Company: XOMAP
Filing Date: 2025-07-24
Form Type: SC TO-T/A
Source: 0001193125-25-163557
Chunk: 0

Company: XOMA Royalty Corp
Filing Date: 2025-07-24
Form: SC TO-T/A
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1) TURNSTONE BIOLOGICS CORP. (Name of Subject Company (Issuer)) XOMA ROYALTY CORPORATION (Name of Filing Persons (Offeror)) Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 98419J206 (CUSIP Number of Class of Securities) Owen Hughes XOMA Royalty Corporation 2200 Powell Street, Suite 310 Emeryville, California 94608 Tel. (510) 204-7200 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons) Copies to: Ryan A. Murr Branden C. Berns Melanie E. Neary Gibson, Dunn & Crutcher LLP One Embarcadero Center, Suite 2600 San Francisco, CA 94111

| ☐ | Check the box if the filing relates solely to preliminary communications made before the commencement of 
 a tender offer.                                                                                          |

Check the appropriate boxes below to designate any transactions to which the statement relates:

| ☒ | third-party tender offer subject to Rule 14d-1. |

| ☐ | issuer tender offer subject to Rule 13e-4. |

| ☐ | going-private transaction subject to Rule 13e-3. |

| ☐ | amendment to Schedule 13D under Rule 13d-2. |

Check the following box if the filing is a final amendment reporting the results of the tender offer. ☐ If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

| ☐ | Rule 13e-4(i) (Cross-Border Issuer Tender Offer) |

| ☐ | Rule 13d-1(d) (Cross-Border Third-Party Tender Offer) |

This Amendment No. 1 (this “ Amendment No. 1”) amends and supplements the Tender Offer Statement on Schedule TO, originally filed with the Securities and Exchange Commission (the “ SEC”) on July 11, 2025 (together with any subsequent amendments and supplements thereto, the “ Schedule TO”), by XOMA Royalty Corporation, a Nevada corporation (“ Purch