X0306 4 2021-12-01 false 0001110611 ON24 INC. ONTF 0001841654 Sharan Sharat C/O ON24, INC. 50 BEALE STREET, 8TH FLOOR SAN FRANCISCO CA 94015 true true false false President and Chief Executive Common Stock 2021-12-01 4 M false 46875.00 0.00 A 2041622.00 D Common Stock 2021-12-01 4 F false 22848.00 15.84 D 2018774.00 D Common Stock 2021-12-02 4 M false 46875.00 0.00 A 2065649.00 D Common Stock 2021-12-02 4 F false 23241.00 15.20 D 2042408.00 D Common Stock 92500.00 I Held by daughter Restricted Stock Units 2021-12-01 4 M false 46875.00 0.00 D Common Stock 46875.00 46875.00 D Restricted Stock Units 2021-12-02 4 M false 46875.00 0.00 D Common Stock 46875.00 0.00 D This transaction is not a sale of shares by the Reporting Person. Instead, the shares were withheld by the Issuer, to satisfy withholding taxes in connection with the settlement on December 1, 2021 of restricted stock units held by the Reporting Person. The previous Form 4 dated November 3, 2021 reflected 23,634 shares disposed. That share withholding was inadvertently overreported by 393 shares. Therefore, 393 shares are being deducted from this withholding. Original withholding amount is 23,241 shares; adjusted withholding amount is 22,848 shares. This transaction is not a sale of shares by the Reporting Person. Instead, the shares were withheld by the Issuer, to satisfy withholding taxes in connection with the settlement on December 2, 2021 of restricted stock units held by the Reporting Person. Each restricted stock unit represents the contingent right to receive one share of the issuer's common stock. Each restricted stock unit vested upon satisfaction of a service condition and a liquidity condition and settles for one share of the issuer's common stock. /s/ Sharat Sharan, William Weesner, Attorney-in-Fact 2021-12-03