CAMBRIDGE, MA
AMYLYX PHARMACEUTICALS, INC.AMLX— Latest position per institution from SEC 13F filings
15
Institutional holders
98.73M
Total shares held
1.66B
Estimated value
4.94M
Avg. position size
FMR LLC
CIK 315066
Shares
16.73M
Value
300.43M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
8.83M
Value
158.53M
Filed
Jun 30, 2026
PERCEPTIVE ADVISORS LLC
CIK 1224962
Shares
8.33M
Value
149.69M
Filed
Jun 30, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
6.24M
Value
112.14M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
5.80M
Value
70.12M
Filed
Dec 31, 2025
COMMODORE CAPITAL LP
CIK 1831942
Shares
5.65M
Value
101.47M
Filed
Jun 30, 2026
JUPITER TOPCO LLC
CIK 2146052
Shares
5.24M
Value
94.01M
Filed
Jun 30, 2026
JANUS HENDERSON GROUP LTD.
CIK 1274173
Shares
4.99M
Value
69.26M
Filed
Mar 31, 2026
SATURN V CAPITAL MANAGEMENT LP
CIK 1964437
Shares
4.62M
Value
83.05M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
4.22M
Value
75.87M
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
3.13M
Value
56.23M
Filed
Jun 30, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 938206
Shares
3.04M
Value
54.54M
Filed
Jun 30, 2026
FIRST LIGHT ASSET MANAGEMENT, LLC
CIK 1600004
Shares
3.02M
Value
54.30M
Filed
Jun 30, 2026
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
2.96M
Value
43.61M
Filed
Dec 31, 2023
FRANKLIN RESOURCES INC
CIK 38777
Shares
2.95M
Value
52.99M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
2.86M
Value
51.33M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.67M
Value
5.07M
Filed
Jun 30, 2024
STATE STREET CORP
CIK 93751
Shares
2.60M
Value
46.76M
Filed
Jun 30, 2026
STONEPINE CAPITAL MANAGEMENT, LLC
CIK 1440771
Shares
2.50M
Value
36.80M
Filed
Dec 31, 2023
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.34M
Value
41.95M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FMR LLC | 315066 | 16.73M | 300.43M | Jun 30, 2026 |
| 2 | BLACKROCK, INC. | 2012383 | 8.83M | 158.53M | Jun 30, 2026 |
| 3 | PERCEPTIVE ADVISORS LLC | 1224962 | 8.33M | 149.69M | Jun 30, 2026 |
| 4 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 6.24M | 112.14M | Jun 30, 2026 |
| 5 | VANGUARD GROUP INC | 102909 | 5.80M | 70.12M | Dec 31, 2025 |
| 6 | COMMODORE CAPITAL LP | 1831942 | 5.65M | 101.47M | Jun 30, 2026 |
| 7 | JUPITER TOPCO LLC | 2146052 | 5.24M | 94.01M | Jun 30, 2026 |
| 8 | JANUS HENDERSON GROUP LTD. | 1274173 | 4.99M | 69.26M | Mar 31, 2026 |
| 9 | SATURN V CAPITAL MANAGEMENT LP | 1964437 | 4.62M | 83.05M | Jun 30, 2026 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 4.22M | 75.87M | Jun 30, 2026 |
| 11 | MORGAN STANLEY | 895421 | 3.13M | 56.23M | Jun 30, 2026 |
| 12 | DRIEHAUS CAPITAL MANAGEMENT LLC | 938206 | 3.04M | 54.54M | Jun 30, 2026 |
| 13 | FIRST LIGHT ASSET MANAGEMENT, LLC | 1600004 | 3.02M | 54.30M | Jun 30, 2026 |
| 14 | VIKING GLOBAL INVESTORS LP | 1103804 | 2.96M | 43.61M | Dec 31, 2023 |
| 15 | FRANKLIN RESOURCES INC | 38777 | 2.95M | 52.99M | Jun 30, 2026 |
| 16 | GOLDMAN SACHS GROUP INC | 886982 | 2.86M | 51.33M | Jun 30, 2026 |
| 17 | BLACKROCK FINANCE, INC. | 1364742 | 2.67M | 5.07M | Jun 30, 2024 |
| 18 | STATE STREET CORP | 93751 | 2.60M | 46.76M | Jun 30, 2026 |
| 19 | STONEPINE CAPITAL MANAGEMENT, LLC | 1440771 | 2.50M | 36.80M | Dec 31, 2023 |
| 20 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.34M | 41.95M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.