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IONS
Showing 9 of 19 quarters
Position history for TBTweedy, Browne Co LLC's holdings in Ionis Pharmaceuticals, Inc.
Yes. Tweedy, Browne holds 1,793,400 shares of IONS (Ionis Pharmaceuticals), worth $80.1M, as of its Q3 2026 13F filing. It reduced the position by 486,911 shares (-21.4%) from Q2 2026. Tweedy, Browne has held IONS since Q1 2022, across 19 quarterly 13F filings. IONS is 6.5% of Tweedy, Browne's reported 13F portfolio.
Current Value
$80.1M
Current Shares
1.8M
Total Value Change
-$58.3M
Total Shares Change
-1.7M
Quarter-by-Quarter History
Other major holders of IONS: FMR LLC, Capital World Investors