This cluster is not directionally informative. The CSO's sales are multiple insider sells — but not a cluster of multiple C-suite members selling simultaneously — and the dollar value is routine for a $2.8B company. Monitor for any upcoming catalyst (e.g., data readout, partnership) that might have motivated the CSO to liquidate, but the filing itself warrants no trading action.
Price Chart
Executive Summary
ADPT's Chief Scientific Officer sold $1.85M of stock in two open-market transactions within a week, the cluster's only activity. At a $2.8B market cap, this represents ~0.07% of value — below the 0.1% materiality threshold. No other C-suite insiders traded simultaneously, and the COO's small sale ($95K) appears routine vesting or plan-driven. The cluster does not signal a bearish view from management.
Key Financial Metrics
Key Facts
- CSO Harlan Robins sold ~106,160 shares total for ~$1.85M in two open-market sales on June 15-16, 2026.
- CCO Susan Bobulsky sold 5,000 shares for $95K on June 11, 2026 — likely routine / plan-driven.
- Cluster total value ~$1.95M equals ~0.07% of ADPT's $2.8B market cap — below the 0.1% materiality threshold.
- No CEO or CFO sales; no insider buying in the cluster.
- Prior 30-day insider activity showed $2.8M in total sells — this cluster is consistent with that normal pattern.
Financial Impact
~$1.95M total sales, representing ~0.07% of market cap — immaterial percentage-wise.
Risk Factors
- CSO selling ahead of a material non-public event cannot be ruled out, but the pattern is not suspicious.
- If future filings reveal a negative catalyst, the timing of these sales could be scrutinized.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ADPT-1781741587288 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 6, 2026 19d ago | 144 | $26.28 | awaiting T+20 | — | $26.04 (−0.91%) |
Oct 5, 2026 20d ago | Insider Cluster | $26.90 | awaiting T+20 | — | $26.04 (−3.20%) |
Sep 25, 2026 4w ago | Press Release | $29.43 $25.51 | ▼ −13.32% | ▼ −11.84% | $26.04 (−11.52%) |
Sep 18, 2026 5w ago | Insider Cluster | $27.86 $23.95 | ▲ +14.03% | ▲ +13.13% | $26.04 (+6.53%) |
Aug 20, 2026 9w ago | Insider Cluster | $25.99 $27.86 | ▲ +7.20% | ▲ +7.72% | $26.04 (+0.19%) |
Aug 19, 2026 9w ago | Insider Cluster | $25.44 $28.55 | ▼ −12.22% | ▼ −12.22% | $26.04 (−2.36%) |
Aug 18, 2026 9w ago | 144 | $25.49 $26.68 | ▲ +4.67% | ▲ +6.19% | $26.04 (+2.16%) |
Aug 17, 2026 9w ago | 144 | $24.56 $27.67 | ▼ −12.66% | ▼ −13.97% | $26.04 (−6.03%) |
Jul 29, 2026 12w ago | Institutional Cluster | $24.18 $26.44 | ▼ −9.35% | ▼ −5.38% | $26.04 (−7.69%) |
Jul 23, 2026 13w ago | Insider Cluster | $22.27 $25.99 | ▲ +16.70% | ▲ +13.08% | $26.04 (+16.93%) |
US Market Status
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