LIEBHABER RICHARD

Related Filers (4)

Other (1)

144
Tuesday, 1/4/2005
Filing for proposed sale of securities under Rule 144
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Ownership (83)

4
Wednesday, 10/2/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Thursday, 8/22/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 7/2/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/22/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/2/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/12/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Thursday, 1/3/2019
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 10/1/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 7/3/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 6/20/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 4/2/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 2/26/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/2/2018
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 12/6/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 11/8/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 10/2/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Friday, 9/1/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 7/3/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/3/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 2/28/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/3/2017
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/4/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 8/23/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Friday, 7/1/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/18/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 4/4/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 2/1/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/5/2016
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Thursday, 10/1/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 7/1/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 4/1/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/12/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Monday, 3/2/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/14/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Friday, 1/2/2015
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 10/1/2014
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 8/20/2014
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 7/1/2014
COGENT COMMUNICATIONS HOLDINGS, INC.: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/1/2014
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 2/12/2014
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Thursday, 1/2/2014
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 10/1/2013
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Monday, 7/1/2013
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 4/2/2013
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/2/2013
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Monday, 10/1/2012
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Monday, 7/2/2012
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Monday, 4/2/2012
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/3/2012
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/15/2011
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/4/2011
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Friday, 12/3/2010
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/16/2010
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/5/2010
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 11/18/2009
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/17/2009
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 11/16/2009
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 7/13/2009
SOAPSTONE NETWORKS INC.: Statement of changes in beneficial ownership of securities
4
Friday, 1/2/2009
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Friday, 12/19/2008
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/18/2008
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 11/17/2008
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 6/9/2008
SOAPSTONE NETWORKS INC.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/2/2008
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/20/2007
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 11/19/2007
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Wednesday, 6/13/2007
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
4
Thursday, 5/31/2007
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/9/2007
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4
Friday, 12/15/2006
COGENT COMMUNICATIONS GROUP INC: Statement of changes in beneficial ownership of securities
4/A
Tuesday, 11/28/2006
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Friday, 11/17/2006
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Thursday, 5/25/2006
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
3
Friday, 3/24/2006
COGENT COMMUNICATIONS GROUP INC: Initial statement of beneficial ownership of securities
4
Monday, 12/5/2005
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Friday, 5/27/2005
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
4
Wednesday, 11/17/2004
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Wednesday, 7/21/2004
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
4
Friday, 5/28/2004
AVICI SYSTEMS INC: Statement of changes in beneficial ownership of securities
4/A
Friday, 11/7/2003
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Friday, 11/7/2003
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/26/2002
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
4
Monday, 11/4/2002
JDS UNIPHASE CORP /CA/: Statement of changes in beneficial ownership of securities
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