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Mineralys Therapeutics, Inc.·4

Feb 20, 7:47 PM ET

Slingsby Brian Taylor 4

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Mineralys (MLYS) 10% Owner Brian Slingsby Receives RSUs

What Happened
Brian Taylor Slingsby, reported as a 10% owner of Mineralys Therapeutics (MLYS), received awards and recorded related transfers on Feb 19, 2026. The Form 4 shows a grant of 6,200 shares (price $0.00) and a grant of 8,300 derivative RSUs (price $0.00). The same day the filing also records corresponding "other acquisition or disposition" entries (code J) reflecting transfers of those instruments — consistent with movements between Slingsby and Catalys Pacific Fund, LP — all reported at $0.00.

Key Details

  • Transaction date: 2026-02-19; Form 4 filed 2026-02-20 (timely).
  • Reported items: 6,200 shares granted (A) at $0.00; 6,200 shares later recorded as transferred (J) and then re-acquired (J) same day. 8,300 derivative RSUs granted (A) at $0.00; 8,300 derivative RSUs recorded as transferred (J) and then re-acquired (J) same day.
  • Price/consideration: $0.00 for all reported transactions (no cash paid).
  • Shares owned after transaction: not specified in the provided excerpt of the filing.
  • Relevant footnotes:
    • F1: RSUs granted for no cash; each RSU converts to one share upon vesting in one annual installment after grant.
    • F2: Some transfers reflect an option/RSU transfer agreement between Slingsby and Catalys Pacific Fund, LP.
    • F3: Catalys Pacific Fund, LP holds certain securities; Slingsby may be deemed to have voting/investment power via related entities but disclaims beneficial ownership except for pecuniary interest.
    • F4: (If applicable) a stock option referenced vests in 12 monthly installments following grant.
  • No indication in the filing excerpt that the transactions were sales on the open market or taxable-withholding-related dispositions.

Context
These entries reflect award grants (RSUs/derivatives) and same‑day transfers between the reporting person and an affiliated investment vehicle (Catalys Pacific Fund), rather than market purchases or open‑market sales. RSU grants at $0 are common for employee or director compensation; as a 10% owner with related entities involved, some transfers may be administrative or structural (not an immediate market signal).