X0306 4 2022-01-02 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 2022-01-02 4 M false 248718.00 1.95 A 2291126.00 D Common Stock 2022-01-02 4 M false 1282.00 1.95 A 2292408.00 D Common Stock 2022-01-02 4 F false 145.00 17.35 D 2292263.00 D Common Stock 2022-01-02 4 F false 129185.00 17.35 D 2163078.00 D Common Stock 92500.00 I Held by daughter Stock Option (Right to Buy) 1.95 2022-01-02 4 M false 1282.00 0.00 D 2022-01-04 Common Stock 1282.00 0.00 D Stock Option (Right to Buy) 1.95 2022-01-02 4 M false 248718.00 0.00 D 2022-01-04 Common Stock 248718.00 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 the cost of the exercise in connection with the exercise on January 2, 2022 of ISO stock option held by the Reporting Person. This transaction is not a sale of shares by the Reporting Person. Instead, the shares were withheld by the Issuer, to satisfy the cost of the exercise and withholding taxes in connection with the exercise on January 2, 2022 of NSO stock option held by the Reporting Person. The option is fully vested and exercisable /s/ Sharat Sharan, William Weesner, Attorney-in-Fact 2021-01-04