IONIS PHARMACEUTICALS INC

Ticker: IONS CUSIP: 462222100 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2025
Shares 3,157 Value ($000) $250 Avg Close $75.30 Range $64.93 - $83.61
Q3 2025
Shares 3,093 Value ($000) $202 Avg Close $48.82 Range $39.72 - $65.55
Q2 2025
Shares 9,561 Value ($000) $378 Avg Close $32.73 Range $23.95 - $40.61