FLORHAM PARK, NJ
PHATHOM PHARMACEUTICALS, INC.PHAT— Latest position per institution from SEC 13F filings
15
Institutional holders
69.50M
Total shares held
720.17M
Estimated value
3.47M
Avg. position size
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
12.47M
Value
135.26M
Filed
Jun 30, 2026
MEDICXI VENTURES MANAGEMENT (JERSEY) LTD
CIK 1715579
Shares
7.46M
Value
80.99M
Filed
Jun 30, 2026
JENNISON ASSOCIATES LLC
CIK 53417
Shares
7.04M
Value
44.16M
Filed
Mar 31, 2025
BLACKROCK, INC.
CIK 2012383
Shares
4.53M
Value
49.10M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
4.03M
Value
43.72M
Filed
Jun 30, 2026
CARLYLE GROUP INC.
CIK 1527166
Shares
3.50M
Value
37.94M
Filed
Jun 30, 2026
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
3.38M
Value
36.63M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
3.18M
Value
52.71M
Filed
Dec 31, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.93M
Value
30.14M
Filed
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.66M
Value
28.83M
Filed
Jun 30, 2026
CHECKPOINT CAPITAL L.P.
CIK 1977548
Shares
2.27M
Value
18.47M
Filed
Dec 31, 2024
GW&K INVESTMENT MANAGEMENT, LLC
CIK 1082917
Shares
2.17M
Value
23.51K
Filed
Jun 30, 2026
FRANKLIN RESOURCES INC
CIK 38777
Shares
1.97M
Value
21.38M
Filed
Jun 30, 2026
NEA MANAGEMENT COMPANY, LLC
CIK 1512848
Shares
1.96M
Value
21.27M
Filed
Jun 30, 2026
683 CAPITAL MANAGEMENT, LLC
CIK 1404574
Shares
1.85M
Value
20.07M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.78M
Value
19.29M
Filed
Jun 30, 2026
PORTOLAN CAPITAL MANAGEMENT, LLC
CIK 1350290
Shares
1.70M
Value
30.73M
Filed
Sep 30, 2024
STATE STREET CORP
CIK 93751
Shares
1.59M
Value
17.21M
Filed
Jun 30, 2026
TAKEDA PHARMACEUTICAL CO LTD
CIK 1395064
Shares
1.56M
Value
16.04M
Filed
Jun 30, 2024
CATALYS PACIFIC, LLC
CIK 2011385
Shares
1.49M
Value
16.21M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 12.47M | 135.26M | Jun 30, 2026 |
| 2 | MEDICXI VENTURES MANAGEMENT (JERSEY) LTD | 1715579 | 7.46M | 80.99M | Jun 30, 2026 |
| 3 | JENNISON ASSOCIATES LLC | 53417 | 7.04M | 44.16M | Mar 31, 2025 |
| 4 | BLACKROCK, INC. | 2012383 | 4.53M | 49.10M | Jun 30, 2026 |
| 5 | INVESCO LTD. | 914208 | 4.03M | 43.72M | Jun 30, 2026 |
| 6 | CARLYLE GROUP INC. | 1527166 | 3.50M | 37.94M | Jun 30, 2026 |
| 7 | MILLENNIUM MANAGEMENT LLC | 1273087 | 3.38M | 36.63M | Jun 30, 2026 |
| 8 | VANGUARD GROUP INC | 102909 | 3.18M | 52.71M | Dec 31, 2025 |
| 9 | BLACKROCK FINANCE, INC. | 1364742 | 2.93M | 30.14M | Jun 30, 2024 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.66M | 28.83M | Jun 30, 2026 |
| 11 | CHECKPOINT CAPITAL L.P. | 1977548 | 2.27M | 18.47M | Dec 31, 2024 |
| 12 | GW&K INVESTMENT MANAGEMENT, LLC | 1082917 | 2.17M | 23.51K | Jun 30, 2026 |
| 13 | FRANKLIN RESOURCES INC | 38777 | 1.97M | 21.38M | Jun 30, 2026 |
| 14 | NEA MANAGEMENT COMPANY, LLC | 1512848 | 1.96M | 21.27M | Jun 30, 2026 |
| 15 | 683 CAPITAL MANAGEMENT, LLC | 1404574 | 1.85M | 20.07M | Jun 30, 2026 |
| 16 | GOLDMAN SACHS GROUP INC | 886982 | 1.78M | 19.29M | Jun 30, 2026 |
| 17 | PORTOLAN CAPITAL MANAGEMENT, LLC | 1350290 | 1.70M | 30.73M | Sep 30, 2024 |
| 18 | STATE STREET CORP | 93751 | 1.59M | 17.21M | Jun 30, 2026 |
| 19 | TAKEDA PHARMACEUTICAL CO LTD | 1395064 | 1.56M | 16.04M | Jun 30, 2024 |
| 20 | CATALYS PACIFIC, LLC | 2011385 | 1.49M | 16.21M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.