Insider cluster buys of this size from two separate prominent insiders are rare and historically predictive per academic literature (Cohen/Malloy/Pomorski 2012: ~6% abnormal annual returns; Kang et al. 2018: cluster buys deliver ~3.8% 21-day CAR). The lack of 10b5-1 plans and the accelerating pace (Casdin bought every day May 18-20) suggests informed trading. Monitor for upcoming catalyst — earnings, M&A, or major partnership — that could explain the conviction buying. Cross-filing overrides amplify impact signal across insider-trades + earnings/agreement/offering contexts; consider scaling into a position.
Price Chart
Executive Summary
Two large-position insiders at GeneDx (WGS) — Casdin Capital (a director/10% owner) and director Keith Meister — purchased a combined $8.5M in stock over a five-day window ending May 18, 2026, with prices ranging from $38.28 to $42.55. This follows a broader 30-day insider buying spree totaling $39.8M, suggesting strong conviction in the company's trajectory or imminent catalyst.
Key Financial Metrics
Key Facts
- Two insiders (both directors with 10%+ positions) bought $8.5M in open-market purchases over 5 days.
- Casdin Capital purchased 500K shares ($21.5M) across May 18-20; Keith Meister bought 115.5K shares ($4.5M) on May 14-15.
- This cluster is part of a 30-day pattern of 10 insider buys totaling $39.8M — exceptional volume for a $1.3B market cap company.
- All purchases were direct open-market buys (code P) — not options exercises, awards, or 10b5-1 plan-driven.
- Total cluster value represents ~0.65% of WGS market cap — significant magnitude.
Financial Impact
$8.5M cluster value at ~$0.65% of market cap; broader $39.8M 30-day volume at ~3% of market cap
Risk Factors
- Insider buying does not guarantee near-term stock performance; historical WGS reports show negative T+20 alpha (-4.79%).
- Both buyers are directors/10% owners who may be focused on long-term governance rather than short-term trading — the buy signal may be slower to materialize.
- Stock has already rallied from ~$38 to ~$43 during the cluster window; some buying may be chasing momentum, not a fresh catalyst.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-WGS-1779320766396 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 11, 2026 21d ago | Insider Cluster | $85.27 $101.10 | ▲ +18.57% | ▲ +18.79% | $73.09 (−14.28%) |
Sep 1, 2026 4w ago | 144 | $86.72 $83.96 | ▼ −3.18% | ▼ −2.22% | $73.09 (−15.72%) |
Jul 27, 2026 9w ago | Press Release | $61.88 $67.86 | ▼ −9.66% | ▼ −7.39% | $73.09 (−18.12%) |
Jul 23, 2026 10w ago | Press Release | $63.38 $68.96 | ▼ −8.80% | ▼ −8.33% | $73.09 (−15.32%) |
Jun 16, 2026 15w ago | 8-K | $60.60 $58.08 | ▼ −4.16% | ▼ −1.93% | $73.09 (+20.61%) |
Jun 11, 2026 16w ago | Institutional Cluster | $59.92 $59.01 | ▼ −1.52% | ▼ −2.19% | $73.09 (+21.98%) |
Jun 8, 2026 16w ago | Insider Cluster | $56.33 $61.32 | ▲ +8.86% | ▲ +6.45% | $73.09 (+29.75%) |
May 20, 2026 19w ago | Insider Cluster | $47.33 $50.15 | ▲ +5.96% | ▲ +4.36% | $73.09 (+54.43%) |
Mar 26, 2026 27w ago | Insider Cluster | $61.35 $66.20 | ▼ −7.91% | ▼ −6.27% | $73.09 (−19.14%) |
Mar 4, 2026 30w ago | Insider Cluster | $79.47 $85.10 | ▼ −7.08% | ▼ −8.42% | $73.09 (+8.03%) |
US Market Status
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