Jeffrey D. Bloss - 19 Jun 2026 Form 4 Insider Report for NuCana plc (NCNA)

Reporting relationship: Chief Medical Officer
Issuer ticker: NCNA
Reported as of: 19 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 23 Jun 2026, 18:54:26 UTC
Prior SEC filing: 19 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Ian Webster, Attorney-in-Fact for Jeffrey D. Bloss

Key filing fact

Jeffrey D. Bloss filed Form 4 for NuCana plc (NCNA) on 23 Jun 2026.

Key facts

This page summarizes Jeffrey D. Bloss's Form 4 filing for NuCana plc (NCNA).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 23 Jun 2026, 18:54.

Change

Previous filing in this sequence was filed on 19 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001807569 Primary reporting owner

Bloss Jeffrey D.

Relationship: Chief Medical Officer
Address: C/O NUCANA PLC, 3 LOCHSIDE WAY, EDINBURGH, UNITED KINGDOM
Signature: /s/ Ian Webster, Attorney-in-Fact for Jeffrey D. Bloss
Signature date: 23 Jun 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NCNA transaction Derivative

Options

Disposed to Issuer

Transaction value
Shares: -36,539,720
Change %: -25%
Price: $0.000000^*
Shares after: 109,619,160
Date: 19 Jun 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 36,539,720
Exercise price
Footnotes: F1, F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

D - Partial cancelation of vested options.

Footnote F2

The ordinary shares, nominal value 0.000004 Pounds Sterling per share (the "Ordinary Shares"), of NuCana plc (the "Company") underlying these options being canceled were part of a grant of 146,158,880 options that vested as to 25% on June 20, 2026, and had an exercise price of 0.0004 Pounds Sterling per share, with the remaining 109,619,160 to vest in three equal annual installments thereafter, subject to the Reporting Persons's continued service with the Company through the applicable vesting date.

Footnote F3

The remaining options will expire on June 20, 2035.

Footnote F4

The option was canceled by mutual agreement of the Reporting Person and the Company. The Reporting Person did not receive consideration for the cancellation.