XENON PHARMACEUTICALS INC

Ticker: XENE CUSIP: 98420N105 Class: Common Stock

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

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

Q4 2025
Shares 1,226,771 Value ($000) $54,984 Avg Close $42.00 Range $37.23 - $46.60
Q3 2025
Shares 1,206,066 Value ($000) $48,424 Avg Close $35.22 Range $30.00 - $40.35
Q2 2025
Shares 1,152,605 Value ($000) $36,077 Avg Close $32.62 Range $26.74 - $39.01
Q1 2025
Shares 1,391,370 Value ($000) $46,680 Avg Close $37.97 Range $32.70 - $42.23
Q4 2024
Shares 1,157,189 Value ($000) $45,362 Avg Close $41.35 Range $37.34 - $46.00
Q3 2024
Shares 669,600 Value ($000) $26,362 Avg Close $40.32 Range $35.73 - $44.74
Q2 2024
Shares 643,546 Value ($000) $25,092 Avg Close $39.97 Range $35.53 - $44.37
Q1 2024
Shares 347,351 Value ($000) $14,953 Avg Close $46.00 Range $42.08 - $50.99
Q4 2023
Shares 237,495 Value ($000) $10,939 Avg Close $35.33 Range $27.98 - $47.00