Company: SBXD
Filing Date: 2025-08-07
Form Type: 425
Source: 0001104659-25-075274
Chunk: 12

Company: SilverBox Corp IV
Filing Date: 2025-08-07
Form: 425
Chunk 12
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 restrictions on transfer and redemption of SPAC Ordinary Shares in connection with the Transactions,
(iv) waive any rights to adjustment or other anti-dilution or similar protections with respect to the rate that the SPAC Class B Ordinary
Shares held by Sponsor will convert into SPAC Class A Ordinary Shares in connection with the Business Combination and the Transactions,
and (v) effective as of the Closing, release any claims against SPAC, Pubco, the Company, SPAC Merger Sub and Company Merger Sub with
respect to any matter arising at or prior to the Closing, subject to customary exceptions and existing contractual rights.

The Sponsor Support Agreement is filed as Exhibit 10.1 to this Current Report on Form 8-K, and the foregoing description thereof is qualified in its entirety by reference to the full text of the Sponsor Support Agreement and the terms of which are incorporated by reference herein.

Sponsor Letter Agreement

As previously disclosed in the Initial Current Report, contemporaneously with the
execution of the Business Combination Agreement, SPAC entered into a Sponsor Letter Agreement with Sponsor and Pubco (the “Sponsor Letter Agreement”), pursuant to which, among other things, the Sponsor will deposit up to 150,000 Sponsor Earnout Shares into
an escrow account, such shares to be released from escrow in accordance with the following:

| · | Two-thirds (2/3) of the Sponsor Earnout Shares will be released if the VWAP of the Pubco Class A Stock                             
 equals or exceeds $12.50 per share for any 20 trading days within any consecutive 30-trading day period during the Earnout Period. |

| · | One-third (1/3) of the Sponsor Earnout Shares will be released if the VWAP of the Pubco Class A Stock                              
 equals or exceeds $15.00 per share for any 20 trading days within any consecutive 30-trading day period during the Earnout Period. |

All of the Sponsor Earnout
Shares will be accelerated and released if Pubco is subject to a Qualified Change of Control.

In addition, the Sponsor will
use its commercially reasonable efforts to facilitate SPAC, the Company and/or Pubco or their respective subsidiaries entering into Additional
Financing Transactions as contemplated by the Business Combination Agreement.

The Sponsor Letter Agreement is filed as Exhibit 10.2 to this Current Report on Form 8-K, and the foregoing description thereof is qualified in its entirety by reference to the full text of the Sponsor Letter Agreement and the terms of which are incorporated by reference herein