The insider sales are too small relative to market cap to be a standalone bearish signal. However, the concentration of C-suite selling in a tight window (July 27-29) could precede a near-term catalyst like an earnings release or clinical data readout. Monitor for any upcoming NTRA 8-K or press release that may explain the timing. If no news emerges within 2 weeks, treat the cluster as routine portfolio rebalancing.
Price Chart
Executive Summary
A cluster of insider sales at Natera, with the CEO and CFO selling a combined ~$1.1M in open-market transactions over two days. While the dollar amount is modest relative to the $36.1B market cap (0.003%), the participation of the CEO, CFO, and other C-suite executives in a concentrated window warrants attention. The sales appear to be part of a broader 7-day cluster totaling ~$4.5M, but the lack of a clear catalyst or 10b5-1 plan disclosure suggests routine portfolio diversification rather than a bearish signal on fundamentals.
Key Financial Metrics
Key Facts
- CEO Steven Chapman sold 3,580 shares on 2026-07-28 for ~$910K
- CFO Michael Brophy sold 1,863 shares on 2026-07-29 for ~$465K
- Total open-market sales in the 7-day cluster: ~$4.5M across 16 trades
- Sales represent ~0.012% of Natera's $36.1B market cap
- Multiple C-suite executives (CEO, CFO, President, CLO) sold in the same window
Financial Impact
Total insider sales of ~$4.5M over 7 days, representing ~0.012% of market cap — trivial relative to company size
Risk Factors
- Insider sales may accelerate if the stock continues to trade near all-time highs
- Lack of 10b5-1 plan disclosure for some trades raises uncertainty about intent
- Historical calibration shows score-3 reports on NTRA have mixed T+20 outcomes (avg alpha -3.51% on one prior score-3)
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-NTRA-1785375332247 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 4, 2026 28d ago | Insider Cluster | $328.18 $341.79 | ▲ +4.15% | ▲ +5.36% | $402.75 (+22.72%) |
Aug 29, 2026 4w ago | Insider Cluster | $321.96 $328.59 | ▼ −2.06% | ▼ −2.20% | $402.75 (−25.09%) |
Aug 15, 2026 6w ago | Insider Cluster | $314.18 $327.72 | ▲ +4.31% | ▲ +5.50% | $402.75 (+28.19%) |
Aug 8, 2026 7w ago | Insider Cluster | $318.35 $314.18 | ▼ −1.31% | ▼ −1.26% | $402.75 (+26.51%) |
Aug 6, 2026 8w ago | Insider Cluster | $265.38 $310.78 | ▼ −17.11% | ▼ −15.89% | $402.75 (−51.76%) |
Jul 30, 2026 9w ago | Insider Cluster | $269.66 $265.38 | ▼ −1.59% | ▼ −5.21% | $402.75 (+49.35%) |
Jul 18, 2026 10w ago | Insider Cluster | $262.63 $261.99 | ▼ −0.24% | ▲ +0.18% | $402.75 (+53.35%) |
Jul 16, 2026 11w ago | Insider Cluster | $269.83 $264.69 | ▼ −1.90% | ▼ −0.23% | $402.75 (+49.26%) |
Jul 9, 2026 12w ago | Insider Cluster | $281.85 $269.83 | ▼ −4.26% | ▼ −4.13% | $402.75 (+42.90%) |
Jul 7, 2026 12w ago | Insider Cluster | $281.27 $272.66 | ▼ −3.06% | ▼ −3.61% | $402.75 (+43.19%) |
US Market Status
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