Frazier Life Sciences IX, L.P. - Nov 1, 2025 SCHEDULE 13D/A Report for MIRUM PHARMACEUTICALS, INC. Common Stock, par value $0.0001 per share (MIRM)

Filing Manager
Frazier Life Sciences IX, L.P.
Reporting Manager
James N. Topper
Security
MIRUM PHARMACEUTICALS, INC. Common Stock, par value $0.0001 per share
Symbol
MIRM
Shares outstanding
50.5M shares
Disclosed Ownership
3.74M shares
Ownership
7.4%
Form type
SCHEDULE 13D/A
Date filed
11/4/2025, 05:26 PM
Date of event
Nov 1, 2025
Previous filing
Aug 20, 2025
SEC
View on sec.gov

Reporting Managers (14)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Frazier Life Sciences IX, L.P. 7.1% 3.57M 0 3.57M /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS IX, L.L.C., GP of FHMLS IX, L.P., GP of Frazier Life Sciences IX, L.P. 0001720320
FHMLS IX, L.P. 7.1% 3.57M 0 3.57M /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS IX, L.L.C., GP of FHMLS IX, L.P. 0001782789
FHMLS IX, L.L.C. 7.1% 3.57M 0 3.57M /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS IX, L.L.C. 0001782791
Frazier Life Sciences X, L.P. 0.3% 168K 0 168K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P., GP of Frazier Life Sciences X, L.P. 0001790879
FHMLS X, L.P. 0.3% 168K 0 168K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P. 0001790880
FHMLS X, L.L.C. 0.3% 168K 0 168K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS X, L.L.C. 0001790811
Frazier Life Sciences Public Fund, L.P. 5% 2.51M 0 2.51M /s/ Steve R. Bailey Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P., GP of Frazier Life Sciences Public Fund, L.P. 0001863769
FHMLSP, L.P. 5% 2.51M 0 2.51M /s/ Steve R. Bailey Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P. 0001879466
FHMLSP, L.L.C. 5% 2.51M 0 2.51M /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLSP, L.L.C. 0001879465
Frazier Life Sciences XI, L.P. 1.1% 545K 0 545K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P., GP of Frazier Life Sciences XI, L.P. 0001911592
FHMLS XI, L.P. 1.1% 545K 0 545K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P. 0001911580
FHMLS XI, L.L.C. 1.1% 545K 0 545K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLS XI, L.L.C. 0001911623
James N. Topper 7.4% 3.74M 0 3.74M /s/ Steve R. Bailey By Steve R. Bailey, Attorney-in-Fact for James N. Topper, pursuant to a Power of Attorney, a copy of which was filed with the SEC on July 31, 2017 0001341382
Patrick J. Heron 7.6% 3.74M 82.5K 3.74M /s/ Steve R. Bailey By Steve R. Bailey, Attorney-in-Fact for Patrick J. Heron, pursuant to a Power of Attorney, a copy of which was filed with the SEC on July 31, 2017 0001365617