Chen Stephen C. (CIK 1869758) reported 32 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-18). Recent activity: Buy DUOL (58 shares), Buy DUOL (24,411 shares), Sell DUOL (820 shares), Sell DUOL (1,277 shares), Sell DUOL (700 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-18 | Duolingo, Inc. (DUOL) | General Counsel | Buy | 58 | $836 |
| 2026-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Buy | 24,411 | $2.7M |
| 2026-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 820 | $91,971 |
| 2026-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 1,277 | $144,648 |
| 2026-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 700 | $79,955 |
| 2026-05-13 | Duolingo, Inc. (DUOL) | General Counsel | Buy | 648 | $9,344 |
| 2026-02-20 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 896 | $98,614 |
| 2026-02-20 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 821 | $91,812 |
| 2026-02-20 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 480 | $54,696 |
| 2026-02-20 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 520 | $59,566 |
| 2026-02-20 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 80 | $9,238 |
| 2025-12-30 | Duolingo, Inc. (DUOL) | General Counsel | Buy | 1,800 | $25,956 |
| 2025-11-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 1,282 | $228,132 |
| 2025-11-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 120 | $20,876 |
| 2025-11-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 594 | $104,039 |
| 2025-11-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 320 | $56,301 |
| 2025-11-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 480 | $85,051 |
| 2025-09-19 | Duolingo, Inc. (DUOL) | General Counsel | Buy | 1,700 | $24,514 |
| 2025-08-28 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 1,515 | $486,860 |
| 2025-08-18 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 1,282 | $421,816 |
| 2025-08-15 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 750 | $0 |
| 2025-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 1,268 | $665,789 |
| 2025-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 300 | $157,932 |
| 2025-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 300 | $158,283 |
| 2025-05-19 | Duolingo, Inc. (DUOL) | General Counsel | Sell | 467 | $247,160 |
Source: SEC Form 4 filings · as of 2026-06-18