3 hedge funds and family offices disclose a IONS position in their latest SEC 13F filing — combined $204.7M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Tweedy Browne | Tweedy Browne Company LLC | 2,280,311 | $180.8M | 13.70% | 2026-06-30 |
| 2 | Cathie Wood | ARK Investment Management LLC | 300,770 | $23.8M | 0.15% | 2026-06-30 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 71 | $6K | 0.00% | 2025-12-31 |
As of the latest 13F window, 3 tracked superinvestors hold IONS. The largest disclosed position is Tweedy Browne at $180.8M (13.7% 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 IONS, 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 IONS position in their latest SEC 13F filing — combined $204.7M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Tweedy Browne | Tweedy Browne Company LLC | 2,280,311 | $180.8M | 13.70% | 2026-06-30 |
| 2 | Cathie Wood | ARK Investment Management LLC | 300,770 | $23.8M | 0.15% | 2026-06-30 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 71 | $6K | 0.00% | 2025-12-31 |
As of the latest 13F window, 3 tracked superinvestors hold IONS. The largest disclosed position is Tweedy Browne at $180.8M (13.7% 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 IONS, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
