Executive reports multiple 10b5-1 stock sales

Andrew Callos reported multiple planned sales of Common Stock under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Andrew Callos reported multiple planned sales of Common Stock under a Rule 10b5-1 plan. The filing lists individual dispositions dated between 12/29/2025 and 03/09/2026, including transactions of 15,000 shares on 01/05/2026 and 15,000 shares on 02/05/2026, with listed proceeds for each trade. The transactions are described as 10b5-1 sales.

Insights

Corporate Governance Analyst

Insider executed scheduled 10b5-1 sales across multiple dates; pattern consistent with pre-arranged liquidity.

Andrew Callos reports a sequence of dispositions labeled as 10b5-1 Sales, with multiple entries of $928,062.00 for 03/05/2026 and similar amounts on other dates. The filing lists exact share counts and gross proceeds by date.

These entries reflect pre-arranged trading activity; cash‑flow treatment to the selling holder is clear from the schedule, and timing follows the plan dates shown in the excerpt.

FAQ

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

What did the Form 144 for CYTK disclose about insider sales?

The Form 144 discloses multiple planned dispositions by Andrew Callos under a Rule 10b5-1 plan. The filing lists individual share counts and gross proceeds for trades between 12/29/2025 and 03/09/2026, including several 15,000-share transactions.

How many shares did Andrew Callos sell on key dates in the filing?

The filing shows several specific trades of 15,000 shares on dates including 01/05/2026 and 02/05/2026. It also lists other quantities such as 2,582 and 1,809 shares on earlier and later dates in the excerpt.

Were the sales described as part of a trading plan in the Form 144?

Yes. The dispositions are labeled throughout the excerpt as 10b5-1 Sales, indicating they were executed under a pre-arranged Rule 10b5-1 plan rather than ad hoc open‑market timing decisions.

What proceeds are listed for the reported transactions in the filing?

The excerpt lists gross proceeds for individual trades, for example $928,062.00 for a 15,000-share sale on 03/05/2026 and $904,165.50 for a 15,000-share sale on 01/05/2026, with other per‑trade dollar amounts shown.

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

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Accepted by SEC EDGAR 03/16/2026 - 04:39 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	1709	102642.54	123162807	03/16/2026	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	03/14/2026	Restricted Stock Units	Issuer			1709	03/14/2026	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
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
10b5-1 Sales for ANDREW CALLOS 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	12/29/2025	1809	112953.96

144: Remarks and Signature

Remarks
Date of Notice	03/16/2026
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)