Severin Hacker

Insider Reports History

Reporting-owner location: Pittsburgh, PA
Latest reporting-owner signature: /s/ Stephen Chen, as Attorney-in-Fact for Severin Hacker
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Severin Hacker

Form 4 holding Chief Tech Officer, Co-Founder, Director, 10%+ Owner

Duolingo, Inc.

Security class: Class B Common Stock
Shares / value: 2,836,917
Estimated value: $298,301,822
Report date: 27 May 2026
Price: $105.15
Ownership: Indirect
Underlying class: Class A Common Stock
Underlying amount: 2,836,917

Form 4 holding Chief Tech Officer, Co-Founder, Director, 10%+ Owner

Duolingo, Inc.

Security class: Performance-Based Restricted Stock Units
Shares / value: 210,000
Estimated value: $153,846,000
Report date: 27 May 2026
Price: $341.88
Ownership: Direct
Underlying class: Class B Common Stock
Underlying amount

Form 4 holding Chief Tech Officer, Co-Founder, Director, 10%+ Owner

Duolingo, Inc.

Security class: Class B Common Stock
Shares / value: 205,273
Estimated value: $21,584,455
Report date: 27 May 2026
Price: $105.15
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 205,273

Form 4 holding Chief Tech Officer, Co-Founder, Director, 10%+ Owner

Duolingo, Inc.

Security class: Class A Common Stock
Shares / value: 72
Estimated value: $7,097
Report date: 27 May 2026
Price: $98.57
Ownership: Direct

Form 4 holding Chief Tech Officer, Co-Founder, Director, 10%+ Owner

Duolingo, Inc.

Security class: Stock Option (Right to Buy)
Shares / value: 0
Estimated value
Report date: 03 Dec 2025
Price
Ownership: Direct
Underlying class: Class B Common Stock
Underlying amount

Insider Reports Filed by Severin Hacker

4 DUOL

Duolingo, Inc.

Report period: 27 May 2026
Transactions: 3
Transaction value: $0
Accepted by SEC: 29 May 2026, 16:08
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 17 Feb 2026
Transactions: 3
Transaction value: -$3,443,967
Accepted by SEC: 20 Feb 2026, 06:01
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 08 Dec 2025
Transactions: 3
Transaction value: $0
Accepted by SEC: 09 Dec 2025, 18:41
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Dec 2025
Transactions: 5
Transaction value: -$5,691,750
Accepted by SEC: 03 Dec 2025, 19:34
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Nov 2025
Transactions: 12
Transaction value: -$1,346,641
Accepted by SEC: 20 Nov 2025, 17:38
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 04 Nov 2025
Transactions: 14
Transaction value: -$2,250,499
Accepted by SEC: 06 Nov 2025, 16:19
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 20 Oct 2025
Transactions: 22
Transaction value: -$12,701,830
Accepted by SEC: 22 Oct 2025, 20:16
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 06 Oct 2025
Transactions: 15
Transaction value: -$2,835,503
Accepted by SEC: 07 Oct 2025, 16:13
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Sep 2025
Transactions: 9
Transaction value: -$2,508,573
Accepted by SEC: 22 Sep 2025, 16:17
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 Sep 2025
Transactions: 12
Transaction value: -$2,304,662
Accepted by SEC: 09 Sep 2025, 08:09
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 20 Aug 2025
Transactions: 3
Transaction value: $0
Accepted by SEC: 22 Aug 2025, 17:09
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Aug 2025
Transactions: 21
Transaction value: -$3,064,787
Accepted by SEC: 21 Aug 2025, 20:43
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 Aug 2025
Transactions: 16
Transaction value: -$3,063,276
Accepted by SEC: 07 Aug 2025, 21:10
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 21 Jul 2025
Transactions: 17
Transaction value: -$3,222,536
Accepted by SEC: 22 Jul 2025, 20:46
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 07 Jul 2025
Transactions: 13
Transaction value: -$3,548,085
Accepted by SEC: 09 Jul 2025, 17:11
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 20 Jun 2025
Transactions: 16
Transaction value: -$4,331,193
Accepted by SEC: 23 Jun 2025, 20:29
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 06 Jun 2025
Transactions: 3
Transaction value: $0
Accepted by SEC: 10 Jun 2025, 17:37
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 Jun 2025
Transactions: 16
Transaction value: -$4,870,239
Accepted by SEC: 09 Jun 2025, 17:17
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 May 2025
Transactions: 15
Transaction value: -$4,866,239
Accepted by SEC: 20 May 2025, 16:11
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 May 2025
Transactions: 17
Transaction value: -$4,578,727
Accepted by SEC: 07 May 2025, 16:06
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 21 Apr 2025
Transactions: 17
Transaction value: -$2,762,801
Accepted by SEC: 23 Apr 2025, 16:12
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 07 Apr 2025
Transactions: 25
Transaction value: -$2,543,502
Accepted by SEC: 09 Apr 2025, 16:07
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Mar 2025
Transactions: 22
Transaction value: -$2,607,677
Accepted by SEC: 21 Mar 2025, 18:59
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 Mar 2025
Transactions: 13
Transaction value: -$2,761,157
Accepted by SEC: 06 Mar 2025, 20:54
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Feb 2025
Transactions: 13
Transaction value: -$4,195,154
Accepted by SEC: 21 Feb 2025, 16:32
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 05 Feb 2025
Transactions: 15
Transaction value: -$3,914,552
Accepted by SEC: 06 Feb 2025, 19:27
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 21 Jan 2025
Transactions: 18
Transaction value: -$3,195,335
Accepted by SEC: 23 Jan 2025, 16:40
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 06 Jan 2025
Transactions: 16
Transaction value: -$3,362,318
Accepted by SEC: 07 Jan 2025, 16:06
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 26 Dec 2024
Transactions: 3
Transaction value: -$10,861,528
Accepted by SEC: 03 Jan 2025, 17:40
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 19 Dec 2024
Transactions: 13
Transaction value: -$3,368,203
Accepted by SEC: 20 Dec 2024, 16:16
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 13 Dec 2024
Transactions: 14
Transaction value: -$14,845,949
Accepted by SEC: 16 Dec 2024, 16:20
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 12 Dec 2024
Transactions: 13
Transaction value: -$14,129,045
Accepted by SEC: 13 Dec 2024, 17:09
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 11 Dec 2024
Transactions: 32
Transaction value: -$64,139,078
Accepted by SEC: 13 Dec 2024, 16:04
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4/A DUOL

Duolingo, Inc.

Report period: 22 Nov 2024
Transactions: 1
Transaction value: -$5,591,043
Accepted by SEC: 27 Nov 2024, 21:57
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 12 Nov 2024
Transactions: 3
Transaction value: $0
Accepted by SEC: 02 Dec 2024, 20:31
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 22 Aug 2024
Transactions: 3
Transaction value: $0
Accepted by SEC: 26 Aug 2024, 16:25
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Aug 2024
Transactions: 11
Transaction value: -$1,664,920
Accepted by SEC: 02 Aug 2024, 16:34
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Jul 2024
Transactions: 11
Transaction value: -$1,986,075
Accepted by SEC: 02 Jul 2024, 16:58
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 03 Jun 2024
Transactions: 11
Transaction value: -$1,963,871
Accepted by SEC: 05 Jun 2024, 16:32
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 May 2024
Transactions: 14
Transaction value: -$2,234,653
Accepted by SEC: 03 May 2024, 19:39
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Apr 2024
Transactions: 7
Transaction value: -$2,184,156
Accepted by SEC: 02 Apr 2024, 16:30
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 13 Mar 2024
Transactions: 3
Transaction value: $0
Accepted by SEC: 15 Mar 2024, 19:46
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Mar 2024
Transactions: 8
Transaction value: -$2,351,325
Accepted by SEC: 04 Mar 2024, 16:40
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Feb 2024
Transactions: 9
Transaction value: -$1,786,247
Accepted by SEC: 05 Feb 2024, 16:17
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 02 Jan 2024
Transactions: 11
Transaction value: -$2,142,456
Accepted by SEC: 03 Jan 2024, 16:52
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Dec 2023
Transactions: 9
Transaction value: -$2,128,662
Accepted by SEC: 04 Dec 2023, 16:10
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Nov 2023
Transactions: 7
Transaction value: -$1,465,700
Accepted by SEC: 02 Nov 2023, 16:29
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 02 Oct 2023
Transactions: 7
Transaction value: -$1,652,569
Accepted by SEC: 05 Oct 2023, 16:14
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 30 Aug 2023
Transactions: 3
Transaction value: $0
Accepted by SEC: 19 Sep 2023, 16:18
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 14 Aug 2023
Transactions: 2
Transaction value: -$4,366,786
Accepted by SEC: 16 Aug 2023, 21:11
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 31 May 2023
Transactions: 10
Transaction value: -$1,487,982
Accepted by SEC: 06 Sep 2023, 20:43
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 May 2023
Transactions: 6
Transaction value: -$1,383,485
Accepted by SEC: 02 May 2023, 19:34
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 03 Apr 2023
Transactions: 6
Transaction value: -$1,422,555
Accepted by SEC: 04 Apr 2023, 16:20
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Mar 2023
Transactions: 10
Transaction value: -$1,082,165
Accepted by SEC: 02 Mar 2023, 20:50
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Feb 2023
Transactions: 7
Transaction value: -$955,859
Accepted by SEC: 02 Feb 2023, 19:06
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 09 Jan 2023
Transactions: 6
Transaction value: -$750,680
Accepted by SEC: 11 Jan 2023, 15:44
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 14 Dec 2022
Transactions: 3
Transaction value: -$755,032
Accepted by SEC: 15 Dec 2022, 15:44
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 12 Dec 2022
Transactions: 3
Transaction value: $0
Accepted by SEC: 27 Jan 2023, 15:28
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Nov 2022
Transactions: 5
Transaction value: -$818,110
Accepted by SEC: 02 Nov 2022, 16:52
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 03 Oct 2022
Transactions: 6
Transaction value: -$965,418
Accepted by SEC: 04 Oct 2022, 16:46
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Sep 2022
Transactions: 6
Transaction value: -$1,841,792
Accepted by SEC: 06 Sep 2022, 20:20
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Aug 2022
Transactions: 7
Transaction value: -$942,588
Accepted by SEC: 02 Aug 2022, 16:37
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Jul 2022
Transactions: 9
Transaction value: -$912,240
Accepted by SEC: 05 Jul 2022, 16:39
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 23 Jun 2022
Transactions: 8
Transaction value: -$1,967,803
Accepted by SEC: 27 Jun 2022, 19:13
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 16 Jun 2022
Transactions: 8
Transaction value: -$1,827,204
Accepted by SEC: 21 Jun 2022, 16:28
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 09 Jun 2022
Transactions: 8
Transaction value: -$1,959,027
Accepted by SEC: 13 Jun 2022, 17:08
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 01 Jun 2022
Transactions: 6
Transaction value: -$1,658,303
Accepted by SEC: 03 Jun 2022, 16:14
Role: Chief Tech Officer, Co-Founder, Director, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 14 Dec 2021
Transactions: 3
Transaction value: $0
Accepted by SEC: 10 Feb 2022, 16:39
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 08 Dec 2021
Transactions: 3
Transaction value: -$3,960
Accepted by SEC: 10 Dec 2021, 16:27
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 15 Nov 2021
Transactions: 15
Transaction value: -$4,332,421
Accepted by SEC: 17 Nov 2021, 15:51
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 15 Aug 2021
Transactions: 1
Transaction value: $0
Accepted by SEC: 22 Sep 2021, 17:17
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

4 DUOL

Duolingo, Inc.

Report period: 30 Jul 2021
Transactions: 3
Transaction value: -$5,100,000
Accepted by SEC: 02 Aug 2021, 21:48
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

3 DUOL

Duolingo, Inc.

Report period: 27 Jul 2021
Transactions: 0
Transaction value: $0
Accepted by SEC: 27 Jul 2021, 21:01
Role: Chief Technology Officer,, Director, Co-Founder, 10%+ Owner
Next action: Open filing details

Insider Reports History

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Reported holdings for Severin Hacker

Insider Reports Filed by Severin Hacker