SEIC SCHEDULE 13G/A: SEC filing
Loomis Sayles & Co., L.P.
Filed with the SEC on · accession 0000312348-26-000038
SEIC filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 12, 2026. A report the company filed with the SEC (the US market regulator).
Summary of the filing
Loomis Sayles & Co., L.P. filed an amended Schedule 13G indicating it beneficially owns 7,803,457.35 shares (6.5%) of SEI Investments Co common stock as of September 30, 2026, with sole voting power over 6,477,211 shares and sole dispositive power over all 7,803,457.35 shares.
Key details
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What did SEIC file with the SEC on Nov 12, 2026?
SEIC filed a SCHEDULE 13G/A (SEC filing). Loomis Sayles & Co., L.P. filed an amended Schedule 13G indicating it beneficially owns 7,803,457.35 shares (6.5%) of SEI Investments Co common stock as of September 30, 2026, with sole voting power over 6,477,211 shares and sole dispositive power over all 7,803,457.35 shares.
How do I read a SCHEDULE 13G/A?
A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).
Other SEIC SEC filings
- SCHEDULE 13G/A · SEC filingOct 27, 2026
- 10-Q · SEC filingOct 26, 2026
- 8-K · SEC filingOct 21, 2026
- SCHEDULE 13G/A · SEC filingAug 14, 2026
- 10-Q · SEC filingJul 27, 2026
- 8-K · SEC filingJul 22, 2026
- 8-K · Dividend changeMay 28, 2026
- 10-Q · SEC filingApr 27, 2026
- 8-K · SEC filingApr 22, 2026
- DEF 14A · Board changeApr 15, 2026
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