EcoR1 Capital, LLC - 28 Jul 2025 Form 4 Insider Report for Adaptimmune Therapeutics PLC (ADAP)

Role
10%+ Owner
Signature
/s/ Oleg Nodelman
Issuer symbol
ADAP
Transactions as of
28 Jul 2025
Net transactions value
-$6,890,236
Form type
4
Filing time
30 Jul 2025, 18:20:32 UTC
Previous filing
27 Jun 2025
Next filing
08 Jan 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
EcoR1 Capital, LLC 10%+ Owner 357 TEHAMA STREET #3, SAN FRANCISCO /s/ Oleg Nodelman 30 Jul 2025 0001587114

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ADAP Ordinary Shares Sale $3,817,321 -33,931,740 -21% $0.1125 130,492,680 28 Jul 2025 See Note F1, F2, F3, F4, F5
transaction ADAP Ordinary Shares Sale $271,971 -2,687,460 -2.1% $0.1012 127,805,220 29 Jul 2025 See Note F1, F2, F6, F7, F8
transaction ADAP Ordinary Shares Sale $2,800,944 -27,433,338 -21% $0.1021 100,371,882 30 Jul 2025 See Note F1, F2, F7, F9, F10
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

EcoR1 Capital, LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 These Ordinary Shares are held through American Depositary Shares ("ADS") of the Issuer. Each ADS represents 6 Ordinary Shares.
F2 The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.
F3 The reporting persons sold 5,655,290 ADSs representing 33,931,740 Ordinary Shares. Qualified Fund sold 5,281,476 of those ADSs, representing 31,688,856 Ordinary Shares.
F4 The price reported in Column 4 is the price per ADS sold by the reporting persons. This price is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.1086 to $0.1184, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of ADSs sold at each separate price within the ranges set forth in this footnote.
F5 After this transaction, the reporting persons beneficially owned 21,748,780 ADSs, including 20,569,634 ADS held by Qualified Fund representing 123,417,804 Ordinary Shares.
F6 The reporting persons sold 447,910 ADSs representing 2,687,460 Ordinary Shares. Qualified Fund sold 418,303 of those ADSs, representing 2,509,818 Ordinary Shares.
F7 The price reported in Column 4 is the price per ADS sold by the reporting persons.
F8 After this transaction, the reporting persons beneficially owned 21,300,870 ADSs, including 20,151,331 ADSs held by Qualified Fund representing 120,907,986 Ordinary Shares.
F9 The reporting persons sold 4,572,223 ADSs representing 27,433,338 Ordinary Shares. Qualified Fund sold 4,270,000 of those ADSs, representing 25,620,000 Ordinary Shares.
F10 After this transaction, the reporting persons beneficially owned 16,728,647 ADSs, including 15,881,331 ADSs held by Qualified Fund representing 95,287,986 Ordinary Shares.