Company: NCNA
Filing Date: 2025-07-09
Form Type: 6-K
Source: 0001193125-25-156987
Chunk: 0

Company: NuCana plc
Filing Date: 2025-07-09
Form: 6-K
Chunk 0
---
### 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): ☐

Other Events

As previously disclosed, on June 18, 2025, NuCana plc (the “Company”) received a written notice from the Listing Qualifications Department of
The Nasdaq Stock Market LLC (“Nasdaq”) notifying the Company that the bid price for of its American Depositary Shares (“ADSs”) had closed below the $1.00 per share minimum bid price threshold for continued listing on The Nasdaq
Capital Market, as set forth in Nasdaq Listing Rule 5550(a)(2) (the “Bid Price Requirement”), for the preceding 30 consecutive trading days. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company was granted a 180-calendar day period, through December 15, 2025, to regain compliance with the Bid Price Requirement.

On
July 8, 2025, the Company received a second written notice (the “Second Notice”) from Nasdaq stating that the bid price for the Company’s ADSs had closed below $0.10 per share for the 10 consecutive trading day period ended
July 7, 2025. Accordingly, the Company was notified that, in accordance with Nasdaq Listing Rule 5810(c)(3)(A)(iii), the Company was subject to delisting unless the Company timely requests a hearing