COGENT COMM GROUP INC

CUSIP: 19239VAB0 Class: CNV

HighTower Advisors, LLC's Holding History (CIK: 0001462245)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013
Shares 24,000 Value ($000) $25 Avg Close — Range —
Q3 2013
Shares 24,000 Value ($000) $24 Avg Close — Range —
Q2 2013
Shares 24,000 Value ($000) $23 Avg Close — Range —