Fri, May 8, 2026
May 8
59,767 shares @ $44.58
Decreased holdings by -2.00%
58th largest trade (out of 310)
Large Trade
Trade made by a director
10b5-1 scheduled trade
58% win rate · +9.9% median edge vs SPY (201 trades, 90-day)
Price 28% 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 7ORBIMED ADVISORS LLCSold$2.17mApr 18ORBIMED ADVISORS LLCSold$131.24kApr 17OrbiMed Capital GP VIII LLCSold$2.34mApr 16OrbiMed Capital GP VIII LLCSold$10.29mApr 15ORBIMED ADVISORS LLCSold$10.53m