Brian Taylor Slingsby - 19 Feb 2026 Form 4 Insider Report for Mineralys Therapeutics, Inc. (MLYS)

Role
Director, 10%+ Owner
Signature
Catalys Pacific Fund, LP, By: Catalys Pacific Fund GP, LP, its General Partner, By: Catalys Pacific, LLC, its General Partner, By: Brian Taylor Slingsby, its Managing Partner, By: /s/ Adam Levy, Attorney-in-fact
Issuer symbol
MLYS
Transactions as of
19 Feb 2026
Net transactions value
$0
Form type
4
Filing time
20 Feb 2026, 19:47:18 UTC
Previous filing
21 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Slingsby Brian Taylor Director, 10%+ Owner 1700 WESTLAKE AVE. N, SUITE 200, THINKSPACE, SEATTLE Catalys Pacific Fund, LP, By: Catalys Pacific Fund GP, LP, its General Partner, By: Catalys Pacific, LLC, its General Partner, By: Brian Taylor Slingsby, its Managing Partner, By: /s/ Adam Levy, Attorney-in-fact 20 Feb 2026 0001963901

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MLYS Common Stock Award $0 +6,200 $0.000000 6,200 19 Feb 2026 Direct F1
transaction MLYS Common Stock Other $0 -6,200 -100% $0.000000 0 19 Feb 2026 Direct F1, F2
transaction MLYS Common Stock Other $0 +6,200 +0.08% $0.000000 7,910,038 19 Feb 2026 See footnote F1, F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MLYS Stock Option Award $0 +8,300 $0.000000 8,300 19 Feb 2026 Common Stock 8,300 $28.06 Direct F4
transaction MLYS Stock Option Other $0 -8,300 -100% $0.000000 0 19 Feb 2026 Common Stock 8,300 $28.06 Direct F2, F4
transaction MLYS Stock Option Other $0 +8,300 $0.000000 8,300 19 Feb 2026 Common Stock 8,300 $28.06 See footnote F2, F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.