Theodore Blegen
CIK 1415033 · View on SEC EDGAR ↗
Insider
First SEC filing: July 25, 2016 · Latest: July 25, 2016
On this page
Insider at
Insider transactions
0 buys (P)
92 sells (S)
Net:
$-42,634,700
+ 3 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
3 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 6, 2026 | MPWR | S | 21,725 | $1171.16 | $25,443,451 | 82,353 Direct | -20.87% | Disposed | 11.8% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 80 | $1139.49 | $91,159 | 65,333 Direct | -0.12% | Disposed | 14.9% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 80 | $1137.81 | $91,025 | 65,412 Direct | -0.12% | Disposed | 15.1% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 120 | $1136.35 | $136,362 | 65,492 Direct | -0.18% | Disposed | 15.2% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 120 | $1135.49 | $136,259 | 65,612 Direct | -0.18% | Disposed | 15.3% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 241 | $1134.41 | $273,393 | 65,732 Direct | -0.37% | Disposed | 15.4% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 379 | $1133.47 | $429,585 | 65,973 Direct | -0.57% | Disposed | 15.5% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 322 | $1132.67 | $364,720 | 66,352 Direct | -0.48% | Disposed | 15.6% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 198 | $1131.70 | $224,077 | 66,674 Direct | -0.30% | Disposed | 15.7% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 320 | $1130.48 | $361,754 | 66,872 Direct | -0.48% | Disposed | 15.8% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 240 | $1129.28 | $271,027 | 67,192 Direct | -0.36% | Disposed | 16.0% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 240 | $1128.43 | $270,823 | 67,432 Direct | -0.35% | Disposed | 16.0% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 80 | $1127.39 | $90,191 | 67,672 Direct | -0.12% | Disposed | 16.2% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 200 | $1126.58 | $225,316 | 67,752 Direct | -0.29% | Disposed | 16.2% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 40 | $1122.56 | $44,902 | 67,952 Direct | -0.06% | Disposed | 16.7% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 80 | $1120.77 | $89,662 | 67,992 Direct | -0.12% | Disposed | 16.8% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 40 | $1117.11 | $44,684 | 68,072 Direct | -0.06% | Disposed | 17.2% (price as of 2026-08-20) |
| Feb. 2, 2026 | MPWR | S 10b5-1 | 220 | $1110.58 | $244,328 | 68,112 Direct | -0.32% | Disposed | 17.9% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 80 | $935.33 | $74,826 | 70,858 Direct | -0.11% | Disposed | 40.0% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 80 | $946.62 | $75,730 | 68,332 Direct | -0.12% | Disposed | 38.3% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 40 | $945.00 | $37,800 | 68,412 Direct | -0.06% | Disposed | 38.6% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 650 | $944.35 | $613,828 | 68,452 Direct | -0.94% | Disposed | 38.7% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 539 | $943.71 | $508,660 | 69,102 Direct | -0.77% | Disposed | 38.8% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 74 | $942.42 | $69,739 | 69,641 Direct | -0.11% | Disposed | 38.9% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 406 | $941.60 | $382,290 | 69,715 Direct | -0.58% | Disposed | 39.1% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 40 | $940.03 | $37,601 | 70,121 Direct | -0.06% | Disposed | 39.3% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 117 | $939.75 | $109,951 | 70,161 Direct | -0.17% | Disposed | 39.3% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 460 | $938.52 | $431,719 | 70,278 Direct | -0.65% | Disposed | 39.5% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 120 | $936.50 | $112,380 | 70,738 Direct | -0.17% | Disposed | 39.8% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 40 | $934.74 | $37,390 | 70,938 Direct | -0.06% | Disposed | 40.1% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 80 | $933.64 | $74,691 | 70,978 Direct | -0.11% | Disposed | 40.3% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 194 | $930.86 | $180,587 | 71,058 Direct | -0.27% | Disposed | 40.7% (price as of 2026-08-20) |
| Jan. 2, 2026 | MPWR | S 10b5-1 | 80 | $927.61 | $74,209 | 71,252 Direct | -0.11% | Disposed | 41.2% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 56 | $911.59 | $51,049 | 71,332 Direct | -0.08% | Disposed | 43.6% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 1,984 | $909.00 | $1,803,456 | 71,388 Direct | -2.70% | Disposed | 44.1% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 480 | $908.69 | $436,171 | 73,372 Direct | -0.65% | Disposed | 44.1% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 80 | $907.59 | $72,607 | 73,852 Direct | -0.11% | Disposed | 44.3% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 80 | $906.84 | $72,547 | 73,932 Direct | -0.11% | Disposed | 44.4% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 120 | $904.38 | $108,526 | 74,012 Direct | -0.16% | Disposed | 44.8% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 40 | $902.31 | $36,092 | 74,132 Direct | -0.05% | Disposed | 45.1% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 80 | $901.88 | $72,150 | 74,172 Direct | -0.11% | Disposed | 45.2% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 40 | $900.88 | $36,035 | 74,252 Direct | -0.05% | Disposed | 45.4% (price as of 2026-08-20) |
| Dec. 1, 2025 | MPWR | S 10b5-1 | 40 | $899.73 | $35,989 | 74,292 Direct | -0.05% | Disposed | 45.5% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 47 | $1038.41 | $48,805 | 74,332 Direct | -0.06% | Disposed | 26.1% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 40 | $1035.25 | $41,410 | 74,379 Direct | -0.05% | Disposed | 26.5% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 40 | $1034.99 | $41,400 | 74,419 Direct | -0.05% | Disposed | 26.5% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 80 | $1033.00 | $82,640 | 74,459 Direct | -0.11% | Disposed | 26.8% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 184 | $1032.07 | $189,901 | 74,539 Direct | -0.25% | Disposed | 26.9% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 17 | $1031.86 | $17,542 | 74,723 Direct | -0.02% | Disposed | 26.9% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 210 | $1030.00 | $216,300 | 74,740 Direct | -0.28% | Disposed | 27.1% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 246 | $1029.45 | $253,245 | 74,950 Direct | -0.33% | Disposed | 27.2% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 240 | $1028.43 | $246,823 | 75,196 Direct | -0.32% | Disposed | 27.3% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 200 | $1027.49 | $205,498 | 75,436 Direct | -0.26% | Disposed | 27.4% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 43 | $1025.91 | $44,114 | 75,636 Direct | -0.06% | Disposed | 27.6% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 208 | $1024.86 | $213,171 | 75,679 Direct | -0.27% | Disposed | 27.8% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 291 | $1023.32 | $297,786 | 75,887 Direct | -0.38% | Disposed | 28.0% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 40 | $1022.28 | $40,891 | 76,178 Direct | -0.05% | Disposed | 28.1% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 168 | $1021.28 | $171,575 | 76,218 Direct | -0.22% | Disposed | 28.2% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 160 | $1020.30 | $163,248 | 76,386 Direct | -0.21% | Disposed | 28.3% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 181 | $1019.49 | $184,528 | 76,546 Direct | -0.24% | Disposed | 28.4% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 180 | $1018.01 | $183,242 | 76,727 Direct | -0.23% | Disposed | 28.6% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 6 | $1017.78 | $6,107 | 76,907 Direct | -0.01% | Disposed | 28.7% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 80 | $1016.51 | $81,321 | 76,913 Direct | -0.10% | Disposed | 28.8% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 135 | $1014.47 | $136,953 | 76,993 Direct | -0.18% | Disposed | 29.1% (price as of 2026-08-20) |
| Nov. 3, 2025 | MPWR | S 10b5-1 | 204 | $1013.62 | $206,778 | 77,128 Direct | -0.26% | Disposed | 29.2% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 160 | $917.17 | $146,747 | 37,940 Direct | -0.42% | Disposed | 42.8% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 580 | $916.37 | $531,495 | 38,099 Direct | -1.50% | Disposed | 42.9% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 440 | $915.43 | $402,789 | 38,679 Direct | -1.12% | Disposed | 43.0% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 390 | $914.71 | $356,737 | 39,119 Direct | -0.99% | Disposed | 43.2% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 138 | $913.87 | $126,114 | 39,509 Direct | -0.35% | Disposed | 43.3% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 676 | $912.73 | $617,005 | 39,647 Direct | -1.68% | Disposed | 43.5% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 65 | $911.27 | $59,233 | 40,323 Direct | -0.16% | Disposed | 43.7% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 80 | $909.52 | $72,762 | 40,388 Direct | -0.20% | Disposed | 44.0% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 250 | $907.36 | $226,840 | 40,468 Direct | -0.61% | Disposed | 44.3% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 115 | $905.37 | $104,118 | 40,718 Direct | -0.28% | Disposed | 44.6% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 60 | $904.00 | $54,240 | 40,833 Direct | -0.15% | Disposed | 44.9% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 40 | $903.82 | $36,153 | 40,893 Direct | -0.10% | Disposed | 44.9% (price as of 2026-08-20) |
| Oct. 1, 2025 | MPWR | S 10b5-1 | 6 | $902.61 | $5,416 | 40,933 Direct | -0.01% | Disposed | 45.1% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 126 | $822.59 | $103,646 | 40,939 Direct | -0.31% | Disposed | 59.2% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 200 | $821.75 | $164,350 | 41,065 Direct | -0.48% | Disposed | 59.4% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 200 | $820.70 | $164,140 | 41,265 Direct | -0.48% | Disposed | 59.6% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $818.44 | $81,844 | 41,465 Direct | -0.24% | Disposed | 60.0% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 574 | $816.47 | $468,654 | 41,565 Direct | -1.36% | Disposed | 60.4% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 400 | $815.39 | $326,156 | 42,139 Direct | -0.94% | Disposed | 60.6% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 200 | $814.75 | $162,950 | 42,539 Direct | -0.47% | Disposed | 60.7% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $813.09 | $81,309 | 42,739 Direct | -0.23% | Disposed | 61.1% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $812.84 | $81,284 | 42,839 Direct | -0.23% | Disposed | 61.1% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 500 | $811.45 | $405,725 | 42,939 Direct | -1.15% | Disposed | 61.4% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $808.53 | $80,853 | 43,439 Direct | -0.23% | Disposed | 62.0% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 200 | $806.57 | $161,314 | 43,539 Direct | -0.46% | Disposed | 62.4% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $804.64 | $80,464 | 43,739 Direct | -0.23% | Disposed | 62.7% (price as of 2026-08-20) |
| Sept. 2, 2025 | MPWR | S 10b5-1 | 100 | $803.43 | $80,343 | 43,839 Direct | -0.23% | Disposed | 63.0% (price as of 2026-08-20) |
| Aug. 1, 2025 | MPWR | S | 3,000 | $750.00 | $2,250,000 | 43,939 Direct | -6.39% | Disposed | 74.6% (price as of 2026-08-20) |
| July 1, 2025 | MPWR | S | 6,000 | $750.00 | $4,500,000 | 46,939 Direct | -11.33% | Disposed | 74.6% (price as of 2026-08-20) |
| Feb. 10, 2025 | MPWR | S | 532 | $717.10 | $381,497 | 52,912 Direct | -1.00% | Disposed | 82.6% (price as of 2026-08-20) |
| Dec. 9, 2024 | MPWR | S | 2,500 | $600.00 | $1,500,000 | 53,444 Direct | -4.47% | Disposed | 118.2% (price as of 2026-08-20) |
| Nov. 8, 2024 | MPWR | S | 734 | $765.15 | $561,620 | 55,944 Direct | -1.30% | Disposed | 71.1% (price as of 2026-08-20) |
Showing latest 100 of 513 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Feb. 2, 2021 | MPWR | Performance Shares | Common Stock (20,105) | — | — | 20,105 | Disposed |
| July 21, 2020 | MPWR | Performance Shares [F1] | Common Stock (20,105) | — | — | 20,105 | Acquired |
| Feb. 4, 2020 | MPWR | Restricted Stock Units | Common Stock (19,200) | — | — | 19,200 | Disposed |
| July 23, 2019 | MPWR | Restricted Stock Units | Common Stock (9,600) | — | — | 9,600 | Disposed |
| April 23, 2019 | MPWR | Restricted Stock Units | Common Stock (9,600) | — | — | 9,600 | Disposed |
| Oct. 25, 2018 | MPWR | Restricted Stock Units [F1] | Common Stock (48,000) | — | — | 48,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 25, 2016 | MPWR | Common Stock | 48,947 | Direct |