OTHER INFORMATION
−Removed: During the three months ended September 30, 2025, no director or officer of the Company adopted or terminated a “ Rule 10b5-1 trading arrangement” or “ non -Rule 10b5-1 trading arrangement,” as each term is defined in Item 408 of Regulation S-K.
+Added: During the three months ended March 31, 2026, no director or officer of the Company adopted or terminated a “ Rule 10b5-1 trading arrangement” or “ non -Rule 10b5-1 trading arrangement,” as each term is defined in Item 408 of Regulation S-K.
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Exhibit Number
−Removed: Indenture, dated as of June 17, 2025, among Cogent Communications Group, LLC, Cogent Finance, Inc., the guarantors named therein and Wilmington Trust, National Association, as trustee and collateral agent (previously filed as Exhibit 4.1 to our Current Report on Form 8-K, filed on June 17, 2025 and incorporated herein by reference).
−Removed: Form of 6.500% Senior Secured Note due 2032 (included as Exhibit A to Exhibit 4.1 hereto).
Certification of Chief Executive Officer (filed herewith)
2 unchanged sentences
Certification of Chief Financial Officer (furnished herewith)
−Removed: The following materials from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, formatted in Inline Extensible Business Reporting Language (XBRL), include:
+Added: The following materials from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in Inline Extensible Business Reporting Language (XBRL), include:
(i) the Condensed Consolidated Statements of Comprehensive Loss, (ii) the Condensed Consolidated Balance Sheets, (iii) the Condensed Consolidated Statements of Cash Flows, and (iv) related notes (filed herewith).
Cover Page Interactive Data File (the cover page XBRL tags are embedded within the iXBRL document).
+Added: Indicates a management contract or compensatory plan or arrangement in which directors or executive officers are eligible to participate.
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Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
−Removed: November 6, 2025
COGENT COMMUNICATIONS HOLDINGS, INC.
2 unchanged sentences
Chief Executive Officer
−Removed: November 6, 2025
/s/ Thaddeus G.
2 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.