Exhibit 99.1

STAG INDUSTRIAL ANNOUNCES SECOND QUARTER

2015 RESULTS

Boston, MA — July 23, 2015 - STAG Industrial, Inc. (the “Company”) (NYSE:STAG), a real estate investment trust focused on the acquisition and operation of single-tenant, industrial properties throughout the United States, today announced its financial and operating results for the second quarter 2015.

“The second quarter marked continued progress on all operational fronts,” said Ben Butcher, Chief Executive Officer of the Company.  “From the apparent, such as strong acquisitions, continued pipeline growth, robust leasing activity, and a very successful inaugural investor day, to the less apparent, such as the continued development of our people, systems, and processes, STAG’s business and its execution are stronger now than at any point in the Company’s history.”

Second Quarter Highlights:

·                  Generated Cash NOI of $43.4 million compared to $33.7 million for the second quarter of 2014, an increase of 29.0%. For the six months ended June 30, 2015, Cash NOI increased 29.3% in the aggregate compared to the same period last year.

·                  Generated Core FFO of $24.7 million compared to $20.3 million for the second quarter of 2014, an increase of 21.7%. This represents $0.36 of Core FFO per diluted share for the second quarter of 2015. For the six months ended June 30, 2015, Core FFO increased 23.1% in the aggregate compared to the same period last year.

·                  Acquired 12 industrial buildings consisting of approximately 1.6 million square feet for $83.8 million. In the aggregate, the properties were purchased for an 8.4% capitalization rate. The acquired buildings were 94.0% occupied at closing.

·                  Closed or under price agreement on a total of $381 million of acquisitions year-to-date, representing over 80% of the Company’s $450 million target for 2015.

·                  Achieved quarter-end occupancy on the Company’s portfolio of 95.0%, executing leases for approximately 2.1 million square feet. Achieved an increase in cash and GAAP rent of 2.8% and 8.5%, respectively, for the quarter’s leasing activity.

·                  Experienced 29.2% retention for 468,169 square feet of leases expiring in the quarter, as one tenant moved out in a quarter of extraordinarily low lease expirations. Achieved a retention rate of 68.8% for 3.8 million square feet over the trailing 12 months ended June 30, 2015.  Achieved an increase in cash and GAAP rent of 3.9% and 10.0%, respectively, for the quarter’s renewals.

·                  Raised gross proceeds of $61.7 million of equity at a weighted average price of $21.36 per share through the Company’s ATM programs.

·                  On May 4, 2015, received an upgrade from Fitch Ratings on the Company’s investment grade rating to BBB.

·                  On June 3, 2015, held inaugural Investor Day. The event was attended by over 60 industry professionals and included a full day of presentations and property tours. The audio replay of the presentation, with accompanying slides, is available in the Investor Relations section of the Company’s website at www.stagindustrial.com or through the following link: http://ir.stagindustrial.com/corporateprofile.aspx?iid=4263385

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·                  On May 4, 2015, increased the monthly common stock dividend by 2.2% to $0.1150 per share.

The Company will host a conference call tomorrow to discuss the quarter’s results and provide future estimates regarding acquisitions, asset management, capital markets, and corporate activities. Details of the call can be found at the end of this release.

Key Financial Measures

For the three months ended June 30, 2015, Cash NOI was $43.4 million, which represents growth of 29.0% as compared to the three months ended June 30, 2014. Contributions to the growth in Cash NOI include $9.3 million related to acquisition volume and $0.4 million from same store growth over the comparison period. Adjusting Cash NOI to account for the timing of acquisitions, stabilized run rate Cash NOI would have been $44.4 million for the three months ended June 30, 2015.

Adjusted EBITDA was $36.5 million for the three months ended June 30, 2015, which represents growth of 26.1% over the three months ended June 30, 2014. Included in Adjusted EBITDA is General and Administrative expenses which increased 37.7% as compared to the three months ended June 30, 2014 when excluding non-recurring Consultant Services of $2.8 million. This growth is primarily related to the expansion of the Company’s platform as the Company continues to prepare for future growth and a change in the vesting period of non-cash compensation awards.

For the three months ended June 30, 2015, Core FFO was $24.7 million, which represents growth of 21.7% as compared to the three months ended June 30, 2014. On a diluted, per share basis, Core FFO was flat over the same comparison period, primarily driven by the increase in General and Administrative expenses included in Adjusted EBITDA.

Net Loss for the three months ended June 30, 2015 was $5.2 million. Included in Net Loss is Depreciation and Amortization expense of $27.3 million and a Loss on Impairment of $2.6 million related to a vacant, legacy building.  The Company entered into a contract to sell this asset prior to June 30, 2015. Based on management’s assessment of the various hold and sell scenarios, management determined that its investment in the property was impaired.  Accordingly, the property was written down to its estimated fair value resulting in a Loss on Impairment of $2.6 million for the quarter ended June 30, 2015.

Definitions of Cash NOI, Adjusted EBITDA, Core FFO, FFO, and Adjusted FFO, all non-GAAP financial measures, together with reconciliations to Net Income (Loss) in accordance with GAAP, appear at the end of this release. Please also see the Company’s supplemental information package for additional disclosure.

The Company’s key financial measures are noted in the chart below:

KEY FINANCIAL MEASURES (1)

(1) See Non-GAAP Financial Measures and Other Definitions section for definition

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Acquisition & Disposition Activity

The Company has closed or is under price agreement on a total of $381 million of acquisitions year-to-date. This represents over 80% of the Company’s targeted 2015 acquisitions volume of $450 million.

During the three months ended June 30, 2015, the Company acquired 12 industrial buildings consisting of approximately 1.6 million square feet for $83.8 million for an 8.4% capitalization rate. The acquired buildings were 94.0% occupied at closing.

The chart below details the acquisition activity for the three months ended June 30, 2015:

SECOND QUARTER 2015 ACQUISITIONS

(1) Core based statistical area

(2) Excludes property acquisition costs

During the six months ended June 30, 2015, the Company acquired 17 industrial buildings consisting of approximately 3.1 million square feet for $180.9 million. The chart below details the acquisition activity during the six months ended June 30, 2015:

2015 ACQUISITION ACTIVITY

(1) Excludes property acquisition costs

(2) See Non-GAAP Financial Measures and Other Definitions section for definition

Subsequent to quarter-end and through July 22, 2015, the Company acquired an additional industrial building consisting of 201,670 square feet for $12 million. These buildings were under contract as of June 30, 2015.  As of July 22, 2015, the Company had entered into contracts to acquire another 22 industrial buildings for $142 million. The Company also executed non-binding letters of intent (“LOI”) to acquire four additional industrial buildings for $46 million. In the aggregate, the Company has acquired and is in the process of acquiring an additional 27 industrial buildings for $200 million subsequent to quarter-end.

As of July 22, 2015, the Company’s pipeline of potential acquisitions is $1.8 billion across 166 industrial buildings.  The pipeline is a point in time measure that includes all of the transactions under consideration

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by the Company’s acquisitions group that have passed the initial screening process.  The pipeline also includes transactions under contract and transactions with non-binding LOIs.

The purchase and sale agreements for the properties under contract are subject to satisfaction of closing conditions, and the properties under LOI require the negotiation and execution of definitive purchase and sale agreements.  There can be no assurance that any of the properties under contract or LOI will be acquired on the terms anticipated or at all.  In addition, there can be no assurance that the Company will achieve its targeted acquisition level for 2015.

There were no dispositions during the quarter.

Leasing Activity

During the three months ended June 30, 2015, the Company executed 15 leases consisting of approximately 2.1 million square feet. The chart below details the leases signed:

SECOND QUARTER 2015 LEASING ACTIVITY

(1)         Rent change for new leases where there were no prior comparable leases, due to extended downtime or materially different lease structures, are excluded (two leases / 176,000 SF)

During the six months ended June 30, 2015, the Company executed 24 leases consisting of approximately 2.6 million square feet, including 552,495 square feet of new leases, 1.5 million square feet of renewal leases, and 610,600 square feet of temporary leases. The chart below details the leasing activity:

2015 LEASING ACTIVITY

Experienced 29.2% retention for 468,169 square feet of leases expiring in the quarter as one tenant moved out in a quarter of extraordinarily low lease expirations. The retention rate for the six months ended June 30, 2015 was 55.9% for 1.1 million square feet. Achieved a retention rate of 68.8% for 3.8 million square feet over the trailing 12 months ended June 30, 2015. The rental rate on the renewed leases expiring in the second quarter increased 3.9% on a cash basis and 10.0% on a GAAP basis. The chart below details the retention activity:

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2015 RETENTION (1)

(1) See Non-GAAP Financial Measures and Other Definitions section for definition

Subsequent to quarter-end and through July 22, 2015, the Company has executed three leases consisting of 229,891 square feet.

Portfolio Highlights

The Company’s occupancy rate at the end of the second quarter was 95.0% compared to the first quarter occupancy level of 94.4%, representing an increase of 0.6%. The Company’s portfolio, inclusive of acquisitions and dispositions, totaled approximately 50.0 million square feet as of June 30, 2015, representing an increase in square footage of 21.3% since June 30, 2014.  The chart below details the portfolio characteristics:

PORTFOLIO CHARACTERISTICS

(1) Excludes flex / office buildings

The chart below details the Company’s market exposure:

BUILDINGS BY LOCATION CLASSIFICATION

(1) See Non-GAAP Financial Measures and Other Definitions section for definition

The chart below details the Company’s tenant credit profile:

TENANT CREDIT PROFILE (1)

(1) Percentages based on annualized base rental revenue and includes tenants, guarantors, and / or non-guarantor parents;

see Non-GAAP Financial Measures and Other Definitions section for definition.

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Liquidity, Capital Markets Activity, and Financial Statistics

On May 4, 2015, Fitch Ratings upgraded its investment grade rating to BBB for STAG Industrial, Inc. and its operating partnership STAG Industrial Operating Partnership L.P. In addition, Fitch Ratings upgraded the preferred stock to BB+.

As of June 30, 2015, the Company had total immediate liquidity of $375 million, comprised of $12 million of cash and $363 million of immediate availability on the Company’s unsecured credit facility and unsecured term loan. This liquidity is sufficient to address the Company’s remaining anticipated 2015 acquisitions.

As of June 30, 2015, the Company’s enterprise value was approximately $2.3 billion comprised of $1.4 billion of equity market capitalization, $139 million of preferred equity and total debt of $765 million.

As of June 30, 2015, the Company had approximately $765 million of debt outstanding with a weighted average remaining term of 7.1 years and a weighted average interest rate of 4.4%. All of the outstanding floating rate debt is fixed through interest rate swaps as of June 30, 2015.

The chart below details the Company’s debt capital structure and financial ratios:

DEBT CAPITAL STRUCTURE AND FINANCIAL RATIOS

(1) Real estate cost basis is equal to the book value of rental property and deferred leasing intangibles, exclusive of the related accumulated depreciation and amortization

(2) See Non-GAAP Financial Measures and Other Definitions section for definition.

(3) Adjusted EBITDA divided by interest expense less non-cash portion of interest expense

During the three months ended June 30, 2015, the Company issued 2.9 million shares of common stock under its ATM programs realizing gross proceeds of $61.7 million. The Company has one ATM program with a total of $110 million of additional issuance capacity.  The chart below details the ATM activity:

2015 ATM ACTIVITY

During the six months ended June 30, 2015, the Company raised $93.7 million of equity consisting of $71.8 million in proceeds raised through the ATM programs and $21.9 million of Common Units in the Operating Partnership (“OP Units”) privately placed in connection with an acquisition. The Company continues to utilize its ATM programs as its primary source of equity capital. The Company expects to continue to rely on the ATM programs in the future as its primary source of equity and will execute discrete follow-on offerings as required and available. The Company also intends to increase its use of

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the OP Unit transactional structure to acquire properties as it provides the Company an attractive avenue to efficiently raise equity capital.

Dividends

On May 4, 2015 the Board of Directors declared an increase in the monthly dividend of 2.2% to $0.1150 per share effective July 2015.

Subsequent to quarter-end, on July 21, 2015, the Company’s Board of Directors declared the monthly dividend of $0.1150 per share for the months of October, November, and December. The chart below details the common dividends declared:

Q3 & Q4 2015 COMMON DIVIDENDS DECLARED

Subsequent to quarter-end, on July 21, 2015, the Company’s Board of Directors declared the third quarter preferred stock dividends for its 9.0% Series A Cumulative Redeemable Preferred Stock (NYSE: STAG Pr A) (“Series A Preferred”) and its 6.625% Series B Cumulative Redeemable Preferred Stock (NYSE: STAG Pr B) (“Series B Preferred”). The quarterly dividend for the Series A Preferred is $0.5625 per share, which equates to $2.25 per share on an annualized basis, and the quarterly dividend for the Series B Preferred is $0.4140625 per share, which equates to $1.65625 per share on an annualized basis. The record date for the preferred stock dividends is September 15, 2015, and the dividends are payable September 30, 2015.

The Company’s dividend policy is set by the Board of Directors, which considers, among other factors, a combination of (i) REIT distribution requirements and (ii) recurring, distributable, cash income.

Conference Call

The Company will host a conference call tomorrow, at 10:00 a.m. (Eastern Time) to discuss the quarter’s results.  The call can be accessed live over the phone toll-free by dialing (877) 407-4018, or for international callers, (201) 689-8471.  A replay will be available shortly after the call and can be accessed by dialing (877) 870-5176, or for international callers, (858) 384-5517.  The passcode for the replay is 13614055.

Interested parties may also listen to a simultaneous webcast of the conference call by visiting the Investor Relations section of the Company’s website at www.stagindustrial.com, or by clicking on the following link:

http://ir.stagindustrial.com/corporateprofile.aspx?iid=4263385

Supplemental Schedules

The Company has provided a supplemental information package to provide additional disclosure and financial information on its website (www.stagindustrial.com) under the “Presentations” tab in the Investor Relations section.

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Additional information is also available on the Company’s website at www.stagindustrial.com.

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CONSOLIDATED BALANCE SHEETS

STAG Industrial, Inc.

(unaudited, $000s, except share data)

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CONSOLIDATED STATEMENTS OF OPERATIONS

STAG Industrial, Inc.

(unaudited, $000s, except share data)

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STAG Industrial, Inc.

(unaudited, $000s, except share data)

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RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

STAG Industrial, Inc.

(unaudited, $000s, except share data)