3 hedge funds and family offices disclose a IONS position in their latest SEC 13F filing — combined $192.6M 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 | 2,275,625 | $170.9M | 13.57% | 2026-03-31 |
| 2 | Cathie Wood | ARK Investment Management LLC | 288,716 | $21.7M | 0.17% | 2026-03-31 |
| 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 $170.9M (13.6% 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 $192.6M 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 | 2,275,625 | $170.9M | 13.57% | 2026-03-31 |
| 2 | Cathie Wood | ARK Investment Management LLC | 288,716 | $21.7M | 0.17% | 2026-03-31 |
| 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 $170.9M (13.6% 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
