ON24 CRO reports share grant and 10b5-1 sale

ON24 Inc.’s Chief Revenue Officer James Blackie reported two common stock transactions.

Rhea-AI Filing Summary

ON24 Inc.’s Chief Revenue Officer James Blackie reported two common stock transactions. On February 26, 2026, he acquired 25,157 shares as a grant at $0.00 per share. On March 2, 2026, he sold 20,277 shares at a weighted average price of $8.0114 per share under a Rule 10b5-1 trading plan, with shares sold to cover tax withholding obligations related to restricted stock unit vesting. Following these transactions, he held 484,052 shares of ON24 common stock.

Insider Trade Summary

Net Seller: 20,277 shares

Net Sell 2 txns

Insider Blackie James

Role Chief Revenue Officer

Sold 20,277 shs ($162K)

Type	Security	Shares	Price	Value
Sale	Common Stock	20,277	$8.0114	$162K
Grant/Award	Common Stock	25,157	$0.00	$0.00

Holdings After Transaction: Common Stock — 484,052 shares (Direct)

Footnotes (3)

1. F1. The transaction reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on August 29, 2024.
2. F2. Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $8.00 to $8.02, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Security and Exchange Commission, upon request, full information regarding the number of shares sold in each separate price within the ranges set forth in footnote (3) to this Form 4.

FAQ

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What insider transactions did ON24 (ONTF) CRO James Blackie report?

James Blackie reported a stock grant and a sale of ON24 shares. He received 25,157 common shares at no cost, then sold 20,277 shares at a weighted average price of $8.0114 under a Rule 10b5-1 plan.

How many ON24 (ONTF) shares did James Blackie sell and at what price?

He sold 20,277 ON24 common shares in the open market. The weighted average sale price was $8.0114 per share, with individual trades executed between $8.00 and $8.02, as disclosed in the Form 4 footnote.

How many ON24 (ONTF) shares did James Blackie receive in the recent grant?

He received 25,157 ON24 common shares as a grant at $0.00 per share. This award increased his direct holdings before the subsequent sale that was executed under a pre-established Rule 10b5-1 trading plan.

What is James Blackie’s ON24 (ONTF) share ownership after these transactions?

After the reported grant and sale, James Blackie directly owns 484,052 ON24 common shares. This figure reflects his holdings following the March 2, 2026 open-market sale executed under a Rule 10b5-1 trading plan.

Were James Blackie’s ON24 (ONTF) share sales related to tax withholding?

Yes. A Form 4 footnote states the reported sale represents shares sold to cover tax withholding obligations connected to the vesting of restricted stock units, aligning the transaction with routine tax-related share dispositions.

Were James Blackie’s ON24 (ONTF) share sales pre-planned?

Yes. The Form 4 notes the sale was executed under a Rule 10b5-1 trading plan adopted on August 29, 2024. Such plans allow insiders to schedule trades in advance under predetermined conditions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 03/02/2026 - 09:32 PM EST Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Blackie James

(Last) (First) (Middle)

C/O ON24, INC.

301 HOWARD STREET, SUITE 1100

(Street)

SAN FRANCISCO CA 94105

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ON24 INC. [ ONTF ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Revenue Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/26/2026		A		25,157	A	$0.00	504,329	D
Common Stock	03/02/2026		S(1)(2)		20,277	D	$8.0114(3)	484,052	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The transaction reported in this Form 4 was effected pursuant to a Rule 10B5-1 trading plan adopted by the reporting person on August 29, 2024.

2. Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $8.00 to $8.02, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Security and Exchange Commission, upon request, full information regarding the number of shares sold in each separate price within the ranges set forth in footnote (3) to this Form 4.

Remarks:

	/s/ Blackie James by Charles Rogerson, as Attorney-in-Fact	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.