Cartesian Therapeutics, Inc. — Director's Dealing 2025

Jan 6, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Cartesian Therapeutics, Inc. (RNAC)
CIK: 0001453687
Period of Report: 2025-01-02

Reporting Person: Singer Michael (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-01-02	Common Stock	A	2600	—	Acquired	73533	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-01-02	Stock Option (Right to Buy)	$16.93	A	7800	Acquired	2035-01-01	Common Stock (7800)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	383796	Indirect
Common Stock	56719	Indirect
Common Stock	7127	Indirect
Common Stock	14788	Indirect
Common Stock	96219	Indirect
Common Stock	96219	Indirect

Footnotes

F1: Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in full on January 2, 2026.

F2: Shares are held in a trust for the benefit of the reporting person's spouse and children. The reporting person's spouse is a trustee of the trust.

F3: Shares are held in a trust for which the reporting person is a beneficiary. The reporting person is a trustee of the trust.

F4: Shares are held in a trust for which the reporting person is a beneficiary. The reporting person's spouse is a trustee of the trust.

F5: Shares are held by the reporting person's spouse.

F6: The shares are held for LS, the child of the reporting person, through a custodial account established pursuant to the Uniform Transfer to Minors Act ("UTMA") for which the reporting person serves as custodian.

F7: The shares are held for SS, the child of the reporting person, through a custodial account established pursuant to the UTMA for which the reporting person serves as custodian.