Bio-Rad director gains shares via RSU vesting

BIO-RAD LABORATORIES, INC. director Arnold A. Pinkston reported routine equity compensation activity.

Rhea-AI Filing Summary

BIO-RAD LABORATORIES, INC. director Arnold A. Pinkston reported routine equity compensation activity. He acquired 407 shares of Bio-Rad Class A common stock upon vesting of restricted stock units, bringing his direct common stock holdings to 715 shares after the transaction.

The filing also shows 407 restricted stock units were fully settled, reducing that RSU position to zero. In addition, he received a new grant of 369 restricted stock units, each representing one share of Class A common stock, which will vest 100% on the earlier of the first anniversary of the grant date or the company’s next annual meeting of stockholders.

Insider Trade Summary

407 shares exercised/converted

Exercise 3 txns

Insider PINKSTON ARNOLD A

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	369	$0.00	$0.00
Exercise	Restricted Stock Units	407	$0.00	$0.00
Exercise	Bio-Rad A Common Stock	407	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 369 contracts (Direct); Bio-Rad A Common Stock — 715 shares (Direct)

Footnotes (3)

1. F1. Shares of Class A common stock acquired on the vesting of restricted stock units.
2. F2. Each restricted stock unit represents a contingent right to receive one share of Bio-Rad Class A common stock.
3. F3. The restricted stock units will vest 100% on the earlier of the first anniversary of the grant date or the date of the company's next annual meeting of stockholders.

Key Figures

Shares acquired from RSU vesting: 407 shares Shares held after transaction: 715 shares New RSU grant: 369 units +2 more

5 metrics

Shares acquired from RSU vesting 407 shares Class A common stock acquired on RSU vesting

Shares held after transaction 715 shares Direct Class A common stock holdings after Form 4 transactions

New RSU grant 369 units Restricted stock units representing Class A common stock

RSU-to-share ratio 1:1 Each restricted stock unit equals one Class A share

Exercise/convert price $0.00 Reported price per share/unit on transactions

Key Terms

Restricted Stock Units, Class A common stock, vest, grant

4 terms

Restricted Stock Units financial

"The filing also shows 407 restricted stock units were fully settled"

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.

Class A common stock financial

"He acquired 407 shares of Bio-Rad Class A common stock"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

vest financial

"acquired on the vesting of restricted stock units"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

grant financial

"he received a new grant of 369 restricted stock units"

FAQ

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

What insider transactions did BIO (Bio-Rad Laboratories) director Arnold Pinkston report?

Arnold A. Pinkston reported routine equity compensation activity, acquiring 407 shares of Class A common stock upon RSU vesting and receiving a new grant of 369 restricted stock units. These transactions reflect compensation-related awards rather than open-market buying or selling.

How many Bio-Rad (BIO) shares does Arnold Pinkston hold after this Form 4?

Following the reported transactions, Arnold A. Pinkston directly holds 715 shares of Bio-Rad Class A common stock. This balance reflects 407 shares acquired upon restricted stock unit vesting, combined with his prior holdings, as disclosed in the Form 4 filing.

What happened to Arnold Pinkston’s previously held restricted stock units at Bio-Rad (BIO)?

Previously held restricted stock units totaling 407 units were settled into 407 shares of Bio-Rad Class A common stock, reducing that specific RSU position to zero. Each unit converted on a one-for-one basis into common shares, as described in the filing footnotes.

What are the terms of Arnold Pinkston’s new restricted stock unit grant at BIO?

Arnold A. Pinkston received a grant of 369 restricted stock units, each representing one share of Bio-Rad Class A common stock. These units will vest 100% on the earlier of the first anniversary of the grant date or the company’s next annual meeting of stockholders.

Does Arnold Pinkston’s Form 4 for BIO involve any open-market stock sales or purchases?

The Form 4 does not show any open-market purchases or sales. It reports an RSU vesting that delivered 407 shares of Class A common stock and a new grant of 369 restricted stock units, both characterized as compensation-related equity transactions.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 04/23/2026 - 03:23 PM 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^*

PINKSTON ARNOLD A

(Last) (First) (Middle)

C/O BIO-RAD LABORATORIES, INC.

1000 ALFRED NOBEL DRIVE

(Street)

HERCULES CALIFORNIA 94547

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
BIO-RAD LABORATORIES, INC. [ BIO BIO.B ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/21/2026

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
Bio-Rad A Common Stock	04/21/2026		M		407(1)	A	$0	715	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	$0(2)	04/21/2026		A		369		(3)	(3)	Bio-Rad A Common Stock	369	$0	369	D
Restricted Stock Units	$0(2)	04/21/2026		M			407	(3)	(3)	Bio-Rad A Common Stock	407	$0	0	D

Explanation of Responses:

1. Shares of Class A common stock acquired on the vesting of restricted stock units.

2. Each restricted stock unit represents a contingent right to receive one share of Bio-Rad Class A common stock.

3. The restricted stock units will vest 100% on the earlier of the first anniversary of the grant date or the date of the company's next annual meeting of stockholders.

Remarks:

	/s/ Arnold A. Pinkston	04/23/2026
	** 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)