SEI Investments (SEIC) Historical Monthly & Quarterly Returns
Dividend-adjusted returns by month and quarter. Compare performance across years.
SEI Investments
SEIC
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +7.1% | 7.4% | 3.5% | 1.9% | — | — | — | — | — | — | — | — |
| 2025 | +5.0% | 7.5% | 3.0% | +0.9% | +8.9% | +6.0% | 1.9% | +0.2% | 3.9% | 5.0% | +0.3% | +2.1% |
| 2024 | 0.5% | +6.3% | +6.9% | 8.3% | +2.7% | 3.8% | +4.9% | 0.3% | +2.3% | +8.0% | +10.5% | +0.4% |
| 2023 | +7.1% | 3.5% | 4.5% | +2.3% | 4.0% | +6.2% | +5.6% | 1.5% | 2.9% | 10.9% | +9.3% | +9.1% |
| 2022 | 3.8% | 0.1% | +2.8% | 7.5% | +4.9% | 6.9% | +2.5% | 1.2% | 10.3% | +10.7% | +14.7% | 5.7% |
| 2021 | 8.0% | +6.0% | +8.8% | +0.8% | +3.3% | 1.8% | 1.9% | +3.3% | 5.6% | +6.3% | 5.4% | +2.9% |
| 2020 | 0.3% | 16.2% | 15.3% | +10.0% | +6.4% | +2.1% | 4.8% | +0.1% | 3.1% | 3.1% | +7.3% | +9.7% |
| 2019 | +2.9% | +11.0% | 0.9% | +4.2% | 7.7% | +12.3% | +6.2% | 3.5% | +3.0% | +1.1% | +7.7% | +2.0% |
| 2018 | +4.6% | 3.1% | +2.9% | 15.6% | +0.9% | 1.5% | 4.1% | +5.2% | 3.1% | 12.5% | +0.5% | 13.3% |
| 2017 | 1.7% | +3.8% | +0.2% | +0.6% | 1.2% | +7.4% | +5.1% | +3.4% | +4.5% | +5.6% | +9.1% | +2.6% |
| 2016 | 25.1% | 2.7% | +12.8% | +11.7% | +7.0% | 6.0% | 6.5% | +2.5% | 1.1% | 2.8% | +6.4% | +5.2% |
| 2015 | +0.3% | +7.2% | +2.4% | +3.6% | +4.8% | +3.0% | +8.7% | 5.1% | 4.6% | +7.4% | +5.0% | 3.2% |
| 2014 | 2.0% | 1.4% | +0.1% | 3.7% | +1.7% | +0.2% | +9.3% | +5.8% | 4.6% | +6.9% | +2.5% | +1.6% |
| 2013 | +15.5% | +4.8% | +2.1% | 0.6% | +6.8% | 6.5% | +11.2% | 5.9% | +3.9% | +7.4% | +1.2% | +4.1% |
| 2012 | +5.9% | +7.5% | +4.8% | 2.4% | 11.3% | +12.0% | +6.5% | +2.7% | 1.4% | +1.9% | +0.7% | +8.3% |
| 2011 | 2.7% | 0.6% | +3.8% | 6.4% | +5.8% | 4.2% | 12.1% | 13.5% | 10.1% | +5.3% | +3.8% | +4.1% |
| 2010 | +1.1% | 0.6% | +24.8% | +2.2% | 6.1% | 3.0% | 5.8% | 7.7% | +14.9% | +8.9% | +2.0% | +5.8% |
| 2009 | 18.9% | 6.6% | +3.0% | +14.9% | +10.0% | +17.4% | +4.8% | 2.5% | +6.8% | 11.2% | +0.2% | +0.6% |
| 2008 | 13.7% | 9.7% | 1.3% | 5.7% | +3.7% | 2.2% | 2.1% | +2.5% | 6.0% | 20.4% | 12.6% | +1.6% |
| 2007 | +4.6% | 2.9% | 0.3% | +1.3% | +1.1% | 5.7% | 6.1% | 6.9% | +7.6% | +15.9% | 1.9% | +3.7% |
| 2006 | +11.5% | +1.2% | 3.0% | +5.9% | +5.8% | +7.9% | +0.0% | +4.4% | +10.1% | +0.1% | +3.4% | +2.6% |
| 2005 | 10.8% | 1.1% | 2.2% | 9.2% | +5.9% | +7.8% | +3.5% | 6.5% | +3.9% | +3.2% | +5.3% | 9.2% |
| 2004 | +11.5% | +5.4% | 7.6% | 10.5% | 0.1% | 1.2% | +5.6% | +6.6% | +3.0% | +6.9% | +8.7% | +7.3% |
| 2003 | 6.1% | 1.1% | +3.9% | +0.5% | +10.3% | +10.4% | +9.3% | 0.3% | 6.6% | 10.6% | 3.1% | +8.1% |
| 2002 | 10.4% | 1.7% | +7.9% | 21.3% | 1.9% | 14.6% | 6.6% | +10.2% | 17.6% | +11.7% | +19.4% | 14.5% |
| 2001 | 26.2% | +3.4% | 27.0% | +28.6% | +1.6% | +16.4% | +1.1% | 14.4% | 22.0% | 3.9% | +31.7% | +11.4% |
| 2000 | 12.2% | 14.4% | +27.1% | +5.2% | +17.4% | 14.7% | +37.7% | +15.9% | +11.4% | +28.3% | 1.9% | +25.8% |
| 1999 | +15.8% | 13.9% | 6.6% | +2.9% | +7.2% | 13.4% | +9.7% | 5.0% | 2.9% | +9.1% | +4.2% | +17.3% |
| 1998 | +14.5% | +23.1% | +15.6% | +8.2% | 9.7% | 6.8% | +20.6% | 16.8% | +11.5% | +19.5% | +11.3% | +7.6% |
| 1997 | 9.9% | +10.2% | 5.0% | +0.0% | +6.7% | +7.7% | +20.8% | +0.0% | +13.4% | +28.9% | 2.6% | +1.5% |
| 1996 | +2.9% | +1.4% | 1.4% | +5.6% | 7.9% | 2.9% | 5.2% | +6.3% | +9.6% | 12.8% | +10.0% | 0.7% |
| 1995 | +1.8% | +8.0% | +0.0% | 1.7% | +2.5% | +17.2% | 3.5% | +2.2% | 7.1% | +3.1% | +1.5% | +1.5% |
| 1994 | 6.7% | +0.7% | 2.8% | 0.7% | 26.5% | +10.0% | 4.5% | +22.9% | +0.8% | 2.3% | 9.4% | 4.3% |
| 1993 | 9.8% | 0.8% | +1.7% | 0.8% | +12.6% | 5.0% | +11.8% | +6.0% | +10.7% | +19.3% | +3.7% | +6.4% |
| 1992 | +16.7% | +5.6% | 9.0% | 7.4% | +3.6% | 17.7% | +1.6% | 1.1% | +9.6% | +8.6% | +7.9% | +7.5% |
| 1991 | 12.5% | +20.8% | +6.3% | 2.9% | +6.0% | +2.9% | 4.6% | +2.9% | +7.5% | 15.8% | +0.0% | +11.7% |
| 1990 | 14.1% | +4.9% | +14.1% | +6.8% | +1.3% | +5.2% | +0.0% | 10.8% | 17.6% | +4.9% | +12.5% | +30.0% |
| 1989 | 4.3% | 3.0% | +4.6% | 5.1% | +3.1% | +2.6% | +9.6% | +0.7% | +4.7% | 6.4% | 0.7% | 2.5% |
| 1988 | 8.8% | +0.0% | +6.5% | +6.1% | 2.9% | +23.8% | 10.7% | +1.3% | 1.3% | 8.0% | +0.0% | +1.7% |
| 1987 | +31.1% | 1.0% | +8.3% | +7.7% | +20.5% | 0.7% | 3.0% | +4.6% | 4.4% | 12.3% | 12.3% | +36.0% |
| 1986 | +1.1% | +15.3% | 12.3% | +2.1% | 10.7% | 18.9% | 12.7% | +24.2% | 14.3% | +15.1% | +0.0% | 2.6% |
| 1985 | +13.2% | +10.1% | +2.8% | 2.7% | 2.8% | +5.8% | +1.4% | 1.3% | +0.7% | +6.1% | +15.4% | +4.4% |
| 1984 | 13.7% | 11.4% | 14.1% | 20.9% | +1.9% | +11.1% | 6.7% | +3.6% | 24.1% | +20.5% | +3.8% | +3.6% |
| 1983 | +22.4% | 0.5% | +0.0% | +34.7% | 3.9% | 3.3% | 22.7% | +7.6% | +29.3% | 17.2% | +0.0% | 3.8% |
| 1982 | 1.0% | +3.1% | 7.0% | +16.1% | 9.3% | 5.1% | 7.5% | +9.3% | +14.9% | +33.3% | +19.4% | 9.3% |
| 1981 | — | — | +1.4% | +29.7% | +13.5% | 21.1% | +8.1% | 2.2% | 13.2% | +22.8% | +6.2% | 4.9% |
| Avg | 0.6% | +1.1% | +1.1% | +1.7% | +1.8% | +0.6% | +1.6% | +1.1% | 0.1% | +3.8% | +4.3% | +3.9% |
| Median | 0.5% | 0.1% | +0.8% | +0.7% | +2.7% | 0.7% | +1.1% | +0.7% | 1.1% | +5.3% | +3.7% | +2.6% |
| Win % | 47% | 47% | 54% | 54% | 67% | 49% | 51% | 56% | 49% | 64% | 71% | 73% |
2026
Jan+7.1%
Feb7.4%
Mar3.5%
Apr1.9%
May—
Jun—
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan+5.0%
Feb7.5%
Mar3.0%
Apr+0.9%
May+8.9%
Jun+6.0%
Jul1.9%
Aug+0.2%
Sep3.9%
Oct5.0%
Nov+0.3%
Dec+2.1%
2024
Jan0.5%
Feb+6.3%
Mar+6.9%
Apr8.3%
May+2.7%
Jun3.8%
Jul+4.9%
Aug0.3%
Sep+2.3%
Oct+8.0%
Nov+10.5%
Dec+0.4%
2023
Jan+7.1%
Feb3.5%
Mar4.5%
Apr+2.3%
May4.0%
Jun+6.2%
Jul+5.6%
Aug1.5%
Sep2.9%
Oct10.9%
Nov+9.3%
Dec+9.1%
2022
Jan3.8%
Feb0.1%
Mar+2.8%
Apr7.5%
May+4.9%
Jun6.9%
Jul+2.5%
Aug1.2%
Sep10.3%
Oct+10.7%
Nov+14.7%
Dec5.7%
2021
Jan8.0%
Feb+6.0%
Mar+8.8%
Apr+0.8%
May+3.3%
Jun1.8%
Jul1.9%
Aug+3.3%
Sep5.6%
Oct+6.3%
Nov5.4%
Dec+2.9%
2020
Jan0.3%
Feb16.2%
Mar15.3%
Apr+10.0%
May+6.4%
Jun+2.1%
Jul4.8%
Aug+0.1%
Sep3.1%
Oct3.1%
Nov+7.3%
Dec+9.7%
2019
Jan+2.9%
Feb+11.0%
Mar0.9%
Apr+4.2%
May7.7%
Jun+12.3%
Jul+6.2%
Aug3.5%
Sep+3.0%
Oct+1.1%
Nov+7.7%
Dec+2.0%
2018
Jan+4.6%
Feb3.1%
Mar+2.9%
Apr15.6%
May+0.9%
Jun1.5%
Jul4.1%
Aug+5.2%
Sep3.1%
Oct12.5%
Nov+0.5%
Dec13.3%
2017
Jan1.7%
Feb+3.8%
Mar+0.2%
Apr+0.6%
May1.2%
Jun+7.4%
Jul+5.1%
Aug+3.4%
Sep+4.5%
Oct+5.6%
Nov+9.1%
Dec+2.6%
2016
Jan25.1%
Feb2.7%
Mar+12.8%
Apr+11.7%
May+7.0%
Jun6.0%
Jul6.5%
Aug+2.5%
Sep1.1%
Oct2.8%
Nov+6.4%
Dec+5.2%
2015
Jan+0.3%
Feb+7.2%
Mar+2.4%
Apr+3.6%
May+4.8%
Jun+3.0%
Jul+8.7%
Aug5.1%
Sep4.6%
Oct+7.4%
Nov+5.0%
Dec3.2%
2014
Jan2.0%
Feb1.4%
Mar+0.1%
Apr3.7%
May+1.7%
Jun+0.2%
Jul+9.3%
Aug+5.8%
Sep4.6%
Oct+6.9%
Nov+2.5%
Dec+1.6%
2013
Jan+15.5%
Feb+4.8%
Mar+2.1%
Apr0.6%
May+6.8%
Jun6.5%
Jul+11.2%
Aug5.9%
Sep+3.9%
Oct+7.4%
Nov+1.2%
Dec+4.1%
2012
Jan+5.9%
Feb+7.5%
Mar+4.8%
Apr2.4%
May11.3%
Jun+12.0%
Jul+6.5%
Aug+2.7%
Sep1.4%
Oct+1.9%
Nov+0.7%
Dec+8.3%
2011
Jan2.7%
Feb0.6%
Mar+3.8%
Apr6.4%
May+5.8%
Jun4.2%
Jul12.1%
Aug13.5%
Sep10.1%
Oct+5.3%
Nov+3.8%
Dec+4.1%
2010
Jan+1.1%
Feb0.6%
Mar+24.8%
Apr+2.2%
May6.1%
Jun3.0%
Jul5.8%
Aug7.7%
Sep+14.9%
Oct+8.9%
Nov+2.0%
Dec+5.8%
2009
Jan18.9%
Feb6.6%
Mar+3.0%
Apr+14.9%
May+10.0%
Jun+17.4%
Jul+4.8%
Aug2.5%
Sep+6.8%
Oct11.2%
Nov+0.2%
Dec+0.6%
2008
Jan13.7%
Feb9.7%
Mar1.3%
Apr5.7%
May+3.7%
Jun2.2%
Jul2.1%
Aug+2.5%
Sep6.0%
Oct20.4%
Nov12.6%
Dec+1.6%
2007
Jan+4.6%
Feb2.9%
Mar0.3%
Apr+1.3%
May+1.1%
Jun5.7%
Jul6.1%
Aug6.9%
Sep+7.6%
Oct+15.9%
Nov1.9%
Dec+3.7%
2006
Jan+11.5%
Feb+1.2%
Mar3.0%
Apr+5.9%
May+5.8%
Jun+7.9%
Jul+0.0%
Aug+4.4%
Sep+10.1%
Oct+0.1%
Nov+3.4%
Dec+2.6%
2005
Jan10.8%
Feb1.1%
Mar2.2%
Apr9.2%
May+5.9%
Jun+7.8%
Jul+3.5%
Aug6.5%
Sep+3.9%
Oct+3.2%
Nov+5.3%
Dec9.2%
2004
Jan+11.5%
Feb+5.4%
Mar7.6%
Apr10.5%
May0.1%
Jun1.2%
Jul+5.6%
Aug+6.6%
Sep+3.0%
Oct+6.9%
Nov+8.7%
Dec+7.3%
2003
Jan6.1%
Feb1.1%
Mar+3.9%
Apr+0.5%
May+10.3%
Jun+10.4%
Jul+9.3%
Aug0.3%
Sep6.6%
Oct10.6%
Nov3.1%
Dec+8.1%
2002
Jan10.4%
Feb1.7%
Mar+7.9%
Apr21.3%
May1.9%
Jun14.6%
Jul6.6%
Aug+10.2%
Sep17.6%
Oct+11.7%
Nov+19.4%
Dec14.5%
2001
Jan26.2%
Feb+3.4%
Mar27.0%
Apr+28.6%
May+1.6%
Jun+16.4%
Jul+1.1%
Aug14.4%
Sep22.0%
Oct3.9%
Nov+31.7%
Dec+11.4%
2000
Jan12.2%
Feb14.4%
Mar+27.1%
Apr+5.2%
May+17.4%
Jun14.7%
Jul+37.7%
Aug+15.9%
Sep+11.4%
Oct+28.3%
Nov1.9%
Dec+25.8%
1999
Jan+15.8%
Feb13.9%
Mar6.6%
Apr+2.9%
May+7.2%
Jun13.4%
Jul+9.7%
Aug5.0%
Sep2.9%
Oct+9.1%
Nov+4.2%
Dec+17.3%
1998
Jan+14.5%
Feb+23.1%
Mar+15.6%
Apr+8.2%
May9.7%
Jun6.8%
Jul+20.6%
Aug16.8%
Sep+11.5%
Oct+19.5%
Nov+11.3%
Dec+7.6%
1997
Jan9.9%
Feb+10.2%
Mar5.0%
Apr+0.0%
May+6.7%
Jun+7.7%
Jul+20.8%
Aug+0.0%
Sep+13.4%
Oct+28.9%
Nov2.6%
Dec+1.5%
1996
Jan+2.9%
Feb+1.4%
Mar1.4%
Apr+5.6%
May7.9%
Jun2.9%
Jul5.2%
Aug+6.3%
Sep+9.6%
Oct12.8%
Nov+10.0%
Dec0.7%
1995
Jan+1.8%
Feb+8.0%
Mar+0.0%
Apr1.7%
May+2.5%
Jun+17.2%
Jul3.5%
Aug+2.2%
Sep7.1%
Oct+3.1%
Nov+1.5%
Dec+1.5%
1994
Jan6.7%
Feb+0.7%
Mar2.8%
Apr0.7%
May26.5%
Jun+10.0%
Jul4.5%
Aug+22.9%
Sep+0.8%
Oct2.3%
Nov9.4%
Dec4.3%
1993
Jan9.8%
Feb0.8%
Mar+1.7%
Apr0.8%
May+12.6%
Jun5.0%
Jul+11.8%
Aug+6.0%
Sep+10.7%
Oct+19.3%
Nov+3.7%
Dec+6.4%
1992
Jan+16.7%
Feb+5.6%
Mar9.0%
Apr7.4%
May+3.6%
Jun17.7%
Jul+1.6%
Aug1.1%
Sep+9.6%
Oct+8.6%
Nov+7.9%
Dec+7.5%
1991
Jan12.5%
Feb+20.8%
Mar+6.3%
Apr2.9%
May+6.0%
Jun+2.9%
Jul4.6%
Aug+2.9%
Sep+7.5%
Oct15.8%
Nov+0.0%
Dec+11.7%
1990
Jan14.1%
Feb+4.9%
Mar+14.1%
Apr+6.8%
May+1.3%
Jun+5.2%
Jul+0.0%
Aug10.8%
Sep17.6%
Oct+4.9%
Nov+12.5%
Dec+30.0%
1989
Jan4.3%
Feb3.0%
Mar+4.6%
Apr5.1%
May+3.1%
Jun+2.6%
Jul+9.6%
Aug+0.7%
Sep+4.7%
Oct6.4%
Nov0.7%
Dec2.5%
1988
Jan8.8%
Feb+0.0%
Mar+6.5%
Apr+6.1%
May2.9%
Jun+23.8%
Jul10.7%
Aug+1.3%
Sep1.3%
Oct8.0%
Nov+0.0%
Dec+1.7%
1987
Jan+31.1%
Feb1.0%
Mar+8.3%
Apr+7.7%
May+20.5%
Jun0.7%
Jul3.0%
Aug+4.6%
Sep4.4%
Oct12.3%
Nov12.3%
Dec+36.0%
1986
Jan+1.1%
Feb+15.3%
Mar12.3%
Apr+2.1%
May10.7%
Jun18.9%
Jul12.7%
Aug+24.2%
Sep14.3%
Oct+15.1%
Nov+0.0%
Dec2.6%
1985
Jan+13.2%
Feb+10.1%
Mar+2.8%
Apr2.7%
May2.8%
Jun+5.8%
Jul+1.4%
Aug1.3%
Sep+0.7%
Oct+6.1%
Nov+15.4%
Dec+4.4%
1984
Jan13.7%
Feb11.4%
Mar14.1%
Apr20.9%
May+1.9%
Jun+11.1%
Jul6.7%
Aug+3.6%
Sep24.1%
Oct+20.5%
Nov+3.8%
Dec+3.6%
1983
Jan+22.4%
Feb0.5%
Mar+0.0%
Apr+34.7%
May3.9%
Jun3.3%
Jul22.7%
Aug+7.6%
Sep+29.3%
Oct17.2%
Nov+0.0%
Dec3.8%
1982
Jan1.0%
Feb+3.1%
Mar7.0%
Apr+16.1%
May9.3%
Jun5.1%
Jul7.5%
Aug+9.3%
Sep+14.9%
Oct+33.3%
Nov+19.4%
Dec9.3%
1981
Jan—
Feb—
Mar+1.4%
Apr+29.7%
May+13.5%
Jun21.1%
Jul+8.1%
Aug2.2%
Sep13.2%
Oct+22.8%
Nov+6.2%
Dec4.9%
Avg
Jan0.6%
Feb+1.1%
Mar+1.1%
Apr+1.7%
May+1.8%
Jun+0.6%
Jul+1.6%
Aug+1.1%
Sep0.1%
Oct+3.8%
Nov+4.3%
Dec+3.9%
Median
Jan0.5%
Feb0.1%
Mar+0.8%
Apr+0.7%
May+2.7%
Jun0.7%
Jul+1.1%
Aug+0.7%
Sep1.1%
Oct+5.3%
Nov+3.7%
Dec+2.6%
Win %
Jan47%
Feb47%
Mar54%
Apr54%
May67%
Jun49%
Jul51%
Aug56%
Sep49%
Oct64%
Nov71%
Dec73%
Frequently asked questions
What is the best performing month for SEI Investments (SEIC) stock?
- Historically, November is the best performing month for SEI Investments (SEIC) stock with an average return of +4.35%.
What is the worst performing month for SEI Investments (SEIC) stock?
- Historically, January is the worst performing month for SEI Investments (SEIC) stock with an average return of 0.59%.
What is the best performing quarter for SEI Investments (SEIC) stock?
- Historically, Q4 is the best performing quarter for SEI Investments (SEIC) stock with an average return of +12.61%.
What is the worst performing quarter for SEI Investments (SEIC) stock?
- Historically, Q1 is the worst performing quarter for SEI Investments (SEIC) stock with an average return of +1.72%.
What is the best performing year for SEI Investments (SEIC) stock?
- Historically, 2000 is the best performing year for SEI Investments (SEIC) stock with a return of +183.40%.
What is the worst performing year for SEI Investments (SEIC) stock?
- Historically, 2008 is the worst performing year for SEI Investments (SEIC) stock with a return of 50.92%.
Which month has the highest win rate for SEI Investments (SEIC) stock?
- Historically, December has the highest win rate for SEI Investments (SEIC) stock — positive in 73% of years.
Which month has the lowest win rate for SEI Investments (SEIC) stock?
- Historically, January has the lowest win rate for SEI Investments (SEIC) stock — positive in 47% of years.
Which quarter has the highest win rate for SEI Investments (SEIC) stock?
- Historically, Q4 has the highest win rate for SEI Investments (SEIC) stock — positive in 73% of years.
Which quarter has the lowest win rate for SEI Investments (SEIC) stock?
- Historically, Q1 has the lowest win rate for SEI Investments (SEIC) stock — positive in 52% of years.
Data & methodology
How are returns calculated?
- We compare the closing price at the end of each period (month or quarter) with the closing price at the end of the previous period. The return is the percentage change. All prices are adjusted for dividends and stock splits. Based on historical prices from our data provider.
What is average vs median?
- Average is the arithmetic mean of returns for each period across years. Median is the middle value. Both exclude empty cells. Use median to reduce impact of outliers.
What does the heatmap show?
- Green cells indicate positive returns, red cells indicate negative returns. The darker the color, the stronger the move. Average and Median rows summarize each column across years.
What is Win %?
- Percentage of years when the period had a positive return. For example, 80% for January means January was positive in 80% of the years in the selected range.
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