Matthew T. Wiley - 25 Jun 2026 Form 4 Insider Report for Definium Therapeutics, Inc. (DFTX)

Reporting relationship: Chief Commercial Officer
Issuer ticker: DFTX
Reported as of: 25 Jun 2026
Net transaction value: -$129,101
SEC form: 4
Accepted by SEC: 26 Jun 2026, 16:30:03 UTC
Prior SEC filing: 22 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/Mark Sullivan, Attorney-in-Fact for Matthew T. Wiley

Key filing fact

Matthew T. Wiley filed Form 4 for Definium Therapeutics, Inc. (DFTX) on 26 Jun 2026.

Key facts

This page summarizes Matthew T. Wiley's Form 4 filing for Definium Therapeutics, Inc. (DFTX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 26 Jun 2026, 16:30.

Change

Previous filing in this sequence was filed on 22 Jun 2026.
Current net transaction value: -$129,101.

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 0001759703 Primary reporting owner

Wiley Matthew T.

Relationship: Chief Commercial Officer
Address: C/O DEFINIUM THERAPEUTICS, INC., ONE WORLD TRADE CENTER, SUITE 8500, NEW YORK
Signature: /s/Mark Sullivan, Attorney-in-Fact for Matthew T. Wiley
Signature date: 26 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DFTX transaction

Common Shares

Sale

Transaction value: $129,101
Shares: -2,867
Change %: -1.6%
Price: $45.03
Shares after: 174,633
Date: 25 Jun 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

Represents the number of Common Shares sold to satisfy withholding tax obligations in connection with the settlement of vested restricted stock units, pursuant to sell-to-cover elections under a Rule 10b5-1 plan adopted on May 29, 2025.