Hacker Severin insider trades
Hacker Severin has filed 73 Form 4s with the SEC that we hold, all for Duolingo, Inc. (DUOL), as Chief Tech Officer, Co-Founder, Director, 10% owner. Across all of them we count 0 purchases worth $0 and 486 sales worth $225.1M reported on Form 4. In the last 12 months: 0 purchases ($0) and 33 sales ($7.5M). The largest single trade was a sale of 39,297 shares of Duolingo, Inc. worth $13.5M, dated 2024-12-11. The first filing on our record is dated 2021-08-02 and the latest 2026-05-29.
Duolingo, Inc. (DUOL)
Chief Tech Officer, Co-Founder, Director, 10% owner · 73 filings · 486 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-07-30 | S, sale reported on Form 4 | 50,000 | $5.1M | 2021-08-02 |
| 2021-11-15 | S, sale reported on Form 4 | 1,579 | $223.1K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 3,811 | $534.9K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 1,422 | $198.3K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 2,454 | $339.0K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 314 | $44.8K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 400 | $57.4K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 5,729 | $832.0K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 7,471 | $1.1M | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 2,870 | $424.9K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 2,225 | $327.3K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 225 | $34.0K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 600 | $89.6K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 900 | $135.1K | 2021-11-17 |
| 2021-12-08 | S, sale reported on Form 4 | 36 | $4.0K | 2021-12-10 |
| 2022-06-01 | S, sale reported on Form 4 | 6,113 | $514.2K | 2022-06-03 |
| 2022-06-01 | S, sale reported on Form 4 | 7,321 | $601.5K | 2022-06-03 |
| 2022-06-01 | S, sale reported on Form 4 | 2,059 | $167.4K | 2022-06-03 |
| 2022-06-01 | S, sale reported on Form 4 | 4,507 | $375.2K | 2022-06-03 |
| 2022-06-09 | S, sale reported on Form 4 | 4,418 | $428.9K | 2022-06-13 |
| 2022-06-09 | S, sale reported on Form 4 | 5,180 | $508.1K | 2022-06-13 |
| 2022-06-09 | S, sale reported on Form 4 | 800 | $80.1K | 2022-06-13 |
| 2022-06-09 | S, sale reported on Form 4 | 2,000 | $202.2K | 2022-06-13 |
| 2022-06-09 | S, sale reported on Form 4 | 4,392 | $421.9K | 2022-06-13 |
| 2022-06-09 | S, sale reported on Form 4 | 3,210 | $317.7K | 2022-06-13 |
| 2022-06-16 | S, sale reported on Form 4 | 1,788 | $157.9K | 2022-06-21 |
| 2022-06-16 | S, sale reported on Form 4 | 721 | $64.2K | 2022-06-21 |
| 2022-06-16 | S, sale reported on Form 4 | 1,500 | $135.5K | 2022-06-21 |
| 2022-06-16 | S, sale reported on Form 4 | 8,314 | $760.6K | 2022-06-21 |
| 2022-06-16 | S, sale reported on Form 4 | 300 | $27.9K | 2022-06-21 |
| 2022-06-16 | S, sale reported on Form 4 | 7,377 | $681.3K | 2022-06-21 |
| 2022-06-23 | S, sale reported on Form 4 | 2,987 | $297.6K | 2022-06-27 |
| 2022-06-23 | S, sale reported on Form 4 | 9,008 | $892.2K | 2022-06-27 |
| 2022-06-23 | S, sale reported on Form 4 | 3,962 | $388.6K | 2022-06-27 |
| 2022-06-23 | S, sale reported on Form 4 | 2,243 | $217.7K | 2022-06-27 |
| 2022-06-23 | S, sale reported on Form 4 | 400 | $38.0K | 2022-06-27 |
| 2022-06-23 | S, sale reported on Form 4 | 1,400 | $133.9K | 2022-06-27 |
| 2022-07-01 | S, sale reported on Form 4 | 300 | $26.3K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 1,225 | $116.3K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 764 | $71.1K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 1,103 | $101.2K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 2,430 | $219.1K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 3,207 | $286.8K | 2022-07-05 |
| 2022-07-01 | S, sale reported on Form 4 | 971 | $91.3K | 2022-07-05 |
| 2022-08-01 | S, sale reported on Form 4 | 300 | $28.7K | 2022-08-02 |
| 2022-08-01 | S, sale reported on Form 4 | 4,070 | $386.3K | 2022-08-02 |
| 2022-08-01 | S, sale reported on Form 4 | 3,830 | $360.8K | 2022-08-02 |
| 2022-08-01 | S, sale reported on Form 4 | 1,400 | $130.1K | 2022-08-02 |
| 2022-08-01 | S, sale reported on Form 4 | 400 | $36.6K | 2022-08-02 |
| 2022-09-01 | S, sale reported on Form 4 | 2,701 | $245.9K | 2022-09-06 |
| 2022-09-01 | S, sale reported on Form 4 | 1,039 | $97.1K | 2022-09-06 |
| 2022-09-01 | S, sale reported on Form 4 | 2,828 | $262.5K | 2022-09-06 |
| 2022-09-01 | S, sale reported on Form 4 | 3,432 | $315.4K | 2022-09-06 |
| 2022-10-03 | S, sale reported on Form 4 | 1,908 | $182.5K | 2022-10-04 |
| 2022-10-03 | S, sale reported on Form 4 | 1,000 | $94.5K | 2022-10-04 |
| 2022-10-03 | S, sale reported on Form 4 | 2,404 | $234.7K | 2022-10-04 |
| 2022-10-03 | S, sale reported on Form 4 | 4,688 | $453.7K | 2022-10-04 |
| 2022-11-01 | S, sale reported on Form 4 | 698 | $58.1K | 2022-11-02 |
| 2022-11-01 | S, sale reported on Form 4 | 7,112 | $579.9K | 2022-11-02 |
| 2022-11-01 | S, sale reported on Form 4 | 2,190 | $180.1K | 2022-11-02 |
| 2022-12-14 | S, sale reported on Form 4 | 10,000 | $755.0K | 2022-12-15 |
| 2023-01-09 | S, sale reported on Form 4 | 2,800 | $210.1K | 2023-01-11 |
| 2023-01-10 | S, sale reported on Form 4 | 7,200 | $540.5K | 2023-01-11 |
| 2023-02-01 | S, sale reported on Form 4 | 2,803 | $266.3K | 2023-02-02 |
| 2023-02-01 | S, sale reported on Form 4 | 3,419 | $322.3K | 2023-02-02 |
| 2023-02-01 | S, sale reported on Form 4 | 3,021 | $293.8K | 2023-02-02 |
| 2023-02-01 | S, sale reported on Form 4 | 357 | $35.0K | 2023-02-02 |
| 2023-02-01 | S, sale reported on Form 4 | 400 | $38.5K | 2023-02-02 |
| 2023-03-01 | S, sale reported on Form 4 | 300 | $30.8K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 100 | $10.4K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 1,200 | $126.2K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 1,957 | $217.1K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 445 | $47.8K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 2,825 | $307.0K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 1,572 | $172.7K | 2023-03-02 |
| 2023-03-01 | S, sale reported on Form 4 | 1,601 | $170.1K | 2023-03-02 |
| 2023-04-03 | S, sale reported on Form 4 | 700 | $98.3K | 2023-04-04 |
| 2023-04-03 | S, sale reported on Form 4 | 1,300 | $183.9K | 2023-04-04 |
| 2023-04-03 | S, sale reported on Form 4 | 5,978 | $851.0K | 2023-04-04 |
| 2023-04-03 | S, sale reported on Form 4 | 2,022 | $289.4K | 2023-04-04 |
| 2023-05-01 | S, sale reported on Form 4 | 3,826 | $529.7K | 2023-05-02 |
| 2023-05-01 | S, sale reported on Form 4 | 969 | $133.1K | 2023-05-02 |
| 2023-05-01 | S, sale reported on Form 4 | 1,500 | $204.7K | 2023-05-02 |
| 2023-05-01 | S, sale reported on Form 4 | 3,705 | $515.9K | 2023-05-02 |
| 2023-09-01 | S, sale reported on Form 4 | 200 | $30.5K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 410 | $62.1K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 500 | $75.0K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 3,711 | $553.9K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 3,779 | $560.8K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 400 | $58.4K | 2023-09-06 |
| 2023-09-01 | S, sale reported on Form 4 | 1,000 | $147.3K | 2023-09-06 |
| 2023-10-02 | S, sale reported on Form 4 | 500 | $83.5K | 2023-10-05 |
| 2023-10-02 | S, sale reported on Form 4 | 100 | $16.8K | 2023-10-05 |
| 2023-10-02 | S, sale reported on Form 4 | 4,710 | $780.3K | 2023-10-05 |
| 2023-10-02 | S, sale reported on Form 4 | 3,373 | $556.2K | 2023-10-05 |
| 2023-10-02 | S, sale reported on Form 4 | 1,317 | $215.8K | 2023-10-05 |
| 2023-11-01 | S, sale reported on Form 4 | 3,298 | $483.5K | 2023-11-02 |
| 2023-11-01 | S, sale reported on Form 4 | 1,199 | $177.7K | 2023-11-02 |
| 2023-11-01 | S, sale reported on Form 4 | 1,717 | $253.4K | 2023-11-02 |
| 2023-11-01 | S, sale reported on Form 4 | 3,186 | $464.3K | 2023-11-02 |
Newest 100 of 486
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1870272) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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