Exhibit 99

PATTERSON COMPANIES REPORTS FISCAL 2020

FOURTH-QUARTER AND YEAR-END OPERATING RESULTS

St. Paul, Minn. — June 24, 2020 — Patterson Companies, Inc. (Nasdaq: PDCO) today reported operating results for its fiscal year 2020 and fourth quarter ended April 25, 2020.

“The strategies we executed during fiscal 2020 produced accelerating performance through the first 11 months, enabling us to exceed our goals for the year despite the impact of COVID-19, resulting in full fiscal 2020 adjusted earnings growth of 10.7 percent,” said Mark Walchirk, President and CEO of Patterson Companies. “Our strong business momentum from the first three quarters of fiscal 2020 continued to build during the first two months of our fiscal fourth quarter, helping to deliver fourth quarter adjusted earnings growth of 16.2 percent compared to the same period last year.

“Beginning in late-March, COVID-19 considerably disrupted our end markets, impacting our performance for the balance of the year and into the first quarter. Patterson took immediate actions in response to COVID-19 to protect employee health and safety, ensure business continuity for our customers and help to reduce the spread of the virus in our communities. We also acted quickly in response to this disruption by taking additional actions, including aggressive cost savings measures, suspending all non-essential capital expenditures and additional measures to preserve our liquidity.

“The challenges related to COVID-19 are continuing into fiscal 2021, but we are confident in the long-term fundamentals of our end markets and the essential role we serve with our customers. I am especially proud of the way our Patterson team has responded during this crisis, maintaining their focus on our customers and reinforcing our value proposition to the businesses we serve. Our successful efforts to strengthen Patterson throughout fiscal 2020, demonstrated by our accelerating performance and earnings growth, have positioned us well to navigate this near-term disruption and emerge as a stronger Patterson.”

Fourth-Quarter Fiscal 2020 Results

Patterson’s performance in the first two months of the fourth quarter was offset by disruption caused by COVID-19 across the Company’s end markets starting in late-March and April, considerably impacting overall fourth quarter results.

Consolidated net sales were approximately $1.29 billion (see attached Sales Summary for further details) in the fiscal fourth quarter ended April 25, 2020, a decrease of 10.5 percent compared to the same period last year. Internal sales, which are adjusted for the effects of currency translation and changes in product selling relationships, decreased 10.0 percent. Internal sales for the first two months of the fiscal fourth quarter, ended on March 21, around when COVID-19 began to impact performance, increased 5.1 percent compared to the same period last year.

Reported net loss attributable to Patterson Companies, Inc. for the fourth quarter of fiscal 2020 totaled $608.6 million, or $6.44 per diluted share, compared to net income attributable to Patterson Companies, Inc. of $28.0 million, or $0.30 per diluted share, in the fourth quarter of fiscal 2019. The year-over-year decrease in the period is primarily due to a pre-tax $675.1 million goodwill impairment charge related to our Animal Health segment.

Fourth-quarter adjusted net income¹ attributable to Patterson Companies, Inc., which excludes deal amortization, integration and business restructuring expenses, an investment loss and goodwill impairment, totaled $41.1 million for the fourth quarter of fiscal 2020, or $0.43 per diluted share, compared to $35.0 million in the same quarter of fiscal 2019, or $0.37 per diluted share. This represents a 16.2 percent improvement over the prior

year period. The year-over-year increase in the period is attributable to the strong sales momentum at the beginning of the fourth quarter and immediate expense reductions in response to COVID-19.

Patterson Dental

Reported net sales in our Dental segment for the fourth quarter of fiscal 2020, which represented approximately 32 percent of total company sales, were $409.6 million compared to $563.5 million in the fourth quarter of last year. Internal sales decreased 27.2 percent compared to the fiscal 2019 fourth quarter. Internal sales for the first two months of the fiscal fourth quarter, ended on March 21, increased 7.8 percent compared to the same period last year.

Patterson Animal Health

Reported net sales in our Animal Health segment for the fourth quarter of fiscal 2020, which comprised approximately 66 percent of the Company’s total sales, were $853.2 million compared to $866.4 million in the fourth quarter of last year. Internal sales decreased 0.8 percent compared to the fiscal 2019 fourth quarter. Internal sales for the first two months of the fiscal fourth quarter, ended on March 21, increased 3.7 percent compared to the same period last year.

Full-Year Fiscal 2020 Results

Patterson’s fiscal 2020 results reflect the sales, profitability and cash flow improvements the Company achieved throughout the first 11 months of its fiscal year, which enabled Patterson to deliver year-over-year adjusted earnings growth despite the end market disruption caused by COVID-19 starting in late-March and April.

Consolidated reported net sales for fiscal 2020 totaled $5.49 billion, a 1.5 percent year-over-year decrease. Internal sales decreased 0.9 percent compared to fiscal 2019. Internal sales for the first 11 months of the fiscal year, ended on March 21, increased 2.7 percent compared to the same period last year. Reported net loss attributable to Patterson Companies, Inc. was $588.4 million, or $6.25 per diluted share, compared to reported net income attributable to Patterson Companies, Inc. of $83.6 million, or $0.89 per diluted share in fiscal 2019. The year-over-year decline was primarily attributable to a pre-tax $675.1 million goodwill impairment charge related to our Animal Health segment.

Adjusted net income¹ attributable to Patterson Companies, Inc., which excludes deal amortization, integration and business restructuring expenses, certain legal expenses, accelerated debt-related costs, discrete tax matters, investment (gain) loss and goodwill impairment, totaled $147.6 million, or $1.55 per diluted share, compared to $130.9 million, or $1.40 per diluted share, in the year-ago period. This represents a 10.7 percent improvement over the prior year. The year-over-year increase is primarily attributable to improved performance in the Dental segment across consumables, equipment and value-added services.

Balance Sheet and Capital Allocation

During the full year of fiscal 2020 Patterson Companies used $243.5 million of cash from operating activities and collected deferred purchase price receivables of $540.9 million, netting $297.4 million in cash, compared to a total of $450.5 million during the full year of fiscal 2019. The previous year period contained a trade accounts receivable facility amount of $171.0 million and the current period contained a trade accounts receivable facility amount of $29.0 million. Free cash flow¹ (see definition below and attached free cash flow table) generated during fiscal 2020 is $7.8 million higher than the fiscal 2019 period primarily due to a decrease in working capital.

In the fourth quarter of fiscal 2020, Patterson Companies paid $24.9 million in cash dividends to shareholders. For the full fiscal year, Patterson has returned $100.4 million in cash dividends to shareholders.

Fiscal 2021 Guidance

Given the ongoing disruption of North American and international market conditions and the inability to accurately predict the economic effects of COVID-19 and related government actions, Patterson is not issuing fiscal 2021 earnings guidance at this time.

¹Non-GAAP Financial Measures

The Reconciliation of GAAP to non-GAAP Measures table appearing behind the accompanying financial information is provided to adjust reported GAAP measures, namely operating (loss) income, (loss) income before taxes, income tax (benefit) expense, net (loss) income attributable to Patterson Companies, Inc. and diluted (loss) earnings per share attributable to Patterson Companies, Inc., for the impact of deal amortization, integration and business restructuring expenses, certain legal expenses, accelerated debt-related costs, discrete tax matters, investment (gain) loss and goodwill impairment, along with the related tax effects of these items.

The term “free cash flow” used in this release is defined as net cash (used in) provided by operating activities less capital expenditures less the one-time benefit from the initiation of our trade account receivables facilities plus collection of deferred purchase price receivables.

In addition, the term “internal sales” used in this release represents net sales adjusted to exclude foreign currency impact and changes in product selling relationships. Foreign currency impact represents the difference in results that is attributable to fluctuations in currency exchange rates the company uses to convert results for all foreign entities where the functional currency is not the U.S. dollar. The company calculates the impact as the difference between the current period results translated using the current period currency exchange rates and using the comparable prior period’s currency exchange rates. The company believes the disclosure of net sales changes in constant currency provides useful supplementary information to investors in light of significant fluctuations in currency rates.

Management believes that these non-GAAP measures may provide a helpful representation of the company’s fourth-quarter and full year performance, and enable comparison of financial results between periods where certain items may vary independent of business performance. These non-GAAP financial measures are presented solely for informational and comparative purposes and should not be regarded as a replacement for corresponding, similarly captioned, GAAP measures.

Fourth-Quarter Conference Call and Replay

Patterson Companies’ fiscal 2020 fourth-quarter earnings conference call will start at 10 a.m. Eastern today. Investors can listen to a live webcast of the conference call at www.pattersoncompanies.com. The conference call will be archived on the Patterson Companies website. A replay of the fiscal 2020 fourth-quarter conference call can be heard for one week at 800-585-8367 and by providing the Conference ID 7898036 when prompted.

About Patterson Companies, Inc.

Patterson Companies, Inc. (Nasdaq: PDCO) is a value-added distributor serving the dental and animal health markets.

Dental Market

Patterson’s Dental segment provides a virtually complete range of consumable dental products, equipment and software, turnkey digital solutions and value-added services to dentists and dental laboratories throughout North America.

Animal Health Market

Patterson’s Animal Health segment is a leading distributor of products, services and technologies to both the production and companion animal health markets in North America and the U.K.

This press release contains, and our officers and representatives may from time to time make, certain “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, including statements regarding future financial performance, and the objectives and expectations of management. Forward-looking statements often include words such as “believes,” “expects,” “anticipates,” “estimates,” “intends,” “plans,” “seeks” or words of similar meaning, or future or conditional verbs, such as “will,” “should,” “could” or “may.” Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, projections, anticipated events and trends, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Our actual results and financial condition may differ materially from those indicated in the forward-looking statements. Therefore, you should not place undue reliance on any of these forward-looking statements.

Any number of factors could affect our actual results and cause such results to differ materially from those contemplated by any forward-looking statements, including, but not limited to, the following: the effects of the highly competitive dental and animal health supply markets in which we compete; the COVID-19 pandemic and measures taken in response thereto; general economic conditions, including political and economic uncertainty; risks from disruption to our information systems; our ability to comply with restrictive covenants in our amended credit agreement; our dependence on relationships with sales representatives, service technicians and customers; our ability to realize the long-term strategic benefits of our acquisition of Animal Health International; potential disruption of distribution capabilities, including service issues with third-party shippers; our ability to provide our sales force and customers with the latest technology; our dependence on suppliers for the manufacture and supply of the products we sell; material changes in our purchasing relationship with suppliers; the risk that private label sales could adversely affect our relationships with suppliers; our dependence on positive perceptions of Patterson’s reputation; risks inherent in acquiring other businesses; the risk that our acquired technology or developed technology might not be successful in maintaining or gaining customers; litigation risks, including new or unanticipated litigation developments and new or unanticipated regulatory investigations; changes in consumer preferences; regulatory restrictions; the cyclicality of the livestock market; the outbreak of an infectious disease within the production animal or companion animal population; pressure from animal rights groups; adverse changes in supplier rebates; fluctuations in quarterly financial results; volatility in the price of our stock; risks from the expansion of customer purchasing power; increases in over-the-counter sales of companion animal products; the risks inherent in international operations, including currency fluctuations; the effects of health care reform; failure to comply with regulatory requirements and data privacy laws; cyberattacks or other privacy or data security breaches; the risk of the products we sell becoming obsolete or containing undetected errors; volatility in the financial markets; our dependence on our senior management; our dependence on leadership development and succession planning; disruptions from our enterprise resource planning system; risks associated with shareholder activism; the risk of being required to record impairment charges; the risk of audit by tax authorities; risks associated with interest rate fluctuations; and the risk that our governing documents and Minnesota law may discourage takeovers and business combinations. The order in which these factors appear should not be construed to indicate their relative importance or priority. We caution that these factors may not be exhaustive, accordingly, any forward-looking statements contained herein should not be relied upon as a prediction of actual results.

You should carefully consider these and other relevant factors, including those risk factors in Part I, Item 1A, (“Risk Factors”) in our most recent Form 10-K, and information which may be contained in our other filings with the U.S. Securities and Exchange Commission, or SEC, when reviewing any forward-looking statement. Investors should understand it is impossible to predict or identify all such factors or risks. As such, you should not consider the foregoing list, or the risks identified in our SEC filings, to be a complete discussion of all potential risks or uncertainties.

Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. We do not undertake any obligation to release publicly any revisions to any forward-looking statements whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise.

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PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

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(Unaudited)

PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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(Unaudited)

PATTERSON COMPANIES, INC.

SALES SUMMARY

(Dollars in thousands)

(Unaudited)

PATTERSON COMPANIES, INC.

SALES SUMMARY

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(Unaudited)

PATTERSON COMPANIES, INC.

OPERATING (LOSS) INCOME BY SEGMENT

(In thousands)

(Unaudited)

PATTERSON COMPANIES, INC.

RECONCILIATION OF GAAP TO NON-GAAP MEASURES

(Dollars in thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

RECONCILIATION OF GAAP TO NON-GAAP MEASURES

(Dollars in thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

FREE CASH FLOW

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(Unaudited)