Saria Tseng Insider Trading Activity

Corporate InsiderVP · CIK 1312593

Total trades

$143.1M

Total volume

Apr 8, 2026

Last activity

MPWR

MONOLITHIC POWER SYSTEMS INC

Saria Tseng has been net-selling over the last 12 months with 0 purchases and 63 sales across 1 company.

MPWR is the most-traded position with 63 trades. The largest single transaction was a sale of MPWR for $26.8M on Feb 6, 2026.

Performance Scorecard

Forward stock performance after each transaction by Saria Tseng. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIOD	AVG BUY RETURN	AVG SELL AVOIDED	SUCCESS RATE	TRADES
30 days	—	-19.1%	8%	63
90 days	—	-21.0%	19%	63
120 days	—	-19.8%	0%	33

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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MPWR · MONOLITHIC POWER SYSTEMS INC

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Recent Trades

Showing the 50 most recent of 63 disclosed trades.

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
Apr 8, 2026	MPWR	Sell	4,244	$1312.82	$5.6M	−2.6%	VP
Apr 8, 2026	MPWR	Sell	1,279	$1308.30	$1.7M	−0.8%	VP
Apr 8, 2026	MPWR	Sell	800	$1302.52	$1.0M	−0.5%	VP
Apr 8, 2026	MPWR	Sell	400	$1292.08	$517K	−0.2%	VP
Apr 8, 2026	MPWR	Sell	120	$1287.12	$154K	−0.1%	VP
Apr 8, 2026	MPWR	Sell	240	$1279.55	$307K	−0.1%	VP
Apr 8, 2026	MPWR	Sell	360	$1270.29	$457K	−0.2%	VP
Apr 8, 2026	MPWR	Sell	840	$1319.25	$1.1M	−0.5%	VP
Apr 8, 2026	MPWR	Sell	560	$1266.48	$709K	−0.3%	VP
Apr 6, 2026	MPWR	Sell	556	$1144.42	$636K	−0.3%	VP
Apr 6, 2026	MPWR	Sell	480	$1149.05	$552K	−0.3%	VP
Apr 6, 2026	MPWR	Sell	560	$1159.62	$649K	−0.3%	VP
Apr 6, 2026	MPWR	Sell	684	$1165.66	$797K	−0.4%	VP
Apr 6, 2026	MPWR	Sell	2,036	$1170.38	$2.4M	−1.2%	VP
Apr 6, 2026	MPWR	Sell	1,680	$1176.35	$2.0M	−1.0%	VP
Apr 6, 2026	MPWR	Sell	1,396	$1179.50	$1.6M	−0.8%	VP
Apr 6, 2026	MPWR	Sell	244	$1139.96	$278K	−0.1%	VP
Apr 1, 2026	MPWR	Sell	184	$1132.15	$208K	−0.1%	VP
Apr 1, 2026	MPWR	Sell	160	$1134.14	$181K	−0.1%	VP
Apr 1, 2026	MPWR	Sell	188	$1135.91	$214K	−0.1%	VP
Apr 1, 2026	MPWR	Sell	292	$1136.99	$332K	−0.2%	VP
Apr 1, 2026	MPWR	Sell	576	$1131.24	$652K	−0.3%	VP
Mar 30, 2026	MPWR	Sell	5,154	$1000.81	$5.2M	−2.6%	VP
Mar 30, 2026	MPWR	Sell	3,360	$1009.63	$3.4M	−1.8%	VP
Mar 30, 2026	MPWR	Sell	9,080	$1005.18	$9.1M	−4.6%	VP
Mar 30, 2026	MPWR	Sell	3,194	$1017.22	$3.2M	−1.7%	VP
Mar 30, 2026	MPWR	Sell	2,200	$1023.00	$2.3M	−1.2%	VP
Mar 30, 2026	MPWR	Sell	2,440	$1029.21	$2.5M	−1.4%	VP
Mar 30, 2026	MPWR	Sell	166	$1035.60	$172K	−0.1%	VP
Mar 30, 2026	MPWR	Sell	80	$1041.12	$83K	−0.0%	VP
Feb 6, 2026	MPWR	Sell	22,875	$1171.16	$26.8M	−10.2%	VP
Nov 26, 2025	MPWR	Sell	2,238	$929.29	$2.1M	−1.3%	VP
Nov 26, 2025	MPWR	Sell	984	$928.60	$914K	−0.6%	VP
Nov 26, 2025	MPWR	Sell	1,845	$927.41	$1.7M	−1.1%	VP
Nov 26, 2025	MPWR	Sell	10,360	$926.02	$9.6M	−5.6%	VP
Nov 26, 2025	MPWR	Sell	1,126	$925.55	$1.0M	−0.6%	VP
Nov 26, 2025	MPWR	Sell	1,327	$924.32	$1.2M	−0.7%	VP
Nov 26, 2025	MPWR	Sell	1,200	$923.54	$1.1M	−0.6%	VP
Nov 26, 2025	MPWR	Sell	240	$922.78	$221K	−0.1%	VP
Nov 26, 2025	MPWR	Sell	680	$930.48	$633K	−0.4%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	240	$912.30	$219K	−0.1%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	385	$894.54	$344K	−0.2%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	1,625	$895.63	$1.5M	−0.8%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	2,066	$896.37	$1.9M	−1.0%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	754	$897.54	$677K	−0.4%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	145	$898.38	$130K	−0.1%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	320	$899.37	$288K	−0.2%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	346	$900.41	$312K	−0.2%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	880	$901.58	$793K	−0.4%	VP
Nov 25, 2025 Filed 3d late	MPWR	Sell	120	$902.07	$108K	−0.1%	VP