UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_____________________

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 16, 2018  

First Horizon National Corporation
(Exact Name of Registrant as Specified in Charter)

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

(Former name or former address, if changed since last report)

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company [   ]

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. [   ]

Item 2.02. Results of Operations and Financial Condition.

Item 7.01. Regulation FD Disclosure.

Furnished as Exhibit 99.1 is a copy of the First Horizon National Corporation ("First Horizon" or "FHN”) Third Quarter 2018 Earnings Release, which is scheduled to be released October 16, 2018.

The foregoing information is furnished pursuant to Item 2.02, "Regulation of Operations and Financial Condition," and Item 7.01, "Regulation FD Disclosure." The exhibit speaks as of the date thereof and FHN does not assume any obligation to update in the future the information therein.

Use of Non-GAAP Measures and Regulatory Measures that are not GAAP in the Exhibit

Certain measures are included in the exhibit that are “non-GAAP,” meaning (under U.S. financial reporting rules) they are not presented in accordance with generally accepted accounting principles (“GAAP”) in the U.S. and also are not codified in the U.S. banking regulations currently applicable to FHN. Although other entities may use calculation methods that differ from those used by FHN for non-GAAP measures, FHN’s management believes such measures are relevant to understanding the financial condition, capital position, and financial results of FHN and its business segments. Non-GAAP measures are reported to FHN’s management and directors through various internal reports.

Presentation of regulatory measures, some of which follow regulatory definitions rather than GAAP, provides a meaningful base for comparability to other financial institutions subject to the same regulations as FHN. Such measures are used by the various banking regulators in reviewing the performance, stability, and capital adequacy of financial institutions they regulate. Although not GAAP terms, these regulatory measures are not considered “non-GAAP” under U.S. financial reporting rules as long as their presentation conforms to regulatory standards. Regulatory measures used in the exhibit include: common equity tier 1 capital, generally defined as common equity less goodwill, other intangibles, and certain other required regulatory deductions; tier 1 capital, generally defined as the sum of core capital (including common equity and instruments that cannot be redeemed at the option of the holder) adjusted for certain items under risk based capital regulations; and risk weighted assets (“RWA”), which is a measure of total on- and off-balance sheet assets adjusted for credit and market risk, used to determine regulatory capital ratios. The non-GAAP measures presented in the exhibit include: Return on average tangible common equity (“ROTCE”), adjusted ROTCE, adjusted return on average assets ("ROA"), and adjusted earnings per share ("EPS").

Reconciliations of non-GAAP to GAAP measures and presentation of the most comparable GAAP items are presented at the end of the earnings release.

Forward-Looking Statements

This earnings release contains forward-looking statements involving significant risks and uncertainties. A number of important factors could cause actual results to differ materially from those in the forward-looking information. Those factors include general economic and financial market conditions, including expectations of and actual timing and amount of interest rate movements including the slope of the yield curve, competition, customer and investor responses to these conditions, ability to execute business plans, geopolitical developments, recent and future legislative and regulatory developments, natural disasters, and items mentioned in this earnings release and in FHN's most recent financial supplement and investor slide presentation, as well as critical accounting estimates and other factors described in FHN’s recent filings with the SEC. FHN disclaims any obligation to update any such forward-looking statements or to publicly announce the result of any revisions to any of the forward-looking statements to reflect future events or developments.

Item 9.01. Financial Statements and Exhibits.

The following exhibit is furnished pursuant to Items 2.02 and 7.01, is not to be considered "filed" under the Securities Exchange Act 1934, as amended ("Exchange Act"), and shall not be incorporated by reference into any of First Horizon's previous or future filings under the Securities Act of 1933, as amended, or the Exchange Act.  

SIGNATURE

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.