[Form 4] ON24, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Trempont Dominique, a director of ON24, Inc. (ONTF), reported a sale of common stock on 08/11/2025 executed pursuant to a Rule 10b5-1 trading plan adopted on 09/12/2024. The filing discloses a disposition of 10,066 shares at a weighted average price of $4.8745, with individual sale prices ranging from $4.785 to $4.94. After the reported transactions the reporting person beneficially owns 276,389 shares directly.

The sale was effected under a pre-established plan, and the filer offers to provide detailed breakdowns of the multiple transactions and prices upon request. The Form 4 was signed by an attorney-in-fact for the reporting person.

Positive

• Transaction executed under a Rule 10b5-1 trading plan, adopted on 09/12/2024, which provides a pre-established framework for the sale.
• Reporting person retains direct ownership of 276,389 shares following the reported transactions.

Negative

• Disposition of 10,066 shares on 08/11/2025, which reduces the reporting person’s holdings.
• Shares sold at prices as low as $4.785 during the reported transactions (range $4.785 to $4.94).

Insights

Financial Analyst

TL;DR: Director sold 10,066 ONTF shares under a 10b5-1 plan; remaining direct holdings equal 276,389 shares.

The transaction is a routine insider disposition executed under a pre-established Rule 10b5-1 plan adopted in September 2024, which reduces concerns about opportunistic timing. The sale quantity (10,066 shares) and the post-transaction direct ownership (276,389 shares) are disclosed plainly; the weighted average sale price is $4.8745 with a price range of $4.785–$4.94. Absent additional context on total outstanding shares or company market capitalization in this filing, the investor impact appears limited based on the information provided.

Corporate Governance Expert

TL;DR: Use of a 10b5-1 plan signals pre-planned sales and governance transparency; sale details are fully disclosed.

The filing documents that the dispositions were made pursuant to a Rule 10b5-1 trading plan, which is a governance mechanism that helps insulate directors from allegations of trading on non-public information. The reporting person also affirms willingness to provide granular trade-by-trade pricing on request, which supports transparency. From a governance standpoint, the Form 4 contains the key disclosures investors typically expect for an insider sale.

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^*

Trempont Dominique

(Last) (First) (Middle)

C/O ON24, INC.

50 BEALE STREET, 8TH FLOOR

(Street)

SAN FRANCISCO CA 94015

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

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	08/11/2025		S(1)		10,066	D	$4.8745(2)	276,389	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 transactions reported in this Form 4 were 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 $4.785 to $4.94, 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/ Trempont Dominique by Charles Rogerson, as Attorney-in-Fact	08/12/2025
	** 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 did Trempont Dominique sell in the Form 4 for ONTF?

The reporting person sold 10,066 shares of ON24 common stock on 08/11/2025.

At what price were the ONTF shares sold?

The weighted average sale price reported was $4.8745, with individual transactions ranging from $4.785 to $4.94.

Was the ONTF sale part of an insider trading plan?

Yes. The transactions were effected pursuant to a Rule 10b5-1 trading plan adopted on 09/12/2024.

How many ONTF shares does Trempont own after the sale?

Following the reported transactions, the reporting person beneficially owns 276,389 shares directly.

Who signed the Form 4 for Trempont Dominique?

The Form 4 was signed on behalf of the reporting person by an attorney-in-fact (Charles Rogerson).