NATUS MEDICAL INC DEL

CUSIP: 639050103 Class: COM

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2018
Shares 3,389 Value ($000) $115 Avg Close — Range —
Q1 2018
Shares 2,021 Value ($000) $68 Avg Close — Range —
Q4 2017
Shares 4,620 Value ($000) $176 Avg Close — Range —
Q3 2016
Shares 3,705 Value ($000) $146 Avg Close — Range —
Q2 2016
Shares 11,731 Value ($000) $443 Avg Close — Range —