Saurabh Saha - Jul 21, 2025 Form 4 Insider Report for Centessa Pharmaceuticals plc (CNTA)

Role
Chief Executive Officer, Director
Signature
/s/ Richard Menziuso, attorney-in-fact
Stock symbol
CNTA
Transactions as of
Jul 21, 2025
Transactions value $
-$663,850
Form type
4
Date filed
7/21/2025, 07:39 PM
Previous filing
Jun 20, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
SAHA SAURABH Chief Executive Officer, Director C/O CENTESSA PHARMACEUTICALS PLC, 3RD FL., 1 ASHLEY RD, ALTRINCHAM, CHESHIRE, UNITED KINGDOM /s/ Richard Menziuso, attorney-in-fact 2025-07-21 0001861926

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CNTA Ordinary Shares Options Exercise $212K +55K +24.88% $3.85 276K Jul 21, 2025 Direct F1
transaction CNTA Ordinary Shares Sale -$876K -55K -19.93% $15.92 221K Jul 21, 2025 Direct F1, F2, F3
holding CNTA Ordinary Shares 38K Jul 21, 2025 By trust F1, F4

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 -55K -26.83% $0.00 150K Jul 21, 2025 Ordinary Shares 55K $3.85 Direct F1, F5
* 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 May 16, 2024.
F3 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.80 to $16.05, 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 shares sold at each separate price within the range.
F4 These shares are held directly in a trust, for which the Reporting Person and his spouse serve as trustees.
F5 1/48th of the shares subject to such option shall vest and become exercisable in equal monthly installments with the first installment vesting on March 1, 2023.