Robert I. Blum - 22 Dec 2025 Form 4 Insider Report for CYTOKINETICS INC (CYTK)

Role
President & CEO, Director
Signature
/s/ John O. Faurescu, attorney-in-fact for Mr. Blum
Issuer symbol
CYTK
Transactions as of
22 Dec 2025
Net transactions value
-$1,599,321
Form type
4
Filing time
23 Dec 2025, 16:26:45 UTC
Previous filing
05 Dec 2025
Next filing
10 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Blum Robert I President & CEO, Director 350 OYSTER POINT BLVD, SOUTH SAN FRANCISCO /s/ John O. Faurescu, attorney-in-fact for Mr. Blum 23 Dec 2025 0001288859

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CYTK Common Stock Options Exercise $365,029 +54,727 +16% $6.67 404,929 22 Dec 2025 Direct F1
transaction CYTK Common Stock Tax liability $2,074,445 -30,426 -7.5% $68.18 374,503 22 Dec 2025 Direct F2
transaction CYTK Common Stock Options Exercise $110,095 +16,506 +4.4% $6.67 391,009 22 Dec 2025 Direct F3
holding CYTK Common Stock 2,083 22 Dec 2025 by Trust 1 F4
holding CYTK Common Stock 2,083 22 Dec 2025 by Trust 2 F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CYTK Non-Qualified Stock Option (Right to Buy) Options Exercise $0 -54,727 -100% $0.000000 0 22 Dec 2025 Common Stock 54,727 $6.67 Direct
transaction CYTK Incentive Stock Option (Right to Buy) Options Exercise $0 -16,506 -100% $0.000000 0 22 Dec 2025 Common Stock 16,506 $6.67 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Net share settlement transaction. Not a market transaction.
F2 Shares represent withholding of shares to cover exercise price and tax withholding obligations resulting from the net share settlement of 54,727 non-qualified stock options.
F3 Cash exercise and hold transaction.
F4 Shares held by The Bridget Blum 2003 Irrevocable Trust.
F5 Shares held by The Brittany Blum 2003 Irrevocable Trust.