NATUS MEDICAL INC DEL

CUSIP: 639050103 Class: COM

Callahan Advisors, LLC's Holding History (CIK: 0001395055)

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

Q4 2017
Shares 5,935 Value ($000) $227 Avg Close — Range —
Q3 2017
Shares 5,625 Value ($000) $211 Avg Close — Range —
Q2 2017
Shares 8,190 Value ($000) $305 Avg Close — Range —
Q1 2017
Shares 18,120 Value ($000) $711 Avg Close — Range —
Q4 2016
Shares 34,290 Value ($000) $1,193 Avg Close — Range —
Q3 2016
Shares 29,250 Value ($000) $1,149 Avg Close — Range —
Q2 2016
Shares 22,415 Value ($000) $847 Avg Close — Range —
Q1 2016
Shares 18,620 Value ($000) $716 Avg Close — Range —
Q4 2015
Shares 12,860 Value ($000) $618 Avg Close — Range —
Q3 2015
Shares 11,555 Value ($000) $456 Avg Close — Range —