AMEET MALLIK - 13 Feb 2026 Form 4 Insider Report for ADC Therapeutics SA (ADCT)

Role: Chief Executive Officer, Director
Signature: /s/ Lisa Kallebo, as Attorney-in-Fact for Ameet Mallik
Issuer symbol: ADCT
Transactions as of: 13 Feb 2026
Net transactions value: +$3,179,108
Form type: 4
Filing time: 18 Feb 2026, 17:39:54 UTC
Previous filing: 09 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MALLIK AMEET	Chief Executive Officer, Director	430 MOUNTAIN AVE, SUITE 404, NEW PROVIDENCE	/s/ Lisa Kallebo, as Attorney-in-Fact for Ameet Mallik	18 Feb 2026	0001861441

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ADCT	Common Shares	Award	$3,591,000	+900,000	+138%	$3.99	1,550,000	13 Feb 2026	Direct	F1, F2
transaction	ADCT	Common Shares	Tax liability	$411,892	-103,231	-6.7%	$3.99	1,446,769	13 Feb 2026	Direct	F3
holding	ADCT	Common Shares						669,101	13 Feb 2026	By grantor retained annuity trust	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents Common Shares to be delivered in settlement of a restricted share unit award which vests one-third on the first anniversary of the grant date, which grant date is February 13, 2026, and then one-third on each anniversary date thereafter, upon continued service through the designated vesting event.
F2	Balance reflects the prior transfer of 669,101 Common Shares from the Reporting Person to a grantor retained annuity trust, which transfer is exempt from Section 16(b) pursuant to Rule 16a-13. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.
F3	Represents the number of Common Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted share units previously granted.