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CCOI US​

Cogent Communications Holdings, Inc.(CCOI US)

$7.48+0.182.47%Ext:$8.85+1.3718.34%(Market Closed · 23:55:14 UTC)

Overview

ProfileEntity Structure

Documents

SEC Filings
CategorizedChronologicalBy Owner

Financials & Metrics

FinancialsChartingShort InterestEmployees

SEC Filings by Owner

Insider Ownership

BEURY ROBERT N JR(179)

  • 4Statement of changes in beneficial ownership1 May 2019
  • 4Statement of changes in beneficial ownership4 Mar 2019
  • 4Statement of changes in beneficial ownership4 Dec 2018
  • 4Statement of changes in beneficial ownership13 Sep 2018
  • 4Statement of changes in beneficial ownership12 Sep 2018
  • 4Statement of changes in beneficial ownership4 Sep 2018
  • 4Statement of changes in beneficial ownership1 Jun 2018
  • 4Statement of changes in beneficial ownership1 Mar 2018
  • 4Statement of changes in beneficial ownership22 Feb 2018
  • 4Statement of changes in beneficial ownership1 Dec 2017

WEED THADDEUS GERARD(166)

  • 4Statement of changes in beneficial ownership3 Sep
  • 4Statement of changes in beneficial ownership16 Jun
  • 4Statement of changes in beneficial ownership5 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership12 Dec 2025
  • 4Statement of changes in beneficial ownership3 Dec 2025
  • 4Statement of changes in beneficial ownership2 Sep 2025
  • 4Statement of changes in beneficial ownership9 Jun 2025
  • 4Statement of changes in beneficial ownership29 May 2025
  • 4Statement of changes in beneficial ownership16 May 2025

ONEILL TIMOTHY G(158)

  • 4Statement of changes in beneficial ownership3 Jun 2021
  • 4Statement of changes in beneficial ownership15 Mar 2021
  • 4Statement of changes in beneficial ownership5 Mar 2021
  • 4Statement of changes in beneficial ownership25 Feb 2021
  • 4Statement of changes in beneficial ownership7 Dec 2020
  • 4Statement of changes in beneficial ownership2 Dec 2020
  • 4Statement of changes in beneficial ownership15 Sep 2020
  • 4Statement of changes in beneficial ownership8 Sep 2020
  • 4Statement of changes in beneficial ownership17 Jun 2020
  • 4Statement of changes in beneficial ownership8 Jun 2020

KUMMER RAYMOND B(125)

  • 4Statement of changes in beneficial ownership4 Jan 2023
  • 4Statement of changes in beneficial ownership1 Dec 2022
  • 4Statement of changes in beneficial ownership17 Nov 2022
  • 4Statement of changes in beneficial ownership5 Jan 2022
  • 4Statement of changes in beneficial ownership1 Dec 2021
  • 4Statement of changes in beneficial ownership3 Aug 2021
  • 4Statement of changes in beneficial ownership19 Jul 2021
  • 4Statement of changes in beneficial ownership2 Jul 2021
  • 4Statement of changes in beneficial ownership7 Jun 2021
  • 4Statement of changes in beneficial ownership25 Feb 2021

KILMER HENRY W(98)

  • 4Statement of changes in beneficial ownership15 Sep
  • 4Statement of changes in beneficial ownership15 Jun
  • 4Statement of changes in beneficial ownership9 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership8 Dec 2025
  • 4Statement of changes in beneficial ownership2 Dec 2025
  • 4Statement of changes in beneficial ownership5 Sep 2025
  • 4Statement of changes in beneficial ownership9 Jun 2025
  • 4Statement of changes in beneficial ownership10 Mar 2025
  • 4Statement of changes in beneficial ownership13 Jan 2025

SCHAEFFER DAVE(94)

  • 4Statement of changes in beneficial ownership4 May
  • 4Statement of changes in beneficial ownership2 Apr
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership11 Aug 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025
  • 4Statement of changes in beneficial ownership16 Jun 2025
  • 4Statement of changes in beneficial ownership16 Jun 2025
  • 4Statement of changes in beneficial ownership12 Jun 2025
  • 4Statement of changes in beneficial ownership12 Jun 2025
  • 4Statement of changes in beneficial ownership10 Jun 2025

BROOKS STEVEN D(90)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership1 Jul
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership1 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership31 Mar 2025
  • 4Statement of changes in beneficial ownership22 Jan 2025
  • 4Statement of changes in beneficial ownership3 Jan 2025
  • 4Statement of changes in beneficial ownership1 Oct 2024

Montagner Marc(75)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership30 Jun
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership1 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership31 Mar 2025
  • 4Statement of changes in beneficial ownership2 Jan 2025
  • 4Statement of changes in beneficial ownership2 Oct 2024
  • 4Statement of changes in beneficial ownership1 Jul 2024

Bath Blake(73)

  • 4Statement of changes in beneficial ownership31 Mar 2025
  • 4Statement of changes in beneficial ownership2 Jan 2025
  • 4Statement of changes in beneficial ownership21 Nov 2024
  • 4Statement of changes in beneficial ownership1 Oct 2024
  • 4Statement of changes in beneficial ownership2 Jul 2024
  • 4Statement of changes in beneficial ownership1 Apr 2024
  • 4Statement of changes in beneficial ownership3 Jan 2024
  • 4Statement of changes in beneficial ownership21 Nov 2023
  • 4Statement of changes in beneficial ownership17 Nov 2023
  • 4Statement of changes in beneficial ownership17 Nov 2023

Karnes Jeffrey(71)

  • 4Statement of changes in beneficial ownership2 May 2013
  • 4Statement of changes in beneficial ownership18 Apr 2013
  • 4Statement of changes in beneficial ownership14 Mar 2013
  • 4Statement of changes in beneficial ownership8 Mar 2013
  • 4Statement of changes in beneficial ownership16 Jan 2013
  • 4Statement of changes in beneficial ownership11 Dec 2012
  • 4Statement of changes in beneficial ownership20 Nov 2012
  • 4Statement of changes in beneficial ownership15 Oct 2012
  • 4Statement of changes in beneficial ownership14 Aug 2012
  • 4Statement of changes in beneficial ownership17 Jul 2012

FERGUSON Lewis H(66)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership30 Jun
  • 4Statement of changes in beneficial ownership28 May
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership2 Dec 2025
  • 4Statement of changes in beneficial ownership2 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership29 May 2025

WEINGARTEN TIM(63)

  • 4Statement of changes in beneficial ownership3 Oct 2019
  • 4Statement of changes in beneficial ownership1 Jul 2019
  • 4Statement of changes in beneficial ownership2 Apr 2019
  • 4Statement of changes in beneficial ownership3 Jan 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership1 Oct 2018
  • 4Statement of changes in beneficial ownership3 Jul 2018
  • 4Statement of changes in beneficial ownership2 Apr 2018
  • 4Statement of changes in beneficial ownership16 Mar 2018
  • 4Statement of changes in beneficial ownership3 Jan 2018

BUBECK JAMES(59)

  • 4Statement of changes in beneficial ownership6 Jun 2025
  • 4Statement of changes in beneficial ownership5 Mar 2025
  • 4Statement of changes in beneficial ownership13 Jan 2025
  • 4Statement of changes in beneficial ownership10 Dec 2024
  • 4Statement of changes in beneficial ownership3 Dec 2024
  • 4Statement of changes in beneficial ownership5 Sep 2024
  • 4Statement of changes in beneficial ownership4 Jun 2024
  • 4Statement of changes in beneficial ownership4 Mar 2024
  • 4Statement of changes in beneficial ownership5 Jan 2024
  • 4Statement of changes in beneficial ownership6 Dec 2023

LIEBHABER RICHARD(57)

  • 4Statement of changes in beneficial ownership2 Oct 2019
  • 4Statement of changes in beneficial ownership22 Aug 2019
  • 4Statement of changes in beneficial ownership2 Jul 2019
  • 4Statement of changes in beneficial ownership22 May 2019
  • 4Statement of changes in beneficial ownership2 Apr 2019
  • 4Statement of changes in beneficial ownership12 Mar 2019
  • 4Statement of changes in beneficial ownership3 Jan 2019
  • 4Statement of changes in beneficial ownership1 Oct 2018
  • 4Statement of changes in beneficial ownership3 Jul 2018
  • 4Statement of changes in beneficial ownership20 Jun 2018

Kennedy Sheryl Lynn(53)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership30 Jun
  • 4Statement of changes in beneficial ownership18 May
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership12 Nov 2025
  • 4Statement of changes in beneficial ownership1 Oct 2025
  • 4Statement of changes in beneficial ownership21 Aug 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025

Chang John B.(51)

  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership2 Dec 2025
  • 4Statement of changes in beneficial ownership3 Jun 2025
  • 4Statement of changes in beneficial ownership15 May 2025
  • 4Statement of changes in beneficial ownership11 Apr 2025
  • 4Statement of changes in beneficial ownership12 Mar 2025
  • 4Statement of changes in beneficial ownership7 Mar 2025
  • 4Statement of changes in beneficial ownership13 Jan 2025
  • 4Statement of changes in beneficial ownership19 Dec 2024
  • 4Statement of changes in beneficial ownership6 Dec 2024

SCHLEIFER MARK A(42)

  • 4Statement of changes in beneficial ownership5 Dec 2011
  • 4Statement of changes in beneficial ownership17 Oct 2011
  • 4Statement of changes in beneficial ownership3 Oct 2011
  • 4Statement of changes in beneficial ownership15 Jul 2011
  • 4Statement of changes in beneficial ownership1 Jul 2011
  • 4Statement of changes in beneficial ownership18 Apr 2011
  • 4Statement of changes in beneficial ownership4 Apr 2011
  • 4Statement of changes in beneficial ownership5 Jan 2011
  • 4Statement of changes in beneficial ownership13 Oct 2010
  • 4Statement of changes in beneficial ownership12 Oct 2010

MARGALIT EREL N(37)

  • 4Statement of changes in beneficial ownership3 Jul 2013
  • 4Statement of changes in beneficial ownership14 Jun 2013
  • 4Statement of changes in beneficial ownership3 Apr 2013
  • 4Statement of changes in beneficial ownership28 Feb 2013
  • 4Statement of changes in beneficial ownership3 Jan 2013
  • 4Statement of changes in beneficial ownership2 Oct 2012
  • 4Statement of changes in beneficial ownership2 Jul 2012
  • 4Statement of changes in beneficial ownership2 Apr 2012
  • 4Statement of changes in beneficial ownership3 Jan 2012
  • 4Statement of changes in beneficial ownership19 Dec 2011

Harrison R Reed(27)

  • 4Statement of changes in beneficial ownership10 Sep 2009
  • 4Statement of changes in beneficial ownership7 Aug 2009
  • 4Statement of changes in beneficial ownership29 Aug 2007
  • 4Statement of changes in beneficial ownership21 Aug 2007
  • 4Statement of changes in beneficial ownership20 Jul 2007
  • 4Statement of changes in beneficial ownership15 Jun 2007
  • 4Statement of changes in beneficial ownership1 Jun 2007
  • 4Statement of changes in beneficial ownership15 May 2007
  • 4Statement of changes in beneficial ownership1 May 2007
  • 4Statement of changes in beneficial ownership18 Apr 2007

De Sa Paul(20)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership1 Jul
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership2 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership31 Mar 2025
  • 4Statement of changes in beneficial ownership3 Jan 2025
  • 4Statement of changes in beneficial ownership2 Oct 2024
  • 4Statement of changes in beneficial ownership1 Jul 2024

Howell Deneen C(19)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership1 Jul
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership1 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership1 Apr 2025
  • 4Statement of changes in beneficial ownership2 Jan 2025
  • 4Statement of changes in beneficial ownership2 Oct 2024
  • 4Statement of changes in beneficial ownership2 Jul 2024

Howard Eve N(19)

  • 4Statement of changes in beneficial ownership30 Sep
  • 4Statement of changes in beneficial ownership1 Jul
  • 4Statement of changes in beneficial ownership31 Mar
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership1 Oct 2025
  • 4Statement of changes in beneficial ownership1 Jul 2025
  • 4Statement of changes in beneficial ownership31 Mar 2025
  • 4Statement of changes in beneficial ownership2 Jan 2025
  • 4Statement of changes in beneficial ownership14 Nov 2024
  • 4Statement of changes in beneficial ownership2 Oct 2024

GLASSMEYER EDWARD F(12)

  • 4PRIMARY DOCUMENT10 Jan 2007
  • 4PRIMARY DOCUMENT15 Dec 2006
  • 4PRIMARY DOCUMENT11 Dec 2006
  • 4PRIMARY DOCUMENT15 Nov 2006
  • 4PRIMARY DOCUMENT5 Sep 2006
  • 4PRIMARY DOCUMENT8 Jun 2006
  • 4PRIMARY DOCUMENT2 Feb 2006
  • 4PRIMARY DOCUMENT16 Feb 2005
  • 4PRIMARY DOCUMENT10 Nov 2004
  • 4PRIMARY DOCUMENT31 Mar 2004

KATZ CAROLYN(11)

  • 4Statement of changes in beneficial ownership1 Oct 2021
  • 4Statement of changes in beneficial ownership2 Jul 2021
  • 4Statement of changes in beneficial ownership2 Jul 2021
  • 4Statement of changes in beneficial ownership1 Apr 2021
  • 4Statement of changes in beneficial ownership4 Jan 2021
  • 4Statement of changes in beneficial ownership1 Oct 2020
  • 4Statement of changes in beneficial ownership1 Jul 2020
  • 4Statement of changes in beneficial ownership1 Apr 2020
  • 4Statement of changes in beneficial ownership2 Jan 2020
  • 3Initial statement of beneficial ownership7 Nov 2019

BERTRAND JEAN JACQUES(9)

  • 4Statement of changes in beneficial ownership27 Mar 2007
  • 4Statement of changes in beneficial ownership10 Jan 2007
  • 4Statement of changes in beneficial ownership17 Nov 2006
  • 4Statement of changes in beneficial ownership9 Jun 2006
  • 4Statement of changes in beneficial ownership2 Feb 2006
  • 4Statement of changes in beneficial ownership18 Feb 2005
  • 4Statement of changes in beneficial ownership8 Nov 2004
  • 3Initial statement of beneficial ownership9 Apr 2004
  • 3/AInitial statement of beneficial ownership (amendment)5 Aug 2004

Wallace Sean Robert(9)

  • 4Statement of changes in beneficial ownership3 Mar 2022
  • 4Statement of changes in beneficial ownership5 Jan 2022
  • 4Statement of changes in beneficial ownership3 Dec 2021
  • 4Statement of changes in beneficial ownership18 Nov 2021
  • 4Statement of changes in beneficial ownership8 Sep 2021
  • 4Statement of changes in beneficial ownership14 Jun 2021
  • 4Statement of changes in beneficial ownership25 Feb 2021
  • 3Initial statement of beneficial ownership11 May 2020
  • 4Statement of changes in beneficial ownership11 May 2020

BNP EUROPE TE LECOM & MEDIA FUND II LP(8)

  • 4Statement of changes in beneficial ownership27 Mar 2007
  • 4Statement of changes in beneficial ownership10 Jan 2007
  • 4Statement of changes in beneficial ownership17 Nov 2006
  • 4Statement of changes in beneficial ownership9 Jun 2006
  • 4Statement of changes in beneficial ownership2 Feb 2006
  • 4Statement of changes in beneficial ownership18 Feb 2005
  • 4Statement of changes in beneficial ownership8 Nov 2004
  • 3/AInitial statement of beneficial ownership (amendment)5 Aug 2004

General Business Finance & Investments, Ltd.(8)

  • 4Statement of changes in beneficial ownership27 Mar 2007
  • 4Statement of changes in beneficial ownership10 Jan 2007
  • 4Statement of changes in beneficial ownership17 Nov 2006
  • 4Statement of changes in beneficial ownership9 Jun 2006
  • 4Statement of changes in beneficial ownership2 Feb 2006
  • 4Statement of changes in beneficial ownership18 Feb 2005
  • 4Statement of changes in beneficial ownership8 Nov 2004
  • 3/AInitial statement of beneficial ownership (amendment)5 Aug 2004

OAK INVESTMENT PARTNERS IX L P(7)

  • 4PRIMARY DOCUMENT8 Jun 2006
  • 4PRIMARY DOCUMENT2 Feb 2006
  • 4PRIMARY DOCUMENT16 Feb 2005
  • 4PRIMARY DOCUMENT10 Nov 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT1 Aug 2003

OAK IX AFFILIATES FUND A LP(7)

  • 4PRIMARY DOCUMENT8 Jun 2006
  • 4PRIMARY DOCUMENT2 Feb 2006
  • 4PRIMARY DOCUMENT16 Feb 2005
  • 4PRIMARY DOCUMENT10 Nov 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT1 Aug 2003

OAK IX AFFILIATES FUND LP(7)

  • 4PRIMARY DOCUMENT8 Jun 2006
  • 4PRIMARY DOCUMENT2 Feb 2006
  • 4PRIMARY DOCUMENT16 Feb 2005
  • 4PRIMARY DOCUMENT10 Nov 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT1 Aug 2003

WEI JAMES(7)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (WV IV)16 Feb 2005
  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (WV III)16 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK10 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK1 Apr 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003
  • 3Initial statement of beneficial ownership2 Apr 2002

PETERSON KENNETH D JR(7)

  • 4PRIMARY DOCUMENT23 Mar 2007
  • 4PRIMARY DOCUMENT9 Jan 2007
  • 4PRIMARY DOCUMENT14 Nov 2006
  • 4PRIMARY DOCUMENT20 Jun 2006
  • 4PRIMARY DOCUMENT1 Feb 2006
  • 4PRIMARY DOCUMENT17 Feb 2005
  • 3PRIMARY DOCUMENT5 Nov 2004

Ortega Ernest(7)

  • 4Statement of changes in beneficial ownership17 Sep 2015
  • 4Statement of changes in beneficial ownership3 Jun 2015
  • 4Statement of changes in beneficial ownership13 Mar 2015
  • 4Statement of changes in beneficial ownership21 Nov 2014
  • 4Statement of changes in beneficial ownership4 Nov 2014
  • 4Statement of changes in beneficial ownership2 Sep 2014
  • 3Initial statement of beneficial ownership1 Aug 2013

BCP CAPITAL, L.P.(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BCP CAPITAL QPF, L.P.(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

WORLDVIEW TECHNOLOGY PARTNERS IV LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (WV IV)16 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK10 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK1 Apr 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

DENINGER PAUL F(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

JERUSALEM VENTURE PARTNERS IV LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JVP CORP IV(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS ENTREPRENEURS FUND IV LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM PARTNERS IV - VENTURE CAPITAL LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS IV ISRAEL LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS IV A LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM PARTNERS IV LP(5)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP IV)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP IV)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP IV)31 Mar 2004
  • 4ACQUISITION OF SERIES I PREFERRED STOCK21 Jan 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

BCP GENERAL LLC(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BCP AFFILIATES FUND LLC(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BACHMANN STEPHEN J(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BV HOLDINGS LLP(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BCI HOLDINGS LP(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

BROADVIEW BCPSBS FUND LP(5)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership6 Dec 2004
  • 4PRIMARY DOCUMENT31 Mar 2004
  • 4PRIMARY DOCUMENT21 Jan 2004
  • 4PRIMARY DOCUMENT13 Aug 2003

JERUSALEM VENTURE PARTNERS CORP(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS III LP(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS ENTREPRENEUR FUND III LP(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS III ISRAEL LP(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM VENTURE PARTNERS III ISRAEL MANAGEMENT CO LTD(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

JERUSALEM PARTNERS III LP(4)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (JVP III)17 Feb 2005
  • 4ACQUISITION OF SERIES M PREFERRED STOCK (JVP III)2 Dec 2004
  • 4ACQUISITION OF SERIES J PREFERRED STOCK (JVP III)31 Mar 2004
  • 4Statement of changes in beneficial ownership5 Aug 2003

Thrasher Warren(4)

  • 4Statement of changes in beneficial ownership28 Oct 2005
  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership10 Sep 2004
  • 3Initial statement of beneficial ownership11 Aug 2004

Kapp David Allen(4)

  • 4Statement of changes in beneficial ownership14 Aug 2023
  • 4Statement of changes in beneficial ownership5 Jan 2023
  • 4Statement of changes in beneficial ownership28 Nov 2022
  • 3Initial statement of beneficial ownership1 Sep 2022

CISCO SYSTEMS INC(3)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 3Initial statement of beneficial ownership17 Feb 2005

LEE HELEN HEYOUNG(3)

  • 4Statement of changes in beneficial ownership14 Oct 2003
  • 4Statement of changes in beneficial ownership4 Aug 2003
  • 3Initial statement of beneficial ownership13 Mar 2002

WAGNER BRUCE THOMAS(3)

  • 4Statement of changes in beneficial ownership19 Feb 2004
  • 4Statement of changes in beneficial ownership10 Oct 2003
  • 3Initial statement of beneficial ownership13 Jun 2002

Cisco Systems Capital CORP(3)

  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 4Statement of changes in beneficial ownership17 Feb 2005
  • 3Initial statement of beneficial ownership17 Feb 2005

Harris Mark Andrew(3)

  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership3 Sep 2025
  • 3Initial statement of beneficial ownership3 Sep 2025

OAK MANAGEMENT CORP(2)

  • 4PRIMARY DOCUMENT8 Jun 2006
  • 4PRIMARY DOCUMENT2 Feb 2006

WORLDVIEW TECHNOLOGY PARTNERS III LP(2)

  • 4CONVERSION OF PREFERRED STOCK TO COMMON STOCK (WV III)16 Feb 2005
  • 4Statement of changes in beneficial ownership5 Aug 2003

O'Connor Greg W(2)

  • 4Statement of changes in beneficial ownership3 May 2023
  • 3Initial statement of beneficial ownership3 May 2023

D ROZARIO NEALE(1)

  • 3Initial statement of beneficial ownership13 Mar 2002

STEWART STEVEN SCOTT(1)

  • 3Initial statement of beneficial ownership13 Mar 2002

MORRIS BARRY(1)

  • 3Initial statement of beneficial ownership13 Mar 2002

CURRER WILLIAM R(1)

  • 3Initial statement of beneficial ownership13 Mar 2002

NAS PARTNERS I LLC(1)

  • 3Initial statement of beneficial ownership2 Apr 2002

NASSAU CAPITAL PARTNERS IV LP(1)

  • 3Initial statement of beneficial ownership2 Apr 2002

BOULDER VENTURES III ANNEX LP(1)

  • 3Initial statement of beneficial ownership9 Apr 2002

BOULDER VENTURES III LP(1)

  • 3Initial statement of beneficial ownership9 Apr 2002

CARUS MICHAEL(1)

  • 3Initial statement of beneficial ownership30 Oct 2003

Slagmuylder Jean-Michel F.F.(1)

  • 3Initial statement of beneficial ownership19 Mar 2020

Danielson Jeffrey S(1)

  • 3Initial statement of beneficial ownership2 Aug 2023

≥5% Ownership

FMR LLC(20)

  • SC 13G/ACogent Communications Holdings, Inc.13 Feb 2018
  • SC 13G/ACogent Communications Holdings, Inc.14 Feb 2017
  • SC 13G/ACogent Communications Holdings, Inc.12 Feb 2016
  • SC 13G/ACogent Communications Holdings, Inc.10 Jul 2015
  • SC 13GCogent Communications Holdings, Inc.13 Feb 2015
  • SC 13G/ACogent Communications Group Inc14 Feb 2014
  • SC 13G/ACogent Communications Group Inc14 Feb 2013
  • SC 13G/ACogent Communications Group Inc14 Feb 2012
  • SC 13G/ACogent Communications Group Inc11 Jul 2011
  • SC 13G/ACogent Communications Group Inc14 Feb 2011

VANGUARD GROUP INC(18)

  • SC 13G/ACogent Communications Holdings, Inc.26 Mar
  • SC 13G/ACogent Communications Holdings, Inc.13 Feb 2024
  • SC 13G/ACogent Communications Holdings, Inc.9 Feb 2023
  • SC 13G/ACogent Communications Holdings, Inc.9 Feb 2022
  • SC 13G/ACogent Communications Holdings, Inc.10 May 2021
  • SC 13G/ACogent Communications Holdings, Inc.10 Feb 2021
  • SC 13G/ACogent Communications Holdings, Inc.12 Feb 2020
  • SC 13G/ACogent Communications Holdings, Inc.10 May 2019
  • SC 13G/ACogent Communications Holdings, Inc.11 Feb 2019
  • SC 13G/ACogent Communications Holdings, Inc.12 Mar 2018

BlackRock Inc.(18)

  • SC 13G/ACogent Communications Holdings, Inc.22 Jan 2024
  • SC 13G/ACogent Communications Holdings, Inc.30 Jan 2023
  • SC 13G/ACogent Communications Holdings, Inc.27 Jan 2022
  • SC 13G/ACogent Communications Holdings, Inc.25 Jan 2022
  • SC 13G/ACogent Communications Holdings, Inc.26 Jan 2021
  • SC 13G/ACogent Communications Holdings, Inc.4 Feb 2020
  • SC 13G/ACogent Communications Holdings, Inc.24 Jan 2019
  • SC 13G/ACogent Communications Holdings, Inc.19 Jan 2018
  • SC 13G/ACogent Communications Holdings, Inc.12 Jan 2017
  • SC 13G/ACogent Communications Holdings, Inc.10 May 2016

COLUMBIA WANGER ASSET MANAGEMENT LLC(11)

  • SC 13G/ACogent Communications Holdings, Inc.5 Oct 2015
  • SC 13G/ACogent Communications Holdings, Inc.11 Feb 2015
  • SC 13G/ACogent Communications Group Inc14 Feb 2013
  • SC 13G/ACogent Communications Group Inc10 Feb 2012
  • SC 13G/ACogent Communications Group Inc10 Feb 2011
  • SC 13G/ACogent Communications Group Inc8 Dec 2010
  • SC 13G/ACogent Communications Group Inc9 Feb 2010
  • SC 13G/ACogent Communications Group Inc9 Mar 2009
  • SC 13G/ACogent Communications Group Inc6 Feb 2009
  • SC 13G/ACogent Communications Group Inc4 Sep 2008

FRONTIER CAPITAL MANAGEMENT CO LLC(8)

  • SC 13G/ACogent Communications Holdings, Inc.7 Feb 2018
  • SC 13G/ACogent Communications Holdings, Inc.10 Feb 2017
  • SC 13G/ACogent Communications Holdings, Inc.12 Feb 2016
  • SC 13G/ACogent Communications Holdings, Inc.13 Feb 2015
  • SC 13G/ACogent Communications Group Inc14 Feb 2014
  • SC 13G/ACogent Communications Group Inc14 Feb 2013
  • SC 13G/ACogent Communications Group Inc14 Feb 2012
  • SC 13GCogent Communications Group Inc14 Feb 2011

OAK MANAGEMENT CORP(7)

  • SC 13G/ACogent Communications Group Inc14 Feb 2007
  • SC 13GCogent Communications Group Inc23 Jun 2006
  • SC 13D/ACogent Communications Group Inc23 Feb 2005
  • SC 13D/ACogent Communications Group Inc6 Apr 2004
  • SC 13DCogent Communications Group Inc8 Aug 2003
  • SC 13G/ACogent Communications Group Inc7 Feb 2003
  • SC 13GCogent Communications Group Inc19 Feb 2002

BNP EUROPE TE LECOM & MEDIA FUND II LP(7)

  • SC 13D/ACogent Communications Group Inc27 Jun 2007
  • SC 13D/ACogent Communications Group Inc29 Nov 2006
  • SC 13D/ACogent Communications Group Inc16 Jun 2006
  • SC 13D/ACogent Communications Group Inc14 Apr 2005
  • SC 13D/ACogent Communications Group Inc17 Dec 2004
  • SC 13D/ACogent Communications Group Inc5 Aug 2004
  • SC 13DCogent Communications Group Inc14 Apr 2004

MORGAN STANLEY(6)

  • SC 13G/ACogent Communications Group Inc8 Feb 2012
  • SC 13G/ACogent Communications Group Inc9 Feb 2011
  • SC 13G/ACogent Communications Group Inc12 Feb 2010
  • SC 13G/ACogent Communications Group Inc17 Feb 2009
  • SC 13G/ACogent Communications Group Inc10 Mar 2008
  • SC 13GCogent Communications Group Inc14 Feb 2008

PRICE T ROWE ASSOCIATES INC /MD/(5)

  • SC 13G/ACogent Communications Group Inc17 Feb 2011
  • SC 13G/ACogent Communications Group Inc12 Feb 2010
  • SC 13G/ACogent Communications Group Inc12 Feb 2009
  • SC 13G/ACogent Communications Group Inc10 Mar 2008
  • SC 13GCogent Communications Group Inc13 Feb 2008

RENAISSANCE TECHNOLOGIES LLC(5)

  • SC 13G/ACogent Communications Holdings, Inc.10 Feb 2022
  • SC 13G/ACogent Communications Holdings, Inc.11 Feb 2021
  • SC 13G/ACogent Communications Holdings, Inc.13 Feb 2020
  • SC 13G/ACogent Communications Holdings, Inc.13 Feb 2019
  • SC 13GCogent Communications Holdings, Inc.14 Feb 2018

WORLDVIEW TECHNOLOGY PARTNERS IV LP(5)

  • SC 13D/ACogent Communications Group Inc20 Nov 2006
  • SC 13D/ACogent Communications Group Inc3 Jul 2006
  • SC 13D/ACogent Communications Group Inc9 Apr 2004
  • SC 13DCogent Communications Group Inc11 Aug 2003
  • SC 13GCogent Communications Group Inc14 Feb 2003

JERUSALEM VENTURE PARTNERS IV LP(5)

  • SC 13D/ACogent Communications Group Inc20 Nov 2006
  • SC 13D/ACogent Communications Group Inc19 Sep 2006
  • SC 13D/ACogent Communications Group Inc23 Jun 2006
  • SC 13D/ACogent Communications Group Inc9 Apr 2004
  • SC 13DCogent Communications Group Inc11 Aug 2003

Norges Bank(5)

  • SC 13G/ACogent Communications Group Inc17 Jun 2009
  • SC 13GCogent Communications Group Inc17 Feb 2009
  • SC 13G/ACogent Communications Group Inc17 Feb 2009
  • SC 13GCogent Communications Group Inc22 Jan 2009
  • SC 13GCogent Communications Group Inc27 May 2008

BlackRock, Inc.(5)

  • SC 13G/ACogent Communications Holdings, Inc.5 Oct
  • SC 13G/ACogent Communications Holdings, Inc.23 Jan
  • SC 13G/ACogent Communications Holdings, Inc.18 Jul 2025
  • SC 13G/ACogent Communications Holdings, Inc.8 Nov 2024
  • SC 13G/ACogent Communications Holdings, Inc.23 Oct 2024

Cisco Systems Capital CORP(4)

  • SC 13G/ACogent Communications Group Inc14 Feb 2006
  • SC 13D/ACogent Communications Group Inc27 Jun 2005
  • SC 13GCogent Communications Group Inc27 Jun 2005
  • SC 13DCogent Communications Group Inc17 Feb 2005

CHILTON INVESTMENT CO LLC(4)

  • SC 13G/ACogent Communications Group Inc12 Feb 2010
  • SC 13G/ACogent Communications Group Inc10 Sep 2009
  • SC 13G/ACogent Communications Group Inc13 Feb 2009
  • SC 13GCogent Communications Group Inc10 Nov 2008

BCP CAPITAL, L.P.(3)

  • SC 13D/ACogent Communications Group Inc16 Mar 2005
  • SC 13D/ACogent Communications Group Inc21 Apr 2004
  • SC 13DCogent Communications Group Inc11 Aug 2003

TREMBLANT CAPITAL GROUP(3)

  • SC 13G/ACogent Communications Group Inc17 Feb 2009
  • SC 13G/ACogent Communications Group Inc14 Feb 2008
  • SC 13GCogent Communications Group Inc9 Aug 2007

Sarbit Advisory Services Inc.(3)

  • SC 13G/ACogent Communications Holdings, Inc.12 Feb 2015
  • SC 13GCogent Communications Group Inc12 Feb 2014
  • SC 13GCogent Communications Group Inc14 Feb 2013

Turtle Creek Asset Management Inc.(3)

  • SC 13G/ACogent Communications Holdings, Inc.17 Feb
  • SC 13G/ACogent Communications Holdings, Inc.14 Nov 2025
  • SC 13GCogent Communications Holdings, Inc.14 Aug 2025

JENNISON ASSOCIATES LLC(2)

  • SC 13G/ACogent Communications Holdings, Inc.9 Feb 2015
  • SC 13GCogent Communications Group Inc6 Feb 2014

VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.(2)

  • SC 13G/ACogent Communications Holdings, Inc.26 Jan 2024
  • SC 13GCogent Communications Holdings, Inc.3 Feb 2023

ZIFF ASSET MANAGEMENT LP(2)

  • SC 13G/ACogent Communications Group Inc13 Feb 2008
  • SC 13GCogent Communications Group Inc1 Feb 2007

MORTON HOLDINGS, INC.(2)

  • SC 13G/ACogent Communications Group Inc17 Feb 2009
  • SC 13GCogent Communications Group Inc19 Feb 2008

PENINSULA INVESTMENT PARTNERS, L.P.(2)

  • SC 13G/ACogent Communications Group Inc10 Feb 2010
  • SC 13GCogent Communications Group Inc26 Jan 2009

PRUDENTIAL FINANCIAL INC(2)

  • SC 13G/ACogent Communications Holdings, Inc.2 Feb 2015
  • SC 13GCogent Communications Group Inc5 Feb 2014

SHUMWAY CAPITAL PARTNERS LLC(2)

  • SC 13G/ACogent Communications Group Inc17 Feb 2009
  • SC 13GCogent Communications Group Inc10 Dec 2007

PENINSULA CAPITAL ADVISORS LLC(2)

  • SC 13G/ACogent Communications Group Inc2 Feb 2012
  • SC 13G/ACogent Communications Group Inc14 Feb 2011

Park West Asset Management LLC(2)

  • SC 13G/ACogent Communications Holdings, Inc.17 Jun
  • SC 13GCogent Communications Holdings, Inc.22 May

Schreiber Suydam Van Zandt(2)

  • SC 13G/ACogent Communications Group Inc12 Dec 2007
  • SC 13GCogent Communications Group Inc17 Aug 2007

VANGUARD PORTFOLIO MANAGEMENT LLC(2)

  • SC 13G/ACogent Communications Holdings, Inc.31 Jul
  • SC 13GCogent Communications Holdings, Inc.29 Apr

STATE STREET CORP(1)

  • SC 13GCogent Communications Holdings, Inc.7 Aug

JERUSALEM VENTURE PARTNERS L P(1)

  • SC 13G/ACogent Communications Group Inc14 Feb 2003

PETERSON KENNETH D JR(1)

  • SC 13GCogent Communications Group Inc8 Nov 2004