Key facts
- Frazier Life Sciences IX, L.P. filed SCHEDULE 13D/A for MIRUM PHARMACEUTICALS, INC. Common Stock, par value $0.0001 per share (MIRM).
- Disclosed ownership: 7.4%.
- Date of event: 01 Nov 2025.
Frazier Life Sciences IX, L.P. - 01 Nov 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
- Symbol
- MIRM
- Shares outstanding
- 50,475,946 shares
- Disclosed Ownership
- 3,735,220 shares
- Ownership
- 7.4%
- Form type
- SCHEDULE 13D/A
- Filing time
- 04 Nov 2025, 17:26:07 UTC
- Date of event
- 01 Nov 2025
- Previous filing
- 20 Aug 2025
- Next filing
- 27 Jan 2026
- SEC
- View on sec.gov
Key filing fact
Frazier Life Sciences IX, L.P. disclosed 7.4% ownership in MIRUM PHARMACEUTICALS, INC. Common Stock, par value $0.0001 per share (MIRM) on 01 Nov 2025.
Change
- Previous schedule filing date: 20 Aug 2025.
- Current filing was accepted on 04 Nov 2025, 17:26.
Research use
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (14)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Frazier Life Sciences IX, L.P. | 7.1% | 3,566,912 | 0 | 3,566,912 | /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% | 3,566,912 | 0 | 3,566,912 | /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% | 3,566,912 | 0 | 3,566,912 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS IX, L.L.C. | 0001782791 |
| Frazier Life Sciences X, L.P. | 0.3% | 168,308 | 0 | 168,308 | /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% | 168,308 | 0 | 168,308 | /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% | 168,308 | 0 | 168,308 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS X, L.L.C. | 0001790811 |
| Frazier Life Sciences Public Fund, L.P. | 5% | 2,514,947 | 0 | 2,514,947 | /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% | 2,514,947 | 0 | 2,514,947 | /s/ Steve R. Bailey | Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P. | 0001879466 |
| FHMLSP, L.L.C. | 5% | 2,514,947 | 0 | 2,514,947 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLSP, L.L.C. | 0001879465 |
| Frazier Life Sciences XI, L.P. | 1.1% | 544,954 | 0 | 544,954 | /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% | 544,954 | 0 | 544,954 | /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% | 544,954 | 0 | 544,954 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS XI, L.L.C. | 0001911623 |
| James N. Topper | 7.4% | 3,735,220 | 0 | 3,735,220 | /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% | 3,735,220 | 82,482 | 3,735,220 | /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 |
CIK / CUSIP context first