Johan Christenson is 10% at TENGION INC (TNGN). They have made 3 open-market trades across 3 companies since 2011, most recently 2020-06-30.
CIK 0001488771
3 open-market purchases totalling $15.1M since 2011, never a sale. Too few scored purchases to measure a record yet.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.