=============================================================================== UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 0-8403 ------------------------ COMMISSION FILE NUMBER NOTIFICATION OF LATE FILING (Check One): [ ] Form 10-K [ ] Form 20-F [ ] Form 11-K [x] Form 10-Q [ ] Form N-SAR For Period Ended: September 30, 1999 [ ] Transition Report on Form 10-K [ ] Transition Report on Form 20-F [ ] Transition Report on Form 11-K [ ] Transition Report on Form 10-Q [ ] Transition Report on Form N-SAR For the Transition Period Ended: ________________________ +------------------------------------------------------------------------------+ | Read Instruction (on back page) Before Preparing Form. Please Print or Type | | Nothing in this form shall be construed to imply that the Commission has | | verified any information contained herein. | +------------------------------------------------------------------------------+ If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates: - -------------------------------------------------------------------------------- PART I - REGISTRANT INFORMATION SOUTHERN MINERAL CORPORATION - -------------------------------------------------------------------------------- Full Name of Registrant - -------------------------------------------------------------------------------- Former Name if Applicable 1201 LOUISIANA STREET, SUITE 3350 - -------------------------------------------------------------------------------- Address of Principal Executive Office (Street and Number) HOUSTON, TEXAS 77002 - -------------------------------------------------------------------------------- City, State and Zip Code PART II - RULES 12b-25(b) AND (c) If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate) | (a) The reasons described in reasonable detail in Part III of this form | could not be eliminated without unreasonable effort or expense; | (b) The subject annual report, semi-annual report, transition report on | Form 10-K, Form 20-F, 11-K or Form N-SAR, or portion thereof, will be | filed on or before the fifteenth calendar day following the [X] | prescribed due date; or the subject quarterly report of transition | report on Form 10-Q, or portion thereof will be filed on or before | the fifth calendar day following the prescribed due date; and | (c) The accountant's statement or other exhibit required by Rule | 12b-25(c) has been attached if applicable. PART III - NARRATIVE State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q, N-SAR, or the transition report or portion thereof, could not be filed within the prescribed time period. On October 29, 1999, the registrant filed a petition for relief under Chapter 11 of the United States Bankruptcy Code. Due to the disruption in the registrant's normal business operations caused by the administrative burden relating to such bankruptcy filing, the registrant is unable to timely prepare its quarterly financial statements and other related disclosure without unreasonable effort or expense. PART IV - OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification. MICHAEL E. LUTTRELL (713) 658-9444 ---------------------------- -------------- ------------------------- (Name) (Area Code) (Telephone Number) (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s). [X] Yes [ ] No --------------------------------------------------------------------------- (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? [X] Yes [ ] No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. See Annex I ================================================================================ SOUTHERN MINERAL CORPORATION ----------------------------------------------------------- (Name of Registrant as Specified in Charter) has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized. Date November 16, 1999 By /s/ Michael E. Luttrell ------------------------------ -------------------------------------- Michael E. Luttrell Vice President-Finance and Chief Financial Officer ANNEX I During the quarterly period ended September 30, 1999, the Company (i) sold its Brushy Creek Field and Texas Garden Field interest for a gain of approximately $7.1 million and (ii) expensed approximately $1.3 million of costs associated with a proposed restructuring of its 6.875% Convertible Subordinated Debentures due 2007 that was abandoned during such period.