Nasdaq · SEIC · stock
Sei Investments Co. (SEIC) stock price history
Every Nasdaq trading session of Sei Investments Co. from Mar 25, 1981 to Sep 28, 2026: 11,470 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
SEIC adjusted close, 1981 to 2026
- $111.63
- All time high, 2026
- $112.15
- 52 week high, $74.64 low
- 11,470
- Daily sessions since 1981
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 1981 to 2026 series and minute bars.
SEIC key facts
- Sei Investments Co. (SEIC) closed at $104.82 on Sep 28, 2026 on Nasdaq.
- SEIC's all time high close is $111.63, set on Aug 28, 2026; its all time low close is $0.1393 on Mar 25, 1981.
- SEIC's 52 week range is $74.64 to $112.15.
- SEIC returned +23.8% over the year to Sep 28, 2026 and +86.5% over five years.
- Over ten years SEIC returned +157%, +9.9% a year compounded.
- SEIC's deepest drawdown was -71.2% from Dec 24, 2007 to Mar 9, 2009.
- DataCedar holds 11,470 daily sessions of SEIC history from Mar 25, 1981 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
SEIC price chart, 1981 to 2026
SEIC returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -6.1% |
| 3 months | +20.1% |
| 6 months | +39.2% |
| Year to date | +26.8% |
| 1 year | +23.8% |
| 3 years | +80.7% |
| 5 years | +86.5% |
| 10 years | +156.6% |
| Since Mar 25, 1981 | +75,149% |
| Compound annual growth, 45.5 years | +15.7% |
SEIC records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $111.63 on Aug 28, 2026
- All time low close
- $0.1393 on Mar 25, 1981
- 52 week high
- $112.15 on Aug 28, 2026
- 52 week low
- $74.64 on Apr 7, 2026
- Deepest drawdown
- -71.2% from Dec 24, 2007 to Mar 9, 2009, recovered May 28, 2013
- Best single session
- +17.9% on Oct 28, 2008
- Worst single session
- -20.4% on Oct 26, 1987
- Volatility, 1 year annualised
- 23.0%
- Sessions closing higher, 1 year
- 52%
- Growth of 1 since 1981
- 752×
- Best calendar year
- 2000, +183%
- Worst calendar year
- 2008, -51%
SEIC price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 1981 starts on Mar 25, 1981; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $81.31 | $112.15 | $74.64 | $104.82 | +28.5% | 146.8M | 185 |
| 2025 | $81.66 | $92.84 | $63.52 | $81.54 | +0.6% | 195.1M | 250 |
| 2024 | $61.16 | $85.22 | $59.72 | $81.03 | +31.5% | 152.2M | 252 |
| 2023 | $56.26 | $62.53 | $50.27 | $61.63 | +10.6% | 130M | 250 |
| 2022 | $57.76 | $60.58 | $43.94 | $55.73 | -2.9% | 154.3M | 251 |
| 2021 | $53.60 | $61.05 | $48.50 | $57.42 | +7.4% | 129.9M | 252 |
| 2020 | $60.17 | $63.94 | $32.53 | $53.47 | -11.1% | 167.7M | 253 |
| 2019 | $41.21 | $61.35 | $40.12 | $60.15 | +43.4% | 153.6M | 252 |
| 2018 | $64.67 | $70.29 | $38.39 | $41.96 | -34.9% | 178.2M | 251 |
| 2017 | $44.34 | $64.94 | $42.54 | $64.47 | +47.0% | 139.7M | 251 |
| 2016 | $45.25 | $46.42 | $28.14 | $43.86 | -4.8% | 199.8M | 252 |
| 2015 | $34.84 | $48.53 | $33.11 | $46.06 | +32.1% | 169.9M | 252 |
| 2014 | $29.73 | $35.69 | $25.72 | $34.86 | +16.8% | 186.8M | 252 |
| 2013 | $20.30 | $30.06 | $20.08 | $29.85 | +50.8% | 184.4M | 252 |
| 2012 | $14.60 | $19.95 | $14.00 | $19.80 | +38.5% | 201.1M | 250 |
| 2011 | $19.47 | $20.20 | $11.21 | $14.29 | -26.0% | 249.7M | 252 |
| 2010 | $14.20 | $19.68 | $13.49 | $19.32 | +37.0% | 264.4M | 252 |
| 2009 | $12.52 | $16.34 | $7.33 | $14.10 | +13.2% | 360.9M | 252 |
| 2008 | $25.29 | $25.69 | $9.23 | $12.46 | -50.9% | 290.9M | 253 |
| 2007 | $23.26 | $26.13 | $17.71 | $25.38 | +8.3% | 234.9M | 251 |
| 2006 | $14.53 | $23.84 | $14.11 | $23.44 | +61.7% | 242.5M | 251 |
| 2005 | $16.25 | $16.55 | $12.34 | $14.49 | -11.2% | 186.3M | 252 |
| 2004 | $11.81 | $16.87 | $10.42 | $16.33 | +38.8% | 242.1M | 252 |
| 2003 | $10.54 | $14.14 | $8.61 | $11.76 | +12.4% | 275.7M | 252 |
| 2002 | $16.93 | $17.63 | $7.23 | $10.47 | -39.4% | 290.1M | 252 |
| 2001 | $20.86 | $20.99 | $10.04 | $17.28 | -19.3% | 318.1M | 248 |
| 2000 | $7.67 | $24.03 | $5.65 | $21.41 | +183.3% | 260.9M | 252 |
| 1999 | $6.22 | $8.19 | $4.91 | $7.56 | +19.9% | 153.9M | 252 |
| 1998 | $2.66 | $6.37 | $2.34 | $6.30 | +137.1% | 207M | 252 |
| 1997 | $1.40 | $2.81 | $1.18 | $2.66 | +89.7% | 173.6M | 253 |
| 1996 | $1.41 | $1.65 | $1.12 | $1.40 | +2.9% | 225.1M | 254 |
| 1995 | $1.08 | $1.53 | $1.04 | $1.36 | +26.7% | 179M | 252 |
| 1994 | $1.64 | $1.78 | $1.04 | $1.08 | -34.3% | 127M | 252 |
| 1993 | $0.9634 | $1.70 | $0.8314 | $1.64 | +65.9% | 121M | 253 |
| 1992 | $0.8059 | $0.9919 | $0.6829 | $0.9867 | +22.4% | 245.8M | 254 |
| 1991 | $0.6686 | $0.8510 | $0.5488 | $0.8059 | +20.5% | 223.4M | 253 |
| 1990 | $0.5481 | $0.6879 | $0.4477 | $0.6686 | +22.0% | 146.9M | 253 |
| 1989 | $0.5372 | $0.6158 | $0.4873 | $0.5481 | +2.0% | 168.3M | 252 |
| 1988 | $0.5190 | $0.6581 | $0.4198 | $0.5372 | +3.5% | 256.6M | 253 |
| 1987 | $0.2824 | $0.5419 | $0.2824 | $0.5190 | +83.8% | 306.9M | 253 |
| 1986 | $0.3587 | $0.4236 | $0.2328 | $0.2824 | -21.3% | 310.3M | 253 |
| 1985 | $0.2175 | $0.3626 | $0.2023 | $0.3587 | +64.9% | 289.5M | 252 |
| 1984 | $0.3893 | $0.4122 | $0.1603 | $0.2175 | -44.1% | 236.7M | 253 |
| 1983 | $0.2977 | $0.5152 | $0.2920 | $0.3893 | +30.8% | 166.7M | 253 |
| 1982 | $0.1870 | $0.3511 | $0.1622 | $0.2977 | +59.2% | 121.3M | 253 |
| 1981 | $0.1393 | $0.2175 | $0.1393 | $0.1870 | n/a | 150.3M | 196 |
SEIC monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | $104.82 | -5.6% |
| August 2026 | $110.98 | +7.8% |
| July 2026 | $102.98 | +17.4% |
| June 2026 | $87.71 | +0.4% |
| May 2026 | $87.37 | -3.1% |
| April 2026 | $90.15 | +15.6% |
| March 2026 | $78.01 | -3.5% |
| February 2026 | $80.85 | -7.4% |
| January 2026 | $87.34 | +7.1% |
| December 2025 | $81.54 | +2.1% |
| November 2025 | $79.90 | +0.3% |
| October 2025 | $79.65 | -5.0% |
About the SEIC data
Daily bars. 11,470 sessions from Mar 25, 1981 to Sep 28, 2026, one row per Nasdaq trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Sep 28, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are Nasdaq trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Mar 25, 1981, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/SEIC/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq
Common questions
SEIC share price history
