Form 144: Andrew Callos proposes sale of 72,190 shares

Andrew Callos reported proposed sales of Common Stock via a Form 144.

Rhea-AI Filing Summary

Andrew Callos reported proposed sales of Common Stock via a Form 144. The notice lists 72,190 shares tied to an exercise of stock options (04/15/2026) and 7,449 shares tied to Restricted Stock Units (03/15/2026). The filing also lists multiple completed 10b5-1 sales in Feb–Mar 2026, including sales of 15,000 shares on 03/05/2026.

Insights

Insider Transactions Compliance Analyst

Form 144 lists planned dispositions and prior 10b5-1 sales by the reporting person.

The filing records proposed sales tied to option exercise (72,190 shares) and RSU settlement (7,449 shares) with multiple executed 10b5-1 trades in Feb–Mar 2026. The sequence suggests scheduled liquidity under prearranged plans rather than ad hoc market timing.

Cash flows and exact settlement mechanics are stated per-line; timing is document‑anchored to the listed dates.

Key Figures

Proposed shares (option exercise): 72,190 shares Proposed shares (RSUs): 7,449 shares Executed sale on 03/05/2026: 15,000 shares +2 more

5 metrics

Proposed shares (option exercise) 72,190 shares Exercise of Stock Options dated 04/15/2026

Proposed shares (RSUs) 7,449 shares Restricted Stock Units dated 03/15/2026

Executed sale on 03/05/2026 15,000 shares 10b5-1 sale dated 03/05/2026 for $928,062.00

Executed sale example 8,542 shares Sale on 03/17/2026 for $530,885.30

Executed sale example 3,639 shares Sale on 03/31/2026 for $236,535.00

Key Terms

10b5-1, Restricted Stock Units, Exercise of Stock Options

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 | 7449 | 03/15/2026"

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.

Exercise of Stock Options financial

"Exercise of Stock Options | Issuer | 72190 | 04/15/2026"

FAQ

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

What did Andrew Callos report on Form 144 for CYTK?

He reported proposed sales of Common Stock, including 72,190 shares from an option exercise and 7,449 shares from RSU settlement, with listed dates in March and April 2026.

Were there prior 10b5-1 sales disclosed in this filing?

Yes. The filing lists multiple 10b5-1 sales in Feb–Mar 2026, including transactions of 15,000 shares on 03/05/2026 and other smaller lots across March 2026.

What is the largest single sale reported in the March entries?

The largest single listed March entry is 15,000 shares sold on 03/05/2026 for $928,062.00, as shown among the disclosed 10b5-1 transactions.

Do the Form 144 entries specify who will receive proceeds?

The entries tie some dispositions to an exercise of stock options and RSU settlement; the filing lists transaction types but does not state a separate recipient other than the reporting person or issuer context.

Are the reported sales part of a 10b5-1 trading plan?

Yes. Several entries are labeled as 10b5-1 Sales, indicating the transactions were executed under a prearranged trading plan as reported in the filing.

Which dates anchor the proposed and completed transactions?

Proposed dispositions listed include 04/15/2026 (option exercise) and 03/15/2026 (RSU-related); executed 10b5-1 sales are dated across Feb–Mar 2026 per the filing.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:55 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	79639	5284047.65	123162807	04/15/2026	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	04/15/2026	Exercise of Stock Options	Issuer			72190	04/15/2026	Cash
Common	03/15/2026	Restricted Stock Units	Issuer			7449	03/15/2026	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	03/31/2026	3639	236535.00
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

144: Remarks and Signature

Remarks	The securities to be sold will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment will be the dates of exercise/sale.
Date of Notice	04/15/2026
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)