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 |
|---|---|---|---|---|---|---|
| August 04, 2026 Filed Aug 7, 2026 00:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 25,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-009744 · marketforms-73704.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: 36,062 F2 · shares: 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. Read SEC document |
| August 04, 2026 Filed Aug 7, 2026 00:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 25,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-009744 · marketforms-73704.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 126,644 F1 · shares: 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. Read SEC document |
| August 03, 2026 Filed Aug 5, 2026 21:33 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,343.94 | $40,318.20 |
DisclosureSEC source: 0001214659-26-009676 · marketforms-73662.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,119 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Read SEC document |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 110 | $1,405.71 | $154,628.10 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 18 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 151,644 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F19 · 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 $1,404.25 to $1,406.04. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 117 | $1,400.45 | $163,852.65 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 17 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 151,754 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F18 · 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 $1,398.97 to $1,400.85. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 213 | $1,396.16 | $297,382.08 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 16 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 151,871 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F17 · 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 $1,393.94 to $1,398.92. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 50 | $1,388.19 | $69,409.50 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 15 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 152,084 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F16 · 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 $1,388.18 to $1,388.22. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 410 | $1,384.11 | $567,485.10 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 14 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 152,134 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F15 · 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 $1,381.79 to $1,386.22. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 418 | $1,378.73 | $576,309.14 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 13 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 152,544 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F14 · 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 $1,376.51 to $1,381.11. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 472 | $1,375.47 | $649,221.84 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 12 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 152,962 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F13 · 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 $1,371.23 to $1,376.20. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 240 | $1,369.18 | $328,603.20 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 11 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 153,434 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F12 · 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 $1,366.15 to $1,371.04. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 50 | $1,359.36 | $67,968.00 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 10 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 153,674 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F11 · 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 $1,357.88 to $1,362.57. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 5,640 | $1,352.95 | $7,630,638.00 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 9 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 153,724 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,352.13 to $1,357.03. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,506 | $1,348.91 | $2,031,458.46 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 8 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 159,364 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,347.09 to $1,352.00. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,864 | $1,344.16 | $2,505,514.24 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 7 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 160,870 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,341.99 to $1,346.96. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,460 | $1,339.59 | $1,955,801.40 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 6 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 162,734 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,336.97 to $1,341.96. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 776 | $1,334.59 | $1,035,641.84 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 5 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 164,194 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,331.95 to $1,336.95. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 464 | $1,329.30 | $616,795.20 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 164,970 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,326.94 to $1,331.90. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 409 | $1,323.93 | $541,487.37 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 165,434 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,321.72 to $1,326.11. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 274 | $1,318.42 | $361,247.08 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 165,843 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,316.56 to $1,321.56. 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 |
| July 15, 2026 Filed Jul 17, 2026 21:43 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 527 | $1,314.03 | $692,493.81 |
DisclosureSEC source: 0001214659-26-008703 · marketforms-73614.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 166,117 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,311.45 to $1,316.40 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 |
| July 01, 2026 Filed Jul 6, 2026 21:51 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,351.61 | $40,548.30 |
DisclosureSEC source: 0001214659-26-008236 · marketforms-73526.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,149 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Read SEC document |
| June 01, 2026 Filed Jun 3, 2026 21:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,533.95 | $46,018.50 |
DisclosureSEC source: 0001214659-26-007138 · marketforms-73342.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,179 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Read SEC document |
| May 29, 2026 Filed Jun 2, 2026 22:36 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 12,472 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-007088 · marketforms-73311.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: 12,625 F1 · price: The reported transaction involved distributions of securities from the various GRATs, of which the reporting person is a trustee, to individuals who are not immediate family members sharing the same household. No funds were exchanged and no sale of shares occurred in the distributions. Following the completion of the distributions, neither the GRATs nor the reporting person retains any pecuniary interest in the shares. Read SEC document |
| May 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 50 | $1,585.51 | $79,275.50 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 8 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 166,644 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,585.17 to $1,586.76. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 447 | $1,582.21 | $707,247.87 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 7 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 166,694 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,579.97 to $1,584.43. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 703 | $1,577.75 | $1,109,158.25 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 6 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 167,141 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,574.9 to $1,579.7. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,312 | $1,571.49 | $2,061,794.88 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 5 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 167,844 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,569.78 to $1,574.53. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 2,020 | $1,567.15 | $3,165,643.00 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 4 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 169,156 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,564.75 to $1,569.67. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 2,010 | $1,562.01 | $3,139,640.10 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 3 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 171,176 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,559.61 to $1,564.59. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,717 | $1,557.48 | $2,674,193.16 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 173,186 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,554.59 to $1,559.37. 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 15, 2026 Filed May 19, 2026 23:09 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 3,741 | $1,550.36 | $5,799,896.76 |
DisclosureSEC source: 0001214659-26-006583 · marketforms-73194.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 174,903 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. 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 $1,549.62 to $1,554.55. 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 13, 2026 Filed May 15, 2026 23:45 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,563 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-006521 · marketforms-73173.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: 51,023 F2 · shares: 1,563 shares were received by the Sciammas Family Trust, of which the reporting person is a Trustee, and transferred from three GRATs, of which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer. Read SEC document |
| May 13, 2026 Filed May 15, 2026 23:45 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GiftCommon Stock | 1,563 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-006521 · marketforms-73173.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: 25,097 F1 · shares: 1,563 shares were transferred from three GRATs, of which the reporting person is a Trustee, to the Sciammas Family Trust, of which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer. Read SEC document |
| May 05, 2026 Filed May 6, 2026 19:18 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 380 | $1,583.81 | $601,847.80 |
DisclosureSEC source: 0001214659-26-005668 · marketforms-73064.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Rosalind Sciammas Brokerage Account Disclosed balance after: 919 Read SEC document |
| May 04, 2026 Filed May 6, 2026 16:55 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,588.73 | $47,661.90 |
DisclosureSEC source: 0001214659-26-005640 · marketforms-73052.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,209 F1 · shares: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Read SEC document |
| April 01, 2026 Filed Apr 3, 2026 19:58 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,116.44 | $33,493.20 |
DisclosureSEC source: 0001214659-26-004332 · marketforms-72870.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,239 F1 · shares: These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. Read SEC document |
| March 20, 2026 Filed Mar 24, 2026 23:02 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 30 | $1,095.07 | $32,852.10 |
DisclosureSEC source: 0001214659-26-003765 · marketforms-72730.xml · nonDerivative · entry 2 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: Plan reported Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,269 F2 · shares: These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025. 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 $1,094.79 to $1,095.19. 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 11, 2026 Filed Feb 13, 2026 00:37 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 200 | $1,179.98 | $235,995.00 |
DisclosureSEC source: 0001214659-26-001626 · marketforms-72130.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Indirect · Clement Sciammas Trust Disclosed balance after: 1,299 Read SEC document |
| February 06, 2026 Filed Feb 10, 2026 23:57 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 22,875 | $1,171.16 | $26,790,369.64 |
DisclosureSEC source: 0001214659-26-001449 · marketforms-72092.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 178,625 F1 · shares: The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan. Read SEC document |
| February 03, 2026 Filed Feb 5, 2026 23:56 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GrantCommon Stock | 57,170 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-001252 · marketforms-72013.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 201,500 F1 · shares: On February 7, 2023, the reporting person was granted performance-based restricted stock units ("PSUs") subject to the achievement of performance conditions over a three-year performance period. On February 3, 2026, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the PSUs, which resulted in 57,170 shares being awarded to the reporting person, subject to tax withholdings. All of the shares fully vested and were released on February 3, 2026, pursuant to the grant agreement. Read SEC document |
| November 24, 2025 Filed Nov 25, 2025 21:31 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 3,976 | $895.23 | $3,559,434.48 |
DisclosureSEC source: 0001214659-25-017225 · marketforms-71358.xml · nonDerivative · entry 1 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 144,330 Read SEC document |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 810 | $886.01 | $717,668.10 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 12 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 148,306 F12 · 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 $886.00 to $886.15. 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 | 1,738 | $885.10 | $1,538,303.80 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 11 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 149,116 F11 · 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 $885.00 to $885.99. 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 | 2,149 | $884.44 | $1,900,661.56 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 10 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 150,854 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 $884.00 to $884.69. 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 | 6,513 | $883.50 | $5,754,235.50 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 9 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 153,003 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 $883.00 to $883.93. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 3,344 | $882.51 | $2,951,113.44 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 8 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 159,516 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 $882.06 to $882.92. 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 | 2,469 | $881.42 | $2,176,225.98 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 7 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 162,860 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 $881.01 to $881.93. 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 |
| November 19, 2025 Filed Nov 20, 2025 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 3,776 | $880.58 | $3,325,070.08 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 6 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 165,329 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 $880.07 to $880.94. 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 21:48 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 1,966 | $879.54 | $1,729,175.64 |
DisclosureSEC source: 0001214659-25-017016 · marketforms-71317.xml · nonDerivative · entry 5 Sciammas Maurice · CIK 0001360833 · EVP, WW Sales & Marketing 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 169,105 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 $879.25 to $879.99. 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.