Wed, Jun 17, 2026
17d ago
17,340 shares @ $0.00
New position
Cluster Buy
Trade made by a director
Part of a cluster of 2 transactions by 2 insiders
Unscheduled trade
59% win rate · +7.4% median edge vs SPY (233 trades, 90-day)
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