SCHEDULE 13D/A

Cartesian Therapeutics Inc

Common Stock, $0.0001 par value per share · CUSIP: 816212302

Event date: 2025-01-13

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Timothy A. SpringerReported CIK 0001055624

  Shares: 9,555,394.00 · Class: 36.9%

• TAS Partners LLCReported CIK 0001677543

  Shares: 563,206.00 · Class: 2.2%

• Chafen Lu

  Shares: 350,740.00 · Class: 1.4%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.