ATI Inc.
MX ˙ BMV ˙ US01741R1023
SecurityMX:ATI / ATI Inc.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership525 shares
Latest Disclosed Value $ 76,438
Signaturefd, Llc reports 19.05% increase in ownership of ATI / ATI Inc.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 525 shares of ATI Inc. (MX:ATI) valued at $76,438 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 441 shares of ATI Inc.. This represents a change in shares of 19.05% 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)
2026-04-07 2026-03-31 13F ATI COM 01741R102 525 84 19.05 76 52.00 0.0012
2026-01-20 2025-12-31 13F ATI COM 01741R102 441 20 4.75 51 47.06 0.0008
2025-10-21 2025-09-30 13F ATI COM 01741R102 421 40 10.50 34 6.25 0.0005
2025-07-16 2025-06-30 13F ATI COM 01741R102 381 206 117.71 33 255.56 0.0006
2025-05-02 2025-03-31 13F ATI COM 01741R102 175 5 2.94 9 0.00 0.0002
2025-02-10 2024-12-31 13F ATI COM 01741R102 170 -66 -27.97 9 -40.00 0.0002
2024-10-21 2024-09-30 13F ATI COM 01741R102 236 66 38.82 16 66.67 0.0003
2024-07-29 2024-06-30 13F ATI COM 01741R102 170 10 6.25 9 12.50 0.0002
2024-05-03 2024-03-31 13F ATI COM 01741R102 160 0 0.00 8 14.29 0.0002
2024-02-01 2023-12-31 13F ATI COM 01741R102 160 0 0.00 7 16.67 0.0002
2023-11-03 2023-09-30 13F ATI COM 01741R102 160 0 0.00 7 -14.29 0.0002
2023-08-01 2023-06-30 13F ATI COM 01741R102 160 -3 -1.84 7 16.67 0.0002
2023-04-28 2023-03-31 13F ATI COM 01741R102 163 -86 -34.54 6 -14.29 0.0002
2023-01-30 2022-12-31 13F ATI COM 01741R102 249 11 4.62 7 16.67 0.0002
2022-11-08 2022-09-30 13F ATI COM 01741R102 238 152 176.74 6 200.00 0.0002
2022-08-10 2022-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 2 0.00 0.0001
2022-05-02 2022-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 2 100.00 0.0001
2022-01-25 2021-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 1 0.00 0.0000
2021-10-28 2021-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 1 -50.00 0.0000
2021-07-26 2021-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 2 0.00 0.0001
2021-04-30 2021-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 0 0.00 2 100.00 0.0001
2021-02-11 2020-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 86 86 1 0.0000
2020-11-03 2020-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 0 -55 -100.00 0 -100.00
2020-07-30 2020-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 55 -746 -93.13 1 -85.71 0.0001
2020-04-23 2020-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 801 172 27.34 7 -46.15 0.0006
2020-02-05 2019-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 629 -5 -0.79 13 0.00 0.0010
2019-10-16 2019-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 634 -66 -9.43 13 -27.78 0.0011
2019-07-31 2019-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 700 -148 -17.45 18 -18.18 0.0016
2019-05-09 2019-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 848 0 0.00 22 22.22 0.0019
2019-02-13 2018-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 848 270 46.71 18 5.88 0.0017
2018-11-14 2018-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 578 0 0.00 17 13.33 0.0017
2018-08-14 2018-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 578 -1,749 -75.16 15 -72.73 0.0017
2018-05-08 2018-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 2,327 2,327 55 0.0065
2017-02-14 2016-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 0 -529 -100.00 0 -100.00
2016-11-14 2016-09-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 529 0 0.00 10 42.86 0.0015
2016-07-29 2016-06-30 13F ALLEGHENY TECHNOLOGIES COM 01741R102 529 -95 -15.22 7 -30.00 0.0010
2016-05-12 2016-03-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 624 399 177.33 10 233.33 0.0017
2016-01-22 2015-12-31 13F ALLEGHENY TECHNOLOGIES COM 01741R102 225 225 3 0.0006
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.