PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

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

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

Q1 2018
Shares 309,819 Value ($000) $11,373 Avg Close $36.37 Range $27.19 - $46.14
Q4 2017
Shares 680,659 Value ($000) $25,518 Avg Close $50.91 Range $34.85 - $64.96
Q3 2017
Shares 623,489 Value ($000) $40,383 Avg Close $61.26 Range $52.91 - $70.00
Q2 2017
Shares 684,160 Value ($000) $37,027 Avg Close $53.29 Range $48.23 - $59.10
Q1 2017
Shares 239,194 Value ($000) $13,345 Avg Close $52.54 Range $45.13 - $63.14
Q4 2016
Shares 328,275 Value ($000) $16,148 Avg Close $55.18 Range $40.58 - $68.18
Q3 2016
Shares 277,150 Value ($000) $16,621 Avg Close $53.65 Range $35.04 - $64.50
Q2 2016
Shares 237,880 Value ($000) $8,316 Avg Close $43.55 Range $33.53 - $51.45
Q1 2016
Shares 45,830 Value ($000) $1,886 Avg Close $39.14 Range $28.20 - $67.32
Q4 2015
Shares 45,830 Value ($000) $3,121 Avg Close $60.32 Range $40.47 - $76.42
Q3 2015
Shares 987,979 Value ($000) $44,795 Avg Close $58.24 Range $42.20 - $70.52
Q2 2015
Shares 1,392,850 Value ($000) $73,361 Avg Close $39.47 Range $30.14 - $55.97
Q1 2015
Shares 1,734,928 Value ($000) $66,170 Avg Close $25.65 Range $18.76 - $45.00
Q4 2014
Shares 1,078,550 Value ($000) $22,391 Avg Close $20.87 Range $17.00 - $24.67
Q3 2014
Shares 1,158,395 Value ($000) $25,670 Avg Close $21.20 Range $16.71 - $24.31
Q2 2014
Shares 1,061,820 Value ($000) $23,944 Avg Close $25.01 Range $18.52 - $41.33
Q1 2014
Shares 512,930 Value ($000) $19,650 Avg Close $32.24 Range $24.42 - $49.24
Q4 2013
Shares 939,780 Value ($000) $24,923 Avg Close $25.08 Range $18.93 - $30.55