MediaAlpha, Inc. (MAX)
NYSE: MAX · Services-Business Services, NEC · Los Angeles, CA · filing with the SEC since 2020
Grade4.9
◀ Past 4.3● Present 4.6▶ Future 5.5
Who owns MediaAlpha, Inc.
As filed with the SECHolders of 5% or more
3
White Mountains Insurance Group Ltd. holds 33% of Class A Common Stock, par value $0.01 per share, as its SCHEDULE 13D/A filed May 1, 2026 says.
Directors and officers
13
report now, of 26 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
White Mountains Insurance Group Ltd.
SCHEDULE 13D/A · filed May 1, 2026 · Class A Common Stock, par value $0.01 per share · 31.7% in Aug 8, 2025
Eugene Nonko
SCHEDULE 13D/A · filed Aug 26, 2026 · Class A Common Stock, par value $0.01 per share · 10.8% in Feb 28, 2025
Divisadero Street Capital Management, LP
SCHEDULE 13G · filed Jul 28, 2026 · Class A Common Stock, $0.01 par value per share
The Vanguard Group
SCHEDULE 13G/A · filed Oct 31, 2025 · Common Stock · reported falling below 5%, from 5.25% in Apr 30, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 29, 2025 · Class A Stock · reported falling below 5%
Insignia Capital Partners GP, L.L.C.
SCHEDULE 13G/A · filed Nov 12, 2025 · Class A Common Stock, par value $0.01 per share · reported falling below 5%
What MAX reports owning in othersstakes of 5% or more, and other ties
5 subsidiaries in 2 countries, from the list filed with the 10-K filed Feb 23, 2026.
Insider tradesForm 4
341sales
0purchases
331sales on a scheduled plan
6people selling
$124Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window6 of 36 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| White Mountains Insurance Group Ltd | director | 1 | $76.5M | 0 | 0 | $0 |
| Nonko Eugene | CHIEF TECHNOLOGY OFFICER AND CO-FOUNDER | 214 | $24.5M | 210 | 0 | $0 |
| Yi Steven | See Remarks | 93 | $20.2M | 91 | 0 | $0 |
| Yeh Kuanling Amy | Chief Technology Officer | 19 | $1.8M | 17 | 0 | $0 |
| Cramer Keith | Chief Revenue Officer | 11 | $1.4M | 10 | 0 | $0 |
| Coyne Jeffrey B | GENERAL COUNSEL AND SECRETARY | 3 | $100,000 | 3 | 0 | $0 |