Hacker Severin

Director · Officer · Ten-percent owner · DUOL

As of 2026-09-16, Hacker Severin has 449 Form 4 transactions on record across 1 company — 86 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $30.4MIndirect: $420.3M$450.8Mas of 2026-09-16
  • Direct $30.4M
  • Indirect $420.3M
DUOLindirect2,836,917 sh$420.3M
DUOLdirect205,273 sh$30.4M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

DUOL · 449 trades
2026-05-27: Withheld for tax, 31,920 sh ($3.4M)2026-05-27: Option exercise, 60,000 sh ($0)2026-05-27: Option exercise, 60,000 sh ($0)2026-02-17: Withheld for tax, 30,594 sh ($3.4M)2026-02-17: Option exercise, 60,000 sh ($0)2026-02-17: Option exercise, 60,000 sh ($0)2025-12-08: Conversion, 50,000 sh ($0)2025-12-08: Conversion, 50,000 sh ($0)2025-12-08: Gift, 50,000 sh ($0)2025-12-03: Option exercise, 5,252 sh ($200K)2025-12-03: Option exercise, 5,252 sh ($0)2025-12-01: Withheld for tax, 31,770 sh ($5.9M)2025-12-01: Option exercise, 60,000 sh ($0)2025-12-01: Option exercise, 60,000 sh ($0)2025-11-19: Sale, 3,089 sh ($539K)2025-11-19: Conversion, 10,000 sh ($381K)2025-11-19: Sale, 2,009 sh ($345K)2025-11-19: Sale, 1,281 sh ($221K)2025-11-19: Sale, 1,146 sh ($194K)2025-11-19: Sale, 1,000 sh ($171K)2025-11-19: Sale, 760 sh ($132K)2025-11-19: Sale, 435 sh ($76K)2025-11-19: Sale, 280 sh ($49K)2025-11-19: Conversion, 10,000 sh ($0)2025-11-19: Conversion, 10,000 sh ($0)2025-11-19: Option exercise, 10,000 sh ($0)2025-11-04: Sale, 1,778 sh ($466K)2025-11-04: Sale, 1,727 sh ($460K)2025-11-04: Sale, 1,625 sh ($429K)2025-11-04: Conversion, 10,000 sh ($381K)2025-11-04: Sale, 1,145 sh ($306K)2025-11-04: Sale, 936 sh ($242K)2025-11-04: Sale, 760 sh ($201K)2025-11-04: Sale, 744 sh ($192K)2025-11-04: Sale, 560 sh ($147K)2025-11-04: Sale, 560 sh ($145K)2025-11-04: Sale, 165 sh ($43K)2025-11-04: Option exercise, 10,000 sh ($0)2025-11-04: Conversion, 10,000 sh ($0)2025-11-04: Conversion, 10,000 sh ($0)2025-10-20: Withheld for tax, 31,770 sh ($9.9M)2025-10-20: Sale, 1,600 sh ($507K)2025-10-20: Sale, 1,281 sh ($400K)2025-10-20: Conversion, 10,000 sh ($381K)2025-10-20: Sale, 1,100 sh ($347K)2025-10-20: Sale, 1,000 sh ($311K)2025-10-20: Sale, 907 sh ($289K)2025-10-20: Sale, 680 sh ($216K)2025-10-20: Sale, 632 sh ($196K)2025-10-20: Sale, 600 sh ($185K)2025-10-20: Sale, 500 sh ($157K)2025-10-20: Sale, 500 sh ($155K)2025-10-20: Sale, 400 sh ($129K)2025-10-20: Sale, 300 sh ($97K)2025-10-20: Sale, 300 sh ($96K)2025-10-20: Sale, 100 sh ($32K)2025-10-20: Sale, 100 sh ($31K)2025-10-20: Conversion, 10,000 sh ($0)2025-10-20: Option exercise, 10,000 sh ($0)2025-10-20: Conversion, 10,000 sh ($0)2025-10-20: Option exercise, 60,000 sh ($0)2025-10-20: Option exercise, 60,000 sh ($0)2025-10-06: Sale, 1,916 sh ($610K)2025-10-06: Sale, 1,803 sh ($578K)2025-10-06: Sale, 1,599 sh ($511K)2025-10-06: Sale, 1,300 sh ($426K)2025-10-06: Conversion, 10,000 sh ($381K)2025-10-06: Sale, 1,173 sh ($377K)2025-10-06: Sale, 600 sh ($196K)2025-10-06: Sale, 500 sh ($163K)2025-10-06: Sale, 500 sh ($159K)2025-10-06: Sale, 300 sh ($97K)2025-10-06: Sale, 200 sh ($66K)2025-10-06: Sale, 109 sh ($35K)2025-10-06: Conversion, 10,000 sh ($0)2025-10-06: Conversion, 10,000 sh ($0)2025-10-06: Option exercise, 10,000 sh ($0)2025-09-19: Sale, 2,300 sh ($664K)2025-09-19: Sale, 2,300 sh ($662K)2025-09-19: Sale, 2,200 sh ($640K)2025-09-19: Sale, 1,900 sh ($551K)2025-09-19: Conversion, 10,000 sh ($381K)2025-09-19: Sale, 1,300 sh ($373K)2025-09-19: Conversion, 10,000 sh ($0)2025-09-19: Conversion, 10,000 sh ($0)2025-09-19: Option exercise, 10,000 sh ($0)2025-09-05: Sale, 2,100 sh ($563K)2025-09-05: Sale, 1,956 sh ($526K)2025-09-05: Sale, 1,647 sh ($446K)2025-09-05: Sale, 1,600 sh ($432K)2025-09-05: Conversion, 10,000 sh ($381K)2025-09-05: Sale, 1,148 sh ($305K)2025-09-05: Sale, 849 sh ($227K)2025-09-05: Sale, 500 sh ($132K)2025-09-05: Sale, 200 sh ($54K)2025-09-05: Option exercise, 10,000 sh ($0)2025-09-05: Conversion, 10,000 sh ($0)2025-09-05: Conversion, 10,000 sh ($0)2025-08-20: Gift, 10,000 sh ($0)2025-08-20: Conversion, 10,000 sh ($0)2025-08-20: Conversion, 10,000 sh ($0)2025-08-19: Sale, 1,979 sh ($675K)2025-08-19: Sale, 1,700 sh ($578K)2025-08-19: Sale, 1,318 sh ($451K)2025-08-19: Conversion, 10,000 sh ($381K)2025-08-19: Sale, 1,003 sh ($340K)2025-08-19: Sale, 600 sh ($208K)2025-08-19: Sale, 500 sh ($174K)2025-08-19: Sale, 400 sh ($142K)2025-08-19: Sale, 400 sh ($141K)2025-08-19: Sale, 400 sh ($140K)2025-08-19: Sale, 300 sh ($106K)2025-08-19: Sale, 300 sh ($104K)2025-08-19: Sale, 300 sh ($103K)2025-08-19: Sale, 200 sh ($73K)2025-08-19: Sale, 200 sh ($72K)2025-08-19: Sale, 200 sh ($70K)2025-08-19: Sale, 100 sh ($36K)2025-08-19: Sale, 100 sh ($35K)2025-08-19: Conversion, 10,000 sh ($0)2025-08-19: Option exercise, 10,000 sh ($0)2025-08-19: Conversion, 10,000 sh ($0)2025-08-05: Sale, 2,205 sh ($755K)2025-08-05: Sale, 2,098 sh ($714K)2025-08-05: Sale, 1,330 sh ($454K)2025-08-05: Sale, 1,133 sh ($391K)2025-08-05: Conversion, 10,000 sh ($381K)2025-08-05: Sale, 931 sh ($330K)2025-08-05: Sale, 600 sh ($206K)2025-08-05: Sale, 400 sh ($142K)2025-08-05: Sale, 403 sh ($137K)2025-08-05: Sale, 300 sh ($105K)2025-08-05: Sale, 200 sh ($71K)2025-08-05: Sale, 200 sh ($70K)2025-08-05: Sale, 200 sh ($69K)2025-08-05: Conversion, 10,000 sh ($0)2025-08-05: Option exercise, 10,000 sh ($0)2025-08-05: Conversion, 10,000 sh ($0)2025-07-21: Sale, 2,445 sh ($869K)2025-07-21: Sale, 1,580 sh ($576K)2025-07-21: Sale, 1,200 sh ($439K)2025-07-21: Sale, 1,100 sh ($393K)2025-07-21: Conversion, 10,000 sh ($381K)2025-07-21: Sale, 854 sh ($307K)2025-07-21: Sale, 728 sh ($259K)2025-07-21: Sale, 620 sh ($225K)2025-07-21: Sale, 373 sh ($134K)2025-07-21: Sale, 300 sh ($110K)2025-07-21: Sale, 300 sh ($108K)2025-07-21: Sale, 200 sh ($74K)2025-07-21: Sale, 200 sh ($72K)2025-07-21: Sale, 100 sh ($37K)2025-07-21: Option exercise, 10,000 sh ($0)2025-07-21: Conversion, 10,000 sh ($0)2025-07-21: Conversion, 10,000 sh ($0)2025-07-07: Sale, 2,000 sh ($786K)2025-07-07: Sale, 1,741 sh ($680K)2025-07-07: Sale, 1,557 sh ($610K)2025-07-07: Sale, 1,400 sh ($551K)2025-07-07: Sale, 1,202 sh ($476K)2025-07-07: Conversion, 10,000 sh ($381K)2025-07-07: Sale, 800 sh ($316K)2025-07-07: Sale, 600 sh ($238K)2025-07-07: Sale, 500 sh ($194K)2025-07-07: Sale, 200 sh ($77K)2025-07-07: Option exercise, 10,000 sh ($0)2025-07-07: Conversion, 10,000 sh ($0)2025-07-07: Conversion, 10,000 sh ($0)2025-06-20: Sale, 2,183 sh ($1.0M)2025-06-20: Sale, 1,401 sh ($659K)2025-06-20: Sale, 1,199 sh ($565K)2025-06-20: Sale, 1,017 sh ($476K)2025-06-20: Sale, 928 sh ($439K)2025-06-20: Sale, 900 sh ($421K)2025-06-20: Conversion, 10,000 sh ($381K)2025-06-20: Sale, 700 sh ($334K)2025-06-20: Sale, 500 sh ($237K)2025-06-20: Sale, 400 sh ($191K)2025-06-20: Sale, 300 sh ($140K)2025-06-20: Sale, 272 sh ($129K)2025-06-20: Sale, 200 sh ($96K)2025-06-20: Option exercise, 10,000 sh ($0)2025-06-20: Conversion, 10,000 sh ($0)2025-06-20: Conversion, 10,000 sh ($0)2025-06-06: Conversion, 60,000 sh ($0)2025-06-06: Conversion, 60,000 sh ($0)2025-06-06: Gift, 60,000 sh ($0)2025-06-05: Sale, 2,804 sh ($1.5M)2025-06-05: Sale, 1,400 sh ($738K)2025-06-05: Sale, 1,200 sh ($630K)2025-06-05: Sale, 996 sh ($521K)2025-06-05: Sale, 900 sh ($475K)2025-06-05: Conversion, 10,000 sh ($381K)2025-06-05: Sale, 600 sh ($317K)2025-06-05: Sale, 500 sh ($265K)2025-06-05: Sale, 500 sh ($263K)2025-06-05: Sale, 500 sh ($261K)2025-06-05: Sale, 300 sh ($156K)2025-06-05: Sale, 200 sh ($104K)2025-06-05: Sale, 100 sh ($53K)2025-06-05: Conversion, 10,000 sh ($0)2025-06-05: Option exercise, 10,000 sh ($0)2025-06-05: Conversion, 10,000 sh ($0)2025-05-19: Sale, 2,000 sh ($1.1M)2025-05-19: Sale, 1,700 sh ($895K)2025-05-19: Sale, 1,600 sh ($844K)2025-05-19: Sale, 1,509 sh ($784K)2025-05-19: Sale, 874 sh ($456K)2025-05-19: Conversion, 10,000 sh ($381K)2025-05-19: Sale, 700 sh ($367K)2025-05-19: Sale, 600 sh ($317K)2025-05-19: Sale, 517 sh ($270K)2025-05-19: Sale, 300 sh ($156K)2025-05-19: Sale, 100 sh ($53K)2025-05-19: Sale, 100 sh ($52K)2025-05-19: Option exercise, 10,000 sh ($0)2025-05-19: Conversion, 10,000 sh ($0)2025-05-19: Conversion, 10,000 sh ($0)2025-05-05: Sale, 1,640 sh ($813K)2025-05-05: Sale, 1,200 sh ($591K)2025-05-05: Sale, 1,165 sh ($575K)2025-05-05: Sale, 1,003 sh ($503K)2025-05-05: Sale, 1,000 sh ($500K)2025-05-05: Sale, 855 sh ($423K)2025-05-05: Sale, 822 sh ($408K)2025-05-05: Conversion, 10,000 sh ($381K)2025-05-05: Sale, 600 sh ($295K)2025-05-05: Sale, 498 sh ($248K)2025-05-05: Sale, 417 sh ($208K)2025-05-05: Sale, 400 sh ($201K)2025-05-05: Sale, 200 sh ($98K)2025-05-05: Sale, 200 sh ($96K)2025-05-05: Conversion, 10,000 sh ($0)2025-05-05: Option exercise, 10,000 sh ($0)2025-05-05: Conversion, 10,000 sh ($0)2025-04-21: Sale, 2,057 sh ($650K)2025-04-21: Conversion, 10,000 sh ($381K)2025-04-21: Sale, 1,197 sh ($377K)2025-04-21: Sale, 1,200 sh ($372K)2025-04-21: Sale, 1,100 sh ($344K)2025-04-21: Sale, 1,000 sh ($311K)2025-04-21: Sale, 900 sh ($282K)2025-04-21: Sale, 900 sh ($281K)2025-04-21: Sale, 400 sh ($130K)2025-04-21: Sale, 356 sh ($114K)2025-04-21: Sale, 299 sh ($95K)2025-04-21: Sale, 247 sh ($78K)2025-04-21: Sale, 244 sh ($78K)2025-04-21: Sale, 100 sh ($32K)2025-04-21: Conversion, 10,000 sh ($0)2025-04-21: Option exercise, 10,000 sh ($0)2025-04-21: Conversion, 10,000 sh ($0)2025-04-07: Sale, 1,349 sh ($394K)2025-04-07: Conversion, 10,000 sh ($381K)2025-04-07: Sale, 1,200 sh ($353K)2025-04-07: Sale, 1,000 sh ($296K)2025-04-07: Sale, 910 sh ($264K)2025-04-07: Sale, 841 sh ($245K)2025-04-07: Sale, 749 sh ($222K)2025-04-07: Sale, 700 sh ($205K)2025-04-07: Sale, 476 sh ($142K)2025-04-07: Sale, 410 sh ($118K)2025-04-07: Sale, 400 sh ($114K)2025-04-07: Sale, 300 sh ($90K)2025-04-07: Sale, 300 sh ($87K)2025-04-07: Sale, 265 sh ($75K)2025-04-07: Sale, 200 sh ($60K)2025-04-07: Sale, 200 sh ($60K)2025-04-07: Sale, 200 sh ($56K)2025-04-07: Sale, 100 sh ($31K)2025-04-07: Sale, 100 sh ($30K)2025-04-07: Sale, 100 sh ($28K)2025-04-07: Sale, 100 sh ($28K)2025-04-07: Sale, 100 sh ($28K)2025-04-07: Conversion, 10,000 sh ($0)2025-04-07: Option exercise, 10,000 sh ($0)2025-04-07: Conversion, 10,000 sh ($0)2025-03-19: Sale, 1,360 sh ($410K)2025-03-19: Conversion, 9,748 sh ($371K)2025-03-19: Sale, 1,000 sh ($297K)2025-03-19: Sale, 1,000 sh ($295K)2025-03-19: Sale, 904 sh ($274K)2025-03-19: Sale, 900 sh ($272K)2025-03-19: Sale, 900 sh ($269K)2025-03-19: Sale, 800 sh ($238K)2025-03-19: Sale, 800 sh ($237K)2025-03-19: Sale, 700 sh ($210K)2025-03-19: Sale, 500 sh ($145K)2025-03-19: Sale, 474 sh ($139K)2025-03-19: Sale, 310 sh ($91K)2025-03-19: Sale, 252 sh ($73K)2025-03-19: Sale, 100 sh ($30K)2025-03-19: Conversion, 252 sh ($4K)2025-03-19: Option exercise, 9,748 sh ($0)2025-03-19: Conversion, 9,748 sh ($0)2025-03-19: Option exercise, 252 sh ($0)2025-03-19: Conversion, 252 sh ($0)2025-03-19: Conversion, 252 sh ($0)2025-03-19: Conversion, 9,748 sh ($0)2025-03-05: Sale, 1,900 sh ($553K)2025-03-05: Sale, 1,800 sh ($526K)2025-03-05: Sale, 1,500 sh ($435K)2025-03-05: Sale, 1,300 sh ($381K)2025-03-05: Sale, 1,200 sh ($347K)2025-03-05: Sale, 1,100 sh ($315K)2025-03-05: Sale, 600 sh ($176K)2025-03-05: Conversion, 10,000 sh ($144K)2025-03-05: Sale, 500 sh ($144K)2025-03-05: Sale, 100 sh ($29K)2025-03-05: Option exercise, 10,000 sh ($0)2025-03-05: Conversion, 10,000 sh ($0)2025-03-05: Conversion, 10,000 sh ($0)2025-02-19: Sale, 2,702 sh ($1.2M)2025-02-19: Sale, 2,307 sh ($1.0M)2025-02-19: Sale, 1,562 sh ($680K)2025-02-19: Sale, 826 sh ($356K)2025-02-19: Sale, 809 sh ($350K)2025-02-19: Sale, 556 sh ($239K)2025-02-19: Sale, 538 sh ($235K)2025-02-19: Sale, 400 sh ($175K)2025-02-19: Conversion, 10,000 sh ($144K)2025-02-19: Sale, 300 sh ($132K)2025-02-19: Conversion, 10,000 sh ($0)2025-02-19: Option exercise, 10,000 sh ($0)2025-02-19: Conversion, 10,000 sh ($0)2025-02-05: Sale, 3,453 sh ($1.4M)2025-02-05: Sale, 1,513 sh ($589K)2025-02-05: Sale, 1,422 sh ($552K)2025-02-05: Sale, 1,405 sh ($548K)2025-02-05: Sale, 1,109 sh ($434K)2025-02-05: Sale, 300 sh ($116K)2025-02-05: Sale, 200 sh ($81K)2025-02-05: Sale, 200 sh ($81K)2025-02-05: Sale, 198 sh ($80K)2025-02-05: Sale, 100 sh ($41K)2025-02-05: Sale, 100 sh ($40K)2025-02-05: Conversion, 10,000 sh ($0)2025-02-05: Conversion, 10,000 sh ($0)2025-02-05: Option exercise, 10,000 sh ($0)2025-02-05: Conversion, 10,000 sh ($0)2025-01-21: Sale, 2,100 sh ($700K)2025-01-21: Sale, 1,507 sh ($504K)2025-01-21: Sale, 1,338 sh ($451K)2025-01-21: Sale, 914 sh ($304K)2025-01-21: Sale, 874 sh ($293K)2025-01-21: Sale, 686 sh ($227K)2025-01-21: Sale, 481 sh ($162K)2025-01-21: Conversion, 10,000 sh ($144K)2025-01-21: Sale, 400 sh ($132K)2025-01-21: Sale, 400 sh ($132K)2025-01-21: Sale, 400 sh ($131K)2025-01-21: Sale, 300 sh ($102K)2025-01-21: Sale, 300 sh ($98K)2025-01-21: Sale, 200 sh ($69K)2025-01-21: Sale, 100 sh ($34K)2025-01-21: Conversion, 10,000 sh ($0)2025-01-21: Conversion, 10,000 sh ($0)2025-01-21: Option exercise, 10,000 sh ($0)2025-01-06: Sale, 2,300 sh ($767K)2025-01-06: Sale, 1,737 sh ($584K)2025-01-06: Sale, 1,722 sh ($575K)2025-01-06: Sale, 1,541 sh ($517K)2025-01-06: Sale, 758 sh ($258K)2025-01-06: Sale, 742 sh ($252K)2025-01-06: Sale, 400 sh ($135K)2025-01-06: Sale, 300 sh ($102K)2025-01-06: Sale, 200 sh ($69K)2025-01-06: Sale, 100 sh ($35K)2025-01-06: Sale, 100 sh ($34K)2025-01-06: Sale, 100 sh ($34K)2025-01-06: Conversion, 10,000 sh ($0)2025-01-06: Conversion, 10,000 sh ($0)2025-01-06: Conversion, 10,000 sh ($0)2025-01-06: Option exercise, 10,000 sh ($0)2024-12-26: Withheld for tax, 31,770 sh ($10.9M)2024-12-26: Option exercise, 60,000 sh ($0)2024-12-26: Option exercise, 60,000 sh ($0)2024-12-19: Sale, 3,387 sh ($1.1M)2024-12-19: Sale, 2,116 sh ($712K)2024-12-19: Sale, 1,464 sh ($495K)2024-12-19: Sale, 1,455 sh ($491K)2024-12-19: Sale, 552 sh ($184K)2024-12-19: Sale, 380 sh ($129K)2024-12-19: Sale, 300 sh ($102K)2024-12-19: Sale, 200 sh ($69K)2024-12-19: Sale, 146 sh ($50K)2024-12-19: Conversion, 10,000 sh ($0)2024-12-19: Option exercise, 10,000 sh ($0)2024-12-19: Conversion, 10,000 sh ($0)2024-12-19: Conversion, 10,000 sh ($0)2024-12-13: Sale, 13,457 sh ($4.6M)2024-12-13: Sale, 10,414 sh ($3.5M)2024-12-13: Sale, 8,235 sh ($2.8M)2024-12-13: Sale, 4,385 sh ($1.5M)2024-12-13: Sale, 2,000 sh ($685K)2024-12-13: Sale, 1,934 sh ($650K)2024-12-13: Sale, 1,597 sh ($545K)2024-12-13: Sale, 800 sh ($275K)2024-12-13: Sale, 704 sh ($236K)2024-12-13: Sale, 300 sh ($103K)2024-12-13: Conversion, 43,826 sh ($0)2024-12-13: Conversion, 43,826 sh ($0)2024-12-13: Conversion, 43,826 sh ($0)2024-12-13: Option exercise, 43,826 sh ($0)2024-12-12: Sale, 13,867 sh ($4.7M)2024-12-12: Sale, 6,879 sh ($2.3M)2024-12-12: Sale, 6,015 sh ($2.1M)2024-12-12: Sale, 4,922 sh ($1.7M)2024-12-12: Sale, 3,375 sh ($1.2M)2024-12-12: Sale, 2,470 sh ($835K)2024-12-12: Sale, 2,162 sh ($728K)2024-12-12: Sale, 1,562 sh ($537K)2024-12-12: Sale, 269 sh ($93K)2024-12-12: Option exercise, 41,521 sh ($0)2024-12-12: Conversion, 41,521 sh ($0)2024-12-12: Conversion, 41,521 sh ($0)2024-12-12: Conversion, 41,521 sh ($0)2024-12-11: Sale, 39,297 sh ($13.5M)2024-12-11: Sale, 27,536 sh ($9.5M)2024-12-11: Sale, 23,975 sh ($8.3M)2024-12-11: Sale, 17,469 sh ($5.9M)2024-12-11: Sale, 14,026 sh ($4.8M)2024-12-11: Sale, 11,554 sh ($3.9M)2024-12-11: Sale, 8,370 sh ($2.8M)2024-12-11: Sale, 7,683 sh ($2.6M)2024-12-11: Sale, 6,781 sh ($2.3M)2024-12-11: Sale, 4,224 sh ($1.4M)2024-12-11: Sale, 3,992 sh ($1.3M)2024-12-11: Sale, 3,327 sh ($1.1M)2024-12-11: Sale, 2,482 sh ($803K)2024-12-11: Sale, 2,389 sh ($786K)2024-12-11: Sale, 2,257 sh ($735K)2024-12-11: Sale, 2,110 sh ($701K)2024-12-11: Sale, 1,927 sh ($632K)2024-12-11: Sale, 1,700 sh ($552K)2024-12-11: Sale, 1,500 sh ($529K)2024-12-11: Sale, 1,501 sh ($497K)2024-12-11: Sale, 1,311 sh ($443K)2024-12-11: Sale, 1,064 sh ($374K)2024-12-11: Sale, 904 sh ($299K)2024-12-11: Sale, 900 sh ($289K)2024-12-11: Sale, 622 sh ($201K)2024-12-11: Option exercise, 161,000 sh ($0)2024-12-11: Conversion, 188,901 sh ($0)2024-12-11: Conversion, 161,000 sh ($0)2024-12-11: Conversion, 161,000 sh ($0)2024-12-11: Option exercise, 27,901 sh ($0)2024-12-11: Conversion, 27,901 sh ($0)2024-12-11: Conversion, 27,901 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2025-11-19DUOLSale3,089 @ $174.61$539K−79.7% of holding787Form 4
2025-11-19DUOLSale2,009 @ $171.50$345K−25.3% of holding5,917Form 4
2025-11-19DUOLSale1,281 @ $172.39$221K−21.6% of holding4,636Form 4
2025-11-19DUOLSale1,146 @ $169.57$194K−11.4% of holding8,926Form 4
2025-11-19DUOLSale1,000 @ $170.55$171K−11.2% of holding7,926Form 4
2025-11-19DUOLSale760 @ $173.74$132K−16.4% of holding3,876Form 4
2025-11-19DUOLSale435 @ $175.46$76K−55.3% of holding352Form 4
2025-11-19DUOLSale280 @ $176.68$49K−79.5% of holding72Form 4
2025-11-04DUOLSale1,778 @ $261.94$466K−23.2% of holding5,889Form 4
2025-11-04DUOLSale1,727 @ $266.12$460K−58.7% of holding1,217Form 4
2025-11-04DUOLSale1,625 @ $264.06$429K−30.5% of holding3,704Form 4
2025-11-04DUOLSale1,145 @ $266.87$306K−94.1% of holding72Form 4
2025-11-04DUOLSale936 @ $258.77$242K−10.0% of holding8,392Form 4
2025-11-04DUOLSale760 @ $265.02$201K−20.5% of holding2,944Form 4
2025-11-04DUOLSale744 @ $257.92$192K−7.4% of holding9,328Form 4
2025-11-04DUOLSale560 @ $262.97$147K−9.5% of holding5,329Form 4
2025-11-04DUOLSale560 @ $259.71$145K−6.7% of holding7,832Form 4
2025-11-04DUOLSale165 @ $261.14$43K−2.1% of holding7,667Form 4
2025-10-20DUOLSale1,600 @ $316.64$507K−36.7% of holding2,759Form 4
2025-10-20DUOLSale1,281 @ $312.37$400K−17.7% of holding5,959Form 4
2025-10-20DUOLSale1,100 @ $315.79$347K−20.2% of holding4,359Form 4
2025-10-20DUOLSale1,000 @ $311.43$311K−12.1% of holding7,240Form 4
2025-10-20DUOLSale907 @ $318.73$289K−43.6% of holding1,172Form 4
2025-10-20DUOLSale680 @ $317.68$216K−24.6% of holding2,079Form 4
2025-10-20DUOLSale632 @ $309.94$196K−7.1% of holding8,240Form 4
2025-10-20DUOLSale600 @ $307.55$185K−6.0% of holding9,372Form 4
2025-10-20DUOLSale500 @ $313.93$157K−8.4% of holding5,459Form 4
2025-10-20DUOLSale500 @ $309.06$155K−5.3% of holding8,872Form 4
2025-10-20DUOLSale400 @ $321.75$129K−45.9% of holding472Form 4
2025-10-20DUOLSale300 @ $323.09$97K−63.6% of holding172Form 4
2025-10-20DUOLSale300 @ $319.97$96K−25.6% of holding872Form 4
2025-10-20DUOLSale100 @ $324.10$32K−58.1% of holding72Form 4
2025-10-20DUOLSale100 @ $305.86$31K−1.0% of holding9,972Form 4
2025-10-06DUOLSale1,916 @ $318.26$610K−20.0% of holding7,656Form 4
2025-10-06DUOLSale1,803 @ $320.33$578K−29.8% of holding4,254Form 4
2025-10-06DUOLSale1,599 @ $319.56$511K−20.9% of holding6,057Form 4
2025-10-06DUOLSale1,300 @ $327.44$426K−82.7% of holding272Form 4
2025-10-06DUOLSale1,173 @ $321.39$377K−27.6% of holding3,081Form 4
2025-10-06DUOLSale600 @ $326.50$196K−27.6% of holding1,572Form 4
2025-10-06DUOLSale500 @ $325.22$163K−18.7% of holding2,172Form 4
2025-10-06DUOLSale500 @ $317.31$159K−5.0% of holding9,572Form 4
2025-10-06DUOLSale300 @ $324.10$97K−10.1% of holding2,672Form 4
2025-10-06DUOLSale200 @ $328.75$66K−73.5% of holding72Form 4
2025-10-06DUOLSale109 @ $322.62$35K−3.5% of holding2,972Form 4
2025-09-19DUOLSale2,300 @ $288.81$664K−35.5% of holding4,172Form 4
2025-09-19DUOLSale2,300 @ $287.81$662K−26.2% of holding6,472Form 4
2025-09-19DUOLSale2,200 @ $290.78$640K−96.8% of holding72Form 4
2025-09-19DUOLSale1,900 @ $289.79$551K−45.5% of holding2,272Form 4
2025-09-19DUOLSale1,300 @ $286.77$373K−12.9% of holding8,772Form 4
2025-09-05DUOLSale2,100 @ $267.93$563K−27.7% of holding5,475Form 4
2025-09-05DUOLSale1,956 @ $268.92$526K−35.7% of holding3,519Form 4
2025-09-05DUOLSale1,647 @ $271.05$446K−85.8% of holding272Form 4
2025-09-05DUOLSale1,600 @ $269.87$432K−45.5% of holding1,919Form 4
2025-09-05DUOLSale1,148 @ $265.95$305K−12.0% of holding8,424Form 4
2025-09-05DUOLSale849 @ $266.90$227K−10.1% of holding7,575Form 4
2025-09-05DUOLSale500 @ $264.75$132K−5.0% of holding9,572Form 4
2025-09-05DUOLSale200 @ $271.57$54K−73.5% of holding72Form 4
2025-08-19DUOLSale1,979 @ $340.92$675K−26.9% of holding5,390Form 4
2025-08-19DUOLSale1,700 @ $340.03$578K−18.7% of holding7,369Form 4
2025-08-19DUOLSale1,318 @ $342.00$451K−24.5% of holding4,072Form 4
2025-08-19DUOLSale1,003 @ $339.15$340K−10.0% of holding9,069Form 4
2025-08-19DUOLSale600 @ $346.14$208K−17.3% of holding2,872Form 4
2025-08-19DUOLSale500 @ $347.48$174K−17.4% of holding2,372Form 4
2025-08-19DUOLSale400 @ $354.88$142K−41.2% of holding572Form 4
2025-08-19DUOLSale400 @ $351.29$141K−21.4% of holding1,472Form 4
2025-08-19DUOLSale400 @ $348.82$140K−16.9% of holding1,972Form 4
2025-08-19DUOLSale300 @ $354.08$106K−23.6% of holding972Form 4
2025-08-19DUOLSale300 @ $345.02$104K−8.0% of holding3,472Form 4
2025-08-19DUOLSale300 @ $343.82$103K−7.4% of holding3,772Form 4
2025-08-19DUOLSale200 @ $363.05$73K−73.5% of holding72Form 4
2025-08-19DUOLSale200 @ $359.30$72K−42.4% of holding272Form 4
2025-08-19DUOLSale200 @ $352.40$70K−13.6% of holding1,272Form 4
2025-08-19DUOLSale100 @ $357.67$36K−17.5% of holding472Form 4
2025-08-19DUOLSale100 @ $349.28$35K−5.1% of holding1,872Form 4
2025-08-05DUOLSale2,205 @ $342.56$755K−35.3% of holding4,036Form 4
2025-08-05DUOLSale2,098 @ $340.28$714K−21.7% of holding7,571Form 4
2025-08-05DUOLSale1,330 @ $341.55$454K−17.6% of holding6,241Form 4
2025-08-05DUOLSale1,133 @ $344.99$391K−33.0% of holding2,303Form 4
2025-08-05DUOLSale931 @ $354.45$330K−66.4% of holding472Form 4
2025-08-05DUOLSale600 @ $343.43$206K−14.9% of holding3,436Form 4
137 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-05-27DUOLWithheld for tax31,920205,273Form 4
2026-05-27DUOLOption exercise60,000237,193Form 4
2026-05-27DUOLOption exercise60,000210,000Form 4
2026-02-17DUOLWithheld for tax30,594177,193Form 4
2026-02-17DUOLOption exercise60,000270,000Form 4
2026-02-17DUOLOption exercise60,000207,787Form 4
2025-12-08DUOLConversion50,00050,072Form 4
2025-12-08DUOLConversion50,0002,836,917Form 4
2025-12-08DUOLGift50,00072Form 4
2025-12-03DUOLOption exercise5,252147,787Form 4
2025-12-03DUOLOption exercise5,2520Form 4
2025-12-01DUOLWithheld for tax31,770142,535Form 4
2025-12-01DUOLOption exercise60,000330,000Form 4
2025-12-01DUOLOption exercise60,000174,305Form 4
2025-11-19DUOLConversion10,00010,072Form 4
2025-11-19DUOLConversion10,000114,305Form 4
2025-11-19DUOLConversion10,000124,305Form 4
2025-11-19DUOLOption exercise10,0005,252Form 4
2025-11-04DUOLConversion10,00010,072Form 4
2025-11-04DUOLOption exercise10,00015,252Form 4
2025-11-04DUOLConversion10,000114,305Form 4
2025-11-04DUOLConversion10,000124,305Form 4
2025-10-20DUOLWithheld for tax31,770114,305Form 4
2025-10-20DUOLConversion10,00010,072Form 4
2025-10-20DUOLConversion10,00086,075Form 4
2025-10-20DUOLOption exercise10,00025,252Form 4
2025-10-20DUOLConversion10,00096,075Form 4
2025-10-20DUOLOption exercise60,000390,000Form 4
2025-10-20DUOLOption exercise60,000146,075Form 4
2025-10-06DUOLConversion10,00010,072Form 4
2025-10-06DUOLConversion10,00096,075Form 4
2025-10-06DUOLConversion10,00086,075Form 4
2025-10-06DUOLOption exercise10,00035,252Form 4
2025-09-19DUOLConversion10,00010,072Form 4
2025-09-19DUOLConversion10,00096,075Form 4
2025-09-19DUOLConversion10,00086,075Form 4
2025-09-19DUOLOption exercise10,00045,252Form 4
2025-09-05DUOLConversion10,00010,072Form 4
2025-09-05DUOLOption exercise10,00055,252Form 4
2025-09-05DUOLConversion10,00096,075Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.