ADTN r&d expenses history

Quarterly · USD. Dates are reporting period ends; fiscal years can differ from calendar years.

Adtran Holdings Inc R&D Expenses — Quarterly (USD)
Period ending	R&D Expenses (USD)
Jun 30, 2026	53,779,000
Mar 31, 2026	50,777,000
Dec 31, 2025	51,842,000
Sep 30, 2025	51,680,000
Jun 30, 2025	51,895,000
Mar 31, 2025	48,859,000
Dec 31, 2024	49,210,000
Sep 30, 2024	51,615,000
Jun 30, 2024	60,388,000
Mar 31, 2024	56,190,000
Dec 31, 2023	54,818,000
Sep 30, 2023	62,752,000
Jun 30, 2023	70,598,000
Mar 31, 2023	70,143,000
Dec 31, 2022	61,570,000
Sep 30, 2022	59,196,000
Jun 30, 2022	26,500,000
Mar 31, 2022	26,491,000
Dec 31, 2021	26,532,000
Sep 30, 2021	26,759,000
Jun 30, 2021	27,871,000
Mar 31, 2021	27,501,000
Dec 31, 2020	27,493,000
Sep 30, 2020	27,223,000
Jun 30, 2020	28,712,000
Mar 31, 2020	29,859,000
Dec 31, 2019	31,221,000
Sep 30, 2019	31,835,000
Jun 30, 2019	32,064,000
Mar 31, 2019	31,647,000
Dec 31, 2018	31,092,000
Sep 30, 2018	29,877,000
Jun 30, 2018	30,729,000
Mar 31, 2018	32,849,000
Dec 31, 2017	31,489,000
Sep 30, 2017	33,528,000
Jun 30, 2017	33,501,000
Mar 31, 2017	31,916,000
Dec 31, 2016	32,077,000
Sep 30, 2016	31,962,000
Jun 30, 2016	31,277,000
Mar 31, 2016	29,488,000
Dec 31, 2015	29,300,000
Sep 30, 2015	32,561,000
Jun 30, 2015	35,479,000
Mar 31, 2015	32,536,000
Dec 31, 2014	32,711,000
Sep 30, 2014	33,324,000
Jun 30, 2014	33,670,000
Mar 31, 2014	32,553,000
Dec 31, 2013	32,941,000
Sep 30, 2013	32,543,000
Jun 30, 2013	33,060,000
Mar 31, 2013	32,511,000
Dec 31, 2012	33,116,000
Sep 30, 2012	35,582,000
Jun 30, 2012	32,458,000
Mar 31, 2012	24,795,000
Dec 31, 2011	25,151,000
Sep 30, 2011	26,894,000
Jun 30, 2011	24,619,000
Mar 31, 2011	23,637,000
Dec 31, 2010	22,462,000
Sep 30, 2010	22,802,000
Jun 30, 2010	22,257,000
Mar 31, 2010	22,779,000
Dec 31, 2009	21,256,000
Sep 30, 2009	20,497,000
Jun 30, 2009	20,670,000
Mar 31, 2009	20,862,000
Dec 31, 2008	20,363,000
Sep 30, 2008	21,688,000
Jun 30, 2008	20,215,000
Mar 31, 2008	19,553,000
Dec 31, 2007	18,728,000
Sep 30, 2007	18,735,000
Jun 30, 2007	19,546,000
Mar 31, 2007	18,358,000
Dec 31, 2006	17,119,000
Sep 30, 2006	18,346,000
Jun 30, 2006	17,469,000
Mar 31, 2006	17,766,000
Dec 31, 2005	14,857,000
Sep 30, 2005	15,087,000
Jun 30, 2005	16,367,000
Mar 31, 2005	16,343,000
Dec 31, 2004	17,812,000
Sep 30, 2004	18,859,000
Jun 30, 2004	15,896,000
Mar 31, 2004	14,817,000
Dec 31, 2003	15,245,204
Sep 30, 2003	14,989,448
Jun 30, 2003	13,638,856
Mar 31, 2003	14,270,491
Dec 31, 2002	13,814,756
Sep 30, 2002	14,008,528
Jun 30, 2002	14,637,503
Mar 31, 2002	13,834,261
Dec 31, 2001	13,980,855
Sep 30, 2001	15,180,334