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DUOL · Duolingo, Inc.

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys0
Open-market sells26
Research cases0
Last filing2026-10-07

Insider flow: Selling only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-08-17 — Chen Stephen C. · sold 1,024 @ $129.13 2026-08-17 — Meese Robert · sold 1,354 @ $129.13 2026-08-17 — Glance Natalie · sold 2,751 @ $129.13 2026-08-18 — Glance Natalie · sold 1,037 @ $138.19 2026-08-18 — Glance Natalie · sold 502 @ $137.01 2026-09-08 — GORDON WILLIAM B · sold 100 @ $151.64 2026-09-08 — GORDON WILLIAM B · sold 200 @ $148.68 2026-09-08 — GORDON WILLIAM B · sold 2,675 @ $146.58 2026-09-08 — GORDON WILLIAM B · sold 2,742 @ $144.59 2026-09-08 — GORDON WILLIAM B · sold 3,483 @ $145.91 2026-09-08 — GORDON WILLIAM B · sold 800 @ $143.83 2026-09-14 — Chen Stephen C. · sold 2,107 @ $147.43 2026-09-14 — Chen Stephen C. · sold 5,965 @ $150.00 2026-09-16 — von Ahn Luis · sold 27,272 @ $150.17 2026-09-16 — von Ahn Luis · sold 1,020 @ $151.54 2026-09-21 — von Ahn Luis · sold 33,257 @ $150.46 2026-09-21 — von Ahn Luis · sold 4,109 @ $151.07 2026-09-22 — von Ahn Luis · sold 200 @ $150.00 2026-09-22 — von Ahn Luis · sold 3,414 @ $152.02 2026-09-24 — von Ahn Luis · sold 38,758 @ $150.45 2026-09-24 — von Ahn Luis · sold 7,024 @ $151.42 2026-09-24 — von Ahn Luis · sold 900 @ $152.29 2026-10-07 — von Ahn Luis · sold 20,025 @ $150.63 2026-10-07 — von Ahn Luis · sold 55,036 @ $151.52 2026-10-07 — von Ahn Luis · sold 29,871 @ $152.47 2026-10-07 — von Ahn Luis · sold 5,114 @ $153.26
2026-08-172026-10-07

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

von Ahn Luis President & CEO, Co-Founder, Director, 10% owner
GORDON WILLIAM B Director
Chen Stephen C. General Counsel
Glance Natalie Chief Engineering Officer
Meese Robert Chief Business Officer
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $DUOL is the reading of them — and for this company, that is what the list below says it is, no more.

  • Transaction timelineThe [{'transaction_date': '2026-10-07', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 20025.0, 'price': 150.6319, 'value': 3016403.8, 'is_buy': False}, {'transaction_date': '2026-10-07', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 55036.0, 'price': 151.5242, 'value': 8339285.87, 'is_buy': False}, {'transaction_date': '2026-10-07', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 29871.0, 'price': 152.4734, 'value': 4554532.93, 'is_buy': False}, {'transaction_date': '2026-10-07', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 5114.0, 'price': 153.2611, 'value': 783777.27, 'is_buy': False}, {'transaction_date': '2026-09-24', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 38758.0, 'price': 150.45, 'value': 5831141.1, 'is_buy': False}, {'transaction_date': '2026-09-24', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 7024.0, 'price': 151.42, 'value': 1063574.08, 'is_buy': False}, {'transaction_date': '2026-09-24', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 900.0, 'price': 152.29, 'value': 137061.0, 'is_buy': False}, {'transaction_date': '2026-09-22', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 200.0, 'price': 150.0, 'value': 30000.0, 'is_buy': False}, {'transaction_date': '2026-09-22', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 3414.0, 'price': 152.02, 'value': 518996.28, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 33257.0, 'price': 150.46, 'value': 5003848.22, 'is_buy': False}, {'transaction_date': '2026-09-21', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 4109.0, 'price': 151.07, 'value': 620746.63, 'is_buy': False}, {'transaction_date': '2026-09-16', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 27272.0, 'price': 150.1749, 'value': 4095569.87, 'is_buy': False}, {'transaction_date': '2026-09-16', 'insider_name': 'von Ahn Luis', 'insider_title': 'President & CEO, Co-Founder, Director, 10% owner', 'transaction_type': 'Open-market sell', 'shares': 1020.0, 'price': 151.54, 'value': 154570.8, 'is_buy': False}, {'transaction_date': '2026-09-14', 'insider_name': 'Chen Stephen C.', 'insider_title': 'General Counsel', 'transaction_type': 'Open-market sell', 'shares': 2107.0, 'price': 147.43, 'value': 310635.01, 'is_buy': False}, {'transaction_date': '2026-09-14', 'insider_name': 'Chen Stephen C.', 'insider_title': 'General Counsel', 'transaction_type': 'Open-market sell', 'shares': 5965.0, 'price': 150.0, 'value': 894750.0, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 100.0, 'price': 151.64, 'value': 15164.0, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 200.0, 'price': 148.68, 'value': 29736.0, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 2675.0, 'price': 146.58, 'value': 392101.5, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 2742.0, 'price': 144.59, 'value': 396465.78, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 3483.0, 'price': 145.91, 'value': 508204.53, 'is_buy': False}, {'transaction_date': '2026-09-08', 'insider_name': 'GORDON WILLIAM B', 'insider_title': 'Director', 'transaction_type': 'Open-market sell', 'shares': 800.0, 'price': 143.83, 'value': 115064.0, 'is_buy': False}, {'transaction_date': '2026-08-18', 'insider_name': 'Glance Natalie', 'insider_title': 'Chief Engineering Officer', 'transaction_type': 'Open-market sell', 'shares': 1037.0, 'price': 138.19, 'value': 143303.03, 'is_buy': False}, {'transaction_date': '2026-08-18', 'insider_name': 'Glance Natalie', 'insider_title': 'Chief Engineering Officer', 'transaction_type': 'Open-market sell', 'shares': 502.0, 'price': 137.01, 'value': 68779.02, 'is_buy': False}, {'transaction_date': '2026-08-17', 'insider_name': 'Chen Stephen C.', 'insider_title': 'General Counsel', 'transaction_type': 'Open-market sell', 'shares': 1024.0, 'price': 129.13, 'value': 132229.12, 'is_buy': False}, {'transaction_date': '2026-08-17', 'insider_name': 'Meese Robert', 'insider_title': 'Chief Business Officer', 'transaction_type': 'Open-market sell', 'shares': 1354.0, 'price': 129.13, 'value': 174842.02, 'is_buy': False}, {'transaction_date': '2026-08-17', 'insider_name': 'Glance Natalie', 'insider_title': 'Chief Engineering Officer', 'transaction_type': 'Open-market sell', 'shares': 2751.0, 'price': 129.13, 'value': 355236.63, 'is_buy': False}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for DUOL today: no reported open-market purchases in this window, so there is no insider cost basis to compute; no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.