ATI INC Common Stock Shares Outstanding

• ATI INC showed a decrease of -3.9% in Common Stock Shares Outstanding from 2024 to 2025.
• This data is from ATI INC's annual report (Form 10-K), filed with the SEC on February 20, 2026.
• XBRL data for this metric is available from 2008 to 2025 (18 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
• Quarterly values from 10-Q filings: Q3 2009: 98.08 million shares | Q1 2010: 98.55 million shares | Q2 2010: 98.57 million shares | Q3 2010: 98.58 million shares | Q1 2011: 98.94 million shares | Q2 2011: 106.33 million shares | Q3 2011: 106.35 million shares | Q1 2012: 107.09 million shares | Q2 2012: 107.16 million shares | Q3 2012: 107.22 million shares | Q1 2013: 107.96 million shares | Q2 2013: 108.00 million shares | Q3 2013: 108.01 million shares | Q1 2014: 108.57 million shares | Q2 2014: 108.72 million shares | Q3 2014: 108.71 million shares | Q1 2015: 109.17 million shares | Q2 2015: 109.21 million shares | Q3 2015: 109.21 million shares | Q1 2016: 108.92 million shares | Q2 2016: 108.93 million shares | Q3 2016: 108.93 million shares | Q1 2017: 108.82 million shares | Q2 2017: 108.88 million shares | Q3 2017: 108.86 million shares | Q1 2018: 125.65 million shares | Q2 2018: 125.68 million shares | Q3 2018: 125.68 million shares | Q1 2019: 126.03 million shares | Q2 2019: 126.08 million shares | Q3 2019: 126.09 million shares | Q1 2020: 126.63 million shares | Q2 2020: 126.81 million shares | Q3 2020: 126.82 million shares | Q1 2021: 127.20 million shares | Q2 2021: 127.24 million shares | Q3 2021: 127.25 million shares | Q1 2022: 124.12 million shares | Q2 2022: 129.90 million shares | Q3 2022: 129.42 million shares | Q1 2023: 128.55 million shares | Q2 2023: 128.58 million shares | Q3 2023: 127.58 million shares | Q1 2024: 124.44 million shares | Q2 2024: 124.46 million shares | Q3 2024: 142.63 million shares | Q1 2025: 141.07 million shares | Q2 2025: 137.83 million shares | Q3 2025: 135.86 million shares.
• Over the full 18 years of available data (2008 to 2025), ATI INC's Common Stock Shares Outstanding has grown by 39.7%.
• Historical annual values: Fiscal year 2025: 135.93 million shares | Fiscal year 2024: 141.39 million shares | Fiscal year 2023: 126.88 million shares | Fiscal year 2022: 128.27 million shares | Fiscal year 2021: 127.25 million shares | Fiscal year 2020: 126.82 million shares | Fiscal year 2019: 126.09 million shares | Fiscal year 2018: 125.68 million shares | Fiscal year 2017: 125.86 million shares | Fiscal year 2016: 108.93 million shares | Fiscal year 2015: 109.17 million shares | Fiscal year 2014: 108.71 million shares | Fiscal year 2013: 107.98 million shares | Fiscal year 2012: 107.40 million shares | Fiscal year 2011: 106.35 million shares | Fiscal year 2010: 98.54 million shares | Fiscal year 2009: 98.07 million shares | Fiscal year 2008: 97.33 million shares.
• Data sourced from SEC EDGAR public filings as of August 6, 2026.

Last verified: August 6, 2026