Christopher Browne - Tweedy, Browne Co
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    93
Portfolio value:    $1,258,817,374
Holdings Activity Buys Sells    History
Holding/activity history for  Ionis Pharmaceuticals, Inc. (IONS)
← All IONS superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2026   Q1 2,275,625 13.57 Reduce 7.68% 1.21 $68.90–86.74 · VW $79.31i $170,876,681 SEC
2025   Q4 2,464,930 15.76 Reduce 15.04% 2.48 $64.93–83.61 · VW $76.17i $195,000,612 SEC
2025   Q3 2,901,216 16.48 Add 0.32% 0.05 $39.72–65.55 · VW $50.53i $189,797,551 SEC
2025   Q2 2,891,948 10.60 Reduce 3.07% 0.24 $23.95–40.61 · VW $32.89i $114,260,865 SEC
2025   Q1 2,983,518 7.98 Reduce 8.17% 0.63 $29.61–35.48 · VW $32.41i $90,012,738 SEC
2024   Q4 3,248,863 7.66 Reduce 5.96% 0.39 $33.33–40.58 · VW $37.23i $113,580,250 SEC
2024   Q3 3,454,676 6.60 $40.06 $138,394,321 SEC
2024   Q2 3,454,676 7.57 $47.66 $164,649,858 SEC
2024   Q1 3,454,676 7.03 $43.35 $149,760,205 SEC
2023   Q4 3,454,676 8.58 Reduce 1.58% 0.14 $41.84–52.27 · VW $47.67i $174,772,059 SEC
2023   Q3 3,510,173 8.57 Reduce 0.87% 0.07 $38.26–47.72 · VW $42.00i $159,221,447 SEC
2023   Q2 3,540,858 7.66 Reduce 0.01% <0.01 $34.32–43.55 · VW $39.47i $145,281,000 SEC
2023   Q1 3,541,046 6.93 Reduce 0.00% <0.01 $32.69–41.73 · VW $37.35i $126,557,000 SEC
2022   Q4 3,541,136 7.16 Add 30.05% 1.65 $36.69–47.74 · VW $41.68i $133,749,000 SEC
2022   Q3 2,722,988 5.30 Reduce 0.14% <0.01 $35.95–48.82 · VW $42.04i $120,438,000 SEC
2022   Q2 2,726,778 4.13 Reduce 6.78% 0.24 $31.46–44.42 · VW $37.29i $100,945,000 SEC
2022   Q1 2,925,102 3.50 Buy 3.50 $28.25–37.15 · VW $32.76i $108,346,000 SEC
Price snapshot:
Current price$56.75
Avg. buy price$37.30
+/- since buy52.15%
52-week low$40.03
52-week high$86.74