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ADCT S-3: Shelf registration

ADC Therapeutics SA

Filed with the SEC on · accession 0000950103-26-017177

ADCT filed a S-3 (shelf registration) with the SEC on Nov 10, 2026. ADC Therapeutics SA filed a Form S-3 registration statement to register 61,000,000 common shares for resale by selling shareholders, comprising 12,911,347 shares and 48,088,653 shares issuable upon exercise of pre-funded warrants issued under October 7, 2026 securities purchase agreements. The stock moved -9.6% by the first close after the filing.

Summary of the filing

ADC Therapeutics SA filed a Form S-3 registration statement to register 61,000,000 common shares for resale by selling shareholders, comprising 12,911,347 shares and 48,088,653 shares issuable upon exercise of pre-funded warrants issued under October 7, 2026 securities purchase agreements. The company will not receive proceeds from resales but may receive up to CHF 3,847,092 if the pre-funded warrants are exercised in cash.

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Key details

Aggregate common shares registered for resale by selling shareholders$61.0M
Common shares issued and sold to selling shareholders$12.9M
Common shares issuable upon exercise of pre-funded warrants$48.1M
Potential proceeds to company from cash exercise of pre-funded warrantsCHF 3.8M
RegistrantADC Therapeutics SA
Legal counselDavis Polk & Wardwell LLP
Legal counselHomburger AG

How ADCT stock reacted

Close before

$1.67

Nov 9, 2026

First close after

-9.58%

$1.51

5 trading days

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Since filing

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Frequently asked questions

What did ADCT file with the SEC on Nov 10, 2026?

ADCT filed a S-3 (Shelf registration). ADC Therapeutics SA filed a Form S-3 registration statement to register 61,000,000 common shares for resale by selling shareholders, comprising 12,911,347 shares and 48,088,653 shares issuable upon exercise of pre-funded warrants issued under October 7, 2026 securities purchase agreements. The company will not receive proceeds from resales but may receive up to CHF 3,847,092 if the pre-funded warrants are exercised in cash.

What does a shelf registration mean for ADCT stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a S-3?

Lets the company sell shares or debt later, quickly — a sign more shares may come. Check the maximum amount and compare it with the company’s size. A later "424B" filing shows an actual sale under the shelf.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A S-3 (shelf registration): Lets the company sell shares or debt later, quickly — a sign more shares may come.

How did ADCT stock react to this filing?

ADCT closed at $1.67 before the filing and $1.51 on Nov 10, 2026 (-9.58%).

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