IONIS PHARMACEUTICALS INC

Ticker: IONS CUSIP: 462222100 Class: COM

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025
Shares 341 Value ($000) $27 Avg Close $75.30 Range $64.93 - $83.61
Q2 2021
Shares 200 Value ($000) $8 Avg Close $39.17 Range $34.43 - $47.87
Q1 2021
Shares 2,350 Value ($000) $106 Avg Close $55.77 Range $41.42 - $64.37
Q4 2020
Shares 200 Value ($000) $11 Avg Close $49.83 Range $45.09 - $60.95
Q1 2020
Shares 360 Value ($000) $17 Avg Close $55.74 Range $39.32 - $64.34
Q4 2019
Shares 544 Value ($000) $33 Avg Close $59.58 Range $53.34 - $66.22
Q3 2019
Shares 550 Value ($000) $33 Avg Close $65.17 Range $58.48 - $73.09
Q2 2019
Shares 371 Value ($000) $24 Avg Close $70.69 Range $61.91 - $86.58
Q1 2019
Shares 305 Value ($000) $25 Avg Close $64.51 Range $52.45 - $81.59
Q4 2018
Shares 182 Value ($000) $10 Avg Close $51.00 Range $43.27 - $59.81
Q3 2018
Shares 182 Value ($000) $9 Avg Close $46.98 Range $41.05 - $54.85
Q2 2018
Shares 182 Value ($000) $8 Avg Close $44.30 Range $39.07 - $51.00
Q1 2018
Shares 182 Value ($000) $8 Avg Close $50.80 Range $43.38 - $56.47
Q4 2017
Shares 277 Value ($000) $14 Avg Close $54.84 Range $50.02 - $65.51
Q3 2017
Shares 182 Value ($000) $9 Avg Close $52.38 Range $43.75 - $60.01
Q2 2017
Shares 182 Value ($000) $9 Avg Close $46.57 Range $37.26 - $55.73