Hacker Severin

Duolingo, Inc. - Class A Common Stock · Chief Tech Officer

Hacker Severin is listed in public filings as director, 10 percent owner, officer: Chief Tech Officer, Co-Founder. This Hacker Severin insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include Duolingo, Inc. - Class A Common Stock (DUOL). Investors use Hacker Severin's insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.

Latest Actions

Company	Holding Value	Last Transaction	Amount	Transaction Price	Current Price
Duolingo, Inc. - Class A Common StockDUOL	--205.3k shares	Grant / ExerciseMay 27, 2026	Disclosure amount unavailable31.9k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--210k shares	Grant / ExerciseMay 27, 2026	Disclosure amount unavailable60k shares	--	--

Insider Trades History

Company	Holding Value	Last Transaction	Amount	Transaction Price	Current Price
Duolingo, Inc. - Class A Common StockDUOL	--177.2k shares	Grant / ExerciseFeb 17, 2026	Disclosure amount unavailable30.6k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--207.8k shares	Grant / ExerciseFeb 17, 2026	Disclosure amount unavailable60k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--72 shares	Grant / ExerciseDec 8, 2025	Disclosure amount unavailable50k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--50.1k shares	Grant / ExerciseDec 8, 2025	Disclosure amount unavailable50k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$05.3k shares	Grant / ExerciseDec 3, 2025	$200.0K5.3k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	--147.8k shares	Grant / ExerciseDec 3, 2025	Disclosure amount unavailable5.3k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--142.5k shares	Grant / ExerciseDec 1, 2025	Disclosure amount unavailable31.8k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--174.3k shares	Grant / ExerciseDec 1, 2025	Disclosure amount unavailable60k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$137k787 shares	SellNov 19, 2025	$539.4K3.1k shares	$174.61	--
Duolingo, Inc. - Class A Common StockDUOL	$200k5.3k shares	Grant / ExerciseNov 19, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$384k10.1k shares	Grant / ExerciseNov 19, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$1.0M5.9k shares	SellNov 19, 2025	$344.5K2k shares	$171.50	--
Duolingo, Inc. - Class A Common StockDUOL	$799k4.6k shares	SellNov 19, 2025	$220.8K1.3k shares	$172.39	--
Duolingo, Inc. - Class A Common StockDUOL	--114.3k shares	Grant / ExerciseNov 19, 2025	Disclosure amount unavailable10k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$1.5M8.9k shares	SellNov 19, 2025	$194.3K1.1k shares	$169.57	--
Duolingo, Inc. - Class A Common StockDUOL	$1.4M7.9k shares	SellNov 19, 2025	$170.5K1k shares	$170.55	--
Duolingo, Inc. - Class A Common StockDUOL	$673k3.9k shares	SellNov 19, 2025	$132.0K760 shares	$173.74	--
Duolingo, Inc. - Class A Common StockDUOL	$62k352 shares	SellNov 19, 2025	$76.3K435 shares	$175.46	--
Duolingo, Inc. - Class A Common StockDUOL	$13k72 shares	SellNov 19, 2025	$49.5K280 shares	$176.68	--
Duolingo, Inc. - Class A Common StockDUOL	$1.5M5.9k shares	SellNov 4, 2025	$465.7K1.8k shares	$261.94	--
Duolingo, Inc. - Class A Common StockDUOL	$324k1.2k shares	SellNov 4, 2025	$459.6K1.7k shares	$266.12	--
Duolingo, Inc. - Class A Common StockDUOL	$978k3.7k shares	SellNov 4, 2025	$429.1K1.6k shares	$264.06	--
Duolingo, Inc. - Class A Common StockDUOL	$384k10.1k shares	Grant / ExerciseNov 4, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$581k15.3k shares	Grant / ExerciseNov 4, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$19k72 shares	SellNov 4, 2025	$305.6K1.1k shares	$266.87	--
Duolingo, Inc. - Class A Common StockDUOL	$2.2M8.4k shares	SellNov 4, 2025	$242.2K936 shares	$258.77	--
Duolingo, Inc. - Class A Common StockDUOL	$780k2.9k shares	SellNov 4, 2025	$201.4K760 shares	$265.02	--
Duolingo, Inc. - Class A Common StockDUOL	--114.3k shares	Grant / ExerciseNov 4, 2025	Disclosure amount unavailable10k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$2.4M9.3k shares	SellNov 4, 2025	$191.9K744 shares	$257.92	--
Duolingo, Inc. - Class A Common StockDUOL	$1.4M5.3k shares	SellNov 4, 2025	$147.3K560 shares	$262.97	--
Duolingo, Inc. - Class A Common StockDUOL	$2.0M7.8k shares	SellNov 4, 2025	$145.4K560 shares	$259.71	--
Duolingo, Inc. - Class A Common StockDUOL	$2.0M7.7k shares	SellNov 4, 2025	$43.1K165 shares	$261.14	--
Duolingo, Inc. - Class A Common StockDUOL	$874k2.8k shares	SellOct 20, 2025	$506.6K1.6k shares	$316.64	--
Duolingo, Inc. - Class A Common StockDUOL	$1.9M6k shares	SellOct 20, 2025	$400.2K1.3k shares	$312.37	--
Duolingo, Inc. - Class A Common StockDUOL	$384k10.1k shares	Grant / ExerciseOct 20, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$962k25.3k shares	Grant / ExerciseOct 20, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$1.4M4.4k shares	SellOct 20, 2025	$347.4K1.1k shares	$315.79	--
Duolingo, Inc. - Class A Common StockDUOL	$2.3M7.2k shares	SellOct 20, 2025	$311.4K1k shares	$311.43	--
Duolingo, Inc. - Class A Common StockDUOL	$374k1.2k shares	SellOct 20, 2025	$289.1K907 shares	$318.73	--
Duolingo, Inc. - Class A Common StockDUOL	$660k2.1k shares	SellOct 20, 2025	$216.0K680 shares	$317.68	--
Duolingo, Inc. - Class A Common StockDUOL	$2.6M8.2k shares	SellOct 20, 2025	$195.9K632 shares	$309.94	--
Duolingo, Inc. - Class A Common StockDUOL	--86.1k shares	Grant / ExerciseOct 20, 2025	Disclosure amount unavailable10k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--114.3k shares	Grant / ExerciseOct 20, 2025	Disclosure amount unavailable31.8k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	--146.1k shares	Grant / ExerciseOct 20, 2025	Disclosure amount unavailable60k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$2.9M9.4k shares	SellOct 20, 2025	$184.5K600 shares	$307.55	--
Duolingo, Inc. - Class A Common StockDUOL	$1.7M5.5k shares	SellOct 20, 2025	$157.0K500 shares	$313.93	--
Duolingo, Inc. - Class A Common StockDUOL	$2.7M8.9k shares	SellOct 20, 2025	$154.5K500 shares	$309.06	--
Duolingo, Inc. - Class A Common StockDUOL	$152k472 shares	SellOct 20, 2025	$128.7K400 shares	$321.75	--
Duolingo, Inc. - Class A Common StockDUOL	$56k172 shares	SellOct 20, 2025	$96.9K300 shares	$323.09	--
Duolingo, Inc. - Class A Common StockDUOL	$279k872 shares	SellOct 20, 2025	$96.0K300 shares	$319.97	--
Duolingo, Inc. - Class A Common StockDUOL	$23k72 shares	SellOct 20, 2025	$32.4K100 shares	$324.10	--
Duolingo, Inc. - Class A Common StockDUOL	$3.1M10k shares	SellOct 20, 2025	$30.6K100 shares	$305.86	--
Duolingo, Inc. - Class A Common StockDUOL	$2.4M7.7k shares	SellOct 6, 2025	$609.8K1.9k shares	$318.26	--
Duolingo, Inc. - Class A Common StockDUOL	$1.4M4.3k shares	SellOct 6, 2025	$577.6K1.8k shares	$320.33	--
Duolingo, Inc. - Class A Common StockDUOL	$1.9M6.1k shares	SellOct 6, 2025	$511.0K1.6k shares	$319.56	--
Duolingo, Inc. - Class A Common StockDUOL	$89k272 shares	SellOct 6, 2025	$425.7K1.3k shares	$327.44	--
Duolingo, Inc. - Class A Common StockDUOL	$384k10.1k shares	Grant / ExerciseOct 6, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$1.3M35.3k shares	Grant / ExerciseOct 6, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$990k3.1k shares	SellOct 6, 2025	$377.0K1.2k shares	$321.39	--
Duolingo, Inc. - Class A Common StockDUOL	$513k1.6k shares	SellOct 6, 2025	$195.9K600 shares	$326.50	--
Duolingo, Inc. - Class A Common StockDUOL	--86.1k shares	Grant / ExerciseOct 6, 2025	Disclosure amount unavailable10k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$706k2.2k shares	SellOct 6, 2025	$162.6K500 shares	$325.22	--
Duolingo, Inc. - Class A Common StockDUOL	$3.0M9.6k shares	SellOct 6, 2025	$158.7K500 shares	$317.31	--
Duolingo, Inc. - Class A Common StockDUOL	$866k2.7k shares	SellOct 6, 2025	$97.2K300 shares	$324.10	--
Duolingo, Inc. - Class A Common StockDUOL	$24k72 shares	SellOct 6, 2025	$65.8K200 shares	$328.76	--
Duolingo, Inc. - Class A Common StockDUOL	$959k3k shares	SellOct 6, 2025	$35.2K109 shares	$322.62	--
Duolingo, Inc. - Class A Common StockDUOL	$1.2M4.2k shares	SellSep 19, 2025	$664.3K2.3k shares	$288.81	--
Duolingo, Inc. - Class A Common StockDUOL	$1.9M6.5k shares	SellSep 19, 2025	$662.0K2.3k shares	$287.81	--
Duolingo, Inc. - Class A Common StockDUOL	$21k72 shares	SellSep 19, 2025	$639.7K2.2k shares	$290.78	--
Duolingo, Inc. - Class A Common StockDUOL	$658k2.3k shares	SellSep 19, 2025	$550.6K1.9k shares	$289.79	--
Duolingo, Inc. - Class A Common StockDUOL	$384k10.1k shares	Grant / ExerciseSep 19, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$1.7M45.3k shares	Grant / ExerciseSep 19, 2025	$380.8K10k shares	$38.08	--
Duolingo, Inc. - Class A Common StockDUOL	$2.5M8.8k shares	SellSep 19, 2025	$372.8K1.3k shares	$286.77	--
Duolingo, Inc. - Class A Common StockDUOL	--86.1k shares	Grant / ExerciseSep 19, 2025	Disclosure amount unavailable10k shares	--	--
Duolingo, Inc. - Class A Common StockDUOL	$1.5M5.5k shares	SellSep 5, 2025	$562.7K2.1k shares	$267.93	--
Duolingo, Inc. - Class A Common StockDUOL	$946k3.5k shares	SellSep 5, 2025	$526.0K2k shares	$268.92	--
Duolingo, Inc. - Class A Common StockDUOL	$74k272 shares	SellSep 5, 2025	$446.4K1.6k shares	$271.05	--
Duolingo, Inc. - Class A Common StockDUOL	$518k1.9k shares	SellSep 5, 2025	$431.8K1.6k shares	$269.87	--