,000, and 10,199,776 shares through family and related trusts.

Summit Therapeutics (SMMT) Co‑Chief Executive Officer and director Mahkam Zanganeh, a 10% owner, reported multiple share purchases dated 10/21/2025 tied to a private placement at $18.74 per share. Reported acquisitions include 266,808 shares by the Mahkam Zanganeh Revocable Trust, 26,680 shares for an immediate family member, and 13,980,789 shares by her spouse. The filing notes the transaction was pursuant to a definitive agreement and is anticipated to close on or about October 23, 2025. The report includes a standard disclaimer of beneficial ownership for certain indirect holdings.

Summit Therapeutics Inc. announced a private placement of 26,682,846 shares of common stock at $18.74 per share, matching the October 21, 2025 closing price, for aggregate gross proceeds of approximately $500.0 million. The financing is a primary issuance and is expected to close on or before October 28, 2025, subject to customary closing conditions.

Company leaders and employees participated, purchasing an aggregate of 14,514,402 shares, and Akeso, Inc. purchased 533,617 shares. The shares are being issued in reliance on Section 4(a)(2) and Regulation D exemptions. Summit agreed to file a registration statement to register the resale of these shares as soon as reasonably practicable and no later than December 19, 2025, and to use reasonable best efforts to have it declared effective.

Summit Therapeutics Inc. filed a Form 4 disclosing an equity award to Anand Bhaskar, the company's Chief Accounting Officer. On 09/18/2025 Mr. Bhaskar was granted a stock option to purchase 50,000 shares of common stock at an exercise price of $19.23 per share.

The option vests in four equal annual installments with the first vesting on 09/18/2026 and expires on 09/18/2035. After the grant, Mr. Bhaskar beneficially owns 50,000 underlying shares directly. The Form 4 was signed on 09/19/2025.

Summit Therapeutics Inc. (SMMT) Form 4 filing shows insider transactions by Mahkam Zanganeh, who is identified as Co-Chief Executive Officer, a Director and a 10% owner. On 09/10/2025 the reporting person purchased 333,394 shares of common stock at a weighted average price of $17.68 per share. On 09/11/2025 an additional 5,000 shares were purchased at $18.07 per share. The filing also reports a disposition of 31,000 shares and lists significant indirect holdings through trusts and a spouse, while the reporting person disclaims beneficial ownership of certain reported securities except for any pecuniary interest.

Robert W. Duggan, Co-Chief Executive Officer and Director of Summit Therapeutics Inc. (SMMT), reported purchases of the company's common stock on September 10 and 11, 2025. On 09/10/2025 he purchased 333,394 shares at a weighted-average price of $17.68 per share, and on 09/11/2025 he purchased 5,000 shares at $18.07 per share. Following the reported transactions, the filing lists 556,093,090 shares as beneficially owned directly by the reporting person. The filing also discloses several indirect holdings associated with the reporting person, including 31,000 shares held by a spouse and multi-million share interests held through trusts with the spouse as trustee (10,199,776 and 25,457,666 shares).