CYTOKINETICS (CYTK) Form 144 Notice — 6,695 Shares Planned Sale

Rhea-AI Filing Summary

CYTOKINETICS, INC. (CYTK) Form 144 notice reports a proposed sale of 6,695 common shares valued at $360,793.55, to be sold through Morgan Stanley Smith Barney on 09/30/2025 on NASDAQ. The shares were acquired as restricted stock units on 10/01/2021 from the issuer and payment was recorded as N/A. The filing also discloses recent 10b5-1 sales by the reported person: 6,756 shares sold on 09/02/2025 for $337,800.00. The filer affirms no undisclosed material adverse information and references Rule 10b5-1 trading plan requirements.

Positive

• Proper disclosure of proposed sale under Rule 144 with broker, share count, value, and planned sale date
• Origin of shares identified as restricted stock units acquired 10/01/2021, showing provenance of holdings
• Recent 10b5-1 sale disclosed (6,756 shares on 09/02/2025 for $337,800.00), indicating consistent reporting

Negative

• Insider selling activity totaling ~13,451 shares disclosed across planned and recent sales, which could be interpreted negatively by some investors
• No information provided on the proportion of insider holdings remaining or relationship of the seller to the issuer beyond the form text

Insights

Securities Analyst

TL;DR: Insider intends to sell ~6.7k shares (~$361k) via broker; recent 10b5-1 sales of similar size occurred earlier in September.

This Form 144 documents a proposed sale under Rule 144 of 6,695 common shares acquired as RSUs on 10/01/2021, to be executed through Morgan Stanley Smith Barney on NASDAQ on 09/30/2025, with an aggregate market value of $360,793.55. The filing also reports a 10b5-1 sale of 6,756 shares on 09/02/2025 producing $337,800.00. From a trading-flow perspective, these are modest insider disposals relative to typical market-cap dynamics; the filing shows procedural compliance but does not include any financial performance metrics.

Corporate Governance Expert

TL;DR: Filing indicates compliance with disclosure and 10b5-1 representation; repeated insider sales are documented but no governance breaches are stated.

The notice contains the required attestation that the seller is unaware of undisclosed material adverse information and cites Rule 10b5-1 plan adoption language. It identifies the broker and the origin of the shares as issuer-granted restricted stock units from 10/01/2021. The document does not allege any regulatory issues or governance actions; it is a routine insider sale disclosure for investor transparency.

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	6695	360793.55	119657156	09/30/2025	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	10/01/2021	Restricted Stock Units	Issuer			6695	10/01/2021	N/A

* 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 EDWARD KAYE 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	09/02/2025	6756	337800.00

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 does the Form 144 for CYTK disclose about the proposed sale?

The filing discloses a proposed sale of 6,695 common shares valued at $360,793.55 to be executed on 09/30/2025 through Morgan Stanley Smith Barney on NASDAQ.

How were the shares being sold by CYTK acquired?

The shares were acquired as Restricted Stock Units (RSUs) from the issuer on 10/01/2021.

Has the filer sold any CYTK shares recently?

Yes. The filing reports a 10b5-1 sale of 6,756 shares on 09/02/2025 for $337,800.00.

Who is the broker handling the proposed sale?

The proposed sale is to be handled by Morgan Stanley Smith Barney LLC Executive Financial Services at the New York address listed in the filing.

Does the filer state any undisclosed material information?

By signing the notice, the person represents they do not know any material adverse information not publicly disclosed regarding the issuer.

Are the shares being sold part of a trading plan?

The filing references Rule 10b5-1 language and discloses a prior 10b5-1 sale, but it does not explicitly state the adoption date of a trading plan in the provided content.