# EDGAR Filing Document

**Accession Number:** 0002123991
**File Stem:** 0001185185-26-002510
**Filing Date:** 2026-6
**Character Count:** 6899
**Document Hash:** 6b4278781393472a6a292547ad925697
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001185185-26-002510.hdr.sgml**: 20260615

**ACCESSION NUMBER**: 0001185185-26-002510

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260521

**FILED AS OF DATE**: 20260615

**DATE AS OF CHANGE**: 20260615

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Comer James Lamar Walton
- **CENTRAL INDEX KEY:** 0002123991

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34294
- **FILM NUMBER:** 261090681

**MAIL ADDRESS:**
- **STREET 1:** 3131 CAMINO DEL RIO N
- **STREET 2:** SUITE 1400
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92108
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RTB Digital, Inc.
- **CENTRAL INDEX KEY:** 0001419275
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3131 CAMINO DEL RIO NORTH, SUITE 1400
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92108
- **BUSINESS PHONE:** 619-631-8261

**MAIL ADDRESS:**
- **STREET 1:** 3131 CAMINO DEL RIO NORTH, SUITE 1400
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92108

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RYVYL Inc.
- **DATE OF NAME CHANGE:** 20221013

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GreenBox POS
- **DATE OF NAME CHANGE:** 20190222

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GreenBox POS, LLC
- **DATE OF NAME CHANGE:** 20180613

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Comer James Lamar Walton<br><sub>(Last) (First) (Middle)</sub><br>3111 CAMINO DEL RIO NORTH, SUITE 400<br><sub>(Street)</sub><br>SAN DIEGO, CA 92108<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>RTB Digital, Inc. [ RTB ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-05-21 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common stock, par value $0.001 | 53048 | I | By Media Innovation Fund I LLC<sup>(1)</sup> |
| Common stock, par value $0.001 | 3494888 | I | By Comer Trading, LLC<sup>(2)</sup> |
| Common stock, par value $0.001 | 233049 | I | By Comer Trading, LLC<sup>(2)</sup> |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Stock Options<sup>(3)</sup> | 2028-08-12 | 2035-08-12 | Common Stock, par value $0.001 | 72941 | $1.89 | I | Comer Trading, LLC |
| Warrant to purchase common stock<sup>(4)</sup> | 2025-09-04 | 2026-09-04 | Common Stock, par value $0.001 | 698978 | $4.29 | I | Comer Trading, LLC |

---

### Footnotes:

(1) 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.

(2) 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.

(3) 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.

(4) 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.

**Signature:** /s/ WaltonComer  
**Date:** 2026-06-15

### Remarks:

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.**