Phathom Pharmaceuticals, Inc.
PHAT- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001783183
No open-market purchases or sales by Phathom Pharmaceuticals, Inc. insiders were filed in the last 90 days; 161 institutions reported holding it in 13F filings for Q2 2026, worth $782.1M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Phathom Pharmaceuticals, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 173
- +40 vs. Q3 2025
- Shares held
- 62.0M
- −370.1K (−0.6%) vs. Q3 2025
- Total value
- $1.03B
- +$291.9M (+39.8%) vs. Q3 2025
- New holders
- 50
- 49 more added
- Sold out
- 10
- 50 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PHAT on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 161 | $782.1M |
| Q1 2026 | 174 | $765.5M |
| Q4 2025 | 173 | $1.03B |
| Q3 2025 | 133 | $733.6M |
| Q2 2025 | 117 | $550.5M |
| Q1 2025 | 137 | $401.4M |
| Q4 2024 | 144 | $541.2M |
| Q3 2024 | 133 | $1.31B |
| Q2 2024 | 114 | $598.6M |
| Q1 2024 | 114 | $588.2M |
| Q4 2023 | 117 | $503.3M |
| Q3 2023 | 110 | $452.7M |
| Q2 2023 | 103 | $612.6M |
| Q1 2023 | 84 | $219.7M |
| Q4 2022 | 87 | $316.6M |
| Q3 2022 | 94 | $334.3M |
| Q2 2022 | 94 | $230.0M |
| Q1 2022 | 82 | $349.1M |
| Q4 2021 | 83 | $562.0M |
| Q3 2021 | 84 | $819.8M |
| Q2 2021 | 79 | $843.6M |
| Q1 2021 | 84 | $919.2M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Phathom Pharmaceuticals, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| XTX Topco Ltd | 39,400 | $653.6K | 0.02% | −15,187−27.8% | Reduced |
| California State Teachers Retirement System | 40,143 | $666.0K | 0.00% | +37,252+1,288.6% | Added |
| New York State Common Retirement Fund | 41,756 | $692.7K | 0.00% | +30,986+287.7% | Added |
| Southeast Asset Advisors Inc. | 42,874 | $711.3K | 0.07% | +42,874 | New |
| ADAR1 Capital Management, LLC | 42,900 | $711.7K | 0.05% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 44,258 | $734.2K | 0.01% | +44,258 | New |
| Virtus Investment Advisers, Inc. | 46,937 | $778.7K | 0.21% | +2,631+5.9% | Added |
| Alliancebernstein L.P. | 49,390 | $819.4K | 0.00% | +3,800+8.3% | Added |
| Stratos Wealth Partners, LTD. | 50,300 | $834.5K | 0.01% | +50,300 | New |
| Stifel Financial Corp | 51,661 | $857.1K | 0.00% | +31,794+160.0% | Added |
| Rhumbline Advisers | 52,093 | $864.2K | 0.00% | −9,620−15.6% | Reduced |
| AQR Capital Management LLC | 54,448 | $903.3K | 0.00% | +1,819+3.5% | Added |
| Two Sigma Investments, LP | 57,783 | $958.6K | 0.00% | +57,783 | New |
| Dark Forest Capital Management LP | 62,248 | $1.03M | 0.05% | +62,248 | New |
| Penn Mutual Asset Management, LLC | 62,802 | $1.04M | 0.62% | 00.0% | Unchanged |
| Wells Fargo & Company | 68,016 | $1.13M | 0.00% | +14,368+26.8% | Added |
| Creative Planning | 80,766 | $1.34M | 0.00% | +2,708+3.5% | Added |
| Gsa Capital Partners LLP | 82,624 | $1.37M | 0.12% | +12,366+17.6% | Added |
| Swiss National Bank | 84,000 | $1.39M | 0.00% | +84,000 | New |
| Barclays PLC | 84,859 | $1.41M | 0.00% | −43,497−33.9% | Reduced |
| VARCOV Co. | 86,759 | $1.44M | 0.57% | +86,759 | New |
| Group One Trading, L.P. | 103,684 | $1.72M | 0.05% | +99,436+2,340.8% | Added |
| Nuveen, LLC | 108,846 | $1.81M | 0.00% | −1,264−1.1% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 114,981 | $1.91M | 0.07% | +114,981 | New |
| Campbell & CO Investment Adviser LLC | 115,284 | $1.91M | 0.09% | +115,284 | New |
| Morgan Stanley | 117,781 | $1.95M | 0.00% | −137,792−53.9% | Reduced |
| Bank of New York Mellon Corp | 122,967 | $2.04M | 0.00% | −4,415−3.5% | Reduced |
| Wellington Management Group LLP | 134,546 | $2.23M | 0.00% | −11,913−8.1% | Reduced |
| Trexquant Investment LP | 136,824 | $2.27M | 0.02% | +58,641+75.0% | Added |
| Gilder Gagnon Howe & Co LLC | 145,174 | $2.41M | 0.03% | +56,632+64.0% | Added |
| Hussman Strategic Advisors, Inc. | 147,000 | $2.44M | 0.59% | +147,000 | New |
| Caxton Associates LLP | 181,968 | $3.02M | 0.06% | +143,398+371.8% | Added |
| Ameriprise Financial Inc | 185,744 | $3.08M | 0.00% | −368,846−66.5% | Reduced |
| Woodline Partners LP | 187,291 | $3.11M | 0.01% | 00.0% | Unchanged |
| GWM Advisors LLC | 200,823 | $3.16M | 0.01% | −700−0.3% | Reduced |
| Birchview Capital, LP | 195,000 | $3.24M | 1.89% | +110,000+129.4% | Added |
| Avidity Partners Management LP | 206,076 | $3.42M | 0.99% | −99,924−32.7% | Reduced |
| Balyasny Asset Management LLC | 207,085 | $3.44M | 0.01% | −88,076−29.8% | Reduced |
| Bank of America Corp | 258,996 | $4.30M | 0.00% | +9,902+4.0% | Added |
| D. E. Shaw & Co., Inc. | 261,068 | $4.33M | 0.00% | +261,068 | New |
| Susquehanna Portfolio Strategies, LLC | 267,962 | $4.45M | 0.07% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 276,989 | $4.60M | 0.09% | +218,892+376.8% | Added |
| JPMorgan Chase & Co | 296,684 | $4.92M | 0.00% | +159,736+116.6% | Added |
| StepStone Group LP | 422,085 | $4.97M | 2.66% | 00.0% | Unchanged |
| UBS Group AG | 304,383 | $5.05M | 0.00% | −33,977−10.0% | Reduced |
| Citadel Advisors LLC | 311,315 | $5.16M | 0.00% | −197,405−38.8% | Reduced |
| Simplify Asset Management Inc. | 321,935 | $5.34M | 0.09% | 00.0% | Unchanged |
| Northern Trust Corp | 356,466 | $5.91M | 0.00% | −1,112−0.3% | Reduced |
| Jane Street Group, LLC | 384,770 | $6.38M | 0.01% | +277,508+258.7% | Added |
| Goldman Sachs Group Inc | 392,045 | $6.50M | 0.00% | +240,013+157.9% | Added |
| Next Century Growth Investors LLC | 393,774 | $6.53M | 0.45% | +393,774 | New |
| Charles Schwab Investment Management Inc | 397,910 | $6.60M | 0.00% | +32,006+8.7% | Added |
| SummitTX Capital, L.P. | 517,820 | $8.59M | 0.26% | +131,852+34.2% | Added |
| Susquehanna International Group, LLP | 549,171 | $9.11M | 0.01% | +394,894+256.0% | Added |
| Moore Capital Management, LP | 600,000 | $9.95M | 0.20% | 00.0% | Unchanged |
| Divisadero Street Capital Management, LP | 662,312 | $11.0M | 0.63% | +662,312 | New |
| Catalio Capital Management, LP | 698,996 | $11.6M | 2.05% | −429,525−38.1% | Reduced |
| Propel Bio Management, LLC | 740,918 | $12.3M | 10.49% | +187,991+34.0% | Added |
| Geode Capital Management, LLC | 1,073,434 | $17.8M | 0.00% | −15,476−1.4% | Reduced |
| State Street Corp | 1,149,536 | $19.1M | 0.00% | +95,945+9.1% | Added |
| GW&K Investment Management, LLC | 1,306,678 | $21.7M | 0.19% | +162,348+14.2% | Added |
| Wasatch Advisors Inc | 1,331,669 | $22.1M | 0.13% | −205,549−13.4% | Reduced |
| Catalys Pacific, LLC | 1,429,014 | $23.7M | 7.63% | +261,900+22.4% | Added |
| 683 Capital Management, LLC | 1,785,000 | $29.6M | 2.46% | −35,380−1.9% | Reduced |
| NEA Management Company, LLC | 1,960,169 | $32.5M | 1.66% | 00.0% | Unchanged |
| Millennium Management LLC | 2,082,180 | $34.5M | 0.02% | −2,999,271−59.0% | Reduced |
| Ensign Peak Advisors, Inc | 2,352,020 | $39.0M | 0.07% | −151,324−6.0% | Reduced |
| Vanguard Group Inc | 3,177,211 | $52.7M | 0.00% | −38,361−1.2% | Reduced |
| Carlyle Group Inc. | 3,496,808 | $58.0M | 0.43% | 00.0% | Unchanged |
| BlackRock, Inc. | 3,555,548 | $59.0M | 0.00% | +153,224+4.5% | Added |
| Invesco Ltd. | 3,920,446 | $65.0M | 0.01% | +55,475+1.4% | Added |
| Medicxi Ventures Management (Jersey) Ltd | 7,464,572 | $123.8M | 14.83% | 00.0% | Unchanged |
| Frazier Life Sciences Management, L.P. | 12,466,489 | $206.8M | 5.55% | 00.0% | Unchanged |
| AIGH Capital Management LLC | 0 | $0 | 0.00% | −429,000−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −290,467−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −30,968−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −30,272−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −16,500−100.0% | Sold out |
| Kestra Private Wealth Services, LLC | 0 | $0 | 0.00% | −15,500−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −7,007−100.0% | Sold out |
| Leonteq Securities AG | 0 | $0 | 0.00% | −4,800−100.0% | Sold out |
| Bear Mountain Capital, Inc. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −23−100.0% | Sold out |