Insiders / Lee Sung

Lee Sung

CIK 1793200personinsider

Companies

2

First seen

Jan 6, 2026

Last activity

Jun 29, 2026

Companies

Company	Role	Shares held	Peak held	Trades	Latest
Cytokinetics Inc · CYTK	Executive	63,221	101,951	31	—
Tango Therapeutics, Inc. · TNGX	Director	10,000	60,000	2	—

All securities held

5 positions · latest reported per filing

Company	Security	Shares	As of
Cytokinetics Inc	Common Stock	63,221	Jun 29, 2026
Cytokinetics Inc	Non-Qualified Stock Option (Right to Buy)Derivative	39,681	Jun 29, 2026
Cytokinetics Inc	Incentive Stock Option (Right to Buy)Derivative	8,640	Jun 29, 2026
Tango Therapeutics, Inc.	Common Stock	10,000	Jan 2, 2026
Tango Therapeutics, Inc.	Stock Option (Right to Buy)Derivative	60,000	Jan 2, 2026

Activity

InsidersInstitutions

This person's insider trades (Form 4), across every company.

Date	Action	Company	Value	Shares Δ	Position after	Impact
Jun 24, 2026	Sell	CYTK Cytokinetics Inc Common Stock	$3.19M	-39K -37.99%	63,221 0.05% of shares	medium
May 5, 2026	Sell	CYTK Cytokinetics Inc Common Stock	$1.84M	-24K -27.44%	63,221 0.05% of shares	medium
Jun 24, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$1.13M	+23K +36.97%	86,591 0.06% of shares	low
Jun 24, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$412.9K	+9K +10.75%	95,898 0.07% of shares	low
Mar 17, 2026	Sell	CYTK Cytokinetics Inc Common Stock	$306.7K	-5K -5.36%	87,127 0.06% of shares	medium
Jun 29, 2026	Sell	CYTK Cytokinetics Inc Common Stock	$266.4K	-3K -4.72%	63,221 0.05% of shares	medium
Jun 24, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$125.0K	+3K +2.94%	98,715 0.07% of shares	low
Jun 24, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$54.0K	+1K +1.10%	101,951 0.07% of shares	low
Jun 24, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$54.0K	+1K +1.13%	99,828 0.07% of shares	low
Jun 29, 2026	Exercise	CYTK Cytokinetics Inc Common Stock	$54.0K	+1K +1.73%	65,344 0.05% of shares	low