[144] Cartesian Therapeutics, Inc. SEC Filing

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Form 144 notice concerning proposed sales of Common stock tied to restricted stock vesting under a registered plan. The excerpt lists proposed sale entries with dates 01/02/2025 and 01/02/2026, and a filing-related date of 06/02/2026.

The notice identifies amounts and line items such as 3924, 1,235, and 2,689 associated with the vesting entries; the filing shows the broker name and NASDAQ as the market. Timing and cash‑flow treatment for any transactions are not specified in the provided excerpt.

Insights

Securities Regulation Specialist

Form 144 lists proposed resale of vested restricted stock under a registered plan.

The excerpt shows restricted stock vesting events dated 01/02/2025 and 01/02/2026 with associated numeric line items. Form 144 is a notice of intent to sell; it does not itself effect a sale.

Settlement mechanics and proceeds recipients are not detailed in the excerpt; subsequent filings or broker disclosures would show actual transactions and cashflow.

Equity Compensation Advisor

Entries appear tied to compensation vesting rather than open-market purchases.

The document labels the securities as "Restricted stock vesting under a registered plan" and lists service-vesting dates with numeric entries (e.g., 01/02/2025, 01/02/2026). That indicates compensation origin of the shares.

Whether shares are sold or retained after vesting depends on the holder; the provided excerpt does not show sale quantities executed or net proceeds.

Key Figures

Broker line item: 3924 Numeric entry: 25,152.84 Large numeric entry: 29,382,000 +3 more

6 metrics

Broker line item 3924 appears in the broker/line row associated with the filing

Numeric entry 25,152.84 appears on the same line as broker and market (raw excerpt value)

Large numeric entry 29,382,000 appears on the same line as broker and market (raw excerpt value)

Form-related date 06/02/2026 date associated with the broker/market line

Vesting entry shares (example) 1,235 listed next to vesting date <date>01/02/2026</date> for restricted stock vesting

Vesting entry shares (example) 2,689 listed next to vesting date <date>01/02/2025</date> for restricted stock vesting

Key Terms

Restricted stock vesting, Form 144, Registered plan

3 terms

Restricted stock vesting financial

"Restricted stock vesting under a registered plan"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Form 144 regulatory

"Filer Information ... 144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Registered plan financial

"Restricted stock vesting under a registered plan"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	3924	25152.84	29382000	06/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/02/2026	Restricted stock vesting under a registered plan	Issuer			1235	01/02/2026	Services Rendered
Common	01/02/2025	Restricted stock vesting under a registered plan	Issuer			2689	01/02/2025	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)