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 152 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	$323.38M 17,856,614 shares	59.53%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2024	▾
02	BlackRock, Inc. CIK 2012383 · View history	$68.24M 3,768,316 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$62.55M 3,453,690 shares	0.00%	+372.43K(+12.10%)Added	SEC filing ↗ Nov 13, 2024	▾
04	Broad Bay Capital Management, LP CIK 1759115 · View history	$44.69M 2,467,466 shares	6.14%	+84.26K(+3.50%)Added	SEC filing ↗ Nov 14, 2024	▾
05	Driehaus Capital Management LLC CIK 938206 · View history	$40.70M 2,247,395 shares	0.35%	+810.78K(+56.40%)Added	SEC filing ↗ Nov 14, 2024	▾
06	Clearline Capital LP CIK 1600136 · View history	$22.48M 1,241,419 shares	1.99%	+664.69K(+115.30%)Added	SEC filing ↗ Nov 14, 2024	▾
07	Nuveen Asset Management, LLC CIK 1521019 · View history	$20.63M 1,139,264 shares	0.01%	+1.04M(+1,039.20%)Added	SEC filing ↗ Nov 14, 2024	▾
08	TimesSquare Capital Management, LLC CIK 1313816 · View history	$16.60M 916,405 shares	0.25%	-156.16K(-14.60%)Reduced	SEC filing ↗ Nov 4, 2024	▾
09	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$15.75M 869,786 shares	0.01%	+404.03K(+86.70%)Added	SEC filing ↗ Nov 14, 2024	▾
10	Divisadero Street Capital Management, LP CIK 1901865 · View history	$13.56M 748,694 shares	1.74%	+144.59K(+23.90%)Added	SEC filing ↗ Nov 14, 2024	▾
11	MORGAN STANLEY CIK 895421 · Amended · View history	$13.09M 722,713 shares	0.00%	-27.11K(-3.60%)Reduced	SEC filing ↗ May 14, 2025	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$12.51M 690,574 shares	0.00%	+154.64K(+28.90%)Added	SEC filing ↗ Nov 12, 2024	▾
13	Qube Research & Technologies Ltd CIK 1729829 · View history	$12.31M 679,749 shares	0.02%	+110.56K(+19.40%)Added	SEC filing ↗ Nov 14, 2024	▾
14	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$10.06M 555,537 shares	0.00%	+328.54K(+144.70%)Added	SEC filing ↗ Nov 14, 2024	▾
15	Invesco Ltd. CIK 914208 · View history	$9.99M 551,485 shares	0.00%	+551.49KNew	SEC filing ↗ Nov 12, 2024	▾
16	STATE STREET CORP CIK 93751 · View history	$9.92M 547,906 shares	0.00%	+35.96K(+7.00%)Added	SEC filing ↗ Nov 14, 2024	▾
17	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$8.70M 480,571 shares	0.01%	+35.90K(+8.10%)Added	SEC filing ↗ Nov 14, 2024	▾
18	J. Goldman & Co LP CIK 1412741 · View history	$8.45M 466,427 shares	0.37%	+367.20K(+370.00%)Added	SEC filing ↗ Nov 14, 2024	▾
19	SILVERCREST ASSET MANAGEMENT GROUP LLC CIK 1232395 · View history	$8.10M 447,148 shares	0.06%	+76.11K(+20.50%)Added	SEC filing ↗ Nov 14, 2024	▾
20	LAZARD ASSET MANAGEMENT LLC CIK 1207017 · View history	$7.96M 439,675 shares	0.01%	+420.57K(+2,201.40%)Added	SEC filing ↗ Nov 14, 2024	▾

Showing 20 / 152 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

152

Cancelled or null records excluded

Disclosed shares

48,889,035

Not deduplicated across managers

Disclosed value

$885.48M

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. · Q3 2024

Explore all 152 reporting institutions.

This page includes 20 of 152 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.