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): June 16, 2026

QUIDELORTHO CORPORATION

(Exact name of Registrant as specified in its Charter)

Delaware 001-41409 87-4496285

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

9975 Summers Ridge Road, San Diego, California 92121

(Address of principal executive offices, including zip code)

(858) 552-1100

(Registrant’s telephone number, including area code)

N/A

(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 (see General Instruction A.2. below):

☐

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class

Trading
Symbol(s)

Name of each exchange
on which registered

Common Stock, $0.001 Par Value QDEL The Nasdaq Stock Market

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 5.07

Submission of Matters to a Vote of Security Holders.

On June 16, 2026, QuidelOrtho Corporation (the “Company”) held its 2026 Annual Meeting of Stockholders (the “Annual Meeting”). The following are the final voting results on proposals considered and voted upon at the Annual Meeting, all of which are described in the proxy statement for the Annual Meeting, as filed with the U.S. Securities and Exchange Commission on April 27, 2026.

Proposal No. 1

The Company’s stockholders elected the ten director nominees to the Company’s Board of Directors by the votes set forth in the table below:

Name Votes For Votes Withheld Broker Non-Votes

Brian J. Blaser

56,664,418 560,787 7,088,721

Kenneth F. Buechler, Ph.D.

56,008,344 1,216,861 7,088,721

John R. Chiminski

56,788,541 436,664 7,088,721

Evelyn S. Dilsaver

56,676,148 549,057 7,088,721

R. Scott Huennekens

56,634,433 590,772 7,088,721

Edward L. Michael

56,585,483 639,722 7,088,721

Mary Lake Polan, M.D., Ph.D., M.P.H.

56,148,684 1,076,521 7,088,721

Ann D. Rhoads

56,741,863 483,342 7,088,721

Kenneth J. Widder, M.D.

56,078,638 1,146,567 7,088,721

Joseph D. Wilkins Jr.

56,587,197 638,008 7,088,721

Proposal No. 2

The Company’s stockholders approved, on an advisory basis, the compensation of the Company’s named executive officers by the votes set forth in the table below:

Votes For Votes Against Abstentions Broker Non-Votes
55,716,067 1,486,910 22,228 7,088,721

Proposal No. 3

The Company’s stockholders ratified the appointment of KPMG LLP as the Company’s independent registered public accounting firm for the Company’s 2026 fiscal year by the votes set forth in the table below:

Votes For Votes Against Abstentions
64,197,113 97,367 19,446

SIGNATURES

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

Date: June 16, 2026

QUIDELORTHO CORPORATION
By:

/s/ Nathaniel B. Sisitsky

Name: Nathaniel B. Sisitsky
Its: Chief Legal Officer and Corporate Secretary