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Livermore
Livermore
ZHEN

MediaAlpha, Inc.

MAX
Exchange
NYSE
Industry
Services-Business Services, NEC
SEC CIK
0001818383

In the last 90 days, MediaAlpha, Inc. insiders filed 0 open-market purchases and 26 sales; 153 institutions reported holding it in 13F filings for Q2 2026, worth $610.7M in total; no superinvestor holds it.

Holders of 5% or more of MAX

Holders whose latest Schedule 13D or 13G filing reports 5% or more of MediaAlpha, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of MAX
HolderLatest formStakeChangeFirst filedLatest filingFiling
White Mountains Insurance Group Ltd13D/A31.70%17.9M shares–Aug 8, 20251 filingAug 8, 2025SEC
Nonko Eugene13D/A10.80%6.00M shares–Feb 28, 20251 filingFeb 28, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

6 Schedule 13D and 13G filings on MediaAlpha, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on MAX
Filed (ET)FilerFormStakeChangeEvent dateFiling
Nov 12, 20254:05 PM ETInsignia Capital Partners GP, L.L.C.and 5 others13G/A0.00%0 shares–Below 5%Sep 30, 2025SEC
Oct 31, 202511:02 AM ETVanguard Group Inc13G/A4.61%2.60M shares−0.64 ppfrom 5.25%Below 5%Sep 30, 2025SEC
Aug 8, 20254:22 PM ETWhite Mountains Insurance Group Ltdand 1 other13D/A31.70%17.9M shares–Aug 8, 2025SEC
Apr 30, 202511:11 AM ETVanguard Group Inc13G/A5.25%2.91M shares–Mar 31, 2025SEC
Apr 29, 20259:08 AM ETBlackRock, Inc.13G/A4.20%2.33M shares–Below 5%Mar 31, 2025SEC
Feb 28, 20258:01 PM ETNonko Eugeneand 1 other13D/A10.80%6.00M shares–Feb 26, 2025SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell MediaAlpha, Inc. shares.

No Form 144 notices for MediaAlpha, Inc. are on file.