[144] ON24, Inc. SEC Filing

Rhea-AI Filing Summary

ON24, Inc. insider Steven Vattuone filed a Form 144 reporting a proposed sale of 29,475 common shares with an aggregate market value of $165,142.53. The shares are part of restricted stock acquired from the issuer on 09/02/2025, and the approximate sale date is listed as 09/02/2025. The filing shows the issuer has 42,306,290 shares outstanding and that the planned sale would occur on the NYSE.

The filing also discloses prior transactions by the same person during the past three months: cumulative sales of 44,715 shares generating gross proceeds of $245,793.82 across six trades dated from 06/03/2025 to 08/21/2025. The filer certifies no undisclosed material adverse information and notes Rule 10b5-1 trading plan language.

Insights

Securities Analyst

TL;DR: Routine insider sale that appears immaterial relative to total shares outstanding.

Steven Vattuone's proposed sale of 29,475 shares represents roughly 0.07% of the issuer's 42.3 million shares outstanding, which is unlikely to be material to ON24's market capitalization. The filing is complete in listing acquisition date, nature (restricted stock), and planned sale logistics (broker and exchange). Recent sales totaling 44,715 shares and $245,793.82 in proceeds suggest ongoing disposition but not a large-scale exit.

Corporate Governance Expert

TL;DR: Disclosure meets Rule 144 requirements; no red flags for disclosure completeness.

The Form 144 provides required details: acquisition source (issuer), acquisition and payment dates, broker information, and prior three-month sales. The signer affirms absence of undisclosed material adverse information and references Rule 10b5-1 where applicable. From a governance perspective, documentation appears procedurally sound; the amounts disclosed are small relative to outstanding shares, limiting governance or signaling concerns.

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	29475	165142.53	42306290	09/02/2025	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	09/02/2025	Resticted Stock	Issuer			29475	09/02/2025	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 50 Beale Street 8th Floor San Francisco CA 94105	Common	08/21/2025	5117	26852.99
STEVEN VATTUONE 50 Beale Street 8th Floor San Francisco CA 94105	Common	08/20/2025	3094	16131.50
STEVEN VATTUONE 50 Beale Street 8th Floor San Francisco CA 94105	Common	06/06/2025	22048	122395.06
STEVEN VATTUONE 50 Beale Street 8th Floor San Francisco CA 94105	Common	06/05/2025	2448	13433.89
STEVEN VATTUONE 50 Beale Street 8th Floor San Francisco CA 94105	Common	06/04/2025	4692	25986.64
STEVEN VATTUONE 50 Beale Street 8th Floor San Francisco CA 94105	Common	06/03/2025	7316	40993.74

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 ONTF Form 144 filed by Steven Vattuone report?

The Form 144 reports a proposed sale of 29,475 common shares with aggregate market value of $165,142.53, to be sold on 09/02/2025 on the NYSE.

How many ONTF shares has the filer sold in the past three months?

The filing lists six prior sales totaling 44,715 shares with gross proceeds of $245,793.82 between 06/03/2025 and 08/21/2025.

What type of shares are being sold under this Form 144 for ONTF?

The shares to be sold are reported as restricted stock acquired from the issuer on 09/02/2025.

Which broker and exchange are listed for the proposed ONTF sale?

Broker: Morgan Stanley Smith Barney LLC; Exchange: NYSE.

How significant is the proposed sale relative to ON24's outstanding shares?

The proposed 29,475 shares represent about 0.07% of the reported 42,306,290 shares outstanding, indicating the sale is not material in size.