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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001193125-18-034127
Filing Date
2018-02-07
Accepted
2018-02-07 10:15:03
Documents
1

Document Format Files

Seq Description Document Type Size
1 SC 13G/A d505109dsc13ga.htm SC 13G/A 38129
  Complete submission text file 0001193125-18-034127.txt   39524
Mailing Address 2450 N STREET, NW WASHINGTON DC 20037
Business Address 2450 N STREET, NW WASHINGTON DC 20037 2022954200
COGENT COMMUNICATIONS HOLDINGS, INC. (Subject) CIK: 0001158324 (see all company filings)

IRS No.: 522337274 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-78106 | Film No.: 18579614
SIC: 4899 Communications Services, NEC

Mailing Address
Business Address 99 SUMMER STREET BOSTON MA 02110
FRONTIER CAPITAL MANAGEMENT CO LLC (Filed by) CIK: 0001216488 (see all company filings)

IRS No.: 043492668 | State of Incorp.: DE
Type: SC 13G/A