Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Adaptimmune Therapeutics PLC

CIK 0001621227ADAPY· quarter ending 2026-06-30
Shares outstanding
1,590,309,546
Held by 13F filers
0
share count unavailable
Holders
0
+0 vs 2026-03-31 · 0 new, 0 exited
Value
$0
shares +— vs prior quarter

Share classes (cover page of the 10-Q filed 2025-08-13, as of 2025-08-11)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockADAP · NASDAQ1,590,309,546——

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 1 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (0 of 0 · )

change vs 2026-03-31

No 13F holders for the selected CUSIPs this quarter.

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
JOHN HELMERSSCHEDULE 13G2026-02-172025-12-3100%
LONG FOCUS CAPITAL MANAGEMENT, LLCSCHEDULE 13G2026-02-172025-12-3100%
Two Seas Capital LPSCHEDULE 13G/A2025-11-142025-09-3000%
Two Seas Capital GP LLCSCHEDULE 13G/A2025-11-142025-09-3000%
Sina ToussiSCHEDULE 13G/A2025-11-142025-09-3000%
Mohamad H. MakhzoumiSCHEDULE 13D/A2025-08-192025-08-1540%
New Enterprise Associates 16, L.P.SCHEDULE 13D/A2025-08-192025-08-1540%
Scott D. SandellSCHEDULE 13D/A2025-08-192025-08-1540%
EcoR1 Capital, LLCSCHEDULE 13G/A2025-08-192025-08-1566,000,0004.2%
EcoR1 Capital Fund Qualified, L.P.SCHEDULE 13G/A2025-08-192025-08-1563,184,6504%
Patrick J. KerinsSCHEDULE 13D/A2025-08-192025-08-1540%
Oleg NodelmanSCHEDULE 13G/A2025-08-192025-08-1566,000,0004.2%
Anthony A. Florence, Jr.SCHEDULE 13D/A2025-08-192025-08-1540%
NEA 14 GP, LTDSCHEDULE 13D/A2025-08-192025-08-1540%
NEA 16 GP, LLCSCHEDULE 13D/A2025-08-192025-08-1540%
NEA Partners 14, L.P.SCHEDULE 13D/A2025-08-192025-08-1540%
NEA Partners 16, L.P.SCHEDULE 13D/A2025-08-192025-08-1540%
New Enterprise Associates 14, L.P.SCHEDULE 13D/A2025-08-192025-08-1540%
Forest BaskettSCHEDULE 13D/A2025-08-192025-08-1540%
BAILLIE GIFFORD & COSCHEDULE 13G/A2025-02-122024-12-3170,914,5704.6%
LONG FOCUS CAPITAL MASTER, LTD.SCHEDULE 13G/A2025-02-112024-12-3113,354,8585.2%
GLENN HELMERSSCHEDULE 13G/A2025-02-112024-12-317,139,5352.8%
CONDAGUA, LLCSCHEDULE 13G/A2025-02-112024-12-317,139,5352.8%
Matrix Capital Management Company LPSCHEDULE 13G/A2025-01-082024-12-3100%
David E. GoelSCHEDULE 13G/A2025-01-082024-12-3100%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.