SEI Investments Company (SEIC) Ownership
SEIC ownership summary
as of October 18, 2026- Institutions
- 77.9% of shares outstanding
- Insiders
- 15.63% of shares outstanding
- Shares outstanding
- 120.0M
- Float
- 99.4M shares available to trade
- Short interest
- 2.67% 3.1M shares short
- Days to cover
- 3.54 short interest up 32.6% vs prior month
- Institutions 77.86%
- Insiders 15.63%
- Other investors 6.51%
SEIC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.27% | 9.9M | $1.04B | −182,792 (−1.8%) | June 30, 2026 |
| 2 | Loomis, Sayles & Company LP | 7.07% | 8.5M | $885.5M | −146,827 (−1.7%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.12% | 6.1M | $641.1M | +15,179 (+0.2%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 3.90% | 4.7M | $489.2M | −55,475 (−1.2%) | June 30, 2026 |
| 5 | State Street Corp | 3.54% | 4.3M | $443.9M | +66,406 (+1.6%) | June 30, 2026 |
| 6 | Morgan Stanley - Brokerage Accounts | 3.43% | 4.1M | $430.0M | −673,076 (−14.0%) | June 30, 2026 |
| 7 | Boston Partners Global Investors, Inc | 2.58% | 3.1M | $323.0M | +1.3M (+74.8%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.46% | 3.0M | $308.3M | +122,829 (+4.3%) | June 30, 2026 |
| 9 | Bank of America Corp | 2.42% | 2.9M | $303.6M | −12,435 (−0.4%) | June 30, 2026 |
| 10 | FMR Inc | 2.09% | 2.5M | $262.1M | +417,719 (+20.0%) | June 30, 2026 |
| 11 | Lord, Abbett & Co LLC | 1.92% | 2.3M | $241.1M | +104,625 (+4.7%) | June 30, 2026 |
| 12 | Dimensional Fund Advisors, Inc. | 1.64% | 2.0M | $204.9M | +89,564 (+4.8%) | June 30, 2026 |
| 13 | First Trust Advisors L.P. | 1.25% | 1.5M | $156.8M | −320,697 (−17.6%) | June 30, 2026 |
| 14 | Beutel, Goodman & Company Ltd. | 1.25% | 1.5M | $156.0M | −278,470 (−15.7%) | June 30, 2026 |
| 15 | Amvescap Plc. | 0.93% | 1.1M | $116.0M | −34,575 (−3.0%) | June 30, 2026 |
| 16 | Royce & Associates, LP | 0.88% | 1.1M | $109.6M | +53,831 (+5.4%) | June 30, 2026 |
| 17 | Caisse De Depot Et Placement Du Quebec | 0.84% | 1.0M | $104.7M | −195,644 (−16.3%) | June 30, 2026 |
| 18 | BTIM Corp | 0.83% | 991K | $103.5M | −48,431 (−4.7%) | June 30, 2026 |
| 19 | Northern Trust Corp | 0.76% | 915K | $95.5M | +9,300 (+1.0%) | June 30, 2026 |
| 20 | Bank of New York Mellon Corp | 0.74% | 894K | $93.4M | −42,108 (−4.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 9 holders added 2.2M shares and 11 cut 2.0M.
SEIC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Mid-Cap ETF | 3.10% | 3.7M | $388.3M | −1,332 (−0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.87% | 3.4M | $359.3M | −3,680 (−0.1%) | August 31, 2026 |
| 3 | Eaton Vance Atlanta Capital SMID-Cap I | 2.33% | 2.8M | $292.5M | −18,000 (−0.6%) | August 31, 2026 |
| 4 | Vanguard Small Cap Index | 2.03% | 2.4M | $253.8M | −59,094 (−2.4%) | September 30, 2026 |
| 5 | Loomis Sayles Growth Y | 1.68% | 2.0M | $210.6M | −43,447 (−2.1%) | August 31, 2026 |
| 6 | JHancock Disciplined Value Mid Cap I | 1.63% | 2.0M | $204.7M | −47,971 (−2.4%) | August 31, 2026 |
| 7 | Vanguard MStar Small Cap Value Index | 1.32% | 1.6M | $165.2M | +592 (+0.0%) | September 30, 2026 |
| 8 | Lord Abbett Affiliated A | 0.94% | 1.1M | $117.7M | +90,240 (+8.7%) | August 31, 2026 |
| 9 | Fidelity Low-Priced Stock | 0.74% | 892K | $93.1M | — | July 31, 2026 |
| 10 | Invesco S&P MidCap Quality ETF | 0.73% | 880K | $91.8M | +920 (+0.1%) | September 30, 2026 |
| 11 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.64% | 772K | $80.6M | +103,583 (+15.5%) | September 30, 2026 |
| 12 | State Street® SPDR® S&P® Dividend ETF | 0.62% | 740K | $77.3M | — | September 30, 2026 |
| 13 | Loomis Sayles US Growth Eq I/A USD | 0.60% | 721K | $75.2M | +29,352 (+4.2%) | August 31, 2026 |
| 14 | Strategic Advisers Fidelity US TtlStk | 0.50% | 604K | $63.1M | +3,599 (+0.6%) | August 31, 2026 |
| 15 | Vanguard Dividend Appreciation ETF | 0.49% | 591K | $61.7M | +73,337 (+14.2%) | September 30, 2026 |
| 16 | First Trust SMID Cp Rising Div Achv ETF | 0.48% | 582K | $60.7M | — | September 30, 2026 |
| 17 | State Street SPDR Port S&P 400 Md CpETF | 0.46% | 552K | $57.6M | −776 (−0.1%) | September 30, 2026 |
| 18 | Neuberger Genesis Inv | 0.44% | 528K | $55.1M | +528,225 (0.0%) | September 30, 2026 |
| 19 | Strategic Advisers U.S. Total Stock | 0.41% | 495K | $51.7M | −16,770 (−3.3%) | August 31, 2026 |
| 20 | Lord Abbett Fundamental Equity C | 0.39% | 468K | $48.9M | −2,770 (−0.6%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SEIC insider transactions
latest 16| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-23 | Philip Mccabe | Sell | $91.82 | 15,000 | $1.4M |
| 2026-04-23 | Sanjay Sharma | Sell | $90.12 | 25,000 | $2.3M |
| 2026-03-11 | Alfred P West Jr | Sell | $79.26 | 7,447 | $590,249 |
| 2026-03-10 | Alfred P West Jr | Sell | $80.23 | 55,000 | $4.4M |
| 2026-02-25 | Mark Andrew Warner | Sell | $81.74 | 4,000 | $326,960 |
| 2026-01-29 | Ryan Hicke | Sell | $87.36 | 80,000 | $7.0M |
| 2025-12-03 | Alfred P West Jr | Sell | $80.87 | 24,770 | $2.0M |
| 2025-09-29 | Kathryn Mccarthy | Sell | $85.66 | 10,000 | $856,600 |
| 2025-09-23 | Carl Guarino | Sell | $86.41 | 10,000 | $864,100 |
| 2025-08-19 | Ryan Hicke | Sell | $88.30 | 35,000 | $3.1M |
| 2025-07-29 | Mark Andrew Warner | Sell | $88.75 | 5,000 | $443,750 |
| 2025-05-29 | Alfred P West Jr | Sell | $84.28 | 66,126 | $5.6M |
| 2025-05-28 | Alfred P West Jr | Sell | $85.78 | 75,000 | $6.4M |
| 2025-05-15 | Michael Peterson | Sell | $84.27 | 50,000 | $4.2M |
| 2025-05-14 | Ryan Hicke | Sell | $83.36 | 21,000 | $1.8M |
| 2025-05-14 | Sanjay Sharma | Sell | $83.40 | 20,000 | $1.7M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SEIC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SEIC
Institutional investors own 77.9% of SEI Investments's shares and insiders 15.63%. The largest holder is BlackRock Inc with 8.27% of the shares (9.9M), as of June 30, 2026. Among the top 20 institutions, 9 added shares and 11 reduced their stake in the latest filings. Short interest is 2.67% of the float, or 3.54 days of average trading volume. The share count fell 26.9% since 2014.
Related: SEIC analyst forecast, SEIC key metrics, SEIC dividend history. See the SEIC stock overview for the latest quote and news.
SEIC ownership FAQ
Who owns the most SEI Investments stock?
The largest shareholders of SEI Investments are BlackRock Inc (8.27%), Loomis, Sayles & Company LP (7.07%), Vanguard Portfolio Management, LLC (5.12%), Vanguard Capital Management, LLC (3.90%), State Street Corp (3.54%).
What percentage of SEI Investments is owned by institutions?
Institutions hold 77.9% of SEI Investments's shares outstanding; insiders hold 15.63%.
Which funds own SEI Investments?
The largest fund holders of SEI Investments are iShares Core S&P Mid-Cap ETF (3.10%), Vanguard MStar Total Stk Mkt Idx Invest (2.87%), Eaton Vance Atlanta Capital SMID-Cap I (2.33%), Vanguard Small Cap Index (2.03%), Loomis Sayles Growth Y (1.68%).
What is SEI Investments's short interest?
3.1M shares of SEI Investments were sold short, 2.67% of the float; at the average daily volume it would take 3.54 days to cover.
Are insiders buying or selling SEI Investments?
Of the latest 16 reported insider transactions in SEI Investments (since May 14, 2025), 0 were purchases and 16 were sales.
How many shares of SEI Investments are outstanding?
SEI Investments has 120.0M shares outstanding, of which 99.4M are in the public float.