UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE TO/A

Tender Offer Statement Pursuant to Section 14(d)(1) or 13(e)(1)

of the Securities Exchange Act of 1934

(Amendment No. 7)

CHIMERIX, INC.

(Name of Subject Company)

PINETREE ACQUISITION SUB, INC.

(Offeror)

JAZZ PHARMACEUTICALS PUBLIC LIMITED COMPANY

(Parent of Offeror)

(Names of Filing Persons)

Common stock, par value $0.001 per share

(Title of Class of Securities)

16934W106

(CUSIP Number of Class of Securities)

Neena M. Patil

Jazz Pharmaceuticals Public Limited Company

Executive Vice President and Chief Legal Officer

Fifth Floor, Waterloo Exchange

Waterloo Road, Dublin 4, Ireland D04 E5W7

011-353-1-634-7800

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons)

With a copy to:

Mark Gordon, Esq.

Victor Goldfeld, Esq.

Wachtell, Lipton, Rosen & Katz

51 West 52^nd Street

New York, NY 10019

(212) 403-1000

☐ Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

☒ third-party tender offer subject to Rule 14d-1.

☐ issuer tender offer subject to Rule 13e-4.

☐ going-private transaction subject to Rule 13e-3.

☐ amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer: ☐

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

☐ Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

☐ Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

This Amendment No. 7 (this “Amendment”) amends and supplements the Tender Offer Statement on Schedule TO filed by Pinetree Acquisition Sub, Inc., a Delaware corporation (“Purchaser”) and an indirect wholly owned subsidiary of Jazz Pharmaceuticals Public Limited Company, an Irish public limited company (“Jazz”), with the U.S. Securities and Exchange Commission on March 21, 2025 (together with any subsequent amendments and supplements thereto, the “Schedule TO”). The Schedule TO relates to the offer by Purchaser to purchase all of the outstanding shares of common stock, par value $0.001 per share (the “Shares”), of Chimerix, Inc., a Delaware corporation (“Chimerix”), in exchange for $8.55 per Share, payable in cash without interest and subject to reduction for any applicable withholding taxes, upon the terms and conditions set forth in the offer to purchase, dated March 21, 2025 (the “Offer to Purchase”), filed as Exhibit (a)(1)(A) to the Schedule TO, and in the related letter of transmittal (the “Letter of Transmittal”), filed as Exhibit (a)(1)(B) to the Schedule TO, which, as each may be amended or supplemented from time to time, collectively constitute the “Offer.”

Except as otherwise set forth in this Amendment, the information set forth in the Schedule TO remains unchanged and is incorporated herein by reference to the extent relevant to the items in this Amendment. Capitalized terms used but not defined herein have the meanings ascribed to them in the Schedule TO.

Item 12. Exhibits.

Item 12 of the Schedule TO is hereby amended and supplemented by adding the following exhibit:

Exhibit No.	Description
(a)(1)(K)	Employee Communication from April 11, 2025

SIGNATURES

After due inquiry and to the best of their knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: April 11, 2025

PINETREE ACQUISITION SUB, INC.
By:	/s/ Andrea Burke
Name:	Andrea Burke
Title:	Vice President

JAZZ PHARMACEUTICALS PUBLIC LIMITED COMPANY
By:	/s/ Philip L. Johnson
Name:	Philip L. Johnson
Title:	Executive Vice President & Chief Financial Officer

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