ATI Inc.
US ˙ NYSE ˙ US01741R1023

SecurityATI / ATI Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership62,536 shares
Latest Disclosed Value $ 9,096
Amalgamated Bank reports 1.93% increase in ownership of ATI / ATI Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 62,536 shares of ATI Inc. (US:ATI) valued at $9,096,487 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 61,354 shares of ATI Inc.. This represents a change in shares of 1.93% during the quarter. The current value of the position is $11,252,728 USD.

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)
2026-05-08 2026-03-31 13F ATI COM 01741R102 62,536 1,182 1.93 9 28.57 0.0696
2026-02-05 2025-12-31 13F ATI COM 01741R102 61,354 -1,666 -2.64 7 40.00 0.0508
2025-10-29 2025-09-30 13F ATI COM 01741R102 63,020 -1,047 -1.63 5 0.00 0.0366
2025-08-04 2025-06-30 13F ATI COM 01741R102 64,067 -181 -0.28 6 66.67 0.0427
2025-04-25 2025-03-31 13F ATI COM 01741R102 64,248 20,773 47.78 3 50.00 0.0286
2025-02-04 2024-12-31 13F ATI COM 01741R102 43,475 4,523 11.61 2 0.00 0.0196
2024-10-30 2024-09-30 13F ATI COM 01741R102 38,952 -8,297 -17.56 3 0.00 0.0215
2024-08-12 2024-06-30 13F ATI COM 01741R102 47,249 6,876 17.03 3 0.00 0.0223
2024-04-23 2024-03-31 13F ATI COM 01741R102 40,373 -14,588 -26.54 2 0.00 0.0177
2024-02-06 2023-12-31 13F ATI COM 01741R102 54,961 -2,463 -4.29 2 0.00 0.0199
2023-11-08 2023-09-30 13F ATI COM 01741R102 57,424 -1,062 -1.82 2 0.00 0.0201
2023-08-11 2023-06-30 13F ATI COM 01741R102 58,486 -81 -0.14 3 0.00 0.0209
2023-05-02 2023-03-31 13F ATI COM 01741R102 58,567 -3,846 -6.16 2 100.00 0.0197
2023-02-10 2022-12-31 13F ATI COM 01741R102 62,413 -262 -0.42 2 -99.94 0.0166
2022-11-09 2022-09-30 13F ATI COM 01741R102 62,675 2,861 4.78 1,668 22.83 0.0161
2022-08-15 2022-06-30 13F ATI COM 01741R102 59,814 -218 -0.36 1,358 -15.70 0.0127
2022-08-25 2022-03-31 13F/A-1 ATI COM 01741R102 60,032 -3,582 -5.63 1,611 59.03 0.0125
2022-06-30 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 60,032 -3,582 1,611 0.0128
2022-02-15 2021-12-31 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 63,614 -1,062 -1.64 1,013 -5.86 0.0075
2022-02-15 2021-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 63,614 -1,062 1,013 0.0075
2021-10-29 2021-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 64,676 -1,244 -1.89 1,076 -21.69 0.0091
2021-08-16 2021-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 65,920 54,580 481.31 1,374 474.90 0.0110
2021-05-13 2021-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 11,340 -750 -6.20 239 17.73 0.0090
2021-02-12 2020-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 12,090 104 0.87 203 93.33 0.0077
2020-10-30 2020-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 11,986 -74 -0.61 105 -14.63 0.0046
2020-08-10 2020-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 12,060 -8,792 -42.16 123 -30.51 0.0057
2020-05-13 2020-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 20,852 -859 -3.96 177 -60.58 0.0043
2020-02-13 2019-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 21,711 2,336 12.06 449 14.54 0.0083
2019-11-13 2019-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 19,375 -429 -2.17 392 -21.44 0.0082
2019-08-14 2019-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 19,804 1,198 6.44 499 4.83 0.0116
2019-05-15 2019-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 18,606 633 3.52 476 21.74 0.0115
2019-02-15 2018-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 17,973 -106 -0.59 391 -26.78 0.0111
2018-11-14 2018-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 18,079 -160 -0.88 534 16.59 0.0132
2018-07-18 2018-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 18,239 517 2.92 458 9.05 0.0112
2018-05-22 2018-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 17,722 -239 -1.33 420 -3.23 0.0111
2018-02-13 2017-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 17,961 3,336 22.81 434 24.00 0.0117
2017-11-09 2017-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 14,625 -824 -5.33 350 33.08 0.0109
2017-08-10 2017-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 15,449 186 1.22 263 -4.01 0.0086
2017-05-12 2017-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 15,263 22 0.14 274 12.76 0.0136
2017-02-14 2016-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 15,241 1,739 12.88 243 -0.41 0.0110
2016-11-15 2016-09-30 13F/A-1 ALLEGHENY TECHNOLOGIES COM 01741R102 13,502 20 0.15 244 2.95 0.0142
2016-08-16 2016-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 13,482 277 2.10 237 10.23 0.0137
2016-05-11 2016-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 13,205 1,143 9.48 215 58.09 0.0209
2016-02-10 2015-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 12,062 -804 -6.25 136 -25.27 0.0168
2015-11-04 2015-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 12,866 -49 -0.38 182 -53.33 0.0191
2015-07-10 2015-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 12,915 12,915 390 0.0383
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.