Insider files to sell 23,906 Common shares

Insider filing to sell Common stock.

Rhea-AI Filing Summary

Insider filing to sell Common stock. The Form 144 lists 23,906 Common shares tied to restricted stock units and performance stock units dated 12/03/2024. The filing records a prior sale of 4,935 shares on 03/17/2026 for $306,710.25. The broker shown is Morgan Stanley Smith Barney LLC.

Insights

Compliance Counsel

Form 144 notifies the market of an intended sale of issuer stock by an affiliate.

Form 144 is a notice of proposed sale under securities rules. This filing lists 23,906 Common shares to be sold that are associated with restricted stock units and performance stock units dated 12/03/2024, and shows a past sale of 4,935 shares on 03/17/2026 for $306,710.25. The broker identified is Morgan Stanley Smith Barney LLC.

The filing itself is administrative and does not state timing or whether sales will proceed. Subsequent SEC filings (or trade reporting) would show executed transactions and exact proceeds.

Key Figures

Proposed shares to be sold: 23,906 shares Prior sale reported: 4,935 shares Proceeds from prior sale: $306,710.25 +2 more

5 metrics

Proposed shares to be sold 23,906 shares linked to restricted stock units and performance stock units dated 12/03/2024

Prior sale reported 4,935 shares sold on 03/17/2026

Proceeds from prior sale $306,710.25 gross amount reported for 4,935-share sale on 03/17/2026

Broker Morgan Stanley Smith Barney LLC listed as broker at 1 New York Plaza, 8th Floor, New York, NY

Award date 12/03/2024 date associated with restricted and performance stock units

Key Terms

restricted stock units, performance stock units, Form 144

3 terms

restricted stock units financial

"Restricted stock units and performance stock units dated 12/03/2024"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

performance stock units financial

"Restricted stock units and performance stock units dated 12/03/2024"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

Form 144 regulatory

"Securities Sold During The Past 3 Months ... 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.

FAQ

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

What does the CYTK Form 144 disclose?

The Form 144 discloses a proposed sale of 23,906 Common shares tied to restricted and performance stock units dated 12/03/2024. It also reports a prior sale of 4,935 shares on 03/17/2026 for $306,710.25.

Who is the broker named on the Form 144 for CYTK?

The filing names Morgan Stanley Smith Barney LLC as the broker. The address shown is 1 New York Plaza, 8th Floor, New York, NY 10004, indicating the broker handling the proposed resale activity.

Are the shares being sold from grants or vested awards?

The shares are linked to restricted stock units and performance stock units dated 12/03/2024, indicating the sale relates to equity awards rather than open-market purchases or new issuance.

What prior sales are reported in this Form 144?

The Form 144 reports a sale of 4,935 shares on 03/17/2026 with gross proceeds of $306,710.25. This sale is listed under "Securities Sold During The Past 3 Months."

Does the Form 144 state when the 23,906 shares will be sold?

The filing lists the 23,906 shares as the quantity to be sold but does not specify execution dates or timing for those sales within the disclosed excerpt.

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

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Accepted by SEC EDGAR 05/05/2026 - 04:31 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	0001793200
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	CYTOKINETICS, INCORPORATED
SEC File Number	000-50633
Address of Issuer	350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	6506243000
Name of Person for Whose Account the Securities are To Be Sold	SUNG LEE
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	23906	1578991.30	123162807	05/05/2026	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	12/03/2024	Restricted stock units and performance stock units	Issuer			23906	12/03/2024	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
SUNG LEE 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/17/2026	4935	306710.25

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period of 12/03/2024 and 03/15/2026.
Date of Notice	05/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/23/2025
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	/s/ Sung Lee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)