ORBITAL ATK INC

CUSIP: 68557N103 Class: COM

VIRGINIA RETIREMENT SYSTEMS ET AL's Holding History (CIK: 0001005354)

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

Q4 2017

Shares 18,900 Value ($000) $2,485 Avg Close — Range —

Q3 2017

Shares 19,500 Value ($000) $2,597 Avg Close — Range —

Q3 2016

Shares 7,300 Value ($000) $556 Avg Close — Range —

Q2 2016

Shares 10,500 Value ($000) $894 Avg Close — Range —

Q4 2015

Shares 9,500 Value ($000) $849 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	18,900	$2,485	—	—
Q3 2017	19,500	$2,597	—	—
Q3 2016	7,300	$556	—	—
Q2 2016	10,500	$894	—	—
Q4 2015	9,500	$849	—	—