ONTF insider files Form 144 to sell 3,821 common shares

A holder of ONTF common stock has filed a Form 144 notice to sell 3,821 shares through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 20,786.24.

Rhea-AI Filing Summary

A holder of ONTF common stock has filed a Form 144 notice to sell 3,821 shares through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 20,786.24. The filing states that 42,282,395 common shares were outstanding at the time of the notice.

The shares to be sold were acquired as restricted stock units from the issuer on 11/20/2025, with the same date listed for payment and the nature of payment noted as "N/A." The notice also lists other common stock sales for the account of Steven Vattuone during the prior three months, including 4,392 shares on 11/20/2025 for gross proceeds of 23,267.94 and several earlier sales in 09/2025.

By signing the notice, the seller represents that they are not aware of any undisclosed material adverse information about the issuer and acknowledges the requirements related to Rule 10b5-1 plans and the consequences of intentional misstatements.

FAQ

What does the ONTF Form 144 filing report?

The filing reports a proposed sale of 3,821 shares of ONTF common stock, to be executed through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 20,786.24.

How many ONTF shares are outstanding according to the Form 144?

The Form 144 states that there were 42,282,395 ONTF common shares outstanding at the time of the notice.

How were the ONTF shares in this Form 144 acquired?

The 3,821 ONTF common shares were acquired on 11/20/2025 as restricted stock units from the issuer, with the nature of payment listed as "N/A."

Who is selling ONTF shares under this Form 144 and what prior sales are disclosed?

The sales are for the account of Steven Vattuone. Prior three-month sales disclosed include 4,392 shares of common stock on 11/20/2025 for gross proceeds of 23,267.94, plus several transactions in 09/2025.

Which broker is handling the ONTF Form 144 sale?

The Form 144 lists Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, as the broker for the sale on the NYSE.

What representations does the seller make in the ONTF Form 144?

The seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed and acknowledges that intentional misstatements or omissions can be federal criminal violations.

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Accepted by SEC EDGAR 11/24/2025 - 04:26 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001335061
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ON24 INC
SEC File Number	001-39965
Address of Issuer	301 Howard Street, Suite 1100 San Francisco CALIFORNIA 94105
Phone	415-369-8000
Name of Person for Whose Account the Securities are To Be Sold	STEVEN VATTUONE
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	3821	20786.24	42282395	11/24/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	11/20/2025	Restricted Stock Units	Issuer			3821	11/20/2025	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	11/20/2025	4392	23267.94
10b5-1 Sales for STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/09/2025	20116	111494.94
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/04/2025	6394	35274.42
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/03/2025	3549	19261.84
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/02/2025	3222	18052.22

144: Remarks and Signature

Remarks
Date of Notice	11/24/2025
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/12/2024
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Steven Vattuone
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)