[144] ON24 INC. SEC Filing

Rhea-AI Filing Summary

ON24, Inc. insider plans additional stock sale under Rule 144. A holder has filed to sell 4,392 shares of ON24 common stock through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of $23,267.94. These shares were acquired as restricted stock from the issuer on 11/20/2025 and are part of the company’s 42,282,395 common shares outstanding. Over the prior three months, the same seller completed several open-market sales of ON24 common stock on various dates in August and September 2025, each with disclosed share amounts and gross proceeds.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	4392	23267.94	42282395	11/20/2025	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	Issuer			4392	11/20/2025	Not Applicable

* 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	09/09/2025	20116	111494.94
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/08/2025	4195	23412.71
STEVEN VATTUONE 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	09/05/2025	5251	28961.89
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
Steven Vattuone 301 Howard Street, Suite 1100 San Francisco CA 94105	Common	08/21/2025	5117	26852.99

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the ON24 (ONTF) Form 144 filing disclose?

The Form 144 discloses that a holder intends to sell 4,392 shares of ON24, Inc. common stock under Rule 144, with an aggregate market value of $23,267.94, through Morgan Stanley Smith Barney LLC on the NYSE.

Who is selling ON24 (ONTF) shares and how many have been sold recently?

The seller is Steven Vattuone, listed at a San Francisco address. Over the past three months, he has sold multiple blocks of ON24 common stock on dates in August and September 2025, with each transaction showing specific share amounts and gross proceeds.

What class of ON24 (ONTF) securities is covered by this Form 144?

The filing covers common stock of ON24, Inc. The planned sale involves 4,392 common shares, to be executed on the NYSE through Morgan Stanley Smith Barney LLC.

When were the ON24 (ONTF) shares to be sold under Form 144 acquired?

The 4,392 ON24 common shares covered by this notice were acquired on 11/20/2025 as restricted stock from the issuer, with the date of payment also listed as 11/20/2025.

How many ON24 (ONTF) shares are outstanding according to the Form 144?

The Form 144 states that ON24, Inc. has 42,282,395 common shares outstanding, providing context for the size of the planned 4,392-share sale.

Which broker is handling the ON24 (ONTF) Form 144 sale and on what exchange?

The broker named is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, NY 10004, and the shares are expected to be sold on the NYSE.

What representation does the seller make in the ON24 (ONTF) Form 144?

By signing the notice, the seller represents that they do not know any material adverse information about ON24’s current or prospective operations that has not been publicly disclosed, as required by the form’s certification language.