Company · Ownership research

SEI INVESTMENTS CO SEIC

CIK 0000350894

Form 4 transactions dated Sep 1, 2023 to Sep 23, 2026, as reported to the SEC.

Insider trading Initial holdingsInstitutional holders

This page lists 30 of 51 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-08.

Insider purchases & sales

Purchased: $0.00
Sold: $186.04M

Sep 1, 2023 – Sep 8, 2026
Available records · partial months are marked ·

202610 of 22 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-09-03	Hicke Ryan Chief Executive Officer	Sale	$4.15M 37,500 shares sold	16.28% sold Direct holding	▾
2026-09-01	ROMEO CARMEN Director	Sale	$548.50K 5,000 shares sold	0.32% sold Direct holding	▾
2026-08-28	Peterson Michael Executive Vice President	Sale	$4.18M 37,500 shares sold	65.05% sold Direct holding	▾
2026-08-05	McCabe Philip See Remarks	Sale	$532.04K 5,043 shares sold	8.42% sold Direct holding	▾
2026-08-04	McCabe Philip See Remarks	Sale	$2.62M 24,957 shares sold	31.26% sold Direct holding	▾
2026-08-03	MCCARTHY KATHRYN Director	Sale	$1.04M 10,000 shares sold	11.38% sold Direct holding	▾
2026-07-28	Warner Mark Andrew See Remarks*	Sale	$1.54M 15,000 shares sold	94.22% sold Direct holding	▾
2026-07-28	Peterson Michael Executive Vice President	Sale	$2.55M 25,000 shares sold	55.37% sold Direct holding	▾
2026-07-28	GUARINO CARL Director	Sale	$1.03M 10,000 shares sold	35.33% sold Direct holding	▾
2026-07-24	Sharma Sanjay See Remarks*	Sale	$1.99M 20,000 shares sold	33.43% sold Direct holding	▾

Showing 22 / 22 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 22 of 22 purchase / sale groups and 30 of 51 other groups; the totals and the monthly series cover the whole window.

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{"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. 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.