COGENT COMMUNICATIONS HLDGS

Ticker: CCOI CUSIP: 19239V302 Class: Common Stock

Magnetar Financial LLC's Holding History (CIK: 0001352851)

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

Q4 2015

Shares 12,943 Value ($000) $449 Avg Close $19.64 Range $15.90 - $22.21

Q3 2015

Shares 14,298 Value ($000) $388 Avg Close $17.72 Range $15.62 - $20.44

Q2 2015

Shares 14,754 Value ($000) $499 Avg Close $19.88 Range $18.21 - $21.34

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	12,943	$449	$19.64	$15.90 - $22.21
Q3 2015	14,298	$388	$17.72	$15.62 - $20.44
Q2 2015	14,754	$499	$19.88	$18.21 - $21.34