Career & Filing History
Every role Severin Hacker has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
Severin Hacker is the Chief Tech Officer, Co-Founder at Duolingo, Inc. (DUOL). Hacker has reported 20 insider filings with the SEC since 2024. The most recent filing was in May 2026.
Every role Severin Hacker has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
Duolingo, Inc. (DUOL)19 filingsUpdated Aug 31, 2026
Severin Hacker is Chief Tech Officer, Co-Founder, Director, 10% Owner of Duolingo, Inc. (DUOL). 19 SEC Form 4 filings on record going back to 2024, most recently on 29 May 2026. Most recent open-market trade: sold $49K of DUOL on 20 November 2025. Lifetime open-market sales: $113.07M.
Every recent SEC Form 4 transaction Severin Hacker has reported, most recent first.
InsiderAlpha's records for Severin Hacker go back to 2024: 19 primary Form 4 filings, an average of 6.3 per year. 122 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Insiders who reported open-market trades in the last 12 months at the companies Severin Hacker files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Severin Hacker is a corporate insider, tracked as Chief Tech Officer, Co-Founder, Director, 10% Owner of Duolingo, Inc. (DUOL). InsiderAlpha holds 19 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
The most recent primary Form 4 on record is dated 29 May 2026, one of 19 filings going back to 2024.
Recorded transactions: 0 open-market purchases and 152 open-market sales ($113.07M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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