GROUP ONE TRADING, L.P. - HARVARD BIOSCIENCE INC ownership

HARVARD BIOSCIENCE INC's ticker is HBIO and the CUSIP is 416906105. A total of 77 filers reported holding HARVARD BIOSCIENCE INC in Q4 2013. The put-call ratio across all filers is - and the average weighting 0.1%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of HARVARD BIOSCIENCE INC
ValueSharesWeighting
Q4 2021$2,0000.0%3000.0%0.00%
Q3 2021$2,000
-50.0%
300
-70.0%
0.00%
Q3 2015$4,000
-33.3%
1,0000.0%0.00%
Q2 2015$6,000
-94.0%
1,000
-95.3%
0.00%
-100.0%
Q4 2013$100,000
-76.7%
21,212
-74.1%
0.00%
-75.0%
Q3 2013$430,000
+616.7%
81,765
+548.4%
0.01%
+700.0%
Q2 2013$60,00012,6110.00%
Other shareholders
HARVARD BIOSCIENCE INC shareholders Q4 2013
NameSharesValueWeighting ↓
Engine Capital Management, LP 3,542,852$10,536,0004.92%
Fondren Management LP 865,000$2,660,0002.21%
Harvey Partners, LLC 742,500$2,283,0001.65%
BARD ASSOCIATES INC 311,922$959,0000.49%
Adirondack Research & Management Inc. 131,042$403,0000.35%
Granahan Investment Management 1,771,964$5,449,0000.30%
DALTON GREINER HARTMAN MAHER & CO 1,373,518$4,224,0000.29%
HEARTLAND ADVISORS INC 1,000,000$3,075,0000.24%
ESSEX INVESTMENT MANAGEMENT CO LLC 499,616$1,536,0000.22%
Alambic Investment Management, L.P. 43,569$134,0000.10%
View complete list of HARVARD BIOSCIENCE INC shareholders