Western Gas Partners, LP (NYSE:WES) today announced a registered underwritten public offering of 5,000,000 common units representing limited partner interests. Western Gas Partners (the “Partnership”) will grant the underwriters a 30-day option to purchase up to 750,000 additional common units. The Partnership expects to use the net proceeds from the offering, including any net proceeds received from an exercise of the underwriters’ option to purchase additional common units, for general partnership purposes, including the funding of capital expenditures. Pending the use of proceeds for other purposes, the Partnership may apply some or all of the net proceeds to reduce outstanding borrowings under its revolving credit facility. Barclays, Citigroup, Deutsche Bank Securities, Morgan Stanley and RBC Capital Markets are acting as joint book-running managers for the offering. The offering will be made only by means of a prospectus and related prospectus supplement, copies of which may be obtained from Barclays, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, or by calling (888) 603-5847 or by emailing Barclaysprospectus@broadridge.com; Citigroup, Brooklyn Army Terminal, 140 58th Street, 8th Floor, Brooklyn, New York 11220, Attention: Prospectus Dept., or by calling (877) 858-5407 or by emailing BATProspectusdept@citi.com; Deutsche Bank Securities, Harborside Financial Center, 100 Plaza One, Jersey City, New Jersey 07311, Attention: Prospectus Dept., or by calling (800) 503-4611 or by emailing firstname.lastname@example.org; Morgan Stanley, 180 Varick Street, 2nd Floor, New York, New York 10014, Attention: Prospectus Dept., or by calling (866) 718-1649 or by emailing email@example.com; or RBC Capital Markets, 3 World Financial Center, 200 Vesey Street, 8 th Floor, New York, New York 10281, Attention: Equity Syndicate, or by calling (877) 822-4089. An electronic copy of the prospectus and prospectus supplement is available from the U.S. Securities and Exchange Commission’s website at www.sec.gov. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of, these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. The offer is being made only through the prospectus as supplemented, which is part of a shelf registration statement that became effective on May 9, 2011.