ON24 (ONTF) CFO reports 80,000-share sale under Rule 10b5-1 plan

Rhea-AI Filing Summary

ON24, Inc.’s Chief Financial Officer sells shares under a trading plan. The reporting person, ON24’s Chief Financial Officer, reported selling 80,000 shares of common stock on 12/30/2025 at a weighted average price of $7.9843 per share, with individual sale prices ranging from $7.96 to $7.9878. After this transaction, the officer beneficially owns 452,654 shares of ON24 common stock in direct ownership.

The sale was executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on September 12, 2024, which is designed to allow insiders to sell shares according to preset instructions.

Insider Trade Summary

Net Seller: 80,000 shares ($638,744)

Net Sell 1 txn

Insider Vattuone Steven

Role Chief Financial Officer

Sold 80,000 shs ($639K)

Type	Security	Shares	Price	Value
Sale	Common Stock	80,000	$7.9843	$639K

Holdings After Transaction: Common Stock — 452,654 shares (Direct)

Footnotes (1)

1. The transaction reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on September 12, 2024. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $7.96 to $7.9878 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 (2) to this Form 4.

Form 4 Insider Transactions: What Each Field Means →

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).

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 CA 94105

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/30/2025

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

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

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

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	12/30/2025		S(1)		80,000	D	$7.9843(2)	452,654	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 September 12, 2024.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $7.96 to $7.9878 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 (2) to this Form 4.

Remarks:

	/s/ Vattuone Steven by Charles Rogerson, as Attorney-in-Fact	01/02/2026
	** 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.

FAQ

What insider transaction did ON24 (ONTF) report in this Form 4?

The filing reports that ON24’s Chief Financial Officer sold 80,000 shares of ON24 common stock on 12/30/2025.

At what price did the ON24 (ONTF) CFO sell shares?

The shares were sold at a weighted average price of $7.9843 per share, with individual trades executed between $7.96 and $7.9878.

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

Following the reported sale, the Chief Financial Officer beneficially owns 452,654 shares of ON24 common stock in direct ownership.

Was the ON24 (ONTF) CFO share sale under a Rule 10b5-1 trading plan?

Yes. The transaction was effected under a Rule 10b5-1 trading plan that the reporting person adopted on September 12, 2024.

What role does the reporting person hold at ON24 (ONTF)?

The reporting person is an officer of ON24, serving as the company’s Chief Financial Officer.

Is this ON24 (ONTF) Form 4 filed for one insider or multiple insiders?

The document states that the Form is filed by one reporting person, covering this individual officer’s transactions.