ATI Inc.
MX ˙ BMV ˙ US01741R1023
SecurityMX:ATI / ATI Inc.
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership303,158 shares
Latest Disclosed Value $ 44,097,363
Principal Financial Group Inc reports 3.77% increase in ownership of ATI / ATI Inc.

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 303,158 shares of ATI Inc. (MX:ATI) valued at $44,097,363 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 292,144 shares of ATI Inc.. This represents a change in shares of 3.77% 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)
2026-05-04 2026-03-31 13F ATI COM 01741R102 303,158 11,014 3.77 44,097 31.53 0.0120
2026-02-02 2025-12-31 13F ATI COM 01741R102 292,144 -13,999 -4.57 33,526 34.64 0.0171
2025-11-04 2025-09-30 13F ATI COM 01741R102 306,143 -13,656 -4.27 24,902 -9.81 0.0126
2025-08-08 2025-06-30 13F ATI COM 01741R102 319,799 -7,421 -2.27 27,611 62.18 0.0146
2025-04-28 2025-03-31 13F ATI COM 01741R102 327,220 -362,995 -52.59 17,025 -55.18 0.0096
2025-01-31 2024-12-31 13F ATI COM 01741R102 690,215 104,267 17.79 37,989 -3.10 0.0207
2024-10-31 2024-09-30 13F ATI COM 01741R102 585,948 -24,867 -4.07 39,206 15.75 0.0216
2024-07-29 2024-06-30 13F ATI COM 01741R102 610,815 -54,254 -8.16 33,870 -0.48 0.0201
2024-04-29 2024-03-31 13F ATI COM 01741R102 665,069 1,315 0.20 34,032 12.76 0.0200
2024-02-07 2023-12-31 13F ATI COM 01741R102 663,754 -23,747 -3.45 30,181 6.68 0.0192
2023-11-02 2023-09-30 13F ATI COM 01741R102 687,501 -44,439 -6.07 28,291 -12.61 0.0203
2023-08-07 2023-06-30 13F ATI COM 01741R102 731,940 -48,453 -6.21 32,374 5.13 0.0221
2023-05-09 2023-03-31 13F ATI COM 01741R102 780,393 -16,467 -2.07 30,794 29.42 0.0220
2023-02-09 2022-12-31 13F ATI COM 01741R102 796,860 -7,795 -0.97 23,794 11.12 0.0179
2022-11-09 2022-09-30 13F ATI COM 01741R102 804,655 25,972 3.34 21,412 21.08 0.0170
2022-08-10 2022-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 778,683 -79,131 -9.22 17,684 -23.19 0.0131
2022-05-09 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 857,814 -6,823 -0.79 23,024 67.17 0.0091
2022-05-09 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 18,076 485
2022-02-09 2021-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 864,637 -23,555 -2.65 13,773 -6.76 0.0082
2021-11-09 2021-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 888,192 -9,813 -1.09 14,771 -21.11 0.0096
2021-08-10 2021-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 898,005 13,469 1.52 18,723 0.51 0.0121
2021-05-10 2021-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 884,536 12,147 1.39 18,628 27.33 0.0131
2021-02-23 2020-12-31 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 872,389 -34,070 -3.76 14,630 85.10 0.0108
2021-02-08 2020-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 872,389 -34,070 14,630 5,755.6675
2020-11-06 2020-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 906,459 512,958 130.36 7,904 97.11 0.0067
2020-08-05 2020-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 393,501 3,858 0.99 4,010 21.07 0.0036
2020-05-12 2020-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 389,643 -146,775 -27.36 3,312 -70.11 0.0037
2020-02-05 2019-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 536,418 -185 -0.03 11,082 1.99 0.0092
2019-11-13 2019-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 536,603 -9,770 -1.79 10,866 -21.08 0.0096
2019-08-12 2019-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 546,373 -6,626 -1.20 13,769 -2.62 0.0124
2019-05-10 2019-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 552,999 1,398 0.25 14,140 17.75 0.0132
2019-02-14 2018-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 551,601 -7,770 -1.39 12,008 -27.35 0.0128
2018-11-14 2018-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 559,371 6,279 1.14 16,529 18.97 0.0146
2018-08-13 2018-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 553,092 7,849 1.44 13,893 7.60 0.0128
2018-05-14 2018-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 545,243 13,736 2.58 12,912 0.63 0.0124
2018-02-12 2017-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 531,507 71,189 15.47 12,831 16.62 0.0118
2017-11-02 2017-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 460,318 1,960 0.43 11,002 41.11 0.0107
2017-08-08 2017-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 458,358 19,012 4.33 7,797 -1.19 0.0078
2017-05-11 2017-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 439,346 8,755 2.03 7,891 15.03 0.0095
2017-02-13 2016-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 430,591 6,878 1.62 6,860 -10.41 0.0087
2016-11-10 2016-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 423,713 17,295 4.26 7,657 47.76 0.0101
2016-08-09 2016-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 406,418 47,130 13.12 5,182 -11.51 0.0072
2016-05-10 2016-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 359,288 31,282 9.54 5,856 58.70 0.0085
2016-02-09 2015-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 328,006 8,934 2.80 3,690 -18.44 0.0055
2015-11-12 2015-09-30 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 319,072 183,284 134.98 4,524 10.31 0.0071
2015-11-09 2015-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 319,072 4,524
2015-08-10 2015-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 135,788 3,684 2.79 4,101 3.43 0.0061
2015-05-14 2015-03-31 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 132,104 5,529 4.37 3,965 -9.91 0.0059
2015-05-12 2015-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 132,104 3,964
2015-02-12 2014-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 126,575 -6,359 -4.78 4,401 -10.75 0.0068
2014-11-13 2014-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 132,934 3,096 2.38 4,931 -15.80 0.0084
2014-08-12 2014-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 129,838 14,688 12.76 5,856 34.96 0.0098
2014-05-13 2014-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 115,150 1,962 1.73 4,339 7.59 0.0077
2014-02-12 2013-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 113,188 878 0.78 4,033 17.65 0.0075
2013-11-05 2013-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 112,310 3,587 3.30 3,428 19.82 0.0071
2013-08-12 2013-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 108,723 108,723 2,861 0.0063
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.