The CEO's first large open-market sale since the company's recent run-up warrants monitoring for further insider selling ahead of the next earnings report. No 10b5-1 plan was noted, increasing the signal value of these sales.
Price Chart
Executive Summary
Duolingo's CEO and General Counsel sold a combined $4.99M in open-market sales over a one-week window, with the CEO alone accounting for $4.1M. This represents ~0.3% of market cap, a modest but notable cluster of insider selling at a high-growth company with no disclosed 10b5-1 plan context.
Key Financial Metrics
Key Facts
- CEO Luis von Ahn sold 27,300 shares for $4.10M on 2026-09-16
- General Counsel Stephen Chen sold 6,000 shares for $895K on 2026-09-14
- Total insider sales: $4.99M over 8-day window
- No 10b5-1 plan or tax-withholding code indicated — all open-market sales (code S)
- Sales represent ~0.3% of Duolingo's market cap
Financial Impact
$4.99M in insider sales, ~0.3% of market cap
Risk Factors
- CEO selling $4.1M without a disclosed 10b5-1 plan may signal peak valuation concerns
- General Counsel selling alongside CEO amplifies the cluster signal
- Insider selling at a high-growth tech company often precedes earnings deceleration
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-DUOL-1790198096647 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 20, 2026 6d ago | SC 13G/A | $139.58 | awaiting T+20 | — | $138.60 (−0.70%) |
Oct 7, 2026 19d ago | 144 | $151.22 | awaiting T+20 | — | $138.60 (−8.35%) |
Sep 23, 2026 4w ago | Insider Cluster | $147.75 $141.39 | ▲ +4.30% | ▲ +3.88% | $138.60 (+6.19%) |
Sep 18, 2026 5w ago | Insider Cluster | $149.42 $142.11 | ▲ +4.89% | ▲ +3.98% | $138.60 (+7.24%) |
Sep 15, 2026 5w ago | Insider Cluster | $148.17 $139.73 | ▼ −5.70% | ▼ −7.76% | $138.60 (−6.46%) |
Aug 19, 2026 9w ago | Insider Cluster | $147.03 $141.90 | ▼ −3.49% | ▼ −3.62% | $138.60 (−5.73%) |
Aug 18, 2026 9w ago | 8-K | $146.03 $147.10 | ▲ +0.73% | ▲ +2.68% | $138.60 (−5.09%) |
Aug 13, 2026 10w ago | Press Release | $144.10 $143.68 | ▼ −0.29% | ▲ +1.46% | $138.60 (−3.82%) |
Aug 12, 2026 10w ago | 3 | $144.10 $143.68 | ▼ −0.29% | ▲ +1.46% | $138.60 (−3.82%) |
Aug 10, 2026 11w ago | 8-K | $137.19 $146.39 | ▲ +6.71% | ▲ +7.62% | $138.60 (+1.03%) |
US Market Status
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