SAN DIEGO, CA
ANAPTYSBIO, INCANAB— Latest position per institution from SEC 13F filings
15
Institutional holders
29.14M
Total shares held
1.24B
Estimated value
1.46M
Avg. position size
ECOR1 CAPITAL, LLC
CIK 1587114
Shares
7.88M
Value
437.03M
Filed
Mar 31, 2026
FAIRMOUNT FUNDS MANAGEMENT LLC
CIK 1802528
Shares
1.82M
Value
24.05M
Filed
Dec 31, 2024
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.77M
Value
44.35M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
1.68M
Value
93.25M
Filed
Mar 31, 2026
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
1.57M
Value
20.84M
Filed
Dec 31, 2024
VANGUARD GROUP INC
CIK 102909
Shares
1.54M
Value
74.85M
Filed
Dec 31, 2025
TANG CAPITAL MANAGEMENT LLC
CIK 1232621
Shares
1.33M
Value
73.81M
Filed
Mar 31, 2026
BOXER CAPITAL, LLC
CIK 1465837
Shares
1.30M
Value
43.55M
Filed
Sep 30, 2024
BOXER CAPITAL MANAGEMENT, LLC
CIK 2018299
Shares
1.30M
Value
24.17M
Filed
Mar 31, 2025
BRAIDWELL LP
CIK 1920938
Shares
1.05M
Value
18.85M
Filed
Sep 30, 2023
MORGAN STANLEY
CIK 895421
Shares
993.90K
Value
55.12M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
992.45K
Value
55.04M
Filed
Mar 31, 2026
AFFINITY ASSET ADVISORS, LLC
CIK 1773195
Shares
940K
Value
52.13M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
853.15K
Value
47.32M
Filed
Mar 31, 2026
ASSENAGON ASSET MANAGEMENT S.A.
CIK 1546007
Shares
839.93K
Value
25.72M
Filed
Sep 30, 2025
SANOFI
CIK 1121404
Shares
821.92K
Value
30.38M
Filed
Mar 31, 2026
PALO ALTO INVESTORS LP
CIK 1306923
Shares
638.16K
Value
35.39M
Filed
Mar 31, 2026
683 CAPITAL MANAGEMENT, LLC
CIK 1404574
Shares
625K
Value
34.66M
Filed
Mar 31, 2026
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 1009258
Shares
613K
Value
12.47M
Filed
Jun 30, 2023
D. E. SHAW & CO., INC.
CIK 1009207
Shares
579.30K
Value
32.13M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | ECOR1 CAPITAL, LLC | 1587114 | 7.88M | 437.03M | Mar 31, 2026 |
| 2 | FAIRMOUNT FUNDS MANAGEMENT LLC | 1802528 | 1.82M | 24.05M | Dec 31, 2024 |
| 3 | BLACKROCK FINANCE, INC. | 1364742 | 1.77M | 44.35M | Jun 30, 2024 |
| 4 | BLACKROCK, INC. | 2012383 | 1.68M | 93.25M | Mar 31, 2026 |
| 5 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 1.57M | 20.84M | Dec 31, 2024 |
| 6 | VANGUARD GROUP INC | 102909 | 1.54M | 74.85M | Dec 31, 2025 |
| 7 | TANG CAPITAL MANAGEMENT LLC | 1232621 | 1.33M | 73.81M | Mar 31, 2026 |
| 8 | BOXER CAPITAL, LLC | 1465837 | 1.30M | 43.55M | Sep 30, 2024 |
| 9 | BOXER CAPITAL MANAGEMENT, LLC | 2018299 | 1.30M | 24.17M | Mar 31, 2025 |
| 10 | BRAIDWELL LP | 1920938 | 1.05M | 18.85M | Sep 30, 2023 |
| 11 | MORGAN STANLEY | 895421 | 993.90K | 55.12M | Mar 31, 2026 |
| 12 | STATE STREET CORP | 93751 | 992.45K | 55.04M | Mar 31, 2026 |
| 13 | AFFINITY ASSET ADVISORS, LLC | 1773195 | 940K | 52.13M | Mar 31, 2026 |
| 14 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 853.15K | 47.32M | Mar 31, 2026 |
| 15 | ASSENAGON ASSET MANAGEMENT S.A. | 1546007 | 839.93K | 25.72M | Sep 30, 2025 |
| 16 | SANOFI | 1121404 | 821.92K | 30.38M | Mar 31, 2026 |
| 17 | PALO ALTO INVESTORS LP | 1306923 | 638.16K | 35.39M | Mar 31, 2026 |
| 18 | 683 CAPITAL MANAGEMENT, LLC | 1404574 | 625K | 34.66M | Mar 31, 2026 |
| 19 | DEERFIELD MANAGEMENT COMPANY, L.P. | 1009258 | 613K | 12.47M | Jun 30, 2023 |
| 20 | D. E. SHAW & CO., INC. | 1009207 | 579.30K | 32.13M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.