DUOLINGO INC

Ticker: DUOL CUSIP: 26603R106 Class: EQTY

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 8,455 Value ($000) $1,484 Avg Close $235.64 Range $166.27 - $353.00

Q3 2025

Shares 10,699 Value ($000) $3,443 Avg Close $334.45 Range $256.63 - $468.00

Q2 2025

Shares 3,778 Value ($000) $1,549 Avg Close $438.78 Range $274.97 - $544.93

Q1 2024

Shares 2,641 Value ($000) $583 Avg Close $203.74 Range $171.64 - $245.59

Q4 2023

Shares 4,466 Value ($000) $1,013 Avg Close $194.44 Range $140.16 - $245.87

Q3 2023

Shares 387 Value ($000) $64 Avg Close $147.08 Range $121.89 - $174.70

Q2 2023

Shares 6,663 Value ($000) $952 Avg Close $143.30 Range $116.82 - $168.40

Q1 2023

Shares 11,417 Value ($000) $1,628 Avg Close $102.70 Range $68.93 - $146.40

Q3 2022

Shares 19,272 Value ($000) $1,835 Avg Close $97.34 Range $87.14 - $113.36

Q4 2021

Shares 813 Value ($000) $86 Avg Close $137.73 Range $94.50 - $191.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	8,455	$1,484	$235.64	$166.27 - $353.00
Q3 2025	10,699	$3,443	$334.45	$256.63 - $468.00
Q2 2025	3,778	$1,549	$438.78	$274.97 - $544.93
Q1 2024	2,641	$583	$203.74	$171.64 - $245.59
Q4 2023	4,466	$1,013	$194.44	$140.16 - $245.87
Q3 2023	387	$64	$147.08	$121.89 - $174.70
Q2 2023	6,663	$952	$143.30	$116.82 - $168.40
Q1 2023	11,417	$1,628	$102.70	$68.93 - $146.40
Q3 2022	19,272	$1,835	$97.34	$87.14 - $113.36
Q4 2021	813	$86	$137.73	$94.50 - $191.82