Theodore Blegen Insider Trading Activity

Corporate InsiderCFO · CIK 1415033

68

Total trades

$47.1M

Total volume

Feb 6, 2026

Last activity

MPWR

MONOLITHIC POWER SYSTEMS INC

Theodore Blegen has been net-selling over the last 12 months with 0 purchases and 68 sales across 1 company.

MPWR is the most-traded position with 68 trades. The largest single transaction was a sale of MPWR for $25.4M on Feb 6, 2026.

Performance Scorecard

Forward stock performance after each transaction by Theodore Blegen. 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.

PERIODAVG BUY RETURNAVG SELL AVOIDEDSUCCESS RATETRADES
30 days—-4.7%51%68
90 days—-18.6%0%68
120 days—-28.6%0%68

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

Price & Trades

Pro: Trade Markers

MPWR · MONOLITHIC POWER SYSTEMS INC

🔒 Subscribe to see trade entries

Pro members see exactly when Theodore Blegen bought and sold MPWR.

Upgrade to Pro

Recent Trades

Showing the 50 most recent of 68 disclosed trades.

DATETICKERTYPESHARESPRICEVALUEROLE
Feb 6, 2026MPWRSell21,725$1171.16$25.4MCFO
Feb 2, 2026MPWRSell220$1110.58$244KCFO
Feb 2, 2026MPWRSell40$1117.11$45KCFO
Feb 2, 2026MPWRSell80$1120.77$90KCFO
Feb 2, 2026MPWRSell200$1126.58$225KCFO
Feb 2, 2026MPWRSell240$1128.43$271KCFO
Feb 2, 2026MPWRSell320$1130.48$362KCFO
Feb 2, 2026MPWRSell198$1131.70$224KCFO
Feb 2, 2026MPWRSell322$1132.67$365KCFO
Feb 2, 2026MPWRSell379$1133.47$430KCFO
Feb 2, 2026MPWRSell241$1134.41$273KCFO
Feb 2, 2026MPWRSell120$1135.49$136KCFO
Jan 2, 2026MPWRSell80$927.61$74KCFO
Jan 2, 2026MPWRSell194$930.86$181KCFO
Jan 2, 2026MPWRSell40$934.74$37KCFO
Jan 2, 2026MPWRSell120$936.50$112KCFO
Jan 2, 2026MPWRSell460$938.52$432KCFO
Jan 2, 2026MPWRSell117$939.75$110KCFO
Jan 2, 2026MPWRSell406$941.60$382KCFO
Jan 2, 2026MPWRSell74$942.42$70KCFO
Jan 2, 2026MPWRSell539$943.71$509KCFO
Jan 2, 2026MPWRSell650$944.35$614KCFO
Dec 1, 2025MPWRSell40$899.73$36KCFO
Dec 1, 2025MPWRSell80$901.88$72KCFO
Dec 1, 2025MPWRSell120$904.38$109KCFO
Dec 1, 2025MPWRSell480$908.69$436KCFO
Dec 1, 2025MPWRSell1,984$909.00$1.8MCFO
Dec 1, 2025MPWRSell56$911.59$51KCFO
Nov 3, 2025MPWRSell204$1013.62$207KCFO
Nov 3, 2025MPWRSell135$1014.47$137KCFO
Nov 3, 2025MPWRSell80$1016.51$81KCFO
Nov 3, 2025MPWRSell6$1017.78$6KCFO
Nov 3, 2025MPWRSell180$1018.01$183KCFO
Nov 3, 2025MPWRSell181$1019.49$185KCFO
Nov 3, 2025MPWRSell160$1020.30$163KCFO
Nov 3, 2025MPWRSell168$1021.28$172KCFO
Nov 3, 2025MPWRSell40$1022.28$41KCFO
Nov 3, 2025MPWRSell291$1023.32$298KCFO
Nov 3, 2025MPWRSell208$1024.86$213KCFO
Nov 3, 2025MPWRSell43$1025.91$44KCFO
Nov 3, 2025MPWRSell200$1027.49$205KCFO
Nov 3, 2025MPWRSell240$1028.43$247KCFO
Nov 3, 2025MPWRSell246$1029.45$253KCFO
Nov 3, 2025MPWRSell210$1030.00$216KCFO
Nov 3, 2025MPWRSell17$1031.86$18KCFO
Nov 3, 2025MPWRSell184$1032.07$190KCFO
Nov 3, 2025MPWRSell47$1038.41$49KCFO
Oct 1, 2025MPWRSell6$902.61$5KCFO
Oct 1, 2025MPWRSell40$903.82$36KCFO
Oct 1, 2025MPWRSell60$904.00$54KCFO

Top Companies Traded

TICKERCOMPANYTRADESTOTAL VOLUME
MPWRMONOLITHIC POWER SYSTEMS INC68$47.1M

Other insiders at MONOLITHIC POWER SYSTEMS INC

7 other tracked filers at MPWR.

Michael Hsing

CEO

90

Trades

Saria Tseng

VP

63

Trades

Maurice Sciammas

VP

40

Trades

Elmiger Eugen J

Director

13

Trades

Lee Victor K

Director

8

Trades

Xiao Deming

VP

6

Trades

Zhou Jeff

Director

6

Trades