Insider · CIK 0001312593
Saria Tseng
officer
Files at MPWR (MONOLITHIC POWER SYSTEMS, INC.). First filing Nov 13, 2024, latest May 29, 2026.
In brief
Saria Tseng files SEC Form 4 as officer at MPWR (MONOLITHIC POWER SYSTEMS, INC.). Since Nov 13, 2024, Saria Tseng has reported 0 open-market buys worth $0 and 13 open-market sells worth $165M, the latest filed on May 29, 2026.
A track record needs three past buys with six months of prices behind them; Saria Tseng has 0, so none is measured yet.
The newest scored trade: sold $13M of MPWR on May 27, 2026, filed May 29, 2026, scored 55 (moderate). In the last 12 months: 0 buys worth $0 and 11 sells worth $151M.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 13
$0 bought, $165M sold
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.
MPWROct 9, 2026 · close 1,386
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 |
|---|---|---|---|---|---|
| 55Moderate | MONOLITHIC POWER SYSTEMS, INC. | $13M 7,565 shares | -5% | +147% from low-3% from high | |
| 55Moderate | MONOLITHIC POWER SYSTEMS, INC. | $7.9M 5,000 shares | -3% | +142% from low-4% from high | |
| 28Weak | MONOLITHIC POWER SYSTEMS, INC. | $12M 8,963 shares | -5% | +191% from low0% from high | |
| 28Weak | MONOLITHIC POWER SYSTEMS, INC. | $8.9M 7,636 shares | -4% | +161% from low-4% from high | |
| 28Weak | MONOLITHIC POWER SYSTEMS, INC. | $1.6M 1,400 shares | -1% | +148% from low-9% from high | |
| 33Weak | MONOLITHIC POWER SYSTEMS, INC. | $26M 25,674 shares | -13% | +121% from low-19% from high | |
| 60Notable | MONOLITHIC POWER SYSTEMS, INC. | $27M 22,875 shares | -10% | +172% from low0% from high | |
| 55Moderate | MONOLITHIC POWER SYSTEMS, INC. | $18M 20,000 shares | -10% | +100% from low-18% from high | |
| 60Notable | MONOLITHIC POWER SYSTEMS, INC. | $19M 20,000 shares | -11% | +104% from low-16% from high | |
| 35Weak | MONOLITHIC POWER SYSTEMS, INC. | $1.4M 1,300 shares | -1% | +137% from low0% from high | |
| 33Weak | MONOLITHIC POWER SYSTEMS, INC. | $17M 16,840 shares | -12% | +122% from low0% from high | |
| 35Weak | MONOLITHIC POWER SYSTEMS, INC. | $13M 14,510 shares | -9% | +102% from low-2% from high | |
| 50Moderate | MONOLITHIC POWER SYSTEMS, INC. | $663k 866 shares | -1% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| May 28, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 7,565 0.02% of outstanding | $13M | May 27, 2026 | $56M |
| May 22, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 5,000 0.01% of outstanding | $7.9M | May 22, 2026 | $48M |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 8,964 0.02% of outstanding | $12M | Apr 8, 2026 | $63M |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 7,636 0.02% of outstanding | $8.9M | Apr 6, 2026 | $54M |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 1,400 0.00% of outstanding | $1.6M | Apr 1, 2026 | $53M |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 25,674 0.05% of outstanding | $26M | Mar 30, 2026 | $27M |
| Feb 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS INC | 1,286 0.00% of outstanding | $1.5M | Feb 6, 2026 | $62M |
| Feb 4, 2026 | MPWR MONOLITHIC POWER SYSTEMS INC | 21,590 0.04% of outstanding | $25M | Feb 4, 2026 | $37M |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 20,000 0.04% of outstanding | $19M | Nov 26, 2025 | $110M |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 20,000 0.04% of outstanding | $18M | Nov 25, 2025 | $92M |
| Oct 30, 2025 | MPWR MONOLITHIC POWER SYSTEMS INC | 1,216 0.00% of outstanding | $1.3M | Oct 30, 2025 | $90M |
| Oct 28, 2025 | MPWR MONOLITHIC POWER SYSTEMS INC | 53,328 0.11% of outstanding | $59M | Oct 28, 2025 | $32M |
| Oct 24, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 1,301 0.00% of outstanding | $1.4M | Oct 24, 2025 | $30M |
| Oct 16, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 2,812 0.01% of outstanding | $2.9M | Oct 16, 2025 | $28M |
| Oct 15, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 14,028 0.03% of outstanding | $14M | Oct 15, 2025 | $13M |
| Sep 18, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | 14,510 0.03% of outstanding | $13M | Sep 18, 2025 | none |
| Feb 10, 2025 | MPWR MONOLITHIC POWER SYSTEMS INC | 2,172 0.00% of outstanding | $1.6M | Feb 10, 2025 | none |
| Nov 8, 2024 | MPWR MONOLITHIC POWER SYSTEMS INC | 2,172 0.00% of outstanding | $1.7M | Nov 8, 2024 | none |
Transactions
The newest 50 of 76 rows this insider has filed.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | GGift Common Stock | -2,000 | $0.00 | $0 | 142,218 | 41 d ago |
| Aug 31, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | GGift Common Stockindirect: C&T Family Trust | +2,000 | $0.00 | $0 | 2,000 | 41 d ago |
| May 27, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -7,565 | $1,700.00 | $13M | 144,218 | May 29, 2026 |
| May 22, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | GGift Common Stock | -200 | $0.00 | $0 | 156,783 | May 27, 2026 |
| May 22, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -5,000 | $1,586.43 | $7.9M | 151,783 | May 27, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -560 | $1,266.48 | $709k | 165,386 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -360 | $1,270.29 | $457k | 165,026 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -240 | $1,279.55 | $307k | 164,786 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -120 | $1,287.12 | $154k | 164,666 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -400 | $1,292.08 | $517k | 164,266 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -800 | $1,302.52 | $1.0M | 163,466 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -1,279 | $1,308.30 | $1.7M | 162,187 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -4,244 | $1,312.82 | $5.6M | 157,943 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -840 | $1,319.25 | $1.1M | 157,103 | Apr 10, 2026 |
| Apr 8, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -120 | $1,321.94 | $159k | 156,983 | Apr 10, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -244 | $1,139.96 | $278k | 173,338 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -556 | $1,144.42 | $636k | 172,782 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -480 | $1,149.05 | $552k | 172,302 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -560 | $1,159.62 | $649k | 171,742 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -684 | $1,165.66 | $797k | 171,058 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -2,036 | $1,170.38 | $2.4M | 169,022 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -1,680 | $1,176.35 | $2.0M | 167,342 | Apr 8, 2026 |
| Apr 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -1,396 | $1,179.50 | $1.6M | 165,946 | Apr 8, 2026 |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -576 | $1,131.24 | $652k | 174,406 | Apr 3, 2026 |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -184 | $1,132.15 | $208k | 174,222 | Apr 3, 2026 |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -160 | $1,134.14 | $181k | 174,062 | Apr 3, 2026 |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -188 | $1,135.91 | $214k | 173,874 | Apr 3, 2026 |
| Apr 1, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -292 | $1,136.99 | $332k | 173,582 | Apr 3, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -5,154 | $1,000.81 | $5.2M | 195,502 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -9,080 | $1,005.18 | $9.1M | 186,422 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -3,360 | $1,009.63 | $3.4M | 183,062 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -3,194 | $1,017.22 | $3.2M | 179,868 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -2,200 | $1,023.00 | $2.3M | 177,668 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -2,440 | $1,029.21 | $2.5M | 175,228 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -166 | $1,035.60 | $172k | 175,062 | Apr 1, 2026 |
| Mar 30, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock10b5-1 | -80 | $1,041.12 | $83k | 174,982 | Apr 1, 2026 |
| Feb 6, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -22,875 | $1,171.16 | $27M | 200,626 | Feb 10, 2026 |
| Feb 3, 2026 | MPWR MONOLITHIC POWER SYSTEMS, INC. | AGrant or award Common Stock | +57,170 | $0.00 | $0 | 223,501 | Feb 5, 2026 |
| Dec 24, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | GGift Common Stock | -1,000 | $0.00 | $0 | 166,331 | Dec 30, 2025 |
| Dec 24, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | GGift Common Stockindirect: C&T Discovery Foundation | +1,000 | $0.00 | $0 | 1,000 | Dec 30, 2025 |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -240 | $922.78 | $221k | 187,091 | Nov 28, 2025 |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -385 | $894.54 | $344k | 206,946 | Nov 28, 2025 |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -1,200 | $923.54 | $1.1M | 185,891 | Nov 28, 2025 |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -1,625 | $895.63 | $1.5M | 205,321 | Nov 28, 2025 |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -1,327 | $924.32 | $1.2M | 184,564 | Nov 28, 2025 |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -2,066 | $896.37 | $1.9M | 203,255 | Nov 28, 2025 |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -1,126 | $925.55 | $1.0M | 183,438 | Nov 28, 2025 |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -754 | $897.54 | $677k | 202,501 | Nov 28, 2025 |
| Nov 25, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -145 | $898.38 | $130k | 202,356 | Nov 28, 2025 |
| Nov 26, 2025 | MPWR MONOLITHIC POWER SYSTEMS, INC. | SOpen-market sale Common Stock | -10,360 | $926.02 | $9.6M | 173,078 | Nov 28, 2025 |
50 of 76 rows shown.
Questions about Saria Tseng
Answered from the filings on this page, as of the latest one.
Is Saria Tseng buying or selling?
In the last 12 months Saria Tseng reported 0 open-market buys worth $0 and 11 open-market sells worth $151M on SEC Form 4; the latest was sold $13M of MPWR on May 27, 2026. Grants, option exercises and tax withholding are not counted.
How did Saria Tseng's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Saria Tseng has 0.
Where does Saria Tseng file Form 4?
Saria Tseng has filed Form 4 at MPWR (MONOLITHIC POWER SYSTEMS, INC.) as EVP & General Counsel. 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.