Severin Hacker
CIK 1870272 · Chief Tech Officer, Co-Founder · last filed 2026-05-29
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$8.8K
Companies
1
Total Filings
73
Lifetime Open-Market Net
-$225.09M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| DUOL | Chief Tech Officer, Co-Founder | 72 | $122.63 | $8.8K | -$225.09M | 73 | 2026-05-29 |
Recent Filings · Page 3 of 8
73 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-04-23 | DUOL | Mixed | — | -$2.76M | EDGAR |
| 2025-04-09 | DUOL | Mixed | — | -$2.54M | EDGAR |
| 2025-03-21 | DUOL | Mixed | — | -$2.61M | EDGAR |
| 2025-03-06 | DUOL | Mixed | — | -$2.76M | EDGAR |
| 2025-02-21 | DUOL | Mixed | — | -$4.20M | EDGAR |
| 2025-02-06 | DUOL | Mixed | — | -$3.91M | EDGAR |
| 2025-01-23 | DUOL | Mixed | — | -$3.20M | EDGAR |
| 2025-01-07 | DUOL | Mixed | — | -$3.36M | EDGAR |
| 2025-01-03 | DUOL | Mixed | — | $0 | EDGAR |
| 2024-12-20 | DUOL | Mixed | — | -$3.37M | EDGAR |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.