Exhibit 99.1

The following is an excerpt from the Registration Statement of Western Gas Equity Partners, LP filed on December 3, 2012. Throughout this excerpt, when the terms “WGP,” “we,” “us,” “our” and “Western Gas Equity Partners, LP,” are used, they refer to Western Gas Equity Partners, LP in its individual capacity or to Western Gas Equity Partners, LP and its consolidated subsidiaries collectively, as the context requires. As used herein, (i) “our general partner” refers to Western Gas Equity Holdings, LLC, the general partner of Western Gas Equity Partners, LP; (ii) “WES” refers to Western Gas Partners, LP in its individual capacity or to Western Gas Partners, LP and its subsidiaries collectively, as the context requires; (iii) “WES GP” refers to Western Gas Holdings, LLC, a wholly owned subsidiary of Western Gas Equity Partners, LP and the general partner of Western Gas Partners, LP; (iv) “Anadarko” refers to Anadarko Petroleum Corporation and its subsidiaries and affiliates, other than Western Gas Equity Partners, LP, its general partner, WES GP, WES, and its subsidiaries as of the closing date of the initial public offering of Western Gas Equity Partners, LP; and (v) “Anadarko Petroleum Corporation” refers to Anadarko Petroleum Corporation excluding its subsidiaries and affiliates.

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USE OF PROCEEDS

We expect to receive net proceeds of approximately $281.5 million from the sale of our common units assuming an initial public offering price of $20.00 per common unit (the midpoint of the price range set forth on the cover page of this prospectus), after deducting underwriting discounts, the structuring fee and offering expenses. We will use the net proceeds from this offering as follows:

We will use any net proceeds from the exercise of the underwriters’ over-allotment option to purchase from WES additional common units and a corresponding number of general partner units.

Please read “Prospectus Summary—Our Structure” for a discussion of the impact on our equity capitalization of a change in the public offering price of our common units or the number of common units sold in this offering.

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Estimated Minimum Necessary WES Adjusted EBITDA to Enable Us to Pay the Aggregate Annualized Initial Quarterly Distribution for the Year Ending December 31, 2013

In order to have sufficient available cash to pay the aggregate annualized initial quarterly distribution on all of our outstanding common units for the year ending December 31, 2013, we estimate that we must receive cash distributions from WES of at least $140.6 million. In order for WES to pay us cash distributions that would permit us to pay the full initial quarterly distribution on all of our outstanding common units for the year ending December 31, 2013 (including the additional common units that we would issue if the offering price or size were increased to yield aggregate gross offering proceeds of approximately $435 million), we estimate that WES must generate Adjusted EBITDA of at least $340.0 million. WES defines Adjusted EBITDA as net income (loss) attributable to Western Gas Partners, LP, plus distributions from equity investees, non-cash equity–based compensation expense, expense in excess of the expense reimbursement cap provided in the WES omnibus agreement (if applicable), interest expense, income tax expense, depreciation, amortization and impairments, and other expense, less income from equity investments, interest income, income tax benefit, and other income. Adjusted EBITDA should not be considered an alternative to net income, net cash provided by operating activities, or any other measure of financial performance calculated in accordance with generally accepted accounting principles in the United States (“GAAP”).

The table below is intended to be an indicator or benchmark of the amount management considers to be the minimum amount of WES Adjusted EBITDA necessary for WES to pay distributions to its partners, including us, which will enable us to have sufficient available cash to pay the initial quarterly distribution of $0.165 per common unit per quarter (or $0.660 per common unit on an annualized basis) on our common units for the year ending December 31, 2013 (including the additional common units that we would issue if the offering price or size were increased to yield aggregate gross offering proceeds of approximately $435 million). The baseline estimate of WES Adjusted EBITDA should not be viewed as management’s full projection of WES’s expected operating results and financial performance for the year ending December 31, 2013. Similarly, such baseline estimate is not intended to modify or replace the guidance that WES provides on an annual basis. Our management believes that WES’s actual Adjusted EBITDA during the year ending December 31, 2013 will exceed the amount presented below.

We believe that our partnership interests in WES, including the incentive distribution rights, will generate sufficient cash flow to enable us to pay the aggregate annualized initial quarterly distribution on all of our common units for the year ending December 31, 2013. You should read the footnotes to the table below for a discussion of the material assumptions underlying this belief. Our belief is based on several assumptions and reflects our judgment of conditions we expect to exist and the course of action we expect WES to take. While we believe that these assumptions are reasonable in light of our current expectations regarding future events, the assumptions underlying our belief are inherently uncertain and are subject to significant business, economic, regulatory and competitive risks and uncertainties that could cause actual results to differ materially from those we anticipate. If WES’s expected results of operations are not realized, the amount of cash that WES distributes to us could be substantially less than that currently expected and could, therefore, be insufficient to permit us to pay the initial quarterly distribution, or any distribution, on our common units, which could cause the market price of our common units to decline materially. Consequently, our belief that we will have sufficient available cash to pay the initial quarterly distribution on all of our common units for the year ending December 31, 2013 should not be regarded as a representation by us, the underwriters or any other person that we will declare and pay such a distribution.

We have prepared the table below and related disclosure to substantiate our belief that we will have sufficient available cash to pay the aggregate annualized initial quarterly distribution on all of our common units for the year ending December 31, 2013. The statements made below are forward-looking statements and should be read together with the historical and pro forma financial statements and the accompanying notes included elsewhere in this prospectus and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The financial information below was not prepared with a view toward complying with the

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guidelines established by the American Institute of Certified Public Accountants with respect to prospective financial information, but, in the view of our management, was prepared on a reasonable basis, reflects the best currently available estimates and judgments, and presents, to the best of management’s knowledge and belief, the assumptions on which we base our belief that we can generate sufficient available cash to pay the aggregate annualized initial quarterly distribution on all of our common units for the year ending December 31, 2013. However, this information is not fact and should not be relied upon as being necessarily indicative of future results, and we undertake no obligation to release publicly the results of any future revisions we may make to this financial information to reflect events or circumstances after the date of this prospectus. As a result, readers of this prospectus are cautioned not to place undue reliance on this financial information.

Neither our independent auditors nor any other independent accountants have compiled, examined or performed any procedures with respect to the prospective financial information contained herein, nor have they expressed any opinion or any other form of assurance on such information or its achievability, and they assume no responsibility for, and disclaim any association with, the prospective financial information.

When reading this section, you should keep in mind the risk factors and other cautionary statements under the heading “Risk Factors” in this prospectus. Any of these factors or the other risks discussed in this prospectus could cause our financial condition and consolidated results of operations to vary significantly from those set forth in the table below.

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Western Gas Equity Partners, LP

Estimated Minimum Necessary WES Adjusted EBITDA

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This table is intended to be an indicator or benchmark of the amount management considers to be the lowest amount of WES Adjusted EBITDA necessary for WES to pay distributions to its partners, including us, which will enable us to have sufficient available cash to pay the initial quarterly distribution of $0.165 per common unit per quarter (or $0.660 per common unit on an annualized basis) on our common units for the year ending December 31, 2013 (including the additional common units that we would issue if the offering price or size were increased to yield aggregate gross offering proceeds of approximately $435 million). The baseline estimate of WES Adjusted EBITDA should not be viewed as management’s full projection of WES’s expected operating results and financial performance for the year ending December 31, 2013. Similarly, such baseline estimate is not intended to modify or replace the guidance that WES provides on an annual basis. As discussed in more detail in footnote 8 below, our management believes that WES’s Adjusted EBITDA during the year ending December 31, 2013 will exceed the amount presented below.

Our calculation of estimated throughput presented below represents our estimate of the minimum throughput that we believe necessary for WES to generate sufficient Adjusted EBITDA to enable us to pay our annualized initial quarterly distribution on all of our common units if the aggregate offering size increases as described above. We calculated this estimated minimum throughput as follows:

The Estimated Minimum Necessary WES Adjusted EBITDA is based on a number of significant assumptions, including the following:

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We cannot assure you that any of the assumptions summarized above, or any other assumptions upon which our Estimated Minimum Necessary WES Adjusted EBITDA is based, will prove to be correct. If the assumptions are incorrect or not achieved, we may not have sufficient available cash to make the contemplated distributions.

(i) approximately $2.2 million of interest expense, net of capitalized interest, related to borrowings of $43.4 million under the WES RCF to fund expansion capital expenditures and the additional interest associated with the annual commitment fee of approximately 0.25% on the unused borrowing capacity under the WES RCF. We assume that WES will finance a substantial portion of its expansion capital expenditures through borrowings under the WES RCF. We have assumed that the weighted-average interest rate on the WES RCF during the year ending December 31, 2013 will not exceed 1.74%;

(ii) approximately $26.8 million of interest expense associated with the 2022 Notes; and

(iii) approximately $26.9 million of interest expense associated with the 2021 Notes.

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As noted above, our estimated minimum distributions from WES are based on an assumption that WES will pay a distribution of $0.52 per unit with respect to each quarter during the year ending December 31, 2013. We believe that this minimum distribution from WES is achievable because, in connection with its third quarter earnings announcement, WES:

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We further believe that it is reasonable to expect WES to achieve the financial performance necessary to generate the estimated minimum necessary Adjusted EBITDA and deliver the expected distribution growth due to the following:

If the offering price or size is increased, we will use the resulting additional proceeds to purchase additional WES common and general partner units. We believe the excess of estimated available cash of Western Gas Partners, LP over total distributions of Western Gas Partners, LP presented in the table above would equal the amount needed to enable WES to distribute sufficient additional cash to us to permit us to pay the initial quarterly distribution on the common units we would issue in this offering if the offering price or size were increased to yield aggregate gross offering proceeds of approximately $435 million.

If we receive proceeds in this offering of less than the assumed net proceeds of $281.5 million, and as a result we purchase fewer WES common and general partner units, Anadarko will agree to forgo certain distributions (subject to future reimbursement) for the benefit of the other holders of our common units. Please read “Prospectus Summary—Our Structure.”

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