Exhibit 99.1

STAG INDUSTRIAL ANNOUNCES FOURTH QUARTER AND FULL YEAR

2015 RESULTS

Boston, MA — February 25, 2016 - 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 fourth quarter 2015.

“The fourth quarter was a strong finish to a solid operational year for STAG,” said Ben Butcher, Chief Executive Officer of the Company.  “This was readily apparent in the continuation of our robust leasing activity, healthy acquisition volume, continued asset dispositions and resultant portfolio improvements and most importantly, continued strong earnings growth.”

Highlights:

•                   Achieved $0.40 of Core FFO per diluted share for the fourth quarter of 2015, an increase of 8.1% compared to the fourth quarter ended December 31, 2014. Generated Core FFO of $28.3 million compared to $23.9 million for the fourth quarter of 2014, an increase of 18.3%. For the year ended December 31, 2015, Core FFO increased 23.9% in the aggregate compared to the same period last year.

•                   Generated Cash NOI of $48.8 million compared to $41.4 million for the fourth quarter of 2014, an increase of 18.0%. For the year ended December 31, 2015, Cash NOI increased 27.0% in the aggregate compared to the same period last year.

•                   Acquired 14 buildings consisting of 3.1 million square feet for $138 million with an aggregate Capitalization Rate of 8.8% in the fourth quarter of 2015. For the year ended December 31, 2015, the Company acquired 49 buildings consisting of 8.7 million square feet for $427 million with an aggregate Capitalization Rate of 8.4%.

•                   Sold four buildings consisting of 486,577 square feet for $13 million during the fourth quarter. For the year ended December 31, 2015, sold six buildings consisting of 808,387 square feet for $22 million.

•                   Achieved occupancy of 95.6% and executed leases for 1.4 million square feet for the fourth quarter of 2015. Achieved an increase in cash and GAAP rent of 0.5% and 12.0%, respectively, for the quarter’s leasing activity. For the year ended December 31, 2015, executed leases for 5.7 million square feet and achieved an increase in cash and GAAP rent of 1.6% and 7.1%, respectively, for the year’s leasing activity.

•                   Experienced 69.8% Retention for 4.9 million square feet of leases expiring in the year. Achieved an increase in cash and GAAP rent of 4.2% and 8.4%, respectively, for the year’s renewals.

•                   Agreed to pricing of a new $100 million private placement of senior unsecured notes, and issued the notes on December 15, 2015. The notes pay a fixed rate of 3.98% and mature on January 5, 2023.

•                   Subsequent to year end, appointed William R. Crooker to serve as the Company’s Chief Financial Officer, Executive Vice President, and Treasurer effective January 26, 2016.

Please refer to the Non-GAAP Financial Measures and Other Defined Terms section at the end of this release for definitions of capitalized terms used in this release.

The Company will host a conference call tomorrow, February 26, 2016, to discuss the quarter’s results and provide information about acquisitions, operations, capital markets, and corporate activities. Details of the call can be found at the end of this release.

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Key Financial Measures

For the three months ended December 31, 2015, Cash NOI was $48.8 million, which represents growth of 18.0% as compared to the three months ended December 31, 2014. Contributions to the growth in Cash NOI includes $7.7 million related to acquisition volume (net of dispositions), $(0.9) million of termination fee income, and $0.6 million from same store operations over the comparison period. Adjusting Cash NOI to account for termination income and the timing of acquisitions and dispositions, Run Rate Cash NOI would have been $49.3 million for the three months ended December 31, 2015.

Adjusted EBITDA was $41.9 million for the three months ended December 31, 2015, which represents growth of 23.2% over the three months ended December 31, 2014. Adjusting Adjusted EBITDA to account for the timing of acquisitions and dispositions, Run Rate Adjusted EBITDA would have been $43.8 million for the three months ended December 31, 2015.

For the three months ended December 31, 2015, Core FFO was $28.3 million, which represents growth of 18.3% as compared to the three months ended December 31, 2014. On a diluted, per share basis, Core FFO was $0.40 which represents growth of 8.1% compared to the three months ended December 31, 2014.

Net loss for the three months ended December 31, 2015 was $20.1 million. Included in net loss is depreciation and amortization expense of $30.5 million and a loss on impairments of $20.9 million related to 10 buildings. The impairments are primarily related to legacy, non-core flex/office assets that the Company is actively looking to dispose of to enhance the quality of the portfolio.

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

KEY FINANCIAL MEASURES

Definitions of Cash NOI, Run Rate Cash NOI, Adjusted EBITDA, FFO, Core FFO, and AFFO, 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.

Acquisition & Disposition Activity

During the three months ended December 31, 2015, the Company acquired 14 buildings consisting of 3.1 million square feet for $138 million with an aggregate Capitalization Rate of 8.8%. These buildings had a weighted average occupancy rate of 94.6% upon acquisition. The chart below details the acquisition activity for the three months ended December 31, 2015:

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FOURTH QUARTER 2015 ACQUISITION ACTIVITY

(1) Core based statistical area

(2) Excludes property acquisition costs

For the year ended December 31, 2015, the Company acquired 49  buildings consisting of 8.7 million square feet for $427 million with an aggregate Capitalization Rate of 8.4%. The chart below details the acquisition activity for the year ended December 31, 2015:

2015 ACQUISITION ACTIVITY

(1) Excludes property acquisition costs

Subsequent to quarter end and through February 25, 2016, the Company acquired three additional buildings consisting of 471,574 square feet for $17.8 million. These buildings were under contract as of December 31, 2015.  As of February 25, 2016, the Company had entered into two contracts to acquire another two buildings for $10.1 million. The Company also executed non-binding letters of intent (“LOIs”) to acquire four additional buildings for $47.8 million.(1)

As of February 25, 2016, the Company’s Pipeline of potential acquisitions is $1.4 billion across 136 buildings.

During the three months ended December 31, 2015, the Company sold four buildings consisting of 486,577 square feet for $12.8 million, resulting in a gain on sales of $3.3 million.  For the year ended December 31, 2015 the Company sold six buildings consisting of 808,387 square feet for $22.1 million, resulting in a gain on sales of $5.0 million.

(1) 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.

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Leasing Activity

During the three months ended December 31, 2015, the Company executed ten leases consisting of 1.4 million square feet. The chart below details the leases signed:

FOURTH QUARTER 2015 LEASING ACTIVITY

For the year ended December 31, 2015, the Company executed 55 leases consisting of approximately 5.7 million square feet. The chart below details the leasing activity for the year ended December 31, 2015:

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 (six leases / 414,392 SF)

The Company experienced 49.2% Retention for 806,030 square feet of leases expiring in the quarter. This Retention rate was impacted by one lease for 400,000 square feet, 200,000 square feet of which the Company relet with no downtime. The Retention for the year ended December 31, 2015 was 69.8% for 4.9 million square feet of leases expiring. The chart below details the quarterly retention activity:

2015 RETENTION

Portfolio Highlights

The Company’s occupancy rate at the end of the fourth quarter was 95.6% compared to the prior year occupancy level of 94.9%. The Company’s portfolio totaled approximately 54.7 million square feet as of December 31, 2015, representing an increase in square footage of 16.3% since December 31, 2014.  The chart below details the portfolio characteristics:

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PORTFOLIO CHARACTERISTICS

(1) Excludes flex / office buildings

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

TENANT CREDIT PROFILE (1)

(1) Includes tenants, guarantors, and / or non-guarantor parents

Liquidity, Capital Markets Activity, and Financial Statistics

As of December 31, 2015, the Company had total Debt Capacity of $544 million and liquidity of $422 million, comprised of $12 million of cash and $410 million of Immediate Availability on the Company’s unsecured credit facility and unsecured term loans.

On October 6, 2015, the Company agreed to the pricing of a $100 million note purchase agreement providing for the future private placement of senior unsecured notes (“Series F”). On December 15, 2015, the Company issued the $100 million Series F notes which bear interest at a fixed rate of 3.98% and mature on January 5, 2023.

On December 16, 2015, the Company funded the previously committed $150 million unsecured, 7-Year Term Loan B. The proceeds were used to repay amounts drawn under the unsecured Revolving Credit Facility.

As of December 31, 2015, the Company’s enterprise value was approximately $2.4 billion, comprised of $1.3 billion of equity market capitalization, $139 million of preferred equity and total debt of $987 million.

As of December 31, 2015, the Company had approximately $987 million of debt outstanding with a weighted average remaining term of 6.5 years and a weighted average interest rate of 4.1%. All of the outstanding floating rate debt is fixed through interest rate swaps except for the Revolving Credit Facility.

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

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DEBT CAPITAL STRUCTURE AND FINANCIAL RATIOS

During the three months ended December 31, 2015, the Company did not issue any shares of common stock under its ATM program. The Company has one ATM program with a total of $107 million of additional issuance capacity.  The chart below details the ATM activity:

2015 ATM ACTIVITY

(1) Last shares sold June 30, 2015 and closed July 6, 2015

For the year ended December 31, 2015, the Company raised $97.8 million of equity consisting of $74.9 million in gross proceeds raised through the ATM programs and $22.9 million of common units in the Operating Partnership privately placed in connection with an acquisition.

Dividends

On October 22, 2015 the Board of Directors declared a monthly common stock dividend of $0.115833 per share commencing with the January 2016, equating to an annual dividend rate of $1.39.

Subsequent to quarter end, on February 22, 2016, the Company’s Board of Directors declared a monthly common stock dividend of $0.115833 per share for the months of April, May, and June 2016. The chart below details the common dividends declared:

Q1 2016 & Q2 2016 COMMON DIVIDENDS DECLARED

Subsequent to quarter end, on February 22, 2016, the Company’s Board of Directors declared the first 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

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share, which equates to $1.65625 per share on an annualized basis. The record date for the preferred stock dividends is March 15, 2016, and the dividends are payable March 31, 2016.

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

Conference Call

The Company will host a conference call tomorrow, Friday, February 26, 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 13628453.

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.

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)