Simplex Trading’s Monolithic Power Systems MPWR Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q4 | – | Sell |
-710
| Closed | -$683K | – | 9490 |
|
|
2025
Q3 | $653K | Buy |
710
+370
| +109% | +$300K | ﹤0.01% | 3511 |
|
|
2025
Q2 | $248K | Sell |
340
-811
| -70% | -$517K | ﹤0.01% | 4271 |
|
|
2025
Q1 | $667K | Buy |
+1,151
| New | +$725K | ﹤0.01% | 3084 |
|
|
2023
Q4 | – | Sell |
-1,573
| Closed | -$822K | – | 9437 |
|
|
2023
Q3 | $726K | Sell |
1,573
-3,378
| -68% | -$1.73M | ﹤0.01% | 3007 |
|
|
2023
Q2 | $2.67M | Buy |
4,951
+4,615
| +1,374% | +$2.19M | ﹤0.01% | 1738 |
|
|
2023
Q1 | $168K | Buy |
+336
| New | +$154K | ﹤0.01% | 4524 |
|
|
2021
Q2 | – | Sell |
-44
| Closed | -$15.5K | – | 10446 |
|
|
2021
Q1 | $15K | Sell |
44
-2,305
| -98% | -$839K | ﹤0.01% | 7667 |
|
|
2020
Q4 | $860K | Buy |
+2,349
| New | +$753K | ﹤0.01% | 2752 |
|
|
2020
Q1 | – | Sell |
-768
| Closed | -$132K | – | 8002 |
|
|
2019
Q4 | $136K | Buy |
+768
| New | +$123K | ﹤0.01% | 4169 |
|
|
2019
Q3 | – | Sell |
-2,418
| Closed | -$362K | – | 7648 |
|
|
2019
Q2 | $328K | Buy |
+2,418
| New | +$329K | ﹤0.01% | 2976 |
|
|
2018
Q3 | – | Sell |
-9
| Closed | -$1.25K | – | 7799 |
|
|
2018
Q2 | $1K | Sell |
9
-368
| -98% | -$46.9K | ﹤0.01% | 7172 |
|
|
2018
Q1 | $43K | Sell |
377
-537
| -59% | -$63.6K | ﹤0.01% | 2583 |
|
|
2017
Q4 | $102K | Buy |
+914
| New | +$106K | ﹤0.01% | 1787 |
|
|
2017
Q3 | – | Sell |
-1,764
| Closed | -$179K | – | 6345 |
|
|
2017
Q2 | $170K | Buy |
+1,764
| New | +$168K | 0.01% | 1303 |
|
|
2017
Q1 | – | Sell |
-229
| Closed | -$20.3K | – | 6543 |
|
|
2016
Q4 | $18K | Sell |
229
-2,525
| -92% | -$203K | ﹤0.01% | 3131 |
|
|
2016
Q3 | $221K | Buy |
2,754
+2,420
| +725% | +$179K | 0.02% | 962 |
|
|
2016
Q2 | $22K | Sell |
334
-1,522
| -82% | -$99.7K | ﹤0.01% | 2816 |
|
|
2016
Q1 | $118K | Buy |
1,856
+444
| +31% | +$26.5K | 0.01% | 1219 |
|
|
2015
Q4 | $89K | Buy |
1,412
+539
| +62% | +$33.5K | 0.01% | 1449 |
|
|
2015
Q3 | $44K | Buy |
+873
| New | +$43.3K | ﹤0.01% | 2098 |
|
|
2015
Q2 | – | Sell |
-2,168
| Closed | -$114K | – | 5598 |
|
|
2015
Q1 | $114K | Buy |
+2,168
| New | +$109K | 0.01% | 1021 |
|
Other funds holding MPWR
VCM
VPM
Simplex Trading's MPWR Position: Q4 2025 in Review
Simplex Trading sold out of Monolithic Power Systems (MPWR) in Q4 2025, closing a stake of 710 shares — an estimated $683K sold.
Simplex Trading first reported a position in MPWR in Q1 2015 and held it in 21 quarters. The position peaked at $2.67M in Q2 2023. 1,059 funds tracked by Wall St. Rank hold MPWR as of Q4 2025.
- Simplex Trading reported no remaining Monolithic Power Systems position as of Q4 2025 after selling out during the quarter.
- Simplex Trading sold 710 Monolithic Power Systems shares in Q4 2025, an estimated $683K.
- Simplex Trading first reported a position in Monolithic Power Systems in Q1 2015 and held it in 21 quarters.
- Simplex Trading's Monolithic Power Systems position peaked at $2.67M in Q2 2023.
- 1,059 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q4 2025.
Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.