Material Agreement Form 8 K

Item 1.01

Entry into a Material Definitive Agreement.

On September 23, 2024, Laboratory Corporation of America Holdings (the "Issuer") entered into a base indenture with U.S. Bank Trust Company, National Association, as trustee (the "Trustee") (the "Indenture"). On September 23, 2024, Labcorp Holdings Inc. (the "Company"), the Issuer and the Trustee entered into supplemental indentures to the Indenture under which the Issuer issued, and the Company guaranteed, $2,000,000,000 in debt securities, consisting of $650,000,000 aggregate principal amount of 4.350% Senior Notes due 2030 (the "2030 Notes"), $500,000,000 aggregate principal amount of 4.550% Senior Notes due 2032 (the "2032 Notes") and $850,000,000 aggregate principal amount of 4.800% Senior Notes due 2034 (the "2034 Notes" and, together with the 2030 Notes and the 2032 Notes, the "Notes"). Interest on the Notes is payable semi-annually on April 1 and October 1 of each year, commencing April 1, 2025.

The 2030 Notes were issued pursuant to the First Supplemental Indenture dated as of September 23, 2024, under the Indenture (the "2030 Notes Supplemental Indenture"), the 2032 Notes were issued pursuant to the Second Supplemental Indenture dated as of September 23, 2024, under the Indenture (the "2032 Notes Supplemental Indenture") and the 2034 Notes were issued pursuant to the Third Supplemental Indenture dated as of September 23, 2024, under the Indenture (the "2034 Notes Supplemental Indenture," and together with the 2030 Notes Supplemental Indenture and the 2032 Notes Supplemental Indenture, the "Supplemental Indentures").

The Notes were issued in a public offering pursuant to an effective shelf registration statement on Form S-3(File Nos. 333-279510and 333-279510-01)filed with the Securities and Exchange Commission (the "Commission") on May 17, 2024 and the base prospectus included in that registration statement as supplemented by the final prospectus supplement dated September 16, 2024, as filed on September 18, 2024 pursuant to Rule 424(b)(5) under the Securities Act of 1933, as amended (the base prospectus, as supplemented by the prospectus supplement, the "Prospectus").

The Indenture and the Supplemental Indentures contain certain covenants that, among other things, limit the ability of the Issuer and its subsidiaries, subject to exceptions, to create or assume Liens, enter into sale and leaseback transactions, and incur indebtedness or issue preferred stock at the subsidiary level. These covenants are subject to a number of important exceptions and qualifications. The Indenture and the Supplemental Indentures also provide for customary events of default which, if any of them occurs, would permit or require the principal of and accrued interest on the Notes to become or to be declared due and payable.

Prior to (i) March 1, 2030 with respect to the 2030 Notes, (ii) February 1, 2032 with respect to the 2032 Notes and (iii) July 1, 2034 with respect to the 2034 Notes (each such date, a "Par Call Date"), the Issuer may redeem the Notes in whole or in part, at any time or from time to time, at the Issuer's option and sole discretion, at a redemption price equal to the greater of:

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100% of the principal amount of the Notes being redeemed; and

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a make-whole premium calculated in accordance with the Indenture,

plus, in either case, accrued and unpaid interest thereon to the redemption date.

Notwithstanding the foregoing, on or after the applicable Par Call Date, the redemption price will be equal to 100% of the principal amount of the Notes being redeemed, plus accrued and unpaid interest thereon to the redemption date.

The foregoing description is a summary of the terms of the Indenture, the Supplemental Indentures, and the Notes and does not purport to be a complete statement of the parties' rights and obligations thereunder. The foregoing description is qualified in its entirety by reference to the full text of the Indenture, the First Supplemental Indenture, the Second Supplemental Indenture and the Third Supplemental Indenture, as applicable (including the forms of Notes), copies of which are attached as Exhibits 4.1, 4.2, 4.3, 4.4, 4.5, 4.6 and 4.7 to this Current Report on Form 8-Kand are incorporated by reference herein.

The Issuer expects that the net proceeds from the offering of the Notes will be approximately $1,982.1 million after deducting underwriting discounts and other estimated expenses of the offering. The Issuer expects to use the net proceeds to redeem or repay indebtedness and, to the extent not used for such purpose, for other general corporate purposes. Indebtedness to be redeemed or repaid at or prior to maturity is expected to include the issuer's outstanding 2.300% Senior Notes due 2024, its 3.600% Senior Notes due 2025 and $350 million of borrowings under its revolving credit facility.