Insider · CIK 0001445300
Robert W Dean II
Files at MPWR (MONOLITHIC POWER SYSTEMS INC). First filing May 20, 2026, latest May 28, 2026.
Robert W Dean II files SEC Form 4 as CFO at MPWR (MONOLITHIC POWER SYSTEMS INC). Since May 20, 2026, Robert W Dean II has reported 0 open-market buys worth $0 and 2 open-market sells worth $43k, the latest filed on May 28, 2026.
A track record needs three past buys with six months of prices behind them; Robert W Dean II has 0, so none is measured yet.
The newest scored trade: sold $36k of MPWR on May 26, 2026, filed May 28, 2026, scored 28 (weak). In the last 12 months: 0 buys worth $0 and 2 sells worth $43k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
MPWR: MONOLITHIC POWER SYSTEMS INC
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 28Weak | MPWRsell MONOLITHIC POWER SYSTEMS INC | $36k 22 shares | -0% | +153% from low0% from high | |
| 30Weak | MONOLITHIC POWER SYSTEMS INC | $6,253 4 shares | -0% | +126% from low-11% from high |
Transactions
Every row this insider has filed, 3 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 26, 2026 | MPWR MONOLITHIC POWER SYSTEMS INC | SOpen-market sale Common Stock | -22 | $1,649.56 | $36k | 5,878 | May 28, 2026 |
| May 18, 2026 | MPWR MONOLITHIC POWER SYSTEMS INC | SOpen-market sale Common Stock | -4 | $1,563.28 | $6,253 | 5,900 | May 20, 2026 |
| May 13, 2026 | MPWR MONOLITHIC POWER SYSTEMS INC | JOther Common Stock | -2,156 | $0.00 | $0 | 5,904 | May 15, 2026 |
Questions about Robert W Dean II
Answered from the filings on this page, as of the latest one.
Is Robert W Dean II buying or selling?
In the last 12 months Robert W Dean II reported 0 open-market buys worth $0 and 2 open-market sells worth $43k on SEC Form 4; the latest was sold $36k of MPWR on May 26, 2026. Grants, option exercises and tax withholding are not counted.
How did Robert W Dean II's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Robert W Dean II has 0.
Where does Robert W Dean II file Form 4?
Robert W Dean II has filed Form 4 at MPWR (MONOLITHIC POWER SYSTEMS INC) as Interim CFO. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.