CYTK (NASDAQ) insider sale notice: 38,730 shares proposed on 06/24/2026

Rhea-AI Filing Summary

CYTK filed a Form 144 notice covering the proposed sale of 38,730 shares of common stock on 06/24/2026 following an exercise of stock options, with cash proceeds. The filing lists broker/dealer Morgan Stanley Smith Barney LLC and reports prior 10b5-1 sales of 23,906 shares on 05/05/2026 for $1,837,766.45.

Insights

Securities Counsel

Form 144 notifies regulators of a planned resale after option exercise.

Form 144 records a proposed resale of 38,730 shares on 06/24/2026 tied to an exercise of stock options. The broker/dealer is Morgan Stanley Smith Barney LLC. The filing also discloses prior 10b5-1 sales on 05/05/2026.

Timing and cash‑flow mechanics are presented as sale proceeds in cash; other transaction details and any restrictions are not listed in the excerpt.

Key Figures

Proposed shares to be sold: 38,730 shares Prior 10b5-1 shares sold: 23,906 shares Proceeds from prior sales: $1,837,766.45 +2 more

5 metrics

Proposed shares to be sold 38,730 shares proposed resale on <date>06/24/2026</date> after option exercise

Prior 10b5-1 shares sold 23,906 shares sale on <date>05/05/2026</date>

Proceeds from prior sales $1,837,766.45 proceeds reported for 05/05/2026 10b5-1 sale

Amount listed near issuer line $3,098,787.30 figure appearing with issuer/broker line in excerpt

Reported share count field 124,432,565 numeric field shown in excerpt (context not explicitly labeled)

Key Terms

Form 144, 10b5-1, Exercise of Stock Options

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 regulatory

"10b5-1 Sales for SUNG LEE ... 05/05/2026"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Securities To Be Sold | Exercise of Stock Options"

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Available on EDGAR 06/24/2026 - 04:38 PM Accepted by SEC EDGAR 06/24/2026 - 04:37 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
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	38730	3098787.30	124432565	06/24/2026	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	06/24/2026	Exercise of Stock Options	Issuer			38730	06/24/2026	Cash

* 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
10b5-1 Sales for SUNG LEE 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	05/05/2026	23906	1837766.45

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 does the CYTK Form 144 disclose about the planned sale?

The Form 144 discloses a proposed resale of 38,730 common shares on 06/24/2026 following an exercise of stock options. It names Morgan Stanley Smith Barney LLC as the broker/dealer handling the transaction.

Were there prior insider sales reported for CYTK in the excerpt?

Yes. The excerpt reports prior 10b5-1 sales of 23,906 shares on 05/05/2026 that generated $1,837,766.45. Those prior sales are listed separately from the proposed June resale.

Is the planned CYTK sale cash or noncash consideration?

The excerpt states the June transaction follows an exercise of stock options and lists the consideration as Cash. No further use‑of‑proceeds or recipient breakdown is provided in the excerpt.

Which broker/dealer is handling the proposed CYTK resale?

The filing names Morgan Stanley Smith Barney LLC (New York Plaza address) as the broker/dealer associated with the proposed sale of 38,730 shares on 06/24/2026.