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Schedule II VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2025
Schedule II VALUATION AND QUALIFYING ACCOUNTS  
Schedule II VALUATION AND QUALIFYING ACCOUNTS

Schedule II

COGENT COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS

(in thousands)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Balance at

​

Charged to

​

​

​

​

Balance at

​

​

Beginning of

​

Costs and

​

​

​

​

End of

Description

  ​ ​ ​

Period

  ​ ​ ​

Expenses

  ​ ​ ​

(Deductions)

  ​ ​ ​

Period

Deferred tax valuation allowance

​

​

​

​

​

​

​

​

​

​

​

​

Year ended December 31, 2023

 

$

140,895

​

$

10,486

​

$

(14,848)

​

$

136,533

Year ended December 31, 2024

 

$

136,533

​

$

2,055

​

$

(6,815)

​

$

131,773

Year ended December 31, 2025

 

$

131,773

​

$

17,317

​

$

(1,035)

​

$

148,055

​