CCOI

EX-99.1

2 tm2628890d1_ex99-1.htm

EXHIBIT 99.1

Exhibit 99.1

FOR

IMMEDIATE RELEASE

Cogent Contacts:

For Public Relations: For Investor Relations:

Jocelyn Johnson John Chang

+ 1 (202) 295-4299 + 1 (202) 295-4212

jajohnson@cogentco.com investor.relations@cogentco.com

Cogent Communications Reports Third Quarter 2026 Results

Financial and Business Highlights

·Service revenue totaled $231.2 million for Q3 2026 compared to $235.6 million for Q2 2026.

oOn-net revenue, including wavelengths, increased by 2.4% sequentially from Q2 2026 to $153.9 million for Q3 2026 and increased by 5.8% from Q3 2025.

oWavelength revenue, increased by 7.8% sequentially from Q2 2026 to $16.0 million for Q3 2026 and increased by 57.0% from Q3 2025.

·EBITDA, as adjusted, was $73.9 million for Q3 2026 and increased by 3.9% from Q2 2026.

oEBITDA, as adjusted, margin was 32.0% for Q3 2026 and was 30.2% for Q2 2026.

·Network operations expenses, excluding equity-based compensation expense, were $121.0 million for Q3 2026 and decreased by 3.1% from Q2 2026.

·Selling, general and administrative expenses, excluding equity-based compensation expense, were $61.3 million for Q3 2026 and decreased by 5.1% from Q2 2026.

·Capital expenditures were $36.3 million for Q3 2026 and decreased by 5.8% from Q2 2026.

·IP Network traffic for Q3 2026 increased by 4% from Q2 2026 and increased by 14% from Q3 2025.

·Total cash, including restricted cash, at the end of Q3 2026 was $181.3 million.

·Cogent purchased $118.4 million par value of its 2032 secured notes at a discount for $106.7 million for a gain of $11.3 million during Q3 2026 and in total purchased $138.8 million par value of its 2032 secured notes at a discount for $125.4 million for a gain of $12.9 million in 2026.

·Cogent purchased $50.0 million par value of its 2027 unsecured notes at a discount for $49.6 million for a gain of $0.1 million during Q3 2026.

·Cogent has entered into two non-binding letters of intent with two counter parties to sell four data centers Cogent acquired and repurposed in connection with its Sprint acquisition for a total of approximately $100.0 million in cash.

[WASHINGTON, D.C. November 5, 2026] Cogent Communications Holdings, Inc. (NASDAQ: CCOI) (“Cogent”, or the “Company”) today announced service revenue of $231.2 million for the three months ended September 30, 2026, a decrease of 1.8% from the three months ended June 30, 2026 and a decrease of 4.4% from the three months ended September 30, 2025.

Page 1 of 24

Foreign exchange rates negatively impacted service revenue growth from the three months ended June 30, 2026 to the three months ended September 30, 2026 by $0.3 million, and negatively impacted service revenue growth from the three months ended September 30, 2025 to the three months ended September 30, 2026 by $0.5 million. On a constant currency basis, service revenue decreased by 1.7% from the three months ended June 30, 2026 to the three months ended September 30, 2026, and decreased by 4.2% from the three months ended September 30, 2025 to the three months ended September 30, 2026.

On-net service is provided to customers located in buildings that are

physically connected to Cogent’s network by Cogent facilities. On-net revenue was $137.9 million for the three months ended September 30, 2026, an increase of 1.9% from the three months ended June 30, 2026 and an increase of 1.9% from the three months ended September 30, 2025.

Off-net customers are located in buildings directly connected to Cogent’s

network using other carriers’ facilities and services to provide the last mile portion of the link from the customers’ premises to Cogent’s network. Off-net revenue was $76.6 million for the three months ended September 30, 2026, a decrease of 9.3% from the three months ended June 30, 2026 and a decrease of 19.5% from the three months ended September 30, 2025.

Wavelength revenue was $16.0 million for the three months ended September 30, 2026, an increase of 7.8% from the three months ended June 30, 2026 and an increase of 57.0% from the three months ended September 30, 2025.

Non-core services are legacy services, which Cogent acquired and continues

to support but does not actively sell. Non-core revenue was $0.7 million for the three months ended September 30, 2026, $0.9 million for the three months ended June 30, 2026 and $1.4 million for the three months ended September 30, 2025.

GAAP gross profit is defined as total service revenue less network operations expense, depreciation and amortization and equity-based compensation included in network operations expense. GAAP gross margin is defined as GAAP gross profit divided by total service revenue. GAAP gross profit decreased by 1.6% from the three months ended June 30, 2026 to $56.7 million for the three months ended September 30, 2026 and increased by 13.7% from the three months ended September 30, 2025.

Page 2 of 24

GAAP gross margin was 24.5% for the three months ended September 30, 2

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