ATI (ATI) Market Cap 1997–2026

As of November 13, 2026, ATI had a market cap of $24.87 billion, which decreased by 3.72% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Nov 13, 2026, 4:00 PM ET

ATI Inc. (ATI)

🌍 United States 📈 NYSE 🏭 Industrials 🏢 Aerospace & Defense

Latest Market Cap

$24.87B ▼ 3.72%

Start of 2026

$15.59B ▲ 59.53%

1 Year Ago

$13.39B ▲ 85.74%

All-Time High

$31.56B ▼ 21.20%

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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 ATI Market Cap History by Year and Month

ATI Market Cap History by Year and Month
Year / Month	Market Cap	% Change
2026	$24.87B	▲ 59.53%
November 13, 2026	$24.87B	▲ 10.58%
October 30, 2026	$22.49B	▼ 12.80%
September 30, 2026	$25.79B	▼ 7.26%
August 31, 2026	$27.81B	▲ 8.72%
July 31, 2026	$25.58B	▼ 4.91%
June 30, 2026	$26.9B	▲ 12.55%
May 29, 2026	$23.9B	▲ 12.68%
April 30, 2026	$21.21B	▲ 6.48%
March 31, 2026	$19.92B	▼ 11.07%
February 27, 2026	$22.4B	▲ 37.09%
January 30, 2026	$16.34B	▲ 4.81%
2025	$15.59B	▲ 100.33%
December 31, 2025	$15.59B	▲ 13.80%
November 28, 2025	$13.7B	▲ 1.86%
October 31, 2025	$13.45B	▲ 19.98%
September 30, 2025	$11.21B	▲ 4.86%
August 29, 2025	$10.69B	▲ 0.85%
July 31, 2025	$10.6B	▼ 12.97%
June 30, 2025	$12.18B	▲ 8.41%
May 30, 2025	$11.235B	▲ 46.45%
April 30, 2025	$7.671B	▲ 4.52%
March 31, 2025	$7.34B	▼ 11.23%
February 28, 2025	$8.269B	▲ 1.87%
January 31, 2025	$8.116B	▲ 4.30%
2024	$7.782B	▲ 34.15%
December 31, 2024	$7.782B	▼ 9.33%
November 29, 2024	$8.583B	▲ 14.15%
October 31, 2024	$7.519B	▼ 21.22%
September 30, 2024	$9.543B	▲ 20.03%
August 30, 2024	$7.951B	▼ 5.66%
July 31, 2024	$8.427B	▲ 22.13%
June 28, 2024	$6.9B	▼ 9.60%
May 31, 2024	$7.633B	▲ 2.75%
April 30, 2024	$7.429B	▲ 16.67%
March 28, 2024	$6.368B	▲ 1.33%
February 29, 2024	$6.284B	▲ 21.19%
January 31, 2024	$5.186B	▼ 10.61%
2023	$5.801B	▲ 50.11%
December 29, 2023	$5.801B	▲ 3.46%
November 30, 2023	$5.607B	▲ 16.36%
October 31, 2023	$4.819B	▼ 8.93%
September 29, 2023	$5.291B	▼ 9.22%
August 31, 2023	$5.829B	▼ 4.93%
July 31, 2023	$6.131B	▲ 7.80%
June 30, 2023	$5.687B	▲ 27.94%
May 31, 2023	$4.445B	▼ 10.46%
April 28, 2023	$4.965B	▼ 2.13%
March 31, 2023	$5.073B	▼ 2.97%
February 28, 2023	$5.228B	▲ 12.00%
January 31, 2023	$4.668B	▲ 20.79%
2022	$3.864B	▲ 90.64%
December 30, 2022	$3.864B	▼ 2.13%
November 30, 2022	$3.949B	▲ 2.52%
October 31, 2022	$3.852B	▲ 11.84%
September 30, 2022	$3.444B	▼ 11.42%
August 31, 2022	$3.888B	▲ 20.25%
July 29, 2022	$3.233B	▲ 9.60%
June 30, 2022	$2.95B	▼ 13.58%
May 31, 2022	$3.414B	▲ 1.18%
April 29, 2022	$3.374B	▲ 1.27%
March 31, 2022	$3.331B	▲ 1.55%
February 28, 2022	$3.281B	▲ 40.95%
January 31, 2022	$2.327B	▲ 14.81%
2021	$2.027B	▼ 4.69%
December 31, 2021	$2.027B	▲ 11.87%
November 30, 2021	$1.812B	▼ 11.55%
October 29, 2021	$2.049B	▼ 3.19%
September 30, 2021	$2.116B	▼ 6.89%
August 31, 2021	$2.273B	▼ 13.01%
July 30, 2021	$2.612B	▼ 1.53%
June 30, 2021	$2.653B	▼ 14.84%
May 28, 2021	$3.115B	▲ 5.29%
April 30, 2021	$2.959B	▲ 10.45%
March 31, 2021	$2.679B	▲ 7.43%
February 26, 2021	$2.493B	▲ 15.59%
January 29, 2021	$2.157B	▲ 1.43%
2020	$2.127B	▼ 18.36%
December 31, 2020	$2.127B	▲ 24.31%
November 30, 2020	$1.711B	▲ 46.47%
October 30, 2020	$1.168B	▲ 5.62%
September 30, 2020	$1.106B	▲ 4.69%
August 31, 2020	$1.056B	▼ 4.14%
July 31, 2020	$1.102B	▼ 14.72%
June 30, 2020	$1.292B	▲ 17.56%
May 29, 2020	$1.099B	▲ 15.58%
April 30, 2020	$0.951B	▼ 11.65%
March 31, 2020	$1.076B	▼ 50.05%
February 28, 2020	$2.155B	▼ 0.93%
January 31, 2020	$2.175B	▼ 16.51%
2019	$2.605B	▼ 4.79%
December 31, 2019	$2.605B	▼ 10.41%
November 29, 2019	$2.908B	▲ 9.76%
October 31, 2019	$2.649B	▲ 3.75%
September 30, 2019	$2.553B	▲ 2.18%
August 30, 2019	$2.499B	▼ 8.96%
July 31, 2019	$2.745B	▼ 13.58%
June 28, 2019	$3.176B	▲ 17.70%
May 31, 2019	$2.698B	▼ 14.09%
April 30, 2019	$3.141B	▼ 2.60%
March 29, 2019	$3.225B	▼ 10.38%
February 28, 2019	$3.598B	▲ 4.53%
January 31, 2019	$3.442B	▲ 25.82%
2018	$2.736B	▼ 9.95%
December 31, 2018	$2.736B	▼ 17.10%
November 30, 2018	$3.3B	▲ 1.43%
October 31, 2018	$3.254B	▼ 12.39%
September 28, 2018	$3.714B	▲ 9.32%
August 31, 2018	$3.397B	▼ 2.77%
July 31, 2018	$3.494B	▲ 10.70%
June 29, 2018	$3.156B	▼ 11.92%
May 31, 2018	$3.584B	▲ 7.34%
April 30, 2018	$3.339B	▲ 12.24%
March 29, 2018	$2.974B	▼ 8.64%
February 28, 2018	$3.256B	▼ 4.05%
January 31, 2018	$3.393B	▲ 11.68%
2017	$3.038B	▲ 75.09%
December 29, 2017	$3.038B	▲ 6.02%
November 30, 2017	$2.866B	▲ 4.55%
October 31, 2017	$2.741B	▲ 5.34%
September 29, 2017	$2.602B	▲ 14.74%
August 31, 2017	$2.268B	▲ 9.98%
July 31, 2017	$2.062B	▲ 11.35%
June 30, 2017	$1.852B	▲ 10.30%
May 31, 2017	$1.679B	▼ 15.91%
April 28, 2017	$1.997B	▲ 2.17%
March 31, 2017	$1.954B	▼ 6.46%
February 28, 2017	$2.089B	▼ 11.73%
January 31, 2017	$2.367B	▲ 36.41%
2016	$1.735B	▲ 41.29%
December 30, 2016	$1.735B	▼ 9.18%
November 30, 2016	$1.911B	▲ 28.59%
October 31, 2016	$1.486B	▼ 24.52%
September 30, 2016	$1.968B	▲ 5.92%
August 31, 2016	$1.858B	▼ 4.21%
July 29, 2016	$1.94B	▲ 39.69%
June 30, 2016	$1.389B	▲ 3.00%
May 31, 2016	$1.348B	▼ 24.24%
April 29, 2016	$1.78B	▲ 0.25%
March 31, 2016	$1.775B	▲ 21.56%
February 29, 2016	$1.46B	▲ 42.62%
January 29, 2016	$1.024B	▼ 16.62%
2015	$1.228B	▼ 67.51%
December 31, 2015	$1.228B	▼ 11.24%
November 30, 2015	$1.384B	▼ 13.81%
October 30, 2015	$1.605B	▲ 3.67%
September 30, 2015	$1.549B	▼ 26.57%
August 31, 2015	$2.109B	▼ 9.43%
July 31, 2015	$2.328B	▼ 29.40%
June 30, 2015	$3.298B	▼ 7.09%
May 29, 2015	$3.55B	▼ 4.38%
April 30, 2015	$3.712B	▲ 13.31%
March 31, 2015	$3.276B	▼ 10.40%
February 27, 2015	$3.656B	▲ 17.89%
January 30, 2015	$3.101B	▼ 17.95%
2014	$3.78B	▼ 1.75%
December 31, 2014	$3.78B	▲ 3.22%
November 28, 2014	$3.662B	▲ 2.56%
October 31, 2014	$3.571B	▼ 11.46%
September 30, 2014	$4.033B	▼ 12.03%
August 29, 2014	$4.585B	▲ 12.01%
July 31, 2014	$4.093B	▼ 16.52%
June 30, 2014	$4.903B	▲ 9.96%
May 30, 2014	$4.459B	▼ 0.32%
April 30, 2014	$4.473B	▲ 9.34%
March 31, 2014	$4.091B	▲ 19.25%
February 28, 2014	$3.431B	▲ 1.05%
January 31, 2014	$3.395B	▼ 11.76%
2013	$3.847B	▲ 17.99%
December 31, 2013	$3.847B	▲ 7.25%
November 29, 2013	$3.587B	▲ 0.36%
October 31, 2013	$3.574B	▲ 8.42%
September 30, 2013	$3.296B	▲ 14.33%
August 30, 2013	$2.883B	▼ 3.12%
July 31, 2013	$2.976B	▲ 4.79%
June 28, 2013	$2.84B	▼ 4.57%
May 31, 2013	$2.976B	▲ 2.19%
April 30, 2013	$2.912B	▼ 14.51%
March 28, 2013	$3.407B	▲ 4.04%
February 28, 2013	$3.275B	▼ 3.67%
January 31, 2013	$3.399B	▲ 4.25%
2012	$3.261B	▼ 35.86%
December 31, 2012	$3.261B	▲ 16.05%
November 30, 2012	$2.81B	▼ 0.65%
October 31, 2012	$2.828B	▼ 17.28%
September 28, 2012	$3.419B	▲ 7.62%
August 31, 2012	$3.177B	▼ 1.30%
July 31, 2012	$3.218B	▼ 5.78%
June 29, 2012	$3.416B	▼ 0.72%
May 31, 2012	$3.44B	▼ 25.20%
April 30, 2012	$4.599B	▲ 4.34%
March 30, 2012	$4.408B	▼ 5.83%
February 29, 2012	$4.681B	▼ 3.03%
January 31, 2012	$4.827B	▼ 5.05%
2011	$5.084B	▼ 6.50%
December 30, 2011	$5.084B	▼ 4.82%
November 30, 2011	$5.341B	▲ 8.23%
October 31, 2011	$4.935B	▲ 25.45%
September 30, 2011	$3.934B	▼ 26.19%
August 31, 2011	$5.33B	▼ 13.87%
July 29, 2011	$6.188B	▼ 8.31%
June 30, 2011	$6.749B	▲ 1.78%
May 31, 2011	$6.631B	▼ 6.94%
April 29, 2011	$7.126B	▲ 6.35%
March 31, 2011	$6.7B	▲ 1.20%
February 28, 2011	$6.621B	▲ 3.07%
January 31, 2011	$6.424B	▲ 18.14%
2010	$5.437B	▲ 23.84%
December 31, 2010	$5.437B	▲ 6.69%
November 30, 2010	$5.097B	▼ 1.88%
October 29, 2010	$5.194B	▲ 13.43%
September 30, 2010	$4.579B	▲ 14.08%
August 31, 2010	$4.014B	▼ 14.47%
July 30, 2010	$4.693B	▲ 7.74%
June 30, 2010	$4.356B	▼ 19.16%
May 28, 2010	$5.388B	▲ 2.26%
April 30, 2010	$5.269B	▼ 0.97%
March 31, 2010	$5.321B	▲ 24.10%
February 26, 2010	$4.287B	▲ 7.02%
January 29, 2010	$4.006B	▼ 8.76%
2009	$4.391B	▲ 78.60%
December 31, 2009	$4.391B	▲ 31.55%
November 30, 2009	$3.338B	▲ 10.27%
October 30, 2009	$3.027B	▼ 11.80%
September 30, 2009	$3.432B	▲ 15.22%
August 31, 2009	$2.978B	▲ 12.15%
July 31, 2009	$2.656B	▼ 22.47%
June 30, 2009	$3.426B	▼ 1.31%
May 29, 2009	$3.471B	▲ 8.19%
April 30, 2009	$3.208B	▲ 50.12%
March 31, 2009	$2.137B	▲ 11.49%
February 27, 2009	$1.917B	▼ 9.88%
January 30, 2009	$2.127B	▼ 13.47%
2008	$2.458B	▼ 71.82%
December 31, 2008	$2.458B	▲ 11.24%
November 28, 2008	$2.21B	▼ 13.53%
October 31, 2008	$2.556B	▼ 13.77%
September 30, 2008	$2.964B	▼ 39.69%
August 29, 2008	$4.914B	▲ 3.62%
July 31, 2008	$4.743B	▼ 20.54%
June 30, 2008	$5.968B	▼ 21.29%
May 30, 2008	$7.583B	▲ 8.96%
April 30, 2008	$6.959B	▼ 2.29%
March 31, 2008	$7.122B	▼ 8.79%
February 29, 2008	$7.808B	▲ 10.04%
January 31, 2008	$7.096B	▼ 18.65%
2007	$8.722B	▼ 4.50%
December 31, 2007	$8.722B	▼ 12.74%
November 30, 2007	$9.996B	▼ 4.33%
October 31, 2007	$10.448B	▼ 7.04%
September 28, 2007	$11.239B	▲ 10.62%
August 31, 2007	$10.16B	▼ 5.28%
July 31, 2007	$10.726B	▲ 0.12%
June 29, 2007	$10.713B	▼ 9.27%
May 31, 2007	$11.808B	▲ 5.48%
April 30, 2007	$11.194B	▲ 2.88%
March 30, 2007	$10.88B	▲ 4.27%
February 28, 2007	$10.435B	▼ 0.37%
January 31, 2007	$10.473B	▲ 14.67%
2006	$9.133B	▲ 158.97%
December 29, 2006	$9.133B	▲ 1.15%
November 30, 2006	$9.03B	▲ 13.87%
October 31, 2006	$7.93B	▲ 26.76%
September 29, 2006	$6.256B	▲ 8.44%
August 31, 2006	$5.769B	▼ 10.24%
July 31, 2006	$6.427B	▼ 7.79%
June 30, 2006	$6.97B	▲ 9.24%
May 31, 2006	$6.38B	▼ 8.23%
April 28, 2006	$6.953B	▲ 13.60%
March 31, 2006	$6.12B	▲ 21.94%
February 28, 2006	$5.019B	▼ 1.42%
January 31, 2006	$5.092B	▲ 44.37%
2005	$3.527B	▲ 69.92%
December 30, 2005	$3.527B	▲ 9.40%
November 30, 2005	$3.224B	▲ 14.87%
October 31, 2005	$2.806B	▼ 7.22%
September 30, 2005	$3.025B	▲ 13.26%
August 31, 2005	$2.671B	▼ 4.99%
July 29, 2005	$2.811B	▲ 32.00%
June 30, 2005	$2.13B	▲ 3.78%
May 31, 2005	$2.052B	▼ 5.09%
April 29, 2005	$2.162B	▼ 6.98%
March 31, 2005	$2.324B	▼ 1.51%
February 28, 2005	$2.36B	▲ 2.66%
January 31, 2005	$2.299B	▲ 10.75%
2004	$2.076B	▲ 94.67%
December 31, 2004	$2.076B	▼ 1.21%
November 30, 2004	$2.101B	▲ 30.87%
October 29, 2004	$1.605B	▼ 7.88%
September 30, 2004	$1.743B	▼ 2.76%
August 31, 2004	$1.792B	▼ 6.18%
July 30, 2004	$1.91B	▲ 30.05%
June 30, 2004	$1.469B	▲ 50.48%
May 28, 2004	$0.976B	▲ 17.51%
April 30, 2004	$0.831B	▼ 15.51%
March 31, 2004	$0.983B	▼ 4.02%
February 27, 2004	$1.024B	▲ 35.11%
January 30, 2004	$0.758B	▼ 28.90%
2003	$1.066B	▲ 112.25%
December 31, 2003	$1.066B	▲ 61.24%
November 28, 2003	$0.661B	▲ 7.19%
October 31, 2003	$0.617B	▲ 16.72%
September 30, 2003	$0.529B	▼ 12.62%
August 29, 2003	$0.605B	▼ 1.32%
July 31, 2003	$0.613B	▲ 14.72%
June 30, 2003	$0.534B	▲ 0.30%
May 30, 2003	$0.533B	▲ 58.55%
April 30, 2003	$0.336B	▲ 43.10%
March 31, 2003	$0.235B	▼ 2.61%
February 28, 2003	$0.241B	▼ 34.57%
January 31, 2003	$0.368B	▼ 26.65%
2002	$0.502B	▼ 62.66%
December 31, 2002	$0.502B	▼ 12.88%
November 29, 2002	$0.577B	▲ 4.38%
October 31, 2002	$0.552B	▼ 1.01%
September 30, 2002	$0.558B	▼ 20.37%
August 30, 2002	$0.701B	▼ 9.14%
July 31, 2002	$0.771B	▼ 39.42%
June 28, 2002	$1.273B	▼ 10.02%
May 31, 2002	$1.415B	▲ 4.04%
April 30, 2002	$1.36B	▲ 2.06%
March 28, 2002	$1.333B	▲ 6.30%
February 28, 2002	$1.254B	▼ 3.28%
January 31, 2002	$1.296B	▼ 3.64%
2001	$1.345B	▲ 5.43%
December 31, 2001	$1.345B	▲ 8.55%
November 30, 2001	$1.239B	▲ 4.32%
October 31, 2001	$1.188B	▲ 11.04%
September 28, 2001	$1.07B	▼ 27.95%
August 31, 2001	$1.485B	▼ 2.94%
July 31, 2001	$1.53B	▲ 5.43%
June 29, 2001	$1.451B	▼ 12.35%
May 31, 2001	$1.655B	▲ 13.26%
April 30, 2001	$1.462B	▲ 4.77%
March 30, 2001	$1.395B	▼ 1.75%
February 28, 2001	$1.42B	▲ 4.89%
January 31, 2001	$1.354B	▲ 6.10%
2000	$1.276B	▼ 37.08%
December 29, 2000	$1.276B	▼ 20.13%
November 30, 2000	$1.597B	▼ 1.85%
October 31, 2000	$1.627B	▲ 10.43%
September 29, 2000	$1.474B	▼ 16.67%
August 31, 2000	$1.768B	▲ 5.14%
July 31, 2000	$1.682B	▲ 14.42%
June 30, 2000	$1.47B	▼ 21.91%
May 31, 2000	$1.882B	▼ 6.46%
April 28, 2000	$2.012B	▲ 19.68%
March 31, 2000	$1.681B	▲ 9.85%
February 29, 2000	$1.531B	▼ 18.86%
January 31, 2000	$1.886B	▼ 6.96%
1999	$2.028B	▼ 43.29%
December 31, 1999	$2.028B	▼ 7.96%
November 30, 1999	$2.203B	▼ 17.08%
October 29, 1999	$2.657B	▼ 10.00%
September 30, 1999	$2.952B	▼ 9.70%
August 31, 1999	$3.269B	▼ 12.83%
July 30, 1999	$3.75B	▼ 5.25%
June 30, 1999	$3.958B	▲ 10.70%
May 28, 1999	$3.575B	▼ 8.66%
April 30, 1999	$3.914B	▲ 18.15%
March 31, 1999	$3.313B	▼ 8.18%
February 26, 1999	$3.608B	▲ 1.85%
January 29, 1999	$3.543B	▼ 0.92%
1998	$3.575B	▼ 21.53%
December 31, 1998	$3.575B	▼ 0.61%
November 30, 1998	$3.597B	— 0.00%
October 30, 1998	$3.597B	▲ 15.44%
September 30, 1998	$3.116B	▲ 18.26%
August 31, 1998	$2.635B	▼ 24.69%
July 31, 1998	$3.499B	▼ 12.57%
June 30, 1998	$4.002B	▼ 1.61%
May 29, 1998	$4.067B	▼ 8.37%
April 30, 1998	$4.439B	▼ 8.76%
March 31, 1998	$4.866B	▲ 1.86%
February 27, 1998	$4.777B	▲ 10.15%
January 30, 1998	$4.336B	▼ 4.83%
1997	$4.557B	N/A
December 31, 1997	$4.557B	▲ 0.49%
November 28, 1997	$4.535B	▼ 2.14%
October 31, 1997	$4.634B	▼ 8.08%
September 30, 1997	$5.041B	▼ 7.29%
August 29, 1997	$5.437B	▼ 0.80%
July 31, 1997	$5.481B	▲ 15.28%
June 30, 1997	$4.755B	▲ 4.85%
May 30, 1997	$4.535B	▼ 3.29%
April 30, 1997	$4.689B	▼ 5.33%
March 31, 1997	$4.953B	N/A

All market cap values reflect closing prices for the period shown.

📊 ATI Market Cap and Other Industry Peers

Below are selected companies for comparison based on industry, sub-industry, and sector:

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.