On Holding director granted 2,433 RSUs

The restricted stock units vested immediately, leaving Helena Helmersson with reported direct holdings of 6,822 Class A shares.

Rhea-AI Filing Summary

On Holding AG (symbol: ONON) is the issuer of record for a Form 4 filing submitted to the SEC. On Holding AG director Helena Helmersson acquired 2,433 Class A shares through a grant of restricted stock units on September 21, 2026. The 2,433 units vested into Class A shares immediately after the grant. Her reported direct holdings following the transaction were 6,822 Class A shares. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Grant/Award: 2,433 shares

Grant/Award 1 txn

Insider Helmersson Helena

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A Shares F1	2,433	--	--

Holdings After Transaction: Class A Shares — 6,822 shares (Direct)

Footnotes (1)

1. F1. On September 21, 2026, the Reporting Person was granted 2,433 restricted stock units, which vested into Class A Shares immediately after the grant.

Key Figures

Restricted stock units granted: 2,433 restricted stock units Class A shares from vesting: 2,433 shares Direct Class A shares following transaction: 6,822 shares

3 metrics

Restricted stock units granted 2,433 restricted stock units Granted September 21, 2026; vested immediately after the grant.

Class A shares from vesting 2,433 shares Vested immediately after the restricted stock unit grant on September 21, 2026.

Direct Class A shares following transaction 6,822 shares Helena Helmersson's reported holdings following the transaction.

Key Terms

restricted stock units, vested, Class A Shares

3 terms

restricted stock units financial

"granted 2,433 restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vested financial

"which vested into Class A Shares immediately after the grant"

Class A Shares financial

"vested into Class A Shares immediately after the grant"

Class A shares are one of a company’s distinct types of stock that come with a specific set of rights—commonly different voting power, dividend treatment, or transfer rules—defined in the company’s charter. Investors care because those rights affect control, income and resale value; like holding a seat at a table that has different rules or stronger chips than other seats, owning Class A changes how much influence and return you can expect.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did ONON director Helena Helmersson receive?

She received a grant of 2,433 restricted stock units on September 21, 2026. The units vested into Class A shares immediately after the grant.

How many ONON shares vested from the award?

The 2,433 restricted stock units vested into 2,433 Class A shares immediately after the grant on September 21, 2026.

How many ONON shares did Helena Helmersson hold afterward?

Her reported direct holdings following the transaction were 6,822 Class A shares.

Was Helena Helmersson’s ONON transaction a market purchase or a planned trade?

It was a restricted stock unit grant that vested into Class A shares, rather than a reported market purchase. No Rule 10b5-1 plan is reported.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/23/2026 - 08:26 AM Accepted by SEC EDGAR 09/23/2026 - 08:25 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Helmersson Helena

(Last) (First) (Middle)

C/O ON HOLDING AG

FORRLIBUCKSTRASSE 190

(Street)

ZURICH 8005

(City) (State) (Zip)

SWITZERLAND

(Country)

2. Issuer Name and Ticker or Trading Symbol
On Holding AG [ ONON ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Shares	09/21/2026		A		2,433	A	(1)	6,822	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On September 21, 2026, the Reporting Person was granted 2,433 restricted stock units, which vested into Class A Shares immediately after the grant.

	/s/ Zlatina Iliev, Attorney-in-Fact	09/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)