Announces Restructuring and Private Placement

Washington, DC – May 30, 2018 – Avant Diagnostics, Inc. (“Avant”) (OTC: AVDX), an
oncology-focused healthcare data-generating solutions company commercializing the proprietary
Theralink® phospho-protein biomarker platform across multiple cancers, today announced that it
has entered into securities purchase agreements with accredited investors pursuant to which the
Company sold 650,000 shares of the Company’s newly designated Series A Preferred Stock (the
“Series A Preferred Stock”) for aggregate gross proceeds of $650,000. The Series A Preferred
Stock will control a majority of the voting power of the Company. Upon consummation of a
reverse stock split of the Company’s common stock, resulting in approximately 15,000,000
shares of the Company’s common stock outstanding, the investors shall subsequently take all
necessary steps with the Company to convert all outstanding shares of the Series A Preferred
Stock into shares of the Company’s common stock.

In connection with the closing, Jeffrey Busch was appointed as Chairman of the Board of
Directors (the “Board”), John Brugmann was appointed as a Director on the Board, and Mick
Ruxin, M.D., joined the Company as President & Chief Executive Officer, and a Board Member.
Certain current investors and the new investors in the offering will collectively have the right to
appoint 9 total directors to the Board.

Concurrently with the private placement, certain existing debtholders of the Company exchanged
an aggregate of $1,824,856 currently due and payable under existing indebtedness for (i) an
aggregate of 516,155 shares of Series A Preferred Stock (ii) approximately 26,000,000 shares of
series B preferred stock (the “Series B Preferred Stock”) and (iii) new notes for an aggregate
principal amount of $265,091. In addition, certain existing debtholders of the Company who
participated in private placements or exchanges during the year ended December 31, 2017
waived all of the future rights under their financing documents as well as their security interests in
the Company’s assets. Upon filing an amendment to the Company’s articles of incorporation to
increase the number of shares of authorized common stock (the “Amendment”) so that there is an
adequate amount of shares of authorized common stock for issuance upon conversion of the Series
B Preferred Stock, each share of Series B Preferred Stock will be automatically converted into ten
(10) shares of common stock of the Company, subject to adjustment.

The following summary of the terms of the securities described above does not purport to be
complete and is qualified in its entirety by the transaction documents filed on a Current Report
on Form 8-K filed with the Securities and Exchange Commission on May 25, 2018.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall
there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or
sale would be unlawful prior to registration or qualification under the securities laws of any such
state or jurisdiction.

About Avant Diagnostics, Inc.
Avant is a healthcare data-generating solutions company that specializes in biomarker tests that
are being planned or developed in multiple areas of oncology. Avant provides personalized
medicine data generating capabilities through its TheraLink® assays, initially for breast cancer,
to assist clinical oncologists in identifying likely responders, for over 70 FDA-approved drug
treatment regimens. Avant is the leading developer of phospho-proteomic technologies for
measuring the activation status of key signaling pathways, with applications across multiple
cancer types, including breast, colorectal and pancreatic, that are instrumental in the development
of companion diagnostics for molecular-targeted therapies.

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Forward-Looking Statements
Certain statements in this press release are forward-looking within the meaning of the Private
Securities Litigation Reform Act of 1995. These statements may be identified by the use of
forward-looking words such as “anticipate,” “believe,” “forecast,” “estimated” and “intend,”
among others. These forward-looking statements are based on Avant’s current expectations and
actual results could differ materially. There are a number of factors that could cause actual events
to differ materially from those indicated by such forward-looking statements. These factors
include, but are not limited to, substantial competition; our ability to continue as a going
concern; our need for additional financing; uncertainties with respect to lengthy and expensive
clinical trials, that results of earlier studies and trials may not be predictive of future trial results;
and risks related to failure to obtain FDA clearances or approvals and noncompliance with FDA
regulations. There are no guarantees that any of our products will receive regulatory approval for
any indication or prove to be commercially successful. Avant does not undertake an obligation to
update or revise any forward-looking statement except as required by law. Investors should read
the risk factors set forth in Avant’s Form 10-K filed with the Securities and Exchange
Commission on January 13, 2016, and other periodic reports filed with the Securities and
Exchange Commission.

Investor and Media Contact:
Scott VanderMeer
Interim CFO
Phone number: 708-710-9200