The Filings Report

SEI Investments Co insider trading

SEICfinancial statementsForm 4 filings on EDGAR175 transactions since Nov 3, 2024

From August 6, 2026 to November 3, 2026, 0 insiders at SEI Investments Co bought $0 of stock in the open market, and 5 sold $13M. Officers and directors accounted for $0 of purchases and $9M of sales. The last reported transaction was an open-market sale by West Alfred P JR on September 30, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 1, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

SEIC daily priceSplit-adjusted prices in US dollars

Bought $0Sold $13MAug 6, 2026 – Nov 3, 2026

Nov 3, 2026O $105.65 · H $106.39 · L $104.80 · C $105.46Bought $0 (0)Sold $0 (0)
$98$101$105$109$1132026-08-06: open $105.50, high $107.00, low $104.06, close $104.692026-08-07: open $104.50, high $104.98, low $103.64, close $104.702026-08-10: open $104.70, high $106.00, low $104.27, close $104.722026-08-11: open $104.77, high $105.95, low $104.16, close $104.632026-08-12: open $104.17, high $105.65, low $103.96, close $105.542026-08-13: open $106.00, high $106.86, low $104.76, close $106.392026-08-14: open $106.52, high $106.91, low $105.96, close $106.382026-08-17: open $105.96, high $106.93, low $105.29, close $105.472026-08-18: open $106.25, high $107.46, low $105.53, close $106.922026-08-19: open $106.76, high $108.04, low $106.76, close $107.362026-08-20: open $107.75, high $109.11, low $107.43, close $107.602026-08-21: open $108.26, high $109.75, low $108.19, close $109.532026-08-24: open $109.75, high $111.90, low $109.62, close $110.752026-08-25: open $110.43, high $111.50, low $109.90, close $110.982026-08-26: open $110.98, high $111.43, low $110.34, close $110.782026-08-27: open $110.27, high $111.43, low $109.89, close $111.302026-08-28: open $111.68, high $112.15, low $111.18, close $111.632026-08-31: open $111.46, high $111.63, low $110.46, close $110.982026-09-01: open $110.57, high $111.15, low $109.42, close $109.542026-09-02: open $109.70, high $110.50, low $108.10, close $109.122026-09-03: open $110.00, high $111.48, low $109.75, close $111.462026-09-04: open $110.57, high $111.16, low $109.83, close $110.392026-09-08: open $110.33, high $110.75, low $108.50, close $108.602026-09-09: open $108.38, high $108.51, low $106.82, close $107.172026-09-10: open $107.19, high $107.87, low $106.32, close $106.772026-09-11: open $107.91, high $108.94, low $105.69, close $106.932026-09-14: open $107.86, high $108.05, low $105.08, close $105.512026-09-15: open $106.48, high $106.48, low $105.01, close $105.822026-09-16: open $105.72, high $106.34, low $103.22, close $104.572026-09-17: open $105.49, high $105.63, low $103.96, close $104.852026-09-18: open $104.85, high $106.26, low $104.21, close $105.202026-09-21: open $106.25, high $106.25, low $105.00, close $105.382026-09-22: open $105.58, high $105.94, low $101.47, close $103.762026-09-23: open $103.26, high $105.27, low $103.26, close $104.832026-09-24: open $104.99, high $105.50, low $103.54, close $104.782026-09-25: open $105.00, high $106.12, low $105.00, close $105.652026-09-28: open $105.75, high $105.75, low $104.09, close $104.822026-09-29: open $104.48, high $105.35, low $103.17, close $103.352026-09-30: open $103.51, high $104.38, low $102.65, close $102.662026-10-01: open $102.37, high $103.96, low $98.45, close $103.872026-10-02: open $104.57, high $105.07, low $102.40, close $102.432026-10-05: open $102.16, high $104.04, low $101.24, close $103.262026-10-06: open $103.08, high $103.94, low $102.54, close $102.862026-10-07: open $102.84, high $102.84, low $100.87, close $102.072026-10-08: open $102.07, high $103.79, low $101.40, close $103.252026-10-09: open $103.60, high $105.03, low $102.62, close $104.702026-10-12: open $104.70, high $105.51, low $104.50, close $105.002026-10-13: open $105.90, high $105.90, low $104.00, close $105.512026-10-14: open $105.31, high $105.95, low $104.47, close $105.272026-10-15: open $105.69, high $105.72, low $102.90, close $105.272026-10-16: open $106.00, high $106.81, low $103.96, close $104.402026-10-19: open $104.42, high $105.44, low $104.39, close $104.792026-10-20: open $104.79, high $107.22, low $104.78, close $107.152026-10-21: open $107.59, high $108.53, low $105.96, close $108.432026-10-22: open $108.60, high $110.00, low $104.45, close $104.502026-10-23: open $104.34, high $105.27, low $102.01, close $102.302026-10-26: open $102.78, high $103.94, low $102.78, close $103.342026-10-27: open $103.50, high $103.86, low $102.49, close $102.882026-10-28: open $102.89, high $103.58, low $102.09, close $103.202026-10-29: open $104.46, high $105.00, low $103.63, close $104.732026-10-30: open $105.22, high $105.22, low $102.59, close $103.422026-11-02: open $104.50, high $106.57, low $104.40, close $105.892026-11-03: open $105.65, high $106.39, low $104.80, close $105.46Insider purchases / sales · USD$5M$0−$5M2026-08-28: 0 purchases ($0), 1 sales ($4M)2026-09-01: 0 purchases ($0), 1 sales ($549K)2026-09-03: 0 purchases ($0), 1 sales ($4M)2026-09-22: 0 purchases ($0), 1 sales ($247K)2026-09-29: 0 purchases ($0), 1 sales ($3M)2026-09-30: 0 purchases ($0), 1 sales ($566K)Aug 6Aug 28Sep 21Oct 13Nov 3

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Nov 3, 2026. Insider data through Nov 3, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

175 transactions from November 3, 2024 to November 3, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Sep 30, 2026West Alfred P JR—open-market sale5,483$103.16$566K7MOct 1, 2026
Sep 29, 2026West Alfred P JR—open-market sale28,394$103.40$3M7MOct 1, 2026
Sep 22, 2026Lane MichaelExecutive Vice Presidentopen-market sale2,400$102.78$247K39,581Sep 24, 2026
Sep 3, 2026Hicke RyanChief Executive Officeroption exercise17,500$48.47$848K210,315Sep 8, 2026
Sep 3, 2026Hicke RyanChief Executive Officeroption exercise20,000$64.43$1M230,315Sep 8, 2026
Sep 3, 2026Hicke RyanChief Executive Officeropen-market sale37,500$110.71$4M192,815Sep 8, 2026
Sep 1, 2026Romeo CarmenDirectoroption exercise5,000$49.63$248K2MSep 3, 2026
Sep 1, 2026Romeo CarmenDirectoropen-market sale5,000$109.70$549K2MSep 3, 2026
Aug 28, 2026Peterson MichaelExecutive Vice Presidentoption exercise37,500$56.54$2M57,648Sep 1, 2026
Aug 28, 2026Peterson MichaelExecutive Vice Presidentopen-market sale37,500$111.51$4M20,148Sep 1, 2026
Aug 5, 2026McCabe PhilipSee Remarksoption exercise5,043$49.63$250K59,927Aug 6, 2026
Aug 5, 2026McCabe PhilipSee Remarksopen-market sale5,043$105.50$532K54,884Aug 6, 2026
Aug 4, 2026McCabe PhilipSee Remarksoption exercise9,957$49.63$494K64,841Aug 6, 2026
Aug 4, 2026McCabe PhilipSee Remarksoption exercise15,000$49.63$744K79,841Aug 6, 2026
Aug 4, 2026McCabe PhilipSee Remarksopen-market sale24,957$105.04$3M54,884Aug 6, 2026
Aug 3, 2026Mccarthy KathrynDirectoroption exercise5,000$71.12$356K82,883Aug 4, 2026
Aug 3, 2026Mccarthy KathrynDirectoroption exercise5,000$71.12$356K87,883Aug 4, 2026
Aug 3, 2026Mccarthy KathrynDirectoropen-market sale10,000$103.53$1M77,883Aug 4, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*option exercise2,500$64.43$161K3,421Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*option exercise2,500$64.43$161K5,921Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*option exercise5,000$56.54$283K10,921Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*option exercise5,000$56.54$283K15,921Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*open-market sale2,300$101.11$233K13,621Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*open-market sale5,300$102.01$541K8,321Jul 30, 2026
Jul 28, 2026Warner Mark AndrewSee Remarks*open-market sale7,400$102.97$762K921Jul 30, 2026
Jul 28, 2026Peterson MichaelExecutive Vice Presidentoption exercise25,000$55.73$1M45,148Jul 30, 2026
Jul 28, 2026Peterson MichaelExecutive Vice Presidentopen-market sale25,000$102.05$3M20,148Jul 30, 2026
Jul 28, 2026Guarino CarlDirectoroption exercise5,000$49.63$248K23,308Jul 30, 2026
Jul 28, 2026Guarino CarlDirectoroption exercise5,000$49.63$248K28,308Jul 30, 2026
Jul 28, 2026Guarino CarlDirectoropen-market sale10,000$103.19$1M18,308Jul 30, 2026
Jul 24, 2026Sharma SanjaySee Remarks*option exercise10,000$71.12$711K49,829Jul 28, 2026
Jul 24, 2026Sharma SanjaySee Remarks*option exercise10,000$71.12$711K59,829Jul 28, 2026
Jul 24, 2026Sharma SanjaySee Remarks*open-market sale20,000$99.33$2M39,829Jul 28, 2026
Jul 24, 2026Shah Sneha S.See Remarks*tax withholding3,746$96.73$362K14,092Jul 28, 2026
Jun 29, 2026West Alfred P JR—open-market sale5,652$87.18$493K7MJun 29, 2026
Jun 29, 2026West Alfred P JR—open-market sale1,680$88.09$148K7MJun 29, 2026
Jun 26, 2026West Alfred P JR—open-market sale46,162$87.21$4M7MJun 29, 2026
Jun 26, 2026West Alfred P JR—open-market sale3,838$87.67$336K7MJun 29, 2026
Jun 9, 2026Doran WilliamDirectoropen-market sale5,000$90.50$453K618,802Jun 11, 2026
May 4, 2026Mccarthy KathrynDirectoroption exercise5,000$49.63$248K82,883May 5, 2026
May 4, 2026Mccarthy KathrynDirectoroption exercise5,000$49.63$248K87,883May 5, 2026
May 4, 2026Mccarthy KathrynDirectoropen-market sale10,000$91.07$911K77,883May 5, 2026
Apr 28, 2026Warner Mark AndrewIn Remarksoption exercise4,000$48.47$194K4,921Apr 30, 2026
Apr 28, 2026Warner Mark AndrewIn Remarksopen-market sale4,000$91.16$365K921Apr 30, 2026
Apr 23, 2026McCabe PhilipSee Remarksopen-market sale15,000$91.82$1M54,884Apr 24, 2026
Apr 23, 2026Sharma SanjaySee Remarks*option exercise12,500$49.63$620K52,329Apr 23, 2026
Apr 23, 2026Sharma SanjaySee Remarks*option exercise12,500$49.63$620K64,829Apr 23, 2026
Apr 23, 2026Sharma SanjaySee Remarks*open-market sale23,441$90.08$2M41,388Apr 23, 2026
Apr 23, 2026Sharma SanjaySee Remarks*open-market sale1,559$90.73$141K39,829Apr 23, 2026
Apr 23, 2026Peterson MichaelEXECUTIVE VICE PRESIDENToption exercise10,000$48.47$485K30,148Apr 23, 2026

Who the insiders are

Everyone who reported a transaction since November 3, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
West Alfred P JRExecutive Chairman, Director, 10% ownerSep 30, 2026open-market sale7M—$16M (12)0 of 12
Hicke RyanChief Executive Officer, DirectorSep 3, 2026option exercise210,315—$11M (4)0 of 4
Peterson MichaelExecutive Vice PresidentAug 28, 2026option exercise57,648—$10M (4)0 of 4
McCabe PhilipSee RemarksAug 5, 2026option exercise59,927—$6M (4)0 of 4
Sharma SanjaySee Remarks*Jul 24, 2026option exercise49,829—$4M (3)0 of 3
Warner Mark AndrewSee Remarks*Jul 28, 2026option exercise3,421—$2M (5)0 of 5
Mccarthy KathrynDirectorAug 3, 2026option exercise82,883—$2M (2)0 of 2
Doran WilliamDirectorJun 9, 2026open-market sale618,802—$1M (2)0 of 2
Guarino CarlDirectorJul 28, 2026option exercise23,308—$1M (1)0 of 1
Romeo CarmenDirectorSep 1, 2026option exercise2M—$969K (2)0 of 2
Lane MichaelExecutive Vice PresidentSep 22, 2026open-market sale39,581—$247K (1)0 of 1
Denham SeanExecutive VP, CFO, COOMar 18, 2026tax withholding57,758———
Risi Karin A.DirectorDec 12, 2025award4,342———
Naratil Thomas C.DirectorDec 12, 2025award4,342———
Brassington JonathanDirectorDec 12, 2025award6,207———
Shah Sneha S.See Remarks*Jul 24, 2026tax withholding14,092———
Miller Stephanie D.DirectorDec 12, 2024award3,941———

Questions

Are SEI Investments Co insiders buying or selling?

Over the twelve months to November 3, 2026, 11 insiders at SEI Investments Co sold $54M of stock in the open market ($40M by officers and directors), and no insider bought. Net, insiders sold $54M. Only open-market purchases and sales are counted.

Who sold the most SEI Investments Co stock in the last year?

West Alfred P JR (—) sold $16M in 12 open-market sales over the twelve months to November 3, 2026.

Do SEI Investments Co executives sell under 10b5-1 plans?

0 of the 40 open-market sales in the last twelve months (0%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on SEI Investments Co

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.