Dudediligence.

Duolingo, Inc

DUOLNASDAQ · Services-Prepackaged Software
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$37.8M

33 notices · 255,242 sh

Oct 2025 to Oct 2026

Reported ·

$12.9M

74 sales · 1 buy · $498,800 bought

Oct 2025 to Jun 2026

The two figures cover different periods.

71 of 74 reported sales carry the 10b5-1 box.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-09-24: LUIS VON AHN ARELLANO, Form 1442026-09-22: LUIS VON AHN ARELLANO, Form 1442026-09-21: LUIS VON AHN FOUNDATION, Form 1442026-09-21: LUIS VON AHN ARELLANO, Form 1442026-09-16: LUIS VON AHN ARELLANO, Form 1442026-09-16: LUIS VON AHN FOUNDATION, Form 1442026-09-14: STEPHEN CHEN, Form 1442026-09-08: WILLIAM B. GORDON, Form 1442026-08-18: NATALIE GLANCE, Form 1442026-08-17: STEPHEN CHEN, Form 1442026-08-17: NATALIE GLANCE, Form 1442026-08-17: ROBERT MEESE, Form 1442026-05-18: NATALIE GLANCE, Form 1442026-05-18: STEPHEN CHEN, Form 1442026-05-15: ROBERT MEESE, Form 1442026-05-15: STEPHEN CHEN, Form 1442026-05-15: NATALIE GLANCE, Form 1442026-02-18: STEPHEN CHEN, Form 1442026-02-18: MATTHEW SKARUPPA, Form 1442026-02-18: NATALIE GLANCE, Form 1442026-02-17: MATTHEW SKARUPPA, Form 1442026-02-17: NATALIE GLANCE, Form 1442026-02-17: STEPHEN CHEN, Form 1442026-02-17: ROBERT MEESE, Form 1442025-12-12: THE SEVERIN HACKER FOUNDATIONC/O PHILIP BARTELS, Form 1442025-11-18: MATTHEW SKARUPPA, Form 1442025-11-18: STEPHEN CHEN, Form 1442025-11-18: NATALIE GLANCE, Form 1442025-11-17: ROBERT MEESE, Form 1442025-11-17: NATALIE GLANCE, Form 1442025-11-17: STEPHEN CHEN, Form 1442025-11-17: MATTHEW SKARUPPA, Form 1442025-10-08: LUIS VON AHN FOUNDATION, Form 1442025-10-20: Hacker Severin, sold2025-11-04: Hacker Severin, sold2025-11-17: Meese Robert, sold2025-11-17: Glance Natalie, sold2025-11-17: Skaruppa Matthew, sold2025-11-17: Chen Stephen C., sold2025-11-19: Hacker Severin, sold2026-02-17: Glance Natalie, sold2026-02-17: Chen Stephen C., sold2026-02-17: Skaruppa Matthew, sold2026-02-17: Meese Robert, sold2026-03-03: Shelton James H, bought2026-05-15: Meese Robert, sold2026-05-15: Glance Natalie, sold2026-05-15: Chen Stephen C., sold
under a no plan named▼ sale▲ buysize is dollars

Form 144 notices, newest first

2026-09-24LUIS VON AHN ARELLANO, President & CEO, Co-Founder$6,814,638
46,682 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-22LUIS VON AHN ARELLANO, President & CEO, Co-Founder$540,004
3,614 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-21LUIS VON AHN FOUNDATION, Director, Officer, 10% Stockholder$4,965,365
34,992 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-21LUIS VON AHN ARELLANO, President & CEO, Co-Founder$5,302,235
37,366 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-16LUIS VON AHN ARELLANO, President & CEO, Co-Founder$4,354,705
28,292 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-16LUIS VON AHN FOUNDATION, Director, Officer, 10% Stockholder$2,925,711
19,008 shplan 2026-06-02Form 4s on file end Jun 23144 ↗
2026-09-14STEPHEN CHEN, General Counsel$1,159,785
8,072 shplan 2026-06-14Form 4s on file end Jun 23144 ↗
2026-09-08WILLIAM B. GORDON, Director$3,089,200
20,000 shplan 2026-06-09Form 4s on file end Jun 23144 ↗
2026-08-18NATALIE GLANCE, Chief Engineering Officer$200,316
1,539 shplan 2025-09-15Form 4s on file end Jun 23144 ↗
2026-08-17STEPHEN CHEN, General Counsel$132,230
1,024 shplan 2026-06-14Form 4s on file end Jun 23144 ↗
2026-08-17NATALIE GLANCE, Chief Engineering Officer$355,240
2,751 shplan 2025-09-15Form 4s on file end Jun 23144 ↗
2026-08-17ROBERT MEESE, Chief Business Officer$174,844
1,354 shno plan dateForm 4s on file end Jun 23144 ↗
2026-05-18NATALIE GLANCE, Chief Engineering Officer$376,522
3,360 shplan 2025-09-15Form 4s on file end Jun 23144 ↗
2026-05-18STEPHEN CHEN, General Counsel$221,543
1,977 shplan 2025-05-27Form 4s on file end Jun 23144 ↗
2026-05-15ROBERT MEESE, Chief Business Officer$159,260
1,420 shno plan date144 ↗
Form 4, 2026-05-19: sold 1,420 at $112.16 Form 4 ↗
2026-05-15STEPHEN CHEN, General Counsel$91,967
820 sh10b5-1 plan144 ↗
Form 4, 2026-05-19: sold 2,797 at $113.18 Form 4 ↗
2026-05-15NATALIE GLANCE, Chief Engineering Officer$216,347
1,929 shplan 2025-09-15144 ↗
Form 4, 2026-05-19: sold 5,289 at $113.07 Form 4 ↗
2026-02-18STEPHEN CHEN, General Counsel$213,064
1,901 shplan 2025-05-27no Form 4 on file144 ↗
2026-02-18MATTHEW SKARUPPA, Chief Financial Officer$446,751
3,986 shplan 2025-05-27no Form 4 on file144 ↗
2026-02-18NATALIE GLANCE, Chief Engineering Officer$397,324
3,545 shplan 2025-09-15no Form 4 on file144 ↗
2026-02-17MATTHEW SKARUPPA, Chief Financial Officer$205,813
1,870 sh10b5-1 plan144 ↗
Form 4, 2026-02-20: sold 5,856 at $112.42 Form 4 ↗
2026-02-17NATALIE GLANCE, Chief Engineering Officer$191,616
1,741 shplan 2025-09-15144 ↗
Form 4, 2026-02-20: sold 5,286 at $112.38 Form 4 ↗
2026-02-17STEPHEN CHEN, General Counsel$98,614
896 sh10b5-1 plan144 ↗
Form 4, 2026-02-20: sold 2,797 at $112.24 Form 4 ↗
2026-02-17ROBERT MEESE, Chief Business Officer$110,061
1,000 shno plan date144 ↗
Form 4, 2026-02-20: sold 1,000 at $110.06 Form 4 ↗
2025-12-12THE SEVERIN HACKER FOUNDATIONC/O PHILIP BARTELS, Director, Officer, 10% Stockholder$2,009,600
10,000 shplan 2025-09-12no Form 4 on file144 ↗
2025-11-18MATTHEW SKARUPPA, Chief Financial Officer$545,328
3,059 shplan 2025-05-27no Form 4 on file144 ↗
2025-11-18STEPHEN CHEN, General Counsel$269,901
1,514 shplan 2025-05-27no Form 4 on file144 ↗
2025-11-18NATALIE GLANCE, Chief Engineering Officer$440,505
2,471 shplan 2024-11-14no Form 4 on file144 ↗
2025-11-17ROBERT MEESE, Chief Business Officer$256,963
1,444 shno plan date144 ↗
Form 4, 2025-11-18: sold 1,444 at $177.95 Form 4 ↗
2025-11-17NATALIE GLANCE, Chief Engineering Officer$450,932
2,534 shplan 2025-09-15144 ↗
Form 4, 2025-11-19: sold 5,005 at $176.88 Form 4 ↗
2025-11-17STEPHEN CHEN, General Counsel$228,135
1,282 sh10b5-1 plan144 ↗
Form 4, 2025-11-19: sold 2,796 at $176.82 Form 4 ↗
2025-11-17MATTHEW SKARUPPA, Chief Financial Officer$498,089
2,799 sh10b5-1 plan144 ↗
Form 4, 2025-11-19: sold 5,858 at $176.81 Form 4 ↗
2025-10-08LUIS VON AHN FOUNDATION, Director, Officer, 10% Stockholder$319,980
1,000 shplan 2025-06-11no Form 4 on file144 ↗