Tatsiana Volkava/iStock via Getty Images Investment Overview - Illumina Says Goodbye To GRAIL, & It's Worst Ever Business Decision This week, Illumina (NASDAQ:ILMN), the San Diego, California-based gene sequencing giant, brought an end to a disastrous chapter in its relatively short history by completing the divestiture of GRAIL, the cancer testing business it helped to found. The GRAIL saga has run and run, and ultimately, played a significant role in destroying the value of Illumina stock. As I wrote in a ...