ADAPY · Adaptimmune Therapeutics PLC · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“the Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company's ability to continue as a going concern within one year after the date the financial statements are issued.”View the 10-Q filed Aug 13, 2025
Every disclosed holder of ADAPY in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns ADAPY
13F quarter Mar 31, 2026| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 3,661 | 0.00% |
| Insiders (Forms 3, 4, 5) | 101,436,002 | 6.38% |
| 13D/G-only blocks | 136,730,266 | 8.60% |
| Remaining | 1,352,139,617 | 85.02% |
| Registered funds (N-PORT, not summed) | 273 | 0.00% |
Shares outstanding: 1,590,309,546, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of ADAPY
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BAILLIE GIFFORD & CO
13G
CIK 1088875 · Investment adviser · Dec 31, 2024
Rule 13d-1(b), qualified institution
|
70,914,570 | ||
| 2 |
EcoR1 Capital, LLC
13G
CIK 1587114 · Registered investment adviser · Aug 15, 2025
Rule 13d-1(b), qualified institution, not summed
|
66,000,000 | ||
| 2.1 |
|
100,371,882 | ||
| 3 |
BAKER BROS. ADVISORS LP
13G
CIK 1263508 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(b), qualified institution
|
65,815,692 | ||
| 4 |
|
986,352 | ||
| 5 |
|
44,327 | ||
| 6 |
|
18,421 | ||
| 7 |
|
7,510 | ||
| 8 |
|
7,510 | ||
| 9 |
RHUMBLINE ADVISERS
13F
CIK 1115418 · Registered investment adviser · Mar 31, 2026
|
3,661 | ||
| 10 |
Guggenheim Active Allocation Fund
Fund
· Registered fund · May 29, 2026
Guggenheim Active Allocation Fund, not summed
|
273 | ||
| 11 |
New Enterprise Associates 14, L.P.
13D
CIK 1544328 · Unknown · Aug 15, 2025
|
4 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.