Company · Ownership research

SEI INVESTMENTS CO SEIC

CIK 0000350894

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 56 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 ·

202610 of 25 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Sep 30, 2026	WEST ALFRED P JR Chairman Emeritus	Sale	$565.64K 5,483 shares sold	0.08% sold Direct holding	▾
Sep 29, 2026	WEST ALFRED P JR Chairman Emeritus	Sale	$2.94M 28,394 shares sold	0.42% sold Direct holding	▾
Sep 22, 2026	LANE MICHAEL Executive Vice President	Sale	$246.67K 2,400 shares sold	5.72% sold Direct holding	▾
Sep 3, 2026	Hicke Ryan Chief Executive Officer	Sale	$4.15M 37,500 shares sold	16.28% sold Direct holding	▾
Sep 1, 2026	ROMEO CARMEN Director	Sale	$548.50K 5,000 shares sold	0.32% sold Direct holding	▾
Aug 28, 2026	Peterson Michael Executive Vice President	Sale	$4.18M 37,500 shares sold	65.05% sold Direct holding	▾
Aug 5, 2026	McCabe Philip See Remarks	Sale	$532.04K 5,043 shares sold	8.42% sold Direct holding	▾
Aug 4, 2026	McCabe Philip See Remarks	Sale	$2.62M 24,957 shares sold	31.26% sold Direct holding	▾
Aug 3, 2026	MCCARTHY KATHRYN Director	Sale	$1.04M 10,000 shares sold	11.38% sold Direct holding	▾
Jul 28, 2026	Warner Mark Andrew See Remarks*	Sale	$1.54M 15,000 shares sold	94.22% sold Direct holding	▾

Showing 25 / 25 record groups in 2026. 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 25 of 25 purchase / sale groups and 30 of 56 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.