CAMBRIDGE, MA
AMYLYX PHARMACEUTICALS, INC.AMLX— Latest position per institution from SEC 13F filings
15
Institutional holders
94.43M
Total shares held
1.27B
Estimated value
4.72M
Avg. position size
FMR LLC
CIK 315066
Shares
16.63M
Value
231.16M
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
8.83M
Value
122.72M
Filed
Mar 31, 2026
PERCEPTIVE ADVISORS LLC
CIK 1224962
Shares
8.28M
Value
115.16M
Filed
Mar 31, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
6.24M
Value
86.79M
Filed
Mar 31, 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
78.53M
Filed
Mar 31, 2026
JANUS HENDERSON GROUP PLC
CIK 1274173
Shares
4.99M
Value
69.26M
Filed
Mar 31, 2026
SATURN V CAPITAL MANAGEMENT LP
CIK 1964437
Shares
4.35M
Value
60.46M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
4.14M
Value
57.57M
Filed
Mar 31, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
3.56M
Value
49.49M
Filed
Mar 31, 2026
FIRST LIGHT ASSET MANAGEMENT, LLC
CIK 1600004
Shares
3.19M
Value
44.35M
Filed
Mar 31, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 938206
Shares
2.99M
Value
41.52M
Filed
Mar 31, 2026
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
2.96M
Value
43.61M
Filed
Dec 31, 2023
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.67M
Value
5.07M
Filed
Jun 30, 2024
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
2.63M
Value
36.50M
Filed
Mar 31, 2026
STONEPINE CAPITAL MANAGEMENT, LLC
CIK 1440771
Shares
2.50M
Value
36.80M
Filed
Dec 31, 2023
STATE STREET CORP
CIK 93751
Shares
2.36M
Value
32.85M
Filed
Mar 31, 2026
FRANKLIN RESOURCES INC
CIK 38777
Shares
2.26M
Value
31.44M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.21M
Value
30.74M
Filed
Mar 31, 2026
MORGAN STANLEY
CIK 895421
Shares
2.18M
Value
30.24M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FMR LLC | 315066 | 16.63M | 231.16M | Mar 31, 2026 |
| 2 | BLACKROCK, INC. | 2012383 | 8.83M | 122.72M | Mar 31, 2026 |
| 3 | PERCEPTIVE ADVISORS LLC | 1224962 | 8.28M | 115.16M | Mar 31, 2026 |
| 4 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 6.24M | 86.79M | Mar 31, 2026 |
| 5 | VANGUARD GROUP INC | 102909 | 5.80M | 70.12M | Dec 31, 2025 |
| 6 | COMMODORE CAPITAL LP | 1831942 | 5.65M | 78.53M | Mar 31, 2026 |
| 7 | JANUS HENDERSON GROUP PLC | 1274173 | 4.99M | 69.26M | Mar 31, 2026 |
| 8 | SATURN V CAPITAL MANAGEMENT LP | 1964437 | 4.35M | 60.46M | Mar 31, 2026 |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 4.14M | 57.57M | Mar 31, 2026 |
| 10 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 3.56M | 49.49M | Mar 31, 2026 |
| 11 | FIRST LIGHT ASSET MANAGEMENT, LLC | 1600004 | 3.19M | 44.35M | Mar 31, 2026 |
| 12 | DRIEHAUS CAPITAL MANAGEMENT LLC | 938206 | 2.99M | 41.52M | Mar 31, 2026 |
| 13 | VIKING GLOBAL INVESTORS LP | 1103804 | 2.96M | 43.61M | Dec 31, 2023 |
| 14 | BLACKROCK FINANCE, INC. | 1364742 | 2.67M | 5.07M | Jun 30, 2024 |
| 15 | GOLDMAN SACHS GROUP INC | 886982 | 2.63M | 36.50M | Mar 31, 2026 |
| 16 | STONEPINE CAPITAL MANAGEMENT, LLC | 1440771 | 2.50M | 36.80M | Dec 31, 2023 |
| 17 | STATE STREET CORP | 93751 | 2.36M | 32.85M | Mar 31, 2026 |
| 18 | FRANKLIN RESOURCES INC | 38777 | 2.26M | 31.44M | Mar 31, 2026 |
| 19 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.21M | 30.74M | Mar 31, 2026 |
| 20 | MORGAN STANLEY | 895421 | 2.18M | 30.24M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.