Mineralys Therapeutics (MLYS) Rule 144: 3,000-share cashless exercise

Rhea-AI Filing Summary

Mineralys Therapeutics, Inc. reported a Rule 144 notice for the sale of 3,000 shares of Common Stock via a broker-assisted cashless exercise on 06/17/2026. The filing shows proceeds of $75,000 and identifies the seller as Daphne Karydas. The transaction is described as an exercise of employee stock options.

Insights

Securities Compliance Counsel

Rule 144 notice documents a cashless exercise and resale intent for 3,000 shares.

The filing lists a broker-assisted cashless exercise on 06/17/2026 that generated $75,000 for the reported 3,000 shares. It explicitly states the method as an exercise of employee stock options, which is a common compensation liquidity event.

Timing and distribution mechanics beyond the exercise are not detailed here; subsequent Form 4s or resale filings would show any open-market sales. Cash-flow treatment is as stated in the excerpt.

Key Figures

Shares reported: 3,000 shares Proceeds: $75,000 Transaction date: 06/17/2026 +2 more

5 metrics

Shares reported 3,000 shares Rule 144 notice, <date>06/17/2026</date>

Proceeds $75,000 Amount shown alongside the 3,000-share entry

Transaction date 06/17/2026 Date of broker-assisted cashless exercise

Method Broker-assisted cashless exercise Described as exercise of employee stock options

Prior sale in past 3 months 3,000 shares Entry dated <date>03/31/2026</date> in the filing

Key Terms

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

3 terms

Rule 144 regulatory

"Rule 144 notice for the sale of 3,000 shares via a broker-assisted cashless exercise"

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.

broker-assisted cashless exercise financial

"Broker assisted cashless exercise described for 3,000 shares on 06/17/2026"

exercise of employee stock options financial

"Exercise of employee stock options listed as the transaction type on 06/17/2026"

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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 Street Floor 37 New York NY 10281	3000	75000.00	82498101	06/17/2026	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	06/17/2026	Exercise of employee stock options	Mineralys Therapeutics, Inc.			3000	06/17/2026	Broker assisted 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
Daphne Karydas 150 N. RADNOR CHESTER RD. SUITE F200 RADNOR PA 19087	Common Stock	03/31/2026	3000	75000.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What did MLYS file on June 17, 2026?

The company submitted a Rule 144 notice reporting a broker-assisted cashless exercise of 3,000 shares on 06/17/2026, yielding $75,000 from the transaction.

Who is the selling party in the MLYS Rule 144 filing?

The filing identifies Daphne Karydas as the holder associated with the reported transaction and lists her address in Radnor, Pennsylvania.

What method was used to effect the transaction in the MLYS filing?

The transaction was described as a broker-assisted cashless exercise arising from the exercise of employee stock options, per the filing text dated 06/17/2026.

How many shares and proceeds are reported in the MLYS filing?

The notice reports 3,000 shares and proceeds of $75,000, both shown in the filing entries tied to 06/17/2026.

Does this Rule 144 filing alone show open-market sales of the shares?

No. The filing documents the exercise and intended sale mechanics; it does not specify subsequent open-market transactions or timing of any resale activity.