Company: MBIO
Filing Date: 2025-01-15
Form Type: S-1
Source: 0001410578-25-000028
Chunk: 1

Company: MUSTANG BIO, INC.
Filing Date: 2025-01-15
Form: S-1
Chunk 1
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 a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer ☐ |     | Accelerated filer ☐         |
| Non-accelerated filer ☒   |     | Smaller reporting company ☒ |
|                           |     | Emerging growth company ☐   |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is prohibited.

<div align='center'>SUBJECT TO COMPLETION, DATED JANUARY 15, 2025</div>

PRELIMINARY PROSPECTUS

<div align='center'>Up to Shares of Common Stock

Pre-funded Warrants to Purchase up to Shares of Common Stock

Series C-1 Warrants to Purchase up to Shares of Common Stock

Series C-2 Warrants to Purchase up to Shares of Common Stock

Series C-3 Warrants to Purchase up to Shares of Common Stock

Placement Agent Warrants to Purchase up to Shares of Common Stock

Up to Shares of Common Stock Issuable Upon Exercise of

the Series C-1 Warrants, Series C-2 Warrants, Series C-3 Warrants, Pre-funded Warrants and Placement Agent Warrants</div>

We are offering up to shares of common stock, together with accompanying Series C-1 warrants (the “Series C-1 Warrants”) to purchase