DOSSIER · 13F Holders · Q2 2026
SEI INVESTMENTS CO
4 institutions still hold SEI INVESTMENTS CO as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 784117953·4 13F holders·last filed Jun 30, 2026
AI Holders Summary · Q2 2026
4 institutions reported SEI INVESTMENTS CO in Q2 2026. SIMPLEX TRADING, LLC leads at 71.9% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.