RTB · RTB Digital, Inc.

BFF Ltd. Is a controlled entity under common control with Mr. Madhavji and, as such, he may be deemed to have beneficial ownership over BFF Ltd.'s entire holding of 233,410 shares of Common Stock. Mr. Madhavji disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, if any.

On June 4, 2026, 145,881 shares of Common Stock were issued to BFF Ltd. Upon the cash exercise of stock options to purchase 145,881 shares of Common Stock at an exercise price of $1.89 per share.

Following the reported transaction, the Reporting Person, through BFF Ltd., continues to hold stock options to purchase 182,351 shares of Common Stock at $1.89 per share, with vesting and expiration dates ranging from August 1, 2026 to August 1, 2028.

Represents a restricted stock award originally granted by RTB Digital, Inc. on October 10, 2025, which was assumed by the Issuer in connection with the business combination between the Issuer and RTB Digital, Inc. Following the transaction, the award was converted into 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 shares, and continues to vest in accordance with its original vesting schedule, subject to the Reporting Person's continued service with the Issuer.

On August 18, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Nisanrrez 17,241 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of August 2025, whereby the shares granted shall vest on 02/14/2026. The issuance of shares occurred on August 20, 2025.

On July 25, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Nisan 14,705 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of July 2025, whereby the shares granted shall vest on 01/21/2026. The issuance of shares occurred on August 20, 2025.

On June 4, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Nisan 7,142 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of May 2025, whereby the shares granted shall vest on 12/01/2025. The issuance of shares occurred on August 20, 2025.

On August 18, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Errez 17,241 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of August 2025, whereby the shares granted shall vest on 02/14/2026. The issuance of shares occurred on August 20, 2025.

On July 3, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Errez 7,352 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of June 2025, whereby the shares granted shall vest on 12/30/2025. The issuance of shares occurred on August 20, 2025.

On July 3, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Nisan 7,352 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of June 2025, whereby the shares granted shall vest on 12/30/2025. The issuance of shares occurred on August 20, 2025.

On June 4, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Errez 7,142 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of May 2025, whereby the shares granted shall vest on 12/01/2025. The issuance of shares occurred on August 20, 2025.

On July 25, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Errez 14,705 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan for the month of July 2025, whereby the shares granted shall vest on 01/21/2026. The issuance of shares occurred on August 20, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

Represents withholding of shares of common stock for the tax liability associated with the vesting of the registered shares granted on February 15, 2025 for February 2025 compensation.

Represents withholding of shares of common stock for the tax liability associated with the vesting of the registered shares granted on February 15, 2025 for February 2025 compensation.

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.

Represents withholding of shares of common stock for the tax liability associated with the vesting of the registered shares granted on January 30, 2025 for January 2025 compensation.

The Reporting Person inadvertently executed this sale transaction and will remit to the Issuer any profits received in connection therewith and in compliance with Section 16(b) of the Securities Exchange Act of 1934. Upon request of the SEC Staff, the Reporting Person shall make available for review the relevant correspondence with the Issuer in relation to this matter.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.70 to $0.73, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in (2) to this Form 4.

The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold.

These shares were sold in multiple transactions at the price set forth in column 4. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.523 to $0.58, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in (2) to this Form 4.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.58 to $0.5925, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in (2) to this Form 4.

Represents withholding of shares of common stock for the tax liability associated with the vesting of a portion of the restricted stock units awarded on April 8, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.56 to $0.593, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in (2) to this Form 4.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 136,000 restricted stock units for Mr. Oliva. This grant has a 3-year vesting with a five-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 3/15/2027.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 190,000 restricted stock units for Mr. Nisan. This grant has a 3-year vesting with a one-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 2/15/2028.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 45,000 restricted stock units for Mr. Kirscher. This grant has a 3-year vesting with a five-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 3/15/2027.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 190,000 restricted stock units for Mr. Errez. This grant has a 3-year vesting with a one-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 2/15/2028.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 136,000 restricted stock units for Mr. Oliva. This grant has a 3-year vesting with a one-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 2/15/2028.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 190,000 restricted stock units for Mr. Errez. This grant has a 3-year vesting with a five-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 3/15/2027.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 190,000 restricted stock units for Mr. Nisan. This grant has a 3-year vesting with a five-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 3/15/2027.

In accordance with the Amended and Restated 2023 Equity Incentive Plan, the Board of Directors approved a grant of 45,000 restricted stock units for Mr. Kirscher. This grant has a 3-year vesting with a one-quarter cliff vesting on 5/15/2025. This grant will be fully vested on 2/15/2028.

On February 15, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Errez 3,968 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan, whereby the shares granted shall vest on 8/14/2025.

On February 15, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Nisan 3,968 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan, whereby the shares granted shall vest on 8/14/2025.

On February 15, 2025, as part of his monthly compensation as a director of the Company, the Board of Directors of the Company granted Mr. Montoya 3,968 shares of Common Stock pursuant to the Company's 2023 Equity Incentive Plan, whereby the shares granted shall vest on 8/14/2025.