This is the public record of open-market stock transactions Saria Tseng has reported to the SEC on Form 4 as EVP & General Counsel of MONOLITHIC POWER SYSTEMS INC (MPWR). Every figure below is the reported share count multiplied by the reported price, so the dollar amounts are exact disclosed values rather than estimates. It is a record of what has been filed, not a portfolio or a recommendation, and insider selling in particular is routine and rarely a signal on its own.
Most of Saria Tseng's sales were pre-scheduled or tax-related rather than discretionary, which further weakens any read of them as a market call.
All 12 disclosed transactions, newest filing first.
How many shares has Saria Tseng bought and sold?
Saria Tseng has disclosed 12 Form 4 transactions in the record we track, from Sep 18, 2025 to May 27, 2026: 12 sales worth $164,165,495 and no open-market purchases. Each figure is the reported share count multiplied by the reported price, so these are exact disclosed amounts, not estimates.
Is Saria Tseng selling a bearish signal?
Not on its own. Insiders sell for many reasons that have nothing to do with a view on the stock — diversification, taxes, estate planning, or a pre-scheduled plan set up months earlier. Of the 12 sales on this record, 7 were made under a Rule 10b5-1 plan and 1 were automatic tax withholding on vesting shares, leaving 4 that were the insider's own discretionary decision (worth $57,405,604). Buying is the cleaner signal, because there is only one reason to buy. This page is a record, not a recommendation.
What is Saria Tseng's role?
Saria Tseng files as EVP & General Counsel of MONOLITHIC POWER SYSTEMS INC (MPWR). That role is taken from the Form 4 filings themselves. A Form 4 is filed with the SEC within two business days of an insider buying or selling their own company's stock.
What was Saria Tseng's largest single transaction?
The largest single transaction on record is a sell of 22,875 shares of MPWR at $1171.16, worth $26,790,370, filed Feb 10, 2026.
How current is this record?
The most recent Form 4 here was filed May 29, 2026. Insiders have two business days to file after a trade, so this is close to real time, but it is a record of what has been disclosed, not a statement of what Saria Tseng currently holds. Amounts are open-market and plan transactions reported on Form 4; grants and option exercises are not counted as buys.
Source: Form 4 filings submitted to the SEC, the same public documents behind our insider trading tracker. Figures are open-market and plan transactions only; grants and option exercises are not counted as buys. A disclosure is not evidence of a market view, and none of this is investment advice. See the full MPWR stock page for price, filings and coverage.