SECURITIES AND EXCHANGE COMMISSION

					WASHINGTON, DC   20549

					

				
			
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FORM 8-K

					

				
			
CURRENT REPORT

				PURSUANT TO SECTION 13 OR 15(d) OF THE

				SECURITIES EXCHANGE ACT OF 1934

					

					

				
			
Date of report (Date of earliest event reported) - October 18, 2006

					

					

				
			
FIRST HORIZON NATIONAL CORPORATION

				(Exact Name of Registrant as Specified in Charter)

					

					

				
			
				
					TENNESSEE
					001-15185
					62-0803242
				
				
					(State or Other Jurisdiction
					(Commission
					(IRS Employer
				
				
					of Incorporation)
					File Number)
					 Identification No.)
				
			
			


					

				
			
165 MADISON AVENUE

				MEMPHIS, TENNESSEE    38103

				(Address of Principal Executive Office)  (Zip Code)

					

					

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

				
		
    

				
	
	

		
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

				

			
		
			
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						Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
				
			
			
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						Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
				
			
			
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						Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
				
			
			
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						Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
				
			
		
	
	

			

		
	

			
ITEM 7.01. REGULATION FD DISCLOSURE

					

				
			
Furnished as Exhibit 99.1 is a copy of First Horizon National Corporation Third Quarter 2006 Financial Supplement which is scheduled to be released October 18, 2006.

					

					

				
			
ITEM 9.01. Financial Statements and Exhibits

					

				
			
(c)  Exhibits

					

				
			
The following exhibit is furnished pursuant to Item 7.01, is not to be considered "filed" under the Securities Exchange Act of 1934, as amended ("Exchange Act"), and shall not be incorporated by reference into any of First Horizon National Corporation's ("Corporation") previous or future filings under the Securities Act of 1933, as amended, or the Exchange Act.

					

					

				
			
				
					Exhibit #
					Description
				
				
					99.1
					First Horizon National Corporation Third Quarter 2006 Financial Supplement
				
			
			


					

					

					

				
		
		

			
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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 hereunto duly authorized.

					

					

				
		
		

			
				
					
					
					
						
FIRST HORIZON NATIONAL CORPORATION

									

								
					
				
				
					Date: October 18, 2006
					By:
					/s/ Marlin L. Mosby III

								Name: Marlin L. Mosby III

								Title: Executive Vice President and Chief Financial Officer
				
			
			


					

				
			
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Exhibit Index

				

					

				
		
		

			
The following exhibit is furnished pursuant to Item 7.01 is not to be considered "filed" under the Exchange Act, and shall not be incorporated by reference into any of the Corporation's previous or future filings under the Securities Act of 1933, as amended, or the Exchange Act.

					

					

				
			

			
				
					Exhibit #
					Description
				
				
					99.1
					First Horizon National Corporation Third Quarter 2006 Financial Supplement
				
			
			


					

					

				
		
		

			
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