Insider Trading
Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.
| Ticker | Insider | Title | Date | Transaction | Price ($) | Shares | Value ($) | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| DUOL | Shelton James H | Director | 10/10/2026 | Zuteilung | 149.92 | 100 | 14,992 | Form 4 |
| DUOL | Schlosser Mario | Director | 10/10/2026 | Zuteilung | 149.92 | 116 | 17,391 | Form 4 |
| DUOL | Lilly III John Osborne | Director | 10/10/2026 | Zuteilung | 149.92 | 98 | 14,692 | Form 4 |
| DUOL | Bohutinsky Amy | Director | 10/10/2026 | Zuteilung | 149.92 | 108 | 16,191 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 10/07/2026 | Verkauf | 153.26 | 5,114 | 783,777 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 10/07/2026 | Verkauf | 152.47 | 29,871 | 4,554,533 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 10/07/2026 | Verkauf | 151.52 | 55,036 | 8,339,286 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 10/07/2026 | Verkauf | 150.63 | 20,025 | 3,016,404 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 10/07/2026 | Wandlung | 38.08 | 110,046 | 4,190,552 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/24/2026 | Verkauf | 152.29 | 900 | 137,061 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/24/2026 | Verkauf | 151.42 | 7,024 | 1,063,588 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/24/2026 | Verkauf | 150.45 | 38,758 | 5,831,145 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/24/2026 | Wandlung | 38.08 | 46,682 | 1,777,651 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/22/2026 | Verkauf | 152.02 | 3,414 | 518,996 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/22/2026 | Verkauf | 150.00 | 200 | 30,000 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/22/2026 | Wandlung | 38.08 | 3,614 | 137,621 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/21/2026 | Verkauf | 151.07 | 4,109 | 620,746 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/21/2026 | Verkauf | 150.46 | 33,257 | 5,003,985 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/21/2026 | Wandlung | 38.08 | 9,406 | 358,180 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/21/2026 | Wandlung | 14.42 | 27,960 | 403,183 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/16/2026 | Verkauf | 151.54 | 1,020 | 154,571 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/16/2026 | Verkauf | 150.17 | 27,272 | 4,095,570 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/16/2026 | Wandlung | 38.08 | 5,252 | 199,996 | Form 4 |
| DUOL | von Ahn Luis | President & CEO, Co-Founder | 09/16/2026 | Wandlung | 14.42 | 23,040 | 332,237 | Form 4 |
| DUOL | Chen Stephen C. | General Counsel | 09/14/2026 | Verkauf | 150.00 | 5,965 | 894,750 | Form 4 |
| DUOL | Chen Stephen C. | General Counsel | 09/14/2026 | Verkauf | 147.43 | 2,107 | 310,635 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 151.64 | 100 | 15,164 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 148.68 | 200 | 29,735 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 146.58 | 2,675 | 392,114 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 145.91 | 3,483 | 508,198 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 144.59 | 2,742 | 396,458 | Form 4 |
| DUOL | Gordon William B | Director | 09/08/2026 | Verkauf | 143.83 | 800 | 115,068 | Form 4 |
| DUOL | Glance Natalie | Chief Engineering Officer | 08/18/2026 | Verkauf | 138.19 | 1,037 | 143,300 | Form 4 |
| DUOL | Glance Natalie | Chief Engineering Officer | 08/18/2026 | Verkauf | 137.01 | 502 | 68,779 | Form 4 |
| DUOL | Glance Natalie | Chief Engineering Officer | 08/17/2026 | Verkauf | 129.13 | 2,751 | 355,237 | Form 4 |
| DUOL | Meese Robert | Chief Business Officer | 08/17/2026 | Verkauf | 129.13 | 1,354 | 174,842 | Form 4 |
| DUOL | Chen Stephen C. | General Counsel | 08/17/2026 | Verkauf | 129.13 | 1,024 | 132,229 | Form 4 |
| DUOL | Krawcheck Sallie | Director | 08/10/2026 | Zuteilung | — | 3,280 | — | Form 4 |
| DUOL | Krawcheck Sallie | Director | 08/10/2026 | Zuteilung | — | 1,312 | — | Form 4 |
| DUOL | Shelton James H | Director | 07/10/2026 | Zuteilung | 124.76 | 120 | 14,971 | Form 4 |
| DUOL | Bohutinsky Amy | Director | 07/10/2026 | Zuteilung | 124.76 | 130 | 16,219 | Form 4 |
| DUOL | Schlosser Mario | Director | 07/10/2026 | Zuteilung | 124.76 | 140 | 17,466 | Form 4 |
| DUOL | Lilly III John Osborne | Director | 07/10/2026 | Zuteilung | 124.76 | 118 | 14,722 | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).