Exhibit 99.1

FOR IMMEDIATE RELEASE

Plains All American Pipeline, L.P. and Plains GP Holdings Report Fourth-Quarter and Full-Year 2015 Results

(Houston — February 8, 2016) Plains All American Pipeline, L.P. (NYSE: PAA) and Plains GP Holdings (NYSE: PAGP) today reported fourth-quarter and full-year 2015 results.

Plains All American Pipeline, L.P.

Summary Financial Information (1) (unaudited)

(in millions, except per unit data)

(1)             PAA’s reported results include the impact of items that affect comparability between reporting periods. The impact of certain of these items is excluded from adjusted results. See the section of this release entitled “Non-GAAP Financial Measures and Selected Items Impacting Comparability” and the tables attached hereto for information regarding certain selected items that PAA believes impact comparability of financial results between reporting periods, as well as for information regarding non-GAAP financial measures (such as adjusted EBITDA) and their reconciliation to the most directly comparable measures as reported in accordance with GAAP.

“PAA reported fourth-quarter and full-year 2015 results with adjusted EBITDA of $563 million and $2.17 billion, respectively, which were slightly below the low end of our guidance ranges issued last November,” said Greg Armstrong, Chairman and CEO of Plains All American.  “Our fourth-quarter results were negatively impacted by approximately $15 million associated with deficiencies on minimum volume commitments and an approximate $15 million shift in earnings recognition on certain NGL sales activities from the fourth quarter of 2015 to the first quarter of 2016.  This earnings shift is primarily the result of delayed inventory draws due to unseasonably warm temperatures in certain parts of the U.S. and Canada as well as impacts of inventory pricing during the fourth quarter. Additionally, severe weather in West Texas and the Mid-continent resulted in volume shortfalls impacting results by approximately $5 million.”

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Armstrong stated that the partnership is well positioned to manage through near-term challenges and to grow meaningfully in the intermediate and long-term as industry conditions improve.

“The $1.6 billion of proceeds from our recent preferred equity placement satisfies PAA’s equity financing needs for 2016 and substantially all of 2017 and enables PAA to complete its multi-year, multi-billion dollar capital expansion program, while maintaining substantial liquidity and a solid balance sheet.”

Armstrong continued, “PAA has visibility for incremental cash flow contributions over the next 24 months from the completion of these projects, the majority of which are backed by minimum volume commitments and other contractual support.  These projects enhance PAA’s existing footprint and provide further significant leverage to a sustained increase in U.S. production levels with little to no incremental investment.”

The following table summarizes selected PAA financial information by segment for the fourth quarter and full year of 2015:

Summary of Selected Financial Data by Segment (1) (unaudited)

(in millions)

(1)             PAA’s reported results include the impact of items that affect comparability between reporting periods. The impact of certain of these items is excluded from adjusted results. See the section of this release entitled “Non-GAAP Financial Measures and Selected Items Impacting Comparability” and the tables attached hereto for information regarding certain selected items that PAA believes impact comparability of financial results between reporting periods.

(2)             Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

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Fourth-quarter 2015 Transportation adjusted segment profit decreased 5% versus comparable 2014 results. This decrease was primarily driven by lower pipeline loss allowance revenue due to a lower realized average price per barrel during fourth-quarter 2015, partially offset by higher equity earnings from our 50% interest in the BridgeTex pipeline.

Fourth-quarter 2015 Facilities adjusted segment profit decreased 1% versus comparable 2014 results. This decrease was primarily due to lower revenues associated with our rail and natural gas storage activities, partially offset by increased storage revenue at our west coast terminals.

Fourth-quarter 2015 Supply and Logistics adjusted segment profit decreased by 9% relative to comparable 2014 results. This decrease was primarily driven by lower volumes and margins associated with our crude oil lease gathering due to less favorable market conditions as a result of increased competition. This decrease was partially offset by increased margins on NGL sales.

Plains GP Holdings

PAGP’s sole assets are its ownership interest in PAA’s general partner and incentive distribution rights.  As the control entity of PAA, PAGP consolidates PAA’s results into its financial statements, which is reflected in the condensed consolidating balance sheet and income statement included at the end of this release.  Information regarding PAGP’s distributions is reflected below:

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Conference Call

PAA and PAGP will hold a conference call on February 9, 2016 (see details below).  Prior to this conference call, PAA will furnish a current report on Form 8-K, which will include material in this news release as well as PAA’s financial and operational guidance for the first quarter and full year of 2016.  A copy of the Form 8-K will be available at www.plainsallamerican.com, where PAA and PAGP routinely post important information.

The PAA and PAGP conference call will be held at 11:00 a.m. ET on Tuesday, February 9, 2016 to discuss the following items:

1.              PAA’s fourth-quarter and full-year 2015 performance;

2.              The status of major expansion projects;

3.              Capitalization and liquidity;

4.              Financial and operating guidance for the first quarter and full year of 2016; and

5.              PAA’s and PAGP’s outlook for the future.

Conference Call Access Instructions

To access the Internet webcast of the conference call, please go to www.plainsallamerican.com, under the “Investor Relations” section of the website (Navigate to: Investor Relations / either “PAA” or “PAGP” / News & Events / Quarterly Earnings).  Following the live webcast, the call will be archived for a period of sixty (60) days on the website.

Alternatively, access to the live conference call is available by dialing toll free (800) 230-1092. International callers should dial (612) 288-0329.  No password is required.  The slide presentation accompanying the conference call will be available a few minutes prior to the call under the “Events and Presentations” tab of the PAA and PAGP Investor Relations sections of the above referenced website.

Telephonic Replay Instructions

To listen to a telephonic replay of the conference call, please dial (800) 475-6701, or (320) 365-3844 for international callers, and enter replay access code 383078.  The replay will be available beginning Tuesday, February 9, 2016, at approximately 1:00 p.m. ET and will continue until 11:59 p.m. ET on March 9, 2016.

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Non-GAAP Financial Measures and Selected Items Impacting Comparability

To supplement our financial information presented in accordance with GAAP, management uses additional measures that are known as “non-GAAP financial measures” (such as adjusted EBITDA and implied distributable cash flow (“DCF”)) in its evaluation of past performance and prospects for the future. Management believes that the presentation of such additional financial measures provides useful information to investors regarding our performance and results of operations because these measures, when used in conjunction with related GAAP financial measures, (i) provide additional information about our core operating performance and ability to generate and distribute cash flow, (ii) provide investors with the financial analytical framework upon which management bases financial, operational, compensation and planning decisions and (iii) present measurements that investors, rating agencies and debt holders have indicated are useful in assessing us and our results of operations. These measures may exclude, for example, (i) charges for obligations that are expected to be settled with the issuance of equity instruments, (ii) the mark-to-market of derivative instruments that are related to underlying activities in another period (or the reversal of such adjustments from a prior period), gains and losses on derivatives that are related to investing activities (such as the purchase of linefill) and inventory valuation adjustments, as applicable, (iii) long-term inventory costing adjustments, (iv) items that are not indicative of our core operating results and business outlook and/or (v) other items that we believe should be excluded in understanding our core operating performance. We have defined all such items as “Selected Items Impacting Comparability.”  We consider an understanding of these selected items impacting comparability to be material to the evaluation of our operating results and prospects.

Although we present selected items that we consider in evaluating our performance, you should also be aware that the items presented do not represent all items that affect comparability between the periods presented. Variations in our operating results are also caused by changes in volumes, prices, exchange rates, mechanical interruptions, acquisitions and numerous other factors. These types of variations are not separately identified in this release, but will be discussed, as applicable, in management’s discussion and analysis of operating results in our Annual Report on Form 10-K.

Adjusted EBITDA and other non-GAAP financial measures are reconciled to the most comparable measures as reported in accordance with GAAP for the periods presented in the tables attached to this release, and should be viewed in addition to, and not in lieu of, our Consolidated Financial Statements and notes thereto. In addition, PAA maintains on its website (www.plainsallamerican.com) a reconciliation of adjusted EBITDA and certain commonly used non-GAAP financial information to the most comparable GAAP measures. To access the information, investors should click on “PAA” under the “Investor Relations” tab on the home page, select the “Financial Information” tab and navigate to the “Non-GAAP Reconciliations” link.

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Forward Looking Statements

Except for the historical information contained herein, the matters discussed in this release consist of forward-looking statements that involve certain risks and uncertainties that could cause actual results or outcomes to differ materially from results or outcomes anticipated in the forward-looking statements. These risks and uncertainties include, among other things, declines in the volume of crude oil, refined product and NGL shipped, processed, purchased, stored, fractionated and/or gathered at or through the use of our assets, whether due to declines in production from existing oil and gas reserves, failure to develop or slowdown in the development of additional oil and gas reserves, whether from reduced cash flow to fund drilling or the inability to access capital, or other factors; the effects of competition; failure to implement or capitalize, or delays in implementing or capitalizing, on expansion projects; unanticipated changes in crude oil market structure, grade differentials and volatility (or lack thereof); environmental liabilities or events that are not covered by an indemnity, insurance or existing reserves; fluctuations in refinery capacity in areas supplied by our mainlines and other factors affecting demand for various grades of crude oil, refined products and natural gas and resulting changes in pricing conditions or transportation throughput requirements; the occurrence of a natural disaster, catastrophe, terrorist attack or other event, including attacks on our electronic and computer systems; tightened capital markets or other factors that increase our cost of capital or limit our ability to obtain debt or equity financing on satisfactory terms to fund additional acquisitions, expansion projects, working capital requirements and the repayment or refinancing of indebtedness; the currency exchange rate of the Canadian dollar; continued creditworthiness of, and performance by, our counterparties, including financial institutions and trading companies with which we do business; maintenance of our credit rating and ability to receive open credit from our suppliers and trade counterparties; non-utilization of our assets and facilities; weather interference with business operations or project construction, including the impact of extreme weather events or conditions; the availability of, and our ability to consummate, acquisition or combination

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opportunities; the successful integration and future performance of acquired assets or businesses and the risks associated with operating in lines of business that are distinct and separate from our historical operations; increased costs, or lack of availability, of insurance; the effectiveness of our risk management activities; shortages or cost increases of supplies, materials or labor; the impact of current and future laws, rulings, governmental regulations, accounting standards and statements and related interpretations; fluctuations in the debt and equity markets, including the price of our units at the time of vesting under our long-term incentive plans; risks related to the development and operation of our assets, including our ability to satisfy our contractual obligations to our customers; inability to recognize current revenue attributable to deficiency payments received from customers who fail to ship or move more than minimum contracted volumes until the related credits expire or are used; factors affecting demand for natural gas and natural gas storage services and rates; general economic, market or business conditions and the amplification of other risks caused by volatile financial markets, capital constraints and pervasive liquidity concerns; and other factors and uncertainties inherent in the transportation, storage, terminalling and marketing of crude oil and refined products, as well as in the storage of natural gas and the processing, transportation, fractionation, storage and marketing of natural gas liquids as discussed in the Partnerships’ filings with the Securities and Exchange Commission.

Plains All American Pipeline, L.P. is a publicly traded master limited partnership that owns and operates midstream energy infrastructure and provides logistics services for crude oil, natural gas liquids (“NGL”), natural gas and refined products. PAA owns an extensive network of pipeline transportation, terminalling, storage and gathering assets in key crude oil and NGL producing basins and transportation corridors and at major market hubs in the United States and Canada. On average, PAA handles over 4.4 million barrels per day of crude oil and NGL in its Transportation segment. PAA is headquartered in Houston, Texas.

Plains GP Holdings is a publicly traded entity that owns an interest in the general partner and incentive distribution rights of Plains All American Pipeline, L.P., one of the largest energy infrastructure and logistics companies in North America. PAGP is headquartered in Houston, Texas.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (1)

(in millions, except per unit data)

(1)             The 2014 periods have been retroactively adjusted to reflect the reclassification of the amortization of debt issuance costs from “Depreciation and amortization” to “Interest expense, net” as a result of our adoption of revised debt issuance costs guidance issued by the FASB.

ADJUSTED RESULTS

(in millions, except per unit data)

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEET DATA (1)

(in millions)

DEBT CAPITALIZATION RATIOS (1)

(in millions)

(1)             The 2014 period has been retroactively adjusted to reflect the reclassification of certain debt issuance costs from “Other long-term assets, net” to “Senior notes, net of unamortized discounts and debt issuance costs” as a result of our adoption of revised debt issuance costs guidance issued by the FASB.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

SELECTED FINANCIAL DATA BY SEGMENT

(in millions)

(1)             Includes intersegment amounts.

(2)             Field operating costs and Segment general and administrative expenses exclude equity-indexed compensation expense, which is presented separately in the table above.

(3)             Segment general and administrative expenses reflect direct costs attributable to each segment and an allocation of other expenses to the segments. The proportional allocations by segment require judgment by management and are based on the business activities that exist during each period.

(4)             Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

OPERATING DATA (1)

(1)             Average volumes are calculated as total volumes for the period (attributable to our interest) divided by the number of days or months in the period.

(2)             Area systems include volumes (attributable to our interest) from pipelines owned by unconsolidated entities.

(3)             Facilities segment total is calculated as the sum of: (i) crude oil, refined products and NGL terminalling and storage capacity; (ii) rail load and unload volumes multiplied by the number of days in the period and divided by the number of months in the period; (iii) natural gas storage working capacity divided by 6 to account for the 6:1 mcf of natural gas to crude Btu equivalent ratio and further divided by 1,000 to convert to monthly volumes in millions; and (iv) NGL fractionation volumes multiplied by the number of days in the period and divided by the number of months in the period.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

COMPUTATION OF BASIC AND DILUTED NET INCOME PER COMMON UNIT

(in millions, except per unit data)