Fortuna Mining Corp.
US ˙ NYSE

SecurityFSM / Fortuna Mining Corp.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership229,149 shares
Latest Disclosed Value $ 2,275,450
Engineers Gate Manager LP reports 169.02% increase in ownership of FSM / Fortuna Mining Corp.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 229,149 shares of Fortuna Mining Corp. (US:FSM) valued at $2,275,450 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 85,180 shares of Fortuna Mining Corp.. This represents a change in shares of 169.02% during the quarter. The current value of the position is $2,158,584 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)
2026-05-15 2026-03-31 13F FORTUNA MNG COM NEW 349942102 229,149 143,969 169.02 2,275 172.46 0.0284
2026-02-17 2025-12-31 13F FORTUNA MNG COM NEW 349942102 85,180 -172,324 -66.92 836 -63.81 0.0099
2025-11-14 2025-09-30 13F FORTUNA MNG COM NEW 349942102 257,504 -38,584 -13.03 2,307 19.16 0.0264
2025-08-14 2025-06-30 13F FORTUNA MNG COM NEW 349942102 296,088 178,288 151.35 1,936 169.64 0.0241
2025-05-15 2025-03-31 13F FORTUNA MNG COM NEW 349942102 117,800 43,844 59.28 719 126.50 0.0121
2025-02-14 2024-12-31 13F FORTUNA MNG COM NEW 349942102 73,956 58,106 366.60 317 334.25 0.0055
2024-11-14 2024-09-30 13F FORTUNA MNG COM NEW 349942102 15,850 -34,267 -68.37 73 -70.20 0.0014
2024-08-14 2024-06-30 13F FORTUNA MNG COM NEW 349942102 50,117 50,117 245 0.0055
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.