June Ann Seymour - 27 Oct 2025 Form 4 Insider Report for Cartesian Therapeutics, Inc. (RNAC)

Role
Chief Accounting Officer
Signature
/s/ Matthew Bartholomae, Attorney-in-Fact for June Ann Seymour
Issuer symbol
RNAC
Transactions as of
27 Oct 2025
Net transactions value
$0
Form type
4
Filing time
28 Oct 2025, 16:05:51 UTC
Next filing
06 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Seymour June Ann Chief Accounting Officer C/O CARTESIAN THERAPEUTICS, INC., 7495 NEW HORIZON WAY, FREDERICK /s/ Matthew Bartholomae, Attorney-in-Fact for June Ann Seymour 28 Oct 2025 0002093716

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction RNAC Employee Stock Option (right to buy) Award $0 +50,000 $0.000000 50,000 27 Oct 2025 Common Stock 50,000 $8.85 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.