Insider · CIK 0001870272

Hacker Severin

Reports to the SEC for 1 company · PITTSBURGH, PA

sec.gov

Transactions

Companies

Filings

CIK

0001870272

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-05-27	DUOLDuolingo, Inc. · Performance-Based Restricted Stock UnitsM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−60K sh	—	—	210,000
2026-05-27	DUOLDuolingo, Inc. · Class B Common StockM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	+60K sh	—	—	237,193
2026-05-27	DUOLDuolingo, Inc. · Class B Common StockF Tax Payment	Director, Chief Tech Officer, Co-Founder, 10% Owner	FTax Payment	−31.9K sh	$107.82	−$3.44M	205,273
2026-02-17	DUOLDuolingo, Inc. · Performance-Based Restricted Stock UnitsM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−60K sh	—	—	270,000
2026-02-17	DUOLDuolingo, Inc. · Class B Common StockM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	+60K sh	—	—	207,787
2026-02-17	DUOLDuolingo, Inc. · Class B Common StockF Tax Payment	Director, Chief Tech Officer, Co-Founder, 10% Owner	FTax Payment	−30.6K sh	$112.57	−$3.44M	177,193
2025-12-08	DUOLDuolingo, Inc.C Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+50K sh	—	—	50,072
2025-12-08	DUOLDuolingo, Inc.G Gift	Director, Chief Tech Officer, Co-Founder, 10% Owner	GGift	−50K sh	—	—	72
2025-12-08	DUOLDuolingo, Inc. · Class B Common StockC Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	−50K sh	—	—	2,836,917
2025-12-03	DUOLDuolingo, Inc. · Stock Option (Right to Buy)M Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−5,252 sh	—	—	0
2025-12-03	DUOLDuolingo, Inc. · Class B Common StockM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	+5,252 sh	$38.08	+$200K	147,787
2025-12-01	DUOLDuolingo, Inc. · Performance-Based Restricted Stock UnitsM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−60K sh	—	—	330,000
2025-12-01	DUOLDuolingo, Inc. · Class B Common StockM Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	+60K sh	—	—	174,305
2025-12-01	DUOLDuolingo, Inc. · Class B Common StockF Tax Payment	Director, Chief Tech Officer, Co-Founder, 10% Owner	FTax Payment	−31.8K sh	$185.45	−$5.89M	142,535
2025-11-19	DUOLDuolingo, Inc.C Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+10K sh	$38.08	+$381K	10,072
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,146 sh	$169.57	−$194K	8,926
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,000 sh	$170.55	−$171K	7,926
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−2,009 sh	$171.50	−$345K	5,917
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,281 sh	$172.39	−$221K	4,636
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−760 sh	$173.74	−$132K	3,876
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−3,089 sh	$174.61	−$539K	787
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−435 sh	$175.46	−$76.3K	352
2025-11-19	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−280 sh	$176.68	−$49.5K	72
2025-11-19	DUOLDuolingo, Inc. · Stock Option (Right to Buy)M Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−10K sh	—	—	5,252
2025-11-19	DUOLDuolingo, Inc. · Class B Common StockC Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+10K sh	—	—	124,305
2025-11-19	DUOLDuolingo, Inc. · Class B Common StockC Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	−10K sh	—	—	114,305
2025-11-04	DUOLDuolingo, Inc.C Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+10K sh	$38.08	+$381K	10,072
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−744 sh	$257.92	−$192K	9,328
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−936 sh	$258.77	−$242K	8,392
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−560 sh	$259.71	−$145K	7,832
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−165 sh	$261.14	−$43.1K	7,667
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,778 sh	$261.94	−$466K	5,889
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−560 sh	$262.97	−$147K	5,329
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,625 sh	$264.06	−$429K	3,704
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−760 sh	$265.02	−$201K	2,944
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,727 sh	$266.12	−$460K	1,217
2025-11-04	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,145 sh	$266.87	−$306K	72
2025-11-04	DUOLDuolingo, Inc. · Stock Option (Right to Buy)M Exercise/Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	MExercise/Conversion	−10K sh	—	—	15,252
2025-11-04	DUOLDuolingo, Inc. · Class B Common StockC Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+10K sh	—	—	124,305
2025-11-04	DUOLDuolingo, Inc. · Class B Common StockC Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	−10K sh	—	—	114,305
2025-10-20	DUOLDuolingo, Inc.C Conversion	Director, Chief Tech Officer, Co-Founder, 10% Owner	CConversion	+10K sh	$38.08	+$381K	10,072
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−100 sh	$305.86	−$30.6K	9,972
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−600 sh	$307.55	−$185K	9,372
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−500 sh	$309.06	−$155K	8,872
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−632 sh	$309.94	−$196K	8,240
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,000 sh	$311.43	−$311K	7,240
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,281 sh	$312.37	−$400K	5,959
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−500 sh	$313.93	−$157K	5,459
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,100 sh	$315.79	−$347K	4,359
2025-10-20	DUOLDuolingo, Inc.S Sale	Director, Chief Tech Officer, Co-Founder, 10% Owner	SSale	−1,600 sh	$316.64	−$507K	2,759

Recent filings

Accepted (ET)
May 294
Hacker Severin0001628280-26-039164
SEC(opens sec.gov)
Feb 204
Hacker Severin0001628280-26-009983
SEC(opens sec.gov)
Dec 94
Hacker Severin0001628280-25-056204
SEC(opens sec.gov)
Dec 34
Hacker Severin0001628280-25-055183
SEC(opens sec.gov)
Nov 204
Hacker Severin0001628280-25-053427
SEC(opens sec.gov)

Companies

Duolingo, Inc.Director, Chief Tech Officer, Co-Founder, 10% OwnerDUOL

Address

C/O DUOLINGO, INC. 5900 PENN AVENUE

PITTSBURGH, PA, 15206