SH
Insider
Severin Hacker
Chief Tech Officer, Co-FounderSeverin Hacker (Chief Tech Officer, Co-Founder) filed 5 Form 4 reports in the trailing twelve months (0 purchases, 5 sales), most often in Duolingo, Inc. (DUOL). The largest single filing was $3.0M of DUOL (9,391 sh across 8 lots, as filed), executed Oct 6 2025.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
–
no purchases on file
Delay-adjustediThe same average, entered at disclosure dates
–
returns measure stock purchases only
Filings, ttm
5
0 buys · 5 sells
Median delay
–
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$10.1M
shares × price, as filed
Last traded
Nov 19 2025
Filed Nov 20 2025
Median ADV $195.9M across their filed names
Open performance→Volume by month
Buys $0
Sells $170.4M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Technology
4 filings
Sector per market data · by filing · past 12 months
Most traded names
DUOL
Duolingo, Inc.
DUOL · 0 buys · 26 sells
26 filings
Recent filings
DUOLSALE
Duolingo, Inc.
View filing →
$14.0M41,252 sh across 8 lots
Exec Dec 12 2024
Filed Dec 13 2024 · 5:30 PM ET DUOLSALE Duolingo, Inc. View filing → $64.1M
188,901 sh across 25 lots
Exec Dec 11 2024
Filed Dec 13 2024 · 5:30 PM ET