What was the purpose of the 251-share disposition reported for IDEXX (IDXX)?

The disposition of 251 shares was for tax withholding. Shares were delivered at a price of $629.35 per share, corresponding to the issuer’s closing stock price on February 13, 2026, to satisfy tax liabilities tied to the RSU vesting event.

IDEXX executive receives options and RSU vesting

IDEXX Laboratories executive Sharon E. Underberg reported multiple equity award activities.

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Rhea-AI Filing Summary

IDEXX Laboratories executive Sharon E. Underberg reported multiple equity award activities. On February 12, 2026, she received grants of 3,738 non-qualified stock options, 162 incentive stock options, and 891 restricted stock units (RSUs), with the options and RSUs vesting in scheduled installments beginning February 14, 2027 and one option grant vesting on February 14, 2030.

On February 14, 2026, several prior RSU awards vested, converting into a total of 832 shares of common stock. To cover tax obligations, 251 shares of common stock were withheld at a price of $629.35 per share. After these transactions, she directly owned 6,940.654 shares of IDEXX common stock.

Insider Trade Summary

832 shares exercised/converted

Exercise 12 txns

Insider Underberg Sharon E.

Role EVP, GC & Corporate Secretary

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	173	$0.00	$0.00
Exercise	Restricted Stock Unit	176	$0.00	$0.00
Exercise	Restricted Stock Unit	218	$0.00	$0.00
Exercise	Restricted Stock Unit	265	$0.00	$0.00
Exercise	Common Stock	173	$0.00	$0.00
Exercise	Common Stock	176	$0.00	$0.00
Exercise	Common Stock	218	$0.00	$0.00
Exercise	Common Stock	265	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	251	$629.35	$158K
Grant/Award	Non-Qualified Stock Option (right-to-buy)	3,738	$0.00	$0.00
Grant/Award	Incentive Stock Option (right-to-buy)	162	$0.00	$0.00
Grant/Award	Restricted Stock Unit	891	$0.00	$0.00

Holdings After Transaction: Non-Qualified Stock Option (right-to-buy) — 3,738 contracts (Direct); Incentive Stock Option (right-to-buy) — 162 contracts (Direct); Restricted Stock Unit — 2,296 contracts (Direct); Common Stock — 6,940.654 shares (Direct)

Footnotes (9)

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.

FAQ

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

What insider transactions did IDEXX (IDXX) executive Sharon E. Underberg report in this Form 4?

Sharon E. Underberg reported equity grants, RSU vesting, and tax-withholding share dispositions. She received new stock options and RSUs, had earlier RSU awards convert into common shares, and surrendered some shares to satisfy tax obligations, all as part of her compensation.

How many stock options and RSUs were granted to Sharon E. Underberg of IDEXX (IDXX)?

She was granted 3,738 non-qualified stock options, 162 incentive stock options, and 891 restricted stock units. The options and RSUs vest over several years in scheduled installments, beginning February 14, 2027, with one option grant vesting fully on February 14, 2030.

How many IDEXX (IDXX) RSUs vested and converted into common stock in this filing?

RSU vesting converted a total of 832 shares of IDEXX common stock. These shares came from multiple RSU awards that vest in four annual installments, with schedules beginning between February 14, 2023 and February 14, 2026, as described in the accompanying footnotes.

How many IDEXX (IDXX) shares does Sharon E. Underberg own after these transactions?

After the reported transactions, Sharon E. Underberg directly owned 6,940.654 shares of IDEXX common stock. This figure reflects RSU conversions into common shares and the 251-share tax-withholding disposition recorded in the Form 4 filing.

How do the new IDEXX (IDXX) stock option grants to Sharon E. Underberg vest over time?

One option grant becomes exercisable in four annual installments beginning February 14, 2027. Another option grant becomes exercisable in a single installment on February 14, 2030, creating a long-term incentive structure tied to future service and performance.

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Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/17/2026 - 07:31 PM EST

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^*

Underberg Sharon E.

(Last)

(First)

(Middle)

ONE IDEXX DRIVE

(Street)

WESTBROOK

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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	EVP, GC & Corporate Secretary

3. Date of Earliest Transaction (Month/Day/Year)
02/12/2026

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)
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	02/14/2026		M		173	A	$0	6,532.654⁽¹⁾	D
Common Stock	02/14/2026		M		176	A	$0	6,708.654	D
Common Stock	02/14/2026		M		218	A	$0	6,926.654	D
Common Stock	02/14/2026		M		265	A	$0	7,191.654	D
Common Stock	02/14/2026		F		251	D	$629.35⁽²⁾	6,940.654	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)
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)
Non-Qualified Stock Option (right-to-buy)	$617.2	02/12/2026		A		3,738		⁽³⁾	02/11/2036	Common Stock	3,738	$0	3,738	D
Incentive Stock Option (right-to-buy)	$617.2	02/12/2026		A		162		⁽⁴⁾	02/11/2036	Common Stock	162	$0	162	D
Restricted Stock Unit	⁽⁵⁾	02/12/2026		A		891		⁽⁵⁾	⁽⁵⁾	Common Stock	891	$0	891	D
Restricted Stock Unit	⁽⁶⁾	02/14/2026		M			173	⁽⁶⁾	⁽⁶⁾	Common Stock	173	$0	0	D
Restricted Stock Unit	⁽⁷⁾	02/14/2026		M			176	⁽⁷⁾	⁽⁷⁾	Common Stock	176	$0	176	D
Restricted Stock Unit	⁽⁸⁾	02/14/2026		M			218	⁽⁸⁾	⁽⁸⁾	Common Stock	218	$0	434	D
Restricted Stock Unit	⁽⁹⁾	02/14/2026		M			265	⁽⁹⁾	⁽⁹⁾	Common Stock	265	$0	795	D

Explanation of Responses:

1. 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.

2. Closing price of Issuer common stock on Nasdaq Global Select Market on February 13, 2026.

3. Grant of option to buy shares of Issuer common stock that becomes exercisable in four annual installments beginning February 14, 2027.

4. Grant of option to buy shares of Issuer common stock that becomes exercisable in one installment on February 14, 2030.

5. 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.

6. Each RSU represents a contingent right to receive one share of Issuer common stock that vested in four annual installments, beginning February 14, 2023.

7. Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2024.

8. 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.

9. Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2026.

Remarks:

	/s/ Lily J. Lu, Attorney-in-Fact for Sharon E. Underberg	02/17/2026
	** 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.

Source: View Original Filing on SEC EDGAR