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Of the 15 tracked institutions holding MPWR, 9 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +3.7pt. It's a gauge of who owns the name, not just how many.
Among the 15 tracked institutional investors we monitor, MPWR (MONOLITHIC PWR SYS INC) is held with a combined value of $21.16B across 20,385,989 shares. The largest holder is BlackRock, Inc. with a position worth $6.64B (0.12% of their portfolio). 7 funds increased their holdings. 8 funds reduced their position.
Total Institutional Value
$21.16B
Total Shares Held
20,385,989
Institutional Holders
15
% of Shares Outstanding
41.5%
of 49.13M shares · SEC 2026-04-27
Days to Cover
2.7+11.0%
2.46M shares short · FINRA 2026-07-15
Tracked 13F institutions hold 41.5% of MPWR's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-27), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
5
$13.68M
Total Transactions
5
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Jul 15, 2026 | Maurice Sciammas | S | Sale | 527 | $692.49K |
| Jul 1, 2026 | Maurice Sciammas | S | Sale | 30 | $40.55K |
| Jun 1, 2026 | Maurice Sciammas | S | Sale | 30 | $46.02K |
| May 27, 2026 | Saria Tseng | S | Sale | 7,565 | $12.86M |
| May 26, 2026 | ROBERT W DEAN II | S | Sale | 22 | $36.29K |
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $6.64B | 0.12% | +1.8% |
| 2 | VANGUARD GROUP INC | $5.47B | 0.08% | -0.7% |
| 3 | FMR LLC | $4.81B | 0.25% | +10.7% |
| 4 | STATE STREET CORP | $2.40B | 0.08% | +0.4% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.38B | 0.16% | -25.3% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | $273.90M | 0.05% | -34.9% |
| 7 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $80.53M | 0.12% | -5.4% |
| 8 | AQR CAPITAL MANAGEMENT LLC | $40.23M | 0.02% | -17.1% |
| 9 | Gotham Asset Management, LLC | $24.58M | 0.08% | +11.5% |
| 10 | CITADEL ADVISORS LLC | $14.77M | 0.01% | +20.3% |
| Member | Type | Date |
|---|---|---|
| Byron Donalds | Sell | Jun 5, 2026 |
| Markwayne Mullin | Buy | Feb 4, 2026 |
| Markwayne Mullin | Buy | Jan 5, 2026 |
| Michael Patrick Guest | Buy |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of MPWR with a position worth $6.64B, representing 0.12% of their portfolio. In total, 15 institutional investors hold MPWR with a combined value of $21.16B.
Institutional investors hold $21.16B worth of MPWR stock across 15 positions. The largest institutional holder is BlackRock, Inc. with $6.64B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MPWR, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MPWR positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Oct 20, 2025 |
| Rob Bresnahan | Buy | Apr 8, 2025 |
| Rob Bresnahan | Sell | Jan 13, 2025 |
| Thomas H Tuberville | Sell | May 3, 2024 |
Last Close
$1,334
2026-07-24
YTD
+42.5%
64% of 52-week range
