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 150 rows by value; the complete set is available through the API.

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	$235.17M 17,856,614 shares	53.00%	-5.00M(-21.90%)Reduced	SEC filing ↗ Aug 8, 2024	▾
02	KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC CIK 1021223 · View history	$61.63M 4,679,669 shares	0.15%	-411.09K(-8.10%)Reduced	SEC filing ↗ Aug 13, 2024	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$40.58M 3,081,264 shares	0.00%	+962.08K(+45.40%)Added	SEC filing ↗ Aug 13, 2024	▾
04	BlackRock Inc. CIK 1364742 · View history	$32.69M 2,482,109 shares	0.00%	+742.15K(+42.70%)Added	SEC filing ↗ Aug 13, 2024	▾
05	Broad Bay Capital Management, LP CIK 1759115 · View history	$31.39M 2,383,209 shares	4.29%	+323.21K(+15.70%)Added	SEC filing ↗ Aug 14, 2024	▾
06	Driehaus Capital Management LLC CIK 938206 · Amended · View history	$18.92M 1,436,615 shares	0.18%	+970.84K(+208.40%)Added	SEC filing ↗ Aug 15, 2024	▾
07	TimesSquare Capital Management, LLC CIK 1313816 · View history	$14.13M 1,072,560 shares	0.22%	-16.33K(-1.50%)Reduced	SEC filing ↗ Aug 8, 2024	▾
08	MORGAN STANLEY CIK 895421 · Amended · View history	$9.88M 749,823 shares	0.00%	+499.96K(+200.10%)Added	SEC filing ↗ May 14, 2025	▾
09	Philadelphia Financial Management of San Francisco, LLC CIK 1351407 · View history	$9.60M 728,730 shares	2.23%	+728.73KNew	SEC filing ↗ Aug 14, 2024	▾
10	Divisadero Street Capital Management, LP CIK 1901865 · View history	$7.96M 604,106 shares	1.30%	+604.11KNew	SEC filing ↗ Aug 12, 2024	▾
11	EMERALD ADVISERS, LLC CIK 1015083 · View history	$7.88M 598,517 shares	0.33%	+597.36K(+51,407.50%)Added	SEC filing ↗ Aug 6, 2024	▾
12	Clearline Capital LP CIK 1600136 · View history	$7.60M 576,728 shares	0.66%	+534.18K(+1,255.30%)Added	SEC filing ↗ Aug 15, 2024	▾
13	Qube Research & Technologies Ltd CIK 1729829 · View history	$7.50M 569,194 shares	0.01%	+552.58K(+3,325.20%)Added	SEC filing ↗ Aug 14, 2024	▾
14	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.06M 535,937 shares	0.00%	+64.95K(+13.80%)Added	SEC filing ↗ Aug 9, 2024	▾
15	VOLORIDGE INVESTMENT MANAGEMENT, LLC CIK 1556921 · View history	$7.03M 533,703 shares	0.03%	+533.70KNew	SEC filing ↗ Aug 14, 2024	▾
16	STATE STREET CORP CIK 93751 · View history	$6.74M 511,946 shares	0.00%	+61.43K(+13.60%)Added	SEC filing ↗ Aug 14, 2024	▾
17	CITADEL ADVISORS LLC CIK 1423053 · View history	$6.46M 490,431 shares	0.01%	+154.19K(+45.90%)Added	SEC filing ↗ Aug 14, 2024	▾
18	Ghisallo Capital Management LLC CIK 1825214 · Amended · View history	$6.42M 487,500 shares	0.55%	+410.76K(+535.30%)Added	SEC filing ↗ Sep 4, 2024	▾
19	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$6.28M 477,019 shares	0.01%	-132.76K(-21.80%)Reduced	SEC filing ↗ Aug 14, 2024	▾
20	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$6.19M 470,000 shares	0.01%	+75.40K(+19.10%)Added	SEC filing ↗ Aug 9, 2024	▾

Showing 20 / 150 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

150

Cancelled or null records excluded

Disclosed shares

50,178,061

Not deduplicated across managers

Disclosed value

$660.84M

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. · Q2 2024

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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.