Position in IONS
as of Mar 31, 2026
· filed May 6, 2026
Position Value
$170,876,681
-$24,123,931 QoQ
Shares Held
2,275,625
-7.7% QoQ
Ownership
1.38%
of shares outstanding
% of Portfolio
15.09%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2022
17 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Tweedy, Browne Co LLC holds $200,293,602 across 3 Biotechnology names. IONS ranks #1 (85.3% of the industry book) .
All Filings in IONS
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17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $170,876,681 | 2,275,625 | Shares | Sole | 2026-05-06 | |
| 2025-12-31 | $195,000,612 | 2,464,930 | Shares | Sole | 2026-02-03 | |
| 2025-09-30 | $189,797,550 | 2,901,216 | Shares | Sole | 2025-11-20 | |
| 2025-06-30 | $114,260,865 | 2,891,948 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $90,012,738 | 2,983,518 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $113,580,250 | 3,248,863 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $138,394,320 | 3,454,676 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $164,649,858 | 3,454,676 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $149,760,204 | 3,454,676 | Shares | Sole | 2024-05-06 | |
| 2023-12-31 | $174,772,058 | 3,454,676 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $159,221,447 | 3,510,173 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $145,281,403 | 3,540,858 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $126,556,984 | 3,541,046 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $133,748,706 | 3,541,136 | Shares | Sole | 2023-02-09 | |
| 2022-09-30 | $120,437,759 | 2,722,988 | Shares | Sole | 2022-11-15 | |
| 2022-06-30 | $100,945,321 | 2,726,778 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $108,345,778 | 2,925,102 | Shares | Sole | 2022-05-13 | |
| No filing history on record for this holder in this stock. | ||||||