Company: XOMAP
Filing Date: 2025-08-04
Form Type: SC TO-C
Source: 0001193125-25-172163
Chunk: 1

Company: XOMA Royalty Corp
Filing Date: 2025-08-04
Form: SC TO-C
Chunk 1
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”), to purchase all of the issued and outstanding shares of common stock, par value $0.0001 per share (“”), of HilleVax, Inc., a Delaware corporation
(“”), to be commenced pursuant to the Agreement and Plan of Merger, dated as of August 4, 2025, among Parent, Merger Sub and HilleVax (the “”).

The press release filed herewith as Exhibit 99.1 is neither an offer to purchase nor a solicitation of an offer to sell securities. The Offer
for the Shares described in this filing has not commenced. At the time the Offer is commenced, the Buyer Entities will file a tender offer statement on Schedule TO with the Securities and Exchange Commission (“”), and HilleVax
will file a solicitation/recommendation statement on Schedule 14D-9, with respect to the Offer.

Cautionary Note Regarding Forward-Looking Statements

This communication contains forward-looking statements related to the Buyer Entities and
HilleVax and the acquisition by the Buyer Entities of HilleVax, including express or implied forward-looking statements about the future operations and performance of HilleVax and Parent. These forward-looking statements are within the meaning of
U.S. federal securities laws, including, without limitation, statements regarding the anticipated timing of and closing of the proposed Offer, the merger and related transactions contemplated by the Merger Agreement (collectively referred to as the
“transactions”). The words “anticipate,” “approximately,” “look to,” “plan,” “expect,” “may,” “will,” “could” or “should,” the negative of these
terms or similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. These statements are based on current plans, estimates and projections. By their very
nature, forward-looking statements involve inherent risks and uncertainties, both general and specific. The Buyer Entities caution that a number of important factors, including those described in this communication, could cause actual results to
differ materially from those contemplated in any forward-looking statements. Any forward-looking statements in this communication are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties and
important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this communication, including, without limitation, the impact of actions of other parties
with respect to the transactions; the possibility that competing offers will be made; the