MERCURY SYS INC

Ticker: MRCY CUSIP: 589378108 Class: Common Stock

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

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

Q1 2018

Shares 520,135 Value ($000) $25,133 Avg Close $47.69 Range $41.64 - $52.59

Q4 2017

Shares 482,915 Value ($000) $24,798 Avg Close $51.31 Range $47.69 - $55.00

Q3 2017

Shares 280,955 Value ($000) $14,576 Avg Close $46.11 Range $39.96 - $52.00

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	520,135	$25,133	$47.69	$41.64 - $52.59
Q4 2017	482,915	$24,798	$51.31	$47.69 - $55.00
Q3 2017	280,955	$14,576	$46.11	$39.96 - $52.00