Security key
00653A107
Adaptimmune Therapeutics PLC - American Depositary Shares, each representing 6 Ordinary Shares (ADAPY)
CUSIP: 00653A107
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / American Depositary Shares, each representing 6 Ordinary Shares
- Total 13F shares
- 42,101,464
- Total 13F value
- $5,465,824
- Share change
- -73,468,751
- Put/Call ratio
- 104%
- SEC-reported price per share
- $0.13
- Number of holders
- 54
- Value change
- -$18,296,183
- Number of buys
- 20
- Number of sells
- 35
- Shares outstanding
- 1,571,428,571
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
54
Top holders
10
ADAPY full security history
Ownership snapshot
Full 13F holder table
Adaptimmune Therapeutics PLC SEC filings
Adaptimmune Therapeutics PLC company facts
Broader feeds
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
15/15
Latest evidence
15 Aug 2025
13D/G
3/4/5
13F
Lead comparable stake: 4.6%
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%.
15 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%
Long Focus Capital Management, LLC
1.5%
Two Seas Capital LP
1.4%
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
13F
10%+ Owner · Company
|
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 |
| Long Focus Capital Management, LLC |
13F
Company
|
1.5%
|
$5,694,478
23,756,687 shares
|
— | 30 Jun 2025 |
| Two Seas Capital LP |
13F
Company
|
1.4%
|
$5,412,594
22,580,701 shares
|
— | 30 Jun 2025 |
| NEA Management Company, LLC |
13F
Company
|
1.1%
|
$4,094,023
17,079,778 shares
|
— | 30 Jun 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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
54
Shares
42,101,464
Rows available
54
| 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 Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
62
Q3 2025 holders
54
Holder diff
-8
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|