Fri, Nov 21, 2025
Nov 21
7,609 shares @ $39.50
Decreased holdings by -4.60%
52nd largest trade (out of 134)
Positive 90D History
Trade made by a director
Unscheduled trade
78% win rate · +8.5% median edge vs SPY (77 trades, 90-day)
Price 112% above 200-day moving average
Small Cap stock — insider trades carry more weight
Recent insider activity at SION
Jun 30ORBIMED ADVISORS LLCSold$5.27mMay 27ORBIMED ADVISORS LLCSold$4.49kMay 11OrbiMed Capital GP VIII LLCSold$8.53mMay 8ORBIMED ADVISORS LLCSold$2.66mMay 7ORBIMED ADVISORS LLCSold$2.17mApr 18ORBIMED ADVISORS LLCSold$131.24kApr 17OrbiMed Capital GP VIII LLCSold$2.34mApr 16OrbiMed Capital GP VIII LLCSold$10.29m