Alcoa Corporation
MX ˙ BMV ˙ US0138721065
SecurityMX:AA1 / Alcoa Corporation
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership66,355 shares
Latest Disclosed Value $ 4,401,327
Winton Capital Group Ltd reports 422.48% increase in ownership of AA1 / Alcoa Corporation

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 66,355 shares of Alcoa Corporation (MX:AA1) valued at $4,401,327 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 12,700 shares of Alcoa Corporation. This represents a change in shares of 422.48% 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)
2026-05-12 2026-03-31 13F ALCOA COM 013872106 66,355 53,655 422.48 4,401 552.97 0.1544
2026-02-11 2025-12-31 13F ALCOA COM 013872106 12,700 12,700 675 0.0233
2024-11-12 2024-09-30 13F ALCOA COM 013872106 0 -27,906 -100.00 0 -100.00
2024-08-09 2024-06-30 13F ALCOA COM 013872106 27,906 -6,583 -19.09 1,110 -4.72 0.0750
2024-05-14 2024-03-31 13F ALCOA COM 013872106 34,489 21,646 168.54 1,165 167.20 0.0823
2024-02-12 2023-12-31 13F ALCOA COM 013872106 12,843 12,843 437 0.0318
2023-11-13 2023-09-30 13F ALCOA COM 013872106 0 -11,513 -100.00 0 -100.00
2023-08-14 2023-06-30 13F ALCOA COM 013872106 11,513 11,513 391 0.0327
2023-05-12 2023-03-31 13F ALCOA COM 013872106 0 -7,703 -100.00 0 -100.00
2023-02-14 2022-12-31 13F ALCOA COM 013872106 7,703 -26,881 -77.73 350 -69.93 0.0231
2022-11-10 2022-09-30 13F ALCOA COM 013872106 34,584 10,333 42.61 1,164 5.34 0.0760
2022-08-10 2022-06-30 13F ALCOA COM 013872106 24,251 -10,152 -29.51 1,105 -64.32 0.0586
2022-05-11 2022-03-31 13F ALCOA COM 013872106 34,403 6,984 25.47 3,097 89.53 0.1625
2022-02-10 2021-12-31 13F ALCOA COM 013872106 27,419 5,352 24.25 1,634 51.30 0.0990
2021-10-28 2021-09-30 13F ALCOA COM 013872106 22,067 -17,859 -44.73 1,080 -26.58 0.0605
2021-08-10 2021-06-30 13F ALCOA COM 013872106 39,926 2,136 5.65 1,471 19.79 0.0790
2021-07-21 2021-03-31 13F ALCOA COM 013872106 37,790 -20,876 -35.58 1,228 -9.17 0.0701
2021-02-12 2020-12-31 13F ALCOA COM 013872106 58,666 -102,178 -63.53 1,352 -27.74 0.0976
2020-10-30 2020-09-30 13F ALCOA COM 013872106 160,844 160,844 1,871 0.0608
2020-02-13 2019-12-31 13F ALCOA COM 013872106 0 -12,032 -100.00 0 -100.00
2019-11-08 2019-09-30 13F ALCOA COM 013872106 12,032 -2,843 -19.11 241 -30.75 0.0028
2019-07-08 2019-06-30 13F ALCOA COM 013872106 14,875 -7,608 -33.84 348 -45.02 0.0068
2019-05-13 2019-03-31 13F ALCOA COM 013872106 22,483 22,483 633 0.0127
2019-02-05 2018-12-31 13F ALCOA COM 013872106 0 -386,118 -100.00 0 -100.00
2018-11-02 2018-09-30 13F ALCOA COM 013872106 386,118 60,627 18.63 15,599 2.23 0.3268
2018-08-20 2018-06-30 13F ALCOA COM 013872106 325,491 109,885 50.97 15,259 57.41 0.3899
2018-05-21 2018-03-31 13F ALCOA COM 013872106 215,606 1,794 0.84 9,694 -15.84 0.2737
2018-02-13 2017-12-31 13F ALCOA COM 013872106 213,812 128,427 150.41 11,518 189.32 0.3335
2017-11-13 2017-09-30 13F ALCOA COM 013872106 85,385 51,435 151.50 3,981 259.30 0.1268
2017-08-17 2017-06-30 13F ALCOA COM 013872106 33,950 12,111 55.46 1,108 47.54 0.0326
2017-05-19 2017-03-31 13F/A-1 ALCOA COM 013872106 21,839 7,711 54.58 751 89.17 0.0204
2017-02-13 2016-12-31 13F ALCOA COM 013872106 14,128 14,128 397 0.0131
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.