Anthony Zingale - 01 Apr 2026 Form 4 Insider Report for ON24 INC. (ONTF)

Reporting relationship: Director
Issuer ticker: ONTF
Reported as of: 01 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Apr 2026, 13:23:14 UTC
Prior SEC filing: 27 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Zingale Anthony by Charles Rogerson, as Attorney-in-Fact

Key filing fact

Anthony Zingale filed Form 4 for ON24 INC. (ONTF) on 02 Apr 2026.

Key facts

This page summarizes Anthony Zingale's Form 4 filing for ON24 INC. (ONTF).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Apr 2026, 13:23.

Change

Previous filing in this sequence was filed on 27 Aug 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001180246 Primary reporting owner

ZINGALE ANTHONY

Relationship: Director
Address: C/O ON24, INC., 301 HOWARD STREET, SUITE 1100, SAN FRANCISCO
Signature: /s/ Zingale Anthony by Charles Rogerson, as Attorney-in-Fact
Signature date: 02 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ONTF transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -137,265
Change %: -100%
Price
Shares after: 0
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Anthony Zingale is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 1 footnote

Footnote F1

Pursuant to the Agreement and Plan of Merger, dated as of December 29, 2025 (the "Merger Agreement") among the Issuer, Cvent Atlanta, LLC ("Parent"), and Summit Sub Corp. ("Merger Sub"), on April 1, 2026, Merger Sub merged with and into the Issuer, with the Issuer continuing as the surviving company and a wholly-owned subsidiary of Parent (the "Merger"). At the effective time of the Merger, each outstanding share of Issuer common stock was automatically canceled and converted into the right to receive cash in an amount equal to $8.10 per share, without interest, with similar treatment for outstanding RSUs.