Company · CIK 0000350894 · SIC 6211 — Security Brokers, Dealers & Flotation Companies · Nasdaq
SEI INVESTMENTS CO · SEIC
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 22, 2026 SForm 4 → | Sep 24, 4:15 pm EDT | Michael LaneExecutive Vice President | 2,400 | $102.78 | $246,672 | 39,581 | −5.72% | |
| Sep 3, 2026 SForm 4 → | Sep 8, 4:05 pm EDT | Ryan HickeChief Executive Officer | 37,500 | $110.71 | $4,151,663 | 192,815 | −16.3% | |
| Sep 3, 2026 MForm 4 → | Sep 8, 4:05 pm EDT | Ryan HickeChief Executive Officer | 37,500 | $56.98 | $2,136,825 | 230,315 | — | |
| Sep 1, 2026 SForm 4 → | Sep 3, 4:09 pm EDT | Carmen RomeoDirector | 5,000 | $109.70 | $548,500 | 1,560,293 | −0.32% | |
| Sep 1, 2026 MForm 4 → | Sep 3, 4:09 pm EDT | Carmen RomeoDirector | 5,000 | $49.63 | $248,150 | 1,565,293 | — | |
| Aug 28, 2026 SForm 4 → | Sep 1, 4:05 pm EDT | Michael PetersonExecutive Vice President | 37,500 | $111.51 | $4,181,625 | 20,148 | −65.0% | |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:05 pm EDT | Michael PetersonExecutive Vice President | 37,500 | $56.54 | $2,120,250 | 57,648 | — | |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:23 pm EDT | Philip McCabeSee Remarks | 30,000 | $105.12 | $3,153,470 | 54,884 | −35.3% | |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:23 pm EDT | Philip McCabeSee Remarks | 30,000 | $49.63 | $1,488,900 | 59,927 | — | |
| Aug 3, 2026 SForm 4 → | Aug 4, 4:24 pm EDT | Kathryn McCarthyDirector | 10,000 | $103.54 | $1,035,350 | 77,883 | −11.4% | |
| Aug 3, 2026 MForm 4 → | Aug 4, 4:24 pm EDT | Kathryn McCarthyDirector | 10,000 | $71.12 | $711,200 | 87,883 | — | |
| Jul 28, 2026 SForm 4 → | Jul 30, 4:06 pm EDT | Mark Andrew WarnerSee Remarks* | 15,000 | $102.35 | $1,535,193 | 921 | −94.2% | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:06 pm EDT | Mark Andrew WarnerSee Remarks* | 15,000 | $59.17 | $887,550 | 15,921 | — | |
| Jul 28, 2026 SForm 4 → | Jul 30, 4:06 pm EDT | Michael PetersonExecutive Vice President | 25,000 | $102.05 | $2,551,250 | 20,148 | −55.4% | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:06 pm EDT | Michael PetersonExecutive Vice President | 25,000 | $55.73 | $1,393,250 | 45,148 | — | |
| Jul 28, 2026 SForm 4 → | Jul 30, 4:05 pm EDT | Carl GuarinoDirector | 10,000 | $103.20 | $1,031,950 | 18,308 | −35.3% | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:05 pm EDT | Carl GuarinoDirector | 10,000 | $49.63 | $496,300 | 28,308 | — | |
| Jul 24, 2026 SForm 4 → | Jul 28, 4:08 pm EDT | Sanjay SharmaSee Remarks* | 20,000 | $99.33 | $1,986,588 | 39,829 | −33.4% | |
| Jul 24, 2026 MForm 4 → | Jul 28, 4:08 pm EDT | Sanjay SharmaSee Remarks* | 20,000 | $71.12 | $1,422,400 | 59,829 | — | |
| Jul 24, 2026 FForm 4 → | Jul 28, 4:07 pm EDT | Sneha S. ShahSee Remarks* | 3,746 | $96.73 | $362,351 | 14,092 | — | |
| Jun 26, 2026 SForm 4 → | Jun 29, 1:55 pm EDT | Alfred P West Jr.Other | 57,332 | $87.26 | $5,002,998 | 6,818,451 | −0.83% | |
| Jun 9, 2026 SForm 4 → | Jun 11, 10:23 am EDT | William DoranDirector | 5,000 | $90.50 | $452,500 | 618,802 | −0.80% |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 3, 2026 MForm 4 → | Sep 8, 4:05 pm EDT | Ryan HickeChief Executive Officer | 37,500 | — | — | 0 | — | |
| Sep 1, 2026 MForm 4 → | Sep 3, 4:09 pm EDT | Carmen RomeoDirector | 5,000 | — | — | 0 | — | |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:05 pm EDT | Michael PetersonExecutive Vice President | 37,500 | — | — | 0 | — | |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:23 pm EDT | Philip McCabeSee Remarks | 30,000 | — | — | 0 | — | |
| Aug 3, 2026 MForm 4 → | Aug 4, 4:24 pm EDT | Kathryn McCarthyDirector | 10,000 | — | — | 0 | — | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:06 pm EDT | Mark Andrew WarnerSee Remarks* | 15,000 | — | — | 0 | — | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:06 pm EDT | Michael PetersonExecutive Vice President | 25,000 | — | — | 0 | — | |
| Jul 28, 2026 MForm 4 → | Jul 30, 4:05 pm EDT | Carl GuarinoDirector | 10,000 | — | — | 0 | — | |
| Jul 24, 2026 MForm 4 → | Jul 28, 4:08 pm EDT | Sanjay SharmaSee Remarks* | 20,000 | — | — | 0 | — |