---
schema_version: "secwatch.filing_event.v1"
accession: "0000350894-25-000088"
form_type: "8-K"
ticker: "SEIC"
cik: "0000350894"
company_name: "SEI INVESTMENTS CO"
filed_at: "2025-07-01T23:59:59+00:00"
generated_at: "2026-05-18T11:02:55.972200+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# SEI closes sale of Family Office Services to Aquiline Capital Partners effective June 30, 2025

## Summary
- Transaction closed effective June 30, 2025; Aquiline Capital Partners acquires SEI's Family Office Services business.
- Definitive agreement was previously disclosed on February 27, 2025; financial terms not disclosed in the filing.
- Aquiline will continue enhancement of the Archway Platform and drive industry adoption per forward-looking statements.
- SEI's CEO and CFO are not quoted; no guidance or material financial impact provided.

## SEC filing metadata
- accession: 0000350894-25-000088
- form_type: 8-K
- ticker: SEIC
- cik: 0000350894
- company_name: SEI INVESTMENTS CO
- filed_at: 2025-07-01T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/350894/000035089425000088/0000350894-25-000088-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/350894/000035089425000088/seic-20250630.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000350894-25-000088
- JSON: https://secwatch.observer/filing/0000350894-25-000088.json
- Plain text: https://secwatch.observer/filing/0000350894-25-000088.txt

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