The CEO's sale is the largest by dollar value, but at 0.005% of market cap it is well below the threshold for signaling concern. No insider buying to offset. Monitor next 8-K or earnings release for any fundamental change, but this cluster alone does not warrant a trading response.
Price Chart
Executive Summary
Three Teradyne insiders, including the CEO and a director, sold a total of ~$3.4M in open-market shares over a one-week window. The CEO's $2.91M sale is the dominant transaction, representing ~0.005% of the $56.1B market cap — a trivial proportion. Non-cash derivative exercises and tax-withholding transactions by the Semiconductor Test president add no economic signal. The cluster is routine in scale and lacks the materiality to suggest informed bearish conviction.
Key Financial Metrics
Key Facts
- CEO Smith Gregory Stephen sold 8,600 shares for ~$2.91M on 2026-05-15
- Director MATZ MARILYN sold 400 shares for $140K on 2026-05-21
- President Poulin Shannon John sold 1,008 shares for ~$348K on 2026-05-21 (plus derivative exercises and tax withholding)
- Total open-market sales: ~$3.4M, or ~0.006% of Teradyne's $56.1B market cap
- No insider open-market purchases were reported in the cluster window
Financial Impact
Total insider sales of ~$3.4M represent less than 0.01% of market cap — immaterial
Risk Factors
- CEO selling ~$2.9M could be diversification or 10b5-1 plan — not necessarily bearish
- No insider buying to provide a bullish counter-signal
- Historical calibration shows cluster reports on TER have a negative net alpha at T+20 (-2.68% after costs), suggesting over-scoring risk
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-TER-1779830647282 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 16, 2026 16d ago | Insider Cluster | $341.15 $389.14 | ▲ +14.07% | ▲ +11.50% | $447.92 (+31.30%) |
Aug 21, 2026 6w ago | ANALYST-DOWNGRADE | $375.74 $354.97 | ▼ −5.53% | ▼ −6.00% | $447.92 (+19.21%) |
Aug 18, 2026 6w ago | Insider Cluster | $404.29 $366.43 | ▼ −9.36% | ▼ −9.16% | $447.92 (+10.79%) |
Aug 10, 2026 7w ago | 8-K | $379.56 $404.29 | ▲ +6.52% | ▲ +6.92% | $447.92 (+18.01%) |
Jul 16, 2026 11w ago | Insider Cluster | $322.30 $373.75 | ▲ +15.96% | ▲ +17.63% | $447.92 (+38.98%) |
Jun 16, 2026 15w ago | Insider Cluster | $408.56 $427.20 | ▲ +4.56% | ▲ +5.60% | $447.92 (+9.63%) |
May 26, 2026 18w ago | Insider Cluster | $375.83 $392.62 | ▲ +4.47% | ▲ +3.26% | $447.92 (+19.18%) |
May 26, 2026 18w ago | Insider Cluster | $375.83 $392.62 | ▲ +4.47% | ▲ +3.26% | $447.92 (+19.18%) |
May 19, 2026 19w ago | Insider Cluster | $321.40 $372.75 | ▲ +15.98% | ▲ +13.73% | $447.92 (+39.37%) |
Apr 30, 2026 22w ago | ANALYST-UPGRADE | $345.42 $354.11 | ▲ +2.52% | ▲ +0.17% | $447.92 (+29.67%) |
US Market Status
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