GILDER GAGNON HOWE & CO LLC
Position in PHAT — Phathom Pharmaceuticals, Inc.
CIK 902464
New York, NY
Position in PHAT
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$956,253
-$597,913 QoQ
Shares Held
88,134
-37.0% QoQ
Ownership
0.109%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#63
of 161 holders
Holding Since
Mar 2021
22 quarters on record
Voting authority
Sole 0%
Shared 0%
None 100%
Common Shares in PHAT Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026GILDER GAGNON HOWE & CO LLC holds $353,222,516 across 21 Biotechnology names. PHAT ranks #19 (0.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
269,051 | $80,992,422 | |
| 2 | NKTR |
Nektar Therapeutics
|
600,873 | $41,946,944 | |
| 3 | BBIO |
BridgeBio Pharma, Inc.
|
548,926 | $40,884,008 | |
| 4 | ARQT |
Arcutis Biotherapeutics, Inc.
|
1,313,211 | $34,432,392 | |
| 5 | CYTK |
Cytokinetics Inc
|
400,245 | $34,096,871 | |
| 6 | KYMR |
Kymera Therapeutics, Inc.
|
229,053 | $26,265,507 | |
| 7 | QURE |
uniQure N.V.
|
530,979 | $24,456,892 | |
| 8 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
28,573 | $15,342,272 |
All Filings in PHAT
Export CSV
22 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $956,253 | 88,134 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $1,554,166 | 139,889 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $2,408,436 | 145,174 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $1,042,139 | 88,542 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $300,723 | 31,358 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $260,618 | 41,566 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $337,873 | 41,610 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $29,341,724 | 1,622,883 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $15,164,267 | 1,472,259 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $10,807,092 | 1,017,617 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $13,285,355 | 1,455,132 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $13,585,197 | 1,310,048 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $15,187,863 | 1,060,605 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $3,954,339 | 553,829 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $6,191,498 | 551,827 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $6,121,057 | 552,442 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $4,693,526 | 556,105 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $7,571,147 | 556,293 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $10,740,901 | 546,055 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $17,662,704 | 550,240 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $18,499,769 | 546,522 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $30,738,540 | 818,385 | Shares | Defined | 2021-05-17 | |
| No filing history on record for this holder in this stock. | ||||||