BOSTON, MA
AKTIS ONCOLOGY, INC.AKTS— Latest position per institution from SEC 13F filings
15
Institutional holders
31.88M
Total shares held
916.16M
Estimated value
1.59M
Avg. position size
MPM BIOIMPACT LLC
CIK 1687078
Shares
4.84M
Value
155.86M
Filed
Jun 30, 2026
ECOR1 CAPITAL, LLC
CIK 1587114
Shares
4.82M
Value
155.49M
Filed
Jun 30, 2026
BLUE OWL CAPITAL HOLDINGS LP
CIK 1858703
Shares
3.07M
Value
98.95M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
2.28M
Value
73.43M
Filed
Jun 30, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
CIK 1897612
Shares
2.05M
Value
66.12K
Filed
Jun 30, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.97M
Value
63.37M
Filed
Jun 30, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
1.59M
Value
51.31M
Filed
Jun 30, 2026
JANUS HENDERSON GROUP LTD.
CIK 1274173
Shares
1.45M
Value
26.02M
Filed
Mar 31, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
1.31M
Value
42.36M
Filed
Jun 30, 2026
JUPITER TOPCO LLC
CIK 2146052
Shares
1.31M
Value
42.36M
Filed
Jun 30, 2026
BAKER BROS. ADVISORS LP
CIK 1263508
Shares
996.35K
Value
32.11M
Filed
Jun 30, 2026
OCTAGON CAPITAL ADVISORS LP
CIK 1839435
Shares
960.85K
Value
30.97M
Filed
Jun 30, 2026
MERCK & CO., INC.
CIK 310158
Shares
952.84K
Value
30.71M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
817.08K
Value
26.33M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
763.50K
Value
24.61K
Filed
Jun 30, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
696.56K
Value
22.45M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
520.74K
Value
16.79M
Filed
Jun 30, 2026
EVENTIDE ASSET MANAGEMENT, LLC
CIK 1442891
Shares
507K
Value
16.34M
Filed
Jun 30, 2026
AVIDITY PARTNERS MANAGEMENT LP
CIK 1791827
Shares
484.20K
Value
15.61M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
484.01K
Value
15.60M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | MPM BIOIMPACT LLC | 1687078 | 4.84M | 155.86M | Jun 30, 2026 |
| 2 | ECOR1 CAPITAL, LLC | 1587114 | 4.82M | 155.49M | Jun 30, 2026 |
| 3 | BLUE OWL CAPITAL HOLDINGS LP | 1858703 | 3.07M | 98.95M | Jun 30, 2026 |
| 4 | BLACKROCK, INC. | 2012383 | 2.28M | 73.43M | Jun 30, 2026 |
| 5 | T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | 1897612 | 2.05M | 66.12K | Jun 30, 2026 |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.97M | 63.37M | Jun 30, 2026 |
| 7 | RTW INVESTMENTS, LP | 1493215 | 1.59M | 51.31M | Jun 30, 2026 |
| 8 | JANUS HENDERSON GROUP LTD. | 1274173 | 1.45M | 26.02M | Mar 31, 2026 |
| 9 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 1.31M | 42.36M | Jun 30, 2026 |
| 10 | JUPITER TOPCO LLC | 2146052 | 1.31M | 42.36M | Jun 30, 2026 |
| 11 | BAKER BROS. ADVISORS LP | 1263508 | 996.35K | 32.11M | Jun 30, 2026 |
| 12 | OCTAGON CAPITAL ADVISORS LP | 1839435 | 960.85K | 30.97M | Jun 30, 2026 |
| 13 | MERCK & CO., INC. | 310158 | 952.84K | 30.71M | Jun 30, 2026 |
| 14 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 817.08K | 26.33M | Jun 30, 2026 |
| 15 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 763.50K | 24.61K | Jun 30, 2026 |
| 16 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 696.56K | 22.45M | Jun 30, 2026 |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 520.74K | 16.79M | Jun 30, 2026 |
| 18 | EVENTIDE ASSET MANAGEMENT, LLC | 1442891 | 507K | 16.34M | Jun 30, 2026 |
| 19 | AVIDITY PARTNERS MANAGEMENT LP | 1791827 | 484.20K | 15.61M | Jun 30, 2026 |
| 20 | STATE STREET CORP | 93751 | 484.01K | 15.60M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.