SIMPLEX TRADING, LLC - PROTO LABS INC ownership

PROTO LABS INC's ticker is PRLB and the CUSIP is 743713109. A total of 196 filers reported holding PROTO LABS INC in Q3 2015. The put-call ratio across all filers is 2.43 and the average weighting 0.3%.

Quarter-by-quarter ownership
SIMPLEX TRADING, LLC ownership history of PROTO LABS INC
ValueSharesWeighting
Q2 2022$71,000
-70.7%
1,491
-67.5%
0.00%
Q1 2022$242,000
+868.0%
4,590
+829.1%
0.00%
Q4 2021$25,000
-97.7%
494
-95.8%
0.00%
-100.0%
Q3 2021$1,081,000
+0.7%
11,695
-0.1%
0.00%0.0%
Q2 2021$1,074,000
+31.3%
11,708
+74.1%
0.00%0.0%
Q1 2021$818,000
+570.5%
6,725
+741.7%
0.00%
Q4 2020$122,000
-77.0%
799
-80.5%
0.00%
-100.0%
Q3 2020$531,000
+63.4%
4,106
+41.7%
0.00%0.0%
Q2 2020$325,000
+150.0%
2,897
+68.4%
0.00%
Q1 2020$130,000
+68.8%
1,720
+126.6%
0.00%
Q4 2019$77,000
+60.4%
759
+64.3%
0.00%
Q1 2019$48,000
-76.7%
462
-74.7%
0.00%
-100.0%
Q4 2018$206,000
+21.2%
1,829
+27.3%
0.00%0.0%
Q2 2018$170,000
+97.7%
1,437
-15.0%
0.00%
-75.0%
Q1 2017$86,000
-43.4%
1,691
-33.5%
0.00%
-60.0%
Q3 2016$152,000
+50.5%
2,543
+60.1%
0.01%
+25.0%
Q4 2015$101,000
-34.8%
1,588
-31.4%
0.01%
-27.3%
Q3 2015$155,000
-60.9%
2,314
-60.6%
0.01%
-66.7%
Q2 2015$396,000
+344.9%
5,873
+361.0%
0.03%
+230.0%
Q1 2015$89,0001,2740.01%
Other shareholders
PROTO LABS INC shareholders Q3 2015
NameSharesValueWeighting ↓
Brown Capital Management 3,056,893$372,177,0002.77%
PREMIER ASSET MANAGEMENT LLC 67,800$8,255,0001.47%
Nikko Asset Management Americas, Inc. 1,976,509$240,640,0001.18%
Capital Investment Services of America, Inc. 92,843$11,304,0001.16%
GAGNON SECURITIES LLC 58,485$7,121,0001.08%
DISCIPLINED GROWTH INVESTORS INC /MN 398,710$48,543,0000.98%
BENDER ROBERT & ASSOCIATES 24,260$2,954,0000.95%
ARK Investment Management 3,654,854$444,978,0000.88%
RIVERBRIDGE PARTNERS LLC 625,607$76,168,0000.87%
Pembroke Management, LTD 69,123$8,416,0000.70%
View complete list of PROTO LABS INC shareholders