ATI Inc.
MX ˙ BMV ˙ US01741R1023
SecurityMX:ATI / ATI Inc.
InstitutionComerica Bank
Latest Disclosed Ownership72,427 shares
Latest Disclosed Value $ 8,311,694
Comerica Bank reports 31.17% increase in ownership of ATI / ATI Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 72,427 shares of ATI Inc. (MX:ATI) valued at $8,311,694 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 55,217 shares of ATI Inc.. This represents a change in shares of 31.17% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F ATI COM 01741R102 72,427 17,210 31.17 8,312 85.06 0.0332
2025-11-14 2025-09-30 13F ATI COM 01741R102 55,217 -60,235 -52.17 4,491 -54.95 0.0169
2025-08-14 2025-06-30 13F ATI COM 01741R102 115,452 -31,542 -21.46 9,968 30.33 0.0387
2025-05-14 2025-03-31 13F ATI COM 01741R102 146,994 -39,755 -21.29 7,648 -25.59 0.0321
2025-02-14 2024-12-31 13F/A-1 ATI COM 01741R102 186,749 61,652 49.28 10,279 22.80 0.0415
2025-02-14 2024-12-31 13F ATI COM 01741R102 186,749 61,652 10,279 0.0344
2024-11-14 2024-09-30 13F ATI COM 01741R102 125,097 -9,120 -6.79 8,370 12.47 0.0331
2024-08-15 2024-06-30 13F ATI COMMON 01741R102 134,217 -7,026 -4.97 7,442 2.97 0.0310
2024-05-16 2024-03-31 13F ATI COMMON 01741R102 141,243 81,708 137.24 7,227 166.97 0.0311
2024-02-14 2023-12-31 13F ATI COMMON 01741R102 59,535 -34,509 -36.69 2,707 -30.03 0.0125
2023-11-21 2023-09-30 13F ATI COMMON 01741R102 94,044 94,044 3,870 0.0202
2023-08-22 2023-06-30 13F ATI COM 01741R102 0 -120,730 -100.00 0 -100.00
2023-01-26 2022-12-31 13F ATI COM 01741R102 120,730 -20,746 -14.66 4 -99.90 0.0327
2022-10-28 2022-09-30 13F ATI COM 01741R102 141,476 -30,676 -17.82 4,135 -0.10 0.0349
2022-08-02 2022-06-30 13F ATI COM 01741R102 172,152 -46,790 -21.37 4,139 -36.90 0.0340
2022-04-27 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 218,942 24,289 12.48 6,559 75.33 0.0476
2022-02-18 2021-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 194,653 -7,543 -3.73 3,741 15.86 0.0275
2021-11-22 2021-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 202,196 82,760 69.29 3,229 48.87 0.0194
2021-08-26 2021-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 119,436 -9,087 -7.07 2,169 -27.80 0.0129
2021-04-28 2021-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 128,523 -5,271 -3.94 3,004 23.93 0.0179
2021-01-28 2020-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 133,794 668 0.50 2,424 88.64 0.0154
2020-10-30 2020-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 133,126 56,019 72.65 1,285 73.65 0.0093
2020-07-31 2020-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 77,107 1,012 1.33 740 49.80 0.0057
2020-05-01 2020-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 76,095 -401 -0.52 494 -63.73 0.0045
2020-02-07 2019-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 76,496 450 0.59 1,362 -6.84 0.0103
2019-10-31 2019-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 76,046 -211 -0.28 1,462 -21.57 0.0116
2019-08-02 2019-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 76,257 -7,742 -9.22 1,864 -17.85 0.0149
2019-05-02 2019-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 83,999 742 0.89 2,269 4.66 0.0184
2019-02-06 2018-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 83,257 1,767 2.17 2,168 -0.55 0.0184
2018-11-01 2018-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 81,490 -14,254 -14.89 2,180 -14.74 0.0176
2018-08-01 2018-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 95,744 -4,510 -4.50 2,557 -3.07 0.0179
2018-05-01 2018-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 100,254 -224 -0.22 2,638 -8.66 0.0188
2018-02-02 2017-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 100,478 13,270 15.22 2,888 35.21 0.0192
2017-11-06 2017-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 87,208 -139 -0.16 2,136 42.69 0.0155
2017-08-03 2017-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 87,347 -43,314 -33.15 1,497 -38.27 0.0112
2017-05-03 2017-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 130,661 -8,764 -6.29 2,425 5.99 0.0184
2017-02-08 2016-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 139,425 59,864 75.24 2,288 58.45 0.0181
2016-11-10 2016-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 79,561 940 1.20 1,444 7.68 0.0852
2016-08-11 2016-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 78,621 2,830 3.73 1,341 4.77 0.0116
2016-05-11 2016-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 75,791 -1,515 -1.96 1,280 74.62 0.0114
2016-02-05 2015-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 77,306 -3,367 -4.17 733 -35.93 0.0072
2015-11-12 2015-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 80,673 22,599 38.91 1,144 -34.78 0.0108
2015-08-13 2015-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 58,074 29,121 100.58 1,754 101.84 0.0075
2015-05-15 2015-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 28,953 -27,711 -48.90 869 -55.89 0.0074
2015-02-13 2014-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 56,664 28,015 97.79 1,970 85.32 0.0085
2014-10-21 2014-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 28,649 -945 -3.19 1,063 -20.37 0.0094
2014-08-12 2014-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 29,594 -8,387 -22.08 1,335 -6.71 0.0114
2014-05-15 2014-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 37,981 -590 -1.53 1,431 4.15 0.0110
2014-02-11 2013-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 38,571 -1,192 -3.00 1,374 13.27 0.0107
2013-11-12 2013-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 39,763 -3,603 -8.31 1,213 6.22 0.0084
2013-08-13 2013-06-30 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 43,366 43,366 1,142 0.0093
2013-08-08 2013-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 208,712 5,494
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.