Tia L. Bush - 17 Nov 2025 Form 4 Insider Report for Centessa Pharmaceuticals plc (CNTA)

Signature
/s/ Raphael Deferiere, attorney-in-fact
Issuer symbol
CNTA
Transactions as of
17 Nov 2025
Net transactions value
-$743,200
Form type
4
Filing time
18 Nov 2025, 16:17:11 UTC
Previous filing
13 Nov 2025
Next filing
03 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Bush Tia L Chief Technology & Quality Ofc C/O CENTESSA PHARMACEUTICALS PLC, 3RD FL., 1 ASHLEY RD, ALTRINCHAM, CHESHIRE, UNITED KINGDOM /s/ Raphael Deferiere, attorney-in-fact 18 Nov 2025 0001863418

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CNTA Ordinary Shares Options Exercise $376,800 +40,000 +33% $9.42 161,503 17 Nov 2025 Direct F1
transaction CNTA Ordinary Shares Sale $1,120,000 -40,000 -25% $28.00 121,503 17 Nov 2025 Direct F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CNTA Share Option (right to buy) Options Exercise $0 -40,000 -10% $0.000000 360,338 17 Nov 2025 Ordinary Shares 40,000 $9.42 Direct F1, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.
F2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 14, 2024.
F3 25% of the shares subject to such option shall vest and become exercisable on May 20, 2022 and the remaining 75% of the shares subject to such option shall vest and become exercisable in 36 monthly installments on the first day of each month thereafter.