Form 4 for ONON On Holding AG

Accepted 2026-03-31 00:00:00 ET · period of report 2026-03-20 · accession 0001860218-26-000008 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-03-31	2026-03-20	ONON	Hoffmann Martin	CEO	M - OptEx	$37.44	+25.0K	1.38M	+2%	+$936.0K
D	2026-03-31	2026-03-20	ONON	Hoffmann Martin	CEO	M - OptEx	$0.00	-25.0K	11.3K	-69%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Class A Shares	2026-03-20	M	A	25,000	$37.44	1,382,020	D	—	—	(F1) Options exercised on March 20, 2026. Shares settled on March 23, 2026. Exercise price paid in cash. (F2) The late filing resulted from an administrative error during the initial implementation of Section 16(a) reporting obligations for foreign private issuers.
2	Derivative	Stock Option (Right to Buy)	2026-03-20	M	D	25,000	$0.00	11,329	D	$7.73 · 2021-11-29 to 2028-11-29	25,000 Class A Shares	(F1) Options exercised on March 20, 2026. Shares settled on March 23, 2026. Exercise price paid in cash. (F2) The late filing resulted from an administrative error during the initial implementation of Section 16(a) reporting obligations for foreign private issuers. (F4) Stock Option granted under the Issuer's Long Term Incentive Plan 2020 (the "LTIP 2020"). All options granted under the LTIP 2020 met their full vesting requirements in connection with the Issuer's initial public offering in September 2021, which constituted an exit event. Outstanding awards under the LTIP 2020 are fully vested and exercisable. Vested options may be exercised until the seventh anniversary of the contractual granting date.