Hacker Severin

Insider

Chief Tech Officer, Co-Founder

Trades at: DUOL

30D 90D 1Y

Net shares · 365d

-100.0K

0 buy · 100.0K sell

Net value · 365d

-$30.7M

$0 in · $30.7M out

Sentiment · 365d

Net selling

0% buying · 100% selling

Open-market trades · 365d

108

0 buy · 100.0K sell

Net buy / sell volume (all companies)

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions · open-market

Include grants & non-market

DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$49.5K

280 sh · $176.68

Own -80%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$76.3K

435 sh · $175.46

Own -55%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$539.4K

3.1K sh · $174.61

Own -80%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$132.0K

760 sh · $173.74

Own -16%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$220.8K

1.3K sh · $172.39

Own -22%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$344.5K

2.0K sh · $171.50

Own -25%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$170.6K

1.0K sh · $170.55

Own -11%
DUOL Sell·S
Nov 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$194.3K

1.1K sh · $169.57

Own -11%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$465.7K

1.8K sh · $261.94

Own -23%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$459.6K

1.7K sh · $266.12

Own -59%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$201.4K

760 sh · $265.02

Own -21%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$429.1K

1.6K sh · $264.06

Own -30%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$147.3K

560 sh · $262.97

Own -10%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$305.6K

1.1K sh · $266.87

Own -94%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$43.1K

165 sh · $261.14

Own -2%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$145.4K

560 sh · $259.71

Own -7%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$242.2K

936 sh · $258.77

Own -10%
DUOL Sell·S
Nov 4, 25

Chief Tech Officer, Co-Founder · 10b5-1

$191.9K

744 sh · $257.92

Own -7%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$216.0K

680 sh · $317.68

Own -25%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$157.0K

500 sh · $313.93

Own -8%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$347.4K

1.1K sh · $315.79

Own -20%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$506.6K

1.6K sh · $316.64

Own -37%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$289.1K

907 sh · $318.73

Own -44%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$96.0K

300 sh · $319.97

Own -26%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$128.7K

400 sh · $321.75

Own -46%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$96.9K

300 sh · $323.09

Own -64%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$32.4K

100 sh · $324.10

Own -58%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$30.6K

100 sh · $305.86

Own -1%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$184.5K

600 sh · $307.55

Own -6%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$154.5K

500 sh · $309.06

Own -5%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$195.9K

632 sh · $309.94

Own -7%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$311.4K

1.0K sh · $311.43

Own -12%
DUOL Sell·S
Oct 20, 25

Chief Tech Officer, Co-Founder · 10b5-1

$400.1K

1.3K sh · $312.37

Own -18%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$158.7K

500 sh · $317.31

Own -5%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$65.8K

200 sh · $328.76

Own -74%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$425.7K

1.3K sh · $327.44

Own -83%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$195.9K

600 sh · $326.50

Own -28%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$162.6K

500 sh · $325.22

Own -19%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$97.2K

300 sh · $324.10

Own -10%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$35.2K

109 sh · $322.62

Own -4%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$377.0K

1.2K sh · $321.39

Own -28%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$577.6K

1.8K sh · $320.33

Own -30%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$511.0K

1.6K sh · $319.56

Own -21%
DUOL Sell·S
Oct 6, 25

Chief Tech Officer, Co-Founder · 10b5-1

$609.8K

1.9K sh · $318.26

Own -20%
DUOL Sell·S
Sep 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$662.0K

2.3K sh · $287.81

Own -26%
DUOL Sell·S
Sep 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$550.6K

1.9K sh · $289.79

Own -46%
DUOL Sell·S
Sep 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$664.3K

2.3K sh · $288.81

Own -36%
DUOL Sell·S
Sep 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$639.7K

2.2K sh · $290.78

Own -97%
DUOL Sell·S
Sep 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$372.8K

1.3K sh · $286.77

Own -13%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$562.7K

2.1K sh · $267.93

Own -28%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$54.3K

200 sh · $271.57

Own -74%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$446.4K

1.6K sh · $271.05

Own -86%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$431.8K

1.6K sh · $269.87

Own -45%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$526.0K

2.0K sh · $268.92

Own -36%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$226.6K

849 sh · $266.90

Own -10%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$305.3K

1.1K sh · $265.95

Own -12%
DUOL Sell·S
Sep 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$132.4K

500 sh · $264.75

Own -5%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$340.2K

1.0K sh · $339.15

Own -10%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$578.1K

1.7K sh · $340.03

Own -19%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$72.6K

200 sh · $363.05

Own -74%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$71.9K

200 sh · $359.30

Own -42%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$35.8K

100 sh · $357.67

Own -17%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$142.0K

400 sh · $354.89

Own -41%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$106.2K

300 sh · $354.08

Own -24%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$70.5K

200 sh · $352.40

Own -14%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$140.5K

400 sh · $351.29

Own -21%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$34.9K

100 sh · $349.28

Own -5%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$139.5K

400 sh · $348.83

Own -17%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$173.7K

500 sh · $347.48

Own -17%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$207.7K

600 sh · $346.15

Own -17%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$103.5K

300 sh · $345.02

Own -8%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$103.1K

300 sh · $343.82

Own -7%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$450.8K

1.3K sh · $342.00

Own -24%
DUOL Sell·S
Aug 19, 25

Chief Tech Officer, Co-Founder · 10b5-1

$674.7K

2.0K sh · $340.92

Own -27%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$390.9K

1.1K sh · $344.99

Own -33%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$206.1K

600 sh · $343.43

Own -15%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$755.3K

2.2K sh · $342.56

Own -35%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$454.3K

1.3K sh · $341.55

Own -18%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$142.0K

400 sh · $355.06

Own -85%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$136.7K

403 sh · $339.32

Own -4%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$69.3K

200 sh · $346.73

Own -9%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$104.8K

300 sh · $349.25

Own -14%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$70.2K

200 sh · $351.08

Own -11%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$70.5K

200 sh · $352.75

Own -12%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$330.0K

931 sh · $354.45

Own -66%
DUOL Sell·S
Aug 5, 25

Chief Tech Officer, Co-Founder · 10b5-1

$713.9K

2.1K sh · $340.28

Own -22%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$438.6K

1.2K sh · $365.49

Own -64%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$74.0K

200 sh · $370.05

Own -74%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$36.8K

100 sh · $367.61

Own -27%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$109.9K

300 sh · $366.32

Own -45%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$576.0K

1.6K sh · $364.55

Own -46%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$225.3K

620 sh · $363.40

Own -15%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$72.4K

200 sh · $361.87

Own -5%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$868.7K

2.4K sh · $355.31

Own -24%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$134.5K

373 sh · $360.54

Own -8%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$307.1K

854 sh · $359.65

Own -16%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$107.5K

300 sh · $358.39

Own -5%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$393.2K

1.1K sh · $357.47

Own -16%
DUOL Sell·S
Jul 21, 25

Chief Tech Officer, Co-Founder · 10b5-1

$259.3K

728 sh · $356.20

Own -10%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$77.4K

200 sh · $386.91

Own -2%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$194.3K

500 sh · $388.56

Own -5%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$680.4K

1.7K sh · $390.83

Own -19%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$609.9K

1.6K sh · $391.71

Own -20%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$785.5K

2.0K sh · $392.76

Own -33%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$551.3K

1.4K sh · $393.78

Own -34%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$476.1K

1.2K sh · $396.09

Own -64%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$315.9K

800 sh · $394.93

Own -30%
DUOL Sell·S
Jul 7, 25

Chief Tech Officer, Co-Founder · 10b5-1

$238.0K

600 sh · $396.73

Own -89%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	280	-80%	$176.68	$49.5K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	435	-55%	$175.46	$76.3K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	3.1K	-80%	$174.61	$539.4K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	760	-16%	$173.74	$132.0K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-22%	$172.39	$220.8K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.0K	-25%	$171.50	$344.5K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.0K	-11%	$170.55	$170.6K
Nov 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-11%	$169.57	$194.3K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.8K	-23%	$261.94	$465.7K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.7K	-59%	$266.12	$459.6K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	760	-21%	$265.02	$201.4K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-30%	$264.06	$429.1K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	560	-10%	$262.97	$147.3K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-94%	$266.87	$305.6K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	165	-2%	$261.14	$43.1K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	560	-7%	$259.71	$145.4K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	936	-10%	$258.77	$242.2K
Nov 4, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	744	-7%	$257.92	$191.9K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	680	-25%	$317.68	$216.0K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-8%	$313.93	$157.0K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-20%	$315.79	$347.4K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-37%	$316.64	$506.6K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	907	-44%	$318.73	$289.1K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-26%	$319.97	$96.0K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	400	-46%	$321.75	$128.7K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-64%	$323.09	$96.9K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	100	-58%	$324.10	$32.4K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	100	-1%	$305.86	$30.6K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	600	-6%	$307.55	$184.5K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-5%	$309.06	$154.5K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	632	-7%	$309.94	$195.9K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.0K	-12%	$311.43	$311.4K
Oct 20, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-18%	$312.37	$400.1K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-5%	$317.31	$158.7K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-74%	$328.76	$65.8K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-83%	$327.44	$425.7K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	600	-28%	$326.50	$195.9K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-19%	$325.22	$162.6K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-10%	$324.10	$97.2K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	109	-4%	$322.62	$35.2K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.2K	-28%	$321.39	$377.0K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.8K	-30%	$320.33	$577.6K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-21%	$319.56	$511.0K
Oct 6, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.9K	-20%	$318.26	$609.8K
Sep 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.3K	-26%	$287.81	$662.0K
Sep 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.9K	-46%	$289.79	$550.6K
Sep 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.3K	-36%	$288.81	$664.3K
Sep 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.2K	-97%	$290.78	$639.7K
Sep 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-13%	$286.77	$372.8K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.1K	-28%	$267.93	$562.7K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-74%	$271.57	$54.3K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-86%	$271.05	$446.4K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-45%	$269.87	$431.8K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.0K	-36%	$268.92	$526.0K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	849	-10%	$266.90	$226.6K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-12%	$265.95	$305.3K
Sep 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-5%	$264.75	$132.4K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.0K	-10%	$339.15	$340.2K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.7K	-19%	$340.03	$578.1K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-74%	$363.05	$72.6K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-42%	$359.30	$71.9K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	100	-17%	$357.67	$35.8K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	400	-41%	$354.89	$142.0K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-24%	$354.08	$106.2K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-14%	$352.40	$70.5K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	400	-21%	$351.29	$140.5K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	100	-5%	$349.28	$34.9K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	400	-17%	$348.83	$139.5K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-17%	$347.48	$173.7K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	600	-17%	$346.15	$207.7K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-8%	$345.02	$103.5K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-7%	$343.82	$103.1K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-24%	$342.00	$450.8K
Aug 19, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.0K	-27%	$340.92	$674.7K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-33%	$344.99	$390.9K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	600	-15%	$343.43	$206.1K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.2K	-35%	$342.56	$755.3K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.3K	-18%	$341.55	$454.3K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	400	-85%	$355.06	$142.0K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	403	-4%	$339.32	$136.7K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-9%	$346.73	$69.3K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-14%	$349.25	$104.8K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-11%	$351.08	$70.2K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-12%	$352.75	$70.5K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	931	-66%	$354.45	$330.0K
Aug 5, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.1K	-22%	$340.28	$713.9K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.2K	-64%	$365.49	$438.6K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-74%	$370.05	$74.0K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	100	-27%	$367.61	$36.8K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-45%	$366.32	$109.9K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-46%	$364.55	$576.0K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	620	-15%	$363.40	$225.3K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-5%	$361.87	$72.4K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.4K	-24%	$355.31	$868.7K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	373	-8%	$360.54	$134.5K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	854	-16%	$359.65	$307.1K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	300	-5%	$358.39	$107.5K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.1K	-16%	$357.47	$393.2K
Jul 21, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	728	-10%	$356.20	$259.3K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	200	-2%	$386.91	$77.4K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	500	-5%	$388.56	$194.3K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.7K	-19%	$390.83	$680.4K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.6K	-20%	$391.71	$609.9K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	2.0K	-33%	$392.76	$785.5K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.4K	-34%	$393.78	$551.3K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	1.2K	-64%	$396.09	$476.1K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	800	-30%	$394.93	$315.9K
Jul 7, 2025	DUOL	Chief Tech Officer, Co-Founder	Sell S	600	-89%	$396.73	$238.0K

About Hacker Severin

This profile aggregates every SEC Form 4 insider transaction reported by Hacker Severin across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.