<Page> UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q/A AMENDMENT NO. 1 /X/ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: JUNE 30, 2001. / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to --------------------- ---------------- Commission file number: 001-13171 EVERGREEN RESOURCES, INC. (Exact name of registrant as specified in its charter) COLORADO 84-0834147 - --------------------------------- ------------------------------- (State or Other Jurisdiction (I.R.S. Employer Identification of Incorporation or Organization) Number) 1401 17TH STREET SUITE 1200 DENVER, COLORADO 80202 - --------------------------------- ------------------------------- (Address of Principal Executive (Zip Code) Offices) Registrant's Telephone Number, Including Area Code: (303) 298-8100 Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. /X/ YES / / NO As of August 6, 2001, 18,537,038 shares of the Registrant's Common Stock, no par value, were outstanding. <Page> EVERGREEN RESOURCES, INC. INDEX <Table> <Caption> Page Number ------ PART II. OTHER INFORMATION................................................ 3 </Table> <Page> The Quarterly Report of Form 10-Q for the quarterly period ended June 30, 2001 of Evergreen Resources, Inc. ("the Company") is amended by this Form 10-Q/A, Amendment No. 1 to such report, by replacing the text of Part II, Item 4, Submission of Matters to a Vote of Security Holders, with the material set forth below, which contains corrected voting results for the matters considered at the Company's 2001 annual meeting of shareholders held on May 2, 2001. <Page> PART II. OTHER INFORMATION ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. The following summarizes the votes at the Company's Annual Meeting of Shareholders held on May 2, 2001: ELECTION OF DIRECTORS - with terms expiring at the Annual Shareholders Meeting in 2004: <Table> <Caption> NAME FOR WITHHELD ---- --- -------- Dennis R. Carlton 15,211,284 50,977 Mark S. Sexton 13,637,380 1,624,881 Arthur L. Smith 15,209,023 53,238 </Table> RATIFICATION OF THE APPOINTMENT OF BDO SEIDMAN, LLP AS INDEPENDENT AUDITORS FOR THE YEAR ENDING DECEMBER 31, 2001 <Table> <Caption> FOR AGAINST ABSTAIN --- ------- ------- 15,192,515 57,786 11,960 </Table> <Page> SIGNATURES 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 thereunto duly authorized. EVERGREEN RESOURCES, INC. (Registrant) DATE: September 4, 2001 By: /s/ Kevin R. Collins ------------------------------- Kevin R. Collins VP - Finance, Chief Financial Officer (Principal Financial and Accounting Officer)