SCHLEIFER MARK A

VP of IP Engineering at COGENT COMMUNICATIONS HOLDINGS, INC. · on record since Mar 21, 2006

Insider trading activity of SCHLEIFER MARK A

Transactions on record: 88; since Oct 10, 2003

Open-market buys: 0

Open-market sells: 37; $1.3M

Companies traded: 1; last filing Dec 5, 2011

Figures computed from official regulatory filings — .

Companies where SCHLEIFER MARK A has traded

COGENT COMMUNICATIONS HOLDINGS, INC.88 tx · $1.4M · Dec 5, 2011

Track record of SCHLEIFER MARK A

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of SCHLEIFER MARK A

Co-insiders of SCHLEIFER MARK A

BACHMANN STEPHEN JCOGENT COMMUNICATIONS HOLDINGS, INC.
Bath BlakeCOGENT COMMUNICATIONS HOLDINGS, INC.
BCI HOLDINGS LPCOGENT COMMUNICATIONS HOLDINGS, INC.
BERTRAND JEAN JACQUESCOGENT COMMUNICATIONS HOLDINGS, INC.
BEURY ROBERT N JRCOGENT COMMUNICATIONS HOLDINGS, INC.
BNP EUROPE TE LECOM & MEDIA FUND II LPCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADVIEW BCPSBS FUND LPCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADVIEW CAPITAL PARTNERS AFFILIATES FUND LLCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADVIEW CAPITAL PARTNERS LPCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADVIEW CAPITAL PARTNERS MANAGEMENT LLCCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADVIEW CAPITAL PARTNERS QUALIFIED PURCHASER FUND LPCOGENT COMMUNICATIONS HOLDINGS, INC.
BROADWVIEW HOLDING LLPCOGENT COMMUNICATIONS HOLDINGS, INC.
BROOKS STEVEN DCOGENT COMMUNICATIONS HOLDINGS, INC.
BUBECK JAMESCOGENT COMMUNICATIONS HOLDINGS, INC.
CARUS MICHAELCOGENT COMMUNICATIONS HOLDINGS, INC.
Chang John B.COGENT COMMUNICATIONS HOLDINGS, INC.
Cisco Systems Capital CORPCOGENT COMMUNICATIONS HOLDINGS, INC.
CISCO SYSTEMS INCCOGENT COMMUNICATIONS HOLDINGS, INC.
Danielson Jeffrey SCOGENT COMMUNICATIONS HOLDINGS, INC.
DENINGER PAUL FCOGENT COMMUNICATIONS HOLDINGS, INC.
de Sa PaulCOGENT COMMUNICATIONS HOLDINGS, INC.
FERGUSON Lewis HCOGENT COMMUNICATIONS HOLDINGS, INC.
General Business Finance & Investments, Ltd.COGENT COMMUNICATIONS HOLDINGS, INC.
GLASSMEYER EDWARD FCOGENT COMMUNICATIONS HOLDINGS, INC.
Harris Mark AndrewCOGENT COMMUNICATIONS HOLDINGS, INC.
Harrison R ReedCOGENT COMMUNICATIONS HOLDINGS, INC.
Howard Eve NCOGENT COMMUNICATIONS HOLDINGS, INC.
Howell Deneen CCOGENT COMMUNICATIONS HOLDINGS, INC.
JERUSALEM PARTNERS III LPCOGENT COMMUNICATIONS HOLDINGS, INC.
JERUSALEM PARTNERS IV LPCOGENT COMMUNICATIONS HOLDINGS, INC.
JERUSALEM PARTNERS IV - VENTURE CAPITAL LPCOGENT COMMUNICATIONS HOLDINGS, INC.
JERUSALEM VENTURE PARTNERS CORPCOGENT COMMUNICATIONS HOLDINGS, INC.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Other	-33,650	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Sell	-3,125	16.58 USD	$51.8K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Exercise	3,125	4.88 USD	$15.3K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	ExerciseD (derivative)	-3,125	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 17, 2011	Sell	-3,000	14.90 USD	$44.7K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 3, 2011	Sell	-1,250	13.27 USD	$16.6K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 15, 2011	Sell	-3,000	16.69 USD	$50.1K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 1, 2011	Sell	-1,250	16.83 USD	$21K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 18, 2011	Other	-2,160	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 18, 2011	Sell	-17,040	12.92 USD	$220.2K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 4, 2011	Sell	-1,250	14.32 USD	$17.9K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jan 5, 2011	Sell	-1,250	14.24 USD	$17.8K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 13, 2010	Sell	-1,250	10.00 USD	$12.5K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 12, 2010	Sell	-1,250	10.00 USD	$12.5K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 16, 2010	Award	57,600	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 1, 2010	Sell	-1,250	10.43	$13K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Mar 4, 2010	Sell	-1,250	10.52	$13.2K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 13, 2009	Sell	-10,000	12.46	$124.6K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 2, 2009	Award	-1,250	11.11	$13.9K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 1, 2009	Sell	-1,250	8.22	$10.3K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	May 1, 2009	Sell	-20,000	8.63	$172.6K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 2, 2009	Sell	-1,250	8.21	$10.3K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jan 5, 2009	Sell	-5,000	6.48	$32.4K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jun 23, 2008	Exercise	599	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jun 23, 2008	Sell	-599	14.89	$8.9K		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Other	-33,650	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Sell	-3,125	16.58 USD	$51.8K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	Exercise	3,125	4.88 USD	$15.3K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Dec 5, 2011	ExerciseD (derivative)	-3,125	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 17, 2011	Sell	-3,000	14.90 USD	$44.7K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 3, 2011	Sell	-1,250	13.27 USD	$16.6K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 15, 2011	Sell	-3,000	16.69 USD	$50.1K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 1, 2011	Sell	-1,250	16.83 USD	$21K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 18, 2011	Other	-2,160	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 18, 2011	Sell	-17,040	12.92 USD	$220.2K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 4, 2011	Sell	-1,250	14.32 USD	$17.9K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jan 5, 2011	Sell	-1,250	14.24 USD	$17.8K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 13, 2010	Sell	-1,250	10.00 USD	$12.5K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 12, 2010	Sell	-1,250	10.00 USD	$12.5K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 16, 2010	Award	57,600	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 1, 2010	Sell	-1,250	10.43	$13K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Mar 4, 2010	Sell	-1,250	10.52	$13.2K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 13, 2009	Sell	-10,000	12.46	$124.6K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Oct 2, 2009	Award	-1,250	11.11	$13.9K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jul 1, 2009	Sell	-1,250	8.22	$10.3K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	May 1, 2009	Sell	-20,000	8.63	$172.6K	Unusual size	SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Apr 2, 2009	Sell	-1,250	8.21	$10.3K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jan 5, 2009	Sell	-5,000	6.48	$32.4K		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jun 23, 2008	Exercise	599	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COGENT COMMUNICATIONS HOLDINGS, INC.Listing on record	Jun 23, 2008	Sell	-599	14.89	$8.9K		SEC