MAX MediaAlpha, Inc.

NYSE
$11.65

MediaAlpha, Inc. (MAX) Institutional Ownership

What the institutions did with MAX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
179
filed both this quarter and last
Managers holding
152
-7 on the quarter
Buyers
67
20 opened new
Sellers
93
27 sold out entirely
Buyer share
41.9%
of managers who traded it
Breadth
-16.3
net buyers, as a share of those trading

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

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
WHITE MOUNTAINS INSURANCE GROUP LTD 17.9M 36.7%
BlackRock, Inc. 3.4M 7.0%
Clearline Capital LP 2.7M 5.6%
JPMORGAN CHASE & CO 1.9M 3.9%
VANGUARD CAPITAL MANAGEMENT LLC 1.3M 2.6%
GEODE CAPITAL MANAGEMENT, LLC 1.1M 2.2%
Divisadero Street Capital Management, LP 1.0M 2.1%
JACOBS LEVY EQUITY MANAGEMENT, INC 971.2K 2.0%
ACADIAN ASSET MANAGEMENT LLC 957.1K 2.0%
JACOBS ASSET MANAGEMENT, LLC 919.8K 1.9%
STATE STREET CORP 862.2K 1.8%
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 830.0K 1.7%
MORGAN STANLEY 821.2K 1.7%
Nuveen, LLC 752.4K 1.5%
DIMENSIONAL FUND ADVISORS LP 701.9K 1.4%
J. Goldman & Co LP 598.1K 1.2%
CITADEL ADVISORS LLC 589.7K 1.2%
RENAISSANCE TECHNOLOGIES LLC 574.4K 1.2%
Shay Capital LLC 570.0K 1.2%
JANE STREET GROUP, LLC 551.6K 1.1%
D. E. Shaw & Co., Inc. 535.9K 1.1%
SPEECE THORSON CAPITAL GROUP INC 489.1K 1.0%
EVR Research LP 440.0K 0.9%
VANGUARD PORTFOLIO MANAGEMENT LLC 433.0K 0.9%
GOLDMAN SACHS GROUP INC 428.9K 0.9%

Largest changes

Manager Action Previous Current Change
Divisadero Street Capital Management, LP Increased 86.9K 1.0M +933.1K
J. Goldman & Co LP Reduced 1.2M 598.1K -584.6K
Philadelphia Financial Management of San Francisco, LLC Sold Out 480.0K 0 -480.0K
EVR Research LP New 0 440.0K +440.0K
CITADEL ADVISORS LLC Increased 229.3K 589.7K +360.4K
Qube Research & Technologies Ltd Reduced 415.3K 92.5K -322.8K
FRANKLIN RESOURCES INC Reduced 343.7K 74.6K -269.1K
JANE STREET GROUP, LLC Increased 283.0K 551.6K +268.6K
Pacer Advisors, Inc. Sold Out 258.3K 0 -258.3K
TWO SIGMA INVESTMENTS, LP Increased 175.3K 409.5K +234.2K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Reduced 1.1M 830.0K -232.0K
JACOBS LEVY EQUITY MANAGEMENT, INC Increased 750.1K 971.2K +221.2K
Shay Capital LLC Reduced 775.0K 570.0K -205.0K
GOLDMAN SACHS GROUP INC Reduced 623.4K 428.9K -194.6K
D. E. Shaw & Co., Inc. Increased 342.1K 535.9K +193.9K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced 189.7K 23.2K -166.5K
Y-Intercept (Hong Kong) Ltd Sold Out 158.2K 0 -158.2K
BNP PARIBAS FINANCIAL MARKETS Increased 56.2K 209.2K +153.0K
RENAISSANCE TECHNOLOGIES LLC Reduced 719.3K 574.4K -144.9K
JPMORGAN CHASE & CO Increased 1.7M 1.9M +134.4K
STIFEL FINANCIAL CORP New 0 126.2K +126.2K
Clearline Capital LP Increased 2.6M 2.7M +123.2K
UBS Group AG Reduced 153.9K 33.6K -120.3K
MORGAN STANLEY Increased 703.0K 821.2K +118.2K
VANGUARD PORTFOLIO MANAGEMENT LLC Reduced 546.7K 433.0K -113.7K
Caption Management, LLC Reduced 149.0K 37.5K -111.5K
ACADIAN ASSET MANAGEMENT LLC Increased 847.2K 957.1K +109.9K
VANGUARD CAPITAL MANAGEMENT LLC Reduced 1.4M 1.3M -109.4K
GSA CAPITAL PARTNERS LLP Sold Out 109.3K 0 -109.3K
BANK OF AMERICA CORP /DE/ Increased 279.7K 371.8K +92.1K
AQR CAPITAL MANAGEMENT LLC Reduced 482.0K 391.6K -90.3K
ALGERT GLOBAL LLC Increased 84.5K 170.9K +86.4K
BlackRock, Inc. Reduced 3.5M 3.4M -84.3K
DIMENSIONAL FUND ADVISORS LP Increased 620.7K 701.9K +81.2K
Walleye Capital LLC New 0 80.3K +80.3K
Stoic Point Capital Management LLC Increased 221.0K 297.2K +76.1K
WINMILL & CO. INC New 0 65.1K +65.1K
Nuveen, LLC Increased 701.4K 752.4K +51.0K
Hillsdale Investment Management Inc. New 0 45.9K +45.9K
Russell Investments Group, Ltd. Increased 84.9K 130.4K +45.5K
HRT FINANCIAL LP Increased 329.3K 372.9K +43.6K
State of Wyoming Sold Out 43.0K 0 -43.0K
STATE OF WISCONSIN INVESTMENT BOARD Reduced 106.2K 70.3K -35.9K
Triad Investment Management Increased 333.9K 368.7K +34.9K
Lighthouse Investment Partners, LLC New 0 34.0K +34.0K
TEACHER RETIREMENT SYSTEM OF TEXAS Increased 185.3K 216.4K +31.1K
Campbell & CO Investment Adviser LLC Increased 16.1K 46.6K +30.5K
Quantinno Capital Management LP Increased 107.3K 136.0K +28.8K
Brevan Howard Capital Management LP New 0 27.1K +27.1K
Bridgefront Capital, LLC Sold Out 26.2K 0 -26.2K
TUDOR INVESTMENT CORP ET AL New 0 25.7K +25.7K
FOX RUN MANAGEMENT, L.L.C. Reduced 37.0K 11.3K -25.6K
Vanguard Global Advisers, LLC Reduced 37.7K 12.3K -25.4K
XTX Topco Ltd Increased 146.8K 172.3K +25.4K
Cannell & Spears LLC Sold Out 25.4K 0 -25.4K
ALLSTATE CORP New 0 25.3K +25.3K
AXQ CAPITAL, LP New 0 25.1K +25.1K
GLOBEFLEX CAPITAL L P Reduced 80.2K 55.9K -24.4K
STATE STREET CORP Increased 838.2K 862.2K +24.1K
State of Alaska, Department of Revenue Increased 1.9K 25.9K +24.0K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.