As filed with the Securities and Exchange Commission on October 4, 2017

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM S-8

Registration Statement Under the Securities Act of 1933

Ekso Bionics Holdings, Inc.

(Exact name of registrant as specified in its charter)

Amended and Restated 2014 Equity Incentive Plan
(Full Title of the Plan)

Thomas Looby, CEO

Ekso Bionics Holdings, Inc.

1414 Harbour Way, Suite 1201

Richmond, CA 94804

(510) 984-1761

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

Copy to:

Erin M. Anderman, Esq.

Nutter, McClennen & Fish, LLP

155 Seaport Boulevard

Boston, MA 02210

(617) 439-2000

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 pursuant to Section 7(a)(2)(B) of Securities Act. þ

Calculation of Registration Fee

EXPLANATORY NOTE; INCORPORATION BY REFERENCE OF CONTENTS OF REGISTRATION STATEMENTS ON FORMS S-8 (NO. 333-207131; NO. 333-198357)

This Registration Statement registers additional securities of the same class as other securities for which registration statements filed on Forms S-8 relating to Ekso Bionics Holdings, Inc.’s Amended and Restated 2014 Equity Incentive Plan (the “Plan”) are already effective. Pursuant to Instruction E to Form S-8, we incorporate by reference into this Registration Statement the contents of (a) the registration statement on Form S-8 (File No. 333-198357) that we filed with the Securities and Exchange Commission on August 25, 2014 relating to the registration of 2,058,571 shares (taking into account a 1-for-7 reverse stock split on May 4, 2016) of our common stock authorized for issuance under the Plan, and (b) the registration statement on Form S-8 (File No. 333-207131) that we filed with the Securities and Exchange Commission on September 25, 2015, relating to the registration of 1,655,714 shares (taking into account a 1-for-7 reverse stock split on May 4, 2016) of our common stock authorized for issuance under the Plan, in each case, in their entirety and including exhibits thereto. This Registration Statement provides for the registration of an additional 1,000,000 shares of common stock to be issued under the Plan. These 1,000,000 shares represent an increase in the number of shares of common stock reserved for issuance under the Plan, which increase was approved by the stockholders on June 20, 2017 at the 2017 Annual Meeting of Stockholders of Ekso Bionics Holdings, Inc. As a result of the foregoing, the number of shares of common stock reserved under the Plan is now 4,714,285.

*Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Richmond, State of California, on October 4, 2017.

Signatures and POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Thomas Looby and Maximilian Scheder-Bieschin, or either one of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for such person and in his or her name, place and stead, in any and all capacities, to sign any or all further amendments or supplements (including post-effective amendments filed pursuant to Rule 462(b) of the Securities Act of 1933, as amended) to this registration statement and to file the same, with all exhibits thereto, and other documents in connection therewith, with the SEC, granting unto said attorney-in-fact and agent or either one of them full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully as to all intents and purposes as she might or could do in person, hereby ratifying and confirming all that each of said attorneys-in-fact and agents, or any of them, or his substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.