Mineralys (MLYS) CEO sells 13,548 and 1,552 shares under plan

Mineralys Therapeutics (MLYS) disclosed insider sales by its Chief Executive Officer and director on 10/13/2025.

Accepted by SEC EDGAR 10/15/2025 - 12:00 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Mineralys Therapeutics (MLYS) disclosed insider sales by its Chief Executive Officer and director on 10/13/2025. The CEO sold 13,548 shares at a weighted-average price of $42.6295 (range $41.9800–$42.9800) and 1,552 shares at a weighted-average price of $43.0299 (range $42.9822–$43.2030) pursuant to a Rule 10b5-1 trading plan adopted on January 30, 2024. Following these transactions, the reporting person directly beneficially owned 831,305 shares.

Insider Trade Summary

Net Seller: 15,100 shares

Net Sell 2 txns

Insider Congleton Jon

Role Chief Executive Officer

Sold 15,100 shs ($644K)

Share of Position Sold 1.8%

Type	Security	Shares	Price	Value
Sale	Common Stock	13,548	$42.6295	$578K
Sale	Common Stock	1,552	$43.0299	$67K

Holdings After Transaction: Common Stock — 831,305 shares (Direct)

Holdings Before and After: Common Stock, 846,405 to 831,305 shares (Direct)

Other Insiders: 1 other insider reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (3)

1. F1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 30, 2024.
2. F2. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $41.9800 to $42.9800. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.
3. F3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $42.9822 to $43.2030. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MLYS report?

The CEO and director sold 13,548 shares and 1,552 shares on 10/13/2025.

At what prices were MLYS shares sold by the CEO?

Weighted-average prices were $42.6295 (range $41.9800–$42.9800) and $43.0299 (range $42.9822–$43.2030).

Was the MLYS CEO’s sale under a 10b5-1 plan?

Yes. The transactions were effected under a Rule 10b5-1 trading plan adopted on January 30, 2024.

How many MLYS shares does the CEO own after the sale?

Following the transactions, the CEO directly beneficially owned 831,305 shares.

What roles does the reporting person hold at MLYS?

The reporting person is both a Director and the Chief Executive Officer.

How were the sales executed across prices?

They were executed in multiple transactions within the disclosed price ranges, reported as weighted averages.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Congleton Jon

(Last) (First) (Middle)

150 N. RADNOR CHESTER ROAD,

SUITE F200

(Street)

RADNOR PA 19087

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mineralys Therapeutics, Inc. [ MLYS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/13/2025		S(1)		13,548	D	$42.6295(2)	832,857	D
Common Stock	10/13/2025		S(1)		1,552	D	$43.0299(3)	831,305	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 30, 2024.

2. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $41.9800 to $42.9800. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.

3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $42.9822 to $43.2030. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.

Remarks:

	/s/ Adam Levy, Attorney-in-fact	10/15/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.