Frazier Life Sciences Management, L.P.
Position in PHAT — Phathom Pharmaceuticals, Inc.
CIK 1892134
PALO ALTO, CA
Position in PHAT
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$138,502,692
-$68,316,360 QoQ
Shares Held
12,466,489
0.0% QoQ
Ownership
15.6%
of shares outstanding
% of Portfolio
3.57%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2022
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in PHAT Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Frazier Life Sciences Management, L.P. holds $3,802,745,091 across 34 Biotechnology names. PHAT ranks #7 (3.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MIRM |
Mirum Pharmaceuticals, Inc.
|
7,679,684 | $709,449,207 | |
| 2 | NAMS |
NewAmsterdam Pharma Co N.V.
|
16,943,774 | $542,370,205 | |
| 3 | ERAS |
Erasca, Inc.
|
24,675,188 | $399,244,541 | |
| 4 | BBIO |
BridgeBio Pharma, Inc.
|
3,448,139 | $256,058,802 | |
| 5 | ARQT |
Arcutis Biotherapeutics, Inc.
|
9,874,511 | $232,643,479 | |
| 6 | MBX |
MBX Biosciences, Inc.
|
6,652,013 | $198,562,588 | |
| 7 | PHAT |
Phathom Pharmaceuticals, Inc.
This page
|
12,466,489 | $138,502,692 | |
| 8 | MAZE |
Maze Therapeutics, Inc.
|
4,567,274 | $136,333,128 |
All Filings in PHAT
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $138,502,692 | 12,466,489 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $206,819,052 | 12,466,489 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $146,730,575 | 12,466,489 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $119,553,629 | 12,466,489 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $63,385,179 | 10,109,279 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $82,087,345 | 10,109,279 | Shares | Sole | 2025-02-18 | |
| 2024-09-30 | $182,775,764 | 10,109,279 | Shares | Sole | 2024-11-15 | |
| 2024-06-30 | $104,125,573 | 10,109,279 | Shares | Sole | 2024-08-15 | |
| 2024-03-31 | $107,360,542 | 10,109,279 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $92,297,717 | 10,109,279 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $104,833,223 | 10,109,279 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $144,764,875 | 10,109,279 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $60,027,065 | 8,407,152 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $94,328,245 | 8,407,152 | Shares | Sole | 2023-02-07 | |
| 2022-09-30 | $93,151,244 | 8,407,152 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $49,183,382 | 5,827,415 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $79,311,118 | 5,827,415 | Shares | Sole | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||