Company · Ownership research

SEI INVESTMENTS CO SEIC

CIK 0000350894

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 32 rows; the complete set is available through the API.

Insider filings on file run through Nov 5, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $178.95M

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

202410 of 30 preview events · 32 available in 2024

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 16, 2024	WEST ALFRED P JR Executive Chairman · Director	Sale	$4.44M 52,042 shares sold	0.71% sold Direct holding	▾
Dec 13, 2024	WEST ALFRED P JR Executive Chairman · Director	Sale	$8.07M 94,158 shares sold	1.28% sold Direct holding	▾
Dec 6, 2024	WEST ALFRED P JR Executive Chairman · Director · 10% owner	Sale	$504.03K 5,984 shares sold	0.08% sold Direct holding	▾
Dec 4, 2024	WEST ALFRED P JR Executive Chairman · Director · 10% owner	Sale	$1.57M 19,010 shares sold	0.26% sold Direct holding	▾
Nov 26, 2024	DORAN WILLIAM Director	Sale	$409.00K 5,000 shares sold	0.75% sold Direct holding	▾
Nov 11, 2024	WEST ALFRED P JR Executive Chairman · Director	Sale	$573.67K 7,099 shares sold	0.10% sold Direct holding	▾
Nov 8, 2024	WEST ALFRED P JR Executive Chairman · Director	Sale	$8.03M 100,000 shares sold	1.34% sold Direct holding	▾
Nov 7, 2024	WEST ALFRED P JR Executive Chairman · Director	Sale	$2.41M 30,000 shares sold	0.40% sold Direct holding	▾
Nov 6, 2024	ROMEO CARMEN Director	Sale	$398.20K 5,000 shares sold	0.32% sold Direct holding	▾
Nov 6, 2024	Peterson Michael EXECUTIVE VICE PRESIDENT	Sale	$791.40K 10,000 shares sold	60.61% sold Direct holding	▾

Showing 30 / 32 record groups in 2024. The complete set is available through the API.

SEI INVESTMENTS CO · SEIC

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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 32 purchase / sale groups and 30 of 60 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"SEIC","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.