[Form 3] RTB Digital, Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

RTB Digital, Inc. director Alexander Michael Lewis reported his initial ownership in a Form 3. He holds 53,048 shares of common stock and stock options tied to 72,941 underlying common shares. These options have an exercise price of $1.89 per share and expire in 2035. The options were originally granted on August 12, 2025 and were assumed in a business combination, continuing to vest under the original schedule as long as he remains in service with the company.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Alexander Michael Lewis

Role null

Type	Security	Shares	Price	Value
holding	Stock Options	--	--	--
holding	Common stock, par value $0.001	--	--	--

Holdings After Transaction: Stock Options — 72,941 shares (Direct, null); Common stock, par value $0.001 — 53,048 shares (Direct, null)

Footnotes (1)

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SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Alexander Michael Lewis

(Last) (First) (Middle)

3111 CAMINO DEL RIO NORTH, SUITE 400

(Street)

SAN DIEGO 92108

(City) (State) (Zip)

CHINA

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
05/21/2026

3. Issuer Name and Ticker or Trading Symbol
RTB Digital, Inc. [ RTB ]

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common stock, par value $0.001	53,048	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options(1)	08/12/2028	08/12/2035	Common Stock, par value $0.001	72,941	$1.89	D

Explanation of Responses:

1. 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.

	/s/ Michael Alexander	05/29/2026
	** 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 5 (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.
* Form 3: SEC 1473 (03-26)