NATUS MEDICAL INC DEL

CUSIP: 639050103 Class: COM

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q1 2016
Shares 172,500 Value ($000) $6,629 Avg Close — Range —
Q4 2015
Shares 177,160 Value ($000) $8,513 Avg Close — Range —