Company · Ownership research

MediaAlpha, Inc. MAX

CIK 0001818383

Form 4 transactions dated Nov 1, 2023 to Nov 10, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 264 rows; the complete set is available through the API.

Insider filings on file run through Nov 5, 2026.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $297.58K
Sold: $329.90M

Nov 1, 2023 – Nov 5, 2026
Available records · partial months are marked ·

202610 of 30 preview events · 264 available in 2026

Date	Insider	Activity	Trade value (USD)	% of prior holding
Nov 4, 2026	WHITE MOUNTAINS INSURANCE GROUP LTD · WM Hinson (Bermuda) Ltd. 10% owner	Sale	$76.46M 5,500,391 shares sold	Unavailable Indirect holding	▾
Nov 4, 2026	Yi Steven See Remarks · Director	Sale10b5-1 footnote	$2.34M 151,129 shares sold	7.39% sold Direct holding	▾
Nov 4, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$86.44K 5,667 shares sold	0.86% sold Direct holding	▾
Nov 4, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$1.43M 93,279 shares sold	16.91% sold LLC holding	▾
Nov 3, 2026	Yi Steven See Remarks · Director	Sale10b5-1 footnote	$1.96M 130,065 shares sold	5.98% sold Direct holding	▾
Nov 3, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$224.28K 15,022 shares sold	2.23% sold Direct holding	▾
Nov 3, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$2.41M 160,185 shares sold	22.50% sold LLC holding	▾
Nov 2, 2026	Yi Steven See Remarks · Director	Sale10b5-1 footnote	$2.05M 138,806 shares sold	6.00% sold Direct holding	▾
Nov 2, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$1.62M 109,401 shares sold	13.94% sold Direct holding	▾
Nov 2, 2026	Nonko Eugene Director	Sale10b5-1 footnote	$1.15M 78,009 shares sold	9.88% sold LLC holding	▾

Showing 30 / 264 record groups in 2026. The complete set is available through the API.

MediaAlpha, Inc. · MAX

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 264 purchase / sale groups and 30 of 50 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"MAX","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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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.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.