Hacker Severin — SEC Form 4 filings
SEC reporting owner CIK 1870272. 45 Form 4 filings on record with FilingPulse; latest filed 2026-05-29.
Transaction summary — filings shown
Covers all 45 filings on record, filed 2024-02-05 to 2026-05-29. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 369 legs across 33 filings — 574,248 shares, $188,453,615 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 163.
- Largest priced transaction: sale of 39,297 shares @ $342.48 ($13,458,275) in Duolingo, Inc., filed 2024-12-13.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Duolingo, Inc. (DUOL) | Chief Tech Officer, Co-Founder, Director, 10% owner | 45 | — | 369 legs · 574,248 sh · $188,453,615 | 163 |
Form 4 filings — Hacker Severin
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-29 | 4 | Duolingo, Inc. (DUOL) | Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 60,000 (derivative) @ $0 · Tax withholding (F): 31,920 (derivative) @ $107.82 | EDGAR |
| 2026-02-20 | 4 | Duolingo, Inc. (DUOL) | Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 60,000 (derivative) @ $0 · Tax withholding (F): 30,594 (derivative) @ $112.57 | EDGAR |
| 2025-12-09 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 50,000 @ $0 · Gift (G): 50,000 @ $0 · Conversion (C): 50,000 (derivative) @ $0 | EDGAR |
| 2025-12-03 | 4 | Duolingo, Inc. (DUOL) | Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 60,000 (derivative) @ $0 · Tax withholding (F): 31,770 (derivative) @ $185.45 · Option exercise (M): 5,252 (derivative) @ $0 · Option exercise (M): 5,252 (derivative) @ $38.08 | EDGAR |
| 2025-11-20 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 1,146 @ $169.57 · Sale (S): 1,000 @ $170.55 · Sale (S): 2,009 @ $171.50 · Sale (S): 1,281 @ $172.39 · Sale (S): 760 @ $173.74 · +6 more | EDGAR |
| 2025-11-06 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 744 @ $257.92 · Sale (S): 936 @ $258.77 · Sale (S): 560 @ $259.71 · Sale (S): 165 @ $261.14 · Sale (S): 1,778 @ $261.94 · +8 more | EDGAR |
| 2025-10-22 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 100 @ $305.86 · Sale (S): 600 @ $307.55 · Sale (S): 500 @ $309.06 · Sale (S): 632 @ $309.94 · Sale (S): 1,000 @ $311.43 · +16 more | EDGAR |
| 2025-10-07 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 500 @ $317.31 · Sale (S): 1,916 @ $318.26 · Sale (S): 1,599 @ $319.56 · Sale (S): 1,803 @ $320.33 · Sale (S): 1,173 @ $321.39 · +9 more | EDGAR |
| 2025-09-22 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 1,300 @ $286.77 · Sale (S): 2,300 @ $287.81 · Sale (S): 2,300 @ $288.81 · Sale (S): 1,900 @ $289.79 · Sale (S): 2,200 @ $290.78 · +3 more | EDGAR |
| 2025-09-09 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 500 @ $264.75 · Sale (S): 1,148 @ $265.95 · Sale (S): 849 @ $266.90 · Sale (S): 2,100 @ $267.93 · Sale (S): 1,956 @ $268.92 · +6 more | EDGAR |
| 2025-08-22 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Gift (G): 10,000 @ $0 · Conversion (C): 10,000 (derivative) @ $0 | EDGAR |
| 2025-08-21 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 1,003 @ $339.15 · Sale (S): 1,700 @ $340.03 · Sale (S): 1,979 @ $340.92 · Sale (S): 1,318 @ $342.00 · Sale (S): 300 @ $343.82 · +15 more | EDGAR |
| 2025-08-07 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 403 @ $339.32 · Sale (S): 2,098 @ $340.28 · Sale (S): 1,330 @ $341.55 · Sale (S): 2,205 @ $342.56 · Sale (S): 600 @ $343.43 · +10 more | EDGAR |
| 2025-07-22 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 2,445 @ $355.31 · Sale (S): 728 @ $356.20 · Sale (S): 1,100 @ $357.47 · Sale (S): 300 @ $358.39 · Sale (S): 854 @ $359.65 · +11 more | EDGAR |
| 2025-07-09 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 200 @ $386.90 · Sale (S): 500 @ $388.56 · Sale (S): 1,741 @ $390.83 · Sale (S): 1,557 @ $391.71 · Sale (S): 2,000 @ $392.76 · +7 more | EDGAR |
| 2025-06-23 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 300 @ $466.43 · Sale (S): 900 @ $467.46 · Sale (S): 1,017 @ $468.40 · Sale (S): 2,183 @ $469.55 · Sale (S): 1,401 @ $470.39 · +10 more | EDGAR |
| 2025-06-10 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 60,000 @ $0 · Gift (G): 60,000 @ $0 · Conversion (C): 60,000 (derivative) @ $0 | EDGAR |
| 2025-06-09 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 300 @ $519.15 · Sale (S): 200 @ $520.05 · Sale (S): 500 @ $521.60 · Sale (S): 996 @ $522.77 · Sale (S): 2,804 @ $523.78 · +10 more | EDGAR |
| 2025-05-20 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 100 @ $517.74 · Sale (S): 1,509 @ $519.78 · Sale (S): 300 @ $521.11 · Sale (S): 874 @ $522.05 · Sale (S): 517 @ $523.07 · +9 more | EDGAR |
| 2025-05-07 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 200 @ $480.97 · Sale (S): 200 @ $488.95 · Sale (S): 600 @ $491.44 · Sale (S): 1,200 @ $492.63 · Sale (S): 1,165 @ $493.87 · +11 more | EDGAR |
| 2025-04-23 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 1,200 @ $309.73 · Sale (S): 1,000 @ $310.58 · Sale (S): 900 @ $311.84 · Sale (S): 1,100 @ $312.74 · Sale (S): 900 @ $313.86 · +11 more | EDGAR |
| 2025-04-09 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $38.08 · Sale (S): 100 @ $276.80 · Sale (S): 200 @ $278.20 · Sale (S): 100 @ $279.80 · Sale (S): 265 @ $281.84 · Sale (S): 100 @ $283.95 · +19 more | EDGAR |
| 2025-03-21 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 252 @ $14.42 · Conversion (C): 9,748 @ $38.08 · Sale (S): 500 @ $289.15 · Sale (S): 252 @ $289.94 · Sale (S): 310 @ $293.22 · Sale (S): 474 @ $294.00 · +16 more | EDGAR |
| 2025-03-06 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $14.42 · Sale (S): 1,100 @ $286.16 · Sale (S): 500 @ $287.75 · Sale (S): 1,200 @ $288.95 · Sale (S): 1,500 @ $289.98 · Sale (S): 1,900 @ $291.00 · +7 more | EDGAR |
| 2025-02-21 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $14.42 · Sale (S): 556 @ $430.37 · Sale (S): 826 @ $431.19 · Sale (S): 809 @ $432.37 · Sale (S): 2,702 @ $433.22 · Sale (S): 2,307 @ $434.20 · +7 more | EDGAR |
| 2025-02-06 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 300 @ $386.68 · Sale (S): 1,422 @ $388.01 · Sale (S): 1,513 @ $388.96 · Sale (S): 1,405 @ $389.91 · Sale (S): 1,109 @ $391.01 · +9 more | EDGAR |
| 2025-01-23 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $14.42 · Sale (S): 300 @ $327.06 · Sale (S): 400 @ $327.62 · Sale (S): 400 @ $329.24 · Sale (S): 400 @ $330.39 · Sale (S): 686 @ $331.08 · +12 more | EDGAR |
| 2025-01-07 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 2,300 @ $333.34 · Sale (S): 1,722 @ $334.18 · Sale (S): 1,541 @ $335.40 · Sale (S): 1,737 @ $336.45 · Sale (S): 400 @ $337.13 · +10 more | EDGAR |
| 2025-01-03 | 4 | Duolingo, Inc. (DUOL) | Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 60,000 (derivative) @ $0 · Tax withholding (F): 31,770 (derivative) @ $341.88 | EDGAR |
| 2024-12-20 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 552 @ $334.21 · Sale (S): 3,387 @ $335.34 · Sale (S): 2,116 @ $336.54 · Sale (S): 1,455 @ $337.40 · Sale (S): 1,464 @ $338.28 · +7 more | EDGAR |
| 2024-12-16 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 43,826 @ $0 · Sale (S): 704 @ $335.14 · Sale (S): 1,934 @ $336.26 · Sale (S): 8,235 @ $337.33 · Sale (S): 13,457 @ $338.13 · Sale (S): 10,414 @ $339.15 · +8 more | EDGAR |
| 2024-12-13 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 188,901 @ $0 · Sale (S): 900 @ $321.29 · Sale (S): 622 @ $322.73 · Sale (S): 2,482 @ $323.40 · Sale (S): 1,700 @ $324.88 · Sale (S): 2,257 @ $325.71 · +26 more | EDGAR |
| 2024-12-13 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 41,521 @ $0 · Sale (S): 2,162 @ $336.91 · Sale (S): 2,470 @ $337.97 · Sale (S): 6,879 @ $338.87 · Sale (S): 13,867 @ $339.67 · Sale (S): 4,922 @ $340.96 · +7 more | EDGAR |
| 2024-12-02 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 3,000 @ $0 · Gift (G): 3,000 @ $0 · Conversion (C): 3,000 (derivative) @ $0 | EDGAR |
| 2024-11-27 | 4/A | Duolingo, Inc. (DUOL) | Tax withholding (F): 15,885 (derivative) @ $351.97 | EDGAR |
| 2024-11-26 | 4 | Duolingo, Inc. (DUOL) | Option exercise (M): 30,000 (derivative) @ $0 · Tax withholding (F): 14,115 (derivative) @ $351.97 | EDGAR |
| 2024-08-26 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 15,000 @ $0 · Gift (G): 15,000 @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-08-02 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 900 @ $163.58 · Sale (S): 4,600 @ $164.49 · Sale (S): 400 @ $165.96 · Sale (S): 700 @ $166.95 · Sale (S): 899 @ $168.12 · +5 more | EDGAR |
| 2024-07-02 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 2,887 @ $195.56 · Sale (S): 1,313 @ $196.56 · Sale (S): 800 @ $198.18 · Sale (S): 1,282 @ $199.81 · Sale (S): 2,159 @ $200.56 · +5 more | EDGAR |
| 2024-06-05 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 1,600 @ $192.50 · Sale (S): 1,799 @ $193.44 · Sale (S): 600 @ $194.51 · Sale (S): 300 @ $195.86 · Sale (S): 1,204 @ $196.96 · +5 more | EDGAR |
| 2024-05-03 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 1,200 @ $219.49 · Sale (S): 2,491 @ $220.46 · Sale (S): 809 @ $221.51 · Sale (S): 1,200 @ $222.82 · Sale (S): 1,100 @ $223.67 · +8 more | EDGAR |
| 2024-04-02 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 1,800 @ $216.65 · Sale (S): 2,020 @ $217.70 · Sale (S): 3,653 @ $218.66 · Sale (S): 1,898 @ $219.67 · Sale (S): 629 @ $220.58 · +1 more | EDGAR |
| 2024-03-15 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Gift (G): 10,000 @ $0 · Conversion (C): 10,000 (derivative) @ $0 | EDGAR |
| 2024-03-04 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 600 @ $231.98 · Sale (S): 963 @ $233.29 · Sale (S): 2,449 @ $234.44 · Sale (S): 3,000 @ $235.42 · Sale (S): 1,888 @ $236.31 · +2 more | EDGAR |
| 2024-02-05 | 4 | Duolingo, Inc. (DUOL) | Conversion (C): 10,000 @ $0 · Sale (S): 700 @ $175.67 · Sale (S): 1,630 @ $176.66 · Sale (S): 2,300 @ $177.69 · Sale (S): 859 @ $178.70 · Sale (S): 2,644 @ $179.81 · +3 more | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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