SEI Investments
SEIC · NASDAQ
$107.15+$2.36 (+2.25%)TodayMarket closed ·
Prev close $104.79
Who owns SEIC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 46.7% of SEIC’s shares.
- West (Loralee)9.3%
- Loomis, Sayles & Company, L.P.7.1%
- BlackRock Institutional Trust Company, N.A.6.9%
- Vanguard Portfolio Management, LLC5.1%
- Next 6 largest institutions18.3%
- All other shareholders53.3%
| Holder | Shares | % of shares |
|---|---|---|
| West (Loralee) | 11.14M | 9.28% |
| Loomis, Sayles & Company, L.P. | 8.48M | 7.07% |
| BlackRock Institutional Trust Company, N.A. | 8.26M | 6.88% |
| Vanguard Portfolio Management, LLC | 6.14M | 5.12% |
| Vanguard Capital Management, LLC | 4.69M | 3.90% |
| State Street Investment Management (US) | 4.25M | 3.54% |
| Atlanta Capital Management Company, L.L.C. | 3.74M | 3.12% |
| West (Alfred Paul JR) | 3.25M | 2.71% |
| Boston Partners | 3.09M | 2.58% |
| Geode Capital Management, L.L.C. | 2.95M | 2.46% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 3.45M | 2.87% |
| iShares Core S&P Mid-Cap ETF | 3.20M | 2.67% |
| Eaton Vance-Atlanta Capital SMID-Cap Fund | 2.82M | 2.35% |
| Vanguard Small-Cap Index Fund | 2.49M | 2.07% |
| Loomis Sayles Growth Fund | 2.06M | 1.72% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $30.18M (22 trades) of SEIC on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| WEST ALFRED P JR | Sale | 5.48K | $565.64K |
| WEST ALFRED P JR | Sale | 28.39K | $2.94M |
| LANE MICHAEL | Sale | 2.40K | $246.67K |
| Hicke Ryan | Option exercise | 20.00K | — |
| Hicke Ryan | Option exercise | 17.50K | — |
| Hicke Ryan | Sale | 37.50K | $4.15M |
| Hicke Ryan | Option exercise | 20.00K | $1.29M |
| Hicke Ryan | Option exercise | 17.50K | $848.23K |
| ROMEO CARMEN | Option exercise | 5.00K | — |
| ROMEO CARMEN | Sale | 5.00K | $548.50K |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.09M
- Days to cover
- 3.00
- % of shares outstanding
- 2.58%
- Average daily volume
- 1.03M
- Change since last report
- +32.6%
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