This selling cluster is too small and routine to carry informational value. Monitor upcoming clinical catalysts (Phase 2 data) for the true driver of UPB's stock; insider activity at these levels is noise.
Price Chart
Executive Summary
Five Upstream Bio insiders (CEO, CFO/COO, CMO, CBO, General Counsel) sold a combined ~$31K worth of UPB stock on a single day at $6.10 per share. The total sales represent less than 0.01% of the company's $322M market cap, making this a routine, immaterial cluster. The uniform pricing and concurrent execution suggest scheduled or plan-driven sales, not a coordinated bearish signal.
Key Financial Metrics
Key Facts
- Five insiders sold shares on 2026-06-16: CEO (2,095 shares), CFO/COO (853 shares), CMO (895 shares), CBO (700 shares), GC (477 shares).
- All trades executed at $6.10 per share — same price and date, indicative of a trading plan or pre-arranged sale.
- Total sale value ~$30,600 is only 0.0095% of UPB's $322M market cap — immaterial.
- Recent insider activity (30d) shows $31K in sells; this cluster is consistent with an ongoing pattern of small, likely liquidity-motivated dispositions.
- No open-market purchases were recorded in the cluster.
Financial Impact
~$31K in total insider sales, representing a negligible fraction of market cap.
Risk Factors
- Small insider clusters can be misconstrued as sentiment signals; the dollar amount is immaterial.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-UPB-1781726738033 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 1, 2026 7w ago | 8-K | $6.55 | awaiting T+60 | — | $2.75 (−58.02%) |
Aug 11, 2026 10w ago | 8-K | $7.44 | awaiting T+60 | — | $2.75 (−63.04%) |
Jun 17, 2026 18w ago | Insider Cluster | $6.25 | awaiting T+60 | — | $2.75 (−56.00%) |
Jun 14, 2026 19w ago | Press Release | $6.10 $5.96 | ▼ −2.30% | ▼ −3.30% | $2.75 (−54.92%) |
May 18, 2026 23w ago | Press Release | $8.51 $6.91 | ▼ −18.80% | ▼ −23.65% | $2.75 (−67.69%) |
May 13, 2026 23w ago | Press Release | $9.36 $7.25 | ▲ +22.54% | ▲ +26.98% | $2.75 (+70.62%) |
Apr 17, 2026 27w ago | Press Release | $9.99 $7.14 | ▼ −28.53% | ▼ −34.67% | $2.75 (−72.47%) |
Mar 26, 2026 30w ago | 424B5 | $8.67 $6.41 | ▲ +26.07% | ▲ +42.13% | $2.75 (+68.28%) |
Mar 26, 2026 30w ago | Press Release | $9.79 $6.40 | ▼ −34.68% | ▼ −48.63% | $2.75 (−71.91%) |
Mar 16, 2026 32w ago | Insider Cluster | $9.61 $6.45 | ▼ −32.88% | ▼ −43.37% | $2.75 (−71.38%) |
US Market Status
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