8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 9, 2007

ULTRA PETROLEUM CORP.

(Exact name of registrant as specified in its charter)

Yukon Territory, Canada	0-29370	N/A
(State or other jurisdiction	(Commission File Number)	(I.R.S. Employer
of incorporation)		Identification No.)

363 N. Sam Houston Parkway East

Suite 1200

Houston, Texas 77060

(Address of principal executive offices, including zip code)

Registrant's telephone number, including area code: (281) 876-0120

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing.

On July 9, 2007, Ultra Petroleum Corp. (the “Company”) informed the American Stock Exchange of the Company’s intention to list its common stock on the New York Stock Exchange and to simultaneously delist its common stock from the American Stock Exchange. Subject to approval by the New York Stock Exchange of the Company’s listing application, it is expected that the Company’s common stock will commence trading on the NYSE and cease trading on the American Stock Exchange on August 3, 2007. A copy of the new release announcing the transfer of listing is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The information presented in this Item 3.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as expressly set forth in such filing.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

99.1 News Release issued by Ultra Petroleum Corp. dated July 13, 2007.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ULTRA PETROLEUM CORP.
July 13, 2007	By:	/s/ Michael D. Watford
		Name: Michael D. Watford
		Title: Chairman, President and Chief Executive Officer

EXHIBIT INDEX

Exhibit No.  Description

99.1 News Release dated July 13, 2007

EX-99.1

NEWS RELEASE

FOR IMMEDIATE RELEASE

ULTRA PETROLEUM ANNOUNCES NEW YORK STOCK EXCHANGE LISTING

HOUSTON, Texas - July 13, 2007 - Ultra Petroleum Corp. (AMEX: UPL) today reported that it has filed an application to list its common stock on the New York Stock Exchange under the symbol “UPL”. Pending approval of the application, it is expected that the first day of trading on the New York Stock Exchange will be August 3, 2007. The last day of trading of Ultra Petroleum’s common stock on AMEX is expected to be August 2, 2007.

“We believe the move will benefit our shareholders through increased visibility and decreased volatility,” stated Michael D. Watford, Chairman, President and Chief Executive Officer. “We join the ranks of many other mid and large-cap oil and gas companies currently trading on the NYSE with this move. We have had a successful history with our specialists and the American Stock Exchange and are looking forward to our new relationship with the NYSE.”

About Ultra Petroleum

Ultra Petroleum is an independent, exploration and production company focused on its core properties in the Green River Basin of southwestern Wyoming: the Pinedale and Jonah Fields. The company produces oil in the shallow waters of Bohai Bay, China and is in the early exploration stages in the Appalachian Basin in Pennsylvania. Ultra Petroleum is listed on the American Stock Exchange under the symbol “UPL” with 152,167,702 shares outstanding as of June 30, 2007.

This release can be found at http://www.ultrapetroleum.com

This news release includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The opinions, forecasts, projections or other statements, other than statements of historical fact, are forward-looking statements. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will prove to have been correct. Certain risks and uncertainties inherent in the Company’s businesses are set forth in our filings with the SEC, particularly in the section entitled “Risk Factors” included in our Annual Report on Form 10-K for our most recent fiscal year and from time to time in other filings made by us with the SEC.

For further information contact:

Kelly L. Whitley

Manager Investor Relations

Phone: 281-876-0120 Extension 302

Email: info@ultrapetroleum.com

Website: www.ultrapetroleum.com

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