Filed Pursuant to Rule 424(b)(3)

Registration No. 333-268616

PROSPECTUS SUPPLEMENT NO. 66

(to Prospectus dated May 4, 2024)

MSP RECOVERY, INC.

32,220 Shares of Class A Common Stock

This prospectus supplement no. 66 amends and supplements the prospectus dated May 4, 2024 (as supplemented or amended from time to time, the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (No. 333-268616). This prospectus supplement is being filed to update and supplement the information in the Prospectus with the information contained in our Current Report on Form 8-K, filed with the Securities and Exchange Commission (the “SEC”) on July 31, 2026 (the “Current Report”). Accordingly, we have attached the Current Report to this prospectus supplement.

This prospectus relates to the offer and sale from time to time by the selling securityholders named in this prospectus (the “Selling Securityholders”), or their permitted transferees, of up to 32,220 shares of our Class A Common Stock, par value $0.0001 per share, held by the Selling Securityholders (the “Total Resale Shares”), including up to 15,239 shares of our Class A Common Stock issuable upon exercise of the Class A Common Stock Underlying Warrant (the “CPIA Warrant”) pursuant to an Amendment to the Claim Proceeds Investment Agreement (the “Amendment”) and a Warrant Agreement (the “Warrant Agreement”) with Brickell Key Investments LP (the “CPIA Holder”). As the exercise price of the CPIA Warrant is only $0.4375 per share, should the CPIA Holder exercise the CPIA Warrant, we would only receive nominal proceeds therefrom.

Our Common Stock, Public Warrants and New Warrants are eligible for unsolicited quotations on the OTC Markets Group’s Expert Market under the symbols “MSPR,” “MSPRZ,” and “MSPRW,” respectively. Quotations for securities on the Expert Market are not publicly available, and our securities do not have an active public trading market. Accordingly, current closing prices for our Common Stock, Public Warrants, and New Warrants are not publicly available.

Effective at 11:59 PM EDT on September 1, 2025, the Company amended its Second Amended and Restated Certificate of Incorporation filed with the Secretary of State of the State of Delaware to effect a 1-for-7 reverse stock split of the Company’s common stock (the “Reverse Split”). Unless otherwise noted, the share and per share information in this Prospectus Supplement No. 66 have been adjusted to give effect to the Reverse Split.

Investing in our securities involves risks. Before you invest in our securities, please carefully read the information provided in the “Risk Factors” section beginning on page 9 of the Prospectus and any in any applicable prospectus supplement, and Item IA of our Annual Report on Form 10-K for the fiscal year ending December 31, 2024, filed with the SEC on April 16, 2025.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued under the Prospectus or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is July 31, 2026.

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): July 17, 2026

MSP Recovery, Inc.

(Exact name of registrant as specified in its charter)

(305) 614-2222

(Registrant’s telephone number, including area code)

(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:

Securities registered pursuant to Section 12(b) of the Act:

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 ☐

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. ☐

Item 1.01. Entry into a Material Definitive Agreement

Hazel Partners Holdings, LLC Funding

On July 17, 2026, MSP Recovery, Inc. (the “Company”), through its subsidiaries, entered into a letter agreement with Hazel Partners Holdings LLC (“Hazel”), in its capacity as administrative agent and lender under the Company’s existing working capital credit facility (the “July 17 Letter Agreement”) to provide $0.07 million to be used primarily for operating expenses.

On July 29, 2026, the Company, through its subsidiaries, entered into a letter agreement with Hazel, in its capacity as administrative agent and lender under the Company’s existing working capital credit facility (the “July 29 Letter Agreement,” and with the July 17 Letter Agreement, the “Hazel Letter Agreements”) to provide $0.05 million to be used primarily for operating expenses.

As previously disclosed in the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025 (the “Q3-2025 Form 10-Q”), the Company is party to a working capital credit facility with Hazel (the “Working Capital Credit Facility”), which includes a discretionary funding mechanism referred to as the Operational Collection Floor. Advances under the Operational Collection Floor are made solely at Hazel’s discretion, are not subject to any commitment or minimum availability, and are conditioned on the satisfaction or waiver of applicable conditions under the governing credit documentation. The Working Capital Credit Facility does not provide the Company with committed liquidity, does not establish a borrowing base, and does not obligate Hazel to fund any amounts.

As of the filing of the Q3-2025 Form 10-Q, the Company disclosed that aggregate advances under the Operational Collection Floor had reached approximately $6.0 million, and that no remaining funding capacity was available under the facility at that time.

Pursuant to the Hazel Letter Agreements, Hazel has agreed, in its sole discretion, to make two, one-time advances of $0.07 million and $0.05 million, respectively, to increase the Operational Collection Floor beyond the previously disclosed level. The advances were funded on July 20, 2026 and July 29, 2026, respectively, subject to the conditions set forth in the Hazel Letter Agreements and the underlying credit agreement, including the absence of any event of default or default at the time of funding.

The Hazel Letter Agreements are standalone accommodations and do not reinstate, replenish, or otherwise reopen availability under the Working Capital Credit Facility or the Operational Collection Floor. Other than these specific advances, no additional funding is currently available to the Company under the Working Capital Credit Facility, and the Company has no rights to, and no reasonable basis to expect, any further advances thereunder. The Hazel Letter Agreements do not modify the discretionary nature of the facility, do not create any commitment for future funding, and do not provide the Company with access to ongoing or recurring liquidity.

The Company cautions that the receipt of funding pursuant to the Hazel Letter Agreements should not be viewed as indicative of Hazel’s willingness to provide future funding, the availability of additional liquidity, or the Company’s ability to meet its operating or debt service obligations beyond the funding of this specific amount.

The foregoing description of the Hazel Letter Agreements does not purport to be complete and is qualified in its entirety by reference to the Hazel Letter Agreements, and a copy of each is filed as an exhibit to this Current Report on Form 8-K.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

To the extent required by Item 2.03 of Form 8-K, the information contained in Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.