# EDGAR Filing Document

**Accession Number:** 0001771910
**File Stem:** 0000950103-26-005918
**Filing Date:** 2026-4
**Character Count:** 2015
**Document Hash:** a2466210acb4a0d9d08fdd68412ddad1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-26-005918.hdr.sgml**: 20260420

**ACCESSION NUMBER**: 0000950103-26-005918

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20260420

**DATE AS OF CHANGE**: 20260420

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ADC Therapeutics SA
- **CENTRAL INDEX KEY:** 0001771910
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39071
- **FILM NUMBER:** 26873497

**BUSINESS ADDRESS:**
- **STREET 1:** BIOPOLE
- **STREET 2:** ROUTE DE LA CORNICHE 3B
- **CITY:** EPALINGES
- **STATE:** V8
- **ZIP:** 1066
- **BUSINESS PHONE:** 41 21 653 02 00

**MAIL ADDRESS:**
- **STREET 1:** BIOPOLE
- **STREET 2:** ROUTE DE LA CORNICHE 3B
- **CITY:** EPALINGES
- **STATE:** V8
- **ZIP:** 1066

**UNITED STATES** **<br> SECURITIES AND EXCHANGE COMMISSION <br> Washington, D.C. 20549** 

**SCHEDULE 14A<br> Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934**

Filed by the registrant ☒<br> Filed by a party other than the Registrant ☐

Check the appropriate box:<br> ☐ Preliminary Proxy Statement<br> ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))<br> ☐ Definitive Proxy Statement<br> ☒ Definitive Additional Materials<br> ☐ Soliciting Material under § 240.14a-12

**ADC Therapeutics SA** ****<br> (Name of registrant as specified in its charter)<br> (Name of person(s) filing proxy statement, if other than the registrant)

Payment of Filing Fee (Check all boxes that apply):<br> ☒ No fee required<br> ☐ Fee paid previously with preliminary materials<br> ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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