ON HLDG AG

Ticker: ONON CUSIP: H5919C104 Class: Common Stock

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

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

Q4 2025

Shares 158,930 Value ($000) $7,387 Avg Close $43.09 Range $34.38 - $50.02

Q3 2025

Shares 73,744 Value ($000) $3,123 Avg Close $47.59 Range $41.97 - $55.95

Q2 2022

Shares 245,880 Value ($000) $4,350 Avg Close $21.64 Range $16.38 - $27.10

Q1 2022

Shares 50,751 Value ($000) $1,281 Avg Close $26.65 Range $19.75 - $40.22

Q3 2021

Shares 8,303 Value ($000) $250 Avg Close $35.13 Range $30.06 - $40.80

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	158,930	$7,387	$43.09	$34.38 - $50.02
Q3 2025	73,744	$3,123	$47.59	$41.97 - $55.95
Q2 2022	245,880	$4,350	$21.64	$16.38 - $27.10
Q1 2022	50,751	$1,281	$26.65	$19.75 - $40.22
Q3 2021	8,303	$250	$35.13	$30.06 - $40.80