What is the current 10-day volatility of ICLR?

As of today, ICLR 10-day volatility is 52.66%

What 10-day volatility category does ICLR fall into?

Based on its current 10-day historical volatility, ICLR falls into the high volatility category

What is ICLR 10-day volatility 1-year high?

ICLR 10-day volatility reached a 1-year high of 240.26% on February 19, 2026

What is ICLR 10-day volatility 1-year low?

ICLR 10-day volatility reached a 1-year low of 20.31% on July 14, 2026

What is the current 1-month volatility of ICLR?

As of today, ICLR 1-month volatility is 45.15%

What 1-month volatility category does ICLR fall into?

Based on its current 1-month historical volatility, ICLR falls into the high volatility category

What is ICLR 1-month volatility 1-year high?

ICLR 1-month volatility reached a 1-year high of 176.99% on March 2, 2026

What is ICLR 1-month volatility 1-year low?

ICLR 1-month volatility reached a 1-year low of 24.23% on July 24, 2026

What is the current 3-month volatility of ICLR?

As of today, ICLR 3-month volatility is 39.76%

What 3-month volatility category does ICLR fall into?

Based on its current 3-month historical volatility, ICLR falls into the moderate volatility category

What is ICLR 3-month volatility 1-year high?

ICLR 3-month volatility reached a 1-year high of 108.02% on May 1, 2026

What is ICLR 3-month volatility 1-year low?

ICLR 3-month volatility reached a 1-year low of 37.63% on December 31, 2025

What is the current 1-year volatility of ICLR?

As of today, ICLR 1-year volatility is 66.74%

What 1-year volatility category does ICLR fall into?

Based on its current 1-year historical volatility, ICLR falls into the extreme volatility category

What is ICLR 1-year volatility 1-year high?

ICLR 1-year volatility reached a 1-year high of 71.29% on June 26, 2026

What is ICLR 1-year volatility 1-year low?

ICLR 1-year volatility reached a 1-year low of 46.29% on November 21, 2025

ICLR Stock Volatility History & Chart Since 1998

10-Day

52.66%

October 1, 2026

Summary

Current Value: As of today, ICLR 10-day volatility is 52.66%, up +8.87% on October 1, 2026
Value Category: Based on its current 10-day historical volatility, ICLR falls into the high volatility category
1-Year High: ICLR 10-day volatility reached a 1-year high of 240.26% on February 19, 2026
1-Year Low: ICLR 10-day volatility reached a 1-year low of 20.31% on July 14, 2026

10-Day Volatility Chart

Performance

ICLR Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
10-Day Volatility	Oct 1, 26	52.66%	+8.9%	+128.5%	-14.9%	+96.4%	-22.8%	+172.1%	+64.4%
1-Month Volatility	Oct 1, 26	45.15%	+8.1%	+36.2%	-22.1%	+67.3%	-18.8%	+83.7%	+60.3%
3-Month Volatility	Oct 1, 26	39.76%	+3.6%	-13.3%	-38.2%	+5.7%	-37.2%	+54.3%	+46.0%
1-Year Volatility	Oct 1, 26	66.74%	-0.6%	-0.8%	-6.2%	+41.5%	+31.9%	+98.0%	+140.8%
14-Day RSI	Oct 1, 26	43.74	-15.4%	+7.2%	-39.9%	-18.1%	-34.6%	+22.3%	-12.4%
Beta	Oct 1, 26	1.27	-1.6%	-3.8%	-16.4%	+38.0%	+46.0%	+6.7%	+81.4%
ATR	Oct 1, 26	$6.74	+3.0%	+0.6%	-18.2%	+16.2%	-4.0%	+7.9%	-21.5%
Price	Oct 1, 26	$161.85	-4.8%	+1.3%	-6.5%	-11.2%	-16.1%	-33.4%	-38.3%
200-Day SMA	Oct 1, 26	$146.55	-0.1%	-0.6%	-1.8%	-10.4%	-13.8%	-35.4%	-32.8%
50-Day SMA	Oct 1, 26	$167.48	-0.1%	-0.2%	+25.5%	-4.4%	-3.7%	-34.1%	-33.6%
20-Day SMA	Oct 1, 26	$167.75	+0.1%	+0.2%	+8.4%	-8.3%	-3.3%	-34.2%	-37.1%

10-Day Volatility History

Date	Value	Change
Oct 2, 2026	52.66%	+96.4%
Dec 31, 2025	26.81%	+81.4%
Dec 31, 2024	14.78%	-12.5%
Dec 31, 2023	16.90%	-40.7%
Dec 31, 2022	28.49%	-21.3%
Dec 31, 2021	36.22%	+298.9%
Dec 31, 2020	9.08%	-29.3%
Dec 31, 2019	12.84%	-72.0%
Dec 31, 2018	45.78%	+184.2%
Dec 31, 2017	16.11%	-28.3%
Dec 31, 2016	22.48%	+44.5%
Dec 31, 2015	15.56%	-23.6%
Dec 31, 2014	20.37%	+10.8%
Dec 31, 2013	18.38%	+37.7%
Dec 31, 2012	13.35%	-54.7%

Date	Value	Change
Dec 31, 2011	29.47%	+66.0%
Dec 31, 2010	17.75%	-29.3%
Dec 31, 2009	25.12%	-68.5%
Dec 31, 2008	79.80%	+41.2%
Dec 31, 2007	56.52%	+371.8%
Dec 31, 2006	11.98%	-55.8%
Dec 31, 2005	27.13%	+76.1%
Dec 31, 2004	15.41%	-43.2%
Dec 31, 2003	27.11%	-0.5%
Dec 31, 2002	27.25%	-25.0%
Dec 31, 2001	36.31%	+1.2%
Dec 31, 2000	35.88%	-63.9%
Dec 31, 1999	99.42%	+73.1%
Dec 31, 1998	57.44%	-

FAQ

What is the current 10-day volatility of ICLR?: As of today, ICLR 10-day volatility is 52.66%
What 10-day volatility category does ICLR fall into?: Based on its current 10-day historical volatility, ICLR falls into the high volatility category
What is ICLR 10-day volatility 1-year high?: ICLR 10-day volatility reached a 1-year high of 240.26% on February 19, 2026
What is ICLR 10-day volatility 1-year low?: ICLR 10-day volatility reached a 1-year low of 20.31% on July 14, 2026

1-Month

45.15%

October 1, 2026

Summary

Current Value: As of today, ICLR 1-month volatility is 45.15%, up +8.09% on October 1, 2026
Value Category: Based on its current 1-month historical volatility, ICLR falls into the high volatility category
1-Year High: ICLR 1-month volatility reached a 1-year high of 176.99% on March 2, 2026
1-Year Low: ICLR 1-month volatility reached a 1-year low of 24.23% on July 24, 2026

Performance

ICLR Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Month Volatility	Oct 1, 26	45.15%	+8.1%	+36.2%	-22.1%	+67.3%	-18.8%	+83.7%	+60.3%
10-Day Volatility	Oct 1, 26	52.66%	+8.9%	+128.5%	-14.9%	+96.4%	-22.8%	+172.1%	+64.4%
3-Month Volatility	Oct 1, 26	39.76%	+3.6%	-13.3%	-38.2%	+5.7%	-37.2%	+54.3%	+46.0%
1-Year Volatility	Oct 1, 26	66.74%	-0.6%	-0.8%	-6.2%	+41.5%	+31.9%	+98.0%	+140.8%
14-Day RSI	Oct 1, 26	43.74	-15.4%	+7.2%	-39.9%	-18.1%	-34.6%	+22.3%	-12.4%
Beta	Oct 1, 26	1.27	-1.6%	-3.8%	-16.4%	+38.0%	+46.0%	+6.7%	+81.4%
ATR	Oct 1, 26	$6.74	+3.0%	+0.6%	-18.2%	+16.2%	-4.0%	+7.9%	-21.5%
Price	Oct 1, 26	$161.85	-4.8%	+1.3%	-6.5%	-11.2%	-16.1%	-33.4%	-38.3%
200-Day SMA	Oct 1, 26	$146.55	-0.1%	-0.6%	-1.8%	-10.4%	-13.8%	-35.4%	-32.8%
50-Day SMA	Oct 1, 26	$167.48	-0.1%	-0.2%	+25.5%	-4.4%	-3.7%	-34.1%	-33.6%
20-Day SMA	Oct 1, 26	$167.75	+0.1%	+0.2%	+8.4%	-8.3%	-3.3%	-34.2%	-37.1%

1-Month Volatility History

Date	Value	Change
Oct 2, 2026	45.15%	+60.4%
Dec 31, 2025	28.15%	+20.7%
Dec 31, 2024	23.32%	+61.8%
Dec 31, 2023	14.41%	-51.3%
Dec 31, 2022	29.58%	-15.8%
Dec 31, 2021	35.14%	+82.4%
Dec 31, 2020	19.27%	+9.6%
Dec 31, 2019	17.59%	-50.1%
Dec 31, 2018	35.23%	+79.4%
Dec 31, 2017	19.64%	+0.5%
Dec 31, 2016	19.55%	+14.3%
Dec 31, 2015	17.11%	-46.0%
Dec 31, 2014	31.67%	+26.4%
Dec 31, 2013	25.06%	+62.1%
Dec 31, 2012	15.46%	-35.6%

Date	Value	Change
Dec 31, 2011	23.99%	-25.0%
Dec 31, 2010	31.97%	+38.6%
Dec 31, 2009	23.06%	-72.3%
Dec 31, 2008	83.22%	+94.9%
Dec 31, 2007	42.69%	+110.7%
Dec 31, 2006	20.26%	-30.2%
Dec 31, 2005	29.02%	+65.0%
Dec 31, 2004	17.59%	-32.0%
Dec 31, 2003	25.86%	-40.9%
Dec 31, 2002	43.74%	+12.6%
Dec 31, 2001	38.85%	+32.5%
Dec 31, 2000	29.33%	-72.4%
Dec 31, 1999	106.35%	+130.6%
Dec 31, 1998	46.11%	-

FAQ

What is the current 1-month volatility of ICLR?: As of today, ICLR 1-month volatility is 45.15%
What 1-month volatility category does ICLR fall into?: Based on its current 1-month historical volatility, ICLR falls into the high volatility category
What is ICLR 1-month volatility 1-year high?: ICLR 1-month volatility reached a 1-year high of 176.99% on March 2, 2026
What is ICLR 1-month volatility 1-year low?: ICLR 1-month volatility reached a 1-year low of 24.23% on July 24, 2026

3-Month

39.76%

October 1, 2026

Summary

Current Value: As of today, ICLR 3-month volatility is 39.76%, up +3.62% on October 1, 2026
Value Category: Based on its current 3-month historical volatility, ICLR falls into the moderate volatility category
1-Year High: ICLR 3-month volatility reached a 1-year high of 108.02% on May 1, 2026
1-Year Low: ICLR 3-month volatility reached a 1-year low of 37.63% on December 31, 2025

Performance

ICLR Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
3-Month Volatility	Oct 1, 26	39.76%	+3.6%	-13.3%	-38.2%	+5.7%	-37.2%	+54.3%	+46.0%
10-Day Volatility	Oct 1, 26	52.66%	+8.9%	+128.5%	-14.9%	+96.4%	-22.8%	+172.1%	+64.4%
1-Month Volatility	Oct 1, 26	45.15%	+8.1%	+36.2%	-22.1%	+67.3%	-18.8%	+83.7%	+60.3%
1-Year Volatility	Oct 1, 26	66.74%	-0.6%	-0.8%	-6.2%	+41.5%	+31.9%	+98.0%	+140.8%
14-Day RSI	Oct 1, 26	43.74	-15.4%	+7.2%	-39.9%	-18.1%	-34.6%	+22.3%	-12.4%
Beta	Oct 1, 26	1.27	-1.6%	-3.8%	-16.4%	+38.0%	+46.0%	+6.7%	+81.4%
ATR	Oct 1, 26	$6.74	+3.0%	+0.6%	-18.2%	+16.2%	-4.0%	+7.9%	-21.5%
Price	Oct 1, 26	$161.85	-4.8%	+1.3%	-6.5%	-11.2%	-16.1%	-33.4%	-38.3%
200-Day SMA	Oct 1, 26	$146.55	-0.1%	-0.6%	-1.8%	-10.4%	-13.8%	-35.4%	-32.8%
50-Day SMA	Oct 1, 26	$167.48	-0.1%	-0.2%	+25.5%	-4.4%	-3.7%	-34.1%	-33.6%
20-Day SMA	Oct 1, 26	$167.75	+0.1%	+0.2%	+8.4%	-8.3%	-3.3%	-34.2%	-37.1%

3-Month Volatility History

Date	Value	Change
Oct 2, 2026	39.76%	-5.8%
Dec 31, 2025	42.23%	-19.3%
Dec 31, 2024	52.33%	+71.3%
Dec 31, 2023	30.54%	-33.3%
Dec 31, 2022	45.77%	+55.9%
Dec 31, 2021	29.36%	+12.4%
Dec 31, 2020	26.12%	+17.3%
Dec 31, 2019	22.27%	-38.9%
Dec 31, 2018	36.44%	+36.9%
Dec 31, 2017	26.61%	-5.1%
Dec 31, 2016	28.05%	-18.8%
Dec 31, 2015	34.55%	+30.7%
Dec 31, 2014	26.44%	-16.8%
Dec 31, 2013	31.76%	+18.0%
Dec 31, 2012	26.92%	-25.1%

Date	Value	Change
Dec 31, 2011	35.92%	+22.2%
Dec 31, 2010	29.40%	-5.2%
Dec 31, 2009	31.00%	-68.6%
Dec 31, 2008	98.60%	+162.6%
Dec 31, 2007	37.55%	+45.9%
Dec 31, 2006	25.74%	-14.9%
Dec 31, 2005	30.26%	+5.3%
Dec 31, 2004	28.73%	-7.4%
Dec 31, 2003	31.01%	-47.1%
Dec 31, 2002	58.64%	-4.3%
Dec 31, 2001	61.30%	+10.2%
Dec 31, 2000	55.61%	-34.1%
Dec 31, 1999	84.36%	+43.5%
Dec 31, 1998	58.79%	-

FAQ

What is the current 3-month volatility of ICLR?: As of today, ICLR 3-month volatility is 39.76%
What 3-month volatility category does ICLR fall into?: Based on its current 3-month historical volatility, ICLR falls into the moderate volatility category
What is ICLR 3-month volatility 1-year high?: ICLR 3-month volatility reached a 1-year high of 108.02% on May 1, 2026
What is ICLR 3-month volatility 1-year low?: ICLR 3-month volatility reached a 1-year low of 37.63% on December 31, 2025

1-Year

66.74%

October 1, 2026

Summary

Current Value: As of today, ICLR 1-year volatility is 66.74%, down -0.63% on October 1, 2026
Value Category: Based on its current 1-year historical volatility, ICLR falls into the extreme volatility category
1-Year High: ICLR 1-year volatility reached a 1-year high of 71.29% on June 26, 2026
1-Year Low: ICLR 1-year volatility reached a 1-year low of 46.29% on November 21, 2025

Performance

ICLR Performance
Metric	Date	Value	1D	1M	3M	YTD	1Y	3Y	5Y
1-Year Volatility	Oct 1, 26	66.74%	-0.6%	-0.8%	-6.2%	+41.5%	+31.9%	+98.0%	+140.8%
10-Day Volatility	Oct 1, 26	52.66%	+8.9%	+128.5%	-14.9%	+96.4%	-22.8%	+172.1%	+64.4%
1-Month Volatility	Oct 1, 26	45.15%	+8.1%	+36.2%	-22.1%	+67.3%	-18.8%	+83.7%	+60.3%
3-Month Volatility	Oct 1, 26	39.76%	+3.6%	-13.3%	-38.2%	+5.7%	-37.2%	+54.3%	+46.0%
1-Year Volatility	Oct 1, 26	66.74%	-0.6%	-0.8%	-6.2%	+41.5%	+31.9%	+98.0%	+140.8%
14-Day RSI	Oct 1, 26	43.74	-15.4%	+7.2%	-39.9%	-18.1%	-34.6%	+22.3%	-12.4%
Beta	Oct 1, 26	1.27	-1.6%	-3.8%	-16.4%	+38.0%	+46.0%	+6.7%	+81.4%
ATR	Oct 1, 26	$6.74	+3.0%	+0.6%	-18.2%	+16.2%	-4.0%	+7.9%	-21.5%
Price	Oct 1, 26	$161.85	-4.8%	+1.3%	-6.5%	-11.2%	-16.1%	-33.4%	-38.3%
200-Day SMA	Oct 1, 26	$146.55	-0.1%	-0.6%	-1.8%	-10.4%	-13.8%	-35.4%	-32.8%
50-Day SMA	Oct 1, 26	$167.48	-0.1%	-0.2%	+25.5%	-4.4%	-3.7%	-34.1%	-33.6%
20-Day SMA	Oct 1, 26	$167.75	+0.1%	+0.2%	+8.4%	-8.3%	-3.3%	-34.2%	-37.1%

1-Year Volatility History

Date	Value	Change
Oct 2, 2026	66.74%	+41.5%
Dec 31, 2025	47.16%	+27.0%
Dec 31, 2024	37.13%	+27.4%
Dec 31, 2023	29.15%	-31.4%
Dec 31, 2022	42.48%	+48.5%
Dec 31, 2021	28.60%	-28.2%
Dec 31, 2020	39.83%	+73.2%
Dec 31, 2019	23.00%	-14.8%
Dec 31, 2018	27.00%	+13.2%
Dec 31, 2017	23.86%	-14.8%
Dec 31, 2016	28.00%	-19.3%
Dec 31, 2015	34.69%	+11.9%
Dec 31, 2014	31.01%	+24.0%
Dec 31, 2013	25.01%	-0.8%
Dec 31, 2012	25.22%	-24.8%

Date	Value	Change
Dec 31, 2011	33.55%	-6.1%
Dec 31, 2010	35.74%	-25.1%
Dec 31, 2009	47.71%	-20.0%
Dec 31, 2008	59.64%	+99.9%
Dec 31, 2007	29.83%	+14.3%
Dec 31, 2006	26.09%	-15.3%
Dec 31, 2005	30.82%	-18.8%
Dec 31, 2004	37.96%	-12.7%
Dec 31, 2003	43.50%	-20.8%
Dec 31, 2002	54.93%	-10.0%
Dec 31, 2001	61.01%	+10.2%
Dec 31, 2000	55.35%	-39.2%
Dec 31, 1999	91.06%	+63.6%
Dec 31, 1998	55.67%	-

FAQ

What is the current 1-year volatility of ICLR?: As of today, ICLR 1-year volatility is 66.74%
What 1-year volatility category does ICLR fall into?: Based on its current 1-year historical volatility, ICLR falls into the extreme volatility category
What is ICLR 1-year volatility 1-year high?: ICLR 1-year volatility reached a 1-year high of 71.29% on June 26, 2026
What is ICLR 1-year volatility 1-year low?: ICLR 1-year volatility reached a 1-year low of 46.29% on November 21, 2025

Data Sources & References

ICLR Official Website www.iconplc.com
ICLR Profile on Yahoo Finance finance.yahoo.com/quote/ICLR
ICLR Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/iclr