SpiderRock Trading LLC - NATUS MEDICAL INC DE ownership

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NATUS MEDICAL INC DE's ticker is and the CUSIP is 63905010. A total of 1 filers reported holding NATUS MEDICAL INC DE in Q2 2014. The put-call ratio across all filers is - and the average weighting 0.2%.

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Quarter-by-quarter ownership
SpiderRock Trading LLC ownership history of NATUS MEDICAL INC DE
ValueSharesWeighting
Q3 2014$9,000
-80.9%
300
-84.1%
0.03%
-84.9%
Q2 2014$47,000
+161.1%
1,884
-35.7%
0.20%
+122.8%
Q1 2014$18,000
+50.0%
2,930
-30.2%
0.09%
+39.4%
Q4 2013$12,000–4,200
+320.0%
0.07%–
Q3 2013$0–1,0000.0%0.00%–
Q2 2013$0–1,000–0.00%–
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Other shareholders
NATUS MEDICAL INC DE shareholders Q2 2014
NameSharesValueWeighting ↓
SpiderRock Trading LLC 1,884$47,0000.20%
View complete list of NATUS MEDICAL INC DE shareholders