Company · Ownership research

MediaAlpha, Inc. MAX

CIK 0001818383 · CUSIP 58450V104

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 58450V104 (MAX), not CUSIP 58450V904 (MAX), CUSIP 58450V954 (MAX), and does not merge CUSIPs.

This page lists the top 20 of 165 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	WHITE MOUNTAINS INSURANCE GROUP LTD CIK 776867 · View history	$201.60M 17,856,614 shares	47.31%	0(0.00%)Unchanged	SEC filing ↗ Feb 12, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$40.91M 3,623,344 shares	0.00%	+169.65K(+4.90%)Added	SEC filing ↗ Feb 11, 2025	▾
03	BlackRock, Inc. CIK 2012383 · View history	$40.16M 3,557,049 shares	0.00%	-211.27K(-5.60%)Reduced	SEC filing ↗ Feb 7, 2025	▾
04	Broad Bay Capital Management, LP CIK 1759115 · View history	$25.05M 2,218,685 shares	4.05%	-248.78K(-10.10%)Reduced	SEC filing ↗ Feb 14, 2025	▾
05	TimesSquare Capital Management, LLC CIK 1313816 · View history	$18.39M 1,628,815 shares	0.27%	+712.41K(+77.70%)Added	SEC filing ↗ Feb 3, 2025	▾
06	Clearline Capital LP CIK 1600136 · View history	$13.41M 1,188,161 shares	1.78%	-53.26K(-4.30%)Reduced	SEC filing ↗ Feb 14, 2025	▾
07	Driehaus Capital Management LLC CIK 938206 · View history	$10.85M 960,757 shares	0.09%	-1.29M(-57.30%)Reduced	SEC filing ↗ Feb 14, 2025	▾
08	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$9.09M 804,930 shares	0.00%	+249.39K(+44.90%)Added	SEC filing ↗ Feb 11, 2025	▾
09	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$8.82M 781,349 shares	0.01%	+372.31K(+91.00%)Added	SEC filing ↗ Feb 14, 2025	▾
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$8.61M 762,575 shares	0.01%	-107.21K(-12.30%)Reduced	SEC filing ↗ Feb 12, 2025	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.89M 698,703 shares	0.00%	+8.13K(+1.20%)Added	SEC filing ↗ Feb 12, 2025	▾
12	Qube Research & Technologies Ltd CIK 1729829 · View history	$7.57M 670,153 shares	0.01%	-9.60K(-1.40%)Reduced	SEC filing ↗ Feb 14, 2025	▾
13	MORGAN STANLEY CIK 895421 · Amended · View history	$6.90M 611,061 shares	0.00%	-111.65K(-15.40%)Reduced	SEC filing ↗ May 15, 2025	▾
14	STATE STREET CORP CIK 93751 · View history	$6.84M 605,986 shares	0.00%	+58.08K(+10.60%)Added	SEC filing ↗ Feb 14, 2025	▾
15	Nuveen Asset Management, LLC CIK 1521019 · View history	$6.63M 587,627 shares	0.00%	-551.64K(-48.40%)Reduced	SEC filing ↗ Feb 14, 2025	▾
16	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$6.09M 539,300 shares	0.01%	+252.00K(+87.70%)Added	SEC filing ↗ Feb 13, 2025	▾
17	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$5.38M 476,342 shares	0.02%	+459.23K(+2,683.20%)Added	SEC filing ↗ Feb 14, 2025	▾
18	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$5.33M 472,215 shares	0.01%	+401.81K(+570.70%)Added	SEC filing ↗ Feb 14, 2025	▾
19	CenterBook Partners LP CIK 1872738 · View history	$5.33M 471,864 shares	0.32%	+391.30K(+485.70%)Added	SEC filing ↗ Feb 13, 2025	▾
20	LAZARD ASSET MANAGEMENT LLC CIK 1207017 · View history	$5.15M 456,550 shares	0.01%	+16.88K(+3.80%)Added	SEC filing ↗ Feb 14, 2025	▾

Showing 20 / 165 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

165

Cancelled or null records excluded

Disclosed shares

48,036,919

Not deduplicated across managers

Disclosed value

$542.31M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MediaAlpha, Inc. · Q4 2024

Explore all 165 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.