QuidelOrtho CTO acquires 18,657 shares as grant vests

A further 18,657 restricted stock units are scheduled to vest on October 15, 2027.

Rhea-AI Filing Summary

QuidelOrtho Corp EVP of R&D & CTO Jonathan Philip Siegrist released 18,657 restricted stock units on October 15, 2026, acquiring 18,657 common shares. QuidelOrtho withheld 6,695 shares at $13.91 per share to satisfy tax withholding obligations related to the issuance. A further 18,657 restricted stock units are scheduled to vest on October 15, 2027.

Insider Trade Summary

18,657 shares exercised/converted

Exercise 3 txns

Insider Siegrist Jonathan Philip

Role EVP of R&D & CTO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F3, F4	18,657	$0.00	$0.00
Exercise	Common Stock F1	18,657	$0.00	$0.00
Tax Withholding	Common Stock F2	6,695	$13.91	$93K

Holdings After Transaction: Restricted Stock Units — 18,657 contracts (Direct); Common Stock — 25,381 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. 18,656 shares vested on October 15, 2025; 18,657 shares vested on October 15, 2026; and the remaining 18,657 shares will vest on October 15, 2027.

Key Figures

Restricted stock units released: 18,657 restricted stock units Common shares acquired: 18,657 shares Shares withheld for tax withholding obligations: 6,695 shares +3 more

6 metrics

Restricted stock units released 18,657 restricted stock units October 15, 2026

Common shares acquired 18,657 shares October 15, 2026

Shares withheld for tax withholding obligations 6,695 shares October 15, 2026

Withholding price $13.91 per share Shares withheld on October 15, 2026

Shares vested 18,656 shares October 15, 2025

Remaining shares scheduled to vest 18,657 shares October 15, 2027

Key Terms

Restricted Stock Units, tax withholding obligations, vested

3 terms

Restricted Stock Units financial

"release of 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

"to satisfy tax withholding obligations"

vested financial

"18,656 shares vested on October 15, 2025"

FAQ

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

How many QDEL shares did Jonathan Philip Siegrist acquire, and how many were withheld?

Jonathan Philip Siegrist acquired 18,657 common shares on October 15, 2026, and 6,695 shares were withheld at $13.91 per share to satisfy tax withholding obligations related to the issuance.

What is the vesting schedule for Jonathan Philip Siegrist's QDEL restricted stock units?

18,656 shares vested on October 15, 2025, and 18,657 shares vested on October 15, 2026. The remaining 18,657 shares will vest on October 15, 2027.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/19/2026 - 05:08 PM EDT Accepted by SEC EDGAR 10/19/2026 - 05:07 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^*

Siegrist Jonathan Philip

(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)
	EVP of R&D & CTO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/15/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/15/2026		M		18,657(1)	A	$0	32,076	D
Common Stock	10/15/2026		F		6,695(2)	D	$13.91	25,381	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)	10/15/2026		M			18,657	(4)	(4)	Common Stock	18,657	$0	18,657	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. 18,656 shares vested on October 15, 2025; 18,657 shares vested on October 15, 2026; and the remaining 18,657 shares will vest on October 15, 2027.

Remarks:

	/s/ Euna Greene, attorney-in-fact for Jonathan P. Siegrist	10/19/2026
	** 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)