---
schema_version: "secwatch.filing_event.v1"
accession: "0000350894-25-000126"
form_type: "8-K"
ticker: "SEIC"
cik: "0000350894"
company_name: "SEI INVESTMENTS CO"
filed_at: "2025-12-17T23:59:59+00:00"
generated_at: "2026-05-16T12:58:19.080922+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# SEI founder West resigns from board; Guarino named non-executive chairman; $0.52 dividend

## Summary
- Founder Alfred P. West Jr. resigns as director and officer effective Jan 1, 2026; to serve as non-voting Chairman Emeritus.
- Independent director Carl Guarino appointed non-executive Chairman of the Board, effective upon West's resignation.
- Board size reduced from nine to eight members effective Jan 1, 2026.
- Dividend of $0.52/share declared; record date Dec 29, 2025, payment date Jan 12, 2026.

## SEC filing metadata
- accession: 0000350894-25-000126
- form_type: 8-K
- ticker: SEIC
- cik: 0000350894
- company_name: SEI INVESTMENTS CO
- filed_at: 2025-12-17T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/350894/000035089425000126/0000350894-25-000126-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/350894/000035089425000126/seic-20251212.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000350894-25-000126
- JSON: https://secwatch.observer/filing/0000350894-25-000126.json
- Plain text: https://secwatch.observer/filing/0000350894-25-000126.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.