NuCana 6-K details complete warrant cancellation after ATM execution

Rhea-AI Filing Summary

Key event: On 21 Jul 2025 NuCana plc (NCNA) filed a Form 6-K reporting the cancellation of all outstanding Series A American Depositary Share purchase warrants. The move follows completion of a strategic at-the-market (ATM) execution.

The filing contains no financial statements, earnings metrics or additional material events. A press release with further details is provided as Exhibit 99.1 and incorporated by reference. The report was signed by Interim CFO Ian Webster.

• Form type: 6-K (foreign issuer current report)
• Purpose: disclose warrant cancellation
• Exhibit: 99.1 – press release dated 21 Jul 2025

No additional information on revenue, guidance, debt, litigation or operational performance was disclosed.

Insights

Financial Analyst

TL;DR: Warrant cancellation removes potential dilution and signals tighter capital control; disclosure is limited, so impact appears mildly positive.

Eliminating all Series A ADS purchase warrants reduces the future share overhang that could be exercised below market, a constructive step for existing shareholders after the recent ATM financing. Although the filing omits warrant volume, strike price and cash impact, the action generally strengthens equity structure and may ease valuation pressure. Absence of any operational or financial update limits the market significance, yet governance optics are favorable.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2025

(Commission File No. 001-38215)

NUCANA PLC

(Translation of registrant’s name into English)

3 Lochside Way

Edinburgh EH12 9DT

United Kingdom

(Address of registrant’s principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7): ☐

NuCana plc announces warrant cancellation

On July 21, 2025, NuCana plc announced the cancellation of all outstanding Series A ADS Purchase Warrants following a strategic ATM execution. Further information is included in the press release attached as Exhibit 99.1 hereto, which is incorporated by reference herein.

Exhibits

Exhibit		Description
99.1		Press Release dated July 21, 2025

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

NuCana plc
By:		/s/ Ian Webster
Name:		Ian Webster
Title:		Interim Chief Financial Officer

Date: July 21, 2025