Common Stock, par value $0.0001 per share

Cross Country Healthcare Inc

6551 Park of Commerce Boulevard, N.W., Boca Raton, FL, 33487

The persons filing this Statement are Magnetar Financial LLC, a Delaware limited liability company ("Magnetar Financial"), Magnetar Capital Partners LP, a Delaware limited partnership ("Magnetar Capital Partners"), Supernova Management LLC, a Delaware limited liability company ("Supernova Management"), and David J. Snyderman ("Mr. Snyderman") (collectively, the "Reporting Persons"). This Statement relates to Shares held for the accounts of each of (i) Magnetar PRA Master Fund Ltd ("PRA Master Fund"); (ii) Magnetar Systematic Multi-Strategy Master Fund Ltd, ("Systematic Master Fund"); (iii) Magnetar Relative Value Master Fund Ltd, ("Relative Value Master Fund"); all Cayman Islands exempted companies and (iv) two Managed Accounts for the client of Magnetar Asset Management LLC ("the Managed Account"), collectively (the "Funds"). Magnetar Financial is a Securities and Exchange Commission ("SEC") registered investment adviser under Section 203 of the Investment Advisers Act of 1940, as amended, and manager of investment funds and managed accounts. Magnetar Financial serves as investment adviser to each of the Funds. In such capacity, Magnetar Financial exercises voting and investment power over the Shares held for the accounts of each of the Funds. Magnetar Capital Partners serves as the sole member and parent holding company of Magnetar Financial. Supernova Management is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is Mr. Snyderman. Magnetar Asset Management LLC ("Magnetar Asset Management") is an SEC registered investment adviser and an affiliate of Magnetar Financial. Magnetar Capital Partners serves as the sole member and parent holding company of Magnetar Asset Management.

The business address of each of the Reporting Persons is 1603 Orrington Avenue, 13th Floor, Evanston, Illinois 60201.

Each of the Funds is a private investment fund; Magnetar Financial is a privately-held SEC registered investment adviser and manager of investment funds; Magnetar Capital Partners is a privately-held limited partnership and serves as the sole member and parent holding company of Magnetar Financial; Supernova Management is a privately-held limited liability company and is the general partner of Magnetar Capital Partners; and Mr. Snyderman is a citizen of the United States of America, manager of Supernova Management and Chief Executive Officer of Magnetar Financial.

None of the Reporting Persons has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which such Reporting Person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Magnetar Financial is a Delaware limited liability company. Magnetar Capital Partners is a Delaware limited partnership. Supernova Management is a Delaware limited liability company. Mr. Snyderman is a citizen of the United States of America.

The Company reported in their Schedule 14A Proxy Statement filed October 27, 2025, that 32,759,952 shares were outstanding as of October 14, 2025. As of the close of business December 5, 2025, each of the Reporting Persons may have been deemed to have beneficial ownership of 1,815,542 Shares, which consisted of (i) 1,119,341 Shares held for the benefit of PRA Master Fund, (ii) 477,940 Shares held for the benefit of Systematic Master Fund, (iii) 106,515 Shares held for the benefit of Relative Value Master Fund, and (iv) 111,746 Shares held for the benefit of the Managed Accounts, and all such Shares represented beneficial ownership of approximately 5.54% of the Shares.

As of the close of business December 5, 2025, each of the Reporting Persons may have been deemed to have beneficial ownership of 1,815,542 Shares, which consisted of (i) 1,119,341 Shares held for the benefit of PRA Master Fund, (ii) 477,940 Shares held for the benefit of Systematic Master Fund, (iii) 106,515 Shares held for the benefit of Relative Value Master Fund, and (iv) 111,746 Shares held for the benefit of the Managed Accounts, and all such Shares represented beneficial ownership of approximately 5.54% of the Shares.

Except as set forth on Schedule A attached hereto and Item 6, the Funds had no transactions in the Shares during the 60 days preceding the date of filing of this Statement. All of the transactions set forth on Schedule A attached hereto were effected in the ordinary course of business of Magnetar Financial for the accounts of each of the Funds. The transactions in the Shares set forth on Schedule A were effected in open market transactions on the NASDAQ and various other trading markets. On December 4, 2025, Cross Country Healthcare Cross Country Healthcare, Inc. announced the termination of its Agreement and Plan of Merger with Aya Holdings II Inc., a Delaware corporation, Spark Merger Sub One Inc., a Delaware corporation and a wholly owned subsidiary of Parent. In connection with the termination of the Merger Agreement, Aya Healthcare is required to pay Cross Country Healthcare a termination fee of $20 million.

No other person is known by the Reporting Persons to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any Shares that are beneficially owned by the Reporting Persons.

N/A