T. Rowe Price reports 8.3% stake in QuidelOrtho

T. Rowe Price Investment Management, Inc. filed an amended Schedule 13G disclosing beneficial ownership of 5,629,965 shares of QuidelOrtho Corp common stock, equal to 8.3% of the class.

Rhea-AI Filing Summary

T. Rowe Price Investment Management, Inc. filed an amended Schedule 13G disclosing beneficial ownership of 5,629,965 shares of QuidelOrtho Corp common stock, equal to 8.3% of the class. The filing lists 5,612,705 shares with sole voting power and 5,629,965 shares with sole dispositive power. The amendment is signed by a Vice President and dated 04/08/2026.

Insights

Institutional Ownership Analyst

Large passive holding disclosed: T. Rowe Price holds 8.3% of QuidelOrtho.

T. Rowe Price reports 5,629,965 shares beneficially owned with sole dispositive control, representing 8.3% of the class. Such Schedule 13G/A amendments typically update position counts and ownership percentages rather than signal trading intent.

Track subsequent amendments or Form 13D filings for changes in intent; investor filings and corporate disclosures will show material shifts in ownership or voting plans.

Key Figures

Beneficial ownership: 5,629,965 shares Percent of class: 8.3% Sole voting power: 5,612,705 shares +3 more

6 metrics

Beneficial ownership 5,629,965 shares Amount beneficially owned reported in Item 4

Percent of class 8.3% Percent of class reported in Item 4

Sole voting power 5,612,705 shares Sole power to vote reported in Item 4(i)

Sole dispositive power 5,629,965 shares Sole power to dispose reported in Item 4(iii)

Filing type Schedule 13G/A Form type provided in metadata

Signature date 04/08/2026 Signature date on the amendment

Key Terms

Schedule 13G/A, beneficial ownership, sole dispositive power, sole voting power

4 terms

Schedule 13G/A regulatory

"Amendment No. 5 ) QUIDELORTHO CORP COMMON STOCK"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficial ownership financial

"Amount beneficially owned: 5629965 (b) | Percent of class: 8.3 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

sole dispositive power legal

"Sole power to dispose or to direct the disposition of: 5629965"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

sole voting power legal

"Sole power to vote or to direct the vote: 5612705"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does T. Rowe Price report in QDEL?

T. Rowe Price reports beneficial ownership of 5,629,965 shares, equal to 8.3% of QuidelOrtho’s common stock. The filing lists sole voting power for 5,612,705 shares and sole dispositive power for 5,629,965 shares.

Is this a Schedule 13G or 13D filing for QDEL?

This is an amended Schedule 13G/A for QDEL, used by passive institutional investors to report holdings. It updates previously reported beneficial ownership and related voting/dispositive power details.

Does T. Rowe Price claim beneficial ownership in the filing for QDEL?

The filing lists the shares as beneficially owned but includes a statement denying beneficial ownership. The filer nevertheless reports voting and dispositive powers and the 5,629,965-share position.

When was the Schedule 13G/A signed for QuidelOrtho (QDEL)?

The Schedule 13G/A amendment is signed by Ellen York, Vice President, with a signature date of 04/08/2026. The cover shows an as-of reporting date of 03/31/2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/08/2026 - 03:26 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 5)

QUIDELORTHO CORP

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

219798105

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 219798105

1

Names of Reporting Persons

T. Rowe Price Investment Management, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MARYLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,612,705.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,629,965.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,629,965.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: QUIDELORTHO CORP
(b)	Address of issuer's principal executive offices: 9975 SUMMERS RIDGE ROAD, SAN DIEGO, CA, 92121
Item 2.
(a)	Name of person filing: T. Rowe Price Investment Management, Inc.
(b)	Address or principal business office or, if none, residence: 1307 Point Street, Baltimore, MD 21231
(c)	Citizenship: Maryland
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 5629965
(b)	Percent of class: 8.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5612705
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5629965
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. T. Rowe Price Investment Management, Inc. hereby declares and affirms that the filing of Schedule 13G shall not be construed as an admission that Price Investment Management is the beneficial owner of the securities referred to, which beneficial ownership is expressly denied.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

T. Rowe Price Investment Management, Inc.

Signature:	Ellen York
Name/Title:	Vice President
Date:	04/08/2026