Duolingo’s $350M Volume Slumps 41.53% to 302nd in Market Activity Amid Regulatory Filings

On August 15, 2025, Duolingo (DUOL) traded with a volume of $350 million, a 41.53% decline from the previous day, ranking 302nd in market activity. The stock closed 0.89% lower, reflecting subdued trading interest amid regulatory filings.

A Form 144 filing revealed plans to sell 1,444 restricted shares of Duolingo through Morgan Stanley, valued at $475,123.94. The shares were acquired directly from the issuer on the same date and represent less than 0.003% of the company’s 45.8 million outstanding shares. A separate filing disclosed a prior insider sale of 2,635 shares on May 16, 2025, generating $1.39 million in proceeds.

Both transactions comply with Rule 144 requirements, with the seller certifying no undisclosed material information about the company. While the sales highlight routine insider liquidity events, their small scale is unlikely to impact broader market sentiment or valuation metrics.

The strategy of buying the top 500 stocks by daily trading volume and holding them for one day from 2022 to now delivered moderate returns. The 1-day return was 0.98%, with a total return of 31.52% over 365 days. This indicates the strategy captured some short-term momentum but also reflected market volatility and potential timing risks.