The selling is too small in proportion to market cap to drive a bearish thesis, but the cluster of three insiders (including a director) warrants monitoring for any upcoming material news (e.g., earnings, regulatory updates). Given the historical underperformance of bullish calls on ISRG, avoid over-interpreting this as a negative signal. Watch for any Form 4 filings from C-suite executives in the next 30 days.
Price Chart
Executive Summary
A cluster of insider selling at Intuitive Surgical, led by Director Gary Guthart's $4M open-market sale, totals $4.06M in a 7-day window. While the dollar amount is modest relative to the $138.2B market cap (0.003%), the involvement of a director alongside an EVP and another director signals a coordinated reduction. Historical calibration shows past bullish calls on ISRG have underperformed (22% win rate at T+20), and the score-7 cell has a 40% observed up-move rate with a net negative asymmetric payoff, warranting a downward bias on impact. The selling is routine in proportion but notable for its clustering among senior insiders, though the small share counts for non-Guthart trades suggest liquidity-driven sales rather than a bearish signal.
Key Financial Metrics
Key Facts
- Director Gary Guthart sold 10,000 shares for $4.0M on 2026-08-11
- EVP Mark Brosius sold 77 shares on three separate days totaling ~$91K
- Director Amy Ladd sold 72 shares for $28K on 2026-08-11
- Total cluster value of $4.06M represents ~0.003% of ISRG's $138.2B market cap
- Historical calibration shows score-7 calls on this segment have a 40% observed up-move rate with mean loss of -15.0% on losses vs +10.6% on wins, suggesting over-scoring risk
Financial Impact
Total insider selling of $4.06M, or 0.003% of market cap — trivial relative to company size
Risk Factors
- Insider selling could accelerate if broader market or sector weakness emerges
- No evidence of 10b5-1 plans for these sales, leaving open the possibility of opportunistic timing
- Historical calibration suggests bullish reads on ISRG have been unreliable (22% win rate at T+20)
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ISRG-1787176892046 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 7, 2026 11d ago | ANALYST-UPGRADE | $414.52 $422.06 | ▲ +1.82% | ▲ +1.72% | $426.70 (+2.94%) |
Sep 16, 2026 4w ago | Insider Cluster | $382.29 $398.30 | ▲ +4.19% | ▲ +1.62% | $426.70 (+11.62%) |
Aug 19, 2026 8w ago | Insider Cluster | $374.48 $367.07 | ▼ −1.98% | ▼ −3.09% | $426.70 (+13.94%) |
Aug 13, 2026 9w ago | Court Ruling | $401.27 $374.48 | ▲ +6.68% | ▲ +4.71% | $426.70 (−6.34%) |
Aug 12, 2026 9w ago | ANALYST-UPGRADE | $401.27 $397.72 | ▼ −0.88% | ▼ −0.44% | $426.70 (+6.34%) |
Aug 12, 2026 9w ago | Insider Cluster | $401.27 $397.72 | ▼ −0.88% | ▼ −0.44% | $426.70 (+6.34%) |
Aug 11, 2026 9w ago | Insider Cluster | $401.27 $397.72 | ▼ −0.88% | ▼ −0.44% | $426.70 (+6.34%) |
Jul 30, 2026 11w ago | ANALYST-DOWNGRADE | $352.97 $373.71 | ▲ +5.88% | ▲ +2.25% | $426.70 (+20.89%) |
Jul 16, 2026 13w ago | Press Release | $345.42 $332.02 | ▼ −3.88% | ▼ −3.19% | $426.70 (+23.53%) |
Jul 9, 2026 14w ago | ANALYST-UPGRADE | $411.55 $402.33 | ▼ −2.24% | ▼ −2.11% | $426.70 (+3.68%) |
US Market Status
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