[Form 4] Idexx Laboratories Inc Insider Trading Activity

Rhea-AI Filing Summary

Idexx Laboratories insider Form 4: Jonathan Jay Mazelsky, identified as President and CEO and a director, reported a disposal of 1,051 shares of Idexx common stock on 08/15/2025. The form shows 1,051 shares disposed and 82,443.3016 shares beneficially owned following the transaction. The filing was signed by Lily J. Lu as Attorney-in-Fact on 09/04/2025.

Positive

• Disclosure completed: The reporting person filed a Form 4 documenting the transaction, meeting Section 16 reporting requirements
• Substantial retained ownership: Reporting person retains 82,443.3016 shares following the reported disposition

Negative

• Disposition reported: A sale/disposition of 1,051 shares occurred on 08/15/2025
• Price field shows $0: The filing lists a price of $0 for the non-derivative disposition without further explanation

Insights

Financial Analyst

TL;DR: Insider sale of 1,051 shares reported; remaining beneficial ownership remains sizable at 82,443.3016 shares.

The Form 4 documents a single non-derivative disposition by Jonathan Jay Mazelsky on 08/15/2025 of 1,051 shares of IDEXX common stock. The filing lists the transaction code as "G" and reports 82,443.3016 shares beneficially owned after the sale. This is a routine Section 16 disclosure reflecting an insider sale; no derivative transactions or prices beyond a reported $0 are provided in the filing. The explicit figures allow verification of ownership changes but do not include proceeds or the reason for the sale.

Corporate Governance Expert

TL;DR: Director and CEO reported a small share disposition; disclosure complies with Section 16 reporting requirements.

The filing identifies Mazelsky as both an officer and director and records a reported disposal of 1,051 shares on 08/15/2025, with beneficial ownership remaining at 82,443.3016 shares. The document is signed by an Attorney-in-Fact and contains no amendments or additional remarks. From a governance and compliance perspective, the Form 4 fulfills the statutory reporting obligation but contains limited context about the transaction type or price beyond the table entry showing $0, which is presented without explanation in the filing.

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^*

MAZELSKY JONATHAN JAY

(Last) (First) (Middle)

ONE IDEXX DRIVE

(Street)

WESTBROOK ME 04092

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
IDEXX LABORATORIES INC /DE [ IDXX ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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

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

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

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	08/15/2025		G		1,051	D	$0	82,443.3016	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

Explanation of Responses:

Remarks:

	/s/ Lily J. Lu, Attorney-in-Fact for Jonathan Jay Mazelsky	09/04/2025
	** 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.

FAQ

What transaction did Jonathan Jay Mazelsky report on Form 4 for IDXX?

The Form 4 reports a non-derivative disposition of 1,051 shares of IDEXX common stock dated 08/15/2025.

How many IDEXX shares does the reporting person own after the reported transaction?

The filing shows the reporting person beneficially owns 82,443.3016 shares following the reported transaction.

When was the Form 4 signed and who signed it?

The Form 4 was signed by Lily J. Lu, Attorney-in-Fact for Jonathan Jay Mazelsky on 09/04/2025.

Does the Form 4 show exercise of options or derivative transactions for IDXX?

No. Table II (derivative securities) contains no entries; the reported transaction is a non-derivative disposition.

Is the transaction coded and dated in the filing?

Yes. The transaction date is 08/15/2025 and the table lists transaction code G for the non-derivative disposal.