Item
4.01 Change in Registrant’s Certifying Accountant
On
October 15, 2019, Research Frontiers Inc. (the “Company”) dismissed BDO USA LLP (“BDO”) as the Company’s
independent registered public accounting firm and appointed CohnReznick LLP as its new auditors. The decision to change the Company’s
independent registered public accounting firm was the result of a comprehensive review process conducted by the Audit Committee,
which included, but was not limited to, an assessment of the expertise of each firm, the service approach and the overall level
of fees. Based on such review, it was determined that that CohnReznick was best suited to serve as the Company’s independent
registered public accounting firm.
BDO’s
audit report on the Company’s consolidated financial statements as of and for the year ended December 31, 2018 did not contain
an adverse opinion or a disclaimer of opinion and was not qualified or modified as to uncertainty, audit scope, or accounting
principles.
During
the years ended December 31, 2018 and December 31, 2017, and through the subsequent interim period through October 15, 2019, there
were (i) no disagreements (as described in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) between the Company
and BDO on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures,
which, if not resolved to BDO’s satisfaction, would have caused BDO to make reference thereto in their reports on the financial
statements for such years, and (ii) no “reportable events” within the meaning if Item 304(a)(1)(v) of Regulation S-K.
BDO has not conducted any review of the interim quarter ended September 30, 2019.
The
Company provided BDO with a copy of the disclosures it is making in this Current Report on Form 8-K and requested in accordance
with applicable practices that BDO furnish a letter addressed to the Securities and Exchange Commission stating whether or not
it agrees with the statements made herein. A copy of BDO’s letter dated October 15, 2019, is filed as Exhibit 16.1
hereto.
On
October 15, 2019, the Audit Committee approved the appointment of CohnReznick LLP (“CohnReznick”) as the Company’s
independent registered public accounting firm for the Company’s year ending December 31, 2019. During the fiscal years ended
December 31, 2018 and through the subsequent interim period through October 15, 2019, neither the Company nor anyone acting on
its behalf has consulted with CohnReznick regarding (i) the application of accounting principles to a specific transaction, either
completed or proposed, or the type of audit opinion that might be rendered on the Company’s financial statements, and neither
a written report or oral advice was provided to the Company that was an important factor considered by the Company in reaching
a decision as to any accounting, auditing, or financial reporting issue, (ii) any matter that was the subject of a disagreement
within the meaning of Item 304(a)(1)(iv) of Regulation S-K, or (iii) any reportable event within the meaning of Item 304(a)(1)(v)
of Regulation S-K.
CohnReznick
is a national audit, tax, and business advisory firm founded in 1919 with international reach through global subsidiaries and
Nexia International. As one of the top accounting firms in the United States with over $600 million in annual revenue, CohnReznick
provides forward-thinking service across nearly two dozen industries and serves businesses ranging from multigenerational family-run
enterprises to public companies in the Fortune 1000.