SC TO-I/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

(Amendment No. 2)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)

OF THE SECURITIES EXCHANGE ACT OF 1934

BANCFIRST CORPORATION

(Name of Subject Company (Issuer) and Filing Person (Offeror))

COMMON STOCK, $1.00 PAR VALUE

(Title of class of securities)

05945F103

(CUSIP number of class of securities)

David E. Rainbolt

President and Chief Executive Officer

BancFirst Corporation

101 North Broadway, Suite 1000

Oklahoma City, Oklahoma 73102

(405) 270-1086

(Name, address and telephone number of person authorized to receive notices

and communications on behalf of the person(s) filing statement)

With copies to:

Jeanette C. Timmons, Esq. Day, Edwards, Propester & Christensen, P.C. 2900 Oklahoma Tower 210 Park Avenue Oklahoma City, Oklahoma 73102 (405) 239-2121 J. Brett Pritchard, Esq. Christopher A. Pesch, Esq. Lord, Bissell & Brook, LLP 111 South Wacker Drive Chicago, Illinois 60606 (312-443-0700

CALCULATION OF FILING FEE

Transaction Valuation*	Amount of Filing Fee**
$24,275,385	$745.26

* Estimated for purposes of calculating the filing fee only. This calculation assumes the purchase of at total of 539,453 shares of common stock of BancFirst Corporation, together with the associated preferred stock purchase rights, at the actual tender offer price of $45.00 per share.

** The amount of the filing fee equals $30.70 per million of the transaction value and is estimated in accordance with Rule 0–11 under the Securities Exchange Act of 1934, as amended, and Fee Advisory No. 6 for Fiscal Year 2007 issued by the Securities and Exchange Commission.

x     Check the box if any part of the fee is offset as provided by Rule 0–11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

Amount Previously Paid:	$690.75	Filing Party:	BancFirst Corporation
Form or Registration No.:	Schedule TO-I	Date Filed:	August 3, 2007

¨ Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

¨ third-party tender offer subject to Rule 14d–1.

x issuer tender offer subject to Rule 13e–4.

¨ going-private transaction subject to Rule 13e–3.

¨ amendment to Schedule 13D under Rule 13d–2.

Check the following box if the filing is a final amendment reporting the results of the tender offer: x

INTRODUCTION

This Amendment No. 2 (“Amendment No. 2”) amends and supplements the Tender Offer Statement on Schedule TO originally filed with the Securities and Exchange Commission on August 3, 2007, as amended and supplemented by Amendment No. 1 filed with the Securities and Exchange Commission on August 8, 2007 (as amended, “Schedule TO”), by BancFirst Corporation, an Oklahoma corporation (the “Company”), pursuant to Rule 13e-4 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), in connection with the Company’s offer to purchase for cash up to 500,000 shares of its common stock, par value $1.00 per share (the “Common Stock”), including the associated preferred stock purchase rights (together with the Common Stock, the “Shares”), at a price not greater than $45.00 nor less than $39.50 per share, net to the seller in cash, less any applicable withholding taxes and without interest, upon the terms and subject to the conditions set forth set forth in the Offer to Purchase dated August 3, 2007 (“Offer to Purchase”), a copy of which is attached to the Schedule TO as Exhibit (a)(1)(A), and in the related Letter of Transmittal (the “Letter of Transmittal”), a copy of which is attached to the Schedule TO as Exhibit (a)(1)(B) (which, as amended or supplemented from time to time, together constitute the “Offer”).

This Amendment No. 2 is being filed in accordance with Rule 13e–4(c)(4) under the Exchange Act. All information in the Offer to Purchase and the related Letter of Transmittal, including all schedules and annexes thereto, which previously was incorporated by reference in response to all of the applicable items in the Schedule TO, is hereby expressly incorporated by reference into this Amendment No. 2, except that such information is hereby amended and supplemented to the extent specifically provided herein.

Item 11. Additional Information.

(b) Other Material Information.

The information set forth in Item 11(b) of the Schedule TO is hereby amended and supplemented by adding the following:

On September 10, 2007, the Company issued a press release announcing the final results of the Offer, which expired at 5:00 p.m., New York City time, on Tuesday, September 4, 2007. A copy of the press release is filed as Exhibit (a)(5)(B) to this Schedule TO and is incorporated herein by reference.

12. Exhibits.

Item 12 of the Schedule TO is hereby amended and supplemented by adding the following exhibit:

(a)(5)(B)*** Press Release issued by BancFirst Corporation on September 10, 2007.

*** Filed herewith.

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SIGNATURE

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

	BANCFIRST CORPORATION,
Date: September 11, 2007	By:	/s/ Joe T. Shockley, Jr.
		Joe T. Shockley, Jr.
		Executive Vice President and Chief Financial Officer

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EXHIBIT INDEX

Exhibit Number	Description
(a)(1)(A)*	Offer to Purchase, dated August 3, 2007.
(a)(1)(B)*	Letter of Transmittal (including Guidelines of the Internal Revenue Service for Certification of Taxpayer Identification Number on Substitute Form W-9).
(a)(1)(C)*	Notice of Guaranteed Delivery.
(a)(1)(D)*	Letter to Shareholders, dated August 3, 2007.
(a)(1)(E)*	Letter to Brokers, Dealers, Banks, Trust Companies and Other Nominees.
(a)(1)(F)*	Letter to Clients for use by Brokers, Dealers, Banks, Trust Companies and Other Nominees.
(a)(1)(G)*	Letter to Participants in The BancFirst Corporation Employee Stock Ownership Plan.
(a)(1)(H)*	Letter to Participants in The BancFirst Corporation Thrift Plan.
(a)(1)(I)**	Letter to Holders of Vested Options.
(a)(5)(A)	Press Release issued by BancFirst Corporation on August 1, 2007 (filed as Exhibit 99.1 to the Company’s 8-K dated August 1, 2007 and filed August 2, 2007 and incorporated herein by reference).
(a)(5)(B)***	Press Release issued by BancFirst Corporation on September 10, 2007.
(d)(1)	Rights Agreement, dated as of February 25, 1999, between BancFirst Corporation and BancFirst, as Rights Agent, including as Exhibit A the form of Certificate of Designations of the Company setting forth the terms of the Preferred Stock, as Exhibit B the form of Right Certificate and as Exhibit C the form of Summary of Rights Agreement (filed as Exhibit 1 to the Company’s 8-K dated February 25, 1999 and incorporated herein by reference).
(d)(2)	Eighth Amended and Restated BancFirst Corporation Stock Option Plan (filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the Quarter Ended September 30, 2006 and incorporated herein by reference).
(d)(3)	Amended and Restated BancFirst Corporation Employee Stock Ownership and Thrift Plan, as amended by amendments dated September 19, 1992, November 21, 2002 and December 18, 2003 (filed as Exhibit 10.2 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2004 and incorporated herein by reference).
(d)(4)	1988 Incentive Stock Option Plan of Security Corporation as assumed by BancFirst Corporation (filed as Exhibit 4.1 to the Company’s Registration Statement on Form S-8, File No. 333-65129 and incorporated herein by reference).
(d)(5)	1993 Incentive Stock Option Plan of Security Corporation as assumed by BancFirst Corporation (filed as Exhibit 4.2 to the Company’s Registration Statement on Form S-8, File No. 333-65129 and incorporated herein by reference).
(d)(6)	1995 Non-Employee Director Stock Plan of AmQuest Financial Corp. as assumed by BancFirst Corporation (filed as Exhibit 4.3 to the Company’s Registration Statement on Form S-8, File No. 333-65129 and incorporated herein by reference).
(d)(7)	BancFirst Corporation Non-Employee Directors’ Stock Option Plan (filed as Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2006 and incorporated herein by reference).
(d)(8)	BancFirst Corporation Directors’ Deferred Stock Compensation Plan (filed as Exhibit 10.7 to the Company’s Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2006 and incorporated herein by reference).
(g)	Not applicable.
(h)	Not applicable.

* Previously filed on Schedule TO on August 3, 2007.

** Previously filed on Amendment No. 1 to Schedule TO on August 8, 2007.

*** Filed herewith.

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EX-99.(A)(5)(B)

Exhibit (a)(5)(B)

BancFirst Corporation

101 NORTH BROADWAY

OKLAHOMA CITY, OKLAHOMA 73102

PRESS RELEASE

For Immediate release: Monday, September 10, 2007

For further information call Joe T. Shockley, Jr. Executive Vice President

and Chief Financial Officer at (405) 270-1003

BANCFIRST CORPORATION ANNOUNCES FINAL RESULTS OF TENDER OFFER,

INCREASES QUARTERLY DIVIDEND,

AND JOINS THE NASDAQ FINANCIAL-100 INDEX

Oklahoma City, OK - BancFirst Corporation (NASDAQ GS: BANF) today announced the final results of its modified “Dutch Auction” tender offer, which expired at 5:00 P.M., Eastern Time, on Tuesday, September 4, 2007.

BancFirst Corporation has accepted for purchase 539,453 shares of its common stock at a price per share of $45.00, including all “odd lots” properly tendered and not withdrawn. The tender offer was for up to 500,000 shares, with an option to purchase up to an additional 2% of the outstanding shares. At expiration, 539,453 shares were validly tendered and not withdrawn, and BancFirst exercised its option to purchase the additional shares. These shares represent approximately 3.4% of BancFirst Corporation’s currently outstanding shares. Payment for the tendered shares is expected to be made promptly.

Following the completion of the tender offer, BancFirst Corporation will have approximately 15,185,083 shares of Common Stock outstanding.

Friedman, Billings, Ramsey & Co., Inc. served as the dealer manager for the tender offer. MacKenzie Partners, Inc. served as the information agent and American Stock Transfer and Trust Company served as the depositary. Stockholders and investors who have questions or need information about the tender offer may call MacKenzie Partners, Inc. toll-fee at (800) 322-2885.

Separately, BancFirst Corporation announced that its Board of Directors approved a $0.20 per share cash dividend on its common stock. The dividend is payable October 15, 2007 to shareholders of record on September 30, 2007. This is an increase of 11.1% over the quarterly dividend that was paid in each of the previous four quarters. Since going public in 1993, the company has increased the dividend by more than 10% each year.

Also, NASDAQ informed BancFirst Corporation that it was included in the NASDAQ Financial-100 index effective September 4, 2007. The NASDAQ Financial-100 index includes 100 of the largest domestic and international securities listed on The NASDAQ Market in banking, insurance and financial services, based on market capitalization.

About the Company

BancFirst Corporation is a financial services holding company and the parent company of BancFirst, Oklahoma’s largest state-chartered bank with $3.6 billion in total assets and 86 banking locations serving 44 communities across Oklahoma.

Safe Harbor Statement

The Company may make forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 with respect to earnings, credit

quality, corporate objectives, interest rates and other financial and business matters. Forward-looking statements include estimates and give management’s current expectations or forecasts of future events. The Company cautions readers that these forward-looking statements are subject to numerous assumptions, risks and uncertainties, including economic conditions, the performance of financial markets and interest rates; legislative and regulatory actions and reforms; competition; as well as other factors, all of which change over time. Actual results may differ materially from forward-looking statements.