Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| MONOLITHIC POWER SYSTEMS, INC.MPWR · Entity 877 | Interim CFO | August 24, 2026 | August 26, 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 26, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 7,089 |
Ending reported balance
After 2026-08-24 transaction · row 2
2 source rows · reconciled sequenceRow 1 · 2026-08-24 · Sale · Disposed 32 · Balance 7,094 F1: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units. F2: 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 $1,296.07 to $1,298.01. 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. Row 2 · 2026-08-24 · Other · Disposed 5 · Balance 7,089 F3: The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares. |
| Common StockSEC Table I · non-derivative | IndirectHeld by Parent & Daughter | 65 |
Reported balance
Holding disclosure · report date 2026-08-24 · row 3
Holding and transaction disclosures are not merged.
1 source rowRow 3 · Balance 65 |
Filing footnotes · ownership attribution and instrument terms
F1: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units.
F2: 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 $1,296.07 to $1,298.01. 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.
F3: The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares.
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 24, 2026 Filed Aug 26, 2026 23:22 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | OtherCommon Stock | 5 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-010932 · marketforms-73892.xml · nonDerivative · entry 2 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,089 F3 · price: The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares. Read SEC document |
| August 24, 2026 Filed Aug 26, 2026 23:22 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 32 | $1,297.72 | $41,527.04 |
DisclosureSEC source: 0001214659-26-010932 · marketforms-73892.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,094 F1 · shares: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units. 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 $1,296.07 to $1,298.01. 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 17, 2026 Filed Aug 20, 2026 00:44 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 6 | $1,413.64 | $8,481.84 |
DisclosureSEC source: 0001214659-26-010630 · marketforms-73781.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,126 F1 · shares: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units. Read SEC document |
| August 05, 2026 Filed Aug 6, 2026 22:20 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 105 | $1,344.27 | $141,148.35 |
DisclosureSEC source: 0001214659-26-009739 · marketforms-73703.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,132 Read SEC document |
| July 25, 2026 Filed Jul 28, 2026 22:42 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | GrantCommon Stock | 1,359 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-009117 · marketforms-72961.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,237 F1 · shares: On July 25, 2023, the reporting person was granted market-based restricted stock units ("MSUs") subject to the achievement of stock price targets and relative total stockholder return percentile rank over a three-year performance period. On July 25, 2026, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance conditions for the MSUs, which resulted in an award of 1,359 shares to the reporting person. 1/3 of the shares will vest on July 25, 2027, 1/3 of the shares will vest on July 25, 2028, and 1/3 of the shares will vest on July 25, 2029, pursuant to the grant agreement. Read SEC document |
| May 26, 2026 Filed May 28, 2026 23:46 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 22 | $1,649.56 | $36,290.32 |
DisclosureSEC source: 0001214659-26-006861 · marketforms-73221.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,878 F1 · shares: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units. 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 $1,647.84 to $1,650.16. 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 18, 2026 Filed May 20, 2026 22:52 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | SaleCommon Stock | 4 | $1,563.28 | $6,253.12 |
DisclosureSEC source: 0001214659-26-006622 · marketforms-72960.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,900 F1 · shares: The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units. Read SEC document |
| May 13, 2026 Filed May 15, 2026 20:15 UTC | MONOLITHIC POWER SYSTEMS, INC. MPWR · Entity 877 | OtherCommon Stock | 2,156 | $0.00 | $0.00 |
DisclosureSEC source: 0001214659-26-006498 · marketforms-73154.xml · nonDerivative · entry 1 DEAN ROBERT W II · CIK 0001445300 · Interim CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,904 F1 · price: The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares. 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.