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Equibles

Tweedy, Browne Co LLC

Position in IONS — Ionis Pharmaceuticals Inc

CIK 732905 Stamford, CT
Back to IONS Full portfolio

Position in IONS

as of Jun 30, 2026 · filed Aug 7, 2026
Position Value
$180,805,859
+$9,929,178 QoQ
Shares Held
2,280,311
+0.2% QoQ
Ownership
1.37%
of shares outstanding
% of Portfolio
13.81%
of 13F equity value
Holder Rank
#15
of 513 holders
Holding Since
Mar 2022
18 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in IONS Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

Tweedy, Browne Co LLC holds $215,229,267 across 3 Biotechnology names. IONS ranks #1 (84.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 IONS
Ionis Pharmaceuticals Inc
This page 		2,280,311 $180,805,859
2 VRTX
Vertex Pharmaceuticals Inc / Ma
 40,121 $19,929,304
3 JAZZ
Jazz Pharmaceuticals plc
 60,149 $14,494,104

All Filings in IONS

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18 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $180,805,859 2,280,311
2026-03-31 $170,876,681 2,275,625
2025-12-31 $195,000,612 2,464,930
2025-09-30 $189,797,550 2,901,216
2025-06-30 $114,260,865 2,891,948
2025-03-31 $90,012,738 2,983,518
2024-12-31 $113,580,250 3,248,863
2024-09-30 $138,394,320 3,454,676
2024-06-30 $164,649,858 3,454,676
2024-03-31 $149,760,204 3,454,676
2023-12-31 $174,772,058 3,454,676
2023-09-30 $159,221,447 3,510,173
2023-06-30 $145,281,403 3,540,858
2023-03-31 $126,556,984 3,541,046
2022-12-31 $133,748,706 3,541,136
2022-09-30 $120,437,759 2,722,988
2022-06-30 $100,945,321 2,726,778
2022-03-31 $108,345,778 2,925,102