Exhibit 99.1

News Release

One Centerpointe Drive Suite 200 Lake Oswego, Oregon 97035 503-684-7000                             www.gbrx.com

Greenbrier Reports Third Quarter Results

~ Posts EPS of $1.33, which includes $0.16 of non-recurring costs ~

~ Aggregate gross margin expands to 20.9% ~

~ Backlog grows to $4.86 billion; sixth consecutive quarter of backlog growth ~

Lake Oswego, Oregon, July 1, 2015 – The Greenbrier Companies, Inc. (NYSE: GBX) today reported financial results for its third fiscal quarter ended May 31, 2015.

Third Quarter Highlights

Progress on Longer Term Financial Goals

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William A. Furman, Chairman and CEO, said, “Our diversified and integrated business model continues to pay off, with record revenue, adjusted EBITDA and deliveries this quarter. Aggregate gross margin grew to 20.9%, led by execution from our manufacturing and lease syndication businesses. We achieved our goal of at least 20% aggregate margin a full year ahead of plan despite an abrupt decline in scrap metal prices which adversely affected our wheel services business. Results for the quarter include non-recurring costs of about $5.2 million after-tax, or $0.16 per diluted share, associated with a potential acquisition, for which discussions terminated in June, and advocacy of new tank car safety regulations. Our financial outlook for the year, excluding these non-recurring items, remains within previous guidance.”

“Since the beginning of our fiscal year on September 1, 2014, we have received orders for 29,500 new railcar units valued at $3.0 billion, with approximately 80% of these orders being non-energy related. Our railcar backlog value has grown every quarter since the first quarter of fiscal 2014. The most recent industry data reported for North America is as of March 31, 2015. Our book-to-bill ratio in North America for the 12 months ended March 31, 2015 was 2.6x, nearly 50% higher than 1.8x for the industry as a whole. Our strong commercial performance and diversified product offerings allowed us to capture 43% of all orders placed across the railcar industry in the most recently reported calendar quarter. With deliveries that stretch into 2018, we have a long runway ahead to deliver robust earnings and free cash flow, driving shareholder value. We will continue our balanced approach of reinvesting free cash flow into projects that generate high rates of return, seeking acquisitions in our core competencies and returning capital to shareholders. We remain confident in the long-term strength of our strategy and integrated business model.”

Share Repurchases

We repurchased 28,363 shares of common stock at a cost of $1.5 million during the quarter. Cumulative repurchases from October 31, 2013 through May 31, 2015 aggregate 1,655,587 shares at a cost of $82.9 million, or an average price of $50.05 per share. We have $42.1 million available under our share repurchase program.

Business Outlook

Based on current business trends and industry forecasts, and excluding non-recurring costs of $7.5 million pre-tax, or $0.16 per diluted share from the third quarter, Greenbrier reaffirms previously provided fiscal 2015 annual guidance for Revenue ($2.6 to $2.7 billion), Adjusted EBITDA ($420 to $435 million) and Deliveries (~21,500). Guidance for annual diluted EPS is narrowed to $5.70 to $5.85, excluding non-recurring costs in the third quarter of $0.16 per diluted share.

While gross margins continue to increase overall, management does not believe this track will be linear.

As noted in the “Safe Harbor” statement, there are risks to achieving this guidance. Certain orders and backlog in this release are subject to customary documentation and completion of terms.

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Financial Summary

Segment Summary

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Conference Call

Greenbrier will host a teleconference to discuss its third quarter 2015 results. In conjunction with this news release, Greenbrier has posted a supplemental earnings presentation to our website. Teleconference details are as follows:

Please access the site 10 minutes prior to the start time.

About Greenbrier

Greenbrier, (www.gbrx.com), headquartered in Lake Oswego, Oregon, is a leading supplier of transportation equipment and services to the railroad industry. Greenbrier builds new railroad freight cars in our 4 manufacturing facilities in the U.S. and Mexico and marine barges at our U.S. manufacturing facility. Greenbrier also sells reconditioned wheel sets and provides wheel services at 9 locations throughout the U.S. We recondition, manufacture and sell railcar parts at 4 U.S. sites. Greenbrier is a 50/50 joint venture partner with Watco Companies, LLC in GBW Railcar Services, LLC which repairs and refurbishes freight cars at 33 locations across North America, including 12 tank car repair and maintenance facilities certified by the Association of American Railroads. Greenbrier builds new railroad freight cars and refurbishes freight cars for the European market through our operations in Poland. Greenbrier owns approximately 8,800 railcars, and performs management services for approximately 245,000 railcars.

“SAFE HARBOR” STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995: This press release may contain forward-looking statements, including statements regarding expected new railcar production volumes and schedules, expected customer demand for the Company’s products and services, plans to increase manufacturing capacity, restructuring plans, new railcar delivery volumes and schedules, growth in demand for the Company’s railcar services and parts business, and the Company’s future financial performance. Greenbrier uses words such as “anticipates,” “believes,” “forecast,” “potential,” “goal,” “contemplates,” “expects,” “intends,” “plans,” “projects,” “hopes,” “seeks,” “estimates,” “strategy,” “could,” “would,” “should,” “likely,” “will,” “may,” “can,” “designed to,” “future,” “foreseeable future” and similar expressions to identify forward-looking statements. These forward-looking statements are not guarantees of future performance and are subject to certain risks and uncertainties that could cause actual results to differ materially from in the results contemplated by the forward-looking statements. Factors that might cause such a difference include, but are not limited to, reported backlog and awards are not indicative of our financial results; uncertainty or changes in the credit markets and financial services industry; high levels of indebtedness and compliance with the terms of our indebtedness; write-downs of goodwill, intangibles and other assets in future periods; sufficient availability of borrowing capacity; fluctuations in demand for newly manufactured railcars or failure to obtain orders as anticipated in developing forecasts; loss of one or more significant customers; customer payment defaults or related issues; sovereign risk to contracts, exchange rates or property rights; actual future costs and the availability of materials and a trained workforce; failure to design or manufacture new products or technologies or to achieve certification or market acceptance of new products or technologies; steel or specialty component price fluctuations and availability and scrap surcharges; changes in product mix and the mix between segments; labor disputes, energy shortages or operating difficulties that might disrupt manufacturing operations or the flow of cargo; production difficulties and product delivery delays as a result of, among other matters, inefficiencies associated with expansion or start-up of production lines or increased production rates, changing technologies, transfer of production between facilities or non-performance of alliance partners, subcontractors or

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suppliers; ability to obtain suitable contracts for the sale of leased equipment and risks related to car hire and residual values; integration of current or future acquisitions and establishment of joint ventures; succession planning; discovery of defects in railcars or services resulting in increased warranty costs or litigation; physical damage or product or service liability claims that exceed our insurance coverage; train derailments or other accidents or claims that could subject us to legal claims; actions or inactions by various regulatory agencies including potential environmental remediation obligations or changing tank car or other rail car or railroad regulation; and issues arising from investigations of whistleblower complaints; all as may be discussed in more detail under the headings “Risk Factors” and “Forward Looking Statements” in our Annual Report on Form 10-K for the fiscal year ended August 31, 2014, and our other reports on file with the Securities and Exchange Commission. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s opinions only as of the date hereof. Except as otherwise required by law, we do not assume any obligation to update any forward-looking statements.

Adjusted EBITDA is not a financial measure under generally accepted accounting principles (GAAP). We define Adjusted EBITDA as Net earnings before Interest and foreign exchange, Income tax expense, Depreciation and amortization. Adjusted EBITDA is a performance measurement tool commonly used by rail supply companies and Greenbrier. You should not consider Adjusted EBITDA in isolation or as a substitute for other financial statement data determined in accordance with GAAP. In addition, because Adjusted EBITDA is not a measure of financial performance under GAAP and is susceptible to varying calculations, this measure presented may differ from and may not be comparable to similarly titled measures used by other companies.

Annualized ROIC is calculated by taking year to date Earnings from operations, less cash paid for income taxes, net, which is then annualized and divided by the average balance of the sum of the Revolving notes, plus Notes payable, plus Total equity, less cash in excess of $40 million. The average is calculated based on the quarterly ending balances.

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THE GREENBRIER COMPANIES, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, unaudited)

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THE GREENBRIER COMPANIES, INC.

CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share amounts, unaudited)

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THE GREENBRIER COMPANIES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands, unaudited)

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THE GREENBRIER COMPANIES, INC.

SUPPLEMENTAL INFORMATION

(In thousands, except per share amounts, unaudited)

Operating Results by Quarter for 2015 are as follows:

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THE GREENBRIER COMPANIES, INC.

SUPPLEMENTAL INFORMATION

(In thousands, except per share amounts, unaudited)

Operating Results by Quarter for 2014 are as follows:

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THE GREENBRIER COMPANIES, INC.

SUPPLEMENTAL INFORMATION

(In thousands, unaudited)

Segment Information

Three months ended May 31, 2015:

Three months ended February 28, 2015:

The results of operations for GBW, which are shown below, are not reflected in the above tables as the investment is accounted for under the equity method of accounting.

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THE GREENBRIER COMPANIES, INC.

SUPPLEMENTAL INFORMATION

(In thousands, excluding backlog and delivery units, unaudited)

Reconciliation of Net earnings to Adjusted EBITDA

Adjusted EBITDA is not a financial measure under generally accepted accounting principles (GAAP). We define Adjusted EBITDA as Net earnings before interest and foreign exchange, income tax expense, depreciation and amortization. Adjusted EBITDA is a performance measurement tool commonly used by rail supply companies and Greenbrier. You should not consider Adjusted EBITDA in isolation or as a substitute for other financial statement data determined in accordance with GAAP. In addition, because Adjusted EBITDA is not a measure of financial performance under GAAP and is susceptible to varying calculations, the Adjusted EBITDA measure presented may differ from and may not be comparable to similarly titled measures used by other companies.

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THE GREENBRIER COMPANIES, INC.

SUPPLEMENTAL INFORMATION

(In thousands, except per share amounts, unaudited)

Reconciliation of common shares outstanding and diluted earnings per share

The shares used in the computation of the Company’s basic and diluted earnings per common share are reconciled as follows:

Diluted earnings per share was calculated using the more dilutive of two approaches. The first approach includes the dilutive effect of shares underlying the 2026 Convertible notes in the share count using the treasury stock method. The second approach supplements the first by including the “if converted” effect of the 2018 Convertible notes issued in March 2011. Under the “if converted method” debt issuance and interest costs, both net of tax, associated with the convertible notes are added back to net earnings and the share count is increased by the shares underlying the convertible notes.

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