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person · Reporting owner

Lee Sung

Disclosed activity across 4 companies

Tapewire entity
33455
SEC CIK
0001793200

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
CYTOKINETICS INCCYTK · Entity 3528EVP, Chief Financial OfficerJuly 01, 2026July 02, 2026
SANGAMO THERAPEUTICS, INCSGMO · Entity 7038EVP, Chief Financial OfficerNovember 25, 2020December 01, 2020
Tango Therapeutics, Inc.TNGX · Entity 1497DirectorJune 05, 2026June 08, 2026
Vir Biotechnology, Inc.VIR · Entity 4522EVP & Chief Financial OfficerMarch 27, 2024March 28, 2024

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

CYTOKINETICS INC

Report date July 01, 2026 · Filed July 02, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect63,221 Ending reported balance After 2026-07-01 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-07-01 · Exercise / conversion · Acquired 1,112 · Balance 64,333

Row 2 · 2026-07-01 · Sale · Disposed 1,112 · Balance 63,221

Non-Qualified Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $48.51 · Expires 2034-05-30Direct26,709 Reported balance After 2026-07-01 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-07-01 · Exercise / conversion · Disposed 1,112 · Balance 26,709

SANGAMO THERAPEUTICS, INC

Report date November 25, 2020 · Filed December 01, 2020

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect88,708 Reported balance After 2020-11-25 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2020-11-25 · Tax withholding · Disposed 5,042 · Balance 88,708

F1: Represents shares underlying the portion of the restricted stock unit grant that vested on November 25, 2020 surrendered by the Reporting Person to the Issuer for tax withholding, using the Issuer's closing stock price on November 25, 2020 of $9.77/share, pursuant to the terms of the Issuer's Amended and Restated 2018 Equity Incentive Plan, as amended (the "2018 EIP, as amended").

F2: Includes: 9,540 shares resulting from the November 25, 2020 vesting of Reporting Person's November 25, 2019 restricted stock unit ("RSU") grant; 29,168 shares subject to such RSU grant that will vest in two remaining annual installments on November 25, 2021 and 2022, resulting in such RSU grant being vested in full on the third (3rd) anniversary of the grant date; 50,000 shares of common stock issuable upon settlement of RSUs granted to the Reporting Person on February 25, 2020. All such RSUs vest with respect to 1/3rd of the shares in each respective RSU grant in three equal annual installments over the three-year period measured from the dates of grant, subject to the Reporting Person's Continuous Service as defined in the 2018 EIP, as amended, through such dates and subject to acceleration as defined in the 2018 EIP, as amended.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares underlying the portion of the restricted stock unit grant that vested on November 25, 2020 surrendered by the Reporting Person to the Issuer for tax withholding, using the Issuer's closing stock price on November 25, 2020 of $9.77/share, pursuant to the terms of the Issuer's Amended and Restated 2018 Equity Incentive Plan, as amended (the "2018 EIP, as amended").

F2: Includes: 9,540 shares resulting from the November 25, 2020 vesting of Reporting Person's November 25, 2019 restricted stock unit ("RSU") grant; 29,168 shares subject to such RSU grant that will vest in two remaining annual installments on November 25, 2021 and 2022, resulting in such RSU grant being vested in full on the third (3rd) anniversary of the grant date; 50,000 shares of common stock issuable upon settlement of RSUs granted to the Reporting Person on February 25, 2020. All such RSUs vest with respect to 1/3rd of the shares in each respective RSU grant in three equal annual installments over the three-year period measured from the dates of grant, subject to the Reporting Person's Continuous Service as defined in the 2018 EIP, as amended, through such dates and subject to acceleration as defined in the 2018 EIP, as amended.

Tango Therapeutics, Inc.

Report date June 05, 2026 · Filed June 08, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect22,870 Reported balance After 2026-06-05 transaction · row 1
1 source row

Row 1 · 2026-06-05 · Grant · Acquired 570 · Balance 22,870

F1: These shares are represented by restricted stock units (the "RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest in their entirety on the earlier of: (i) June 5, 2027 and (ii) the date of the next annual meeting of stockholders, in each case subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $20.22 · Expires 2036-06-05Direct3,570 Reported balance After 2026-06-05 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-06-05 · Grant · Acquired 3,570 · Balance 3,570

F2: This option shall vest and become exercisable in 12 substantially equal monthly installments over a period of one year, with the first vesting date on July 5, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: These shares are represented by restricted stock units (the "RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest in their entirety on the earlier of: (i) June 5, 2027 and (ii) the date of the next annual meeting of stockholders, in each case subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

F2: This option shall vest and become exercisable in 12 substantially equal monthly installments over a period of one year, with the first vesting date on July 5, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

Vir Biotechnology, Inc.

Report date March 27, 2024 · Filed March 28, 2024

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect100,492 Reported balance After 2024-03-27 transaction · row 1
1 source row

Row 1 · 2024-03-27 · Sale · Disposed 6,008 · Balance 100,492

F1: Represents the automatic sale of shares to cover the Issuer's tax withholding and remittance obligation in connection with the vesting of restricted stock units.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the automatic sale of shares to cover the Issuer's tax withholding and remittance obligation in connection with the vesting of restricted stock units.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
July 01, 2026 Filed Jul 2, 2026 21:17 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 1,112 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001061983-26-000072 · form4.xml · derivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,709

Underlying: Common Stock · 1,112 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
July 01, 2026 Filed Jul 2, 2026 21:17 UTC CYTOKINETICS INC CYTK · Entity 3528 SaleCommon Stock 1,112 $87.79 $97,622.48
Disclosure

SEC source: 0001061983-26-000072 · form4.xml · nonDerivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,221

Read SEC document
July 01, 2026 Filed Jul 2, 2026 21:17 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 1,112 $48.51 $53,943.12
Disclosure

SEC source: 0001061983-26-000072 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 64,333

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 823 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · derivative · entry 11

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,681

Underlying: Common Stock · 823 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 188 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · derivative · entry 10

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,640

Underlying: Common Stock · 188 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 1,113 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · derivative · entry 9

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 52,304

Underlying: Common Stock · 1,113 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 822 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · derivative · entry 8

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,504

Underlying: Common Stock · 822 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 188 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · derivative · entry 7

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,828

Underlying: Common Stock · 188 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 SaleCommon Stock 3,134 $85.00 $266,390.00
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 6

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,221

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 823 $44.36 $36,508.28
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 5

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,355

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 188 $44.36 $8,339.68
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 4

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,532

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 1,113 $48.51 $53,991.63
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,344

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 822 $44.36 $36,463.92
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 64,231

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 29, 2026 Filed Jun 29, 2026 21:23 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 188 $44.36 $8,339.68
Disclosure

SEC source: 0001061983-26-000070 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,409

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 1,113 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 15

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 27,821

Underlying: Common Stock · 1,113 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 822 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 14

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 31,197

Underlying: Common Stock · 822 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 188 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 13

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,011

Underlying: Common Stock · 188 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 1,113 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 12

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,934

Underlying: Common Stock · 1,113 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 2,817 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 11

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,199

Underlying: Common Stock · 2,817 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 9,307 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 10

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,019

Underlying: Common Stock · 9,307 shares

Expires 2035-03-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionNon-Qualified Stock Option (Right to Buy) · Derivative 23,370 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · derivative · entry 9

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,047

Underlying: Common Stock · 23,370 shares

Expires 2034-05-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 SaleCommon Stock 38,730 $82.30 $3,187,479.00
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 8

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,221

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 1,113 $48.51 $53,991.63
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 7

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 101,951

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 822 $44.36 $36,463.92
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 6

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 100,838

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 188 $44.36 $8,339.68
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 5

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 100,016

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 1,113 $48.51 $53,991.63
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 4

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 99,828

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 2,817 $44.36 $124,962.12
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 98,715

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 9,307 $44.36 $412,858.52
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 95,898

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 24, 2026 Filed Jun 29, 2026 22:05 UTC CYTOKINETICS INC CYTK · Entity 3528 Exercise / conversionCommon Stock 23,370 $48.51 $1,133,678.70
Disclosure

SEC source: 0001061983-26-000071 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 86,591

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 05, 2026 Filed Jun 8, 2026 21:49 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantStock Option (Right to Buy) · Derivative 3,570 $0.00 Strike: $20.22 $0.00
Disclosure

SEC source: 0001193125-26-262172 · ownership.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,570

Underlying: Common Stock · 3,570 shares

Expires 2036-06-05

F2 · derivative.exercise_date: This option shall vest and become exercisable in 12 substantially equal monthly installments over a period of one year, with the first vesting date on July 5, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

Read SEC document
June 05, 2026 Filed Jun 8, 2026 21:49 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantCommon Stock 570 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-262172 · ownership.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,870

F1 · shares: These shares are represented by restricted stock units (the "RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest in their entirety on the earlier of: (i) June 5, 2027 and (ii) the date of the next annual meeting of stockholders, in each case subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

Read SEC document
May 05, 2026 Filed May 5, 2026 20:18 UTC CYTOKINETICS INC CYTK · Entity 3528 SaleCommon Stock 23,906 $76.87 $1,837,654.22
Disclosure

SEC source: 0001061983-26-000049 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,221

Read SEC document
April 29, 2026 Filed May 1, 2026 21:26 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantStock Option (Right to Buy) · Derivative 5,200 $0.00 Strike: $22.06 $0.00
Disclosure

SEC source: 0001193125-26-201749 · ownership.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,200

Underlying: Common Stock · 5,200 shares

Expires 2036-04-29

F2 · derivative.exercise_date: This option shall vest and become exercisable in 36 substantially equal monthly installments over a period of three years commencing on January 2, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date. The options were granted in connection with the Reporting Person's service on the Issuer's board of directors and reflect the value the Reporting Person is entitled to pursuant to the Issuer's Non-Employee Director Compensation Policy.

Read SEC document
April 29, 2026 Filed May 1, 2026 21:26 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantCommon Stock 12,300 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-201749 · ownership.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,300

F1 · shares: These shares are represented by restricted stock units (the "RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest in three substantially equal annual installments on January 2, 2027, January 2, 2028 and January 2, 2029, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date. The RSUs were granted in connection with the Reporting Person's service on the Issuer's board of directors and reflect the value the Reporting Person is entitled to pursuant to the Issuer's Non-Employee Director Compensation Policy.

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March 17, 2026 Filed Mar 18, 2026 21:46 UTC CYTOKINETICS INC CYTK · Entity 3528 SaleCommon Stock 4,935 $62.15 $306,710.25
Disclosure

SEC source: 0001061983-26-000029 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,127

F1 · kind: Company compelled sell-to-cover transaction to satisfy tax withholding obligations attributable to RSU vesting.

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March 15, 2026 Filed Mar 17, 2026 20:05 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantNon-Qualified Stock Option (Right to Buy) · Derivative 29,480 $0.00 Strike: $60.06 $0.00
Disclosure

SEC source: 0001061983-26-000021 · form4.xml · derivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,480

Underlying: Common Stock · 29,480 shares

Expires 2036-03-14

F3 · kind: Annual equity award comprised of stock options that vest in 48 equal monthly installments, subject to officer's continued employment with the company on each vesting date. Stock options are subject to the company's Amended and Restated 2004 Equity Incentive Plan.

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March 15, 2026 Filed Mar 17, 2026 20:05 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantIncentive Stock Option (Right to Buy) · Derivative 1,665 $0.00 Strike: $60.06 $0.00
Disclosure

SEC source: 0001061983-26-000021 · form4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,665

Underlying: Common Stock · 1,665 shares

Expires 2036-03-14

F2 · kind: Annual equity award comprised of stock options that vest in 48 equal monthly installments, subject to officer's continued employment with the company on each vesting date. Stock options are subject to the company's Amended and Restated 2004 Equity Incentive Plan.

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March 15, 2026 Filed Mar 17, 2026 20:05 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 20,646 $0.00 $0.00
Disclosure

SEC source: 0001061983-26-000021 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,062

F1 · kind: Annual equity award comprised of restricted stock units ("RSUs") that convert on a 1:1 basis for shares of our common stock. RSUs vest, subject to the officer's continued employment with the company, as follows: 40% of the RSUs on the 1-year anniversary of the grant date, an additional 40% of the RSUs on the 2-year anniversary of the grant date, and the final 20% of the RSUs on the 3-year anniversary of the grant date. RSUs are subject to the company's Amended and Restated 2004 Equity Incentive Plan.

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January 02, 2026 Filed Jan 6, 2026 21:10 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantStock Option (Right to Buy) · Derivative 60,000 $0.00 Strike: $8.93 $0.00
Disclosure

SEC source: 0001193125-26-004433 · ownership.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,000

Underlying: Common Stock · 60,000 shares

Expires 2036-01-02

F2 · derivative.exercise_date: This option shall vest and become exercisable in 36 substantially equal monthly installments over a period of three years following the grant date, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

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January 02, 2026 Filed Jan 6, 2026 21:10 UTC Tango Therapeutics, Inc. TNGX · Entity 1497 GrantCommon Stock 10,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-004433 · ownership.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

F1 · shares: These shares are represented by restricted stock units (the "RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The RSUs will vest in three substantially equal annual installments following the grant date, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date.

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December 22, 2025 Filed Dec 29, 2025 21:03 UTC CYTOKINETICS INC CYTK · Entity 3528 Tax withholdingCommon Stock 805 $62.72 $50,489.60
Disclosure

SEC source: 0001061983-25-000053 · form4.xml · nonDerivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,416

F3 · kind: Shares withheld for tax withholding upon vesting of performance shares.

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December 22, 2025 Filed Dec 29, 2025 21:03 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 2,152 $0.00 $0.00
Disclosure

SEC source: 0001061983-25-000053 · form4.xml · nonDerivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,221

F2 · kind: Performance shares earned upon achievement of performance goal. Shares vested immediately.

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December 22, 2025 Filed Dec 29, 2025 21:03 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 2,152 $0.00 $0.00
Disclosure

SEC source: 0001061983-25-000053 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,069

F1 · kind: Performance shares earned upon achievement of performance goal. Shares remain subject to 1-year time vesting requirement.

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December 03, 2025 Filed Dec 5, 2025 21:25 UTC CYTOKINETICS INC CYTK · Entity 3528 Tax withholdingCommon Stock 1,560 $65.02 $101,431.20
Disclosure

SEC source: 0001061983-25-000046 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,917

F1 · kind: Sell to cover transaction for tax withholding upon vesting of Performance Stock Units granted earned on December 2, 2024.

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June 02, 2025 Filed Jun 3, 2025 20:02 UTC CYTOKINETICS INC CYTK · Entity 3528 Tax withholdingCommon Stock 4,965 $31.21 $154,957.65
Disclosure

SEC source: 0001127602-25-016416 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,477

F1 · kind: Transactions represent withholding of restricted stock units upon vesting of 13,874 restricted stock units. Reporting person received 8,909 net shares of common stock after the withholding transaction..

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March 14, 2025 Filed Mar 18, 2025 20:24 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantNon-Qualified Stock Option (Right to Buy) · Derivative 41,326 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001127602-25-009770 · form4.xml · derivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,326

Underlying: Common Stock · 41,326 shares

Expires 2035-03-13

F3 · kind: Stock options vest in equal monthly installments over 48 months from the date of grant, subject to Mr. Lee's continued employment with the company on the scheduled vesting date.

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March 14, 2025 Filed Mar 18, 2025 20:24 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantIncentive Stock Option (Right to Buy) · Derivative 9,016 $0.00 Strike: $44.36 $0.00
Disclosure

SEC source: 0001127602-25-009770 · form4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,016

Underlying: Common Stock · 9,016 shares

Expires 2035-03-13

F2 · kind: Stock options vest in equal monthly installments over 48 months from the date of grant, subject to Mr. Lee's continued employment with the company on the scheduled vesting date.

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March 14, 2025 Filed Mar 18, 2025 20:24 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 32,687 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-009770 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,442

F1 · kind: Comprised of restricted stock units that convert to shares of common stock on a 1:1 basis upon vesting. 40% of the RSUs will vest on the 1-year anniversary of the date of grant; an additional 40% of the RSUs will vest on the 2-year anniversary of the date of grant; and the final 20% of the RSUs will vest on the 3-year anniversary of the date of grant, in each case subject to Mr. Lee's continued employment with the company on the scheduled vesting date.

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December 03, 2024 Filed Dec 5, 2024 21:30 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 4,304 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-028721 · form4.xml · nonDerivative · entry 3

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,755

F3 · kind: Transaction represents shares of PSUs whose performance condition was satisfied but that remain subject to time-based vesting. These PSUs to vest in full December 3, 2025.

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December 03, 2024 Filed Dec 5, 2024 21:30 UTC CYTOKINETICS INC CYTK · Entity 3528 Tax withholdingCommon Stock 1,536 $51.51 $79,119.36
Disclosure

SEC source: 0001127602-24-028721 · form4.xml · nonDerivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,451

F2 · kind: Transaction represents withholding of shares to satisfy grantee's tax obligations in connection with vesting PSUs.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.