UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934*

Rocky Brands, Inc.

(Name of Issuer)

Common Stock, no par value

(Title of Class of Securities)

774515100

(CUSIP Number)

February 28, 2013

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

x Rule 13d-1(c)

¨ Rule 13d-1(d)

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 774515100

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CUSIP NO. 774515100

Rocky Brands, Inc.

39 East Canal Street

Nelsonville, Ohio 45764

This Schedule 13G is being filed on behalf of Coliseum Capital Management, LLC (“CCM”), Coliseum Capital, LLC (“CC”), Coliseum Capital Partners, L.P. (“CCP”), Coliseum Capital Partners II, L.P. (“CCP2”), Blackwell Partners, LLC (“Blackwell”), Adam Gray (“Gray”) and Christopher Shackelton (“Shackelton” and together with CCM, CC, CCP, CCP2, Blackwell and Gray, the “Reporting Persons”).

The address of the principal business and office of the Reporting Persons (other than Blackwell) is Metro Center, 1 Station Place, 7th Floor South, Stamford CT 06902. The address of the principal business and office of Blackwell is c/o DUMAC, LLC, 406 Blackwell Street, Suite 300, Durham, NC 27701.

(i) CCM is a Delaware limited liability company

(ii) CC is a Delaware limited liability company

(iii) CCP is a Delaware limited partnership

(iv) CCP2 is a Delaware limited partnership

(v) Blackwell is a Georgia limited liability company

(vi) Gray is a United States citizen

(vii) Shackelton is a United States citizen

Common Stock, no Par Value (the “Common Stock”)

774515100

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CUSIP NO. 774515100

If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:            

The information relating to the beneficial ownership of Common Stock by each of the Reporting Persons set forth in Rows 5 through 9 and Row 11 of the cover pages hereto is incorporated herein by reference.

The ownership percentage of each Reporting Person set forth in Row 11 of the cover pages hereto has been calculated based on an assumed total of 7,516,448 shares of Common Stock outstanding as of February 24, 2013, as reported in the Issuer’s Amendment No. 1 to its Annual Report for the fiscal year ended December 31, 2012 on Form 10-K/A, as filed with the Securities and Exchange Commission on March 5, 2013.

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CUSIP NO. 774515100

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 five percent of the class securities, check the following  ¨

Not applicable.

Not applicable.

The Reporting Persons may be deemed to be members of a group with respect to the Common Stock owned of record by CCP, CCP2 and Blackwell. CCP is the record owner of 235,934 shares of Common Stock, CCP2 is the record owner of 48,465, and Blackwell is the record owner of 110,396 shares of Common Stock.

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.

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CUSIP NO. 774515100

SIGNATURES

After reasonable 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.

Dated: March 11, 2013

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EXHIBIT A

Joint Filing Agreement Pursuant to Rule 13d-1

This agreement is made pursuant to Rule 13d-l(k)(1) under the Securities and Exchange Act of 1934, as amended (the “Act”) by and among the parties listed below, each referenced to herein as a “Joint Filer.” The Joint Filers agree that a statement of beneficial ownership as required by Sections 13(g) or 13(d) of the Act and the Rules thereunder may be filed on each of their behalf on Schedule 13G or Schedule 13D, as appropriate, and that said joint filing may thereafter be amended by further joint filings. The Joint Filers state that they each satisfy the requirements for making a joint filing under Rule 13d-1.

Dated: March 11, 2013