QuidelOrtho COO reports RSU vesting and tax withholding

QuidelOrtho Corp Chief Operations Officer Philip D. McLellan reported routine equity compensation activity involving restricted stock units and related tax withholding.

Rhea-AI Filing Summary

QuidelOrtho Corp Chief Operations Officer Philip D. McLellan reported routine equity compensation activity involving restricted stock units and related tax withholding. On April 26, 2026, 1,946 restricted stock units were released and converted into the same number of common shares at no cost, increasing his direct holdings.

To cover tax withholding obligations tied to this vesting, 699 common shares were withheld and disposed of at a value of $11.59 per share, a non‑market, tax-driven transaction. After these transactions, McLellan directly held 22,497 shares of QuidelOrtho common stock.

Insider Trade Summary

1,946 shares exercised/converted

Exercise 3 txns

Insider McLellan Philip D.

Role Chief Operations Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,946	$0.00	$0.00
Grant/Award	Common Stock	1,946	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	699	$11.59	$8K

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 22,497 shares (Direct)

Footnotes (4)

1. F1. Reflects release of restricted stock units that were previously reported on a Form 3.
2. F2. Disposition of shares, as set forth above, was in connection with the Issuer's withholding of common shares to satisfy tax withholding obligations related to the issuance of common shares upon release of restricted stock units.
3. F3. Each restricted stock unit represents the right to receive one share of QuidelOrtho Corporation common stock.
4. F4. 1,945 shares vested on April 26, 2025; the remaining 1,946 shares vested on April 26, 2026.

Key Figures

RSUs converted to common stock: 1,946 shares Shares withheld for taxes: 699 shares Tax withholding share value: $11.59 per share +2 more

5 metrics

RSUs converted to common stock 1,946 shares Restricted stock units released and converted on April 26, 2026

Shares withheld for taxes 699 shares Tax-withholding disposition of common stock on April 26, 2026

Tax withholding share value $11.59 per share Value assigned to 699 shares used to satisfy tax obligations

Shares held after transactions 23,196 shares Direct QuidelOrtho common stock holdings after April 26, 2026 activity

Exercised RSUs 1,946 units Restricted stock units exercised/converted in derivative transaction

Key Terms

Restricted Stock Units, tax withholding obligations, grant, award, or other acquisition, Exercise or conversion of derivative security, +1 more

5 terms

Restricted Stock Units financial

"security_title": "Restricted Stock Units""

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"withholding of common shares to satisfy tax withholding obligations related to the issuance"

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

Form 3 regulatory

"Reflects release of restricted stock units that were previously reported on a Form 3."

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

FAQ

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

What did QuidelOrtho (QDEL) COO Philip McLellan report in this Form 4?

Philip McLellan reported vesting of equity awards and related tax withholding. 1,946 restricted stock units converted into common shares, while 699 shares were withheld to satisfy tax obligations. These are routine compensation-related entries rather than open-market stock purchases or sales.

How many QuidelOrtho (QDEL) shares does Philip McLellan hold after this filing?

After the reported transactions, Philip McLellan directly holds 23,196 shares of QuidelOrtho common stock. This reflects the net result of 1,946 shares issued from restricted stock units and 699 shares disposed of to cover associated tax withholding obligations on April 26, 2026.

Were the QuidelOrtho (QDEL) transactions open-market buys or sells?

The transactions were not open-market trades. McLellan received 1,946 shares through the release of restricted stock units at no cost, and 699 shares were disposed of to satisfy tax withholding. These are compensation and tax-related entries, not discretionary market purchases or sales.

What does the tax-withholding disposition mean in Philip McLellan’s QuidelOrtho (QDEL) filing?

The tax-withholding disposition reflects QuidelOrtho retaining 699 common shares to cover McLellan’s tax obligations from RSU vesting. Instead of paying taxes in cash, a portion of newly released shares was withheld, a common administrative mechanism that does not represent an open-market stock sale.

What happened to Philip McLellan’s restricted stock units at QuidelOrtho (QDEL)?

1,946 restricted stock units vested and were converted into an equal number of common shares. A footnote states each RSU represents one share of common stock. Following this vesting and conversion, the derivative position tied to these specific units was reduced to zero in the filing.

Is this QuidelOrtho (QDEL) Form 4 filing a signal of insider bullishness or bearishness?

The filing mainly shows routine compensation vesting and tax withholding, not directional trading. McLellan received 1,946 shares from RSU vesting and had 699 shares withheld for taxes. These mechanics typically reflect standard equity compensation processes rather than a change in his market view.

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

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Accepted by SEC EDGAR 04/28/2026 - 04:10 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

McLellan Philip D.

(Last) (First) (Middle)

9975 SUMMERS RIDGE ROAD

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
QuidelOrtho Corp [ QDEL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operations Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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
Common Stock	04/26/2026		A		1,946(1)	A	$0	23,196	D
Common Stock	04/26/2026		F		699(2)	D	$11.59	22,497	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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 Units	(3)	04/26/2026		M			1,946	(4)	(4)	Common Stock	1,946	$0	0	D

Explanation of Responses:

1. Reflects release of restricted stock units that were previously reported on a Form 3.

2. Disposition of shares, as set forth above, was in connection with the Issuer's withholding of common shares to satisfy tax withholding obligations related to the issuance of common shares upon release of restricted stock units.

3. Each restricted stock unit represents the right to receive one share of QuidelOrtho Corporation common stock.

4. 1,945 shares vested on April 26, 2025; the remaining 1,946 shares vested on April 26, 2026.

Remarks:

	/s/ Euna Greene, attorney-in-fact for Philip D. McLellan	04/28/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)