UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

Amendment No. 1

(Mark One)

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2011

Or

o 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 001-15185

First Horizon National Corporation

(Exact name of registrant as specified in its charter)

Tennessee	62-0803242
(State or other jurisdiction of incorporation or	(I.R.S. Employer Identification No.)
organization)

165 Madison Avenue
Memphis, Tennessee	38103
(Address of principal executive offices)	(Zip Code)

(Registrant’s telephone number, including area code) (901) 523-4444

(Former name, former address and former fiscal year, if changed since last report)

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. þ Yes o No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). þ Yes o No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer þ	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
		(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). o Yes þ No

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Outstanding on June 30, 2011
Common Stock, $.625 par value	263,698,516

TABLE OF CONTENTS

	Item 6 Exhibits
SIGNATURES
EXHIBIT INDEX
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

Explanatory Note

The sole purpose of this report on Form 10-Q/A (“Amendment No. 1”) to First Horizon National Corporation’s Quarterly Report on Form 10-Q for the period ended June 30, 2011 (the “June 30 Form 10-Q”), as filed with the Securities Exchange Commission on August 5, 2011, is to furnish Exhibit 101 to the June 30 Form 10-Q as required by Rule 405 of Regulation S-T. Exhibit 101 to this Amendment No. 1 furnishes the following financial and related information from the June 30 Form 10-Q formatted in eXtensible Business Reporting Language (“XBRL”): (i) Consolidated Condensed Statements of Condition (Unaudited) at June 30, 2011 and 2010 and December 31, 2010; (ii) Consolidated Condensed Statements of Income (Unaudited) for the Three and Six Months Ended June 30, 2011 and 2010; (iii) Consolidated Condensed Statements of Equity (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (iv) Consolidated Condensed Statements of Cash Flows (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (v) Notes to Consolidated Condensed Financial Statements (Unaudited).

Users of this data are advised pursuant to Rule 401 of Relation S-T that the information contained in the XBRL documents is unaudited and these are not official publicly filed financial statements of First Horizon National Corporation. No other changes have been made to the June 30 Form 10-Q. This Amendment No. 1 does not reflect subsequent events occurring after the original filing date of the June 30 Form 10-Q or modify or update any disclosures made in the June 30 Form 10-Q.

Users of the data are advised that pursuant to Rule 406T of Regulation S-T these interactive data files included in Exhibit 101 are deemed not filed or part of a registration statement or prospectus for purposes of Section 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

Item 6 Exhibits

(a) Exhibits.

Exhibit No.	Description
3.2*	Bylaws of First Horizon National Corporation, as amended and restated July 18, 2011, incorporated herein by reference to Exhibit 3.2 to the Corporation’s Current Report on Form 8-K dated July 18, 2011.
4*	Instruments defining the rights of security holders, including indentures. (1)
10.1*	Conformed copy of Retirement Agreement with Charles G. Burkett, incorporated herein by reference to Exhibit 10.1 to the Corporation’s Current Report on Form 8-K dated April 27, 2011. (2)
13*	Management’s Discussion and Analysis of Results of Operations and Financial Condition appearing in FHN’s 2010 Annual Report to shareholders, including in particular the section entitled “Risk Management” beginning on page 53 of that Report and the subsections entitled “Market Risk Management” appearing on page 54 and “Risk Management — Interest Rate Risk Management” appearing on pages 56-58 of that Report, and Note 25 to the Consolidated Financial Statements appearing on pages 191-197 of FHN’s Annual Report to shareholders, all of which materials have been incorporated herein by reference. FHN’s Management’s Discussion and Analysis of Results of Operations and Financial Condition, Consolidated Financial Statements, and related Notes appearing in FHN’s 2010 Annual Report to shareholders all were filed as part of Exhibit 13 to FHN’s annual report on Form 10-K for the year ended December 31, 2010. Portions of the Annual Report not incorporated herein by reference are deemed not to be “filed” with the Commission with this report.
31(a)*	Rule 13a-14(a) Certifications of CEO (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
31(b)*	Rule 13a-14(a) Certifications of CFO (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
32(a)*	18 USC 1350 Certifications of CEO (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002) (3)
32(b)*	18 USC 1350 Certifications of CFO (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002) (3)

Exhibit No.	Description
101**	The following financial information from First Horizon National Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, formatted in XBRL: (i) Consolidated Condensed Statements of Condition (Unaudited) at June 30, 2011 and 2010 and December 31, 2010; (ii) Consolidated Condensed Statements of Income (Unaudited) for the Three and Six Months Ended June 30, 2011 and 2010; (iii) Consolidated Condensed Statements of Equity (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (iv) Consolidated Condensed Statements of Cash Flows (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (v) Notes to Consolidated Condensed Financial Statements (Unaudited).
101.INS**	XBRL Instance Document
101.SCH**	XBRL Taxonomy Extension Schema
101.CAL**	XBRL Taxonomy Extension Calculation Linkbase
101.LAB**	XBRL Taxonomy Extension Label Linkbase
101.PRE**	XBRL Taxonomy Extension Presentation Linkbase
101.DEF**	XBRL Taxonomy Extension Definition Linkbase

*	Previously filed with or incorporated into the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2011 (filed on August 5, 2011).
**	In accordance with Regulation S-T, the interactive data file information in Exhibit No. 101 to the Quarterly Report on Form 10-Q shall be deemed “furnished” and not “filed.”
(1)	The Corporation agrees to furnish copies of the instruments, including indentures, defining the rights of the holders of the long-term debt of the Corporation and its consolidated subsidiaries to the Securities and Exchange Commission upon request.
(2)	This is a management contract or compensatory plan or arrangement required to be filed as an exhibit.
(3)	Furnished pursuant to 18 U.S.C. Section 1350; not filed as part of this Report or as a separate disclosure document.

In many agreements filed as exhibits, each party makes representations and warranties to other parties. Those representations and warranties are made only to and for the benefit of those other parties in the context of a business contract. Exceptions to such representations and warranties may be partially or fully waived by such parties, or not enforced by such parties, in their discretion. No such representation or warranty may be relied upon by any other person for any purpose.

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.

	FIRST HORIZON NATIONAL CORPORATION                        (Registrant)
DATE: August 31, 2011	By:	/s/ William C. Losch III
		Name:	William C. Losch III
		Title:	Executive Vice President and Chief Financial Officer (Duly Authorized Officer and Principal Financial Officer)

EXHIBIT INDEX

Exhibit No.	Description
3.2*	Bylaws of First Horizon National Corporation, as amended and restated July 18, 2011, incorporated herein by reference to Exhibit 3.2 to the Corporation’s Current Report on Form 8-K dated July 18, 2011.
4*	Instruments defining the rights of security holders, including indentures. (1)
10.1*	Conformed copy of Retirement Agreement with Charles G. Burkett, incorporated herein by reference to Exhibit 10.1 to the Corporation’s Current Report on Form 8-K dated April 27, 2011. (2)
13*	Management’s Discussion and Analysis of Results of Operations and Financial Condition appearing in FHN’s 2010 Annual Report to shareholders, including in particular the section entitled “Risk Management” beginning on page 53 of that Report and the subsections entitled “Market Risk Management” appearing on page 54 and “Risk Management — Interest Rate Risk Management” appearing on pages 56-58 of that Report, and Note 25 to the Consolidated Financial Statements appearing on pages 191-197 of FHN’s Annual Report to shareholders, all of which materials have been incorporated herein by reference. FHN’s Management’s Discussion and Analysis of Results of Operations and Financial Condition, Consolidated Financial Statements, and related Notes appearing in FHN’s 2010 Annual Report to shareholders all were filed as part of Exhibit 13 to FHN’s annual report on Form 10-K for the year ended December 31, 2010. Portions of the Annual Report not incorporated herein by reference are deemed not to be “filed” with the Commission with this report.
31(a)*	Rule 13a-14(a) Certifications of CEO (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
31(b)*	Rule 13a-14(a) Certifications of CFO (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
32(a)*	18 USC 1350 Certifications of CEO (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002) (3)
32(b)*	18 USC 1350 Certifications of CFO (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002) (3)
101**	The following financial information from First Horizon National Corporation’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, formatted in XBRL: (i) Consolidated Condensed Statements of Condition (Unaudited) at June 30, 2011 and 2010 and December 31, 2010; (ii) Consolidated Condensed Statements of Income (Unaudited) for the Three and Six Months Ended June 30, 2011 and 2010; (iii) Consolidated Condensed Statements of Equity (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (iv) Consolidated Condensed Statements of Cash Flows (Unaudited) for the Six Months Ended June 30, 2011 and 2010; (v) Notes to Consolidated Condensed Financial Statements (Unaudited).
101.INS**	XBRL Instance Document
101.SCH**	XBRL Taxonomy Extension Schema
101.CAL**	XBRL Taxonomy Extension Calculation Linkbase
101.LAB**	XBRL Taxonomy Extension Label Linkbase
101.PRE**	XBRL Taxonomy Extension Presentation Linkbase
101.DEF**	XBRL Taxonomy Extension Definition Linkbase

*	Previously filed with or incorporated into the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2011 (filed on August 5, 2011).
**	In accordance with Regulation S-T, the interactive data file information in Exhibit No. 101 to the Quarterly Report on Form 10-Q shall be deemed “furnished” and not “filed.”
(1)	The Corporation agrees to furnish copies of the instruments, including indentures, defining the rights of the holders of the long-term debt of the Corporation and its consolidated subsidiaries to the Securities and Exchange Commission upon request.
(2)	This is a management contract or compensatory plan or arrangement required to be filed as an exhibit.
(3)	Furnished pursuant to 18 U.S.C. Section 1350; not filed as part of this Report or as a separate disclosure document.

In many agreements filed as exhibits, each party makes representations and warranties to other parties. Those representations and warranties are made only to and for the benefit of those other parties in the context of a business contract. Exceptions to such representations and warranties may be partially or fully waived by such parties, or not enforced by such parties, in their discretion. No such representation or warranty may be relied upon by any other person for any purpose.