As filed with the Securities and Exchange Commission on August 6, 2018

Registration No. 333-226173

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment No. 2

FORM S-1

REGISTRATION STATEMENT

Under

The Securities Act of 1933

MESA AIR GROUP, INC.

(Exact name of registrant as specified in its charter)

410 North 44th Street, Suite 700

Phoenix, Arizona 85008

(602) 685-4000

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Jonathan G. Ornstein

Chairman and Chief Executive Officer

Mesa Air Group, Inc.

410 North 44th Street, Suite 700

Phoenix, Arizona 85008

(602) 685-4000

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended, check the following box.  ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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 to Section 7(a)(2)(B) of the Securities Act.  ☒

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

EXPLANATORY NOTE

This Amendment No. 2 to Form S-1 Registration Statement (Registration No. 333-226173) of Mesa Air Group, Inc. is being filed solely for the purpose of filing the exhibits indicated in Item 16 of Part II of the Registration Statement. No changes have been made to the prospectus constituting Part I of the Registration Statement or Items 13, 14, 15 or 17 of Part II of the Registration Statement.

PART II

The following table sets forth the costs and expenses, other than underwriting discounts, and commissions, payable in connection with the sale and distribution of the securities being registered. All amounts are estimated except the SEC registration fee and the FINRA filing fee.

Mesa Air Group, Inc. is a Nevada corporation. Nevada corporate law enables us to indemnify any of our directors or officers under the provisions of the NRS if either (i) the director or officer acted in good faith and in a manner which he or she reasonably believed to be in, or not opposed to, our best interests, or (ii) such director or officer is not liable pursuant to NRS 78.138. Under NRS 78.138, a director or officer is not liable unless the presumption that the director or officer acted in good faith and with a view to the interests of the Company have been rebutted, and it is proven that his or her act or failure to act constituted a breach of his or her fiduciary duties as an officer or director and such breach involved intentional misconduct, fraud or a knowing violation of law. Our second amended and restated articles of incorporation to be in effect immediately prior to the consummation of this offering compel indemnification of our directors and officers and permits indemnification of our employees and other agents, in each case to the maximum extent permitted by Nevada law, and our amended and restated bylaws to be in effect immediately prior to the consummation of this offering provide for indemnification of our directors, officers, employees and other agents to the maximum extent permitted by Nevada law. In addition, we have entered into indemnification agreements with our directors and NEOs containing provisions which are in some respects broader than the specific indemnification provisions contained in Nevada law. The indemnification agreements may require us, among other things, to indemnify our directors and officers against certain liabilities that may arise by reason of their status or service as directors and officers and to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified. Reference is also made to Section 8 of the underwriting agreement to be filed as Exhibit 1.1 hereto, which provides for indemnification by the underwriter of our officers and directors against certain liabilities.

During our last three fiscal years and the six months ended March 31, 2018, we have granted equity awards representing an aggregate of 3,303,003 shares of our common stock to employees and directors under our 2011 Plan, 2017 Plan, RSU Plan and SAR Plan, which includes 56,250 shares that were subsequently forfeited and 126,648 shares that were subsequently repurchased.

The sales of the above securities were deemed to be exempt from registration under the Securities Act in reliance upon Rule 701 promulgated under Section 3(b) of the Securities Act as transactions by an issuer not involving any public offering or pursuant to benefit plans and contracts relating to compensation as provided under Rule 701. The recipients of the securities in each of these transactions represented their intentions to acquire the securities for investment only and not with a view to or for sale in connection with any distribution thereof, and appropriate legends were placed upon the stock certificates issued in these transactions. All recipients had adequate access, through their relationships with us, to information about us.

There were no underwriters employed in connection with any of the transactions set forth in Item 15.

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EXHIBIT INDEX

Some of the agreements included as exhibits to the registration statement of which this prospectus forms a part contain representations and warranties by the parties to the applicable agreement. These representations and warranties were made solely for the benefit of the other parties to the applicable agreement and (i) were not intended to be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate; (ii) may have been qualified in such agreement by disclosures that were made to the other party in connection with the negotiation of the applicable agreement; (iii) may apply contract standards of “materiality” that are different from “materiality” under the applicable securities laws; and (iv) were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement.

The undersigned registrant acknowledges that, notwithstanding the inclusion of the foregoing cautionary statements, it is responsible for considering whether additional specific disclosures of material information regarding contractual provisions are required to make the statements in the registration statement of which this prospectus forms a part not misleading.

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No financial statement schedules have been submitted because they are not required or are not applicable or because the information required is included in the consolidated financial statements or the notes thereto.

The undersigned registrant hereby undertakes that:

(1) insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the provisions described in Item 14, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue; and

(2) for purposes of determining any liability under the Securities Act, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective; and

(3) for the purpose of determining any liability under the Securities Act, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(4) The undersigned registrant hereby undertakes to provide to the underwriter at the closing specified in the underwriting agreements certificates in such denominations and registered in such names as required by the underwriter to permit prompt delivery to each purchaser.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, we have duly caused this Amendment No. 2 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Phoenix, State of Arizona, on the 6th day of August, 2018.

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Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment No. 2 to the Registration Statement has been signed by the following persons in the capacities indicated below on the dates indicated.

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