The cluster is small relative to market cap and follows a typical vesting/exercise pattern — not a material sell signal. Monitor for any upcoming earnings or FDA-related catalyst that could explain the timing, but standalone this is routine portfolio diversification. The historical calibration shows neutral-score reports on GKOS have averaged +0.67% T+20, suggesting the market tends to ignore these events.
Price Chart
Executive Summary
President & COO Joseph Gilliam and CFO Alex Thurman sold a combined $8.6M of GKOS stock in open-market transactions within a week. The COO's sales were tied to derivative exercises, but the CFO's $3.6M sale was a direct open-market disposition. At a $11B market cap, the cluster represents ~0.08% of shares outstanding — below the 0.1% materiality threshold — and is likely liquidity/vesting-driven rather than signaling fundamental deterioration. The stock has strong analyst support (86% bullish) and the historical calibration shows neutral-score reports on GKOS have had mixed T+20 outcomes (+0.67% avg). No cross-filing context suggests distress or an upcoming catalyst that would amplify this signal.
Key Financial Metrics
Key Facts
- President & COO Joseph Gilliam sold 60,000 shares for ~$10.8M (gross), including 32,037 shares at $180.49 and 27,963 shares at $178.89, all on 2026-08-11
- CFO Alex Thurman sold 20,000 shares at $180.13 for $3.6M on 2026-08-07
- Total open-market sales: $8.6M, representing ~0.08% of GKOS's $11B market cap
- Gilliam's sales were preceded by derivative exercises at $0, $48.46, and $55.18 strike prices — typical tax-withholding/vesting pattern
- GKOS has 86% analyst bullishness (8 Strong Buy, 10 Buy) and $11B market cap
Financial Impact
Insider sales of $8.6M represent ~0.08% of $11B market cap — below the 0.1% materiality threshold for a cluster of this size
Risk Factors
- Insider sales could accelerate if management perceives headwinds ahead of next earnings
- The COO sold nearly all exercised shares immediately — suggests no bullish conviction from top operations executive
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-GKOS-1786665674394 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 13, 2026 7w ago | Insider Cluster | $184.53 $171.09 | ▼ −7.28% | ▼ −5.29% | $165.29 (−10.43%) |
Aug 11, 2026 7w ago | Insider Cluster | $186.63 $170.38 | ▼ −8.71% | ▼ −6.81% | $165.29 (−11.43%) |
Aug 3, 2026 8w ago | 8-K | $170.87 $179.56 | ▲ +5.09% | ▲ +3.85% | $165.29 (−3.26%) |
Jul 9, 2026 12w ago | Insider Cluster | $155.07 $170.99 | ▲ +10.27% | ▲ +8.02% | $165.29 (+6.59%) |
May 4, 2026 21w ago | 8-K | $135.85 $103.12 | ▼ −24.09% | ▼ −29.74% | $165.29 (+21.67%) |
May 1, 2026 22w ago | Insider Cluster | $140.22 $103.12 | ▼ −26.46% | ▼ −31.74% | $165.29 (+17.88%) |
Mar 16, 2026 28w ago | Insider Cluster | $98.94 $120.52 | ▲ +21.81% | ▲ +18.03% | $165.29 (+67.06%) |
Mar 16, 2026 28w ago | Insider Cluster | $98.94 $120.52 | ▲ +21.81% | ▲ +18.03% | $165.29 (+67.06%) |
US Market Status
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