Company: RNAC
Filing Date: 2025-01-10
Form Type: POS AM
Source: 0001140361-25-000685
Chunk: 2

Company: Cartesian Therapeutics, Inc.
Filing Date: 2025-01-10
Form: POS AM
Chunk 2
---
 originally issued in a private placement to certain institutional and accredited investors and (ii) up to 2,937,903 shares of common stock issuable upon the conversion of 2,937,903 shares of Series B Non-Voting Convertible Preferred Stock, par value $0.0001, issued in such private placement (the 6,501,150 shares of common stock, the “Registered Shares”). The Original Registration Statement was filed while the Company was ineligible to use Form S-3. As of the date hereof, the Company meets the eligibility requirements of Form S-3 and therefore may use its Registration Statement on Form S-3 (File No. 333- 283806), which was filed with the SEC on December 13, 2024and declared effective by the SEC on January 8, 2025 (the “New Registration Statement”). Pursuant to the Company’s undertaking as required by Item 512(a)(3) of Regulation S-K, this Post-Effective Amendment No. 1 is being filed to terminate the effectiveness of the Original Registration Statement and to deregister, as of the effective date of this Post-Effective Amendment No. 1, all the Registered Shares that remain unsold under the Original Registration Statement as of the date thereof. The Registered Shares that remain unsold as of the date of the New Registration Statement are registered under the New Registration Statement. SIGNATURES Pursuant to the requirements of the Securities Act, the Registrant has duly caused this Post-Effective Amendment No. 1 to the Original Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Frederick, State of Maryland, on January 10, 2025.

| CARTESIAN THERAPEUTICS, INC. |                                       |
| By:                          | /s/ Carsten Brunn, Ph.D.              |
|                              | Name: Carsten Brunn, Ph.D.            |
|                              | President and Chief Executive Officer |

Note: No other person is required to sign this Post-Effective Amendment No. 1 to the Original Registration Statement in reliance upon Rule 478 under the Securities Act of 1933, as amended.