SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 6)*

USANA Health Sciences, Inc.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

90328M107

(CUSIP Number)

Dr. Myron W. Wentz
c/o USANA Health Sciences, Inc.

3838 West Parkway Boulevard

Salt Lake City, Utah 84120

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

May 5, 2020

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

The information required on 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. 90328M107

CUSIP No. 90328M107

Explanatory Note:

This Amendment No. 6 (this “Amendment No. 6”) amends the statement on Schedule 13D filed with the Securities and Exchange Commission (the “Commission”) on May 23, 2008 by Myron W. Wentz (“Dr. Wentz”) and certain other reporting persons named therein, and amended by Amendment No. 1 thereto filed on May 22, 2018, Amendment No. 2 thereto filed on June 1, 2018, Amendment No. 3 thereto filed on August 7, 2018, Amendment No. 4 thereto filed on October 2, 2018, and Amendment No. 5 thereto filed on February 11, 2020, by Dr. Wentz and Gull Global Limited (as so amended, the “Schedule 13D”), relating to the common stock, par value $0.001 per share (“Shares” or “Common Stock”), of USANA Health Sciences, Inc., a Utah corporation. This Amendment No. 6 reflects changes to items 2, 4, 5 and 7 of the Schedule 13D. Capitalized terms used but not defined in this Amendment No. 6 shall have the meanings set forth in the Schedule 13D as amended prior to this Amendment No. 6.

Item 2(c) of the Schedule 13D is hereby amended and supplemented by adding the following information:

“As anticipated in Amendment No. 5 to the Schedule 13D, Dr. Wentz retired from the position of Board Chairman and director of the Issuer effective at the Issuer’s May 1, 2020 Annual Shareholder Meeting and transitioned to a non-voting honorary Board member and Chairman Emeritus.”

Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following information:

“The Reporting Persons sold an aggregate of 650,000 Shares between April 29, 2020 and May 5, 2020, for aggregate gross proceeds of $52,537,111.33 for liquidity purposes.”

(a)       Gull Global is the beneficial owner of 9,085,743 Shares, constituting approximately 43.24% of the outstanding Shares, based on 21,014,330 Shares outstanding as of May 1, 2020 as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Commission on May 5, 2020. Dr. Wentz is deemed to be the beneficial owner of the 9,085,743 Shares, constituting approximately 43.24% of the outstanding Shares, held by Gull Global.

(b)       The Reporting Persons share the power to vote or direct the vote of the Shares beneficially owned by them, and the power to dispose of or direct the disposition of such Shares.

(c)       The following table describes all transactions in the Common Stock that were effected by the Reporting Persons during the 60-day period prior to the date of this Amended No. 6. Except for the transactions set forth below, neither the Reporting Persons nor, to the best of the Reporting Persons’ knowledge, any person named in Item 2 of the Schedule 13D, has effected any other transactions in the Common Stock during such 60-day period.

Item 7 of the Schedule 13D is hereby amended and supplemented by adding reference to the following exhibit filed with this Amendment No. 6: 

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: May 7, 2020

Exhibit 1

JOINT FILING AGREEMENT

Each of the undersigned hereby agrees that this Amendment No. 6 to the statement on Schedule 13D is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: May 7, 2020