Frazier Life Sciences IX, L.P. - Aug 18, 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
8/20/2025, 05:17 PM
Date of event
Aug 18, 2025
Next filing
Nov 4, 2025
SEC
View on sec.gov

Reporting Managers (20)

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. 3.1% 1.57M 0 1.57M /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. 3.1% 1.57M 0 1.57M /s/ Steve R. Bailey Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P. 0001879466
FHMLSP, L.L.C. 3.1% 1.57M 0 1.57M /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLSP, L.L.C. 0001879465
Frazier Life Sciences Public Overage Fund, L.P. 1.9% 941K 0 941K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C., GP of FHMLSP Overage, L.P., GP of Frazier Life Sciences Public Overage Fund, L.P. 0001913804
FHMLSP Overage, L.P. 1.9% 941K 0 941K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C., GP of FHMLSP Overage, L.P. 0001963247
FHMLSP Overage, L.L.C. 1.9% 941K 0 941K /s/ Steve R. Bailey By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C. 0001963248
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
Albert Cha 0% 0 0 0 /s/ Steve R. Bailey By Steve R. Bailey, Attorney-in-Fact for Albert Cha, pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021 0001397906
James Brush 0% 0 0 0 /s/ Steve R. Bailey By Steve R. Bailey, Attorney-in-Fact for James Brush, pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021 0001865123
Daniel Estes 0% 0 0 0 /s/ Steve R. Bailey By Steve R. Bailey, Attorney-in-Fact for Daniel Estes, pursuant to a Power of Attorney, a copy of which was filed with the SEC on April 18, 2022 0001702527