ATI Inc.
MX ˙ BMV ˙ US01741R1023
SecurityMX:ATI / ATI Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership2,947,325 shares
Latest Disclosed Value $ 428,807,254
Geode Capital Management, Llc reports 21.83% increase in ownership of ATI / ATI Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 2,947,325 shares of ATI Inc. (MX:ATI) valued at $428,807,254 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 2,419,168 shares of ATI Inc.. This represents a change in shares of 21.83% 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)
2026-05-15 2026-03-31 13F ATI COM 01741R102 2,947,325 528,157 21.83 428,807 54.42 0.0143
2026-02-09 2025-12-31 13F ATI COM 01741R102 2,419,168 -25,505 -1.04 277,683 39.62 0.0171
2025-11-12 2025-09-30 13F ATI COM 01741R102 2,444,673 8,757 0.36 198,887 -5.45 0.0127
2025-08-08 2025-06-30 13F ATI COM 01741R102 2,435,916 57,883 2.43 210,353 69.96 0.0147
2025-05-13 2025-03-31 13F ATI COM 01741R102 2,378,033 227,829 10.60 123,769 4.54 0.0097
2025-02-12 2024-12-31 13F ATI COM 01741R102 2,150,204 197,270 10.10 118,389 -9.43 0.0092
2024-11-12 2024-09-30 13F ATI COM 01741R102 1,952,934 5,165 0.27 130,709 20.99 0.0106
2024-08-09 2024-06-30 13F ATI COM 01741R102 1,947,769 -822,607 -29.69 108,035 -23.80 0.0095
2024-05-13 2024-03-31 13F ATI COM 01741R102 2,770,376 70,962 2.63 141,781 15.50 0.0131
2024-02-13 2023-12-31 13F ATI COM 01741R102 2,699,414 121,690 4.72 122,757 15.71 0.0128
2023-11-13 2023-09-30 13F ATI COM 01741R102 2,577,724 100,575 4.06 106,087 -3.17 0.0126
2023-08-11 2023-06-30 13F ATI COM 01741R102 2,477,149 120,072 5.09 109,564 17.80 0.0129
2023-05-15 2023-03-31 13F ATI COM 01741R102 2,357,077 101,022 4.48 93,010 138,720.90 0.0121
2023-02-13 2022-12-31 13F ATI COM 01741R102 2,256,055 81,073 3.73 67 -99.88 0.0095
2022-11-14 2022-09-30 13F ATI COM 01741R102 2,174,982 88,713 4.25 57,876 22.16 0.0088
2022-08-12 2022-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,086,269 -82,847 -3.82 47,379 -18.62 0.0069
2022-05-13 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,169,116 67,101 3.19 58,219 73.87 0.0073
2022-02-11 2021-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,102,015 -27,072 -1.27 33,485 -5.43 0.0040
2021-11-12 2021-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,129,087 23,250 1.10 35,406 -19.36 0.0048
2021-08-13 2021-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,105,837 76,174 3.75 43,906 2.72 0.0060
2021-05-12 2021-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,029,663 175,482 9.46 42,744 37.47 0.0065
2021-02-12 2020-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,854,181 76,672 4.31 31,094 100.62 0.0052
2020-11-13 2020-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,777,509 -67,857 -3.68 15,499 -17.58 0.0030
2020-08-13 2020-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,845,366 52,538 2.93 18,804 23.40 0.0040
2020-05-14 2020-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,792,828 111,492 6.63 15,238 -56.13 0.0040
2020-02-20 2019-12-31 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 1,681,336 99,509 6.29 34,735 8.44 0.0073
2020-02-13 2019-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,681,336 99,509 34,735 4,426.6712
2019-11-12 2019-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,581,827 20,824 1.33 32,031 -18.57 0.0075
2019-08-14 2019-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,561,003 119,402 8.28 39,337 6.72 0.0095
2019-05-14 2019-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,441,601 112,824 8.49 36,861 27.43 0.0096
2019-03-06 2018-12-31 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 1,328,777 96,014 7.79 28,927 -20.59 0.0089
2019-02-13 2018-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,328,777 96,014 28,927
2018-11-13 2018-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,232,763 68,946 5.92 36,428 24.60 0.0103
2018-08-14 2018-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,163,817 107,442 10.17 29,235 16.87 0.0090
2018-05-15 2018-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,056,375 12,575 1.20 25,014 -0.73 0.0081
2018-02-13 2017-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 1,043,800 153,086 17.19 25,197 18.36 0.0086
2017-11-14 2017-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 890,714 37,585 4.41 21,288 46.70 0.0079
2017-08-14 2017-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 853,129 32,207 3.92 14,511 -1.57 0.0057
2017-06-21 2017-03-31 13F/A-1 ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 820,922 8,605 1.06 14,743 13.94 0.0060
2017-05-12 2017-03-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 820,922 14,743
2017-02-14 2016-12-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 812,317 51,270 6.74 12,939 -5.91 0.0060
2016-11-10 2016-09-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 761,047 43,149 6.01 13,751 50.23 0.0069
2016-08-12 2016-06-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 717,898 40,949 6.05 9,153 -17.05 0.0050
2016-05-13 2016-03-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 676,949 34,877 5.43 11,034 52.76 0.0059
2016-02-12 2015-12-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 642,072 -3,114 -0.48 7,223 -21.04 0.0041
2015-11-13 2015-09-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 645,186 -215,069 -25.00 9,148 -64.73 0.0055
2015-08-14 2015-06-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 860,255 1,026 0.12 25,940 0.72 0.0148
2015-05-14 2015-03-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 859,229 40,170 4.90 25,754 -9.48 0.0147
2015-02-12 2014-12-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 819,059 25,619 3.23 28,452 -3.24 0.0169
2014-11-14 2014-09-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 793,440 -6,489 -0.81 29,404 -18.46 0.0191
2014-08-13 2014-06-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 799,929 -10,298 -1.27 36,060 18.16 0.0233
2014-05-14 2014-03-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 810,227 2,570 0.32 30,519 6.08 0.0205
2014-02-14 2013-12-31 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 807,657 66,435 8.96 28,770 27.20 0.0199
2013-11-14 2013-09-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 741,222 27,647 3.87 22,618 20.49 0.0181
2013-08-14 2013-06-30 13F ALLEGHENY TECHNOLOGIES INC COM COM 01741R102 713,575 713,575 18,771 0.0165
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.