James Blackie - 30 Dec 2025 Form 4 Insider Report for ON24 INC. (ONTF)

Signature
/s/ Blackie James by Charles Rogerson, as Attorney-in-Fact
Issuer symbol
ONTF
Transactions as of
30 Dec 2025
Net transactions value
-$111,520
Form type
4
Filing time
02 Jan 2026, 16:26:34 UTC
Previous filing
03 Dec 2025
Next filing
10 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Blackie James Chief Revenue Officer C/O ON24, INC., 301 HOWARD STREET, SUITE 1100, SAN FRANCISCO /s/ Blackie James by Charles Rogerson, as Attorney-in-Fact 02 Jan 2026 0001841671

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ONTF Common Stock Options Exercise $15,840 +16,000 +3.3% $0.9900 494,861 30 Dec 2025 Direct
transaction ONTF Common Stock Sale $127,360 -16,000 -3.2% $7.96 478,861 30 Dec 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ONTF Stock Option (Right to Buy) Options Exercise $0 -16,000 -31% $0.000000 35,696 30 Dec 2025 Common Stock 16,000 $0.9900 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 The transaction reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on March 14, 2025.
F2 The options are fully vested and exercisable.