Sharon E. Underberg - 12 Feb 2026 Form 4 Insider Report for IDEXX LABORATORIES INC /DE (IDXX)

Role: EVP, GC & Corporate Secretary
Signature: /s/ Lily J. Lu, Attorney-in-Fact for Sharon E. Underberg
Issuer symbol: IDXX
Transactions as of: 12 Feb 2026
Net transactions value: -$157,967
Form type: 4
Filing time: 17 Feb 2026, 19:31:16 UTC
Previous filing: 12 Aug 2025
Next filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Underberg Sharon E.	EVP, GC & Corporate Secretary	ONE IDEXX DRIVE, WESTBROOK	/s/ Lily J. Lu, Attorney-in-Fact for Sharon E. Underberg	17 Feb 2026	0001630353

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IDXX	Common Stock	Options Exercise	$0	+173	+2.7%	$0.000000	6,533	14 Feb 2026	Direct	F1
transaction	IDXX	Common Stock	Options Exercise	$0	+176	+2.7%	$0.000000	6,709	14 Feb 2026	Direct
transaction	IDXX	Common Stock	Options Exercise	$0	+218	+3.2%	$0.000000	6,927	14 Feb 2026	Direct
transaction	IDXX	Common Stock	Options Exercise	$0	+265	+3.8%	$0.000000	7,192	14 Feb 2026	Direct
transaction	IDXX	Common Stock	Tax liability	$157,967	-251	-3.5%	$629.35	6,941	14 Feb 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	IDXX	Non-Qualified Stock Option (right-to-buy)	Award	$0	+3,738		$0.000000	3,738	12 Feb 2026	Common Stock	3,738	$617.20	Direct	F3
transaction	IDXX	Incentive Stock Option (right-to-buy)	Award	$0	+162		$0.000000	162	12 Feb 2026	Common Stock	162	$617.20	Direct	F4
transaction	IDXX	Restricted Stock Unit	Award	$0	+891		$0.000000	891	12 Feb 2026	Common Stock	891		Direct	F5
transaction	IDXX	Restricted Stock Unit	Options Exercise	$0	-173	-100%	$0.000000	0	14 Feb 2026	Common Stock	173		Direct	F6
transaction	IDXX	Restricted Stock Unit	Options Exercise	$0	-176	-50%	$0.000000	176	14 Feb 2026	Common Stock	176		Direct	F7
transaction	IDXX	Restricted Stock Unit	Options Exercise	$0	-218	-33%	$0.000000	434	14 Feb 2026	Common Stock	218		Direct	F8
transaction	IDXX	Restricted Stock Unit	Options Exercise	$0	-265	-25%	$0.000000	795	14 Feb 2026	Common Stock	265		Direct	F9

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes a total of 21 shares purchased under the Issuer Employee Stock Purchase Plan ('ESPP') on September 30, 2025 and December 31, 2025. There are a total of 333.654 shares held in the ESPP which has been increased by 0.001 shares due to a rounding calculation of previously issued fractional shares.
F2	Closing price of Issuer common stock on Nasdaq Global Select Market on February 13, 2026.
F3	Grant of option to buy shares of Issuer common stock that becomes exercisable in four annual installments beginning February 14, 2027.
F4	Grant of option to buy shares of Issuer common stock that becomes exercisable in one installment on February 14, 2030.
F5	Each restricted stock unit ('RSU') represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2027.
F6	Each RSU represents a contingent right to receive one share of Issuer common stock that vested in four annual installments, beginning February 14, 2023.
F7	Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2024.
F8	Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments beginning on February 14, 2025.
F9	Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2026.