Form 8-K

8-K — MANNATECH INC

Accession: 0001437749-26-010932

Filed: 2026-04-02

Period: 2026-04-01

CIK: 0001056358

SIC: 2833 (MEDICINAL CHEMICALS & BOTANICAL PRODUCTS)

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — mtex20260331_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (ex_940139.htm)

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0001056358

2026-04-01

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): April 1, 2026

MANNATECH, INCORPORATED

(Exact Name of Registrant as Specified in its Charter)

Texas

000-24657

75-2508900

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

1410 Lakeside Parkway, Suite 200

Flower Mound, Texas 75028

(Address of Principal Executive Offices, including Zip Code)

Registrant’s Telephone Number, including Area Code: (972) 471-7400

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

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):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities Registered Pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, par value $0.0001 per share

MTEX

The Nasdaq Stock Market LLC

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

☐ 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 8.01 Other Events; Filing of Form 12b-25 (Notification of Late Filing) for Form 10-K

On April 1, 2026, Mannatech, Incorporated (the “Company”) filed a Notification of Late Filing on Form 12b-25 (the “Form 12b-25”) with the Securities and Exchange Commission (the “SEC”) relating to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (the “Form 10-K”).

The Company was unable to file the Form 10-K within the prescribed time period without unreasonable effort or expense. As disclosed in the Form 12b-25, because our independent auditor discussed with us the possibility of a going concern issue, management needs more time to assess the repercussions and any necessary remediation efforts. That assessment includes discussions with third-party tax advisors and review of a cost-reduction plan.

The Company currently expects to file the Form 10-K within the fifteen-day extension period provided under Rule 12b-25 under the Securities Exchange Act of 1934, as amended.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits.

Exhibit Number

Description

99.1*

Press Release, dated April 1, 2026, titled Mannatech Announces Notification of Late Filing

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

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.

Date: April 1, 2026

MANNATECH, INCORPORATED

By:

/s/ Landen Fredrick

Landen Fredrick

Chief Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: ex_940139.htm · Sequence: 2

ex_940139.htm

Exhibit 99.1

Mannatech Announces Notification of Late Filing

FLOWER MOUND, Texas – April 1, 2026 - Mannatech, Incorporated (NASDAQ: MTEX), (“Mannatech” or “the Company”) announced today that it has filed a Form 12b-25, Notification of Late Filing, with the U.S. Securities and Exchange Commission with regard to its annual report on Form 10-K (the “2025 Form 10-K”) for the fiscal year ended December 31, 2025. Form 12b-25 allows the Company an automatic extension of 15 additional calendar days to file the 2025 Form 10-K, which is due on March 31, 2026.

The Company expects to file the 2025 Form 10-K as soon as practicable by April 15, 2026, in accordance with Rule 12b-25. The 12b-25 filing is available on the Company’s website under ir.Mannatech.com.

About Mannatech:

Mannatech is a leading global health and wellness company committed to empowering everyone to live their best life through cutting-edge, science-backed nutritional products, patented technology, and a rewarding business opportunity. With operations in more than 25 markets†, Mannatech helps people to live healthier, more fulfilling lives while making a positive social impact in the world. Individuals interested in Mannatech's products or in exploring its business opportunity can learn more at Mannatech.com.

†Mannatech operates in China under a cross-border e-commerce platform that is separate from its network marketing model.

Please Note: This release contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. These forward-looking statements generally can be identified by use of phrases or terminology such as “may,” “will,” “should,” "hope," “could,” “would,” “expects,” “plans,” “intends,” “anticipates,” “believes,” “estimates,” “approximates,” “predicts,” “projects,” “potential,” and “continues” or other similar words or the negative of such terminology. Similarly, descriptions of Mannatech’s objectives, strategies, plans, goals, or targets contained herein are also considered forward-looking statements. Mannatech believes this release should be read in conjunction with all of its filings with the United States Securities and Exchange Commission and cautions its readers that these forward-looking statements are subject to certain events, risks, uncertainties, and other factors. Some of these factors include, among others, the impact of COVID-19 on Mannatech's business, Mannatech’s inability to attract and retain associates and members, increases in competition, litigation, regulatory changes, and its planned growth into new international markets. Although Mannatech believes that the expectations, statements, and assumptions reflected in these forward-looking statements are reasonable, it cautions readers to always consider all of the risk factors and any other cautionary statements carefully in evaluating each forward-looking statement in this release, as well as those set forth in its latest Annual Report on Form 10-K, and other filings filed with the United States Securities and Exchange Commission, including its current reports on Form 8-K. All of the forward-looking statements contained herein speak only as of the date of this release.

Contact Information:

Erin K. Barta

General Counsel and Corporate Secretary

972.471.6512 or ir@mannatech.com

www.mannatech.com

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