Company: RNAC
Filing Date: 2025-01-10
Form Type: POS AM
Source: 0001140361-25-000680
Chunk: 2

Company: Cartesian Therapeutics, Inc.
Filing Date: 2025-01-10
Form: POS AM
Chunk 2
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 units, and securities as may be issuable upon conversion, redemption, repurchase, exchange or exercise of any of the foregoing (collectively, the “Registered Securities”). No Registered Securities were issued and sold pursuant to the Original Registration Statement. As of the date hereof, the Company meets the eligibility requirements of Form S-3 and therefore intends to file a new Registration Statement on Form S-3 (the “New Registration Statement”). The New Registration Statement is being filed to replace the Original 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 Securities that remain unsold under the Original Registration Statement as of the date thereof. 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.