Hacker Severin, Chief Technology Officer and Co-Founder of Duolingo (DUOL), has demonstrated a clear selling bias in recent transactions, with no open-market purchases reported since at least late 2025. SEC filings reveal Severin executed 15 sales totaling $47.7 million against just $380,800 in buys—a ratio exceeding 125:1 in dollar terms. The most significant disposals occurred on December 1, 2025 ($5.89 million) and February 17, 2026 ($3.44 million), with November 2025 seeing concentrated activity including eight separate sales on November 19 alone (ranging from $49,470 to $539,362) and seven more on November 4 (from $43,087 to $465,736).
All transactions involve DUOL shares, reflecting Severin’s exclusive focus on the language-learning platform where he holds a leadership role. The $380,800 buy—flagged as a "C" code transaction on November 19, 2025—appears to be an acquisition via conversion or derivative security rather than an open-market purchase. With no recent buys and consistent selling across multiple dates, Severin’s activity suggests ongoing monetization of equity. The pattern aligns with typical executive stock diversification, though the absence of offsetting purchases distinguishes it from balanced insider trading profiles.
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