Company: XOMAP
Filing Date: 2025-08-11
Form Type: SC TO-T/A
Source: 0001193125-25-177546
Chunk: 1

Company: XOMA Royalty Corp
Filing Date: 2025-08-11
Form: SC TO-T/A
Chunk 1
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 Royalty Corporation, a Nevada corporation (“”). This Amendment relates to the offer (the “”) to purchase all of the outstanding shares of common stock, par
value $0.001 per share (“”), of Turnstone Biologics Corp., a Delaware corporation (“”), for a price per Share of (i) $0.34 (the “”), payable subject to any applicable tax
withholding and without interest, and (ii) one non-transferable contractual contingent value right (“”) for each Share, which shall represent the right to receive potential payments,
in cash, described in, and subject to and in accordance with the terms and conditions of, the CVR Agreement (as described below), subject to any applicable tax withholding and without interest (such amount, the “,” and
together with the Cash Amount, the “”), all upon the terms and subject to the conditions described in the Amended and Restated Offer to Purchase, dated July 23, 2025 (together with any amendments or supplements
thereto, the “”) and in the related Letter of Transmittal, copies of which are attached to the Schedule TO as exhibits (a)(1)(E) and (a)(1)(B), respectively. The Offer is being made pursuant to the Agreement and
Plan of Merger, dated as of June 26, 2025 (together with any amendments or supplements thereto, the “”), among Turnstone, Purchaser and XRA 3 Corp., a Delaware corporation and a wholly owned subsidiary of
Purchaser (“”), a copy of which is filed as Exhibit (d)(1) to the Schedule TO and incorporated herein by reference with respect to Items 4 through 11 of this Amendment.

Except as otherwise set forth in this Amendment, all terms of the Offer and all other disclosures set forth in the Schedule TO and the
Exhibits thereto remain unchanged and are hereby expressly incorporated into this Amendment by reference. This Amendment should be read together with the Schedule TO. Capitalized terms used and not otherwise defined in this Amendment shall have the
meanings assigned to such terms in the Schedule TO and the Offer to Purchase.

ITEMS 1 THROUGH 9 AND 11

Items 1 through 9 and 11 of the Schedule TO, to the extent such Items incorporate by reference the information contained in the Offer to
Purchase, are hereby amended and supplemented as follows:

“Closing of the Merger

The Offer expired as scheduled, one minute past 11:59 p