Were any open-market share purchases or sales reported for QuidelOrtho (QDEL)?

No open-market buy or sell transactions were reported. The Form 4 shows a grant/award acquisition of 20,759 shares through RSU release and a disposition of 10,252 shares solely to cover tax withholding obligations, not a discretionary market sale.

QuidelOrtho (NASDAQ: QDEL) CEO RSU vesting triggers tax share withholding

Filing Impact

(High)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

QuidelOrtho Corp President and CEO Brian J. Blaser reported routine equity compensation activity. On May 15, 20,759 restricted stock units converted into an equal number of common shares, reflecting a scheduled vesting.

To cover tax obligations from this vesting, 10,252 common shares were withheld at $10.32 per share, a tax-withholding disposition rather than an open-market sale. Following these transactions, he holds 45,901 common shares directly and 40,073 common shares indirectly through a trust. Footnotes note that 20,759 shares vested on each of May 15, 2025 and May 15, 2026, with another 20,759 scheduled to vest on May 15, 2027.

Insider Trade Summary

20,759 shares exercised/converted

Mixed 4 txns

Insider Blaser Brian J.

Role President and CEO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	20,759	$0.00	--
Grant/Award	Common Stock	20,759	$0.00	--
Tax Withholding	Common Stock	10,252	$10.32	$106K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 20,759 shares (Direct, null); Common Stock — 45,901 shares (Direct, null); Common Stock — 40,073 shares (Indirect, By Trust)

Footnotes (1)

Reflects release of restricted stock units that were previously reported on a Form 3. 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. Each restricted stock unit represents the right to receive one share of QuidelOrtho Corporation common stock. 20,759 shares vested on each of May 15, 2025 and May 15, 2026; the remaining 20,759 shares will vest on May 15, 2027.

Key Figures

RSUs converted: 20,759 shares Tax-withheld shares: 10,252 shares Tax-withholding price: $10.32 per share +3 more

6 metrics

RSUs converted 20,759 shares Restricted stock units released into common stock on May 15

Tax-withheld shares 10,252 shares Shares withheld to satisfy tax obligations on vesting

Tax-withholding price $10.32 per share Price used for 10,252 withheld shares

Direct holdings after 45,901 shares Common stock directly owned after transactions

Indirect holdings after 40,073 shares Common stock held indirectly by trust

Annual vesting tranches 20,759 shares each Vesting on May 15, 2025, 2026, and 2027

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" with underlying common stock"

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" for the A code"

Exercise or conversion of derivative security financial

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

By Trust financial

"nature_of_ownership: "By Trust" describing indirect ownership of common stock"

Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 04:05 PM

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^*

Blaser Brian J.

(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)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/15/2026		A		20,759⁽¹⁾	A	$0	45,901	D
Common Stock	05/15/2026		F		10,252⁽²⁾	D	$10.32	35,649	D
Common Stock								40,073	I	By Trust

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽³⁾	05/15/2026		M			20,759	⁽⁴⁾	⁽⁴⁾	Common Stock	20,759	$0	20,759	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. 20,759 shares vested on each of May 15, 2025 and May 15, 2026; the remaining 20,759 shares will vest on May 15, 2027.

Remarks:

	/s/ Euna Greene, attorney-in-fact for Brian J. Blaser	05/19/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did QuidelOrtho (QDEL) CEO Brian Blaser report?

Brian Blaser reported RSU vesting and related tax withholding. On May 15, 20,759 restricted stock units converted into common shares, and 10,252 shares were withheld at $10.32 per share to satisfy tax obligations tied to this vesting.

How many QuidelOrtho (QDEL) shares does the CEO hold after these transactions?

After the reported transactions, Brian Blaser holds 45,901 shares directly. He also holds 40,073 common shares indirectly through a trust, according to the holding entry, providing a combined picture of his direct and indirect ownership positions.

What are the vesting terms for the CEO’s QuidelOrtho (QDEL) restricted stock units?

The RSUs vest in three equal annual installments of 20,759 shares. Footnotes state 20,759 shares vested on May 15, 2025 and May 15, 2026, with a remaining 20,759 scheduled to vest on May 15, 2027 under the same award.

Why were 10,252 QuidelOrtho (QDEL) shares disposed of in this Form 4?

The 10,252 shares were withheld to satisfy tax obligations. The filing explains that this disposition occurred in connection with the issuer’s withholding of common shares for tax withholding obligations related to the RSU release into common stock.

How do QuidelOrtho (QDEL) restricted stock units convert into common shares?

Each restricted stock unit converts into one share of common stock. The footnotes clarify that one restricted stock unit represents the right to receive one QuidelOrtho Corporation common share upon vesting and release, as reflected in the 20,759-unit conversion.