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: 6.8%.
- Date of event: 23 Jan 2026.
Frazier Life Sciences IX, L.P. - 23 Jan 2026 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
- Patrick J. Heron
- Symbol
- MIRM
- Shares outstanding
- 60,417,706 shares
- Disclosed Ownership
- 4,108,404 shares
- Ownership
- 6.8%
- Form type
- SCHEDULE 13D/A
- Filing time
- 27 Jan 2026, 16:12:31 UTC
- Date of event
- 23 Jan 2026
- Previous filing
- 04 Nov 2025
- SEC
- View on sec.gov
Key filing fact
Frazier Life Sciences IX, L.P. disclosed 6.8% ownership in MIRUM PHARMACEUTICALS, INC. Common Stock, par value $0.0001 per share (MIRM) on 23 Jan 2026.
Change
- Previous schedule filing date: 04 Nov 2025.
- Current filing was accepted on 27 Jan 2026, 16:12.
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 (17)
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. | 5.9% | 3,566,912 | 0 | 3,566,912 | /s/ Jennifer Martin | By Jennifer Martin, 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. | 5.9% | 3,566,912 | 0 | 3,566,912 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS IX, L.L.C., GP of FHMLS IX, L.P. | 0001782789 |
| FHMLS IX, L.L.C. | 5.9% | 3,566,912 | 0 | 3,566,912 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS IX, L.L.C. | 0001782791 |
| Frazier Life Sciences X, L.P. | 0.8% | 459,010 | 0 | 459,010 | /s/ Jennifer Martin | By Jennifer Martin, 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. | 0.8% | 459,010 | 0 | 459,010 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P. | 0001790880 |
| FHMLS X, L.L.C. | 0.8% | 459,010 | 0 | 459,010 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS X, L.L.C. | 0001790811 |
| Frazier Life Sciences Public Fund, L.P. | 4.2% | 2,514,947 | 0 | 2,514,947 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P., GP of Frazier Life Sciences Public Fund, L.P. | 0001863769 |
| FHMLSP, L.P. | 4.2% | 2,514,947 | 0 | 2,514,947 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P. | 0001879466 |
| FHMLSP, L.L.C. | 4.2% | 2,514,947 | 0 | 2,514,947 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLSP, L.L.C. | 0001879465 |
| Frazier Life Sciences XI, L.P. | 1.8% | 1,075,884 | 0 | 1,075,884 | /s/ Jennifer Martin | By Jennifer Martin, 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. | 1.8% | 1,075,884 | 0 | 1,075,884 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P. | 0001911580 |
| FHMLS XI, L.L.C. | 1.8% | 1,075,884 | 0 | 1,075,884 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS XI, L.L.C. | 0001911623 |
| Frazier Life Sciences XII, L.P. | 0.1% | 62,931 | 0 | 62,931 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS XII, L.L.C., GP of FHMLS XII, L.P., GP of Frazier Life Sciences XII, L.P. | 0002052255 |
| FHMLS XII, L.P. | 0.1% | 62,931 | 0 | 62,931 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS XII, L.L.C., GP of FHMLS XII, L.P. | 0002052246 |
| FHMLS XII, L.L.C. | 0.1% | 62,931 | 0 | 62,931 | /s/ Jennifer Martin | By Jennifer Martin, CFO of FHMLS XII, L.L.C. | 0002052177 |
| James N. Topper | 6.7% | 4,025,922 | 0 | 4,025,922 | /s/ Jennifer Martin | By Jennifer Martin, Attorney-in-Fact for Patrick J. Heron, pursuant to Power of Attorney | 0001341382 |
| Patrick J. Heron | 6.8% | 4,108,404 | 82,482 | 4,025,922 | /s/ Jennifer Martin | By Jennifer Martin, Attorney-in-Fact for Patrick J. Heron, pursuant to Power of Attorney | 0001365617 |
CIK / CUSIP context first