NATUS MEDICAL INC DEL

CUSIP: 639050103 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q1 2016
Shares 9,700 Value ($000) $373 Avg Close — Range —
Q4 2015
Shares 14,400 Value ($000) $692 Avg Close — Range —
Q3 2015
Shares 14,400 Value ($000) $568 Avg Close — Range —
Q2 2015
Shares 14,600 Value ($000) $621 Avg Close — Range —
Q1 2015
Shares 10,900 Value ($000) $430 Avg Close — Range —