Company: BTBT
Filing Date: 2025-09-29
Form Type: 424B5
Source: 0001213900-25-093122
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Company: Bit Digital, Inc
Filing Date: 2025-09-29
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 SEPTEMBER 29, 2025</div>

PROSPECTUS SUPPLEMENT
(to Prospectus dated June 20, 2025)

<div align='center'>$100,000,000

Bit Digital, Inc.

% Convertible Senior Notes due 2030

Convertible into ordinary shares</div>

We are offering $100,000,000
principal amount of our %
Convertible Senior Notes due 2030 (the “notes”). The notes will bear interest at a rate of %
per year, payable semiannually in arrears on April 1 and October 1 of each year, beginning on April 1, 2026. The notes will mature on
October 1, 2030, unless earlier converted, redeemed or repurchased.

Holders may convert their notes at their option prior to the close of business on the second scheduled trading day immediately preceding the maturity date. Upon conversion, we will pay or deliver, as the case may be, cash, ordinary shares, or a combination of cash and ordinary shares, at our election, as described in this prospectus supplement.

The conversion rate will initially
be ordinary shares per $1,000 principal amount of notes (equivalent to an initial conversion price of approximately $ per ordinary share).
The conversion rate will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition,
following certain corporate events that occur prior to the maturity date or following our delivery of a notice of optional redemption,
we will, in certain circumstances, increase the conversion rate for a holder who elects to convert its notes in connection with such a
corporate event or convert its notes called (or deemed called) for redemption in connection with such notice of optional redemption, as
the case may be. We will also increase the conversion rate for a holder who elects to convert its notes during the period from, and including,
the date that is six months after the last date of original issuance of the notes until the close of business on the