ON24 (ONTF) CFO sells 3,429 shares to cover RSU tax obligations

Rhea-AI Filing Summary

ON24 Inc. Chief Financial Officer Steven Vattuone sold 3,429 shares of common stock at a weighted average price of $8.0656 per share. The shares were sold to cover tax withholding obligations tied to vesting restricted stock units and were executed under a pre-arranged Rule 10b5-1 trading plan. After this transaction, he directly holds 432,001 ON24 shares.

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

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

X

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^*

Vattuone Steven

(Last) (First) (Middle)

C/O ON24, INC.

301 HOWARD STREET, SUITE 1100

(Street)

SAN FRANCISCO CALIFORNIA 94105

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ON24 INC. [ ONTF ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/20/2026

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
Common Stock	03/20/2026		S(1)(2)		3,429	D	$8.0656(3)	432,001	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. The transaction reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on August 7, 2024.

2. Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $8.06 to $8.075, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Security and Exchange Commission, upon request, full information regarding the number of shares sold in each separate price within the ranges set forth in footnote (3) to this Form 4.

Remarks:

	/s/ Vattuone Steven by Charles Rogerson, as Attorney-in-Fact	03/24/2026
	** 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)

FAQ

What did ON24 (ONTF) CFO Steven Vattuone report in this Form 4?

Steven Vattuone reported selling 3,429 shares of ON24 common stock. The sale was made at a weighted average price of $8.0656 per share and was linked to covering tax obligations from restricted stock unit vesting.

Was the ON24 (ONTF) CFO sale part of a trading plan?

Yes. The sale was executed under a Rule 10b5-1 trading plan adopted by Steven Vattuone on August 7, 2024. Such plans pre-schedule trades, making the timing more routine and less indicative of short-term views on the stock.

Why did ON24 (ONTF) CFO sell 3,429 shares of stock?

The 3,429 shares were sold to cover tax withholding obligations from the vesting of restricted stock units. This type of transaction is compensation-related and typically reflects tax requirements rather than a discretionary portfolio change.

How many ON24 (ONTF) shares does the CFO hold after this transaction?

After the reported sale, Steven Vattuone directly holds 432,001 shares of ON24 common stock. This remaining position shows the transaction is small compared with his overall direct holdings reported in the filing.

At what prices were the ON24 (ONTF) CFO’s shares sold?

The filing reports a weighted average sale price of $8.0656 per share. Footnotes explain the shares were sold in multiple transactions with individual prices ranging between $8.06 and $8.075 per share, inclusive.

Does the ON24 (ONTF) Form 4 indicate any option exercises or derivatives?

No derivative transactions were reported in this Form 4. The filing shows only a non-derivative sale of common stock related to tax withholding, with no remaining derivative positions listed in the derivative summary section.