MPWR Monolithic Power Systems, Inc.

NASDAQ
$1,234.46

Monolithic Power Systems, Inc. (MPWR) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+62.79
35 buyers / 8 sellers
STRONG BUYING
Funds compared
43
funds with comparable MPWR positions
39 current holders · 22 prior-quarter holders
Net share change
+851.3K
+884.6K added, -33.3K cut
Position activity
21 new 14 increased 4 reduced 4 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
D1 Capital Partners L.P. New +85.1K — $117.6M 0.3% 70
SCGE Management Long/Short Growth New +18.3K — $25.3M 0.4% 66
MILLENNIUM MANAGEMENT LLC New +136.8K — $189.2M 0.1% 66
RENAISSANCE TECHNOLOGIES LLC Quant New +63.1K — $87.2M 0.1% 65
WORLDQUANT MILLENNIUM ADVISORS LLC Quant New +47.1K — $65.2M 0.2% 63
Quadrature Capital Quant New +45.0K — $62.2M 0.6% 62
Qube Research & Technologies Ltd Quant New +64.5K — $89.2M 0.1% 62
TWO SIGMA INVESTMENTS, LP Quant Increased +178.5K +1485.2% $246.7M 0.2% 60
LMR Partners Event Quant New +35.8K — $49.4M 0.6% 60
Voloridge Investment Management Quant New +29.9K — $41.4M 0.2% 58

Most significant buyers

By move score, not size.

  • D1 Capital Partners L.P. New · +85.1K
  • SCGE Management New · +18.3K
  • MILLENNIUM MANAGEMENT LLC New · +136.8K
  • RENAISSANCE TECHNOLOGIES LLC New · +63.1K
  • WORLDQUANT MILLENNIUM ADVISORS LLC New · +47.1K

Most significant sellers

By move score, not size.

  • Holocene Advisors, LP Sold Out · -2.3K
  • Capula Management Sold Out · -502
  • Bridgewater Associates Reduced · -8.8K
  • Lighthouse Investment Partners Sold Out · -838
  • Winton Group Sold Out · -1.5K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
D1 Capital Partners L.P. 1 85.1K 0 +85.1K — 0.3% New 70
SCGE Management 1 18.3K 0 +18.3K — 0.4% New 66
MILLENNIUM MANAGEMENT LLC 2 136.8K 0 +136.8K — 0.1% New 66
RENAISSANCE TECHNOLOGIES LLC 1 63.1K 0 +63.1K — 0.1% New 65
WORLDQUANT MILLENNIUM ADVISORS LLC 2 47.1K 0 +47.1K — 0.2% New 63
Quadrature Capital 3 45.0K 0 +45.0K — 0.6% New 62
Qube Research & Technologies Ltd 2 64.5K 0 +64.5K — 0.1% New 62
TWO SIGMA INVESTMENTS, LP 2 190.5K 12.0K +178.5K +1485.2% 0.2% Increased 60
LMR Partners 3 35.8K 0 +35.8K — 0.6% New 60
Voloridge Investment Management 2 29.9K 0 +29.9K — 0.2% New 58
CITADEL ADVISORS LLC 1 63.5K 13.5K +50.0K +369.9% 0.1% Increased 58
Holocene Advisors, LP 2 0 2.3K -2.3K -100.0% 0.0% Sold Out 58
Maverick Capital 2 593 0 +593 — 0.0% New 57
Capula Management 2 0 502 -502 -100.0% 0.0% Sold Out 56
Hudson Bay Capital Management 3 2.0K 0 +2.0K — 0.0% New 55
Moore Capital Management 3 6.3K 0 +6.3K — 0.3% New 55
Armistice Capital 3 2.2K 0 +2.2K — 0.1% New 55
Chilton Investment Company 2 334 0 +334 — 0.0% New 54
ExodusPoint Capital Management 3 3.2K 0 +3.2K — 0.0% New 54
Jain Global 3 770 0 +770 — 0.0% New 54
D. E. Shaw & Co., Inc. 1 3.0K 1.2K +1.8K +149.4% 0.0% Increased 54
Caxton Associates 3 400 0 +400 — 0.0% New 53
Bridgewater Associates 1 3.1K 11.9K -8.8K -74.1% 0.0% Reduced 53
Lighthouse Investment Partners 3 0 838 -838 -100.0% 0.0% Sold Out 53
Trexquant Investment 3 1.3K 0 +1.3K — 0.0% New 53
Woodline Partners LP 2 14.6K 1.9K +12.7K +680.5% 0.1% Increased 52
Boothbay Fund Management 4 1.2K 0 +1.2K — 0.0% New 51
Winton Group 4 0 1.5K -1.5K -100.0% 0.0% Sold Out 51
Man Group 3 37.1K 6.5K +30.6K +470.2% 0.1% Increased 50
Verition Fund Management 2 2.5K 263 +2.2K +854.8% 0.0% Increased 50
Readystate Asset Management 3 236 0 +236 — 0.0% New 50
Y-Intercept 4 18.1K 4.6K +13.4K +290.5% 0.5% Increased 49
Aquatic Capital Management 4 70 0 +70 — 0.0% New 48
Brevan Howard Capital Management 3 5.8K 341 +5.4K +1594.4% 0.1% Increased 46
MARSHALL WACE, LLP 2 1.8K 6.7K -4.9K -72.5% 0.0% Reduced 45
Walleye Capital 3 642 293 +349 +119.1% 0.0% Increased 45
Squarepoint Ops LLC 2 53.0K 32.4K +20.6K +63.6% 0.2% Increased 44
CenterBook Partners 4 568 222 +346 +155.9% 0.0% Increased 43
Voleon Capital Management 3 408 1.4K -1.0K -71.5% 0.0% Reduced 40
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 96.4K 73.7K +22.7K +30.8% 0.2% Increased 37
Balyasny Asset Management L.P. 2 1.1K 795 +320 +40.3% 0.0% Increased 36
AQR Capital Management 3 24.9K 38.4K -13.4K -35.0% 0.0% Reduced 32
Gotham Asset Management, LLC 2 23.9K 22.5K +1.4K +6.3% 0.1% Increased 27

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.