X0306 4 2021-08-24 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 2021-08-24 2021-08-24 4 P false 23500.00 22.1204 A 1933172.00 D Common Stock 92500.00 I Held by daughter Shares acquired on the open market. The price reported in Column 4 is a weighted average price. These shares were acquired in multiple transactions ranging from $21.89 to $22.25, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares acquired at each separate price within the ranges set forth in footnote (2) to this Form 4. /s/ Sharat Sharan, William Weesner, Attorney-in-Fact 2021-08-24