SIMPLEX TRADING, LLC - NATUS MEDICAL INC DEL ownership

NATUS MEDICAL INC DEL's ticker is and the CUSIP is 639050953. A total of 3 filers reported holding NATUS MEDICAL INC DEL in Q3 2015. The put-call ratio across all filers is - and the average weighting 0.0%.

Quarter-by-quarter ownership
SIMPLEX TRADING, LLC ownership history of NATUS MEDICAL INC DEL
ValueSharesWeighting
Q2 2022$507,000
+4970.0%
15,500
+3775.0%
0.00%
Q1 2022$10,000
+11.1%
4000.0%0.00%
Q4 2021$9,000
-95.8%
400
+376.2%
0.00%
Q1 2021$215,000
+795.8%
84
+600.0%
0.00%
Q4 2020$24,000
-89.6%
12
-91.1%
0.00%
Q3 2020$231,000
+725.0%
135
+938.5%
0.00%
Q2 2020$28,000
-99.3%
13
-99.2%
0.00%
-100.0%
Q1 2020$3,740,000
+23275.0%
1,617
+32240.0%
0.01%
Q4 2019$16,000
-20.0%
5
-37.5%
0.00%
Q2 2019$20,000
+900.0%
8
+700.0%
0.00%
Q1 2019$2,000
-99.1%
1
-98.5%
0.00%
-100.0%
Q4 2018$221,000
-8.7%
65
-4.4%
0.00%0.0%
Q3 2018$242,000
+206.3%
68
+195.7%
0.00%
Q2 2018$79,000
+1028.6%
23
+9.5%
0.00%
Q1 2018$7,00021
+5.0%
0.00%
Q4 2017$0
-100.0%
20
+5.3%
0.00%
Q3 2017$1,000
-50.0%
19
-57.8%
0.00%
Q2 2017$2,000
-33.3%
45
+40.6%
0.00%
Q1 2017$3,000
-76.9%
32
-28.9%
0.00%
-100.0%
Q4 2016$13,000
+225.0%
45
+114.3%
0.00%
Q3 2016$4,000
+33.3%
21
-69.6%
0.00%
Q2 2016$3,000
-62.5%
69
+21.1%
0.00%
-100.0%
Q1 2016$8,00057
+5600.0%
0.00%
Q4 2015$0
-100.0%
1
-85.7%
0.00%
Q3 2015$2,0007
+250.0%
0.00%
Q2 2015$0
-100.0%
2
-98.5%
0.00%
Q4 2014$2,0001350.00%
Other shareholders
NATUS MEDICAL INC DEL shareholders Q3 2015
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 19,400$765,0000.01%
Citadel Advisors 4,700$185,0000.00%
SIMPLEX TRADING, LLC 7$2,0000.00%
View complete list of NATUS MEDICAL INC DEL shareholders