Mineralys officer plans $11.7K stock sale Sept. 17

An officer of Mineralys Therapeutics filed a Rule 144 notice to sell 417 shares via cashless option exercise, following multiple prior stock sales in recent months.

Rhea-AI Filing Summary

Mineralys Therapeutics, Inc. (MLYS) received a Rule 144 notice from officer David Rodman covering the planned sale of 417 shares of common stock on September 17, 2026, through Merrill Lynch in a broker-assisted cashless exercise of employee stock options.

The notice also lists prior Rule 144 sales of Mineralys common stock by David Rodman over the past three months, including several block transactions between June 12, 2026 and September 14, 2026 with individual trades such as 14,058 shares for $387,716.51 on July 13, 2026.

Key Figures

Shares to be sold: 417 shares Aggregate market value of planned sale: $11,655.15 Sale on June 12, 2026: 6,349 shares for $151,901.37 +3 more

6 metrics

Shares to be sold 417 shares Planned Rule 144 sale of Mineralys Therapeutics common stock on September 17, 2026

Aggregate market value of planned sale $11,655.15 Value associated with 417 shares in the new Rule 144 notice

Sale on June 12, 2026 6,349 shares for $151,901.37 Common stock sale by David Rodman in the past three months table

Sale on June 15, 2026 9,890 shares for $235,487.24 Common stock sale by David Rodman in the past three months table

Sale on July 13, 2026 14,058 shares for $387,716.51 Common stock sale by David Rodman in the past three months table

Recent sale on September 14, 2026 7,709 shares for $216,931.26 Most recent transaction listed in the past three months section

Key Terms

Rule 144, cashless exercise, exercise of employee stock options, broker assisted

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

cashless exercise financial

"Broker assisted with cashless exercise"

A cashless exercise is a way for an option holder to convert stock options into actual shares without paying the purchase price in cash; instead they immediately give up a portion of the newly issued shares to cover the cost and any withholding taxes. Investors care because this process increases the number of shares available and can slightly dilute existing holdings, while also signaling how insiders or employees are realizing compensation without needing cash — similar to paying for a purchase by handing over part of what you just bought.

exercise of employee stock options financial

"Exercise of employee stock options"

broker assisted financial

"Broker assisted with cashless exercise"

FAQ

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

What does the Form 144 filing for MLYS disclose?

The filing discloses that officer David Rodman plans to sell 417 shares of Mineralys Therapeutics, Inc. common stock on September 17, 2026 under Rule 144, via a broker-assisted cashless exercise of employee stock options through Merrill Lynch.

How many MLYS shares are covered by the new planned Rule 144 sale?

The new planned sale covers 417 shares of Mineralys Therapeutics, Inc. common stock, with an aggregate market value stated as $11,655.15 and a proposed sale date of September 17, 2026 on NASDAQ through Merrill Lynch.

What prior Mineralys (MLYS) stock sales by David Rodman are listed in the past three months?

The notice lists multiple prior sales of Mineralys common stock, including 6,349 shares for $151,901.37 on June 12, 2026, 9,890 shares for $235,487.24 on June 15, 2026, and 14,058 shares for $387,716.51 on July 13, 2026, among other trades through September 14, 2026.

What was the largest single recent MLYS trade disclosed in the Form 144?

Among the listed transactions, one of the larger trades is on July 13, 2026, when 14,058 shares of Mineralys Therapeutics common stock were sold for $387,716.51 by David Rodman.

How is the new MLYS stock sale being executed according to the filing?

The new sale of 417 shares is described as an “Exercise of employee stock options” with a “Broker assisted with cashless exercise”, indicating that shares will be sold to cover costs associated with the option exercise.

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

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Available on EDGAR 09/17/2026 - 04:07 PM Accepted by SEC EDGAR 09/17/2026 - 04:06 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001672659
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Mineralys Therapeutics, Inc.
SEC File Number	001-41614
Address of Issuer	150 N. RADNOR CHESTER ROAD SUITE F200 RADNOR PENNSYLVANIA 19087
Phone	(888) 378-6240
Name of Person for Whose Account the Securities are To Be Sold	Rodman David Malcom
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common stock	Merrill Lynch 225 Liberty St Floor 37 New York NY 10281	417	11655.15	88406885	09/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	09/17/2026	Exercise of employee stock options	Mineralys Therapeutics, Inc.			417	09/17/2026	Broker assisted with cashless exercise

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	06/12/2026	6349	151901.37
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	06/15/2026	9890	235487.24
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	06/17/2026	4584	114600.00
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	07/09/2026	2171	65781.30
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	07/13/2026	14058	387716.51
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	07/15/2026	6349	168954.55
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	07/17/2026	416	11016.30
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	08/10/2026	2170	58785.30
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	08/13/2026	14056	372187.00
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	08/17/2026	417	10616.82
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	09/09/2026	2171	67018.77
David Rodman 150 N. RADNOR CHESTER RD SUITE F200 RADNOR PA 19087	Common Stock	09/14/2026	7709	216931.26

144: Remarks and Signature

Remarks
Date of Notice	09/17/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/29/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	David Rodman
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)