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person · Reporting owner

Hu Chenming

Disclosed activity across 4 companies

Tapewire entity
75789
SEC CIK
0001316320

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
ACM Research, Inc.ACMR · Entity 3926DirectorMarch 17, 2025March 19, 2025
AMBARELLA INCAMBA · Entity 4248DirectorSeptember 08, 2026September 10, 2026
Fortinet, Inc.FTNT · Entity 2890DirectorSeptember 30, 2020October 01, 2020

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.

ACM Research, Inc.

Report date March 17, 2025 · Filed March 19, 2025

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Class A Common StockSEC Table I · non-derivativeDirect100,002 Reported balance After 2025-03-17 transaction · row 1
1 source row

Row 1 · 2025-03-17 · Sale · Disposed 163,308 · Balance 100,002

F1: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

Filing footnotes · ownership attribution and instrument terms

F1: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

AMBARELLA INC

Report date September 08, 2026 · Filed September 10, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Ordinary SharesSEC Table I · non-derivativeDirect32,667 Reported balance After 2026-09-08 transaction · row 1
1 source row

Row 1 · 2026-09-08 · Grant · Acquired 3,151 · Balance 32,667

F1: Effective as of September 8, 2026, the Board of Directors approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2026, so as to be 100% vested on September 15, 2027, subject to continued service with the Company.

Filing footnotes · ownership attribution and instrument terms

F1: Effective as of September 8, 2026, the Board of Directors approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2026, so as to be 100% vested on September 15, 2027, subject to continued service with the Company.

Fortinet, Inc.

Report date September 30, 2020 · Filed October 01, 2020

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect2,580 Reported balance After 2020-09-30 transaction · row 1
1 source row

Row 1 · 2020-09-30 · Exercise / conversion · Acquired 448 · Balance 2,580

F1: Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 20, 2020.

Restricted Stock UnitsSEC Table II · derivative / convertible security · Conversion / exercise price $0.00Direct1,344 Reported balance After 2020-09-30 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2020-09-30 · Exercise / conversion · Disposed 448 · Balance 1,344

F2: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F1: Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 20, 2020.

F3: The RSUs will vest in substantially equal increments on each of September 30, 2020, December 31, 2020, March 31, 2021, and the earlier of (i) June 30, 2021 and (ii) the date immediately preceding the Issuer's 2021 annual meeting of shareholders, subject to the Reporting Person's provision of services to the Issuer on each vesting date. Shares of the Issuer's Common Stock will be delivered to the Reporting Person following vesting.

F4: RSUs do not expire; they either vest or are canceled prior to vest date.

Filing footnotes · ownership attribution and instrument terms

F1: Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 20, 2020.

F2: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F3: The RSUs will vest in substantially equal increments on each of September 30, 2020, December 31, 2020, March 31, 2021, and the earlier of (i) June 30, 2021 and (ii) the date immediately preceding the Issuer's 2021 annual meeting of shareholders, subject to the Reporting Person's provision of services to the Issuer on each vesting date. Shares of the Issuer's Common Stock will be delivered to the Reporting Person following vesting.

F4: RSUs do not expire; they either vest or are canceled prior to vest date.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

INPHI Corp

Report date April 20, 2021 · Filed April 20, 2021

Section 16 reporting ended · disclosed 2021-04-20. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect1,478 Reported balance After 2021-04-20 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2021-04-20 · Disposition to issuer · Disposed 65,503 · Balance 1,478

F1: On April 20, 2021, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of October 29, 2020 (the "Merger Agreement") by and among by and among Marvell Technology Group Ltd., a Bermuda exempted company ("Marvell"), Marvell Technology, Inc. (f/k/a Maui HoldCo, Inc.), a Delaware corporation and a wholly owned subsidiary of Marvell ("HoldCo"), Maui Acquisition Company Ltd, a Bermuda exempted company and a wholly owned subsidiary of HoldCo ("Bermuda Merger Sub"), Indigo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of HoldCo ("Delaware Merger Sub"), and Inphi Corporation, a Delaware corporation ("Inphi"), Bermuda Merger Sub merged with and into Marvell with Marvell as the surviving corporation and a wholly owned subsidiary of Holdco (the "Bermuda Merger"),

F2: (continued from footnote 1) and Delaware Merger Sub merged with and into Inphi with Inphi as the surviving corporation and a wholly owned subsidiary of Holdco (the "Delaware Merger" and, together with the Bermuda Merger, the "Mergers"). At the effective time of the Mergers, the shares of Inphi Common Stock (the "Inphi Common Stock") were disposed pursuant to the Merger Agreement, whereby the outstanding Inphi Common Stock were automatically converted into the right to receive 2.323 shares of HoldCo Common Stock and $66.00 in cash, without interest (in addition to cash in lieu of fractional shares).

Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2021-04-20 transaction · row 2 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 2 · 2021-04-20 · Disposition to issuer · Disposed 1,478 · Balance 0

F3: Per the terms of the Merger Agreement, 1,478 RSUs that were outstanding and vested immediately prior to the effective time of the Mergers were cancelled in exchange for (subject to applicable withholding or other taxes), (i) an amount of cash equal to the product of (A) $66.00, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU, and (ii) a number of shares of HoldCo Common Stock equal to the product of (A) 2.323, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU.

Filing footnotes · ownership attribution and instrument terms

F1: On April 20, 2021, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of October 29, 2020 (the "Merger Agreement") by and among by and among Marvell Technology Group Ltd., a Bermuda exempted company ("Marvell"), Marvell Technology, Inc. (f/k/a Maui HoldCo, Inc.), a Delaware corporation and a wholly owned subsidiary of Marvell ("HoldCo"), Maui Acquisition Company Ltd, a Bermuda exempted company and a wholly owned subsidiary of HoldCo ("Bermuda Merger Sub"), Indigo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of HoldCo ("Delaware Merger Sub"), and Inphi Corporation, a Delaware corporation ("Inphi"), Bermuda Merger Sub merged with and into Marvell with Marvell as the surviving corporation and a wholly owned subsidiary of Holdco (the "Bermuda Merger"),

F2: (continued from footnote 1) and Delaware Merger Sub merged with and into Inphi with Inphi as the surviving corporation and a wholly owned subsidiary of Holdco (the "Delaware Merger" and, together with the Bermuda Merger, the "Mergers"). At the effective time of the Mergers, the shares of Inphi Common Stock (the "Inphi Common Stock") were disposed pursuant to the Merger Agreement, whereby the outstanding Inphi Common Stock were automatically converted into the right to receive 2.323 shares of HoldCo Common Stock and $66.00 in cash, without interest (in addition to cash in lieu of fractional shares).

F3: Per the terms of the Merger Agreement, 1,478 RSUs that were outstanding and vested immediately prior to the effective time of the Mergers were cancelled in exchange for (subject to applicable withholding or other taxes), (i) an amount of cash equal to the product of (A) $66.00, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU, and (ii) a number of shares of HoldCo Common Stock equal to the product of (A) 2.323, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU.

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
September 08, 2026 Filed Sep 10, 2026 21:36 UTC AMBARELLA INC AMBA · Entity 4248 GrantOrdinary Shares 3,151 $0.00 $0.00
Disclosure

SEC source: 0001280263-26-000065 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,667

F1 · shares: Effective as of September 8, 2026, the Board of Directors approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2026, so as to be 100% vested on September 15, 2027, subject to continued service with the Company.

Read SEC document
September 02, 2025 Filed Sep 4, 2025 18:44 UTC AMBARELLA INC AMBA · Entity 4248 GrantOrdinary Shares 2,498 $0.00 $0.00
Disclosure

SEC source: 0001280263-25-000040 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,516

F1 · shares: Effective as of September 2, 2025, the Board of Directors approved an annual restricted stock unit grant of 2,498 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2025, so as to be 100% vested on September 15, 2026, subject to continued service with the Company.

Read SEC document
March 17, 2025 Filed Mar 19, 2025 21:30 UTC ACM Research, Inc. ACMR · Entity 3926 SaleClass A Common Stock 163,308 $30.00 $4,899,240.00
Disclosure

SEC source: 0001140361-25-009529 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 100,002

F1 · kind: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

Read SEC document
August 29, 2024 Filed Aug 30, 2024 16:51 UTC AMBARELLA INC AMBA · Entity 4248 GrantOrdinary Shares 3,374 $0.00 $0.00
Disclosure

SEC source: 0001280263-24-000036 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,018

F1 · shares: Effective as of August 29, 2024, the Board of Directors approved an annual restricted stock unit grant of 3,374 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2024, so as to be 100% vested on September 15, 2025, subject to continued service with the Company.

Read SEC document
August 12, 2024 Filed Aug 20, 2024 21:00 UTC ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 20,000 $0.00 Strike: $18.89 $0.00
Disclosure

SEC source: 0001140361-24-037994 · form4.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2034-08-11

F1 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2025 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.

Read SEC document
August 31, 2023 Filed Sep 1, 2023 17:03 UTC AMBARELLA INC AMBA · Entity 4248 GrantOrdinary Shares 3,218 $0.00 $0.00
Disclosure

SEC source: 0001280263-23-000051 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,644

F1 · shares: Effective as of August 31, 2023, the Board of Directors approved an annual restricted stock unit grant of 3,218 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2023, so as to be 100% vested on September 15, 2024, subject to continued service with the Company.

Read SEC document
August 10, 2023 Filed Aug 14, 2023 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 24,000 $0.00 Strike: $13.24 $0.00
Disclosure

SEC source: 0001140361-23-039740 · form4.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,000

Underlying: Class A Common Stock · 24,000 shares

Expires 2033-08-09

F1 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2024 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.

Read SEC document
August 10, 2023 Filed Aug 21, 2023 21:18 UTC Amendment ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 24,000 $0.00 Strike: $13.89 $0.00
Disclosure

SEC source: 0001140361-23-040765 · form4.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,000

Underlying: Class A Common Stock · 24,000 shares

Expires 2033-08-09

F1 · derivative.exercise_price: This Form 4 amendment has been filed solely to correct the exercise price of the stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on August 14, 2023 (the "Form 4"). The exercise price was inadvertently stated as $13.24 in the Form 4. The exercise price should have been stated as $13.89 in the Form 4.

F2 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2024 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.

Read SEC document
June 15, 2023 Filed Jun 20, 2023 16:01 UTC AMBARELLA INC AMBA · Entity 4248 GrantOrdinary Shares 1,559 $0.00 $0.00
Disclosure

SEC source: 0001280263-23-000036 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,426

F1 · balance_after: The number of shares represented in column 4 was previously reported in Table II as restricted stock units.

Read SEC document
March 15, 2023 Filed Mar 17, 2023 16:54 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 779 $0.00 $0.00
Disclosure

SEC source: 0001280263-23-000012 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,559

Underlying: Ordinary Shares · 779 shares

Expires 2023-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

Read SEC document
March 15, 2023 Filed Mar 17, 2023 16:54 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 779 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-23-000012 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,867

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
December 16, 2022 Filed Dec 20, 2022 17:11 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 779 $0.00 $0.00
Disclosure

SEC source: 0001280263-22-000092 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,338

Underlying: Ordinary Shares · 779 shares

Expires 2023-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

Read SEC document
December 16, 2022 Filed Dec 20, 2022 17:11 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 779 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-22-000092 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,088

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
September 16, 2022 Filed Sep 20, 2022 16:55 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 377 $0.00 $0.00
Disclosure

SEC source: 0001280263-22-000082 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 377 shares

Expires 2022-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

Read SEC document
September 16, 2022 Filed Sep 20, 2022 16:55 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 377 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-22-000082 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,309

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
September 01, 2022 Filed Sep 2, 2022 17:06 UTC AMBARELLA INC AMBA · Entity 4248 GrantRestricted Stock Units · Derivative 3,117 $0.00 $0.00
Disclosure

SEC source: 0001280263-22-000070 · edgardoc.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,117

Underlying: Ordinary Shares · 3,117 shares

Expires 2023-09-15

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2022, so as to be 100% vested on September 15, 2023.

Read SEC document
June 30, 2022 Filed Jul 5, 2022 17:32 UTC ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 24,000 $0.00 Strike: $16.83 $0.00
Disclosure

SEC source: 0001140361-22-025087 · form4.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,000

Underlying: Class A Common Stock · 24,000 shares

Expires 2032-06-29

F1 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2023 annual meeting of stockholders of the issuer, subject to continued service through the vesting date.

Read SEC document
June 16, 2022 Filed Jun 17, 2022 18:19 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 377 $0.00 $0.00
Disclosure

SEC source: 0001280263-22-000064 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 377

Underlying: Ordinary Shares · 377 shares

Expires 2022-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

Read SEC document
June 16, 2022 Filed Jun 17, 2022 18:19 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 377 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-22-000064 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,932

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
March 16, 2022 Filed Mar 18, 2022 17:35 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 377 $0.00 $0.00
Disclosure

SEC source: 0001280263-22-000033 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 754

Underlying: Ordinary Shares · 377 shares

Expires 2022-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

Read SEC document
March 16, 2022 Filed Mar 18, 2022 17:35 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 377 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-22-000033 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,555

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
February 25, 2022 Filed Mar 1, 2022 20:14 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 5,555 $0.00 Strike: $38.92 $0.00
Disclosure

SEC source: 0001280263-22-000010 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,555 shares

Expires 2024-09-07

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 · derivative.exercise_date: The shares subject to the option vest at a rate of 1/12 per month following the vesting start date of September 8, 2014.

Read SEC document
February 25, 2022 Filed Mar 1, 2022 20:14 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 5,555 $38.92 $216,200.60
Disclosure

SEC source: 0001280263-22-000010 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,178

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
December 16, 2021 Filed Dec 17, 2021 17:35 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 377 $0.00 $0.00
Disclosure

SEC source: 0001280263-21-000149 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,131

Underlying: Ordinary Shares · 377 shares

Expires 2022-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

Read SEC document
December 16, 2021 Filed Dec 17, 2021 17:35 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 377 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-21-000149 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,623

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
September 22, 2021 Filed Sep 24, 2021 16:34 UTC AMBARELLA INC AMBA · Entity 4248 SaleOrdinary Shares 3,666 $160.00 $586,560.00
Disclosure

SEC source: 0001280263-21-000105 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,246

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 11, 2020.

Read SEC document
September 16, 2021 Filed Sep 17, 2021 17:22 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 959 $0.00 $0.00
Disclosure

SEC source: 0001280263-21-000098 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 959 shares

Expires 2021-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

Read SEC document
September 16, 2021 Filed Sep 17, 2021 17:22 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 959 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-21-000098 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,912

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
September 09, 2021 Filed Sep 10, 2021 17:37 UTC AMBARELLA INC AMBA · Entity 4248 SaleOrdinary Shares 4,000 $140.00 $560,000.00
Disclosure

SEC source: 0001280263-21-000082 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,953

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 11, 2020.

Read SEC document
September 02, 2021 Filed Sep 7, 2021 19:47 UTC AMBARELLA INC AMBA · Entity 4248 GrantRestricted Stock Units · Derivative 1,508 $0.00 $0.00
Disclosure

SEC source: 0001280263-21-000073 · edgardoc.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,508

Underlying: Ordinary Shares · 1,508 shares

Expires 2022-09-15

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2021, so as to be 100% vested on September 15, 2022.

Read SEC document
September 01, 2021 Filed Sep 2, 2021 16:57 UTC AMBARELLA INC AMBA · Entity 4248 SaleOrdinary Shares 4,000 $120.00 $480,000.00
Disclosure

SEC source: 0001280263-21-000072 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,953

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 11, 2020.

Read SEC document
June 16, 2021 Filed Jun 17, 2021 17:04 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 958 $0.00 $0.00
Disclosure

SEC source: 0001280263-21-000052 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 959

Underlying: Ordinary Shares · 958 shares

Expires 2021-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

Read SEC document
June 16, 2021 Filed Jun 17, 2021 17:04 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 958 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-21-000052 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,953

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
May 04, 2021 Filed May 6, 2021 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionStock Option · Derivative 23,334 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001140361-21-016252 · form4.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 23,334 shares

Expires 2026-12-27

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: On May 4, 2021, the reporting person exercised a previously issued stock option to purchase 23,334 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

Read SEC document
May 04, 2021 Filed May 6, 2021 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionClass A Common Stock 23,334 $3.00 $70,002.00
Disclosure

SEC source: 0001140361-21-016252 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,770

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: On May 4, 2021, the reporting person exercised a previously issued stock option to purchase 23,334 shares of Class A Common Stock of the Issuer.

Read SEC document
April 20, 2021 Filed Apr 20, 2021 20:25 UTC INPHI Corp IPHI · Entity 140160 Disposition to issuerCommon Stock 1,478 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-016473 · doc4.xml · nonDerivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F3 · shares: Per the terms of the Merger Agreement, 1,478 RSUs that were outstanding and vested immediately prior to the effective time of the Mergers were cancelled in exchange for (subject to applicable withholding or other taxes), (i) an amount of cash equal to the product of (A) $66.00, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU, and (ii) a number of shares of HoldCo Common Stock equal to the product of (A) 2.323, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU.

F3 · price: Per the terms of the Merger Agreement, 1,478 RSUs that were outstanding and vested immediately prior to the effective time of the Mergers were cancelled in exchange for (subject to applicable withholding or other taxes), (i) an amount of cash equal to the product of (A) $66.00, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU, and (ii) a number of shares of HoldCo Common Stock equal to the product of (A) 2.323, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU.

F3 · balance_after: Per the terms of the Merger Agreement, 1,478 RSUs that were outstanding and vested immediately prior to the effective time of the Mergers were cancelled in exchange for (subject to applicable withholding or other taxes), (i) an amount of cash equal to the product of (A) $66.00, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU, and (ii) a number of shares of HoldCo Common Stock equal to the product of (A) 2.323, multiplied by (B) the total number of shares of Inphi Common Stock subject to such RSU.

Read SEC document
April 20, 2021 Filed Apr 20, 2021 20:25 UTC INPHI Corp IPHI · Entity 140160 Disposition to issuerCommon Stock 65,503 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-016473 · doc4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,478

F1 · shares: On April 20, 2021, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of October 29, 2020 (the "Merger Agreement") by and among by and among Marvell Technology Group Ltd., a Bermuda exempted company ("Marvell"), Marvell Technology, Inc. (f/k/a Maui HoldCo, Inc.), a Delaware corporation and a wholly owned subsidiary of Marvell ("HoldCo"), Maui Acquisition Company Ltd, a Bermuda exempted company and a wholly owned subsidiary of HoldCo ("Bermuda Merger Sub"), Indigo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of HoldCo ("Delaware Merger Sub"), and Inphi Corporation, a Delaware corporation ("Inphi"), Bermuda Merger Sub merged with and into Marvell with Marvell as the surviving corporation and a wholly owned subsidiary of Holdco (the "Bermuda Merger"),

F2 · shares: (continued from footnote 1) and Delaware Merger Sub merged with and into Inphi with Inphi as the surviving corporation and a wholly owned subsidiary of Holdco (the "Delaware Merger" and, together with the Bermuda Merger, the "Mergers"). At the effective time of the Mergers, the shares of Inphi Common Stock (the "Inphi Common Stock") were disposed pursuant to the Merger Agreement, whereby the outstanding Inphi Common Stock were automatically converted into the right to receive 2.323 shares of HoldCo Common Stock and $66.00 in cash, without interest (in addition to cash in lieu of fractional shares).

F1 · price: On April 20, 2021, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of October 29, 2020 (the "Merger Agreement") by and among by and among Marvell Technology Group Ltd., a Bermuda exempted company ("Marvell"), Marvell Technology, Inc. (f/k/a Maui HoldCo, Inc.), a Delaware corporation and a wholly owned subsidiary of Marvell ("HoldCo"), Maui Acquisition Company Ltd, a Bermuda exempted company and a wholly owned subsidiary of HoldCo ("Bermuda Merger Sub"), Indigo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of HoldCo ("Delaware Merger Sub"), and Inphi Corporation, a Delaware corporation ("Inphi"), Bermuda Merger Sub merged with and into Marvell with Marvell as the surviving corporation and a wholly owned subsidiary of Holdco (the "Bermuda Merger"),

F2 · price: (continued from footnote 1) and Delaware Merger Sub merged with and into Inphi with Inphi as the surviving corporation and a wholly owned subsidiary of Holdco (the "Delaware Merger" and, together with the Bermuda Merger, the "Mergers"). At the effective time of the Mergers, the shares of Inphi Common Stock (the "Inphi Common Stock") were disposed pursuant to the Merger Agreement, whereby the outstanding Inphi Common Stock were automatically converted into the right to receive 2.323 shares of HoldCo Common Stock and $66.00 in cash, without interest (in addition to cash in lieu of fractional shares).

F1 · balance_after: On April 20, 2021, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of October 29, 2020 (the "Merger Agreement") by and among by and among Marvell Technology Group Ltd., a Bermuda exempted company ("Marvell"), Marvell Technology, Inc. (f/k/a Maui HoldCo, Inc.), a Delaware corporation and a wholly owned subsidiary of Marvell ("HoldCo"), Maui Acquisition Company Ltd, a Bermuda exempted company and a wholly owned subsidiary of HoldCo ("Bermuda Merger Sub"), Indigo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of HoldCo ("Delaware Merger Sub"), and Inphi Corporation, a Delaware corporation ("Inphi"), Bermuda Merger Sub merged with and into Marvell with Marvell as the surviving corporation and a wholly owned subsidiary of Holdco (the "Bermuda Merger"),

F2 · balance_after: (continued from footnote 1) and Delaware Merger Sub merged with and into Inphi with Inphi as the surviving corporation and a wholly owned subsidiary of Holdco (the "Delaware Merger" and, together with the Bermuda Merger, the "Mergers"). At the effective time of the Mergers, the shares of Inphi Common Stock (the "Inphi Common Stock") were disposed pursuant to the Merger Agreement, whereby the outstanding Inphi Common Stock were automatically converted into the right to receive 2.323 shares of HoldCo Common Stock and $66.00 in cash, without interest (in addition to cash in lieu of fractional shares).

Read SEC document
March 30, 2021 Filed Apr 1, 2021 19:39 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionStock Option · Derivative 10,000 $0.00 Strike: $3.00 $0.00
Disclosure

SEC source: 0001140361-21-011300 · form4.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,334

Underlying: Class A Common Stock · 10,000 shares

Expires 2026-12-27

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: On March 30, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

Read SEC document
March 30, 2021 Filed Apr 1, 2021 19:39 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionClass A Common Stock 10,000 $3.00 $30,000.00
Disclosure

SEC source: 0001140361-21-011300 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,436

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: On March 30, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 shares of Class A Common Stock of the Issuer.

Read SEC document
March 16, 2021 Filed Mar 18, 2021 17:02 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionRestricted Stock Units · Derivative 958 $0.00 $0.00
Disclosure

SEC source: 0001280263-21-000025 · edgardoc.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,917

Underlying: Ordinary Shares · 958 shares

Expires 2021-09-15

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

F2 · derivative.expiration_date: The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2020, so as to be 100% vested on September 15, 2021.

Read SEC document
March 16, 2021 Filed Mar 18, 2021 17:02 UTC AMBARELLA INC AMBA · Entity 4248 Exercise / conversionOrdinary Shares 958 Not disclosed Not disclosed
Disclosure

SEC source: 0001280263-21-000025 · edgardoc.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,995

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 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

Read SEC document
March 08, 2021 Filed Mar 8, 2021 19:13 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionStock Option · Derivative 12,334 $0.00 Strike: $7.50 $0.00
Disclosure

SEC source: 0001140361-21-007698 · form4.xml · derivative · entry 4

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 12,334 shares

Expires 2027-03-08

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.

F3 · kind: On March 8, 2021, the reporting person exercised a previously issued stock option to purchase 12,334 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

Read SEC document
March 08, 2021 Filed Mar 8, 2021 19:13 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionClass A Common Stock 12,334 $7.50 $92,505.00
Disclosure

SEC source: 0001140361-21-007698 · form4.xml · nonDerivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,436

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.

F3 · kind: On March 8, 2021, the reporting person exercised a previously issued stock option to purchase 12,334 shares of Class A Common Stock of the Issuer.

Read SEC document
March 04, 2021 Filed Mar 8, 2021 19:13 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionStock Option · Derivative 11,000 $0.00 Strike: $7.50 $0.00
Disclosure

SEC source: 0001140361-21-007698 · form4.xml · derivative · entry 3

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,334

Underlying: Class A Common Stock · 11,000 shares

Expires 2027-03-08

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: On March 4, 2021, the reporting person exercised a previously issued stock option to purchase 11,000 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

Read SEC document
March 04, 2021 Filed Mar 8, 2021 19:13 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionClass A Common Stock 11,000 $7.50 $82,500.00
Disclosure

SEC source: 0001140361-21-007698 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,102

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: On March 4, 2021, the reporting person exercised a previously issued stock option to purchase 11,000 shares of Class A Common Stock of the Issuer.

Read SEC document
March 02, 2021 Filed Mar 3, 2021 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionStock Option · Derivative 10,000 $0.00 Strike: $7.50 $0.00
Disclosure

SEC source: 0001140361-21-007223 · form4.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,334

Underlying: Class A Common Stock · 10,000 shares

Expires 2027-03-08

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: On March 2, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

Read SEC document
March 02, 2021 Filed Mar 3, 2021 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 Exercise / conversionClass A Common Stock 10,000 $7.50 $75,000.00
Disclosure

SEC source: 0001140361-21-007223 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,102

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: On March 2, 2021, the reporting person exercised a previously issued stock option to purchase 10,000 shares of Class A Common Stock of the Issuer.

Read SEC document
February 22, 2021 Filed Mar 3, 2021 17:30 UTC ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 5,000 $0.00 Strike: $119.98 $0.00
Disclosure

SEC source: 0001140361-21-007223 · form4.xml · derivative · entry 3

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Class A Common Stock · 5,000 shares

Expires 2031-02-21

F3 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2022 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date.

Read SEC document
February 22, 2021 Filed Mar 5, 2021 21:45 UTC Amendment ACM Research, Inc. ACMR · Entity 3926 GrantStock Option · Derivative 5,000 $0.00 Strike: $111.98 $0.00
Disclosure

SEC source: 0001140361-21-007575 · form4.xml · derivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Class A Common Stock · 5,000 shares

Expires 2031-02-21

F1 · derivative.exercise_price: This Form 4 amendment has been filed solely to correct the exercise price of a previously issued stock option to purchase shares of Class A Common Stock of the Issuer reported in a Form 4 filed on March 3, 2021 (the "Form 4"). The exercise price was inadvertently stated as $119.98 in the Form 4. The exercise price should have been stated as $111.98 in the Form 4.

F2 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2022 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date.

Read SEC document
February 12, 2021 Filed Feb 16, 2021 17:43 UTC ACM Research, Inc. ACMR · Entity 3926 SaleClass A Common Stock 10,000 $120.00 $1,200,000.00
Disclosure

SEC source: 0001140361-21-005063 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,102

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

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.