SAN DIEGO, CA
ATRIUM THERAPEUTICS, INC.RNA— Latest position per institution from SEC 13F filings
15
Institutional holders
12.22M
Total shares held
144.39M
Estimated value
611.13K
Avg. position size
SESSA CAPITAL IM, L.P.
CIK 1595849
Shares
1.50M
Value
20.18M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
1.47M
Value
19.81K
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
1.45M
Value
19.47M
Filed
Jun 30, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
864.10K
Value
11.55M
Filed
Mar 31, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
840.60K
Value
11.31M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
730.83K
Value
9.83M
Filed
Jun 30, 2026
CRCM LP
CIK 1483234
Shares
641.54K
Value
8.63M
Filed
Jun 30, 2026
PENTWATER CAPITAL MANAGEMENT LP
CIK 1425851
Shares
602.65K
Value
8.06M
Filed
Mar 31, 2026
O'CONNOR ALTERNATIVE INVESTMENTS, LLC
CIK 2081629
Shares
578.01K
Value
7.73M
Filed
Mar 31, 2026
TIG ADVISORS, LLC
CIK 1358253
Shares
561.53K
Value
7.55M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
386.93K
Value
5.21M
Filed
Jun 30, 2026
FARALLON CAPITAL MANAGEMENT, L.L.C.
CIK 909661
Shares
349.36K
Value
4.67M
Filed
Mar 31, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
345.48K
Value
4.65M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
310.34K
Value
4.17M
Filed
Jun 30, 2026
683 CAPITAL MANAGEMENT, LLC
CIK 1404574
Shares
300K
Value
4.04M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
271.76K
Value
3.66M
Filed
Jun 30, 2026
BELLEVUE GROUP AG
CIK 1674546
Shares
263.10K
Value
3.52M
Filed
Mar 31, 2026
ARBITER PARTNERS CAPITAL MANAGEMENT LLC
CIK 1513193
Shares
261.29K
Value
3.51M
Filed
Jun 30, 2026
CANTOR FITZGERALD, L. P.
CIK 1024896
Shares
256.92K
Value
3.46M
Filed
Jun 30, 2026
SLOTNIK CAPITAL, LLC
CIK 1963764
Shares
237.64K
Value
3.20M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | SESSA CAPITAL IM, L.P. | 1595849 | 1.50M | 20.18M | Jun 30, 2026 |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 1.47M | 19.81K | Jun 30, 2026 |
| 3 | BLACKROCK, INC. | 2012383 | 1.45M | 19.47M | Jun 30, 2026 |
| 4 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 864.10K | 11.55M | Mar 31, 2026 |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 840.60K | 11.31M | Jun 30, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 730.83K | 9.83M | Jun 30, 2026 |
| 7 | CRCM LP | 1483234 | 641.54K | 8.63M | Jun 30, 2026 |
| 8 | PENTWATER CAPITAL MANAGEMENT LP | 1425851 | 602.65K | 8.06M | Mar 31, 2026 |
| 9 | O'CONNOR ALTERNATIVE INVESTMENTS, LLC | 2081629 | 578.01K | 7.73M | Mar 31, 2026 |
| 10 | TIG ADVISORS, LLC | 1358253 | 561.53K | 7.55M | Jun 30, 2026 |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 386.93K | 5.21M | Jun 30, 2026 |
| 12 | FARALLON CAPITAL MANAGEMENT, L.L.C. | 909661 | 349.36K | 4.67M | Mar 31, 2026 |
| 13 | TWO SIGMA INVESTMENTS, LP | 1179392 | 345.48K | 4.65M | Jun 30, 2026 |
| 14 | GOLDMAN SACHS GROUP INC | 886982 | 310.34K | 4.17M | Jun 30, 2026 |
| 15 | 683 CAPITAL MANAGEMENT, LLC | 1404574 | 300K | 4.04M | Jun 30, 2026 |
| 16 | STATE STREET CORP | 93751 | 271.76K | 3.66M | Jun 30, 2026 |
| 17 | BELLEVUE GROUP AG | 1674546 | 263.10K | 3.52M | Mar 31, 2026 |
| 18 | ARBITER PARTNERS CAPITAL MANAGEMENT LLC | 1513193 | 261.29K | 3.51M | Jun 30, 2026 |
| 19 | CANTOR FITZGERALD, L. P. | 1024896 | 256.92K | 3.46M | Jun 30, 2026 |
| 20 | SLOTNIK CAPITAL, LLC | 1963764 | 237.64K | 3.20M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.