We recently published December Disappointments: 10 Big Names Troubled Early. Adaptive Biotechnologies Corp. (NASDAQ:ADPT) is one of the worst performers of last week. Adaptive Biotechnologies fell by 24.5 percent week-on-week as investors took path from three key executives’ disposition of a significant stake in the company. In separate regulatory filings last week, Adaptive Biotechnologies Corp. (NASDAQ:ADPT) said that Chairman and CEO Chad Robins, his elder brother, Harlan, who is currently chief scienti ...