2 hedge funds and family offices disclose a MASI position in their latest SEC 13F filing — combined $18.3M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | George Soros | Soros Fund Management LLC | 100,838 | $17.9M | 0.25% | 2026-03-31 |
| 2 | Ray Dalio | Bridgewater Associates LP | 1,899 | $338K | 0.00% | 2026-03-31 |
As of the latest 13F window, 2 tracked superinvestors hold MASI. The largest disclosed position is George Soros at $17.9M (0.2% 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 MASI, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
2 hedge funds and family offices disclose a MASI position in their latest SEC 13F filing — combined $18.3M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | George Soros | Soros Fund Management LLC | 100,838 | $17.9M | 0.25% | 2026-03-31 |
| 2 | Ray Dalio | Bridgewater Associates LP | 1,899 | $338K | 0.00% | 2026-03-31 |
As of the latest 13F window, 2 tracked superinvestors hold MASI. The largest disclosed position is George Soros at $17.9M (0.2% 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 MASI, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
