COGENT COMM HOLDINGS INC — institutional ownership

3 funds reported holding COGENT COMM HOLDINGS INC in their latest 13F filings, worth $2.78M in total (CUSIP 19239V952).

Largest holders

1. IMC-Chicago, LLC — $1.99M
2. SIMPLEX TRADING, LLC — $583K
3. GROUP ONE TRADING LLC — $205K