Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| MONOLITHIC POWER SYSTEMS, INC.MPWR · Entity 877 | EVP, WW Sales & Marketing | August 04, 2026 | August 07, 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 04, 2026 · Filed August 07, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 126,644 |
Reported balance
After 2026-08-04 transaction · row 1
1 source rowRow 1 · 2026-08-04 · Gift · Disposed 25,000 · Balance 126,644 F1: 25,000 shares were transferred from the reporting person's direct holdings to two GRATs, of which the reporting person is a trustee. No funds were exchanged and no sale of shares occurred in the transfer. |
| Common StockSEC Table I · non-derivative | IndirectVarious Sciammas GRATs | 36,062 |
Reported balance
After 2026-08-04 transaction · row 2
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 2 · 2026-08-04 · Gift · Acquired 25,000 · Balance 36,062 F2: 25,000 shares were received by two GRATs, of which the reporting person is a trustee, from the reporting person's direct holdings. No funds were exchanged and no sale of shares occurred in the transfer. |
| Common StockSEC Table I · non-derivative | IndirectThe Joseph Roger Sciammas 2020 Irrevocable Trust | 1,699 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 3
Holding and transaction disclosures are not merged.
1 source rowRow 3 · Balance 1,699 |
| Common StockSEC Table I · non-derivative | IndirectRosalind Sciammas Family 2021 Trust | 2,000 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 4
Holding and transaction disclosures are not merged.
1 source rowRow 4 · Balance 2,000 |
| Common StockSEC Table I · non-derivative | IndirectRosalind Sciammas Brokerage Account | 919 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 5
Holding and transaction disclosures are not merged.
1 source rowRow 5 · Balance 919 |
| Common StockSEC Table I · non-derivative | IndirectSciammas Family Trust | 52,586 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 6
Holding and transaction disclosures are not merged.
1 source rowRow 6 · Balance 52,586 |
| Common StockSEC Table I · non-derivative | IndirectThe Patrick Francis Sciammas 2020 Irrevocable Trust | 1,699 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 7
Holding and transaction disclosures are not merged.
1 source rowRow 7 · Balance 1,699 |
| Common StockSEC Table I · non-derivative | IndirectBy Sciammas Trust 2020 | 4,015 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 8
Holding and transaction disclosures are not merged.
1 source rowRow 8 · Balance 4,015 |
| Common StockSEC Table I · non-derivative | IndirectPeter Rafferty and Eric Toothill 2021Trust | 1,000 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 9
Holding and transaction disclosures are not merged.
1 source rowRow 9 · Balance 1,000 |
| Common StockSEC Table I · non-derivative | IndirectThe Chloe Liliane Sciammas 2020 Irrevocable Trust | 1,699 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 10
Holding and transaction disclosures are not merged.
1 source rowRow 10 · Balance 1,699 |
| Common StockSEC Table I · non-derivative | IndirectClement Sciammas Trust | 1,119 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 11
Holding and transaction disclosures are not merged.
1 source rowRow 11 · Balance 1,119 |
| Common StockSEC Table I · non-derivative | IndirectClement Sciammas Family 2021 Trust | 5,000 |
Reported balance
Holding disclosure · report date 2026-08-04 · row 12
Holding and transaction disclosures are not merged.
1 source rowRow 12 · Balance 5,000 |
Filing footnotes · ownership attribution and instrument terms
F1: 25,000 shares were transferred from the reporting person's direct holdings to two GRATs, of which the reporting person is a trustee. No funds were exchanged and no sale of shares occurred in the transfer.
F2: 25,000 shares were received by two GRATs, of which the reporting person is a trustee, from the reporting person's direct holdings. No funds were exchanged and no sale of shares occurred in the transfer.
Transaction history
JSON APIPurchases/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 date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,854 | $878.55 | $1,628,831.70 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 171,071 F4 · 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 $878.00 to $878.97. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,976 | $877.45 | $1,733,841.20 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 172,925 F3 · 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 $877.00 to $877.97. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 940 | $876.62 | $824,022.80 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 174,901 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 $876.28 to $876.97. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 431 | $875.26 | $377,237.06 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 175,841 F1 · 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 $875.01 to $875.95. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 731 | $874.50 | $639,259.50 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 12 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 176,272 F10 · 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 $874.09 to $874.90. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,146 | $873.78 | $1,001,351.88 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 11 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 177,003 F9 · 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 $873.49 to $873.97. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 574 | $872.80 | $500,987.20 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 10 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 178,149 F8 · 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 $872.74 to $872.89. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 220 | $871.45 | $191,719.00 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 9 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 178,723 F7 · 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 $871.39 to $871.64. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 320 | $870.36 | $278,515.20 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 8 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 178,943 F6 · 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 $870.07 to $870.98. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,842 | $869.39 | $1,601,416.38 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 7 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 179,263 F5 · 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 $869.00 to $869.91. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 723 | $868.42 | $627,867.66 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 6 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 181,105 F4 · 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 $868.00 to $868.94. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 699 | $867.57 | $606,431.43 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 5 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 181,828 F3 · 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 $867.04 to $867.98. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 339 | $866.19 | $293,638.41 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 182,527 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 $866.16 to $866.51. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 40 | $865.89 | $34,635.60 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 182,866 Read SEC document |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 160 | $863.86 | $138,217.60 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 182,906 Read SEC document |
| November 19, 2025 Filed Nov 20, 2025 21:47 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 240 | $862.58 | $207,019.20 |
DisclosureSEC source: 0001214659-25-017014 · marketforms-71316.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 183,066 F1 · 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 $862.25 to $862.75. 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 |
| November 13, 2025 Filed Nov 14, 2025 23:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 4,530 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-016758 · marketforms-71277.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Sciammas Family Trust Disclosed balance after: 49,460 F2 · shares: 4,530 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, and transferred from two GRATs, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| November 13, 2025 Filed Nov 14, 2025 23:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 4,530 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-016758 · marketforms-71277.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 26,660 F1 · shares: 4,530 shares were transferred from two GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| November 05, 2025 Filed Nov 6, 2025 23:53 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 200 | $986.81 | $197,362.00 |
DisclosureSEC source: 0001214659-25-016060 · marketforms-71222.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Rosalind Sciammas Brokerage Account Disclosed balance after: 1,299 Read SEC document |
| October 30, 2025 Filed Oct 31, 2025 20:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | Tax withholdingCommon Stock | 54,543 | $1,096.63 | $59,813,490.09 |
DisclosureSEC source: 0001214659-25-015707 · marketforms-71176.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 183,306 F1 · shares: The sales transaction reported in this Form 4 represents shares of common stock withheld by the Company to satisfy the income tax obligations in connection with the earnout and vesting of the market-based restricted stock units granted in October 2022, previously reported in a Form 4. Read SEC document |
| October 25, 2025 Filed Oct 29, 2025 01:35 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GrantCommon Stock | 135,520 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-015474 · marketforms-71131.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 237,849 F1 · shares: On October 25, 2022, the reporting person was granted market-based restricted stock units ("MSUs") subject to the achievement of five stock price targets and relative total stockholder return percentile rank over a three-year performance and vesting period. On October 25, 2025, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the MSUs, which resulted in 135,520 shares being awarded to the reporting person. All of the shares fully vested on October 25, 2025, pursuant to the grant agreement. F2 · balance_after: Ending balance includes 4 shares acquired on August 15, 2025 through the Company's qualified ESPP program. Read SEC document |
| August 19, 2025 Filed Aug 21, 2025 21:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,499 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-012568 · marketforms-70315.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Rosalind Sciammas Brokerage Account Disclosed balance after: 1,499 F3 · price: 1,499 shares were received by the Rosalind Sciammas brokerage account from Sciammas Siblings 2021 GRATs. No funds were exchanged, and no sale of shares occurred in the transfer Read SEC document |
| August 19, 2025 Filed Aug 21, 2025 21:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,499 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-012568 · marketforms-70315.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 12,228 F2 · price: 1,499 shares were distributed from the Sciammas Siblings 2021 GRATs, on which the reporting person is a Trustee, to the Rosalind Sciammas brokerage account. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| August 19, 2025 Filed Aug 21, 2025 21:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-012568 · marketforms-70315.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Peter Rafferty and Eric Toothill 2021Trust Disclosed balance after: 1,000 F1 · price: 1,000 shares were distributed from the Peter Rafferty and Eric Toothill 2021 Irrevocable Trust, on which the reporting person is a Trustee, to an individual who is not an immediate family member living in the same household of the reporting person. In addition, the Company has determined that the reporting person does not have any management or investment control or any other pecuniary interests over the shares. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 16:40 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,418 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-011728 · marketforms-70255.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Christina Sciammas Trust FBO Oski Crew Disclosed balance after: 9,481 F4 · price: 1,418 shares were transferred out of the Christina Sciammas 2022 Trust for Oski Crew, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 16:40 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,418 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-011728 · marketforms-70255.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Maurice Sciammas Trust FBO Oski Crew Disclosed balance after: 9,481 F3 · price: 1,418 shares were transferred out of the Maurice Sciammas 2022 Trust for Oski Crew, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 16:40 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 2,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-011728 · marketforms-70255.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 13,727 F2 · price: 2,000 shares were transferred out of two Sciammas 2022 GRATs and two Sciammas 2022 Siblings GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 16:40 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 4,836 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-011728 · marketforms-70255.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Sciammas Family Trust Disclosed balance after: 44,930 F1 · price: 4,836 shares were transferred to the Sciammas Family Trust, on which the reporting person is a Trustee, from two Sciammas 2022 GRATs, and two Sciammas 2022 Siblings GRATs, and two Sciammas 2022 Trusts for Oski Crew, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| May 28, 2025 Filed May 30, 2025 20:32 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,499 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-008580 · marketforms-69699.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Clement Sciammas (Sibling) Brokerage Account Disclosed balance after: 1,499 F2 · price: 1,499 shares were received by the Clement Sciammas brokerage account from the Sciammas Siblings 2021 GRATS. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| May 28, 2025 Filed May 30, 2025 20:32 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,499 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-008580 · marketforms-69699.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 15,727 F1 · price: 1,499 shares were distributed out of the Sciammas Siblings 2021 GRATs, on which the reporting person is a Trustee, to the Clement Sciammas brokerage account. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| May 12, 2025 Filed May 12, 2025 22:02 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 12,000 | $701.00 | $8,412,000.00 |
DisclosureSEC source: 0001214659-25-007417 · marketforms-69441.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · By Sciammas Trust 2020 Disclosed balance after: 4,015 Read SEC document |
| May 09, 2025 Filed May 9, 2025 23:55 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,878 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-007334 · marketforms-69413.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Sciammas Family Trust Disclosed balance after: 40,094 F2 · price: 1,878 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, from Siblings 2021 GRATS, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| May 09, 2025 Filed May 9, 2025 23:55 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,878 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-007334 · marketforms-69413.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 17,226 F1 · price: 1,878 shares were transferred out of the Siblings 2021 GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| February 18, 2025 Filed Feb 21, 2025 00:02 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,102 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-003203 · marketforms-68270.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Sciammas Family Trust Disclosed balance after: 38,216 F2 · shares: 1,102 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, transferred from Siblings 2021 GRATS, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| February 18, 2025 Filed Feb 21, 2025 00:02 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,102 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-003203 · marketforms-68270.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Various Sciammas GRATs Disclosed balance after: 19,104 F1 · shares: 1,102 shares were transferred from Siblings 2021 GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| February 11, 2025 Filed Feb 13, 2025 23:00 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 5,050 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-002586 · marketforms-68121.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Sciammas Family Trust Disclosed balance after: 37,114 F3 · shares: 5,050 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, transferred from a Maurice Sciammas GRAT for Oski Crew and a Christina Sciammas GRAT for Oski Crew, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| February 11, 2025 Filed Feb 13, 2025 23:00 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 2,525 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-002586 · marketforms-68121.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Christina Sciammas Trust FBO Oski Crew Disclosed balance after: 10,899 F2 · shares: 2,525 shares were transferred from a Christina Sciammas GRAT for Oski Crew, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| February 11, 2025 Filed Feb 13, 2025 23:00 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 2,525 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-25-002586 · marketforms-68121.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Maurice Sciammas Trust FBO Oski Crew Disclosed balance after: 10,899 F1 · shares: 2,525 shares were transferred from a Maurice Sciammas GRAT for Oski Crew, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| February 10, 2025 Filed Feb 12, 2025 20:44 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 662 | $717.10 | $474,720.60 |
DisclosureSEC source: 0001214659-25-002482 · marketforms-68078.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 102,301 F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan. Read SEC document |
| February 07, 2025 Filed Feb 11, 2025 22:33 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 200 | $704.92 | $140,983.00 |
DisclosureSEC source: 0001214659-25-002419 · marketforms-68073.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · By Sciammas Trust 2020 Disclosed balance after: 16,015 F4 · 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 $704.59 to $705.24. 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 |
| February 07, 2025 Filed Feb 11, 2025 22:33 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,259 | $703.88 | $886,183.91 |
DisclosureSEC source: 0001214659-25-002419 · marketforms-68073.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · By Sciammas Trust 2020 Disclosed balance after: 16,215 F3 · 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 $703.32 to $704.11. 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 |
| February 07, 2025 Filed Feb 11, 2025 22:33 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,600 | $702.46 | $1,123,936.96 |
DisclosureSEC source: 0001214659-25-002419 · marketforms-68073.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · By Sciammas Trust 2020 Disclosed balance after: 17,474 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 $702.04 to $702.93. 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 |
| February 07, 2025 Filed Feb 11, 2025 22:33 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 3,941 | $701.03 | $2,762,747.80 |
DisclosureSEC source: 0001214659-25-002419 · marketforms-68073.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · By Sciammas Trust 2020 Disclosed balance after: 19,074 F1 · 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 $701.00 to $701.96. 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 |
| November 08, 2024 Filed Nov 13, 2024 22:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 866 | $765.14 | $662,611.24 |
DisclosureSEC source: 0001214659-24-018888 · marketforms-67308.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 102,963 F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan. Read SEC document |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 200 | $935.00 | $187,000.00 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 11 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 103,829 F8 · balance_after: Ending balance includes 17 shares acquired on August 15, 2024 through the Company's qualified ESPP program. Read SEC document |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 2 | $933.16 | $1,866.32 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 10 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 104,012 Read SEC document |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,559 | $932.52 | $1,453,798.68 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 9 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 104,014 F7 · 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 $932.00 to $932.90. 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 |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 2,304 | $931.33 | $2,145,784.32 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 8 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 105,573 F6 · 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 $931.00 to $931.85. 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 |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 789 | $930.51 | $734,172.39 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 7 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 107,877 F5 · 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 $930.05 to $930.91. 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 |
| October 07, 2024 Filed Oct 8, 2024 17:14 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,774 | $929.55 | $1,649,021.70 |
DisclosureSEC source: 0001214659-24-017281 · marketforms-67148.xml · nonDerivative · entry 6 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 108,666 F4 · 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 $929.09 to $929.72. 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 |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.