0001844971 2026-03-05 2026-03-05 0001844971 us-gaap:CommonClassAMember 2026-03-05 2026-03-05 0001844971 gree:SeniorNotesDue2026850Member 2026-03-05 2026-03-05 false 0001844971 8-K/A 2026-03-05 Greenidge Generation Holdings Inc. DE 001-40808 86-1746728 1159 Pittsford-Victor Road Suite 240 Pittsford NY 14534 315 536-2359 false false false false Class A common stock, par value $.0001 GREE NASDAQ 8.50% Senior Notes due 2026 GREEL NASDAQ true false