3 hedge funds and family offices disclose a MTRN position in their latest SEC 13F filing — combined $1.5M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Ray Dalio | Bridgewater Associates LP | 3,213 | $956K | 0.00% | 2026-06-30 |
| 2 | George Soros | Soros Fund Management LLC | 1,437 | $427K | 0.01% | 2026-06-30 |
| 3 | Cathie Wood | ARK Investment Management LLC | 455 | $135K | 0.00% | 2026-06-30 |
As of the latest 13F window, 3 tracked superinvestors hold MTRN. The largest disclosed position is Ray Dalio at $956K (0.0% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MTRN, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
3 hedge funds and family offices disclose a MTRN position in their latest SEC 13F filing — combined $1.5M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Ray Dalio | Bridgewater Associates LP | 3,213 | $956K | 0.00% | 2026-06-30 |
| 2 | George Soros | Soros Fund Management LLC | 1,437 | $427K | 0.01% | 2026-06-30 |
| 3 | Cathie Wood | ARK Investment Management LLC | 455 | $135K | 0.00% | 2026-06-30 |
As of the latest 13F window, 3 tracked superinvestors hold MTRN. The largest disclosed position is Ray Dalio at $956K (0.0% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MTRN, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
