Security key
00653A107
Adaptimmune Therapeutics PLC - American Depositary Shares, each representing 6 Ordinary Shares (ADAPY)
CUSIP: 00653A107
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / American Depositary Shares, each representing 6 Ordinary Shares
- Total 13F shares
- 3,661
- Total 13F value
- $72
- Share change
- -1,607,791
- SEC-reported price per share
- $0.02
- Number of holders
- 1
- Value change
- -$41,802
- Number of sells
- 5
- Shares outstanding
- 1,571,428,571
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
1
Top holders
1
ADAPY full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Adaptimmune Therapeutics PLC SEC filings
Adaptimmune Therapeutics PLC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 00653A107
Recent filing periods:
Ownership snapshot
Top reported holders of ADAPY - Adaptimmune Therapeutics PLC - American Depositary Shares, each representing 6 Ordinary Shares (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BAILLIE GIFFORD & CO
Disclosed value leader
BAILLIE GIFFORD & CO
Comparable rows
10/15
Latest evidence
31 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 4.6%
5 rows are not safely comparable across share classes.
13D/G row: BAILLIE GIFFORD & CO
Showing 1-6 of 15 holder rows.
Quick read
BAILLIE GIFFORD & CO leads the comparable SEC ownership view at 4.6%.
10 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BAILLIE GIFFORD & CO's linked filing trail.
Comparable ownership
Top 5
BAILLIE GIFFORD & CO
4.6%
EcoR1 Capital, LLC
4.2%
New Enterprise Associates 14, L.P.
0%
Empirical Finance, LLC
0.05%
Rathbones Group PLC
0.03%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BAILLIE GIFFORD & CO |
13D/G
|
4.6%
|
$19,146,934
70,914,570 shares
|
$0 | 31 Dec 2024 |
| EcoR1 Capital, LLC |
3/4/5
13D/G
10%+ Owner
|
4.2%
from 13D/G
|
$10,247,969
100,371,882 shares
|
— | 28 Jul 2025 |
| New Enterprise Associates 14, L.P. |
13D/G
|
0%
|
$0.4
4 shares
|
$0 | 15 Aug 2025 |
| Empirical Finance, LLC |
13F
Company
|
0.05%
|
$20,800
800,000 shares
|
— | 31 Dec 2025 |
| Rathbones Group PLC |
13F
Company
|
0.03%
|
$11,253
432,818 shares
|
— | 31 Dec 2025 |
| XTX Topco Ltd |
13F
Company
|
0.02%
|
$9,200
353,836 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1
Shares
3,661
Rows available
1
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
1
Q1 2026 holders
1
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend