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Stock Seasonality for Arthur J. Gallagher & (AJG)

Arthur J. Gallagher & (AJG) historical monthly and quarterly returns. Dividend-adjusted performance data.

Arthur J. Gallagher & (AJG) seasonality heatmap

Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.

2026

Jan-3.6%
Feb-8.5%
Mar-4.8%
Apr-4.7%
May-2.6%
Jun+8.7%
Jul
Aug
Sep
Oct
Nov
Dec

2025

Jan+6.3%
Feb+11.9%
Mar+2.4%
Apr-7.1%
May+8.3%
Jun-7.7%
Jul-10.3%
Aug+5.4%
Sep+2.5%
Oct-19.4%
Nov-0.7%
Dec+4.8%

2024

Jan+3.2%
Feb+5.3%
Mar+2.5%
Apr-6.1%
May+7.9%
Jun+2.6%
Jul+9.3%
Aug+3.2%
Sep-3.6%
Oct-0.1%
Nov+11.0%
Dec-8.9%

2023

Jan+3.8%
Feb-4.3%
Mar+2.4%
Apr+8.8%
May-3.7%
Jun+9.9%
Jul-2.2%
Aug+7.6%
Sep-1.1%
Oct+3.3%
Nov+6.0%
Dec-9.7%

2022

Jan-6.9%
Feb+0.2%
Mar+10.7%
Apr-3.5%
May-3.9%
Jun+1.0%
Jul+9.8%
Aug+1.4%
Sep-5.4%
Oct+9.3%
Nov+6.4%
Dec-5.1%

2021

Jan-6.7%
Feb+3.8%
Mar+4.6%
Apr+16.2%
May+1.1%
Jun-4.1%
Jul-0.5%
Aug+3.1%
Sep+3.8%
Oct+12.8%
Nov-2.8%
Dec+4.5%

2020

Jan+7.7%
Feb-5.0%
Mar-16.0%
Apr-3.7%
May+20.1%
Jun+3.9%
Jul+10.3%
Aug-2.0%
Sep+0.7%
Oct-1.8%
Nov+11.3%
Dec+7.6%

2019

Jan+1.4%
Feb+8.0%
Mar-2.7%
Apr+7.1%
May+0.7%
Jun+4.5%
Jul+3.2%
Aug+0.3%
Sep-0.8%
Oct+1.8%
Nov+2.3%
Dec+2.6%

2018

Jan+8.0%
Feb+1.2%
Mar+0.0%
Apr+1.8%
May-4.7%
Jun-1.5%
Jul+9.3%
Aug+1.1%
Sep+3.8%
Oct-0.6%
Nov+4.1%
Dec-3.9%

2017

Jan+3.6%
Feb+5.8%
Mar-0.0%
Apr-1.3%
May+2.3%
Jun+0.9%
Jul+2.7%
Aug-0.9%
Sep+6.3%
Oct+2.9%
Nov+4.6%
Dec-3.9%

2016

Jan-8.1%
Feb+5.9%
Mar+12.7%
Apr+3.5%
May+5.0%
Jun-0.7%
Jul+3.3%
Aug+1.2%
Sep+2.9%
Oct-5.2%
Nov+5.2%
Dec+3.2%

2015

Jan-5.6%
Feb+5.8%
Mar+0.3%
Apr+2.3%
May+1.3%
Jun-1.6%
Jul+0.3%
Aug-7.8%
Sep-4.8%
Oct+5.9%
Nov+0.1%
Dec-5.6%

2014

Jan-1.5%
Feb+0.7%
Mar+3.0%
Apr-5.4%
May+1.8%
Jun+2.5%
Jul-3.4%
Aug+5.0%
Sep-3.2%
Oct+5.1%
Nov+0.5%
Dec-1.1%

2013

Jan+6.7%
Feb+5.1%
Mar+7.4%
Apr+2.8%
May+3.7%
Jun+0.0%
Jul+1.6%
Aug-6.1%
Sep+5.6%
Oct+8.7%
Nov-1.9%
Dec+1.6%

2012

Jan-0.3%
Feb+2.3%
Mar+5.8%
Apr+5.1%
May-7.5%
Jun+1.9%
Jul+1.2%
Aug+0.7%
Sep+1.2%
Oct-1.1%
Nov+4.0%
Dec-5.1%

2011

Jan+2.1%
Feb+5.8%
Mar-2.1%
Apr-2.1%
May-3.6%
Jun+0.6%
Jul-1.5%
Aug+0.3%
Sep-5.6%
Oct+17.5%
Nov+0.3%
Dec+9.0%

2010

Jan+0.1%
Feb+5.2%
Mar+4.9%
Apr+7.0%
May-6.0%
Jun+0.0%
Jul+4.2%
Aug-2.2%
Sep+7.5%
Oct+6.8%
Nov-0.3%
Dec+4.7%

2009

Jan-9.0%
Feb-32.7%
Mar+9.1%
Apr+32.2%
May-6.8%
Jun+3.4%
Jul+7.3%
Aug+3.8%
Sep+3.8%
Oct-8.5%
Nov+0.4%
Dec+2.0%

2008

Jan+5.0%
Feb-7.0%
Mar+1.4%
Apr+4.0%
May+4.0%
Jun-4.4%
Jul+5.5%
Aug+4.1%
Sep-2.0%
Oct-5.1%
Nov+1.8%
Dec+5.8%

2007

Jan-3.0%
Feb-0.1%
Mar+0.1%
Apr-1.3%
May+5.1%
Jun-4.1%
Jul-1.1%
Aug+7.1%
Sep-0.8%
Oct-8.2%
Nov-1.2%
Dec-6.9%

2006

Jan-5.6%
Feb+1.1%
Mar-4.7%
Apr-1.3%
May-3.2%
Jun-3.5%
Jul+7.3%
Aug-1.4%
Sep+0.6%
Oct+4.4%
Nov+5.2%
Dec+1.9%

2005

Jan-8.8%
Feb+0.7%
Mar-2.6%
Apr-3.3%
May-0.8%
Jun-0.7%
Jul+2.8%
Aug+2.4%
Sep+1.8%
Oct+2.1%
Nov+3.5%
Dec+2.4%

2004

Jan-3.7%
Feb+7.6%
Mar-2.4%
Apr-1.0%
May-1.2%
Jun-3.6%
Jul+1.7%
Aug+2.9%
Sep+4.8%
Oct-15.2%
Nov+9.1%
Dec+6.9%

2003

Jan-14.1%
Feb-3.0%
Mar+1.0%
Apr+1.8%
May+9.0%
Jun+0.5%
Jul-2.5%
Aug+1.8%
Sep+5.4%
Oct+3.2%
Nov+7.2%
Dec+4.4%

2002

Jan-4.3%
Feb+5.7%
Mar-5.6%
Apr+10.2%
May-2.4%
Jun-1.3%
Jul-15.1%
Aug-1.6%
Sep-14.3%
Oct+8.9%
Nov+5.0%
Dec+4.9%

2001

Jan-18.7%
Feb-1.3%
Mar+9.0%
Apr-9.0%
May+9.1%
Jun-5.0%
Jul+5.7%
Aug-3.5%
Sep+28.2%
Oct+7.9%
Nov-0.1%
Dec-5.1%

2000

Jan-17.0%
Feb-4.9%
Mar+28.1%
Apr+14.5%
May+3.9%
Jun+9.2%
Jul+16.8%
Aug-0.1%
Sep+21.2%
Oct+6.7%
Nov-6.5%
Dec+8.2%

1999

Jan+13.3%
Feb-4.4%
Mar-2.9%
Apr+3.2%
May+2.6%
Jun+2.5%
Jul+5.2%
Aug+4.8%
Sep-1.7%
Oct-2.7%
Nov+5.3%
Dec+19.5%

1998

Jan+7.6%
Feb+11.5%
Mar+5.7%
Apr+1.2%
May-1.6%
Jun+4.6%
Jul-12.5%
Aug-5.5%
Sep+12.3%
Oct+2.8%
Nov+9.4%
Dec-4.0%

1997

Jan-3.0%
Feb+2.2%
Mar+8.0%
Apr-4.8%
May+1.5%
Jun+19.9%
Jul-3.9%
Aug-1.5%
Sep+5.2%
Oct-5.9%
Nov+2.1%
Dec-2.8%

1996

Jan+0.0%
Feb+5.2%
Mar-6.5%
Apr-10.6%
May-1.2%
Jun+0.3%
Jul-1.5%
Aug+7.9%
Sep+2.0%
Oct-14.6%
Nov+4.9%
Dec+1.9%

1995

Jan+6.9%
Feb+2.3%
Mar+2.0%
Apr-3.4%
May+2.0%
Jun+5.1%
Jul+3.3%
Aug-2.1%
Sep-2.7%
Oct-0.6%
Nov-7.5%
Dec+14.7%

1994

Jan-14.2%
Feb-2.7%
Mar-4.8%
Apr+11.1%
May+1.3%
Jun-2.9%
Jul+2.0%
Aug+3.9%
Sep+0.6%
Oct-0.3%
Nov-4.3%
Dec+2.9%

1993

Jan-1.1%
Feb+20.0%
Mar+6.3%
Apr-5.6%
May-0.3%
Jun-0.9%
Jul-4.1%
Aug+0.0%
Sep+2.3%
Oct+15.5%
Nov-7.3%
Dec+6.0%

1992

Jan+4.3%
Feb+3.2%
Mar+0.4%
Apr-9.4%
May+6.4%
Jun-5.1%
Jul+10.7%
Aug+8.4%
Sep+7.3%
Oct-1.1%
Nov+0.0%
Dec+2.7%

1991

Jan-2.4%
Feb+12.7%
Mar+10.0%
Apr-10.7%
May-11.5%
Jun+5.5%
Jul-13.3%
Aug-0.5%
Sep-0.5%
Oct+4.4%
Nov+6.9%
Dec+2.5%

1990

Jan-10.2%
Feb+3.6%
Mar+2.0%
Apr-7.4%
May+3.7%
Jun+4.1%
Jul-0.5%
Aug-11.8%
Sep+3.4%
Oct-0.5%
Nov+16.8%
Dec-2.8%

1989

Jan+5.6%
Feb+3.3%
Mar-1.3%
Apr+9.7%
May+0.0%
Jun+2.4%
Jul+15.0%
Aug-3.0%
Sep+3.6%
Oct+2.5%
Nov+6.3%
Dec-1.4%

1988

Jan-11.2%
Feb-4.2%
Mar+1.8%
Apr+3.4%
May+11.7%
Jun+12.7%
Jul-6.0%
Aug+0.7%
Sep+2.8%
Oct-1.4%
Nov+3.4%
Dec-4.7%

1987

Jan+2.7%
Feb+3.6%
Mar-12.0%
Apr-18.8%
May+6.3%
Jun+0.7%
Jul+2.6%
Aug+0.6%
Sep+0.0%
Oct-16.5%
Nov-5.3%
Dec+7.2%

1986

Jan+9.6%
Feb+6.0%
Mar-1.6%
Apr-6.3%
May+1.1%
Jun-0.6%
Jul+6.7%
Aug+7.3%
Sep+2.4%
Oct+2.4%
Nov-3.3%
Dec-9.6%

1985

Jan+12.7%
Feb+9.1%
Mar+1.7%
Apr+13.1%
May+5.1%
Jun-4.8%
Jul-5.1%
Aug-2.3%
Sep-8.6%
Oct+20.5%
Nov+14.2%
Dec+3.1%

1984

Jan
Feb
Mar
Apr
May
Jun
Jul+12.2%
Aug+31.0%
Sep+13.9%
Oct+7.3%
Nov+4.9%
Dec+9.1%

Avg

Jan-1.2%
Feb+2.1%
Mar+1.7%
Apr+0.8%
May+1.5%
Jun+1.1%
Jul+1.8%
Aug+1.5%
Sep+2.4%
Oct+1.3%
Nov+2.9%
Dec+1.5%

Median

Jan-0.7%
Feb+3.3%
Mar+1.5%
Apr-1.1%
May+1.3%
Jun+0.5%
Jul+2.3%
Aug+0.7%
Sep+2.1%
Oct+2.2%
Nov+3.5%
Dec+2.4%

Last 5Y Avg

Jan+0.6%
Feb+0.9%
Mar+2.7%
Apr-2.5%
May+1.2%
Jun+0.3%
Jul+1.2%
Aug+4.1%
Sep-0.8%
Oct+1.2%
Nov+4.0%
Dec-2.9%

Std Dev (σ)

Jan7.9%
Feb7.9%
Mar7.1%
Apr9.0%
May5.7%
Jun5.2%
Jul7.2%
Aug6.3%
Sep7.2%
Oct8.6%
Nov5.5%
Dec6.3%

Consistency (μ/σ)

Jan-0.15
Feb0.26
Mar0.24
Apr0.09
May0.27
Jun0.22
Jul0.25
Aug0.24
Sep0.33
Oct0.15
Nov0.52
Dec0.24

Win Rate (%)

Jan45%
Feb71%
Mar64%
Apr48%
May60%
Jun54%
Jul62%
Aug60%
Sep64%
Oct55%
Nov69%
Dec62%

Winning / Losing Months

Jan1923
Feb3012
Mar2715
Apr2022
May2517
Jun2219
Jul2616
Aug2517
Sep2715
Oct2319
Nov2913
Dec2616

Longest Win / Loss Streak

Jan48
Feb103
Mar53
Apr34
May54
Jun65
Jul63
Aug53
Sep43
Oct44
Nov74
Dec63

Best

Jan+13.3%1999
Feb+20.0%1993
Mar+28.1%2000
Apr+32.2%2009
May+20.1%2020
Jun+19.9%1997
Jul+16.8%2000
Aug+31.0%1984
Sep+28.2%2001
Oct+20.5%1985
Nov+16.8%1990
Dec+19.5%1999

Worst

Jan-18.7%2001
Feb-32.7%2009
Mar-16.0%2020
Apr-18.8%1987
May-11.5%1991
Jun-7.7%2025
Jul-15.1%2002
Aug-11.8%1990
Sep-14.3%2002
Oct-19.4%2025
Nov-7.5%1995
Dec-9.7%2023
−32.7%+32.2%

Frequently asked questions

Data & methodology