Cartesian Therapeutics, Inc. — Director's Dealing 2025

Oct 28, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Cartesian Therapeutics, Inc. (RNAC)
CIK: 0001453687
Period of Report: 2025-10-27

Reporting Person: Seymour June Ann (Chief Accounting Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-27	Employee Stock Option (right to buy)	$8.85	A	50000	Acquired	2035-10-27	Common Stock (50000)	Direct

Footnotes

F1: This option vests as to 25% on October 27, 2026. The remainder of the underlying shares will vest in three equal annual installments thereafter so that the underlying shares will be fully vested on October 27, 2029.