5 insiders bought SION within a short window (2025-02-10), $62.5M in total — cluster score 55/100. Members see the buyers, the score breakdown and the chart.
See the cluster| Filed | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| 2026-07-09 | ORBIMED ADVISORS LLC Director | Sold | 85,918 | $44.86 | $3.9M |
| 2026-07-09 | Thompson Peter A. Director | Sold | 85,918 | $44.86 | $3.9M |
| 2026-07-02 | ORBIMED ADVISORS LLC Director | Sold | 115,844 | $45.50 | $5.3M |
| 2026-07-02 | Thompson Peter A. Director | Sold | 115,844 | $45.50 | $5.3M |
| 2026-05-11 | Thompson Peter A. Director | Sold | 292,952 | $45.62 | $13.4M |
| 2026-05-11 | ORBIMED ADVISORS LLC Director | Sold | 292,952 | $45.62 | $13.4M |
| 2026-04-21 | Thompson Peter A. Director | Sold | 52,397 | $44.68 | $2.3M |
| 2026-04-21 | ORBIMED ADVISORS LLC Director | Sold | 52,397 | $44.68 | $2.3M |
| 2026-04-16 | Thompson Peter A. Director | Sold | 510,583 | $44.94 | $22.9M |
| 2026-04-16 | ORBIMED ADVISORS LLC Director | Sold | 510,583 | $44.94 | $22.9M |
| 2026-02-04 | Thompson Peter A. Director | Sold | 29,063 | $44.58 | $1.3M |
| 2026-02-04 | ORBIMED ADVISORS LLC Director | Sold | 29,063 | $44.58 | $1.3M |
| 2026-01-26 | COULTER JAMES G 10% owner | Sold | 250,000 | $40.00 | $10.0M |
| 2025-12-29 | ORBIMED ADVISORS LLC Director | Sold | 33,356 | $44.55 | $1.5M |
| 2025-12-29 | Thompson Peter A. Director | Sold | 33,356 | $44.55 | $1.5M |
| 2025-11-26 | ORBIMED ADVISORS LLC Director | Sold | 94,583 | $44.54 | $4.2M |
| 2025-11-26 | Thompson Peter A. Director | Sold | 94,583 | $44.54 | $4.2M |
| 2025-10-28 | Kolchinsky Peter Director · 10% owner | Sold | 328,276 | $39.51 | $13.0M |
| 2025-10-22 | Cloonan Michael President & CEO | Sold | 63,581 | $36.52 | $2.3M |
| 2025-10-20 | Booth Bruce Director | Sold | 118,413 | $32.40 | $3.8M |
| 2025-10-15 | Booth Bruce Director | Sold | 109,774 | $30.35 | $3.3M |
| 2025-10-01 | Booth Bruce Director | Sold | 54,637 | $30.09 | $1.6M |
| 2025-07-01 | COULTER JAMES G 10% owner | Bought | 60,000 | $15.84 | $950k |
| 2025-02-12 | COULTER JAMES Gcluster 10% owner | Bought | 1,125,000 | $18.00 | $20.2M |
| 2025-02-10 | Kolchinsky Petercluster Director · 10% owner | Bought | 1,125,000 | $18.00 | $20.2M |
Showing the 25 most recent of 29 filings for SION in the last two years. The full history, the price chart with every buy and sell marked, and daily updates are in the members browser.
| Insider | Role | Buys | Total bought |
|---|---|---|---|
| COULTER JAMES G | 10% owner | 2 | $21.2M |
| Kolchinsky Peter | Director · 10% owner | 1 | $20.2M |
| ORBIMED ADVISORS LLC | Director | 1 | $9.9M |
| Thompson Peter A. | Director | 1 | $9.9M |
| Atlas Venture Associates Opportunity II, LLC | 10% owner | 1 | $1.1M |
| Booth Bruce | Director | 1 | $1.1M |
Every insider buy and sell for SION plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.
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