Mario Gabelli's ATI Position Overview
Mario Gabelli (via Gamco Investors, Inc. Et Al) currently holds 383,100 shares of ATI Inc. (ATI) worth $43.96 M, representing 0.42% of the portfolio. First purchased in 2016-Q3, this long-term strategic position has been held for 38 quarters.
Based on 13F filings, Mario Gabelli has maintained a strategic position in ATI, demonstrating sustained confidence in this investment. Largest addition occurred in Q4 2016, adding 470,400 shares. Largest reduction occurred in Q3 2017, reducing 98,300 shares.
Analysis based on 13F filings available since 2013 Q2
Mario Gabelli's ATI (ATI) Holding Value Over Time
Track share changes against reported price movement
Quarterly ATI (ATI) Trades by Mario Gabelli
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -12,700 | Reduce 3.21% | 383,100 | $114.76 |
| Q3 2025 | -5,000 | Reduce 1.25% | 395,800 | $81.34 |
| Q2 2025 | -900 | Reduce 0.22% | 400,800 | $86.34 |
| Q1 2025 | -4,000 | Reduce 0.99% | 401,700 | $52.03 |
| Q4 2024 | -3,342 | Reduce 0.82% | 405,700 | $55.04 |
| Q3 2024 | -7,200 | Reduce 1.73% | 409,042 | $66.91 |
| Q2 2024 | -15,200 | Reduce 3.52% | 416,242 | $55.45 |
| Q1 2024 | -1,700 | Reduce 0.39% | 431,442 | $51.17 |
| Q3 2023 | -8,500 | Reduce 1.92% | 433,142 | $41.15 |
| Q2 2023 | +200 | Add 0.05% | 441,642 | $44.23 |
| Q1 2023 | -82,416 | Reduce 15.73% | 441,442 | $39.46 |
| Q4 2022 | -342 | Reduce 0.07% | 523,858 | $29.86 |
| Q3 2022 | -10,000 | Reduce 1.87% | 524,200 | $26.61 |
| Q2 2022 | -300 | Reduce 0.06% | 534,200 | $22.71 |
| Q1 2022 | -21,000 | Reduce 3.78% | 534,500 | $26.84 |
| Q4 2021 | +9,000 | Add 1.65% | 555,500 | $15.93 |
| Q2 2021 | -15,000 | Reduce 2.67% | 546,500 | $20.85 |
| Q1 2021 | -63,000 | Reduce 10.09% | 561,500 | $21.06 |
| Q4 2020 | -32,300 | Reduce 4.92% | 624,500 | $16.77 |
| Q3 2020 | -20,900 | Reduce 3.08% | 656,800 | $8.72 |
| Q2 2020 | -36,500 | Reduce 5.11% | 677,700 | $10.19 |
| Q1 2020 | +2,600 | Add 0.37% | 714,200 | $8.50 |
| Q4 2019 | -42,300 | Reduce 5.61% | 711,600 | $20.66 |
| Q3 2019 | -22,000 | Reduce 2.84% | 753,900 | $20.25 |
| Q2 2019 | -2,500 | Reduce 0.32% | 775,900 | $25.20 |
| Q1 2019 | -14,700 | Reduce 1.85% | 778,400 | $25.57 |
| Q4 2018 | -4,500 | Reduce 0.56% | 793,100 | $21.77 |
| Q3 2018 | -16,500 | Reduce 2.03% | 797,600 | $29.55 |
| Q2 2018 | -34,300 | Reduce 4.04% | 814,100 | $25.12 |
| Q1 2018 | -75,500 | Reduce 8.17% | 848,400 | $23.68 |
| Q4 2017 | -23,300 | Reduce 2.46% | 923,900 | $24.14 |
| Q3 2017 | -98,300 | Reduce 9.40% | 947,200 | $23.90 |
| Q2 2017 | +218,483 | Add 26.42% | 1.05 M | $17.01 |
| Q1 2017 | +336,217 | Add 68.50% | 827,017 | $17.96 |
| Q4 2016 | +470,400 | Add 2305.88% | 490,800 | $15.93 |
| Q3 2016 | +20,400 | New Buy | 20,400 | $18.09 |
Mario Gabelli's ATI Investment FAQs
Mario Gabelli first purchased ATI Inc. (ATI) in Q3 2016, acquiring 20,400 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mario Gabelli has held ATI Inc. (ATI) for 38 quarters since Q3 2016.
Mario Gabelli's largest addition to ATI Inc. (ATI) was in Q4 2016, adding 490,800 shares worth $7.82 M.
According to the latest 13F filing for Q4 2025, Mario Gabelli's firm, Gamco Investors, Inc. Et Al, owns 383,100 shares of ATI Inc. (ATI), valued at approximately $43.96 M.
As of the Q4 2025 filing, ATI Inc. (ATI) represents approximately 0.42% of Mario Gabelli's publicly disclosed stock portfolio, making it one of their key holdings.
Mario Gabelli's peak holding in ATI Inc. (ATI) was 1,045,500 shares, as reported at the end of Q2 2017.