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Who owns SEI Investments (SEIC) stock

568 funds reported SEI Investments (SEIC) shares in their latest 13F filings, worth $8.5B in all. The largest holder is Vanguard Group ($908M). Last quarter 220 funds added to their stakes and 252 cut them.

Largest holders of SEIC (13F)Largest holders of SEIC (13F)Vanguard Group$908MBlackRock$871MLoomis Sayles & Co L P$744MVanguard Portfolio Management LLC$539MVanguard Capital Management LLC$411MState Street$373MMorgan Stanley$361MBoston Partners$271MGeode Capital Management, LLC$259MBank of America$255M

Largest holders (13F)

FundSharesValueChangeQuarter
Vanguard Group11,071,365$908Mdecrease2025-12-31
BlackRock9,927,545$871Mdecrease2026-06-30
Loomis Sayles & Co L P8,482,052$744Mdecrease2026-06-30
Vanguard Portfolio Management LLC6,140,822$539Mincrease2026-06-30
Vanguard Capital Management LLC4,686,241$411Mdecrease2026-06-30
State Street4,251,584$373Mincrease2026-06-30
Morgan Stanley4,119,203$361Mdecrease2026-06-30
Boston Partners3,093,791$271Mincrease2026-06-30
Geode Capital Management, LLC2,953,161$259Mincrease2026-06-30
Bank of America2,908,071$255Mdecrease2026-06-30
FMR LLC2,510,218$220Mincrease2026-06-30
Lord, Abbett & Co. LLC2,309,004$203Mincrease2026-06-30
Dimensional Fund Advisors LP1,962,762$172Mincrease2026-06-30
First Trust Advisors LP1,501,972$132Mdecrease2026-06-30
Invesco1,110,829$97.4Mdecrease2026-06-30

SEI Investments' latest quarter

SEI Investments, Q3 2026: revenue $662M (+14% year over year), operating margin 29.9%, net earnings $168M, operating cash flow $218M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most SEIC stock?

By the latest 13F filings: Vanguard Group ($908M); BlackRock ($871M); Loomis Sayles & Co L P ($744M); Vanguard Portfolio Management LLC ($539M); Vanguard Capital Management LLC ($411M).

What is the short interest in SEIC?

3,412,979 shares were sold short at the 2026-10-15 settlement, 10.39% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.