Ero Copper Corp.
US ˙ NYSE ˙ CA2960061091

SecurityERO / Ero Copper Corp.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership986,385 shares
Latest Disclosed Value $ 26,297,889
Dimensional Fund Advisors Lp reports 2.95% increase in ownership of ERO / Ero Copper Corp.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 986,385 shares of Ero Copper Corp. (US:ERO) valued at $26,306,888 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 958,154 shares of Ero Copper Corp.. This represents a change in shares of 2.95% during the quarter. The current value of the position is $30,548,343 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)
2026-05-07 2026-03-31 13F ERO COPPER COM 296006109 986,385 28,231 2.95 26,298 -2.99 0.0012
2026-02-12 2025-12-31 13F ERO COPPER COM 296006109 958,154 190,799 24.86 27,108 74.64 0.0057
2025-11-12 2025-09-30 13F ERO COPPER COM 296006109 767,355 -32,090 -4.01 15,522 15.23 0.0033
2025-08-12 2025-06-30 13F ERO COPPER COM 296006109 799,445 -11,798 -1.45 13,470 37.00 0.0031
2025-05-13 2025-03-31 13F ERO COPPER COM 296006109 811,243 41,443 5.38 9,833 -5.24 0.0024
2025-02-13 2024-12-31 13F ERO COPPER COM 296006109 769,800 157,504 25.72 10,376 -23.91 0.0025
2024-11-07 2024-09-30 13F ERO COPPER COM 296006109 612,296 148,249 31.95 13,636 37.45 0.0033
2024-08-09 2024-06-30 13F ERO COPPER COM 296006109 464,047 115,002 32.95 9,922 47.44 0.0026
2024-05-10 2024-03-31 13F ERO COPPER COM 296006109 349,045 79,736 29.61 6,730 58.25 0.0018
2024-02-07 2023-12-31 13F ERO COPPER COM 296006109 269,309 53,703 24.91 4,252 14.39 0.0012
2023-11-09 2023-09-30 13F ERO COPPER COM 296006109 215,606 132,797 160.37 3,717 121.91 0.0012
2023-08-09 2023-06-30 13F ERO COPPER COM 296006109 82,809 82,809 1,675 0.0005
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.