NAMES OF REPORTING PERSONS

I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

V. Gordon Clemons

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a)  ¨        (b)  ¨

SEC USE ONLY

CITIZENSHIP OR PLACE OF ORGANIZATION

United States of America

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

SOLE VOTING POWER

1,857,797

SHARED VOTING POWER

136,846

SOLE DISPOSITIVE POWER

1,857,797

SHARED DISPOSITIVE POWER

136,846

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,994,643

CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

¨

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

10.1%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

IN

If This Statement is Filed Pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), Check Whether the Person Filing is a:

(a)  ¨ Broker or dealer registered under section 15 of the Act;

(b)  ¨ Bank as defined in section 3(a)(6) of the Act;

(c)  ¨ Insurance company as defined in section 3(a)(19) of the Act;

(d)  ¨ Investment company registered under section 8 of the Investment Company Act of 1940;

(e)  ¨ An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E);

(f)  ¨ An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F);

(g)  ¨ A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G);

(h)  ¨ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(i)  ¨ A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940;

(j)  ¨ Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).

As of December 31, 2015, Mr. Clemons beneficially owns 1,769,505 shares of Common Stock of the Issuer directly and 136,846 shares of Common Stock of the Issuer indirectly resulting from the transfer without consideration of the pecuniary interest in those 136,846 shares held by the Clemons Management LLC in the form of economic units of the LLC to two irrevocable trusts each established for the adult children of the reporting person and his spouse who still retain investment and voting control over the shares. Mr. Clemons also individually holds 88,292 options which are exercisable within 60 days of December 31, 2015.

Mr. Clemons’ beneficial ownership, including all shares owned directly, indirectly, and pursuant to options which are exercisable within 60 days of December 31, 2015, represents 10.1% in the aggregate of the Issuer’s outstanding Common Stock.

Ownership of 5 Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following. ¨

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

/s/ V. Gordon Clemons