Key facts
- This page summarizes Comer James Lamar Walton's Form 3 filing for RTB Digital, Inc. (RTB).
- 0 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 15 Jun 2026, 16:01.
Comer James Lamar Walton - 21 May 2026 Form 3 Insider Report for RTB Digital, Inc. (RTB)
- Reporting relationship
- Director
- Issuer ticker
- RTB
- Reported as of
- 21 May 2026
- Net transaction value
- $0
- Reporting owner signature
- /s/ WaltonComer
Source evidence
Original filing metadata and source links for verification.
3 source fields
Reporting owner
1 detail
Key filing fact
Comer James Lamar Walton filed Form 3 for RTB Digital, Inc. (RTB) on 15 Jun 2026.
Change
- No earlier filing in this sequence is available for direct comparison.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Official SEC source
View source filing
Ownership activity is grounded in SEC Form 3 disclosures.
Reporting Owners (1)
CIK 0002123991
Primary reporting owner
Comer James Lamar Walton
- Relationship
- Director
- Address
- 3111 CAMINO DEL RIO NORTH, SUITE 400, SAN DIEGO
- Signature
- /s/ WaltonComer
- Signature date
- 15 Jun 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
RTB
holding
Common stock, par value $0.001
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 53,048
- Date
- 21 May 2026
- Ownership
- By Media Innovation Fund I LLC
- Footnotes
- F1
RTB
holding
Common stock, par value $0.001
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,494,888
- Date
- 21 May 2026
- Ownership
- By Comer Trading, LLC
- Footnotes
- F2
RTB
holding
Common stock, par value $0.001
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 233,049
- Date
- 21 May 2026
- Ownership
- By Comer Trading, LLC
- Footnotes
- F2
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
RTB
holding
Derivative
Stock Options
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 21 May 2026
- Ownership
- Comer Trading, LLC
- Underlying class
- Common Stock, par value $0.001
- Underlying amount
- 72,941
- Exercise price
- $1.89
- Footnotes
- F3
RTB
holding
Derivative
Warrant to purchase common stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 21 May 2026
- Ownership
- Comer Trading, LLC
- Underlying class
- Common Stock, par value $0.001
- Underlying amount
- 698,978
- Exercise price
- $4.29
- Footnotes
- F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
As controlling member of Media Innovation Fund I LLC, Mr. Comer has influence over Media Innovation Fund I LLC's entire holding of 53,048 shares of Common Stock and deemed to be the beneficial owner. Mr. Comer disclaims beneficial ownership except to the extent of his pecuniary interest.
Footnote F2
As controlling member of Comer Trading, LLC, Mr. Comer has influence over Comer Trading, LLC's entire holding of 3,494,888 shares of Common Stock and deemed to be the beneficial owner. Mr. Comer disclaims beneficial ownership except to the extent of his pecuniary interest.
Footnote F3
Represents a stock option originally granted by RTB Digital, Inc. on August 12, 2025, which was assumed by the Issuer in connection with the business combination between the Issuer and RTB Digital, Inc. Following the transaction, the option became exercisable for shares of the Issuer's common stock on substantially the same terms as in effect immediately prior to the transaction, with appropriate adjustments to the number of underlying shares and exercise price, and continues to vest in accordance with its original vesting schedule, subject to the Reporting Person's continued service with the Issuer. Mr. Comer disclaims beneficial ownership except to the extent of his pecuniary interest.
Footnote F4
Represents a common stock purchase warrant originally issued by RTB Digital, Inc. on September 4, 2025, which was assumed by the Issuer in connection with the business combination between the Issuer and RTB Digital, Inc. Following the transaction, the warrant became exercisable for shares of the Issuer's common stock on substantially the same terms as in effect immediately prior to the transaction, with appropriate adjustments to the number of underlying shares and exercise price and is exercisable immediately and expiring on September 4, 2026. Mr. Comer disclaims beneficial ownership except to the extent of his pecuniary interest.