Exhibit 99.1

PREMIER, INC. REPORTS FISCAL 2015 THIRD-QUARTER RESULTS

CHARLOTTE, NC, May 11, 2015 – Premier, Inc. (NASDAQ: PINC) today reported financial results for the fiscal 2015 third quarter ended March 31, 2015.

Fiscal Third-Quarter Highlights:

“Our strong third-quarter results were driven by continued growth in the demand for Premier products and services across our Supply Chain Services and Performance Services businesses,” said Susan DeVore, president and chief executive officer. “We are building a successful track record of financial performance based on our role as a trusted partner with solutions that enable healthcare providers to comprehensively reduce costs, improve quality and safety and prepare for the rapidly approaching population health management environment.

“In the third quarter, double-digit revenue growth in our Supply Chain Services business was fueled by continued strength in our group purchasing organization and from our direct sourcing and specialty pharmacy businesses,” DeVore said. “Performance Services also produced double digit revenue growth, driven primarily by strong contributions from PremierConnect^® SaaS-based subscriptions and renewals as well as advisory services.”

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Results of Operations for the Third Quarter of Fiscal 2015

Consolidated Third-Quarter and Year-to-Date Financial Highlights

For the fiscal third quarter ended March 31, 2015, Premier generated net revenue of $261.7 million, an increase of 16%, from net revenue of $225.6 million for the same period a year ago.

Adjusted EBITDA of $103.7 million increased 14% from $91.3 million for the same period last year. The increase was driven by revenue growth in both of the company’s business segments, and continued effective management of operating expenses relative to net revenue growth.

Adjusted fully distributed net income for the fiscal third quarter rose to $55.3 million, or $0.38 per fully diluted share, from $49.1 million, or $0.34 per fully diluted share, for the same period a year ago. Adjusted fully distributed earnings per share is a non-GAAP financial measure that represents net income, adjusted for non-recurring and non-cash items, attributable to all shareholders as if all Class B shareholders have converted to Class A shareholders, and reflects income taxes at an estimated effective rate of approximately 40% on 100% of pretax income.

Net income for the quarter totaled $72.0 million, compared with $102.0 million for the same quarter a year ago. The decline is attributable to a one-time investment gain of $37.9 million included in the prior-year period. In accordance with GAAP, net income attributable to shareholders of $12.2 million at March 31, 2015 requires a non-cash adjustment of $(387.1) million, and net income attributable to shareholders of $13.5 million at March 31, 2014 requires a non-cash adjustment of $495.7 million to reflect redeemable limited partners’ capital at the appropriate redemption amount attributable to the limited partners’ Class B common unit ownership at the end of each period. These non-cash adjustments result from changes in the company’s stock price during the period. On a GAAP fully diluted per-share basis, the company reported a net loss attributable to shareholders of $10.05 compared with net income attributable to shareholders of $15.64 a year ago. (See income statement in the tables section of this press release.)

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Segment Results

Supply Chain Services

For the fiscal third quarter ended March 31, 2015, the Supply Chain Services segment generated net revenue of $192.1 million, an increase of 15%, from $167.0 million a year ago. Revenue growth was driven by strong performances of both the company’s group purchasing organization (GPO) and products businesses. GPO net administrative fees revenue of $118.0 million increased 9% from a year ago, reflecting the further contract penetration of existing members, the continuing impact of recruitment and conversion of new members, and the impact of increasing patient utilization. Product sales of $73.4 million increased 25% from a year ago from the ongoing expansion of member support for the company’s direct sourcing and specialty pharmacy businesses.

Supply Chain Services segment adjusted EBITDA of $101.6 million for the fiscal 2015 third quarter increased 11%, from $91.5 million for the same period a year ago. The increase predominantly reflects growth in net administrative fees revenue, as well as continued effective management of operating expenses relative to net revenue growth.

Performance Services

For the fiscal third quarter ended March 31, 2015, the Performance Services segment generated net revenue of $69.6 million, an increase of 19%, from $58.6 million for the same quarter last year. Revenue growth was driven by PremierConnect SaaS-based (software-as-a-service) subscriptions and renewals, and includes TheraDoc and Aperek, which were acquired late in the fiscal first quarter, as well as by advisory services.

Performance Services segment adjusted EBITDA was $26.2 million for the fiscal 2015 third quarter, an increase of 29% from $20.3 million for the same quarter last year. The growth in adjusted EBITDA reflects the sale of new PremierConnect SaaS-based products, including the company’s recent TheraDoc and Aperek acquisitions, and effective management of segment operating expenses relative to net revenue growth.

Results of Operations for the Nine-Months Ended March 31, 2015

Note: Comparisons of GAAP results are impacted by the changes associated with the Reorganization and IPO, as described below, and therefore, management believes they do not provide meaningful year-over-year comparisons. Performance Services segment results are not impacted by non-GAAP pro forma results.

The company generated net revenue of $740.5 million for the nine-month period ended March 31, 2015, an increase of 17% from non-GAAP pro forma net revenue of $633.8 million in the same period last year. Adjusted EBITDA for the nine-month period totaled $293.1 million, an increase of 14% from non-GAAP pro forma adjusted EBITDA of $257.8 million in the same period last year. Adjusted fully distributed net income totaled $155.2 million, or $1.07 per diluted share, compared with non-GAAP pro forma amount of $138.6 million, or $0.96 per diluted share, for the same period last year.

On a GAAP-comparison basis, net revenue of $740.5 million for the nine-month period ended March 31, 2015 increased 10% from net revenue of $675.1 million for the prior year. Adjusted EBITDA of $293.1 million decreased 2% from actual adjusted EBITDA of $299.0 million for the prior year. Net income of $202.7 million compared with $266.0 million for the same period

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last year. In accordance with GAAP, net income attributable to shareholders of $30.8 million at March 31, 2015, requires a non-cash adjustment of $(812.0) million, and net income attributable to shareholders of $19.5 million at March 31, 2014, requires a non-cash adjustment of $(3,224.1) million to reflect redeemable limited partners’ capital at the appropriate redemption amount attributable to the limited partners’ Class B common unit ownership at the end of each period. These non-cash adjustments result from changes in the company’s stock price during the period. On a fully diluted per-share basis, the company reported a net loss attributable to shareholders of $22.28 for the first nine months of fiscal 2015, compared with a net loss attributable to shareholders of $136.99 for the same period a year ago. (See income statement in the tables section of this press release.)

Supply Chain Services segment net revenue for the nine-month period increased 17% to $542.0 million from non-GAAP pro forma net revenue of $464.1 million a year earlier. Supply Chain Services segment adjusted EBITDA increased 11%, to $290.2 million from non-GAAP pro forma adjusted EBITDA of $260.8 million for the same period last year.

Performance Services segment net revenue for the nine-month period increased 17% to $198.4 million from $169.8 million in the same period last year. Performance Services segment adjusted EBITDA increased 25% to $67.7 million from $54.4 million the prior year.

On a GAAP-comparison basis, Supply Chain Services segment net revenue of $542.0 million increased 7% from $505.3 million for the same period a year ago. Segment adjusted EBITDA of $290.2 million decreased 4% from $302.1 million a year ago.

Cash Flows and Liquidity

Cash provided by operating activities was $255.6 million for the nine-month period ended March 31, 2015, compared with $288.7 million for the same period a year ago. Operating cash flows decreased primarily due to the addition of member owner revenue share as a result of the Reorganization and IPO effective October 2013. At March 31, 2015, the company’s cash, cash equivalents, short- and long-term marketable securities totaled $503.3 million, compared with $540.4 million at March 31, 2014, and consisted of $155.6 million in cash and cash equivalents and $347.7 million in marketable securities with maturities ranging from three to 24 months.

Free cash flow for the fiscal third quarter ended March 31, 2015 was $59.5 million, compared with $58.9 million for the same period a year ago. The significant level of free cash flow relative to adjusted EBITDA in the third quarter results from strong performance in the company’s Supply Chain Services segment. The company defines free cash flow as cash provided by operating activities less distributions to limited partners and purchases of property and equipment (see free cash flow reconciliation to net cash provided by operating activities in the tables section of this press release).

At March 31, 2015, there was no outstanding balance on the company’s unsecured $750 million, five-year revolving credit facility.

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Fiscal 2015 Outlook and Guidance

Fiscal 2015 Financial Guidance ⁽¹⁾

Premier, Inc. updates full-year fiscal 2015 financial guidance, as follows:

Based on fiscal third-quarter results and management’s current expectations for the remainder of fiscal 2015, Premier is increasing its full fiscal-year 2015 guidance ranges for consolidated net revenue and non-GAAP adjusted EBITDA, based on the following key assumptions.

The company is increasing its full-year revenue expectations for the Supply Chain Services segment based on assumptions of full-year growth of 6% to 7% in net administrative fees revenue and 27% to 32% in the company’s direct sourcing and specialty pharmacy businesses.

The company is maintaining its existing full-year revenue expectations for the Performance Services segment, based on assumptions of continued revenue growth in PremierConnect SaaS-based subscriptions, continued demand for advisory services, and ongoing member participation in performance improvement collaboratives, in addition to the continuation of historically high renewal rates of SaaS-based offerings.

The company is raising its full-year adjusted EBITDA expectations, based on assumptions of continued growth in the Supply Chain Services segment.

Guidance assumptions do not contemplate the impact of any potential significant future acquisitions. For fiscal 2015, Premier expects capital expenditures of approximately $72.0 million and a consolidated EBITDA margin of approximately 39%.

“We interact with approximately 68% of our nation’s community hospitals, working together to help them reduce costs, improve quality, drive better patient outcomes and build sustainable integrated care delivery strategies for the rapidly approaching future of advanced payment models and the drive to population health,” DeVore said. “We believe our aligned delivery channel, collaborative member relationships, industry-leading data analytics, and exceptional execution uniquely position Premier to continue to lead the transformation of healthcare delivery across our country for years to come.”

The statements in this “Outlook and Guidance” discussion are “forward-looking statements.” For additional information regarding the use and limitations of such statements, see “Forward-Looking Statements” below and the “Risk Factors” section of the company’s Form 10-K for the year ended June 30, 2014.

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Conference Call

Premier management will host a conference call and live audio webcast on Monday, May 11, 2015, at 5:00 p.m. ET, to discuss the company’s financial results. The conference call can be accessed through a link provided on the investor relations page on Premier’s website at investors.premierinc.com. To expedite access, participants should preregister at this website, at which time the participant will be sent a confirmation email including dial-in numbers and a unique PIN for those who wish to participate by phone. A replay of the conference call will be available on the investor relations page of Premier’s website.

About Premier, Inc.

Premier, Inc. (NASDAQ: PINC) is a leading healthcare improvement company, uniting an alliance of approximately 3,400 U.S. hospitals and 110,000 other providers to transform healthcare. With integrated data and analytics, collaboratives, supply chain solutions, and advisory and other services, Premier enables better care and outcomes at a lower cost. Premier, a Malcolm Baldrige National Quality Award recipient, plays a critical role in the rapidly evolving healthcare industry, collaborating with members to co-develop long-term innovations that reinvent and improve the way care is delivered to patients nationwide. Headquartered in Charlotte, N.C., Premier is passionate about transforming American healthcare. Please visit Premier’s news and investor sites on www.premierinc.com; as well as Twitter, Facebook, LinkedIn, YouTube, Instagram, Foursquare and Premier’s blog for more information about the company.

Reorganization and Initial Public Offering

On October 1, 2013, Premier completed its IPO by issuing 32,374,751 shares of its Class A common stock, at a price of $27.00 per share, raising net proceeds of approximately $821.7 million, before expenses. In connection with the IPO, Premier completed the reorganization of the company on October 1, 2013, issuing 112.6 million shares of Class B common stock representing, at that time, 77.7% of the common stock outstanding, and corresponding Class B common units in Premier Healthcare Alliance, L.P. (Premier LP) to its member owners.

The company’s historical consolidated operating results for the nine-month period do not reflect the Reorganization, the IPO and contemplated use of net proceeds from the IPO. Therefore, in addition to presenting the historical actual results, the company presents and discusses non-GAAP pro forma results, which reflect the impact of the company’s Reorganization and IPO and the contemplated use of net proceeds from the IPO, to provide a more comparable indication of future expectations.

The key non-GAAP pro forma adjustments include:

Further details of the Reorganization and non-GAAP pro forma adjustments are in Premier’s Form 10-Q for the fiscal third quarter ended March 31, 2015, expected to be filed with the Securities and Exchange Commission (SEC) on or about May 12, 2015, and accessible on the SEC’s website at www.sec.gov and in the investor relations section of Premier’s website at investors.premierinc.com.

Use and Definition of Non-GAAP Measures

Premier uses EBITDA, adjusted EBITDA, segment adjusted EBITDA, adjusted fully distributed net income, adjusted fully distributed net income per share, and free cash flow to facilitate a comparison of the company’s operating performance on a consistent basis from period to period that, when viewed in combination with its results prepared in accordance with GAAP, provides a more complete understanding of factors and trends affecting the company’s business than GAAP measures alone. The company believes adjusted EBITDA and segment adjusted EBITDA assist its board of directors, management and investors in comparing the company’s operating performance on a consistent basis from period to period because they remove the impact of the company’s asset base (primarily depreciation and amortization) and items outside the control of management (taxes), as well as other non-cash (impairment of intangible assets and purchase accounting adjustments) and non-recurring items, from operations.

In addition, adjusted fully distributed net income eliminates the variability of non-controlling interest as a result of member owner exchanges of Class B common stock and corresponding Class B units into shares of Class A common stock (which exchanges are a member owner’s cumulative right, but not obligation, which began on October 31, 2014, and occur each quarter thereafter, and are limited to one-seventh of the member owner’s initial allocation of Class B common units) and other potentially dilutive equity transactions which are outside of management’s control. Adjusted fully distributed net income is defined as net income attributable to PHSI (i) excluding income tax expense, (ii) excluding the effect of non-recurring and non-cash items, (iii) assuming the exchange of all the Class B common units for shares of Class A common stock, which results in the elimination of non-controlling interest in Premier LP, and (iv) reflecting an adjustment for income tax expense on non-GAAP pro forma fully distributed net income before income taxes at the company’s estimated effective income tax rate.

EBITDA is defined as net income before interest and investment income, net, income tax expense, depreciation and amortization and amortization of purchased intangible assets. Adjusted EBITDA is defined as EBITDA before merger and acquisition related expenses and non-recurring, non-cash or non-operating items, and including equity in net income of unconsolidated affiliates. Non-recurring items include certain strategic and financial restructuring expenses. Non-operating items include gain or loss on disposal of assets. Segment adjusted EBITDA is defined as the segment’s net revenue less operating expenses directly attributable to the segment, excluding depreciation and amortization, amortization of purchased intangible assets, merger and acquisition related expenses and non-recurring or non-cash items, and including equity in net

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income of unconsolidated affiliates. Operating expenses directly attributable to the segment include expenses associated with sales and marketing, general and administrative and product development activities specific to the operation of each segment. General and administrative corporate expenses that are not specific to a particular segment are not included in the calculation of segment adjusted EBITDA. Adjusted EBITDA is a supplemental financial measure used by the company and by external users of the company’s financial statements.

Management considers adjusted EBITDA an indicator of the operational strength and performance of the company’s business. Adjusted EBITDA allows management to assess performance without regard to financing methods and capital structure and without the impact of other matters that management does not consider indicative of the operating performance of the business. Segment adjusted EBITDA is the primary earnings measure used by management to evaluate the performance of the company’s business segments.

Free cash flow is defined as cash provided by operating activities less distributions to limited partners and purchases of property and equipment. Management believes free cash flow is an important measure because it represents the cash that the company generates after payment of tax distributions to limited partners and capital investment to maintain existing products and services as well as development of new and upgraded products and services to support future growth. Free cash flow is important because it allows the Company to enhance shareholder value through acquisitions, partnerships, investments in related or complimentary businesses and debt reductions.

Forward-Looking Statements

Statements made in this release that are not statements of historical or current facts, such as those under the heading “Fiscal 2015 Outlook and Guidance” are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of Premier to be materially different from historical results or from any future results or projections expressed or implied by such forward-looking statements. Accordingly, readers should not place undue reliance on any forward looking statements. In addition to statements that explicitly describe such risks and uncertainties, readers are urged to consider statements in the conditional or future tenses or that include terms such as “believes,” “belief,” “expects,” “estimates,” “intends,” “anticipates” or “plans” to be uncertain and forward-looking. Forward-looking statements may include comments as to Premier’s beliefs and expectations as to future events and trends affecting its business and are necessarily subject to uncertainties, many of which are outside Premier’s control. More information on potential factors that could affect Premier’s financial results is included from time to time in the “Cautionary Note Regarding Forward Looking Statements,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of Premier’s periodic and current filings with the SEC, including those discussed under the “Risk Factors” and “Cautionary Note Regarding Forward Looking Statements” section of Premier’s Form 10-Q for the fiscal third quarter ended March 31, 2015, expected to be filed with the SEC on or about May 12, 2015, and also made available on Premier’s website at investors.premierinc.com. Forward looking statements speak only as of the date they are made, and Premier undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise that occur after that date.

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(Tables Follow)

Consolidated Statements of Income

(Unaudited)

(In thousands, except per share data)

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Consolidated Balance Sheets

(In thousands, except share and per share data)

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Consolidated Statements of Cash Flows

(Unaudited)

(In thousands)

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Supplemental Financial Information - Reporting of Pro Forma Adjusted EBITDA

and Non-GAAP Adjusted Fully Distributed Net Income

Reconciliation of Selected Non-GAAP Measures to GAAP Measures

(Unaudited)

(In thousands)

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Supplemental Financial Information - Reporting of Non-GAAP Free Cash Flow

Reconciliation of Selected Non-GAAP Measures to GAAP Measures

(Unaudited)

(In thousands)

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Supplemental Financial Information - Reporting of Net Income and Earnings Per Share

Reconciliation of Selected Non-GAAP Measures to GAAP Measures

(Unaudited)

(In thousands, except per share data)

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