DUOL insider buying and SEC filings, explained
Duolingo, Inc. · CIK 1562088
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Services-Prepackaged Software
- State of incorporation
- DE
- Fiscal year end
- Dec 31
Insider activity in the last 12 months
Bought
$499K
Insiders who bought
1
Sold (not marked 10b5-1)
$833K
Planned sales (10b5-1)
$46.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 7, 2026 | Planned (10b5-1) | Ahn Luis von (CEO and Director) sold 110,046 shares at about $151.70 ($16.7M), marked as a 10b5-1 plan trade. Holdings down 100% to 0 shares. | SEC filing Filed Oct 9, 2026, 4:09 PM ET |
| Sep 24, 2026 | Planned (10b5-1) | Ahn Luis von (CEO and Director) sold 46,682 shares at about $150.63 ($7.0M), marked as a 10b5-1 plan trade. Holdings down 100% to 0 shares. | SEC filing Filed Sep 28, 2026 |
| Sep 21–22, 2026 | Planned (10b5-1) | Ahn Luis von (CEO and Director) sold 40,980 shares between Sep 21 and Sep 22 at about $150.65 ($6.2M), marked as a 10b5-1 plan trade. Holdings down 100% to 0 shares. | SEC filing Filed Sep 23, 2026 |
| Sep 16, 2026 | Planned (10b5-1) | Ahn Luis von (CEO and Director) sold 28,292 shares at about $150.22 ($4.3M), marked as a 10b5-1 plan trade. Holdings down 100% to 0 shares. | SEC filing Filed Sep 18, 2026 |
| Sep 14, 2026 | Planned (10b5-1) | Stephen C. Chen (General Counsel) sold 8,072 shares at about $149.33 ($1.2M), marked as a 10b5-1 plan trade. Holdings down 16% to 43,769 shares. | SEC filing Filed Sep 15, 2026 |
| Sep 8, 2026 | Planned (10b5-1) | William B. Gordon (Director) sold 10,000 shares at about $145.67 ($1.5M), marked as a 10b5-1 plan trade. Holdings down 13% to 68,415 shares. | SEC filing Filed Sep 10, 2026 |
| Aug 17–18, 2026 | Planned (10b5-1) | Natalie Glance (Chief Engineering Officer) sold 4,290 shares between Aug 17 and Aug 18 at about $132.24 ($567K), marked as a 10b5-1 plan trade. Holdings down 2% to 169,111 shares. | SEC filing Filed Aug 19, 2026 |
| Aug 17, 2026 | Sale | Robert Meese (Chief Business Officer) sold 1,354 shares at $129.13 ($175K). Holdings down 1% to 169,391 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Aug 17, 2026 | Sale | Stephen C. Chen (General Counsel) sold 1,024 shares at $129.13 ($132K). Holdings down 2% to 51,841 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| May 15–18, 2026 | Planned (10b5-1) | Stephen C. Chen (General Counsel) sold 2,797 shares between May 15 and May 18 at about $113.18 ($317K), marked as a 10b5-1 plan trade. Holdings down 5% to 52,807 shares. | SEC filing Filed May 19, 2026 |
| May 15–18, 2026 | Planned (10b5-1) | Natalie Glance (Chief Engineering Officer) sold 5,289 shares between May 15 and May 18 at about $113.07 ($598K), marked as a 10b5-1 plan trade. Holdings down 3% to 173,401 shares. | SEC filing Filed May 19, 2026 |
| May 15, 2026 | Sale | Robert Meese (Chief Business Officer) sold 1,420 shares at $112.16 ($159K). Holdings down 1% to 170,745 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 19, 2026 |
| Mar 3, 2026 | Purchase (code P) | James H Shelton (Director) bought 5,000 shares at about $99.76 ($499K), reported as a purchase (code P). Holdings up 108% to 9,632 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 4, 2026 |
| Feb 17, 2026 | Sale | Robert Meese (Chief Business Officer) sold 1,000 shares at $110.06 ($110K). Holdings down 1% to 122,636 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 20, 2026 |
| Feb 17–18, 2026 | Planned (10b5-1) | Matthew Skaruppa (CFO) sold 5,856 shares between Feb 17 and Feb 18 at about $112.42 ($658K), marked as a 10b5-1 plan trade. Holdings down 16% to 31,631 shares. | SEC filing Filed Feb 20, 2026 |
| Feb 17–18, 2026 | Planned (10b5-1) | Stephen C. Chen (General Counsel) sold 2,797 shares between Feb 17 and Feb 18 at about $112.24 ($314K), marked as a 10b5-1 plan trade. Holdings down 8% to 30,545 shares. | SEC filing Filed Feb 20, 2026 |
| Feb 17–18, 2026 | Planned (10b5-1) | Natalie Glance (Chief Engineering Officer) sold 5,286 shares between Feb 17 and Feb 18 at about $112.38 ($594K), marked as a 10b5-1 plan trade. Holdings down 4% to 115,380 shares. | SEC filing Filed Feb 20, 2026 |
| Nov 19, 2025 | Planned (10b5-1) | Severin Hacker (Chief Tech Officer, Co-Founder and Director) sold 10,000 shares at about $172.75 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 99% to 72 shares. | SEC filing Filed Nov 20, 2025 |
| Nov 17–18, 2025 | Planned (10b5-1) | Stephen C. Chen (General Counsel) sold 2,796 shares between Nov 17, 2025 and Nov 18, 2025 at about $176.82 ($494K), marked as a 10b5-1 plan trade. Holdings down 8% to 31,542 shares. | SEC filing Filed Nov 19, 2025 |
| Nov 17–18, 2025 | Planned (10b5-1) | Matthew Skaruppa (CFO) sold 5,858 shares between Nov 17, 2025 and Nov 18, 2025 at about $176.81 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 14% to 37,487 shares. | SEC filing Filed Nov 19, 2025 |
| Nov 17–18, 2025 | Planned (10b5-1) | Natalie Glance (Chief Engineering Officer) sold 5,005 shares between Nov 17, 2025 and Nov 18, 2025 at about $176.88 ($885K), marked as a 10b5-1 plan trade. Holdings down 4% to 111,166 shares. | SEC filing Filed Nov 19, 2025 |
| Nov 17, 2025 | Sale | Robert Meese (Chief Business Officer) sold 1,444 shares at $177.95 ($257K). Holdings down 1% to 123,636 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 18, 2025 |
| Nov 4, 2025 | Planned (10b5-1) | Severin Hacker (Chief Tech Officer, Co-Founder and Director) sold 10,000 shares at about $263.13 ($2.6M), marked as a 10b5-1 plan trade. Holdings down 99% to 72 shares. | SEC filing Filed Nov 6, 2025 |
40 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
| Filed | Items | Tag | Source |
|---|---|---|---|
| Nov 3, 2026, 4:06 PM ET 8-K | Earnings released (Item 2.02) | SEC filing |
Red flags are objective triggers only: the item or form filed, never an opinion.
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