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RNAC · Current Report (Form 8-K) · Filed March 30, 2026

Cartesian Therapeutics Inc — Current Report (Form 8-K)

Form
8-K
Filed
March 30, 2026
Period
Mar 26, 2026
Ticker
RNAC
Accession
0001453687-26-000068
Boardroom Alpha · Filing insights

Board member Murat Kalayoglu resigns, effective March 31, 2026; no disagreement with the company.

About Cartesian Therapeutics Inc
Market cap
$188M
1Y TSR
−28.4%
3Y TSR
−41.7%
Board grade
C
Sector
Healthcare
CEO
Carsten Brunn
Last annual meeting: Jun 12, 2026 · View full Cartesian Therapeutics Inc profile →
rnac-20260326

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
FORM 8-K
 
CURRENT REPORT
 
Pursuant to Section 13 or 15(d) of
the Securities Exchange Act of 1934
 
Date of Report (Date of earliest event reported): March 26, 2026
 
CARTESIAN THERAPEUTICS, INC.
(Exact name of registrant as specified in its charter)
 
Delaware 001-37798 26-1622110
(State or other jurisdiction
of incorporation)
 (Commission
File Number)
 (IRS Employer
Identification No.)
 
7495 New Horizon Way, Frederick, MD 21703
(Address of principal executive offices)(Zip Code)
 
(301) 348-8698
Registrant’s telephone number, including area code
 
N/A
(Former name or former address, if changed since last report)
 
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock (Par Value $0.0001)RNACThe Nasdaq Stock Market LLC
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o



Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On March 26, 2026, Murat Kalayoglu, M.D., Ph.D., a member of the Board of Directors (the “Board”) of Cartesian Therapeutics, Inc. (the “Company”), notified the Company of his intent to resign from the Board, effective as of March 31, 2026, to pursue other opportunities. Prior to his resignation, Dr. Kalayoglu served as Chairman of the Board’s Science and Technology Committee and as a member of the Board’s Nominating and Corporate Governance Committee. In connection with his resignation from the Board, Dr. Kalayoglu will cease service on such committees. Dr. Kalayoglu’s resignation was not the result of a disagreement with the Company on any matter relating to the Company’s operations, policies or practices.
Dr. Kalayoglu served on the Board since 2023. The Company thanks Dr. Kalayoglu for his advice and leadership as a member of the Board and wishes Dr. Kalayoglu well as he pursues other opportunities.



SIGNATURES
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
 
 CARTESIAN THERAPEUTICS, INC.
  
  
Date: March 30, 2026By:/s/ Carsten Brunn, Ph.D.
  Carsten Brunn, Ph.D.
  President, Chief Executive Officer and Chairman of the Board

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Reference

Frequently asked questions

When did Cartesian Therapeutics Inc file this 8-K?
Cartesian Therapeutics Inc (RNAC) filed this Current Report (Form 8-K) with the SEC on March 30, 2026. The accession number assigned by EDGAR is 0001453687-26-000068.
What does an 8-K disclose?
Form 8-K is the SEC's current-report form, used to disclose material events between periodic reports (10-K / 10-Q). Triggers include CEO/CFO departures, acquisitions, bankruptcies, earnings releases, auditor changes, changes in fiscal year, and amendments to corporate governance. Each 8-K is keyed to one or more Item numbers (1.01 through 9.01).
What is the key takeaway from this filing?
Board member Murat Kalayoglu resigns, effective March 31, 2026; no disagreement with the company. This is Boardroom Alpha's one-line summary of the current report; see the full filing text above for the formal disclosure.
What Item codes does an 8-K cover?
An 8-K's Item codes (1.01 through 9.01) specify what kind of event is being disclosed — e.g. Item 1.01 for entering a material agreement, Item 5.02 for departure/election of directors and executive officers, Item 8.01 for other events. The Item codes for this 8-K appear in the filing text above.
Where can I find Cartesian Therapeutics Inc's prior current reports on EDGAR?
The SEC EDGAR browser lists every 8-K Cartesian Therapeutics Inc has filed under CIK 1453687, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.
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