IDEXX director plans $1.17M stock sale under Rule 144

IDEXX director Lawrence D. Kingsley filed a Rule 144 notice to sell 2,203 common shares acquired via stock option exercise.

Rhea-AI Filing Summary

IDEXX LABORATORIES, INC. (IDXX) received a Rule 144 notice from director Lawrence D. Kingsley covering a proposed sale of company common stock. The notice lists 2,203 shares to be sold through Morgan Stanley Smith Barney LLC, with an aggregate market value of $1,172,178.19 and 78,781,116 shares of this class outstanding.

The shares to be sold were acquired from the issuer through a stock option exercise, with acquisition and payment by cash both dated September 4, 2026. The planned sale date is also listed as September 4, 2026, and the common stock is identified as trading on NASDAQ.

Key Figures

Shares proposed to be sold: 2,203 shares Aggregate market value: $1,172,178.19 Shares outstanding: 78,781,116 shares +2 more

5 metrics

Shares proposed to be sold 2,203 shares Common stock covered by the Rule 144 notice

Aggregate market value $1,172,178.19 Market value of the 2,203 shares proposed to be sold

Shares outstanding 78,781,116 shares Outstanding shares of the class of IDEXX common stock listed in the notice

Planned sale date September 4, 2026 Date listed for the proposed sale of shares

Acquisition date September 4, 2026 Date shares were acquired via stock option exercise

Key Terms

Rule 144, stock option exercise, aggregate market value

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

stock option exercise financial

"Common | 09/04/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 2203 | 1172178.19"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

What does the Form 144 filing disclose for IDEXX LABORATORIES, INC. (IDXX)?

It discloses that director Lawrence D. Kingsley filed a Rule 144 notice for a proposed sale of 2,203 shares of IDEXX common stock through Morgan Stanley Smith Barney LLC.

How many IDEXX (IDXX) shares are covered and what is the market value?

The notice covers 2,203 shares of IDEXX common stock with an aggregate market value of $1,172,178.19 as stated in the filing.

How were the IDEXX (IDXX) shares to be sold under Rule 144 acquired?

The shares were acquired from IDEXX through a stock option exercise, with the acquisition date listed as September 4, 2026 and payment made in cash.

When is the proposed sale date for the IDEXX (IDXX) shares in this Form 144?

The proposed sale date listed is September 4, 2026, the same date given for the stock option exercise and the cash payment.

How many IDEXX (IDXX) common shares are outstanding according to this filing?

The filing states that there are 78,781,116 shares of the relevant class of IDEXX common stock outstanding.

On which market is the IDEXX (IDXX) stock identified as trading in the filing?

The IDEXX common stock referenced in the notice is identified as trading on NASDAQ.

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

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Available on EDGAR 09/04/2026 - 04:03 PM Accepted by SEC EDGAR 09/04/2026 - 04:03 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001301427
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	IDEXX LABORATORIES, INC.
SEC File Number	000-19271
Address of Issuer	One IDEXX Drive Westbrook MAINE 04092
Phone	207-556-0300
Name of Person for Whose Account the Securities are To Be Sold	LAWRENCE D KINGSLEY
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2203	1172178.19	78781116	09/04/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/04/2026	Stock Option Exercise	Issuer			2203	09/04/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Lawrence Douglas Kingsley
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)