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CHANG KUO WEI HERBERT

Disclosed activity across 1 company

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19854
SEC CIK
0001192171

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MONOLITHIC POWER SYSTEMS, INC.MPWR · Entity 877DirectorAugust 24, 2026August 25, 2026

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.

MONOLITHIC POWER SYSTEMS, INC.

Report date August 24, 2026 · Filed August 25, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect515 Reported balance After 2026-08-24 transaction · row 1
1 source row

Row 1 · 2026-08-24 · Sale · Disposed 50 · Balance 515

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
August 24, 2026 Filed Aug 25, 2026 23:13 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 50 $1,281.57 $64,078.50
Disclosure

SEC source: 0001214659-26-010853 · marketforms-73899.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 515

Read SEC document
August 11, 2026 Filed Aug 13, 2026 21:23 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 50 $1,420.00 $71,000.00
Disclosure

SEC source: 0001214659-26-010101 · marketforms-73754.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 565

Read SEC document
February 03, 2026 Filed Feb 6, 2026 01:01 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 189 $0.00 $0.00
Disclosure

SEC source: 0001214659-26-001260 · marketforms-72038.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 615

F1 · shares: On February 3, 2026, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
November 25, 2025 Filed Nov 25, 2025 21:54 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $896.97 $89,697.00
Disclosure

SEC source: 0001214659-25-017235 · marketforms-71369.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 426

Read SEC document
November 21, 2025 Filed Nov 24, 2025 16:25 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $873.97 $87,397.00
Disclosure

SEC source: 0001214659-25-017110 · marketforms-71338.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 526

Read SEC document
May 13, 2025 Filed May 13, 2025 22:09 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 50 $738.00 $36,900.00
Disclosure

SEC source: 0001214659-25-007514 · marketforms-69446.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 626

Read SEC document
May 12, 2025 Filed May 13, 2025 00:24 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $698.00 $69,800.00
Disclosure

SEC source: 0001214659-25-007421 · marketforms-69442.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 676

Read SEC document
May 08, 2025 Filed May 9, 2025 22:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $650.00 $65,000.00
Disclosure

SEC source: 0001214659-25-007331 · marketforms-69398.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 776

Read SEC document
February 04, 2025 Filed Feb 6, 2025 20:57 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 335 $0.00 $0.00
Disclosure

SEC source: 0001214659-25-002114 · marketforms-67973.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 876

F1 · shares: On February 4, 2025, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
August 15, 2024 Filed Aug 15, 2024 20:10 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $898.00 $89,800.00
Disclosure

SEC source: 0001214659-24-014809 · marketforms-66784.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 541

Read SEC document
August 15, 2024 Filed Aug 15, 2024 20:10 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $888.88 $88,888.00
Disclosure

SEC source: 0001214659-24-014809 · marketforms-66784.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 641

Read SEC document
May 20, 2024 Filed May 22, 2024 22:09 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $750.00 $150,000.00
Disclosure

SEC source: 0001214659-24-009810 · marketforms-65985.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 741

Read SEC document
May 15, 2024 Filed May 15, 2024 22:52 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $740.00 $74,000.00
Disclosure

SEC source: 0001214659-24-009375 · marketforms-65895.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 941

Read SEC document
May 15, 2024 Filed May 15, 2024 22:52 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $730.00 $73,000.00
Disclosure

SEC source: 0001214659-24-009375 · marketforms-65895.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,041

Read SEC document
February 29, 2024 Filed Feb 29, 2024 23:10 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 250 $706.34 $176,585.00
Disclosure

SEC source: 0001214659-24-003785 · marketforms-64995.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,141

Read SEC document
February 22, 2024 Filed Feb 23, 2024 16:25 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 250 $750.00 $187,500.00
Disclosure

SEC source: 0001214659-24-003399 · marketforms-64855.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,391

Read SEC document
February 06, 2024 Filed Feb 8, 2024 16:29 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 348 $0.00 $0.00
Disclosure

SEC source: 0001214659-24-002143 · marketforms-64604.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,641

F1 · shares: On February 6, 2024, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
November 14, 2023 Filed Nov 15, 2023 22:40 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 400 $523.64 $209,456.00
Disclosure

SEC source: 0001214659-23-015229 · marketforms-63515.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,293

Read SEC document
November 13, 2023 Filed Nov 13, 2023 22:37 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $510.00 $51,000.00
Disclosure

SEC source: 0001214659-23-014897 · marketforms-63512.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,693

Read SEC document
August 29, 2023 Filed Aug 29, 2023 20:24 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 500 $500.00 $250,000.00
Disclosure

SEC source: 0001214659-23-011786 · marketforms-62416.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,793

Read SEC document
February 07, 2023 Filed Feb 9, 2023 00:52 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 470 $0.00 $0.00
Disclosure

SEC source: 0001214659-23-001843 · marketforms-59351.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,293

F1 · shares: On February 7, 2023, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

F2 · balance_after: Ending balance adjusted to remove 533 shares double counted on last Form 4.

Read SEC document
February 08, 2022 Filed Feb 9, 2022 23:59 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 542 $0.00 $0.00
Disclosure

SEC source: 0001214659-22-002136 · marketforms-55213.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,356

F1 · shares: On February 8, 2022, the Board of Directors approved the annual restricted stock unit grant of 542 shares to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
February 26, 2021 Filed Feb 26, 2021 22:55 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 300 $370.00 $111,000.00
Disclosure

SEC source: 0001280452-21-000039 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,281

Read SEC document
February 02, 2021 Filed Feb 5, 2021 00:51 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 533 $0.00 $0.00
Disclosure

SEC source: 0001280452-21-000014 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,581

F1 · shares: On February 2, 2021, the Nominating and Governance Committee of the Board of Directors approved the annual restricted stock unit grant of 533 shares to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
November 04, 2020 Filed Nov 5, 2020 21:02 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 3,000 $326.33 $978,999.00
Disclosure

SEC source: 0001437749-20-022772 · rdgdoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,048

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

F2 · price: The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $325.00 to $328.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
August 28, 2020 Filed Sep 1, 2020 20:46 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 1,300 $268.00 $348,400.00
Disclosure

SEC source: 0001280452-20-000153 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,048

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 12, 2020 Filed Aug 14, 2020 21:21 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $280.00 $56,000.00
Disclosure

SEC source: 0001280452-20-000141 · edgardoc.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,348

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 12, 2020 Filed Aug 14, 2020 21:21 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $279.00 $55,800.00
Disclosure

SEC source: 0001280452-20-000141 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,548

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 07, 2020 Filed Aug 10, 2020 22:27 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $283.00 $28,300.00
Disclosure

SEC source: 0001280452-20-000130 · edgardoc.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,748

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 06, 2020 Filed Aug 10, 2020 22:27 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 600 $280.00 $168,000.00
Disclosure

SEC source: 0001280452-20-000130 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,848

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

F2 · price: The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $279.00 to $281.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
August 05, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $277.00 $55,400.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 6

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,448

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 05, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $276.00 $55,200.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 5

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,648

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 05, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 200 $275.00 $55,000.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 4

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,848

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 04, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $275.00 $27,500.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 3

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,048

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 04, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 100 $274.00 $27,400.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,148

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
August 03, 2020 Filed Aug 5, 2020 21:53 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 476 $271.26 $129,120.00
Disclosure

SEC source: 0001280452-20-000125 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,248

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

F2 · price: The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $270.00 to $273.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Read SEC document
May 11, 2020 Filed May 12, 2020 21:23 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 2,000 $212.00 $424,000.00
Disclosure

SEC source: 0001280452-20-000088 · edgardoc.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,724

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
May 08, 2020 Filed May 12, 2020 21:23 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 1,026 $208.00 $213,408.00
Disclosure

SEC source: 0001280452-20-000088 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,724

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
May 05, 2020 Filed May 7, 2020 20:22 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 1,000 $198.00 $198,000.00
Disclosure

SEC source: 0001280452-20-000079 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,750

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
February 13, 2020 Filed Feb 14, 2020 22:17 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 1,000 $192.00 $192,000.00
Disclosure

SEC source: 0001280452-20-000049 · edgardoc.xml · nonDerivative · entry 2

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,750

F2 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
February 12, 2020 Filed Feb 14, 2020 22:17 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 1,048 $0.00 $0.00
Disclosure

SEC source: 0001280452-20-000049 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,750

F1 · shares: On February 12, 2020, the Nominating and Governance Committee of the Board of Directors approved the annual restricted stock unit grant of 1,048 shares to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.

Read SEC document
February 11, 2020 Filed Feb 12, 2020 22:21 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 SaleCommon Stock 1,000 $187.72 $187,717.00
Disclosure

SEC source: 0001280452-20-000035 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,702

F1 · kind: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance Program.

Read SEC document
February 11, 2019 Filed Feb 12, 2019 22:59 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 1,339 $0.00 $0.00
Disclosure

SEC source: 0001280452-19-000016 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,702

F1 · shares: According to the Company's 2014 Equity Incentive Plan and the Board Compensation Schedule as adopted by the Board on February 11, 2019, each Outside Director will be automatically granted Restricted Stock Units as of such date, if he or she will have served on the Board for at least the preceding six (6) months, with such grant to be effective as of the date of the meeting of the Board or Compensation Committee, as applicable, subject to the Outside Director's continued service to the Board through such date. 100% of the restricted stock units shall vest on the first anniversary of the Vesting Commencement Date.

Read SEC document
February 07, 2018 Filed Feb 10, 2018 00:06 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 1,590 $0.00 $0.00
Disclosure

SEC source: 0001280452-18-000030 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,363

F1 · shares: According to the Company's 2014 Equity Incentive Plan and the Board Compensation Schedule as adopted by the Board on February 7, 2018, each Outside Director will be automatically granted Restricted Stock Units as of such date, if he or she will have served on the Board for at least the preceding six (6) months, with such grant to be effective as of the date of the meeting of the Board or Compensation Committee, as applicable, subject to the Outside Director's continued service to the Board through such date. 100% of the restricted stock units shall vest on the first anniversary of the Vesting Commencement Date.

Read SEC document
February 07, 2017 Filed Feb 9, 2017 00:55 UTC MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 GrantCommon Stock 1,566 $0.00 $0.00
Disclosure

SEC source: 0001280452-17-000023 · edgardoc.xml · nonDerivative · entry 1

CHANG KUO WEI HERBERT · CIK 0001192171 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,773

F1 · shares: According to the Company's 2014 Equity Incentive Plan and the Board Compensation Schedule as adopted by the Board on February 7, 2017, each Outside Director will be automatically granted Restricted Stock Units as of such date, if he or she will have served on the Board for at least the preceding six (6) months, with such grant to be effective as of the date of the meeting of the Board or Compensation Committee, as applicable, subject to the Outside Director's continued service to the Board through such date. 100% of the restricted stock units shall vest on the first anniversary of the Vesting Commencement 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.