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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
December 03, 2024 Filed Dec 5, 2024 21:30 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 4,303 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-028721 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,987

F1 · kind: Transaction represents gross shares of common stock received by grantee upon vesting of Performance Stock Units ("PSUs").

Read SEC document
May 31, 2024 Filed Jun 3, 2024 21:07 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantNon-Qualified Stock Option (Right to Buy) · Derivative 53,417 $0.00 Strike: $48.51 $0.00
Disclosure

SEC source: 0001127602-24-017329 · form4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,417

Underlying: Common Stock · 53,417 shares

Expires 2034-05-30

F2 · kind: Comprised of non-statutory stock options to purchase shares of common stock and vesting as follows: 25% on the 1-year anniversary of the grant date and the remaining 75% vesting in equal monthly installments over the subsequent 36 months from the 1-year anniversary of the grant date, in each case subject to continued employment.

Read SEC document
May 31, 2024 Filed Jun 3, 2024 21:07 UTC CYTOKINETICS INC CYTK · Entity 3528 GrantCommon Stock 34,684 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-017329 · form4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,684

F1 · kind: Comprised of restricted stock units convertible into shares of common stock on a 1-for-1 basis and vesting as follows: 40% on the 1-year anniversary of the grant date, an additional 40% on the 2-year anniversary of the grant date, and the remaining 20% on the 3-year anniversary of the grant date, in each case subject to the grantee's continued employment.

Read SEC document
March 27, 2024 Filed Mar 28, 2024 16:18 UTC Vir Biotechnology, Inc. VIR · Entity 4522 SaleCommon Stock 6,008 $9.89 $59,404.10
Disclosure

SEC source: 0001628280-24-013555 · wk-form4_1711642726.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,492

F1 · kind: 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.

Read SEC document
February 22, 2024 Filed Feb 27, 2024 00:32 UTC Vir Biotechnology, Inc. VIR · Entity 4522 GrantStock Option (Right to Buy) · Derivative 80,000 $0.00 Strike: $10.11 $0.00
Disclosure

SEC source: 0001628280-24-006983 · wk-form4_1708993922.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

Underlying: Common Stock · 80,000 shares

Expires 2034-02-21

F2 · derivative.exercise_date: 25% of the shares subject to the stock option vest and become exercisable on February 22, 2025, and the remainder vest in 36 equal monthly installments thereafter.

Read SEC document
February 22, 2024 Filed Feb 27, 2024 00:32 UTC Vir Biotechnology, Inc. VIR · Entity 4522 GrantCommon Stock 40,000 $0.00 $0.00
Disclosure

SEC source: 0001628280-24-006983 · wk-form4_1708993922.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,500

F1 · kind: Acquisition of restricted stock units pursuant to the Issuer's Equity Incentive Plan.

Read SEC document
March 27, 2023 Filed Mar 29, 2023 21:49 UTC Vir Biotechnology, Inc. VIR · Entity 4522 GrantStock Option (Right to Buy) · Derivative 133,000 $0.00 Strike: $23.01 $0.00
Disclosure

SEC source: 0001209191-23-021548 · doc4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,000

Underlying: Common Stock · 133,000 shares

Expires 2033-03-26

F2 · derivative.exercise_date: 25% of the shares subject to the stock option vest and become exercisable on March 27, 2024, and the remainder vest in 36 equal monthly installments thereafter.

Read SEC document
March 27, 2023 Filed Mar 29, 2023 21:49 UTC Vir Biotechnology, Inc. VIR · Entity 4522 GrantCommon Stock 66,500 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-021548 · doc4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,500

F1 · kind: Acquisition of restricted stock units pursuant to the Issuer's Equity Incentive Plan.

Read SEC document
November 25, 2020 Filed Dec 1, 2020 00:46 UTC SANGAMO THERAPEUTICS, INC SGMO · Entity 7038 Tax withholdingCommon Stock 5,042 $9.77 $49,260.34
Disclosure

SEC source: 0001209191-20-060811 · doc4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,708

F1 · shares: 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 · balance_after: 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.

Read SEC document
February 25, 2020 Filed Feb 27, 2020 00:31 UTC SANGAMO THERAPEUTICS, INC SGMO · Entity 7038 GrantStock Option (Right-to-Buy) · Derivative 100,500 $0.00 Strike: $6.80 $0.00
Disclosure

SEC source: 0001209191-20-013230 · doc4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,500

Underlying: Common Stock · 100,500 shares

Expires 2030-02-24

F2 · derivative.exercise_date: One-quarter (1/4) of the option shares vest and become exercisable upon completion of one (1) year of service by the Reporting Person measured from the February 25, 2020 grant date, and the remainder will vest and become exercisable in equal monthly installments for thirty-six (36) months thereafter, provided that the Reporting Person remains in service with the Issuer through each such monthly vesting date.

Read SEC document
February 25, 2020 Filed Feb 27, 2020 00:31 UTC SANGAMO THERAPEUTICS, INC SGMO · Entity 7038 GrantCommon Stock 50,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-20-013230 · doc4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,750

F1 · shares: Represents 50,000 shares subject to restricted stock units granted on February 25, 2020 that will vest in three (3) equal annual installments on each anniversary of the grant date, such that they will be vested in full on the third (3rd) anniversary of the grant date, subject to the Reporting Person's continued service with the Issuer through such dates.

Read SEC document
November 25, 2019 Filed Nov 26, 2019 21:15 UTC SANGAMO THERAPEUTICS, INC SGMO · Entity 7038 GrantStock Option (Right to Buy) · Derivative 262,000 $0.00 Strike: $10.35 $0.00
Disclosure

SEC source: 0001209191-19-058104 · doc4.xml · derivative · entry 2

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 262,000

Underlying: Common Stock · 262,000 shares

Expires 2029-11-24

F2 · derivative.exercise_date: One-quarter (1/4) of the option shares vest and become exercisable upon completion of one (1) year of service by the Reporting Person measured from the November 25, 2019 grant date, and the remainder will vest and become exercisable in equal monthly installments for thirty-six (36) months thereafter, provided that the Reporting Person remains in service with the Issuer through each such monthly vesting date.

Read SEC document
November 25, 2019 Filed Nov 26, 2019 21:15 UTC SANGAMO THERAPEUTICS, INC SGMO · Entity 7038 GrantCommon Stock 43,750 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-058104 · doc4.xml · nonDerivative · entry 1

Lee Sung · CIK 0001793200 · EVP, Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,750

F1 · shares: Includes 43,750 shares of common stock issuable upon settlement of restricted stock units ("RSUs") granted to the Reporting Person on November 25, 2019. The RSUs will vest with respect to 1/3rd of the shares in three equal annual installments over the three-year period measured from the date of grant, subject to the Reporting Person's continued service with the Issuer through such date.

Read SEC document

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