Duolingo Co-Founder Luis von Ahn Files to Sell $4.35M in Stock
DUOL sits 70% above its 52-week low of $87.89.
Summary
Duolingo co-founder Luis von Ahn filed to sell $4.35 million in stock under a pre-arranged 10b5-1 plan, the largest insider sale notice in the recent 90-day window.
Key Events · Ownership and Investor Activity · DUOL
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Co-Founder Files $4.35M Sale
Luis von Ahn Arellano filed Form 144 to sell 28,292 shares valued at approximately $4.35 million.
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10b5-1 Plan Adopted June 2
The sale is under a pre-arranged 10b5-1 trading plan adopted on June 2, 2026.
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Shares From Option Exercise
The shares were acquired via exercise of stock options on September 16, 2026, the same day as the filing.
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Largest Insider Sale in 90 Days
This is the largest single insider sale notice in the recent 90-day window, which has seen over $3.2 million in officer selling.
Analysis · DUOL · Technology
A Form 144 filed by Luis von Ahn, Duolingo's co-founder, director, officer, and 10% stockholder, discloses plans to sell 28,292 shares worth approximately $4.35 million. The sale is under a 10b5-1 plan adopted June 2, 2026, and the shares were acquired via option exercise on the same day as the filing. This is the largest single insider sale notice in the recent 90-day window, which has already seen a pattern of officer selling totaling over $3.2 million. While the 10b5-1 plan provides some context, the size and the filer's prominence make this a notable distribution signal.
How filings like this one have moved
In the 30 days to Sep 16, 2026, 29.6% of the 1716 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.32%. 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 $149.00 on NASDAQ in the Technology sector, with a market capitalization of approximately $6.9B. 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.