Duolingo (DUOL) 10% Owner Luis von Ahn Sells Shares

What Happened

• Luis von Ahn, a 10% owner of Duolingo (DUOL), executed conversions/exercises of derivative securities and sold the resulting shares on September 16, 2026. He sold a total of 28,292 shares in two open-market batches (27,272 and 1,020 shares) for aggregate proceeds of about $4.25 million. Separately, he acquired 23,040 shares at $14.42 (cost ~$332,237) and 5,252 shares at $38.08 (cost ~$199,996) via conversion/exercise transactions (total cash paid ≈ $532,233). The filing also shows conversions/exercises at $0, which reflect no-cost conversions of Class B into Class A common stock.

Key Details

• Transaction date: 2026-09-16; Form 4 filed 2026-09-18 (appears timely).
• Sales: 27,272 shares at a weighted average price reported $150.17 (range $150.00–$150.54 per F2) for $4,095,570; 1,020 shares at weighted average $151.54 (range $151.53–$152.55 per F3) for $154,571. Total proceeds ≈ $4,250,141.
• Acquisitions/conversions: 23,040 shares acquired at $14.42 ($332,237) and 5,252 shares at $38.08 ($199,996). Several zero-price conversion/exercise entries reflect Class B→Class A conversions.
• Footnotes: Sale executed under a Rule 10b5-1 trading plan adopted June 2, 2026 (F1). Broker provided weighted-average prices and will supply per-price breakdown on request (F2, F3). Options noted as fully vested (F4). F5 explains Class B shares convert to Class A at holder’s option or on certain events.
• Shares owned after the transactions: not specified in the provided data.

Context

• The pattern here shows derivative exercises/conversions followed by immediate open-market sales. Some shares were acquired by paying exercise prices ($14.42 and $38.08) and then sold at ~ $150+ per share, while other conversions at $0 are consistent with converting Class B common stock to Class A per the charter.
• Because the sales were made under a pre-established 10b5-1 plan, they were pre-planned and are commonly viewed as routine trading arrangements rather than discretionary, contemporaneous insider sales. As a 10% owner, von Ahn’s transactions reflect major-holder activity; filings do not imply management’s view of the company’s near-term prospects.