Sec Form 4 Filing - DiVincenzo Jonathan P. @ LABORATORY CORP OF AMERICA HOLDINGS - 2023-06-30

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person DiVincenzo Jonathan P. 2. Issuer Name and Ticker or Trading Symbol LABORATORY CORP OF AMERICA HOLDINGS [ LH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, Pres, Central Labs & Intl (Last) (First) (Middle) 531 SOUTH SPRING STREET 3. Date of Earliest Transaction (MM/DD/YY) 06/30/2023 (Street) BURLINGTON, NC27215 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Unit ( 1 ) 06/30/2023 A 3,036 ( 2 ) ( 2 ) Common Stock 3,036 $ 0 4,700 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other DiVincenzo Jonathan P. 531 SOUTH SPRING STREET BURLINGTON, NC27215 EVP, Pres, Central Labs & Intl Signatures /s/ Sandra D. van der Vaart, Attorney-in-Fact for Jonathan P. DiVincenzo 07/05/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each Restricted Stock Unit represents the contingent right to receive one share of Laboratory Corporation of America Holdings Common Stock. ( 2 )In connection with the spin-off ("Spin-Off") of Fortrea Holdings Inc. ("Fortrea") by Laboratory Corporation of America Holdings ("Labcorp"), performance awards granted by Labcorp in 2021 for the 3-year performance period through December 31, 2023 (the "2021 PSA") were converted into time-vesting restricted stock units ("RSUs") of Labcorp pursuant to the terms of the Employee Matters Agreement by and between Labcorp and Fortrea (the "EMA"). The 2021 PSA was converted into a number of time-vesting Labcorp RSUs based on the degree of achievement of the performance criteria subject to the 2021 PSA prior to the Spin-Off and the adjustment ratio that applies to Labcorp equity awards in the Spin-Off, with vesting on the 30th day following Labcorp's filing of an annual report on Form 10-K that includes audited financial statements with respect to the 3-year period ending December 31, 2023. Amounts are estimates pending finalization of the adjustment ratio pursuant to the EMA. ( 3 )This number reflects the aggregate number of Restricted Stock Units held by the reporting person.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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