Sat, Apr 18, 2026
Apr 18
2,948 shares @ $44.52
Decreased holdings by -0.10%
Positive 90D History
Trade made by a director
10b5-1 scheduled trade
82% win rate · +16.7% median edge vs SPY (17 trades, 90-day · small sample)
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