Frazier Life Sciences X, L.P. - 17 Sep 2025 Form 4 Insider Report for HilleVax, Inc. (HLVX)

Role
10%+ Owner
Signature
/s/ Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P., GP of Frazier Life Sciences X, L.P.
Issuer symbol
HLVX
Transactions as of
17 Sep 2025
Net transactions value
-$16,677,445
Form type
4
Filing time
17 Sep 2025, 17:20:18 UTC
Previous filing
17 Sep 2024

Reporting Owners (5)

Name Relationship Address Signature Signature date CIK
Frazier Life Sciences X, L.P. 10%+ Owner FRAZIER LIFE SCIENCES MANAGEMENT, L.P., 1001 PAGE MILL RD, BUILDING 4, SUITE B, PALO ALTO /s/ Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P., GP of Frazier Life Sciences X, L.P. 17 Sep 2025 0001790879
FHMLS X, L.P. 10%+ Owner FRAZIER LIFE SCIENCES MANAGEMENT, L.P., 1001 PAGE MILL RD, BUILDING 4, SUITE B, PALO ALTO /s/ Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P. 17 Sep 2025 0001790880
FHMLS X, L.L.C. 10%+ Owner FRAZIER LIFE SCIENCES MANAGEMENT, L.P., 1001 PAGE MILL RD, BUILDING 4, SUITE B, PALO ALTO /s/ Steve R. Bailey, CFO of FHMLS X, L.L.C. 17 Sep 2025 0001790811
Topper James N 10%+ Owner FRAZIER LIFE SCIENCES MANAGEMENT, L.P., 1001 PAGE MILL RD, BUILDING 4, SUITE B, PALO ALTO /s/ Steve R. Bailey, Attorney-in-Fact For Patrick J. Heron 17 Sep 2025 0001341382
Heron Patrick J Director, 10%+ Owner FRAZIER LIFE SCIENCES MANAGEMENT, L.P., 1001 PAGE MILL RD, BUILDING 4, SUITE B, PALO ALTO /s/ Steve R. Bailey, Attorney-in-Fact For James N. Topper 17 Sep 2025 0001365617

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction HLVX Common Stock Disposition pursuant to a tender of shares in a change of control transaction $16,643,907 -8,535,337 -100% $1.95 0 17 Sep 2025 By Frazier Life Sciences X, L.P. F1, F2
transaction HLVX Common Stock Disposition pursuant to a tender of shares in a change of control transaction $33,538 -17,199 -100% $1.95 0 17 Sep 2025 By Patrick J. Heron F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Frazier Life Sciences X, L.P. is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 Reflects disposition of the Issuer's equity securities upon the consummation of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated as of August 4, 2025, by and among Issuer, XOMA Royalty Corporation ("Parent") and XRA 4 Corp., a wholly owned subsidiary of Parent ("Merger Sub"), including the consummation of the merger (the "Merger") between Issuer and Merger Sub on September 17, 2025. Pursuant to the Merger Agreement, as of the effective time of the Merger (the "Effective Time"), each share of the Issuer's Common Stock, par value $0.0001 per share ("Shares"), issued and outstanding immediately prior to the Effective Time was converted automatically into the right to receive (i) $1.95 in cash, without interest plus (ii) one non-transferable contractual contingent value right per Share.
F2 The shares are held directly by Frazier Life Sciences X, L.P. FHMLS X,, L.P. is the general partner of Frazier Life Sciences X, L.P. and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. James N. Topper and Patrick J. Heron are the sole managing members of FHMLS X, L.L.C. and share voting and investment power over the shares held by Frazier Life Sciences X, L.P. Dr. Topper and Mr. Heron disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.
F3 Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, each outstanding restricted stock unit ("RSU") immediately vested in full and was canceled in exchange for the right receive (a) an amount in cash, without interest, equal to the product obtained by multiplying (x) the $1.95 by (y) the number of shares underlying such RSU at the Effective Time and (b) one CVR for each share underlying such RSU.