Co-founder Luis von Ahn Files to Sell $16.3M of Duolingo Stock
DUOL sits 72% above its 52-week low of $87.89.
Summary
Duolingo co-founder and CEO Luis von Ahn filed to sell $16.3 million of stock under a pre-arranged 10b5-1 plan, a significant increase from his prior sales.
Key Events · Ownership and Investor Activity · DUOL
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Co-founder Files $16.3M Sale
Luis von Ahn filed a Form 144 to sell 110,046 shares valued at approximately $16.3 million, with a proposed sale date of October 7, 2026.
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10b5-1 Plan Execution
The sale is under a pre-arranged 10b5-1 trading plan adopted on June 2, 2026, indicating the sale was scheduled in advance.
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Escalating Insider Distribution
This filing is materially larger than von Ahn's prior 144 filings on September 16, 2026, which totaled approximately $7.3 million combined.
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Recent Sales History
In the past three months, von Ahn and his foundation have sold 169,954 shares for gross proceeds of approximately $25.6 million.
Analysis · DUOL · Technology
Luis von Ahn, Duolingo's co-founder, CEO, and largest shareholder, has filed to sell 110,046 shares worth approximately $16.3 million under a pre-arranged 10b5-1 plan adopted on June 2, 2026. This is a significant escalation from his prior 144 filings in September, which totaled roughly $7.3 million combined. The sale is part of an ongoing distribution pattern — insiders have sold over $20 million in the last 90 days — and comes after Q2 revenue beat but Q3 guidance disappointed. While the 10b5-1 plan means the sale is pre-planned and not a reaction to current news, the sheer size of this tranche makes it a notable overhang on the stock.
How filings like this one have moved
In the 30 days to Oct 7, 2026, 29% of the 1648 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.62%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, DUOL was trading at $150.89 on NASDAQ in the Technology sector, with a market capitalization of approximately $7.1B. The 52-week trading range was $87.89 to $353.00. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.