EXHIBIT A
AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13D need to be filed with respect to the ownership by each of the undersigned of shares of Common Stock of HilleVax, Inc.
| Date: May 31, 2024 | FRAZIER LIFE SCIENCES PUBLIC FUND, L.P. | |||||
| By: FHMLSP, L.P., its General Partner | ||||||
| By: FHMLSP, L.L.C., its General Partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLSP, L.P. | |||||
| By: | FHMLSP, L.L.C., its General Partner | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLSP, L.L.C. | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FRAZIER LIFE SCIENCES X, L.P. | |||||
| By: | FHMLS X, L.P., its General Partner | |||||
| By: FHMLS X, L.L.C., its General Partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLS X, L.P. | |||||
| By: | FHMLS X, L.L.C., its General Partner | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLS X, L.L.C. | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FRAZIER LIFE SCIENCES PUBLIC OVERAGE FUND, L.P. | |||||
| By: FHMLSP Overage, L.P., its General Partner | ||||||
| By: FHMLSP Overage, L.L.C., its General Partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLSP OVERAGE, L.P. | |||||
| By FHMLSP Overage, L.L.C., its General Partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLSP OVERAGE, L.L.C. | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FRAZIER LIFE SCIENCES XI, L.P. | |||||
| By FHMLS XI, L.P., its general partner | ||||||
| By FHMLS XI, L.L.C., its general partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLS XI, L.P. | |||||
| By FHMLS XI, L.L.C., its general partner | ||||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | FHMLS XI, L.L.C. | |||||
| By: | /s/ Steve R. Bailey | |||||
| Steve R. Bailey, Chief Financial Officer | ||||||
| Date: May 31, 2024 | By: | * | ||||
| James N. Topper | ||||||
| Date: May 31, 2024 | By: | * | ||||
| Patrick J. Heron | ||||||
| Date: May 31, 2024 | By: | ** | ||||
| Albert Cha | ||||||
| Date: May 31, 2024 | By: | ** | ||||
| James Brush | ||||||
| Date: May 31, 2024 | By: | *** | ||||
| Daniel Estes | ||||||
| Date: May 31, 2024 | By: | /s/ Steve R. Bailey | ||||
| Steve R. Bailey, as Attorney-in-Fact | ||||||
| * | This Agreement was executed by Steve R. Bailey on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on February 24, 2017. |
| ** | This Agreement was executed by Steve R. Bailey on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021. |
| *** | This Agreement was executed by Steve R. Bailey on behalf of the individual listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on April 18, 2022. |
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