This is not uncommon Marvell Technology Group Ltd. Trading at $15 https://www.fool.com/investing/general/2015/10/27/marvell-technology-group-ltd-slumps-as-accountin-2.aspx TCP Announces Resignation Of Its Independent Accountants; Work Continues On Remediation Plan Trading at $1.14 https://www.thestreet.com/story/14010278/1/tcp-announces-resignation-of-its-independent-accountants-work-continues-on-remediation-plan.html