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SEI Investments Co

SEIC
Exchange
Nasdaq
Industry
Security Brokers, Dealers & Flotation Companies
SEC CIK
0000350894

In the last 90 days, SEI Investments Co insiders filed 0 open-market purchases and 11 sales; 575 institutions reported holding it in 13F filings for Q2 2026, worth $7.94B in total; Markel Group is the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by SEI Investments Co insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
11 filings
10 insiders, $25.4M in total
Insiders trading
10
Net value
−$25.4M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for SEI Investments Co, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for SEI Investments Co
NameTitleLast reported holdingLast filingFilings, past year
Lane MichaelExecutive Vice President39,581Sep 24, 20262
Hicke RyanChief Executive Officer192,815Sep 8, 20264
Romeo CarmenDirector1,560,293Sep 3, 20264
Peterson MichaelExecutive Vice President20,148Sep 1, 20266
McCabe PhilipSee Remarks54,884Aug 6, 20266
McCarthy KathrynDirector77,883Aug 4, 20265
Warner Mark AndrewSee Remarks*921Jul 30, 20264
Guarino CarlDirector18,308Jul 30, 20262
Sharma SanjaySee Remarks*39,829Jul 28, 20263
Shah Sneha S.See Remarks*14,092Jul 28, 20261
West Alfred P JrOther: Chairman Emeritus6,818,451Jun 29, 20265
Doran WilliamDirector618,802Jun 11, 20264
Denham SeanExecutive VP, CFO, COO57,758Mar 19, 20262
Brassington JonathanDirector6,207Dec 16, 20251
Naratil Thomas C.Director4,342Dec 16, 20251
Risi Karin A.Director4,342Dec 16, 20251
Miller Stephanie D.Director3,941Dec 16, 20240
Klauder PaulEXECUTIVE VICE PRESIDENT20,752Mar 28, 20240
Withrow WayneEXECUTIVE VICE PRESIDENT55,399Feb 9, 20240
McGonigle DennisEVP, CFO594,163Sep 1, 20230
Blumenstein SarahDirector6,447Feb 22, 20230
Barr KevinExecutive Vice President204,741Dec 12, 20220
Heilig KathyTreasurer1,891Nov 21, 20220
Meyer StephenEXECUTIVE VICE PRESIDENT186,224Dec 14, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 24, 2026 (view filing)4:15 PM ETSep 222 daysLane MichaelExecutive Vice PresidentSSale−2.40K$102.78−$246.7K−5.7%39.6K after
Sep 8, 2026 (view filing)4:05 PM ETSep 35 daysHicke RyanChief Executive OfficerSSale−37.5K$110.71−$4.15M−16.3%192.8K after
Sep 3, 2026 (view filing)4:09 PM ETSep 12 daysRomeo CarmenDirectorSSale−5.00K$109.70−$548.5K−0.3%1.56M after
Sep 1, 2026 (view filing)4:05 PM ETAug 284 daysPeterson MichaelExecutive Vice PresidentSSale−37.5K$111.51−$4.18M−65.0%20.1K after
Aug 6, 2026 (view filing)4:23 PM ETAug 4-52 daysMcCabe PhilipSee RemarksSSale−30.0K$105.12−$3.15M−35.3%54.9K after2 lots
Aug 4, 2026 (view filing)4:24 PM ETAug 31 dayMcCarthy KathrynDirectorSSale−10.0K$103.54−$1.04M−11.4%77.9K after
Jul 30, 2026 (view filing)4:06 PM ETJul 282 daysWarner Mark AndrewSee Remarks*SSale−15.0K$102.35−$1.54M−94.2%921 after3 lots
Jul 30, 2026 (view filing)4:06 PM ETJul 282 daysPeterson MichaelExecutive Vice PresidentSSale−25.0K$102.05−$2.55M−55.4%20.1K after
Jul 30, 2026 (view filing)4:05 PM ETJul 282 daysGuarino CarlDirectorSSale−10.0K$103.20−$1.03M−35.3%18.3K after
Jul 28, 2026 (view filing)4:08 PM ETJul 244 daysSharma SanjaySee Remarks*SSale−20.0K$99.33−$1.99M−33.4%39.8K after
Jun 29, 2026 (view filing)Jun 26-293 daysWest Alfred P JrOther: Chairman EmeritusSSale−57.3K$87.26−$5.00M−0.8%6.82M after4 lots
Jun 11, 2026 (view filing)Jun 92 daysDoran WilliamDirectorSSale−5.00K$90.50−$452.5K−0.8%618.8K after
May 5, 2026 (view filing)May 41 dayMcCarthy KathrynDirectorSSale−10.0K$91.07−$910.7K−11.4%77.9K after
Apr 30, 2026 (view filing)Apr 282 daysWarner Mark AndrewIn RemarksSSale−4.00K$91.16−$364.6K−81.3%921 after
Apr 24, 2026 (view filing)Apr 231 dayMcCabe PhilipSee RemarksSSale−15.0K$91.82−$1.38M−21.5%54.9K after
Apr 23, 2026 (view filing)Apr 23Same daySharma SanjaySee Remarks*SSale−25.0K$90.12−$2.25M−38.6%39.8K after2 lots
Apr 23, 2026 (view filing)Apr 23Same dayPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−10.0K$90.00−$900.0K−33.2%20.1K after
Mar 12, 2026 (view filing)Mar 10-112 daysWest Alfred P JrOther: Chairman EmeritusSSale−62.4K$80.12−$5.00M−0.9%6.88M after5 lots
Feb 26, 2026 (view filing)Feb 251 dayWarner Mark AndrewOther: See RemarksSSale−4.00K$81.74−$327.0K−81.3%921 after
Feb 2, 2026 (view filing)Jan 294 daysHicke RyanCHIEF EXECUTIVE OFFICERSSale−80.0K$87.36−$6.99M−28.9%197.2K after3 lots
Dec 23, 2025 (view filing)Dec 221 dayDoran WilliamDirectorSSale−7.00K$83.85−$587.0K−1.1%623.8K after
Dec 8, 2025 (view filing)Dec 44 daysMcCabe PhilipSee RemarksSSale−12.0K$81.11−$973.3K−16.1%62.5K after
Dec 5, 2025 (view filing)Dec 32 daysWest Alfred P JrExecutive ChairmanSSale−24.8K$80.87−$2.00M−0.4%6.94M after
Nov 13, 2025 (view filing)Nov 121 dayPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−25.0K$84.21−$2.11M−64.9%13.5K after
Nov 12, 2025 (view filing)Nov 111 dayRomeo CarmenDirectorSSale−5.00K$84.01−$420.1K−0.3%1.57M after
Sep 29, 2025 (view filing)Sep 29Same dayMcCarthy KathrynDirectorSSale−10.0K$85.66−$856.6K−11.7%75.6K after
Sep 24, 2025 (view filing)Sep 231 dayGuarino CarlDirectorSSale−10.0K$86.41−$864.1K−38.4%16.0K after
Aug 20, 2025 (view filing)Aug 191 dayHicke RyanCHIEF EXECUTIVE OFFICERSSale−35.0K$88.30−$3.09M−17.0%171.3K after
Aug 8, 2025 (view filing)Aug 71 dayPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−7.09K$88.55−$627.7K−34.4%13.5K after
Aug 6, 2025 (view filing)Aug 51 dayPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−684$88.69−$60.7K−4.8%13.5K after
Aug 4, 2025 (view filing)Jul 314 daysPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−4.73K$88.51−$418.4K−25.9%13.5K after
Jul 30, 2025 (view filing)Jul 291 dayWarner Mark AndrewOther: See RemarksSSale−5.00K$88.75−$443.8K−79.4%1.30K after
May 30, 2025 (view filing)May 28-292 daysWest Alfred P JrExecutive ChairmanSSale−141.1K$85.08−$12.0M−2.0%6.94M after3 lots
May 16, 2025 (view filing)May 142 daysHicke RyanCHIEF EXECUTIVE OFFICERSSale−21.0K$83.36−$1.75M−10.9%171.3K after
May 16, 2025 (view filing)May 151 dayPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−50.0K$84.27−$4.21M−78.7%13.5K after
May 16, 2025 (view filing)May 142 daysSharma SanjaySee Remarks*SSale−20.0K$83.40−$1.67M−45.6%23.9K after
Mar 7, 2025 (view filing)Mar 52 daysWest Alfred P JrExecutive ChairmanSSale−1.37K$76.28−$104.7K0.0%7.08M after
Mar 5, 2025 (view filing)Mar 3-42 daysWest Alfred P JrExecutive ChairmanSSale−152.8K$77.88−$11.9M−2.1%7.08M after6 lots
Mar 5, 2025 (view filing)Mar 32 daysWarner Mark AndrewOther: See RemarksSSale−5.00K$80.39−$401.9K−79.4%1.30K after
Dec 17, 2024 (view filing)Dec 13-164 daysWest Alfred P JrExecutive ChairmanSSale−146.2K$85.55−$12.5M−2.0%7.23M after6 lots
Dec 6, 2024 (view filing)Dec 4-62 daysWest Alfred P JrExecutive ChairmanSSale−25.0K$82.91−$2.07M−0.3%7.37M after2 lots
Nov 27, 2024 (view filing)Nov 261 dayDoran WilliamDirectorSSale−5.00K$81.80−$409.0K−0.8%661.4K after
Nov 12, 2024 (view filing)Nov 7-115 daysWest Alfred P JrExecutive ChairmanSSale−137.1K$80.28−$11.0M−1.8%7.36M after3 lots
Nov 8, 2024 (view filing)Nov 62 daysRomeo CarmenDirectorSSale−5.00K$79.64−$398.2K−0.3%1.58M after
Nov 8, 2024 (view filing)Nov 62 daysPeterson MichaelEXECUTIVE VICE PRESIDENTSSale−10.0K$79.14−$791.4K−60.6%6.50K after
Oct 29, 2024 (view filing)Oct 254 daysHicke RyanChief Executive OfficerSSale−10.0K$74.90−$749.0K−6.3%147.6K after
Oct 29, 2024 (view filing)Oct 254 daysPeterson MichaelEVP and General CounselSSale−25.0K$74.59−$1.86M−79.4%6.50K after2 lots
Oct 29, 2024 (view filing)Oct 281 dayGuarino CarlDirectorSSale−7.56K$75.77−$573.1K−35.3%13.9K after
Oct 29, 2024 (view filing)Oct 281 dayMcCabe PhilipEVP - Head of Investment MgmtSSale−10.5K$75.91−$797.1K−19.4%43.5K after
Aug 30, 2024 (view filing)Aug 291 dayWest Alfred P JrExecutive ChairmanSSale−5.67K$67.50−$382.7K−0.1%7.50M after