Insider Trading
Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.
| Ticker | Insider | Title | Date | Transaction | Price ($) | Shares | Value ($) | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| SION | Ra Capital Management, L.p. | Director | 09/17/2026 | Verkauf | 7.46 | 33,800 | 252,148 | Form 4 |
| SION | Ra Capital Management, L.p. | Director | 09/17/2026 | Verkauf | 6.32 | 3,415,011 | 21,582,870 | Form 4 |
| SION | Fitzpatrick Jennifer | CLO and Head of Program Mgmt. | 09/17/2026 | Zuteilung | — | 28,132 | — | Form 4 |
| SION | Fitzpatrick Jennifer | CLO and Head of Program Mgmt. | 09/17/2026 | Zuteilung | — | 28,133 | — | Form 4 |
| SION | McKee Charlotte | CMO and Head of R&D | 09/17/2026 | Zuteilung | — | 50,000 | — | Form 4 |
| SION | Ridloff Elena | CFO and CBO | 09/17/2026 | Zuteilung | — | 47,268 | — | Form 4 |
| SION | Ridloff Elena | CFO and CBO | 09/17/2026 | Zuteilung | — | 47,269 | — | Form 4 |
| SION | Cloonan Michael | President & CEO | 09/17/2026 | Zuteilung | — | 109,025 | — | Form 4 |
| SION | Thompson Peter A. | Director | 07/07/2026 | Verkauf | 44.86 | 85,918 | 3,854,281 | Form 4 |
| SION | Orbimed Advisors Llc | Director | 07/07/2026 | Verkauf | 44.86 | 85,918 | 3,854,281 | Form 4 |
| SION | Orbimed Advisors Llc | Director | 04/18/2026 | Verkauf | 44.52 | 2,948 | 131,245 | Form 4 |
| SION | Peter A Thompson | Director | 04/18/2026 | Verkauf | 44.52 | 2,948 | 131,245 | Form 4 |
| SION | Orbimed Advisors Llc | Director | 04/17/2026 | Verkauf | 44.68 | 52,397 | 2,341,098 | Form 4 |
| SION | Peter A Thompson | Director | 04/17/2026 | Verkauf | 44.68 | 52,397 | 2,341,098 | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).