Monolithic Power Systems Inc
$1,256.26-4.2%
+$46.1B
Net Activity
+209.36% total shares
Institutions Holding
1246
Popularity Rank
#335
Avg Weight
0.17%
Total Value
$67.3B
Market Cap
$60.7B
1246 institutions currently hold MPWR, with 635 net buyers and 550 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
550
Net Buying Institutions
635
Top 5 by Value
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Across its top 20 institutional holders, MPWR's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 6/100, avg. turnover score 38/100).
MPWR ranks #335 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
1246 institutions disclose a position in MPWR, but none treat it as a major bet — even Rafferty Asset Management, LLC, its most concentrated holder, allocates just 1.4% of its own portfolio to it.
Fidelity has added to its MPWR position for two straight quarters, increasing it by $3.6B to reach $7.2B today.
Wellington Management Group LLP has trimmed its MPWR position for two straight quarters, cutting it by $249.2M while still holding $99.5M.
MPWR is down 4.2% today, but institutions show net buying of $46.1B this quarter — a divergence between today's price move and the underlying institutional flow.
MPWR posted net income of $806.0M over the trailing twelve months, and currently trades at a P/E of 75.3.
+$10.5B
Total Buy Value
$6.3B
Total Sell Value
635
Net Buyers
550
Net Sellers
MPWR
Q2 2026
Top 5 Institutional Movers
MPWR does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | Kuo Wei Herbert Chang | 2026-08-24 | $64K |
| Sell | Robert W Dean II | 2026-08-24 | $42K |
| Sell | Robert W Dean II | 2026-08-17 | $8K |
| Sell | Kuo Wei Herbert Chang | 2026-08-11 | $71K |
| Sell | Robert W Dean II | 2026-08-05 | $141K |
| Sell | Maurice Sciammas | 2026-08-03 | $40K |
| Sell | Maurice Sciammas | 2026-07-15 | $692K |
| Sell | Maurice Sciammas | 2026-07-15 | $361K |
| Action | Member | Trade Date | Amount |
|---|---|---|---|
| Buy | Markwayne Mullin Senate | 2026-02-04 | $15K–$50K |
| Buy | Markwayne Mullin Senate | 2026-01-05 | $15K–$50K |
| Buy | Markwayne Mullin Senate | 2026-01-05 | $15K–$50K |
| Sell (Full) | Thomas H Tuberville Senate | 2024-05-03 | $1K–$15K |
| Sell (Full) | Thomas H Tuberville Senate | 2024-05-03 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2023-10-17 | $1K–$15K |
| Sell (Partial) | Thomas H Tuberville Senate | 2023-04-03 | $1K–$15K |
| Sell (Partial) | Thomas H Tuberville Senate | 2023-04-03 | $1K–$15K |
5
Filings (90d)
$20.58M
Total Est. Value
15K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| DEAN ROBERT W II | 2026-08-24 | $42K |
| DEAN ROBERT W II | 2026-08-17 | $8K |
| Kuo Wei Chang | 2026-08-11 | $142K |
| ROBERT DEAN | 2026-08-05 | $141K |
| MAURICE SCIAMMAS | 2026-07-15 | $20.25M |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| FMR LLC | 13G/A | 2026-07-08 | 10.5% |
1
Filings (14d)
Monolithic Power Systems (MPWR) filed an 8-K on July 30, 2026, announcing that it had issued a press release with its financial results for the quarter ended June 30, 2026. The press release is attached as Exhibit 99.1. This filing is essentially a notice that the earnings report is out, and the excerpt does not include any actual revenue or profit figures.
View Full Filing (SEC EDGAR)609839105
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86
Articles
Is Monolithic Power Systems Inc (MPWR) a Bargain After 3.3% Drop? GF Value Says Undervalued
Monolithic Power Systems Company Profile & Introduction
Understanding the Setup: (MPWR) and Scalable Risk
Monolithic Surges 54% in Past Year: Should You Jump on the Bandwagon?
Monolithic Surges 54% in Past Year: Should You Jump on the Bandwagon?
Access MPWR's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/MPWRCLI
npx alphasmo stocks get MPWR