Cite Filings / CCOI / 0001005477-07-001971

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4

Changes in Ownership

COGENT COMMUNICATIONS HOLDINGS, INC. Filed 2007-03-16 Acc 0001005477-07-001971

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4 Changes in Ownership , xslF345X02/edgar123.xml

Around this filing

2007-03-21 424B5 Prospectus
2007-03-20 424B3 Prospectus
2007-03-20 4 Changes in Ownership
2007-03-20 4 Changes in Ownership
2007-03-16 4 Changes in Ownership
2007-03-16 4 Changes in Ownership
2007-03-14 10-K Annual Report

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