Item 5.04. Temporary Suspension of Trading Under Registrant's Employee Benefit
Plans.
On March 18, 2013, Quicksilver Resources Inc. (the "Company") sent a notice pursuant to Section 306 of the Sarbanes-Oxley Act of 2002 (the "Notice") to its directors and executive officers informing them that, due to the Company's inability to timely file its Annual Report on Form 10-K ("Annual Report"), the Company would not be able to issue Company common stock, $0.01 par value
("Company Common Stock"), pursuant to the Quicksilver Resources Inc. 401(k)
Plan, as amended (the "401(k) Plan"), commencing on March 18, 2013 and ending on the date on which the Company files its Annual Report (the "Blackout Period"), which the Company expects to be during the week of March 18, 2013. During the Blackout Period, participants in the 401(k) Plan will not be able to purchase or otherwise acquire interests in Company Common Stock or make changes in investment elections or deferral percentages in the 401(k) Plan that would result in any purchase or other acquisition of Company Common Stock. During the Blackout Period, all directors and executive officers of the Company will be prohibited from, directly or indirectly, purchasing, selling or otherwise acquiring or transferring Company Common Stock (or related securities, including derivative securities) acquired in connection with employment or service as a director or executive officer of the Company.
Stockholders or other interested parties may obtain, without charge, information regarding the Blackout Period, including information as to whether the Blackout Period has begun or ended, by contacting Francisco J. Villamar, Legal Counsel and Assistant Secretary, 801 Cherry Street, Suite 3700, Unit 19, Fort Worth, Texas 76102, or by telephone at (817) 665-5000.
A copy of the Notice is attached hereto as Exhibit 99.1 and is incorporated herein by reference.
Item 9.01. Financial Statements and Exhibits.
(d) Exhibits.

Exhibit Number Description 99.1 Notice to Directors and Executive Officers dated March 18, 2013

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