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person · Reporting owner

Sung Derrick

Disclosed activity across 3 companies

Tapewire entity
72304
SEC CIK
0001670118

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MINERVA SURGICAL INCUTRS · Entity 115564DirectorJuly 19, 2022August 09, 2022
Pulmonx CorpLUNG · Entity 2359COO and CFODecember 01, 2025December 04, 2025
iRhythm Holdings, Inc.IRTC · Entity 1499EVP, Strat Corp DevelopmentFebruary 27, 2019March 18, 2019

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.

MINERVA SURGICAL INC

Report date July 19, 2022 · Filed August 09, 2022

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect86,956 Reported balance After 2022-07-19 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2022-07-19 · Grant · Acquired 86,956 · Balance 86,956

F1: These securities are restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock. Each RSU award will vest in twelve equal quarterly installments on the quarterly anniversary of the grant date, subject to the Reporting Person continuing as a service provider through each such date.

Filing footnotes · ownership attribution and instrument terms

F1: These securities are restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock. Each RSU award will vest in twelve equal quarterly installments on the quarterly anniversary of the grant date, subject to the Reporting Person continuing as a service provider through each such date.

Pulmonx Corp

Report date December 01, 2025 · Filed December 04, 2025

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect1,335,319 Reported balance After 2025-12-01 transaction · row 1
1 source row

Row 1 · 2025-12-01 · Grant · Acquired 1,200,000 · Balance 1,335,319

F1: Represents grant of Restricted Stock Units payable solely in common stock of the Issuer, 25% of which vests one year from the grant date of December 1, 2025, and the remainder vests in equal quarterly installments over the three-year period following the date of grant.

Performance Stock UnitsSEC Table II · derivative / convertible security · Expires 2028-12-01Direct400,000 Reported balance After 2025-12-01 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2025-12-01 · Grant · Acquired 400,000 · Balance 400,000

F2: Each Performance Stock Unit represents a contingent right to receive one share of the Issuer's common stock. The Performance Stock Units vest upon meeting the following two conditions: (a) upon the Issuer's common stock achieving a specified price per share and (b) with respect to 33% on the one year following the grant date of December 1, 2025 and the remainder in eight equal quarterly installments.

Filing footnotes · ownership attribution and instrument terms

F1: Represents grant of Restricted Stock Units payable solely in common stock of the Issuer, 25% of which vests one year from the grant date of December 1, 2025, and the remainder vests in equal quarterly installments over the three-year period following the date of grant.

F2: Each Performance Stock Unit represents a contingent right to receive one share of the Issuer's common stock. The Performance Stock Units vest upon meeting the following two conditions: (a) upon the Issuer's common stock achieving a specified price per share and (b) with respect to 33% on the one year following the grant date of December 1, 2025 and the remainder in eight equal quarterly installments.

iRhythm Holdings, Inc.

Report date February 27, 2019 · Filed March 18, 2019 · Amendment

Amendment: balances below belong to this corrected disclosure, not necessarily a complete replacement of earlier positions.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect26,983 Reported balance After 2019-02-27 transaction · row 1 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 1 · 2019-02-27 · Grant · Acquired 1,725 · Balance 26,983

F1: The reported securities are represented by restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of IRTC common stock. This amendment is filed to set forth the correct vesting schedule of the RSUs, which is 25% of the shares on March 1, 2020 and each one-year anniversary thereafter.

Filing footnotes · ownership attribution and instrument terms

F1: The reported securities are represented by restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of IRTC common stock. This amendment is filed to set forth the correct vesting schedule of the RSUs, which is 25% of the shares on March 1, 2020 and each one-year anniversary thereafter.

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
January 28, 2019 Filed Jan 30, 2019 16:38 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 SaleCommon Stock 9,068 $84.04 $762,029.38
Disclosure

SEC source: 0001209191-19-006014 · doc4.xml · nonDerivative · entry 3

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,258

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 26, 2018.

F2 · price: This transaction was executed in multiple trades at prices ranging from $84.00 to $84.335. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Read SEC document
January 28, 2019 Filed Jan 30, 2019 16:38 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 3,068 $35.25 $108,147.00
Disclosure

SEC source: 0001209191-19-006014 · doc4.xml · nonDerivative · entry 2

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,326

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.

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 26, 2018.

Read SEC document
January 28, 2019 Filed Jan 30, 2019 16:38 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 6,000 $6.35 $38,100.00
Disclosure

SEC source: 0001209191-19-006014 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,258

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.

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 26, 2018.

Read SEC document
November 05, 2018 Filed Nov 6, 2018 18:30 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 5,800 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0001209191-18-057462 · doc4.xml · derivative · entry 2

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,091

Underlying: Common Stock · 5,800 shares

Expires 2025-06-15

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
November 05, 2018 Filed Nov 6, 2018 18:30 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 5,800 $6.35 $36,830.00
Disclosure

SEC source: 0001209191-18-057462 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,258

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
October 16, 2018 Filed Oct 17, 2018 13:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 10,000 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0001209191-18-055286 · doc4.xml · derivative · entry 3

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98,891

Underlying: Common Stock · 10,000 shares

Expires 2025-06-15

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
October 16, 2018 Filed Oct 17, 2018 13:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 SaleCommon Stock 10,000 $88.01 $880,100.00
Disclosure

SEC source: 0001209191-18-055286 · doc4.xml · nonDerivative · entry 2

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,458

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 9, 2018.

F2 · price: This transaction was executed in multiple trades at prices ranging from $88.00 to $88.10. The prices reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Read SEC document
October 16, 2018 Filed Oct 17, 2018 13:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 10,000 $6.35 $63,500.00
Disclosure

SEC source: 0001209191-18-055286 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,458

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.

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 9, 2018.

Read SEC document
October 09, 2018 Filed Oct 10, 2018 14:27 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 10,000 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0001209191-18-054640 · doc4.xml · derivative · entry 3

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 108,891

Underlying: Common Stock · 10,000 shares

Expires 2025-06-15

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
October 09, 2018 Filed Oct 10, 2018 14:27 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 SaleCommon Stock 10,000 $83.10 $831,000.00
Disclosure

SEC source: 0001209191-18-054640 · doc4.xml · nonDerivative · entry 2

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,458

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 9, 2018.

F2 · price: This transaction was executed in multiple trades at prices ranging from $81.72 to $84.96. The prices reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Read SEC document
October 09, 2018 Filed Oct 10, 2018 14:27 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 10,000 $6.35 $63,500.00
Disclosure

SEC source: 0001209191-18-054640 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · EVP, Strat Corp Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,458

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.

F1 · kind: The option exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 9, 2018.

Read SEC document
September 18, 2018 Filed Sep 19, 2018 12:51 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 2,800 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0000899243-18-024722 · doc4.xml · derivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 118,891

Underlying: Common Stock · 2,800 shares

Expires 2025-06-15

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
September 18, 2018 Filed Sep 19, 2018 12:51 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 2,800 $6.35 $17,780.00
Disclosure

SEC source: 0000899243-18-024722 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,458

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
August 02, 2018 Filed Aug 6, 2018 14:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 10,000 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0000899243-18-021469 · doc4.xml · derivative · entry 3

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,691

Underlying: Common Stock · 10,000 shares

Expires 2025-06-15

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
August 02, 2018 Filed Aug 6, 2018 14:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 SaleCommon Stock 10,000 $82.01 $820,100.00
Disclosure

SEC source: 0000899243-18-021469 · doc4.xml · nonDerivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,658

F1 · kind: The sale reported in this Form 4 was effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on May 30, 2018.

Read SEC document
August 02, 2018 Filed Aug 6, 2018 14:37 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 10,000 $6.35 $63,500.00
Disclosure

SEC source: 0000899243-18-021469 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,658

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.

F1 · kind: The sale reported in this Form 4 was effected pursuant to Rule 10b5-1 trading plan adopted by the reporting person on May 30, 2018.

Read SEC document
July 31, 2018 Filed Aug 1, 2018 18:04 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 2,800 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0000899243-18-021009 · doc4.xml · derivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 131,691

Underlying: Common Stock · 2,800 shares

Expires 2025-06-15

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 31, 2018 Filed Aug 1, 2018 18:04 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 2,800 $6.35 $17,780.00
Disclosure

SEC source: 0000899243-18-021009 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,658

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
May 18, 2018 Filed May 21, 2018 21:01 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 10,000 $0.00 Strike: $6.35 $0.00
Disclosure

SEC source: 0000899243-18-013624 · doc4.xml · derivative · entry 3

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 134,491

Underlying: Common Stock · 10,000 shares

Expires 2025-06-15

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
May 18, 2018 Filed May 21, 2018 21:01 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 SaleCommon Stock 10,000 $70.00 $700,000.00
Disclosure

SEC source: 0000899243-18-013624 · doc4.xml · nonDerivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,858

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2018.

Read SEC document
May 18, 2018 Filed May 21, 2018 21:01 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Exercise / conversionCommon Stock 10,000 $6.35 $63,500.00
Disclosure

SEC source: 0000899243-18-013624 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,858

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.

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2018.

Read SEC document
March 01, 2018 Filed Mar 5, 2018 16:30 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 Tax withholdingCommon Stock 683 $62.24 $42,509.92
Disclosure

SEC source: 0000899243-18-006345 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,858

Read SEC document
February 27, 2018 Filed Mar 1, 2018 20:07 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 GrantEmployee Stock Option (right to buy) · Derivative 8,000 $0.00 Strike: $63.95 $0.00
Disclosure

SEC source: 0000899243-18-005998 · doc4.xml · derivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,000

Underlying: Common Stock · 8,000 shares

Expires 2028-02-27

F4 · derivative.exercise_date: The option vests and the shares become exercisable according to the following schedule: 1/4 on March 1, 2019 and 1/36 of the remaining shares on each full calendar month thereafter.

Read SEC document
February 27, 2018 Filed Mar 1, 2018 20:07 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 GrantCommon Stock 3,700 $0.00 $0.00
Disclosure

SEC source: 0000899243-18-005998 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,541

F1 · shares: The reported securities are represented by restricted stock units ("RSUs"), which represents a contingent right to receive one share of IRTC common stock. The RSUs vest in four equal annual installments beginning on March 1, 2019.

F2 · balance_after: Includes 1,182 shares acquired under the IRTC employee stock purchase plan on December 1, 2017.

F3 · balance_after: Includes 1,759 shares acquired under the IRTC employee stock purchase plan on June 1, 2017.

Read SEC document
February 16, 2017 Filed Feb 17, 2017 16:56 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 GrantEmployee Stock Option (right to buy) · Derivative 14,000 $0.00 Strike: $35.25 $0.00
Disclosure

SEC source: 0000899243-17-004550 · doc4.xml · derivative · entry 2

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,000

Underlying: Common Stock · 14,000 shares

Expires 2027-02-16

F1 · derivative.exercise_date: The option vests and the shares become exercisable according to the following schedule: 1/4 on March 1, 2018 and 1/36 of the remaining shares on each full calendar month thereafter.

Read SEC document
February 16, 2017 Filed Feb 17, 2017 16:56 UTC iRhythm Holdings, Inc. IRTC · Entity 1499 GrantCommon Stock 7,900 $0.00 $0.00
Disclosure

SEC source: 0000899243-17-004550 · doc4.xml · nonDerivative · entry 1

Sung Derrick · CIK 0001670118 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

F2 · shares: The reported securities are represented by restricted stock units ("RSUs"), which represents a contingent right to receive one share of IRTC common stock. The RSUs vest in four equal annual installments beginning on March 1, 2018.

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.