Definium Therapeutics, Inc.·4

Jun 26, 4:30 PM ET

Barrow Robert 4

4 · Definium Therapeutics, Inc. · Filed Jun 26, 2026

Research Summary

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Definium Therapeutics CEO Robert Barrow Sells 29,208 Shares

What Happened Robert Barrow, CEO of Definium Therapeutics (DFTX), reported a sale of 29,208 common shares on June 25, 2026 at $45.03 per share, totaling $1,315,236. The transaction is reported as a sale (S) and was executed to satisfy tax withholding obligations associated with the settlement of vested restricted stock units (RSUs).

Key Details

  • Transaction date: 2026-06-25
  • Price per share: $45.03; Total value: $1,315,236
  • Transaction type: Sale (S) — reported as open market/private sale
  • Footnote: Sale used to satisfy withholding tax on vested RSUs pursuant to sell-to-cover elections under a Rule 10b5-1 plan adopted June 15, 2022 (Footnote F1)
  • Shares owned after transaction: Not specified in the provided filing
  • Filing date: 2026-06-26 (reported promptly; no late filing indicated)

Context Sell-to-cover transactions are routine when RSUs vest: a portion of shares is sold to cover tax withholding rather than representing a discretionary cash sale by the insider. Such sales are common and are not, by themselves, clear signals of the insider’s view on the company’s prospects.

Insider Transaction Report

Form 4
Period: 2026-06-25
Barrow Robert
DirectorChief Executive Officer
Transactions
  • Sale

    Common Shares

    [F1]
    2026-06-25$45.03/sh29,208$1,315,2361,098,246 total
Footnotes (1)
  • [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 June 15, 2022.
Signature
/s/ Mark Sullivan, Attorney-in-Fact for Robert Barrow|2026-06-26

Documents

1 file
  • 4
    ownership.xmlPrimary

    4