ORBITAL ATK INC

CUSIP: 68557N103 Class: COM

WATER ISLAND CAPITAL LLC's Holding History (CIK: 0001222765)

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

Q1 2018
Shares 812,144 Value ($000) $107,698 Avg Close — Range —
Q4 2017
Shares 458,098 Value ($000) $60,240 Avg Close — Range —
Q3 2017
Shares 259,894 Value ($000) $34,607 Avg Close — Range —