# FORTUNA MINING CORP (FSM) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 349942102
Page URL: https://superinvestorclub.com/stock/FSM
Last updated: 2026-08-29T13:45:37.201Z

## Summary

As of the most recent 13F filing period, FORTUNA MINING CORP (FSM) is held by 1 tracked superinvestors with an aggregate position value of $17.6M representing 02086645 shares.

## Top institutional holders (1)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Sarah Ketterer](https://superinvestorclub.com/manager/293) | Causeway Capital Management | 2086645 | $17.6M | 0.19% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2025-09-30: 1 holders, $1.0M aggregate, 0115867 shares
- 2025-12-31: 1 holders, $8.5M aggregate, 0863628 shares
- 2026-03-31: 1 holders, $12.4M aggregate, 01251045 shares
- 2026-06-30: 1 holders, $17.6M aggregate, 02086645 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "FORTUNA MINING CORP (FSM) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/FSM), aggregating SEC 13F, Form 4, and congressional disclosures."