Exhibit 99.1

IDEXX Laboratories Announces First Quarter Results

WESTBROOK, Maine, May 1, 2025— IDEXX Laboratories, Inc. (NASDAQ: IDXX), a global leader in pet healthcare innovation, today announced first quarter results.

“IDEXX drove solid execution in the first quarter while advancing key enablers of our innovation-driven growth strategy. At the end of March, IDEXX launched a first-of-its-kind innovation, IDEXX Cancer Dx™, in our North American reference laboratories,” said Jay Mazelsky, President and Chief Executive Officer. “Customers have been asking for a way to diagnose cancer earlier because cancer is a leading cause of mortality in dogs and earlier detection provides better treatment options. This diagnostic panel for early detection of canine lymphoma brings exceptional levels of performance, turnaround time, and it is priced to allow veterinarian partners to include it in commonly used screening and sick patient testing panels.”

IDEXX Announces First Quarter Results

May 1, 2025

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First Quarter Results

The Company reports revenues of $998 million for the first quarter of 2025, an increase of 4% as reported and 5% organic, driven by Companion Animal Group ("CAG") growth of 3% as reported and 4% organic, and Water revenue growth of 5% as reported and 7% organic. CAG Diagnostics recurring revenue growth of 3% as reported and 4.5% organic was supported by double-digit IDEXX VetLab consumables organic revenue growth and benefits from IDEXX execution drivers, including 9% growth in IDEXX's global premium instrument installed base. IDEXX veterinary software, services and diagnostic imaging systems revenue increased 9% as reported and 7% organic.

First quarter earnings per diluted share (“EPS”) were $2.96, an increase of 5% as reported and 7% on a comparable basis, excluding a $0.08 per share benefit from a discrete litigation expense accrual adjustment.

First Quarter Performance Highlights

Companion Animal Group

The Companion Animal Group generated revenue growth of 3% as reported and 4% organic for the quarter. Solid growth was supported by CAG Diagnostics recurring revenue growth of 3% as reported and 4.5% organic. CAG Diagnostics recurring revenue growth was supported by 5% reported and 8.5% organic gains in International regions. U.S. CAG Diagnostics recurring revenue growth of 3% as reported and organic continued to outpace sector growth levels in the first quarter.

Additional U.S. companion animal practice key metrics are available in the Q1 2025 Earnings Snapshot accessible on the IDEXX website, www.idexx.com/investors.

Sustained high levels of customer retention, net price gains, and benefits from net new customers, and an increase in diagnostic utilization supported expansion of CAG Diagnostics recurring revenues.

IDEXX Announces First Quarter Results

May 1, 2025

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Veterinary software, services and diagnostic imaging systems revenues grew 9% as reported and 7% organic, reflecting 10% as reported and 9% organic recurring revenue growth led by continued momentum in cloud-based software placements.

Water

Water revenues grew 5% as reported and 7% organic for the quarter, reflecting solid organic growth across regions.

Livestock, Poultry and Dairy (“LPD”)

LPD revenues increased 1% as reported and 4% organic for the quarter, led by revenue gains in U.S. and Latin America.

Gross Profit and Operating Profit

Gross profits increased 5% as reported and 6% on a comparable basis. Gross margin of 62.4% increased 90 basis points as reported and 80 basis points on a comparable basis, supported by benefits from strong growth in IDEXX VetLab consumables revenue, improved instrument placement mix, and overall business mix.

Operating margin was 31.7% for the quarter, higher than the prior year by 70 basis points as reported but lower by 10 basis points on a comparable basis, net of ~90 basis points benefit from the adjustment to the discrete litigation expense accrual. Operating margin results reflect 4% operating expense growth as reported and 8% on a comparable basis, net of 3% favorable impact from the adjustment to the discrete litigation expense accrual. Comparable operating expense growth was driven by higher R&D spend related to advancing the Company's growth and innovation agenda and higher sales and marketing expense aligned with commercial activities in support of new product launches and sector development.

2025 Growth and Financial Performance Outlook

The Company is updating its full year revenue growth guidance range to $4,095 million - $4,210 million, or reported growth of 5% - 8%, an increase of $40 million at midpoint. This reflects a positive adjustment of ~1% at midpoint to full year estimates for reported revenue growth, reflecting recent weakening of the U.S. dollar aligned with the foreign currency exchange rate assumptions set forth in this release. The Company is maintaining a consistent outlook for organic revenue growth projected at 6% - 9%.

IDEXX Announces First Quarter Results

May 1, 2025

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The Company updated its full year reported operating margin outlook of 31.1% - 31.6%, including ~180 basis points of impact from the discrete litigation expense accrual adjustment and updated estimates for tariffs. Projected full year comparable operating profit margin expansion is maintained at 30 - 80 basis points. While uncertainty remains on trade policies, estimates include tariffs on internationally sourced materials, based on current U.S. pronouncements, and estimates for China's retaliatory tariffs.

The Company updated its EPS outlook range to $11.93 - $12.43, incorporating a $0.19 increase, reflecting $0.11 in favorable adjustments to foreign exchange estimates and $0.08 benefit from the discrete litigation expense accrual adjustment. The updated EPS growth outlook is 12% - 17% as reported, including a ~1% growth benefit from the discrete litigation expense accrual adjustment, while maintaining consistent 8% - 12% growth on a comparable basis.

The following table provides the Company's updated outlook for annual key financial metrics in 2025 with a comparison to the prior outlook:

Amounts in millions except per share data and percentages

IDEXX Announces First Quarter Results

May 1, 2025

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The following table outlines estimates of foreign currency exchange rate impacts, net of foreign currency hedging transactions, and foreign currency exchange rate assumptions reflected in the above financial performance outlook for 2025.

Conference Call and Webcast Information

IDEXX Laboratories, Inc. will be hosting a conference call today at 8:30 a.m. (EDT) to discuss its first quarter 2025 results and management’s outlook. Individuals can access a live webcast of the conference call through a link on the IDEXX website, www.idexx.com/investors. An archived edition of the webcast will be available after 1:00 p.m. (EDT) on that day via the same link and will remain available for one year. The live call also will be accessible by telephone. To listen to the live conference call, please dial 1-800-289-0462 or 1-323-794-2442 and reference passcode 949516.

2025 Annual Meeting of Shareholders

IDEXX Laboratories, Inc. will hold its 2025 Annual Meeting of Shareholders (the “2025 Annual Meeting”) on Wednesday, May 7, 2025 at 10:00 a.m. (EDT). The 2025 Annual Meeting will be a virtual meeting via a live audio webcast at www.virtualshareholdermeeting.com/IDXX2025. The online pre-meeting forum can be accessed before the 2025 Annual Meeting at www.proxyvote.com. At this online pre-meeting forum, you can submit questions in writing in advance of the 2025 Annual Meeting, vote, view the Rules of Conduct and Procedures relating to the 2025 Annual Meeting and access copies of the Company's proxy materials and annual report.

IDEXX Announces First Quarter Results

May 1, 2025

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Shareholders as of the close of business on March 10, 2025 are entitled to attend the 2025 Annual Meeting, vote their shares electronically and submit questions before and during the live audio webcast. As part of the 2025 Annual Meeting, the Company will answer the questions submitted by our shareholders during a live Q&A session, as time permits. The Company will publish the answer to each question, including those which we are unable to address during the meeting due to time constraints during the 2025 Annual Meeting, on the Company’s Investor Relations website as soon as practicable after the meeting. An archived replay will also be available at www.virtualshareholdermeeting.com/IDXX2025 after the conclusion of the 2025 Annual Meeting. Further information on the 2025 Annual Meeting can be found in the Company’s proxy materials.

About IDEXX Laboratories, Inc.

IDEXX is a global leader in pet healthcare innovation. Our diagnostic and software products and services create clarity in the complex, constantly evolving world of veterinary medicine. We support longer, fuller lives for pets by delivering insights and solutions that help the veterinary community around the world make confident decisions—to advance medical care, improve efficiency, and build thriving practices. Our innovations also help ensure the safety of milk and water across the world and maintain the health and well-being of people and livestock. IDEXX Laboratories, Inc. is a member of the S&P 500^® Index. Headquartered in Maine, IDEXX employs approximately 11,000 people and offers solutions and products to customers in more than 175 countries and territories. For more information about IDEXX, visit www.idexx.com.

IDEXX Announces First Quarter Results

May 1, 2025

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Note Regarding Forward-Looking Statements

This earnings release and the statements to be made in the accompanying earnings conference call contain forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995, including statements about the Company’s business prospects and estimates of the Company’s financial results for future periods. Forward-looking statements are included above under "2025 Growth and Financial Performance Outlook" and elsewhere and can be identified by the use of words such as "expects", "may", "anticipates", "intends", "would", "will", "plans", "believes", "estimates", "projected", "should", and similar words and expressions. Our forward-looking statements include statements relating to our expectations regarding financial performance; revenue growth and EPS outlooks; operating and free cash flow forecast; projected impact of foreign currency exchange rates and interest rates; projected operating margins and expenses and capital expenditures; projected tax, tax rate and EPS benefits from share-based compensation arrangements; projected effective tax rates, reduction of average shares outstanding and net interest expense; projected impact of tariffs (including U.S. tariffs and China's retaliatory tariffs); trends and other factors impacting the pet healthcare industry; net price realization improvement; IDEXX inVue Dx^TM analyzer placements; and future product launches and menu expansions. These statements are intended to provide management's expectation of future events as of the date of this earnings release; are based on management's estimates, projections, beliefs, and assumptions as of the date of this earnings release; and are not guarantees of future performance. These forward-looking statements involve known and unknown risks and uncertainties that may cause the Company's actual results, levels of activity, performance or achievements to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, among other things, the matters described under the headings "Business," "Risk Factors," "Legal Proceedings," "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Quantitative and Qualitative Disclosures About Market Risk" in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and in the corresponding sections of the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, as well as those described from time to time in the Company’s other filings with the U.S. Securities and Exchange Commission available at www.sec.gov. The Company specifically disclaims any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise.

Statement Regarding Non-GAAP Financial Measures

The following defines terms and conventions and provides reconciliations regarding certain measures used in this earnings release and/or the accompanying earnings conference call that are not required by, or presented in accordance with, generally accepted accounting principles in the United States of America ("GAAP"), otherwise referred to as non-GAAP financial measures. To supplement the Company’s consolidated results presented in accordance with GAAP, the Company has disclosed non-GAAP financial measures that exclude or adjust certain items. Management believes these non-GAAP financial measures provide useful supplemental information for its and investors’ evaluation of the Company’s business performance and liquidity and are useful for period-over-period comparisons of the performance of the Company’s business and its liquidity and to the performance and liquidity of our peers. While management believes that these non-GAAP financial measures are useful in evaluating the Company’s business, this information should be considered as supplemental in nature and should not be considered in isolation or as a substitute for the related financial information prepared in accordance with GAAP. In addition, these non-GAAP financial measures may not be the same as similarly titled measures reported by other companies.

Constant currency - Constant currency references are non-GAAP financial measures which exclude the impact of changes in foreign currency exchange rates and are consistent with how management evaluates our performance and comparisons with prior and future periods. We estimated the net impacts of currency on our revenue, gross profit, operating profit, and EPS results by restating results to the average exchange rates or exchange rate assumptions for the comparative period, which includes adjusting for the estimated impacts of foreign currency hedging transactions and certain impacts on our effective tax rates. These estimated currency changes impacted first quarter 2025 results as follows: decreased gross profit growth by 1.2%, increased gross margin growth by 10 basis points, decreased operating expense growth by 1.0%, decreased operating profit growth by 1.4%, increased operating profit margin growth by an immaterial amount , and decreased EPS growth by 1.4%. Constant currency revenue growth represents the percentage change in revenue during the applicable period, as compared to the prior year period, excluding the impact of changes in foreign currency exchange rates. See the supplementary analysis of results below for revenue percentage change from currency for the three months ended March 31, 2025 and refer to the 2025 Growth and Financial Performance Outlook section of this earnings release for estimated foreign currency exchange rate impacts on 2025 projections and estimates.

Growth and organic revenue growth - All references to growth and organic growth refer to growth compared to the equivalent prior year period unless specifically noted. Organic revenue growth is a non-GAAP financial measure that represents the percent change in revenue, as compared to the same period for the prior year, net of the impact of changes in foreign currency exchange rates, certain business acquisitions, and divestitures. Management believes that reporting organic revenue growth provides useful information to investors by facilitating easier comparisons of our revenue performance with prior and future periods and to the performance of our peers. Organic revenue growth should be considered in addition to, and not as a replacement of or a superior measure to, revenue growth reported in accordance with GAAP. See the supplementary analysis of results below for a reconciliation of reported revenue growth to organic revenue growth for the three months ended March 31, 2025. Please refer to the constant currency note above for a summary of foreign currency exchange rate impacts. Please refer to the 2025 Growth and Financial Performance Outlook section of this earnings release for estimated full year 2025 organic revenue growth for the Company and CAG Diagnostics recurring revenue growth. The percentage change in revenue resulting from acquisitions represents revenues during the current year period, limited to the initial 12 months from the date of the acquisition, that are directly attributable to business acquisitions. Revenue from acquisitions is expected to benefit projected full year 2025 revenue growth by an immaterial amount and have no impact on CAG Diagnostics recurring revenue growth.

IDEXX Announces First Quarter Results

May 1, 2025

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Comparable growth metrics - Comparable gross profit growth, comparable gross margin gain (or growth), comparable operating expense growth, comparable operating profit growth and comparable operating margin gain (or growth) are non-GAAP financial measures and exclude the impact of changes in foreign currency exchange rates and non-recurring or unusual items (if any). Please refer to the constant currency note above for a summary of foreign currency exchange rate impacts. Management believes that reporting comparable gross profit growth, comparable gross margin gain (or growth), comparable operating expense growth, comparable operating profit growth and comparable operating margin gain (or growth) provides useful information to investors because it enables better period-over-period comparisons of the fundamental financial results by excluding items that vary independent of performance and provides greater transparency to investors regarding key metrics used by management. Comparable gross profit growth, comparable gross margin gain (or growth), comparable operating expense growth, comparable operating profit growth and comparable operating margin gain (or growth) should be considered in addition to, and not as replacements of or superior measures to, gross profit growth, gross margin gain, operating expense growth, operating profit growth and operating margin gain reported in accordance with GAAP.

The reconciliation of these non-GAAP financial measures is as follows:

Projected 2025 comparable operating margin expansion outlined in the 2025 Growth and Financial Performance Outlook section of this earnings release reflects adjustments to projected 2025 operating margin expansion for: (i) an immaterial impact from year-over-year foreign currency exchange rate changes at noted exchange rates; and (ii) positive impact of the approximately $9 million discrete litigate expense accrual adjustment in the first quarter of 2025; and (iii) adjustment to full year 2024 reported operating margin expansion for the negative impact of the $61.5 million discrete litigation expense accrual adjustment in the second quarter of 2024.

These impacts described above reconcile reported gross profit growth, gross margin gain, operating expense growth, operating profit growth and operating margin gain (including projected 2025 operating margin expansion) to comparable gross profit growth, comparable gross margin gain, comparable operating expense growth, comparable operating profit growth and comparable operating margin gain for the Company.

Comparable EPS growth - Comparable EPS growth is a non-GAAP financial measure that represents the percentage change in earnings per share (diluted) ("EPS") for a measurement period, as compared to the prior base period, net of the impact of changes in foreign currency exchange rates from the prior base period and excluding the tax benefits of share-based compensation activity under ASU 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, and non-recurring or unusual items (if any). Management believes comparable EPS growth is a more useful way to measure the Company’s business performance than EPS growth because it enables better period-over-period comparisons of the fundamental financial results by excluding items that vary independent of performance and provides greater transparency to investors regarding a key metric used by management. Comparable EPS growth should be considered in addition to, and not as a replacement of or a superior measure to, EPS growth reported in accordance with GAAP. Please refer to the constant currency note above for a summary of foreign currency exchange rate impacts.

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May 1, 2025

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The reconciliation of this non-GAAP financial measure is as follows:

Projected 2025 comparable EPS growth outlined in the 2025 Growth and Financial Performance Outlook section of this earnings release reflects adjustments to projected full year 2025 reported EPS for: (i) estimated positive share-based compensation activity of ~$0.10; and (ii) estimated negative year-over-year foreign currency exchange rate change impact of ~$0.10 at noted exchange rates; (iii) impact of the discrete litigation expense accrual adjustment of $0.08 in the first quarter of 2025; (iv) adjustment to full year 2024 reported EPS for a negative $0.56 impact from the discrete litigation expense accrual adjustment in the second quarter of 2024; and (v) positive impact of share-based compensation activity of ~$0.24.

These impacts and those described in the constant currency note above reconcile reported EPS growth (including projected 2025 reported EPS growth) to comparable EPS growth for the Company.

Segment Income from Operations - We report segment income from operations in our Segment Information table below. Segment income from operations is a non-GAAP financial measure that adjusts for the impact of foreign currency transaction gains and losses and should be considered in addition to, and not as a replacement for, income from operations. We exclude foreign currency transaction gains and losses for each reportable segment (CAG, Water, and LPD) from segment income from operations and report the full amount of foreign currency transaction gains and losses in our Other operating segment. We believe that reporting segment income from operations provides supplemental analysis to help investors further evaluate each reportable segment’s business performance by excluding foreign currency transaction gains and losses, which are centrally managed by our corporate treasury function and which we do not consider relevant for assessing the results of each reportable segment’s operations. In addition, we believe that reporting segment income from operations provides information to investors regarding key metrics that are used by management, including our chief operating decision-maker, in evaluating the performance of each reportable segment.

The reconciliation of this non-GAAP financial measure is as follows:

IDEXX Announces First Quarter Results

May 1, 2025

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Free cash flow - Free cash flow is a non-GAAP financial measure and means, with respect to a measurement period, the cash generated from operations during that period, reduced by the Company’s investments in property and equipment. Management believes free cash flow is a useful measure because it indicates the cash the operations of the business are generating after appropriate reinvestment for recurring investments in property and equipment that are required to operate the business. Free cash flow should be considered in addition to, and not as a replacement of or a superior measure to, net cash provided by operating activities. See the supplementary analysis of results below for our calculation of free cash flow for the three months ended March 31, 2025 and 2024. To estimate projected 2025 free cash flow, we have deducted projected purchases of property and equipment (also referred to as capital expenditures) of approximately $160 million. Free cash flow conversion, or the net income to free cash flow ratio, is a non-GAAP financial measure that is defined as free cash flow, with respect to a measurement period, divided by net income for the same period. To calculate trailing twelve-month net income to free cash flow ratio for the twelve months ended March 31, 2025, we have deducted purchases of property and equipment of approximately $121 million from net cash provided from operating activities of approximately $968 million, divided by net income of approximately $895 million.

Debt to Adjusted EBITDA (Leverage Ratios) - Adjusted EBITDA, gross debt, and net debt are non-GAAP financial measures. Adjusted EBITDA is a non-GAAP financial measure of earnings before interest, taxes, depreciation, amortization, non-recurring transaction expenses incurred in connection with acquisitions, share-based compensation expense, and certain other non-cash losses and charges. Management believes that reporting Adjusted EBITDA, gross debt, and net debt in the Debt to Adjusted EBITDA ratios provides supplemental analysis to help investors further evaluate the Company's business performance and available borrowing capacity under the Company's credit facility. Adjusted EBITDA, gross debt, and net debt should be considered in addition to, and not as replacements of or superior measures to, net income or total debt reported in accordance with GAAP. For further information on how Adjusted EBITDA and the Debt to Adjusted EBITDA Ratios are calculated, see the Company's Annual Report on Form 10-K for the year ended December 31, 2024 and Quarterly Report on Form 10-Q for the quarter ended March 31, 2025.

Notes and Definitions

Discrete litigation expense accrual - During the first quarter of 2025, the Company reduced its previously established $89.0 million accrual related to a now-concluded litigation matter by approximately $9 million, resulting in a total accrual for this now-concluded litigation matter of approximately $80 million as of March 31, 2025, which represented our best estimate of the amount of the loss.

Now-concluded litigation matter - The Company was a defendant in a litigation matter involving an alleged breach of contract for underpayment of royalty payments made from 2004 through 2017 under an expired patent license agreement, and the trial court ruled in favor of the plaintiff in 2020. Following appeals and in light of the appellate court's April 3, 2025 decision, on April 17, 2025, the Company paid the judgment of approximately $80 million, and the plaintiff executed a satisfaction and release of judgment, which was filed with the trial court, concluding this matter. For further information, see the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2025.

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IDEXX Laboratories, Inc. and Subsidiaries

Condensed Consolidated Statement of Operations

Amounts in thousands except per share data (Unaudited)      

IDEXX Laboratories, Inc. and Subsidiaries

Selected Operating Information (Unaudited)      

¹Amounts presented may not recalculate due to rounding.   

IDEXX Announces First Quarter Results

May 1, 2025

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IDEXX Laboratories, Inc. and Subsidiaries

Segment Information

Amounts in thousands (Unaudited)    

IDEXX Announces First Quarter Results

May 1, 2025

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IDEXX Laboratories, Inc. and Subsidiaries

Revenues and Revenue Growth Analysis by Product and Service Categories and by Domestic and International Markets

Amounts in thousands (Unaudited)

¹See Statements Regarding Non-GAAP Financial Measures, above. Amounts presented may not recalculate due to rounding.

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May 1, 2025

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IDEXX Laboratories, Inc. and Subsidiaries

Condensed Consolidated Balance Sheet

Amounts in thousands (Unaudited)

IDEXX Laboratories, Inc. and Subsidiaries

Selected Balance Sheet Information (Unaudited)

¹Days sales outstanding represents the average of the accounts receivable balances at the beginning and end of each quarter divided by revenue for that quarter, the result of which is then multiplied by 91.25 days.

²Inventory turns are calculated as the ratio of our inventory-related cost of revenue for the quarter multiplied by four, divided by the average inventory balances at the beginning and end of each quarter.

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May 1, 2025

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IDEXX Laboratories, Inc. and Subsidiaries

Condensed Consolidated Statement of Cash Flows

Amounts in thousands (Unaudited)

IDEXX Laboratories, Inc. and Subsidiaries

Free Cash Flow

Amounts in thousands (Unaudited)

¹See Statements Regarding Non-GAAP Financial Measures, above.

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May 1, 2025

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IDEXX Laboratories, Inc. and Subsidiaries

Common Stock Repurchases

Amounts in thousands except per share data (Unaudited)