ATI Inc.
MX ˙ BMV ˙ US01741R1023
SecurityMX:ATI / ATI Inc.
InstitutionPathstone Holdings, LLC
Latest Disclosed Ownership43,146 shares
Latest Disclosed Value $ 6,276,019
Pathstone Holdings, LLC reports 4.86% decrease in ownership of ATI / ATI Inc.

On May 11, 2026 - Pathstone Holdings, LLC filed a 13F-HR form disclosing ownership of 43,146 shares of ATI Inc. (MX:ATI) valued at $6,276,019 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 45,351 shares of ATI Inc.. This represents a change in shares of -4.86% 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)
2026-05-11 2026-03-31 13F ATI COM 01741R102 43,146 -2,205 -4.86 6,276 20.60 0.0135
2026-02-13 2025-12-31 13F ATI COM 01741R102 45,351 -2,733 -5.68 5,204 33.06 0.0201
2025-11-13 2025-09-30 13F ATI COM 01741R102 48,084 270 0.56 3,911 -5.26 0.0149
2025-08-12 2025-06-30 13F ATI COM 01741R102 47,814 -15,063 -23.96 4,128 26.05 0.0163
2025-05-15 2025-03-31 13F ATI COM 01741R102 62,877 -4,956 -7.31 3,276 -12.27 0.0142
2025-02-14 2024-12-31 13F ATI COM 01741R102 67,833 179 0.26 3,734 -17.52 0.0165
2024-11-07 2024-09-30 13F ATI COM 01741R102 67,654 -3,831 -5.36 4,527 14.21 0.0200
2024-08-14 2024-06-30 13F ATI COM 01741R102 71,485 145 0.20 3,964 8.58 0.0179
2024-05-13 2024-03-31 13F ATI COM 01741R102 71,340 45,248 173.42 3,650 207.76 0.0170
2024-02-14 2023-12-31 13F ATI COM 01741R102 26,092 26,092 1,186 0.0064
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.