X0407 4 2023-06-09 false 0001110611 ON24 INC. ONTF 0001337841 Trempont Dominique C/O ON24, INC. 50 BEALE STREET, 8TH FLOOR SAN FRANCISCO CA 94015 true false false false false Common Stock 16900.00 D Common Stock 11586.00 D Stock Options (Right to buy) 13.33 2030-12-11 Common Stock 20000.00 20000.00 D Stock Options (Right to buy) 1.35 2028-12-21 Common Stock 12131.00 12131.00 D Stock Options (Right to buy) 1.23 2030-01-16 Common Stock 21000.00 21000.00 D The Reporting Person is voluntarily restating his holdings in light of the $1.09 special dividend declared on May 8, 2023, payable on or about June 15,2023, to stockholders of record as of the close of business on May 22, 2023. Pursuant to antidilution provisions, the previously awarded restricted stock units ("RSUs") with 14,586 shares outstanding were automatically adjusted to represent RSUs to acquire 16,900 shares, as reflected herein. There were no other changes to the RSUs. 100% of the RSUs will vest on June 10, 2023. Pursuant to antidilution provisions, the previously awarded RSUs with 10,000 shares outstanding were automatically adjusted to represent RSUs to acquire 11,586 shares, as reflected herein. There were no other changes to the RSUs. Pursuant to antidilution provisions, the exercise price of $14.42 per share of the previously awarded options were automatically adjusted to $13.33 per share, as reflected herein. There were no other changes to the options. The options are fully vested and exercisable. Pursuant to antidilution provisions, the exercise price of $2.44 per share of the previously awarded options were automatically adjusted to $1.35 per share, as reflected herein. There were no other changes to the options. Pursuant to antidilution provisions, the exercise price of $2.32 per share of the previously awarded options were automatically adjusted to $1.23 per share, as reflected herein. There were no other changes to the options. /s/ Trempont Dominique by Charles Rogerson, as Attorney-in-Fact 2023-06-09