Condensed Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Additional paid-in capital	Accumulated other comprehensive loss	Accumulated deficit	Class A voting common stock	Class A voting common stock Common stock	Class B voting common stock	Class B voting common stock Common stock
Beginning balance (in shares) at Dec. 31, 2023						24,206,140		1,958,028
Beginning balance at Dec. 31, 2023	$ 297,390	$ 391,048	$ (28,794)	$ (64,890)		$ 24		$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)						10,849
Exercises of vested stock options	103	103
Vesting of restricted stock units (in shares)						920,435
Vesting of restricted stock units	1					$ 1
Equity awards withheld for tax liability (in shares)						(116,747)
Equity awards withheld for tax liability	(2,267)	(2,267)
Unrealized gain (loss) on marketable securities	9		9
Foreign currency translation	(9,340)		(9,340)
Stock-based compensation	21,536	21,536
Net income (loss)	(9,233)			(9,233)
Ending balance (in shares) at Mar. 31, 2024						25,020,677		1,958,028
Ending balance at Mar. 31, 2024	298,199	410,420	(38,125)	(74,123)		$ 25		$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)						1,625
Exercises of vested stock options	16	16
Vesting of restricted stock units (in shares)						251,015
Equity awards withheld for tax liability (in shares)						(1,351)
Equity awards withheld for tax liability	(24)	(24)
Unrealized gain (loss) on marketable securities	117		117
Foreign currency translation	(3,007)		(3,007)
Stock-based compensation	8,091	8,091
Net income (loss)	4,055			4,055
Ending balance (in shares) at Jun. 30, 2024						25,271,966		1,958,028
Ending balance at Jun. 30, 2024	307,447	418,503	(41,015)	(70,068)		$ 25		$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)						1,030
Exercises of vested stock options	10	10
Vesting of restricted stock units (in shares)						276,855
Vesting of restricted stock units	1					$ 1
Equity awards withheld for tax liability (in shares)						(181)
Equity awards withheld for tax liability	(3)	(3)
Unrealized gain (loss) on marketable securities	(78)		(78)
Foreign currency translation	20,538		20,538
Stock-based compensation	8,247	8,247
Net income (loss)	413			413
Ending balance (in shares) at Sep. 30, 2024						25,549,670		1,958,028
Ending balance at Sep. 30, 2024	336,575	426,757	(20,555)	(69,655)		$ 26		$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)						3,801
Exercises of vested stock options	38	38
Vesting of restricted stock units (in shares)						1,035,295
Vesting of restricted stock units	1					$ 1
Equity awards withheld for tax liability (in shares)						(78)
Equity awards withheld for tax liability	(2)	(2)
Unrealized gain (loss) on marketable securities	(109)		(109)
Foreign currency translation	(31,497)		(31,497)
Unrealized gain on employee benefit pension plan	152		152
Stock-based compensation	9,134	9,134
Net income (loss)	(1,759)			(1,759)
Ending balance (in shares) at Dec. 31, 2024					26,588,688	26,588,688	1,958,028	1,958,028
Ending balance at Dec. 31, 2024	$ 312,533	435,927	(52,009)	(71,414)		$ 27		$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercises of vested stock options (in shares)	925					925
Exercises of vested stock options	$ 9	9
Vesting of restricted stock units (in shares)						1,348,320
Vesting of restricted stock units	1					$ 1
Equity awards withheld for tax liability (in shares)						(183,018)
Equity awards withheld for tax liability	(2,932)	(2,932)
Unrealized gain (loss) on marketable securities	53		53
Foreign currency translation	15,409		15,409
Stock-based compensation	24,073	24,073
Net income (loss)	(3,740)			(3,740)
Ending balance (in shares) at Mar. 31, 2025					27,754,915	27,754,915	1,958,028	1,958,028
Ending balance at Mar. 31, 2025	$ 345,406	$ 457,077	$ (36,547)	$ (75,154)		$ 28		$ 2

Bandwidth Inc. 10-Q