MGNI Magnite, Inc.

NASDAQ
$23.97

Magnite, Inc. (MGNI) 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
-7.14
13 buyers / 15 sellers
MIXED
Funds compared
29
funds with comparable MGNI positions
24 current holders · 21 prior-quarter holders
Net share change
-2.29M
+2.72M added, -5.01M cut
Position activity
8 new 5 increased 10 reduced 5 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
Alyeska Investment Group, L.P. New +326.8K — $6.2M 0.0% 58
D. E. Shaw & Co., Inc. Quant New +35.7K — $677.9K 0.0% 58
Holocene Advisors, LP Sold Out -102.0K -100.0% $1.9M 0.0% 58
Tudor Investment Corporation Macro Sold Out -73.6K -100.0% $1.4M 0.0% 56
Gotham Asset Management, LLC Quant Value Sold Out -12.9K -100.0% $244.6K 0.0% 54
Qube Research & Technologies Ltd Quant Increased +1.29M +195.9% $24.6M 0.0% 53
Trexquant Investment Quant New +333.4K — $6.3M 0.0% 53
Quadrature Capital Quant New +19.1K — $363.4K 0.0% 52
MARSHALL WACE, LLP Long/Short Increased +299.4K +705.0% $5.7M 0.0% 52
Jain Global Long/Short Quant New +40.5K — $768.8K 0.0% 52

Most significant buyers

By move score, not size.

  • Alyeska Investment Group, L.P. New · +326.8K
  • D. E. Shaw & Co., Inc. New · +35.7K
  • Qube Research & Technologies Ltd Increased · +1.29M
  • Trexquant Investment New · +333.4K
  • Quadrature Capital New · +19.1K

Most significant sellers

By move score, not size.

  • Holocene Advisors, LP Sold Out · -102.0K
  • Tudor Investment Corporation Sold Out · -73.6K
  • Gotham Asset Management, LLC Sold Out · -12.9K
  • Brevan Howard Capital Management Sold Out · -133.2K
  • TWO SIGMA INVESTMENTS, LP Reduced · -352.2K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Alyeska Investment Group, L.P. 2 326.8K 0 +326.8K — 0.0% New 58
D. E. Shaw & Co., Inc. 1 35.7K 0 +35.7K — 0.0% New 58
Holocene Advisors, LP 2 0 102.0K -102.0K -100.0% 0.0% Sold Out 58
Tudor Investment Corporation 2 0 73.6K -73.6K -100.0% 0.0% Sold Out 56
Gotham Asset Management, LLC 2 0 12.9K -12.9K -100.0% 0.0% Sold Out 54
Qube Research & Technologies Ltd 2 2.0M 661.1K +1.29M +195.9% 0.0% Increased 53
Trexquant Investment 3 333.4K 0 +333.4K — 0.0% New 53
Quadrature Capital 3 19.1K 0 +19.1K — 0.0% New 52
MARSHALL WACE, LLP 2 341.9K 42.5K +299.4K +705.0% 0.0% Increased 52
Jain Global 3 40.5K 0 +40.5K — 0.0% New 52
Brevan Howard Capital Management 3 0 133.2K -133.2K -100.0% 0.0% Sold Out 51
Lighthouse Investment Partners 3 22.0K 0 +22.0K — 0.0% New 51
Winton Group 4 121.9K 0 +121.9K — 0.1% New 51
TWO SIGMA INVESTMENTS, LP 2 42.7K 394.9K -352.2K -89.2% 0.0% Reduced 50
Boothbay Fund Management 4 42.7K 0 +42.7K — 0.0% New 49
Centiva Capital 4 0 17.0K -17.0K -100.0% 0.0% Sold Out 48
Man Group 3 53.1K 664.0K -610.9K -92.0% 0.0% Reduced 48
CITADEL ADVISORS LLC 1 472.9K 1.1M -580.0K -55.1% 0.0% Reduced 45
Balyasny Asset Management L.P. 2 666.6K 1.5M -833.9K -55.6% 0.0% Reduced 44
ExodusPoint Capital Management 3 271.9K 149.2K +122.7K +82.2% 0.0% Increased 44
CenterBook Partners 4 117.6K 564.2K -446.6K -79.2% 0.1% Reduced 41
Schonfeld Strategic Advisors 3 562.2K 1.6M -1.04M -65.0% 0.1% Reduced 41
Caption Management 3 145.6K 405.1K -259.5K -64.1% 0.1% Reduced 38
MILLENNIUM MANAGEMENT LLC 2 764.8K 1.2M -469.6K -38.0% 0.0% Reduced 38
Walleye Capital 3 2.4K 7.6K -5.2K -67.9% 0.0% Reduced 37
AQR Capital Management 3 176.6K 121.2K +55.4K +45.7% 0.0% Increased 33
Squarepoint Ops LLC 2 230.2K 300.9K -70.7K -23.5% 0.0% Reduced 31
Parallax Volatility Advisers 3 16.7K 13.1K +3.6K +27.5% 0.0% Increased 26
Senvest Management 2 224.1K 224.1K 0 +0.0% 0.1% Unchanged 21

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.