Company: BTBT
Filing Date: 2025-06-25
Form Type: 424B5
Source: 0001213900-25-057815
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Company: Bit Digital, Inc
Filing Date: 2025-06-25
Form: 424B5
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Filed Pursuant to Rule 424(b)(5)

Registration Statement No.: 333-286841

The information contained in this preliminary prospectus supplement and the accompanying prospectus is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not a solicitation of an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

<div align='center'>SUBJECT TO COMPLETION, DATED JUNE 25, 2025</div>

PROSPECTUS SUPPLEMENT
(to Prospectus dated June 20, 2025)

<div align='center'>Ordinary Shares

Bit Digital, Inc.</div>

We are offering of
our ordinary shares, par value $.01 (“ordinary shares”), pursuant to this prospectus supplement and the accompanying prospectus.

Sam Tabar, our Chief Executive
Officer, and other members of Company management have agreed to purchase up to ordinary
shares in this offering on the same terms as the other investors participating in the offering.

Our ordinary shares are listed
on the Nasdaq Capital Market (“Nasdaq”) under the symbol “BTBT.” On June 24, 2025, the last reported sale price
of our ordinary shares on Nasdaq was $2.44.

We are a “smaller reporting
company” under applicable Securities and Exchange Commission, or the SEC, rules and, as such, have elected to comply with certain
reduced public company disclosure requirements for this prospectus supplement. See “Prospectus Supplement Summary—Smaller
Reporting Company” on page S-2 of this prospectus supplement for more information.

Investing in our ordinary shares involves a high degree of risk. Please read “Risk Factors” beginning on page S-4 of this prospectus supplement, on page 4 of the accompanying prospectus and in the documents incorporated by reference into this prospectus supplement and the accompanying prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

|                                 |     | PER SHARE |     | TOTAL |
|:--------------------------------|:----|:----------|:----|:------|
| Public offering price           |     | $         |     | $     |
| Underwriting discount(1)        |     | $         |     | $     |
| Proceeds to us