Slingsby Brian Taylor 4
4 · Mineralys Therapeutics, Inc. · Filed Feb 20, 2026
Research Summary
AI-generated summary of this filing
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).
Insider Transaction Report
- Award
Common Stock
[F1]2026-02-19+6,200→ 6,200 total - Other
Common Stock
[F2][F1]2026-02-19−6,200→ 0 total - Other
Common Stock
[F2][F1][F3]2026-02-19+6,200→ 7,910,038 total(indirect: See footnote) - Award
Stock Option
[F4]2026-02-19+8,300→ 8,300 totalExercise: $28.06Exp: 2036-02-19→ Common Stock (8,300 underlying) - Other
Stock Option
[F2][F4]2026-02-19−8,300→ 0 totalExercise: $28.06Exp: 2036-02-19→ Common Stock (8,300 underlying) - Other
Stock Option
[F2][F4][F3]2026-02-19+8,300→ 8,300 total(indirect: See footnote)Exercise: $28.06Exp: 2036-02-19→ Common Stock (8,300 underlying)
Footnotes (4)
- [F1]Restricted Stock Units (RSUs) are granted to the reporting person for no additional cash consideration, each of which represents a contingent right to receive one share of common stock upon vesting of these RSUs in one annual installment following the date of grant.
- [F2]Represents stock options or RSUs transferred pursuant to an option transfer agreement between the Reporting Person and Catalys Pacific Fund, LP.
- [F3]Represents securities held directly by Catalys Pacific Fund, LP. The general partner of Catalys Pacific Fund, LP is Catalys Pacific Fund GP, LP. Brian Taylor Slingsby is the managing partner of Catalys Pacific, LLC, the general partner of the General Partner. Catalys Pacific, LLC, Catalys Pacific Fund GP, LP and Brian Taylor Slingsby may be deemed to have voting and investment power over the shares held of record by Catalys Pacific Fund, LP. Each of Catalys Pacific, LLC, Catalys Pacific Fund GP, LP and Brian Taylor Slingsby disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.
- [F4]The stock option vests in 12 substantially equal monthly installments following the date of grant.