Skip to main content
Signal8

Lee Sung

SEC insider (Form 3/4/5 filer). CIK 0001793200. EVP, Chief Financial Officer at CYTOKINETICS INC (CYTK) and 1 other issuer. 31 reported Form 4/5 transactions since Sep 2024; latest on Jul 1, 2026. Located in SOUTH SAN FRANCISCO, CA.

Companies Lee Sung has filed insider reports for

  • CYTOKINETICS INC (CYTK): Officer, EVP, Chief Financial Officer
  • Tango Therapeutics, Inc. (TNGX): Director
Lee Sung profile photo

Lee Sung

CIK: 0001793200

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)5 (16.1%)

Position reduction

Option Exercises (M)13 (41.9%)

Derivative conversions

Awards (A)9 (29.0%)

Compensation grants

Other (G, F, J, C, D, …)4 (12.9%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (2)

CYTOKINETICS INC logo
CYTK

CYTOKINETICS INC

Officer
Tango Therapeutics, Inc. logo
TNGX

Tango Therapeutics, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (31 total)

  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jul 1, 2026
    Exercise
    Direct
    1.1K shares at avg. $48.51$54K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jul 1, 2026
    Sale
    Direct
    1.1K shares at avg. $87.79$98K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Exercise
    Direct
    822 shares at avg. $44.36$36K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Exercise
    Direct
    188 shares at avg. $44.36$8K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Exercise
    Direct
    823 shares at avg. $44.36$37K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Sale
    Direct
    3.1K shares at avg. $85.00$266K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Exercise
    Direct
    188 shares at avg. $44.36$8K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 29, 2026
    Exercise
    Direct
    1.1K shares at avg. $48.51$54K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 24, 2026
    Exercise
    Direct
    2.8K shares at avg. $44.36$125K
  • CYTOKINETICS INC logo
    CYTK

    CYTOKINETICS INC

    Jun 24, 2026
    Exercise
    Direct
    9.3K shares at avg. $44.36$413K

1-10 of 31