LEE SUNG (EVP, Chief Financial Officer) sold 4.7% of their position (3.13K shares) of CYTOKINETICS INC on the open market

Open‑market sale worth $266.4K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

LEE SUNG

Filed: 6/29/2026ACC: 0001061983-26-000070

InsiderLEE SUNGCIK 1793200

→

IssuerCYTOKINETICS INCCIK 1061983

Officer· EVP, Chief Financial Officer

Since Apr 2024

-3.13K

Net shares

Net seller

$266.4K

Total sold

Open market trades

0B · 1S

Total transactions

3.13K acquired · 6.27K disposed

Non-Derivative Transactions6

Common Stock

Direct

M · Option Exercise

+188.00

Price / share

$44.36

Trade value

$8.34K

% of position

0.3%

6/29/2026

63.22K→63.41K

Common Stock

Direct

M · Option Exercise

+822.00

Price / share

$44.36

Trade value

$36.46K

% of position

1.3%

6/29/2026

63.41K→64.23K

Common Stock

Direct

M · Option Exercise

+1.11K

Price / share

$48.51

Trade value

$53.99K

% of position

1.7%

6/29/2026

64.23K→65.34K

Common Stock

Direct

M · Option Exercise

+188.00

Price / share

$44.36

Trade value

$8.34K

% of position

0.3%

6/29/2026

65.34K→65.53K

Common Stock

Direct

M · Option Exercise

+823.00

Price / share

$44.36

Trade value

$36.51K

% of position

1.3%

6/29/2026

65.53K→66.36K

Common Stock

Direct

S · Sale

−3.13K

Price / share

$85.00

Trade value

$266.39K

% of position

4.7%

6/29/2026

66.36K→63.22K

Total

Net shares

+0.00

Net value

-$122.75K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	6/29/2026	M · Option Exercise	+188.00	$44.36	$8.34K	0.3%	63.22K	63.41K
Common Stock Direct	6/29/2026	M · Option Exercise	+822.00	$44.36	$36.46K	1.3%	63.41K	64.23K
Common Stock Direct	6/29/2026	M · Option Exercise	+1.11K	$48.51	$53.99K	1.7%	64.23K	65.34K
Common Stock Direct	6/29/2026	M · Option Exercise	+188.00	$44.36	$8.34K	0.3%	65.34K	65.53K
Common Stock Direct	6/29/2026	M · Option Exercise	+823.00	$44.36	$36.51K	1.3%	65.53K	66.36K
Common Stock Direct	6/29/2026	S · Sale	−3.13K	$85.00	$266.39K	4.7%	66.36K	63.22K
Total			+0.00		-$122.75K

Derivative Transactions5

Incentive Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

188.00 shares

−188.00

Strike price

44.36

Held after

8.83K

Exercisable

—

6/29/2026

Non-Qualified Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

822.00 shares

−822.00

Strike price

44.36

Held after

40.50K

Exercisable

—

6/29/2026

Non-Qualified Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

1.11K shares

−1.11K

Strike price

48.51

Held after

52.30K

Exercisable

—

6/29/2026

Incentive Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

188.00 shares

−188.00

Strike price

44.36

Held after

8.64K

Exercisable

—

6/29/2026

Non-Qualified Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

823.00 shares

−823.00

Strike price

44.36

Held after

39.68K

Exercisable

—

6/29/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Incentive Stock Option (Right to Buy) Direct	Common Stock188.00 shares	6/29/2026	M · Option Exercise	−188.00	44.36	—	8.83K
Non-Qualified Stock Option (Right to Buy) Direct	Common Stock822.00 shares	6/29/2026	M · Option Exercise	−822.00	44.36	—	40.50K
Non-Qualified Stock Option (Right to Buy) Direct	Common Stock1.11K shares	6/29/2026	M · Option Exercise	−1.11K	48.51	—	52.30K
Incentive Stock Option (Right to Buy) Direct	Common Stock188.00 shares	6/29/2026	M · Option Exercise	−188.00	44.36	—	8.64K
Non-Qualified Stock Option (Right to Buy) Direct	Common Stock823.00 shares	6/29/2026	M · Option Exercise	−823.00	44.36	—	39.68K