Ekso Bionics Holdings, INC.

67,134,768 Shares

Common Stock

This prospectus supplement no. 3 (the “Supplement”) supplements information contained in the prospectus dated April 6, 2015, as supplemented by the prospectus supplement no. 1 dated April 23, 2015 and the prospectus supplement no. 2 dated May 11, 2015 (collectively, the “Prospectus”), relating to the resale by selling stockholders of Ekso Bionics Holdings, Inc., a Nevada corporation, of up to 67,134,768 shares of our common stock, par value $0.001 per share.  Of the shares being offered, 54,008,968 are presently issued and outstanding and 13,125,800 are issuable upon exercise of common stock purchase warrants. The shares offered by the Prospectus may be sold by the selling stockholders from time to time in the open market, through privately negotiated transactions or a combination of these methods, at market prices prevailing at the time of sale or at negotiated prices.

This Supplement is being filed to update and supplement the information in the Prospectus with the information contained in our Quarterly Report on Form 10-Q filed with the Securities and Exchange Committee for the quarterly period ended June 30, 2015 (the “Form 10-Q”). Accordingly, we have attached the Form 10-Q to this Prospectus Supplement.

This Supplement is incorporated by reference into, and should be read in conjunction with, the Prospectus. This Supplement is not complete without, and may not be delivered or utilized except in connection with, the Prospectus, including any amendments or supplements thereto. Any statement contained in the Prospectus shall be deemed to be modified or superseded to the extent that information in this Prospectus Supplement modifies or supersedes such statement. Any statement that is modified or superseded shall not be deemed to constitute a part of the Prospectus except as modified or superseded by this Prospectus Supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this Supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this Prospectus Supplement is August 13, 2015

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended June 30, 2015

or

For the transition period from ______ to ______

Commission File Number: 333-181229

Ekso Bionics Holdings, Inc.

(Exact name of registrant as specified in its charter)

(203) 723-3576

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically and posted to its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

The number of shares of registrant’s common stock outstanding as of August 3, 2015 was: 102,139,765

Ekso Bionics Holdings, Inc.

Quarterly Report on Form 10-Q

Table of Contents

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

Ekso Bionics Holdings, Inc.

Condensed Consolidated Balance Sheets

(in thousands, except share and par value amounts)

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

 Ekso Bionics Holdings, Inc.

Condensed Consolidated Statements of Operations

(in thousands, except share and per share amounts)

(unaudited)

See Accompanying Notes to the Unaudited Condensed Consolidated Financial Statements

Ekso Bionics Holdings, Inc.

Condensed Consolidated Statements of Cash Flows

(in thousands)

(unaudited)

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

Ekso Bionics Holdings, Inc.

Notes to Unaudited Condensed Consolidated Financial Statements

(in thousands, except share and per share amounts)

(unaudited)

1. Organization

Description of Business and Liquidity

On January 15, 2014, a wholly-owned subsidiary of Ekso Bionics Holdings, Inc. named Ekso Acquisition Corp, merged with and into Ekso Bionics, Inc. (the “Merger”). Ekso Bionics, Inc. was the surviving corporation and became a wholly-owned subsidiary of Ekso Bionics Holdings, Inc. As a result of this transaction, Ekso Bionics Holdings, Inc. discontinued its pre-merger operations, acquired the business of Ekso Bionics, Inc. and continues the operations of Ekso Bionics, Inc. as a publicly traded company. See Note 3, The Merger, Offering and Other Related Transactions. Ekso Bionics, Inc. was incorporated in January 2005 in the State of Delaware. We are currently headquartered in Richmond, California.

As used in these notes to the condensed consolidated financial statements, the term “the Company” refers to Ekso Bionics Holdings, Inc. (formerly known as PN Med Group, Inc.) and its direct and indirect wholly-owned subsidiaries, including Ekso Bionics, Inc. and Ekso Bionics Ltd., after giving effect to the Merger; the term “Holdings” refers to the business of Ekso Bionics Holdings, Inc. prior to the Merger, and the term “Ekso Bionics” refers to Ekso Bionics, Inc. prior to the Merger. Unless otherwise indicated, all dollar amounts included in these notes to the financial statements are in thousands.

We are a leading developer and manufacturer of human bionic exoskeletons. We were founded after the Robotics and Human Engineering Laboratory at the University of California, Berkeley had a breakthrough in demonstrating human exoskeletons that are more energy efficient than previously thought possible.

We are pioneering the field of human exoskeletons to augment human strength, endurance and mobility. We design, develop and sell wearable robots, or “human exoskeletons,” that have applications in healthcare, industrial, military, and consumer markets. Our exoskeleton systems are strapped over the user’s clothing, enabling individuals with neurological conditions affecting gait (e.g., stroke or spinal cord injury) to walk again, permitting soldiers to carry heavy loads for long distances while mitigating lower back, knee, and ankle injuries, and allowing industrial workers to increase productivity and quality of work, for extended periods.

Our current medical device product, the Ekso GT, is a wearable bionic suit that provides individuals with stroke, spinal cord injuries and other lower-extremity paralysis or weakness the ability to stand and walk over ground with a full weight-bearing, reciprocal gait using a cane, crutches or a walker under the supervision of a physical therapist. Walking is achieved by the shifting of the user’s body to activate sensors in the device that initiate steps. Battery-powered motors drive the legs, replacing deficient neuromuscular function. First-time users can expect to walk with aid from the device the first time they put on the Ekso exoskeleton (after passing an assessment), while an experienced user can transfer to or from their wheelchair and don or remove the Ekso in less than five minutes.

Our engineering services division, Ekso Labs, is an exoskeleton laboratory that continually integrates emerging technologies into new product applications and expands on such technologies with our partners. Ekso Labs also develops intellectual property through research grants from government organizations, including the United States Special Operations Command and the Department of Defense.

Liquidity

Largely as a result of significant research and development activities related to the creation of our advanced technology and commercialization of this technology into our medical device business, we have incurred significant operating losses and negative cash flows from operations since inception. The Company has also recorded significant non-cash losses associated with revaluation of certain securities, which have also contributed significantly to our accumulated deficits. As of June 30, 2015, we had an accumulated deficit of $81,561.

The Company’s cash as of June 30, 2015, was $16,251 compared to $25,190 at December 31, 2014. During the six months ended June 30, 2015, the Company used $8,462 of cash in operations compared to $8,605 for the six months ended June 30, 2014.

Based upon our current six-month average monthly net use of cash of approximately $1,500 and assuming increases in current revenue and gross profit, offset by incremental net use of cash for increased sales and marketing and research and development, and a potential increase in rental activity for our medical device business, the Company believes it has sufficient resources to meet its financial obligations into the second quarter of 2016.

Our actual capital requirements may vary significantly and will depend on many factors. For example, we plan to continue to increase our investments (i) in our clinical, sales and marketing initiatives to accelerate adoption of the Ekso robotic exoskeleton in the rehabilitation market, (ii) in our research, development and commercialization activities with respect to an Ekso robotic exoskeleton for home use, and/or (iii) in the development and commercialization of able-bodied exoskeletons for industrial use. Consequently, the Company will require significant additional financing in the future, which we intend to raise through corporate collaborations, public or private equity offerings, debt financings or warrant solicitations within the next two to four quarters. Sales of additional equity securities by us could result in the dilution of the interests of existing stockholders. When we need additional financing, there can be no assurance that it will be available when required in sufficient amounts, on acceptable terms or at all. In the event that the necessary additional financing is not obtained, we may be required to reduce our discretionary overhead costs substantially, including research and development, general and administrative and sales and marketing expenses or otherwise curtail operations.

2. Basis of Presentation and Summary of Significant Accounting Policies and Estimates

There have been no material changes to our significant accounting policies as compared to those described in our Annual Report on Form 10-K for the year ended December 31, 2014.

Basis of Presentation

These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), for the presentation of interim financial information. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed, or omitted, pursuant to such rules and regulations. The condensed consolidated balance sheet at December 31, 2014, has been derived from the audited consolidated financial statements at that date but does not include all disclosures required for the annual financial statements and should be read in conjunction with our audited consolidated financial statements and notes thereto included as part of our Annual Report on Form 10-K for the year ended December 31, 2014.

In management’s opinion, the condensed consolidated financial statements reflect all adjustments (including reclassifications and normal recurring adjustments) necessary to present fairly the financial position at June 30, 2015, and results of operations and cash flows for all periods presented. The interim results presented are not necessarily indicative of results that can be expected for a full year. The condensed consolidated financial statements include the accounts of the Company and our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the balance sheet, and the reported amounts of revenues and expenses during the reporting period. For the Company, these estimates include, but are not limited to: revenue recognition, deferred revenue and the deferral of the associated costs, useful lives assigned to long-lived assets, realizability of

deferred tax assets, the valuation of options and warrants, and contingencies. Actual results could differ from those estimates.

Concentration of Credit Risk and Other Risks and Uncertainties

Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash and accounts receivable. We maintain our cash accounts in excess of federally insured limits. However, we believe we are not exposed to significant credit risk due to the financial position of the depository institutions in which these deposits are held.  We extend credit to customers in the normal course of business and perform ongoing credit evaluations of our customers. Concentrations of credit risk with respect to accounts receivable exist to the full extent of amounts presented in the consolidated financial statements. We do not require collateral from our customers to secure accounts receivable.

Accounts receivable are derived from the sale of products shipped and services performed for customers located in the U.S. and throughout the world. Invoices are aged based on contractual terms with the customer. We review accounts receivable for collectability and provide an allowance for credit losses, as needed. We have not experienced any material losses related to accounts receivable as of June 30, 2015 and December 31, 2014. Many of the sales contracts with customers outside of the U.S. are settled in a foreign currency other than the U.S. dollar. We do not enter into any foreign currency hedging agreements and are susceptible to gains and losses from foreign currency fluctuations. To date, we have not experienced significant gains or losses upon settling foreign currency denominated accounts receivable.

As of June 30, 2015, we had two customers with accounts receivable balances totaling 10% or more of our total accounts receivable (26% and 10%), compared with two customers as of December 31, 2014 (22% and 11%).

In the three months ended June 30, 2015, we had one customer with sales comprising of 10% or more of our total customer sales (32%), compared with two customers in the three months ended June 30, 2014 (15% and 12%). In the six months ended June 30, 2015, we had two customers with sales comprising of 10% or more of our total customer sales (27%, and 11%), compared with one customer in the six months ended June 30, 2014 (17%).

Common Stock Warrants

We accounted for the common stock warrants issued in connection with our Merger and related private placement offering (see Note 3, The Merger, Offering and Other Related Transactions) in accordance with the guidance in Accounting Standards Codification (“ASC”) 815-40. Under ASC 815-40, the warrants did not meet the criteria for equity treatment and were recorded as a liability. The warrants initially had an anti-dilution clause that allowed for a decrease in the exercise price of the warrants if the Company issued additional shares of common stock without consideration or for consideration per share less than the exercise price of such warrants. Accordingly, we classified the warrant instruments as liabilities at their fair value at the date of issuance and re-measured the warrants at each balance sheet date. Changes in the fair value were recognized as a gain (loss) on warrant liability in our Condensed Consolidated Statement of Operations. These warrants were amended in November 2014 to remove the price-based anti-dilution provision, among other things. Accordingly, the warrants are no longer recorded as a liability.

Recent Accounting Pronouncements

In July 2015, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2015-11 Simplifying the Measurement of Inventory. Under ASU 2015-11, inventory is to be measured at the lower of cost and net realizable value (“NRV”). NRV is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation.

The updated guidance is effective for annual reporting periods beginning on or after December 15, 2016, and interim periods therein. Early adoption is permitted. Management is in the process of assessing the impact of ASU 2015-11 on the Company’s consolidated financial statements.

3. The Merger, Offering and Other Related Transactions

Holdings was incorporated in the State of Nevada on January 30, 2012, as a distributor of medical supplies and equipment to municipalities, hospitals, pharmacies, care centers, and clinics in Chile. At the time of the Merger, Holdings was a “shell company” as defined in Rule 12b-2 of the Exchange Act. Holdings’ fiscal year end was previously March 31 but was changed to December 31 in connection with the Merger.

On January 15, 2014, Holdings and a newly formed wholly-owned subsidiary of Holdings, Ekso Acquisition Corp, (“Acquisition Sub”) entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Ekso Bionics. Under the Merger Agreement, Acquisition Sub merged with and into Ekso Bionics, with Ekso Bionics remaining as the surviving corporation and with the stockholders of Ekso Bionics exchanging all of their common stock, convertible preferred stock (“preferred stock”) and warrants to purchase preferred stock issued and outstanding immediately prior to the closing of the Merger into an aggregate of 42,615,556 shares of Holdings’ common stock and warrants to purchase 621,361 shares of common stock. In addition, options to purchase 4,989,111 shares of common stock of Ekso Bionics were converted into options to purchase 7,602,408 shares of common stock of Holdings. These shares are in addition to 5,280,368 outstanding shares of Holdings common stock held by certain pre-Merger stockholders of Holdings, consisting of 4,500,600 shares held by such stockholders prior to the Merger and an additional 779,768 shares issued to such stockholders pursuant to a provision in the Merger Agreement requiring us to issue a number of shares of common stock such that the aggregate ownership of the pre-Merger stockholders (not including any shares of common stock purchased by them in the private placement offering described below) was approximately 6.8% of the outstanding common stock of the Company following the Merger and private placement offering.

Upon the closing of the Merger, under the terms of a split-off agreement and a general release agreement, Holdings transferred all of its pre-Merger operating assets and liabilities to a newly formed wholly-owned special-purpose subsidiary (“Split-Off Subsidiary”), and transferred all of the outstanding shares of capital stock of Split-Off Subsidiary to two individuals who were the pre-Merger majority stockholders of Holdings and Holdings’ former officers and sole director (the “Split-Off”), in consideration of and in exchange for (a) the surrender and cancellation of all shares of Holdings’ common stock held by such individuals (which were cancelled and resumed the status of authorized but unissued shares of our common stock) and (b) certain representations, covenants and indemnities.

Accounting for Reverse Merger

Ekso Bionics, as the accounting acquirer, recorded the Merger as the issuance of stock for the net monetary assets of Holdings accompanied by a recapitalization. This accounting was identical to that resulting from a reverse merger, except that no goodwill or intangible assets were recorded. In filings with the SEC subsequent to the Merger, including this filing, the historical financial statements of Holdings before the Merger have been replaced with the historical financial statements of Ekso Bionics before the Merger. The Merger is intended to be treated as a tax-free exchange under Section 368(a) of the Internal Revenue Code of 1986, as amended.

Retroactive Conversion of all Share and Per Share Amounts

In accordance with reverse merger accounting guidance, amounts for Ekso Bionics’ historical (pre-merger) common stock, preferred stock and warrants and options to purchase common stock, including share and per share amounts, have been retroactively adjusted using their respective exchange ratios in these financial statements unless otherwise disclosed. The conversion ratios were 1.5238, 1.6290, 1.9548 and 1.9548 for one with respect to shares of Ekso Bionic’s common stock, Series A preferred stock, Series A-2 preferred stock and Series B preferred stock, respectively.

Repayment of 2013 Bridge Note

In November 2013, in anticipation of the Merger and related private placement offering, Ekso Bionics completed a private placement to accredited investors of $5,000 of its senior subordinated secured convertible notes (“2013 Bridge Notes”). Upon the closing of the Merger and the private placement offering described below, the $5,000 in outstanding principal and $83 of accrued interest of the 2013 Bridge Notes automatically converted into 5,000,000 Units (as defined below), and investors in the 2013 Bridge Notes received warrants to purchase 2,500,000 shares of common stock at an exercise price of $1.00 per share for a term of three years (“Bridge Warrants”). The Bridge Warrants had weighted average anti-dilution protection, subject to customary exceptions.

Private Placement Offering

Concurrently with the closing of the Merger and in contemplation of the Merger, the Company held a closing of a private placement offering (“PPO”) in which it sold 20,580,000 units (“Units”) at a purchase price of $1.00 per Unit, with each Unit consisting of one share of common stock plus a warrant to purchase an additional share of common stock of the Company at $2.00 per share with a five year term (“PPO Warrants”). Included in the initial Unit sales were 5,000,000 Units that were issued upon conversion of the 2013 Bridge Notes mentioned above. Between January 29, 2014 and February 6, 2014, the Company issued an additional 9,720,000 Units in subsequent closings of the PPO. As a result of issuing a total of 30,300,000 Units, (a) the Company received gross proceeds of $25,300, (b) $5,083 of debt and accrued interest attributable to the 2013 Bridge Notes was settled with the issuance of 5,000,000 Units, (c) $2,553 of our Senior Note Payable (as defined below) was paid in full, and (d) we incurred offering costs of $3,338.

Investors in the Units have weighted average anti-dilution protection with respect to the shares of common stock included in the Units if within 24 months after the final closing of the PPO the Company issues additional shares of common stock or common stock equivalents (subject to customary exceptions, including but not limited to issuances of awards under the Company’s 2014 Equity Incentive Plan) for consideration per share less than $1.00. The PPO warrants also had weighted average anti-dilution protection, subject to customary exceptions.

In connection with the conversion of the 2013 Bridge Notes and the PPO, the placement agent for the PPO and its sub-agents were paid an aggregate commission of $3,030 and were issued warrants to purchase an aggregate of 3,030,000 shares of common stock with a term of five years and an exercise price of $1.00 per share (“Agent Warrants”). The Agent Warrants had weighted average anti-dilution protection, subject to customary exceptions.

Offer to Amend and Exercise

In November 2014, the Company consummated an offer to amend and exercise its PPO Warrants at a temporarily reduced exercise price (“Offer to Amend and Exercise”). Pursuant to the Offer to Amend and Exercise, an aggregate of 22,755,500 PPO Warrants were exercised by their holders and were also amended to reduce the exercise price from $2.00 to $1.00 per share of common stock, and to restrict the ability of the holder of shares issuable upon exercise of the amended warrants to sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any of such shares without the prior written consent of the Company for a period of 50 days after the expiration date of the Offer to Amend and Exercise.

In connection with the Offer to Amend and Exercise, the holders of a majority of the then outstanding PPO Warrants, Bridge Warrants, and Agent Warrants approved an amendment to remove the price-based anti-dilution provisions in those warrants (see Note 9, Warrants).

2014 Equity Incentive Plan

Before the Merger, the Board of Directors adopted, and the stockholders approved, the 2014 Equity Incentive Plan (“2014 Plan”), which provides for the issuance of incentive awards constituting up to 14,410,000 shares of common stock to officers, key employees, consultants and directors. In connection with the Merger, options to purchase Ekso Bionics common stock outstanding immediately prior to the Merger were converted into options to purchase an aggregate of 7,602,408 shares of Holdings issued under the 2014 Plan.

On the closing of the Merger, the Board granted to officers and directors options to purchase an aggregate of 2,300,000 shares of common stock under the 2014 Plan.

Subsequent to the Merger, on June 10, 2015, the Board submitted to the stockholders and the stockholders approved and ratified an amendment of the 2014 Plan to increase the maximum number of shares of common stock that may be issued under the 2014 Plan by 11,590,000 shares to 26,000,000 shares. As of June 30, 2015, there were 11,767,633 shares available for future awards.

4. Deferred Revenues

In connection with our medical device sales and research services, we often receive cash payments before our earnings process is complete. In these instances, we record the payments as customer deposits until a device is shipped to the customer, or as customer advances in the case of research services until the earnings process is achieved.

Revenue from our Ekso medical device sales is deferred and recognized over the maintenance period. Accordingly, at the time of shipment to the customer the amount billed is recorded as deferred revenue. Also, at the time of shipment, the related inventory is reclassified to deferred cost of revenue where it is amortized to cost of revenue over the same period as the related revenue.

Deferred revenues and deferred cost of revenues consist of the following:

5. Accrued Liabilities

Accrued liabilities consist of the following:

6. Notes Payable

In 2012, the Company entered into a note agreement in connection with its lease agreement for our Richmond, California facility. The note, for an aggregate principal of $200, with an interest rate of 7%, minimum monthly payments of $4, and a May 31, 2017, maturity, was used to fund leasehold improvements. In addition, the Company has a long-term capital lease obligation of $11 (see Note 7, Operating and Capital Leases).

Future obligations under these debt instruments as of June 30, 2015 are as follows:

7. Operating and Capital Leases

On November 29, 2011, the Company entered into an operating lease agreement for its headquarters and manufacturing facility in Richmond, California. The lease term commenced in March 2012 and expires in May 2017. The lease provides the Company with one option to renew for five additional years. The Company also leases nominal office equipment.

Future minimum operating lease payments are as follows as of June 30, 2015:

The Company also has a capital lease for the purchase of machinery and equipment with a balance of $11 and $13 as of June 30, 2015, and December 31, 2014, respectively, which is classified as a component of Notes payable, non-current (see Note 6, Notes Payable).

Rent expense under the Company’s operating leases was $86 and $86 for the three month periods ended June 30, 2015, and 2014, respectively and was $172 and $171 for the six month period ended June 30, 2015, and 2014, respectively.

8. Capitalization and Equity Structure

The Company’s authorized capital stock at June 30, 2015, consisted of 500,000,000 shares of common stock and 10,000,000 shares of preferred stock. At June 30, 2015, 102,123,767 shares of common stock were issued and outstanding, and no shares of preferred stock were issued and outstanding.

9. Warrants

As discussed in Note 3, The Merger, Offering and Other Related Transactions, the Company issued during the Merger and PPO, warrants to purchase a total of 36,055,000 shares of common stock of which 30,300,000 were at an exercise price of $2.00 per share, and the balance at $1.00 per share. These warrants contained “weighted average” anti-dilution protection in the event that we issued common stock or securities convertible into or exercisable for shares of common stock at a price lower than the subject warrant’s exercise price, subject to certain customary exceptions, as well as customary provisions for adjustment in the event of stock splits, subdivision or combination, mergers, etc.

Due to the market price of the Company’s common stock price exceeding the exercise price of the then outstanding warrants, the Company recorded a non-cash charge of $77,437 during the period ended March 31, 2014. As the market price of our common stock declined during the three months ended June 30, 2014, but still exceeded the exercise price of outstanding warrants, the Company recorded a non-cash benefit of $60,458 for the period.

The factors utilized in re-valuing the warrants were as follows as of June 30, 2014:

These warrants were amended in November 2014 to remove the price-based anti-dilution provision, among other things. Accordingly, the warrants are no longer recorded as a liability.

Warrant activity for the six month period ended June 30, 2015 is as follows:

10. Stock-based Compensation Plans and Awards

In January 2014, and prior to the Merger, the Board of Directors and a majority of the stockholders adopted the 2014 Plan that allowed for the issuance of 14,410,000 shares of common stock. Options previously issued under the Ekso Bionics 2007 Equity Incentive Plan were converted into options to purchase an aggregate of 7,602,408 shares of the Company’s common stock under the 2014 Plan. On June 10, 2015, the 2014 Plan was amended and restated by the stockholders to increase the maximum number of shares by 11,590,000 shares to an aggregate of 26,00,000 shares of common stock available for issuance under the 2014 Plan. As of June 30, 2015, there were 11,767,633 shares available for future awards.

Under the terms of the 2014 Plan, the Board of Directors may award stock, options, or similar rights having either a fixed or variable price related to the fair market value of the shares and with an exercise or conversion privilege related to the passage of time, the occurrence of one or more events, or the satisfaction of performance criteria or other conditions, or any other security with the value derived from the value of the shares. Such awards include stock options, restricted stock, restricted stock units, stock appreciation rights and dividend equivalent rights.

The Board of Directors may grant stock options under the 2014 Plan at a price of not less than 100% of the fair market value of our common stock on the date the option is granted. Incentive stock options granted to employees who, on the date of grant, own stock representing more than 10% of the voting power of all of our classes of stock, are granted at an exercise price of not less than 110% of the fair market value of our common stock. The maximum term of incentive stock options granted to employees who, on the date of grant, own stock possessing more than 10% of the voting power of all our classes of stock, may not exceed five years. The maximum term of an incentive stock option granted to any other participant may not exceed ten years. Subject to the limitations discussed above, the Board of Directors determines the term and exercise or purchase price of other awards granted under the 2014 Plan. The Board of Directors also determines the terms and conditions of awards, including the vesting schedule and any forfeiture provisions. Options granted under the 2014 Plan may vest upon the passage of time, generally four years, or upon the attainment of certain performance criteria established by the Board of Directors. We may from time to time grant options to purchase common stock to non-employees for advisory and consulting services. Pursuant to ASC 505-50, Equity-Based Payments to Non-Employees, we periodically re-measure the fair value of these stock options using the Black-Scholes option pricing model and recognize expense ratably over the vesting period of each stock option award. Upon exercise of an option, it is the Company’s policy to issue new shares of common stock.

The following table summarizes information about the Company’s stock options outstanding at June 30, 2015, and activity during the six-month period then ended:

Of the 697,356 shares exercised, 535,404 were on a cashless basis for which the Company did not receive any proceeds, but instead withheld 243,647 shares from the option holders exercising such award to cover the exercise amount.

As of June 30, 2015, total unrecognized compensation cost related to unvested stock options was $5,386. This amount is expected to be recognized as stock-based compensation expense in the Company’s Condensed Consolidated Statements of Operations over the remaining weighted average vesting period of 3.09 years.

The per-share fair value of each stock option was determined on the date of grant using the Black-Scholes option pricing model using the following assumptions:

Total stock-based compensation expense related to options granted to employees and non-employees was included in the Condensed Consolidated Statements of Operations as follows:

11. Income Taxes

There were no material changes to the unrecognized tax benefits in the three months ended June 30, 2015, and the Company does not expect significant changes to unrecognized tax benefits through the end of the fiscal year. Because of the Company’s history of tax losses, all years remain open to tax audit.

12. Commitments and Contingencies

Contingencies

In the normal course of business, the Company is subject to various legal matters. In the opinion of management, the resolution of such matters will not have a material adverse effect on the Company’s condensed consolidated financial statements.

Material Contracts

The Company enters into various license, research collaboration and development agreements which provide for payments to the Company for government grants, fees, cost reimbursements typically with a markup, technology transfer and license fees, and royalty payments on sales.

The Company has two license agreements to maintain exclusive rights to patents. The Company is also required to pay 1% of net sales of products sold to entities other than the U.S. government. In the event of a sublicense, the Company will owe 21% of license fees and must pass through 1% of the sub-licensee’s net sales of products sold to entities other than the U.S. government. The license agreements also stipulate minimum annual royalties, starting in 2015 and for future years, of $50 per year.

U.S. Food and Drug Administration Clearance

The Company’s Ekso GT robotic exoskeleton has been marketed in the United States as a Class I 510(k) exempt Powered Exercise Equipment device since February 2012. On June 26, 2014, the U.S. Food and Drug Administration (“FDA”) announced the creation of a new product classification for Powered Exoskeleton devices. On October 21, 2014, the FDA published the summary for the reclassified Powered Exoskeleton and informed us in writing of the agency’s belief that this new product classification applied to the Ekso GT device. This new product classification was designated as being Class II, which requires the clearance of a 510(k) notice. Consequently, the FDA requested that we file a 510(k) notice to obtain this clearance. Per the FDA’s request, we filed our 510(k) notice on December 24, 2014, and this submission is currently under review by the FDA. The Company intends to continue marketing the Ekso robotic exoskeleton under its current Class I registration and listing with its current indications for use until 510(k) clearance is either granted or denied by the FDA or the Company is otherwise notified by the FDA to cease such activities. The Company believes that in situations where the class of a product has been elevated by the FDA, manufacturers are normally granted enforcement discretion by the FDA and given ample time to seek clearance at the new class level. Nonetheless, the FDA may not agree with our decision to continue marketing the device until a 510(k) notice is cleared. From the time of our submission to the date of this report, the FDA has not indicated or notified the Company that it disagrees with this decision. If the FDA disagrees with our decision, we may be required to cease marketing or to recall the products until we obtain clearance or approval, and we may be subject to regulatory fines or penalties.

13. Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share:

The following table sets forth potential shares of common stock that are not included in the calculation of diluted net loss per share because to do so would be anti-dilutive as of the end of each period presented:

14. Segment Disclosures

The Company has two reportable segments, Engineering Services and Medical. Engineering Services generates revenue principally from collaborative research and development service arrangements, technology license agreements, and government grants where the Company uses its robotics domain knowledge in bionic exoskeletons

to bid on and procure contracts and grants from entities such as such as the National Science Foundation and the Defense Advanced Research Projects Agency. The Medical segment designs, engineers, and manufactures exoskeletons for applications in the medical and military markets.

The Company evaluates performance and allocates resources based on segment gross profit margin. The reportable segments are each managed separately because they serve distinct markets, and one segment provides a service and the other manufactures and distributes a unique product. The Company does not consider net assets as a segment measure and, accordingly, assets are not allocated.

Segment reporting information is as follows:

Geographic information for revenue based on location of customer is as follows:

Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion of our financial condition and results of operation in conjunction with the condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q and on our Annual Report on Form 10-K for the year ended December 31, 2014.

This Quarterly Report on Form 10-Q contains forward-looking statements, such as statements of our plans, objectives, expectations and intentions. Any statements that are not statements of historical fact are forward-looking statements. Terms such as “may,” “might,” “would,” “should,” “could,” “project,” “estimate,” “pro-forma,” “predict,” “potential,” “strategy,” “anticipate,” “attempt,” “develop,” “plan,” “help,” “believe,” “continue,” “intend,” “expect,” “future,” and terms of similar import (including the negative of any of the foregoing) may be intended to identify forward-looking statements.

The following factors, among others, including those described in the section titled “Risk Factors” included in our Annual Report on Form 10-K for the year ended December 31, 2014, could cause our future results to differ materially from those expressed in the forward-looking information:

Although we believe that the assumptions underlying the forward-looking statements and forward-looking information contained herein are reasonable, any of the assumptions could be inaccurate, and therefore such statements and information included in this Quarterly Report on Form 10-Q may not prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements and forward-looking information included herein, the inclusion of such statements and information should not be regarded as a representation by us or any other person that the results or conditions described in such statements and information or that our objectives and plans will be achieved. Such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

Overview

The Company designs, develops and sells wearable bionic devices or “human exoskeletons” that have applications in healthcare, industrial, military, and consumer markets. Our exoskeletons systems are strapped over the user’s clothing and augment human strength, endurance and mobility. These robotic or mechanical systems serve multiple markets and can be used both by able-bodied users as well as by persons with physical disabilities. We or our partners have sold, rented or leased devices that (a) enable individuals with neurological conditions affecting gait (e.g., stroke or spinal cord injury) to rehabilitate and to walk again; (b) allow industrial workers to perform heavy duty work for extended periods; and (c) permit soldiers to carry heavy loads for long distances while mitigating lower back, knee, and ankle injuries. To-date, we have shipped approximately 145 of our devices to over 100 rehabilitation centers, distributors, and individual users for rehabilitation.

In our efforts to develop exoskeleton technology, we have established an extensive intellectual property portfolio that includes, in the United States alone and as of July 1, 2015, 12 patents that have been granted, 21 patent applications that are currently pending (meaning a complete patent application has been filed with the applicable patent authority and additional action is pending), and nine provisional patent applications that have been filed (meaning we have filed a short form application to establish an early filing date in anticipation of completion and submission of a complete application). All but three of the patents and pending patent applications are either solely owned by us or exclusively licensed to us. Many of these patents have also been filed internationally as appropriate for their respective subject matter. Our patent portfolio includes product and method type claims, since the devices that we produce and the processes performed by those devices are patentable. Our patents encompass technologies relevant to our devices, including medical exoskeletons, commercial exoskeletons, actuators, and strength-enhancing exoskeletons. The earliest priority date reaches back to 2003, and new applications continue to be filed.

Our long-term goal is to have one million people stand and walk in an Ekso exoskeleton by February 2022. Our first step to achieving that goal was for us to focus on selling our medical exoskeletons to rehabilitation centers and hospitals in the United States and Europe. We began that journey with the February 2012 sale of the Ekso, an exoskeleton for complete spinal cord injuries (“SCI”). We have since expanded that effort with the July 2013 launch of our Variable Assist software and the December 2013 release of our next generation Ekso hardware platform, Ekso GT. The Variable Assist software enables users with any amount of lower extremity strength to contribute their own power for either leg to achieve self-initiated walking. The Ekso GT builds on the experience of the Ekso and incorporates the Variable Assist, allowing us to expand our sales and marketing efforts beyond SCI-focused centers to centers supporting stroke and related neurological patients.

The Ekso GT is a wearable bionic suit that provides individuals with stroke, spinal cord injuries and other lower-extremity paralysis or weakness the ability to stand and walk over ground with a full weight-bearing, reciprocal gait using a cane, crutches or a walker under the supervision of a physical therapist. Walking is achieved by the shifting of the user’s body to activate sensors in the device that initiate steps. Battery-powered motors drive the legs, replacing deficient neuromuscular function. First-time users can expect to walk with aid from the device the first time they put on the Ekso exoskeleton (after passing an assessment), while an experienced user can transfer to or from their wheelchair and don or remove the Ekso in less than five minutes.

Most recently, we further upgraded our technology with the announcement in June 2015 of SmartAssist and the ability of the Ekso GT to integrate functional electrical stimulation (“FES”).  Our SmartAssist software is the next generation software after Variable Assist, both improving on its core functionality and adding new features. The SmartAssist software allows therapists to utilize Ekso GT across a broader continuum of care so that patients can use the device earlier for the pre ambulatory exercises and later during therapy to assist only as needed for each leg. The addition to the Ekso GT of FES integration offers the potential to combine the benefits of these two leading technologies into a single product offering.

Ekso Labs, our engineering services division, is focused on technology development and future applications. It is an exoskeleton laboratory that integrates emerging technologies into new product applications and expands on it for our partners. To date, the majority of our Ekso Labs revenue has been in the form of research grants from government organizations including United States Special Operations Command, the Defense Advanced Research Projects Agency, the National Institute of Health and the National Science Foundation. These projects fund research and development on new exoskeleton systems, providing the Company with new intellectual property and exoskeleton designs that have the potential for commercialization.

In addition to furthering exoskeleton technology for our current medical applications, Ekso Labs’ research and development work may have potential use in future, able-bodied models of the Ekso human exoskeleton. Many of the research projects funded by grants are focused on researching future medical applications and capabilities not yet ready for commercial development. Other projects, often funded by commercial partners or the U.S. military, focus on able-bodied human exoskeleton applications. One such development project was the Human Universal Load Carrier (“HULC”), a robotic exoskeleton designed for Lockheed Martin Corporation, with potential military applications to augment strength and endurance, allowing users to carry up to 200 pounds over long distances and rough terrain.

Most recently, industrial models that we are developing are intended to increase an individual’s workload, endurance and productivity. Specifically, we recently announced one initiative in this area with our intention to commercialize a passive, unpowered exoskeleton that allows industrial workers to increase productivity and quality of work and potentially helps industrial employers to reduce workmen’s compensation issues and lower their insurance costs.  We are currently assessing interest of potential customers, including major North American and European construction companies, major tool manufacturers, and have prototypes being tested in the field. 

As we continue to develop, commercialize and market our various exoskeleton technologies, we may seek to establish new strategic relationships with third parties.  Potential relationships may be in the form of technology or product development agreements, sales or distribution agreements, or license agreements.

Regulatory Plans

The U.S. government regulates the medical device industry through various agencies, including but not limited to, the U.S. Food and Drug Administration (“FDA”), which administers the federal Food, Drug and Cosmetic Act.

The FDA classifies medical devices into one of three classes (Class I, II or III) based on the degree of risk the FDA determines to be associated with a device and the extent of control deemed necessary to ensure the device’s safety and effectiveness. Devices requiring fewer controls because they are deemed to pose lower risk are placed in Class I or II. Class I devices are deemed to pose the least risk and are subject only to general controls applicable to all devices, such as requirements for device labeling, premarket notification, and adherence to the FDA’s current good manufacturing practice requirements, as reflected in its Quality System Regulation (“QSR”). Class II devices are intermediate risk devices that are subject to general controls and may also be subject to special controls such as performance standards, product-specific guidance documents, special labeling requirements, patient registries or post-market surveillance. Class III devices are those for which insufficient information exists to assure safety and effectiveness solely through general or special controls, and include life-sustaining, life-supporting, or implantable devices, and devices not “substantially equivalent” to a device that is already legally marketed. Most Class I devices, and some Class II devices are exempted by regulation from the 510(k) clearance requirement and can be marketed without prior authorization from FDA. Class I and Class II devices that have not been so exempted are eligible for marketing through the 510(k) clearance pathway. By contrast, devices placed in Class III generally require premarket approval, or PMA, prior to commercial marketing.

To obtain 510(k) clearance for a medical device, an applicant must submit a premarket notification to the FDA demonstrating that the device is “substantially equivalent” to a predicate device legally marketed in the United States. A device is substantially equivalent if, with respect to the predicate device, it has the same intended use and (i) the same technological characteristics, or (ii) has different technological characteristics and the information submitted demonstrates that the device is as safe and effective as a legally marketed device and does not raise different questions of safety or effectiveness.

While we believe that the Company’s Ekso GT robotic exoskeleton has been appropriately marketed as a Class I 510(k) exempt Powered Exercise Equipment device since February 2012, on June 26, 2014, the FDA announced the creation of a new product classification for Powered Exoskeleton devices. On October 21, 2014, the FDA published the summary for the reclassified Powered Exoskeleton. This new product classification was designated as being Class II, which requires the clearance of a 510(k) notice.

On October 21, 2014, concurrent with the FDA’s publication of the reclassification of Powered Exoskeleton devices, the FDA issued us an Untitled Letter which informed us in writing of the agency’s belief that this new product classification applied to our Ekso GT device. We filed a 510(k) notice for the Ekso robotic exoskeleton on December 24, 2014, and this submission is currently under review by the FDA. The Company intends to continue marketing the Ekso robotic exoskeleton under its current Class I registration and listing with its current indications for use until 510(k) clearance is either granted or denied by the FDA or the Company is otherwise notified by the FDA to cease from such activities. The Company believes that in situations where the class of a product has been elevated by the FDA, manufacturers are normally granted enforcement discretion by the FDA and given ample time to seek clearance at the new class level. Nonetheless, the FDA may not agree with our decision to continue marketing the device until a 510(k) notice is cleared. If the FDA disagrees with our decision, we may be required to cease marketing or to recall our products until we obtain clearance or approval, and we may be subject to regulatory fines or penalties.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the related disclosure of contingent assets and liabilities. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances. Our estimates form the basis for our judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

An accounting policy is considered to be critical if it requires an accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, and if different estimates that reasonably could have been used, or changes in the accounting estimate that are reasonably likely to occur, could materially impact the condensed consolidated financial statements. We believe that our critical accounting policies reflect the more significant estimates and assumptions used in the preparation of the condensed consolidated financial statements.

For the six month period ended June 30, 2015, there have been no material changes to our critical accounting policies and estimates as compared to those described in our Annual Report on Form 10-K for the year ended December 31, 2014, under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Policies, Estimates and Judgments.”

Results of Operations

The following table present our results of operations for the periods indicated (in thousands):

The following table present our results of operations for the periods indicated (in thousands):

Revenue:

For the three months ended June 30, 2015

Medical device revenue increased $0.4 million, or 52%, as compared to the three months ended June 30, 2014, primarily due to the near doubling of the number of medical device sales being recognized to revenue during the three months ended June 30, 2015, as compared to the same period in the prior year. Engineering services revenue increased by $0.6 million, or 110%, as compared to the three months ended June 30, 2014, primarily due to an overall increase in Ekso Labs projects period over period.

For the six months ended June 30, 2015

Medical device revenue increased $0.8 million, or 67%, as compared to the six months ended June 30, 2014, primarily due to the more than doubling of the number of medical device sales being recognized to revenue during the six months ended June 30, 2015, as compared to the same period in the prior year. Engineering services revenue increased by $0.7 million, or 70%, as compared to the six months ended June 30, 2014, primarily due to an overall increase in Ekso Labs projects period over period.

Gross Profit:

For the three months and six months ended June 30, 2015

Our gross profit for the three and six months ended June 30, 2015, increased over the prior year’s period by $457,000 and $380,000, respectively, and overall gross margins increased by 20 percentage points for the three months and were relatively flat for the six months ended June 30, 2015, as compared to the three and six months ended June 30, 2014, respectively.

The increase in medical device cost of revenue as compared to the three and six months ended June 30, 2015 exceeded the increase in associated revenue during the same periods, resulting in lower margins on medical devices, primarily due to increased levels of service expenses, which we recognize on an as-incurred basis. This increase in service expenses is a result of enhancements we are making to our fleet in order to implement numerous technological improvements we have developed subsequent to many of our units being placed into service. The Company expects this level of increased cost associated with enhancing our fleet to continue for the next quarter or two.

The drop in gross profit and margins for our medical devices was more than offset by improvements in gross profit and margins for our engineering services business during the three and six months ended June 30, 2015. The improvement in this segment was driven primarily by a better balance of higher margin projects compared to the prior year.

Operating Expenses:

For the three months ended June 30, 2015

Sales and marketing expenses increased $0.7 million, or 36%, as compared to the three months ended June 30, 2014, due to an increase in sales and marketing personnel and related resources, the greatest of which is an increase of $0.2 million in compensation related costs.

Research and development expenses increased $1.0 million, or 149%, as compared to the three months ended June 30, 2014, primarily due to an increase of $0.4 million in compensation related expenses as a result of increases in headcount and $0.2 million in development of our industrial business.

General and administrative expenses increased $0.1 million, or 3%, as compared to the three months ended June 30, 2014. The increase was primarily attributable to an increase in professional services fees primarily related to public company requirements and investor relations expenses.

For the six months ended June 30, 2015

Sales and marketing expenses increased $1.0 million, or 29%, as compared to the six months ended June 30, 2014, due to an increase in sales and marketing personnel and related resources, the greatest of which is an increase of $0.4 million in compensation related costs.

Research and development expenses increased $1.3 million, or 86%, as compared to the six months ended June 30, 2014, primarily due to an increase of $0.5 million in compensation related expenses as a result of increases in headcount and $0.3 million in expenses related to the development of our industrial business.

General and administrative expenses decreased $0.3 million, or 9%, as compared to the six months ended June 30, 2014. The decrease was primarily attributable to an overall $0.5 million decline in compensation costs. This decrease was offset by a $0.2 million increase in professional services fees primarily related to public company requirements and investor relations expenses.

Other Income (Expense), Net:

For the three months ended June 30, 2015

Total other income (expenses), net decreased $60.5 million, or 100%, as compared to the three months ended June 30, 2014. The decrease of $60.5 million was primarily attributable to a non-cash benefit in the 2014 period relating to outstanding warrants, with no comparable amount in the 2015 period. The 2014 benefit of $60.5 million was attributable to warrants issued in the private placement offering in first quarter of 2014, the value of which declined from March 31, 2014 to June 30, 2014. Due to the price-based anti-dilution provision in the warrants, the Company was required to classify the warrants as a liability and to adjust their fair value to market at each measurement period. In November 2014, the holders of a majority of the warrants approved an amendment to remove the price-based anti-dilution provisions in the warrants. As a result, the warrants are no longer recorded as a liability effective November 2014 because they met the criteria for equity treatment.

For the six months ended June 30, 2015

Total other expense, net for the six months ended June 30, 2015, reflected a decrease of $17.4 million as compared to the six months period ended June 30, 2014, primarily due to a $17.0 million non-cash charges in the 2014 period relating to outstanding warrants, with no comparable amount in the 2015 period. The $17.0 million of prior year warrant liability charges was attributable to warrants issued in the private placement offering in the first quarter of 2014. Interest expense decreased by $0.4 million during the six months ended June 30, 2015, as compared to the prior year periods due to the repayment of outstanding debt in January 2014.

Financial Condition, Liquidity and Capital Resources

Since the Company’s inception, we have devoted substantially all of our efforts toward the development of exoskeletons for the medical, military and industrial markets, toward the commercialization of our medical exoskeletons to rehabilitation centers and toward raising capital. Accordingly, we are considered to be in the early commercialization stage. We have financed our operations primarily through the issuance and sale of equity securities for cash consideration and convertible and promissory notes, as well as from government research grant awards and strategic collaboration payments.

Cash and Working Capital

Since the Company’s inception, we have incurred recurring net losses and negative cash flows from operations. We incurred net losses of $33.7 million for the year ended December 31, 2014, and $9.8 million for the six months ended June 30, 2015. In addition, our operating activities used $15.0 million for the year ended December 31, 2014, and $8.5 million for the six months ended June 30, 2015.

Liquidity and Capital Resources

Largely as a result of significant research and development activities related to the creation of our advanced technology and commercialization of this technology into our medical device business, we have incurred significant operating losses and negative cash flows from operations since inception. The Company has also recorded significant non-cash losses associated with revaluation of certain securities, which have also contributed significantly to our accumulated deficits. As of June 30, 2015, we had an accumulated deficit of $81.6 million.

The Company’s cash as of June 30, 2015, was $16.3 million compared to $25.2 million at December 31, 2014. During the six months ended June 30, 2015, the Company used $8.5 million of cash in operations compared to $8.6 million for the six months ended June 30, 2014.

Based upon our current six-month average monthly net use of cash of approximately $1.5 million and assuming increases in current revenue and gross profit, offset by incremental net use of cash for increased sales and marketing and research and development and a potential increase in rental activity for our medical device business, the Company believes it has sufficient resources to meet its financial obligations into the second quarter of 2016.

Our actual capital requirements may vary significantly and will depend on many factors. For example, we plan to continue to increase our investments (i) in our clinical, sales and marketing initiatives to accelerate adoption of the Ekso robotic exoskeleton in the rehabilitation market, (ii) in our research, development and commercialization activities with respect to an Ekso robotic exoskeleton for home use, and/or (iii) in the development and commercialization of able-bodied exoskeletons for industrial use. Consequently, the Company will require significant additional financing in the future, which we intend to raise through corporate collaborations, public or private equity offerings, debt financings or warrant solicitations within the next two to four quarters. Sales of additional equity securities by us could result in the dilution of the interests of existing stockholders. When we need additional financing, there can be no assurance that it will be available when required in sufficient amounts, on acceptable terms or at all. In the event that the necessary additional financing is not obtained, we may be required to reduce our discretionary overhead costs substantially, including research and development, general and administrative and sales and marketing expenses or otherwise curtail operations.

Cash and Cash Equivalents

The following table summarizes the sources and uses of cash for the periods stated (in thousands). The Company held no cash equivalents for any of the periods presented.

Net Cash Used in Operating Activities

Net cash used in operations for the six months ended June 30, 2015, was driven by our $9.8 million operating loss, offset by $1.2 million in non-cash charges related to depreciation and amortization, and stock compensation expense.

Net cash used in operations for the six months ended June 30, 2014, was driven by our $25.6 million operating loss, offset by $18.2 million in non-cash charges. Non-cash charges included $17.0 million that was attributable to warrants issued in the PPO. Due to an anti-dilution provision in the warrants, the Company was required to classify the warrants as a liability and to adjust their fair value to market at the end of each reporting period.

Net Cash Used in Investing Activities

Net cash used in investing activities of $0.6 million and $0.7 million for the six months ended June 30, 2015, and 2014, respectively, was primarily to acquire property and equipment, including expansion of our company-owned fleet of Ekso units used for demonstrations, loaners to current customers, and as rental units.

Net Cash Provided by Financing Activities

The net cash provided by financing activities for the six months ended June 30, 2015, of $0.1 million was primarily from the exercise of common stock warrants and options.

The net cash provided by financing activities for the six months ended June 30, 2014, of $19.4 million included a net $22.0 million from the PPO. The proceeds from the PPO were in turn used to retire $2.5 million of outstanding debt.

Contractual Obligations and Commitments

The following table summarizes our outstanding contractual obligations as of June 30, 2015, and the effect those obligations are expected to have on our liquidity and cash flows in future periods (in thousands):

The table above reflects only payment obligations that are fixed and determinable.

Item 3. Quantitative and Qualitative Disclosure About Market Risk

We are exposed to market risks in the ordinary course of our business, including inflation risks.

We do not believe that inflation has had a material effect on our business, financial condition or results of operations. If our costs were to become subject to significant inflationary pressures, we may not be able to fully offset such higher costs through price increases. Our inability or failure to do so could harm our business, financial condition and results of operations.

In addition, we conduct business in foreign countries and have a United Kingdom based subsidiary. Accordingly, we are exposed to exchange rate risk. See Item 7A. Quantitative and Qualitative Disclosures About Market Risk in our Annual Report on Form 10-K for the year ended December 31, 2014. 

Item 4. Controls and Procedures

Disclosure Controls and Procedures.

Our management, with the participation of our principal executive officer and principal financial officer, conducted an evaluation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, (“Exchange Act”)) as of June 30, 2015, which are intended to provide reasonable assurance that information required to be disclosed in reports filed by us under the Exchange Act is recorded, processed, summarized and reported within the required time periods and is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

We previously reported a material weakness in internal control over financial reporting related to the timing of the implementation of certain policies, processes and procedures that we have put in place since the Merger, which was described in Item 9A of our Annual Report on Form 10-K for the year ended December 31, 2014. As of December 31, 2014, we considered the material weakness that resulted from the previously identified deficiencies in the aggregate to have been remediated. The Company has implemented policies, practices and procedures to remediate the previously identified material weakness and has begun the process of testing the controls it has put in place. However, many of these have not been operational for a sufficient period of time to be properly tested for their effectiveness over time, and therefore the Company cannot determine our controls to be effective in the aggregate. As a result, our management, with the participation of our principal executive officer and principal financial officer, concluded that our disclosure controls and procedures were not effective as of June 30, 2015.

It should be noted that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment and makes assumptions about the likelihood of future events. There can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.  Management believes that the financial statements included in this Report fairly present in all material respects our financial condition, results of operations and cash flows for the periods presented.

Changes in Internal Control Over Financial Reporting

Except as noted in the preceding paragraphs, there were no changes in our internal control over financial reporting that occurred during the six months ended June 30, 2015, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1.   Legal Proceedings

During the six months ended June 30, 2015, we were not a party to legal proceedings that could have a material affect on our consolidated financial position, results of operations or cash flows.

Item 1A. Risk Factors

An investment in our securities involves a risk of loss. You should carefully consider the information set forth in this Quarterly Report on Form 10-Q and in the section titled “Risk Factors” included in our Annual Report on Form 10-K for the year ended December 31, 2014. There have been no material changes to the Risk Factors described in our 2014 Annual Report on Form 10-K. 

Item 6. Exhibits

* Filed herewith 

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Ekso Bionics Holdings, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.