Quick Takeaways
- Frazier Life Sciences Public Fund, L.P. filed SCHEDULE 13D/A for PHATHOM PHARMACEUTICALS, INC. Common Stock, $0.0001 par value per share (PHAT).
- Disclosed ownership: 8.6%.
- Date of event: 01 Nov 2025.
Frazier Life Sciences Public Fund, L.P. - 01 Nov 2025 SCHEDULE 13D/A Report for PHATHOM PHARMACEUTICALS, INC. Common Stock, $0.0001 par value per share (PHAT)
- Filing Manager
- Frazier Life Sciences Public Fund, L.P.
- Reporting Manager
- James N. Topper
- Symbol
- PHAT
- Shares outstanding
- 69,596,826 shares
- Disclosed Ownership
- 5,985,327 shares
- Ownership
- 8.6%
- Form type
- SCHEDULE 13D/A
- Filing time
- 04 Nov 2025, 17:24:56 UTC
- Date of event
- 01 Nov 2025
- Previous filing
- 20 Aug 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Frazier Life Sciences Public Fund, L.P. disclosed 8.6% ownership in PHATHOM PHARMACEUTICALS, INC. Common Stock, $0.0001 par value per share (PHAT) on 01 Nov 2025."
What Changed
- Previous schedule filing date: 20 Aug 2025.
- Current filing was accepted on 04 Nov 2025, 17:24.
Why This Matters
- 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.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (17)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Frazier Life Sciences Public Fund, L.P. | 7.5% | 5,323,356 | 0 | 5,323,356 | /s/ Steve R. Bailey | By 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. | 7.5% | 5,323,356 | 0 | 5,323,356 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P. | 0001879466 |
| FHMLSP, L.L.C. | 7.5% | 5,323,356 | 0 | 5,323,356 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLSP, L.L.C. | 0001879465 |
| Frazier Life Sciences X, L.P. | 0.1% | 59,403 | 0 | 59,403 | /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. | 0.1% | 59,403 | 0 | 59,403 | /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. | 0.1% | 59,403 | 0 | 59,403 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS X, L.L.C. | 0001790811 |
| Frazier Life Sciences XI, L.P. | 1.4% | 980,286 | 0 | 980,286 | /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. | 1.4% | 980,286 | 0 | 980,286 | /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. | 1.4% | 980,286 | 0 | 980,286 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS XI, L.L.C. | 0001911623 |
| Frazier Life Sciences IX, L.P. | 8.2% | 5,827,415 | 0 | 5,827,415 | /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. | 8.2% | 5,827,415 | 0 | 5,827,415 | /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. | 8.2% | 5,827,416 | 0 | 5,827,416 | /s/ Steve R. Bailey | By Steve R. Bailey, CFO of FHMLS IX, L.L.C. | 0001782791 |
| Frazier Life Sciences XII, L.P. | 0.4% | 276,029 | 0 | 276,029 | /s/ Gordon Empey | By Gordon Empey, General Counsel 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. | 0.4% | 276,029 | 0 | 276,029 | /s/ Gordon Empey | By Gordon Empey, General Counsel of FHMLS XII, L.L.C., GP of FHMLS XII, L.P. | 0002052246 |
| FHMLS XII, L.L.C. | 0.4% | 276,029 | 0 | 276,029 | /s/ Gordon Empey | By Gordon Empey, General Counsel of FHMLS XII, L.L.C. | 0002052177 |
| James N. Topper | 8.6% | 5,985,327 | 98,508 | 5,886,819 | /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 | 8.4% | 5,901,756 | 14,937 | 5,886,819 | /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 |