CYTK files Form 144 to sell 3,639 RSUs

CYTK filing notifies a proposed sale of 3,639 Restricted Stock Units dated 03/06/2026.

Rhea-AI Filing Summary

CYTK filing notifies a proposed sale of 3,639 Restricted Stock Units dated 03/06/2026. The filing also lists multiple 10b5-1 dispositions by Andrew Callos between 01/02/2026 and 03/18/2026, including sales of 15,000 shares on 03/05/2026 and other dated transactions with reported proceeds.

Insights

Corporate Governance Analyst

Form 144 registers a small RSU sale and documents routine 10b5-1 dispositions.

The filing lists 3,639 Restricted Stock Units offered for sale on 03/06/2026 and shows multiple executed 10b5-1 sales by Andrew Callos from 01/02/2026 through 03/18/2026, with per‑trade proceeds reported.

These entries indicate pre‑arranged trading activity rather than ad hoc insider trading; subsequent filings or broker notices will confirm settlement and any remaining insider holdings.

Key Figures

RSUs registered: 3,639 shares Sale example: 15,000 shares Sale example: 11,000 shares +3 more

6 metrics

RSUs registered 3,639 shares Registered for sale on 03/06/2026

Sale example 15,000 shares Sold on 03/05/2026 with proceeds of $928,062.00

Sale example 11,000 shares Sold on 03/05/2026 with proceeds of $680,639.30

Sale example 1,930 shares Sold on 03/18/2026 with proceeds of $119,803.79

Sale example 8,542 shares Sold on 03/17/2026 with proceeds of $530,885.30

Sale example 2,582 shares Sold on 03/09/2026 with proceeds of $156,779.04

Key Terms

10b5-1, Restricted Stock Units, Form 144

3 terms

10b5-1 regulatory

"10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT"

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.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 3639 | 03/06/2026"

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.

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.

FAQ

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

What does CYTK's Form 144 disclose about the RSUs?

It discloses a proposed sale of 3,639 Restricted Stock Units dated 03/06/2026. The notice registers those RSUs for sale under Rule 144 according to the filing.

Who executed recent 10b5-1 sales listed in the CYTK filing?

The filing lists multiple 10b5-1 sales by Andrew Callos between 01/02/2026 and 03/18/2026. Each transaction includes share counts and reported proceeds.

How large were some reported 10b5-1 trades in the filing?

Examples include sales of 15,000 shares on 03/05/2026 with proceeds of $928,062.00 and another 11,000-share sale the same date with proceeds of $680,639.30.

Does the Form 144 show total proceeds or aggregate shares sold?

The filing lists per‑trade share counts and proceeds but does not provide an aggregate total. Review each transaction row for individual share counts and proceeds as reported.

Are the 10b5-1 sales in the filing pre‑arranged?

The entries are labeled as 10b5-1 Sales, indicating they were executed under a pre‑arranged trading plan; the filing lists trade dates, share counts, and proceeds for each transaction.

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

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Accepted by SEC EDGAR 03/31/2026 - 04:24 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	0001852129
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	ANDREW CALLOS
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	3639	229147.83	123162807	03/31/2026	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	03/06/2026	Restricted Stock Units	Issuer			3639	03/06/2026	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 ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/18/2026	1930	119803.79
ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/17/2026	8542	530885.30
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/16/2026	1709	104300.27
ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/09/2026	2582	156779.04
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/05/2026	15000	928062.00
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/05/2026	11000	680639.30
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/02/2026	886	54595.32
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	02/05/2026	15000	928927.50
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	02/02/2026	886	55020.60
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	01/05/2026	15000	904165.50
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	01/02/2026	885	55896.60
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	01/02/2026	913	56689.45

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 03/06/2026 through 03/14/2026.
Date of Notice	03/31/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/05/2025
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/ Andrew Callos
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)