Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the use in the Prospectus constituting a part of this Registration Statement on Form S-1 of our report dated June 18, 2024, relating to the financial statements of Silverbox Corp IV, as of April 23, 2024 and for the period from April 16, 2024 (inception) through April 23, 2024, which is contained in that Prospectus. We also consent to the reference to our firm under the caption “Experts” in the Prospectus.

/s/ WithumSmith+Brown, PC

New York, New York 

June 18, 2024