As filed with the Securities and Exchange Commission on January 16,June 24, 2015

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FormFORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

INTERNATIONAL STEM CELL CORPORATION

(Exact name of registrant as specified in its charter)

5950 Priestly Drive

Carlsbad, CA 92008

(760) 940-6383

(Address and telephone number of principal executive offices)

JAY NOVAKRuslan A. Semechkin

Chief FinancialScientific Officer

5950 Priestly Drive

Carlsbad, CA 92008

(760) 653-1126940-6383

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

Copies to:

DOUGLAS REIN

RYAN GUNDERSON

DLA PIPER LLP (US)

4365 Executive Drive, Suite 1100

San Diego, CA 92121-2133

(858) 677-1443

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement, determined by the selling stockholder.statement.

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 check the following box.  x

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, 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. (Check one):

CALCULATION OF REGISTRATION FEE

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 this Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. The selling stockholdersWe may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting offersan offer to buy these securities in any state where the offer or sale of these securities is not permitted.

SUBJECT TO COMPLETION, DATED JANUARY 16,JUNE 24, 2015

PRELIMINARY PROSPECTUS

INTERNATIONAL STEM CELL CORPORATION

116,333,178Up to              Shares of Common Stock

Warrants to Purchase              Shares

             Shares issuable upon exercise of Warrants

This prospectus relatesWe are offering shares of common stock and warrants to the resalepurchase shares of up to 116,333,178common stock in this offering. We are offering              shares of our common stock by the selling stockholders named herein. On October 7, 2014, we entered into a securitiesand warrants to purchase agreement with Sabby Healthcare Volatility Master Fund, Ltd., Sabby Volatility Warrant Master Fund, Ltd., and Andrey and Ruslan Semechkin, the Company’s Chief Executive Officer and Co-Chairman and Chief Scientific Officer and Director, respectively, (together, the “Purchasers”), pursuant to which we sold to the Purchasers (i) a total of 2,500              shares of our Series H-1 and Series H-2 Convertible Preferred Stock, par value $0.001 with a stated value of $1,000 per share (collectively,common stock. The warrants are issued separately from the “Series H Preferred Stock”), (ii) Series A Warrants (the “Series A Warrants”) to purchase up to 38,777,726 shares of common stock forand will have a term of 5 ¹⁄₂ years, (iii) Series B warrants (the “Series B Warrants”) to purchase up to 38,777,726 shares of common stock for a term of six months, and (iv) Series C warrants (the “Series C Warrants”, together with the Series A Warrants and the Series B Warrants, collectively, the “Warrants”) to purchase up to 38,777,726 shares of common stock for a term of twelve months. As a result of adjustment provisions applicable to the Series H Preferred Stock and the Warrants, the current conversion price for the Series H Preferred Stock andper share exercise price of $        . The warrants are exercisable              and will expire              years from the Warrants is $0.0576 per share, which is subject to further adjustment. Pursuant todate of issuance. Offers will be solicited only from persons who qualify as “institutional investors” under the termslaws of their state of domicile or residence. Our officers and their affiliates may purchase a portion of the registration rights agreement,securities being offered hereby on the same terms as amended, we entered into with the Purchasers; we are required to register the number of shares of common stock underlying the Warrants and any shares of common stock that have been issued on any exercise of the Warrants. To the extent that one or more Purchasers elects to exercise their respective Warrants to acquire shares of our common stock, this prospectus may be used by the selling stockholders named under the section titled “Selling Stockholders” to resell their shares. One holder of Series B Warrants has exercised his warrants and acquired 5,894,214 shares of common stock, which shares are included in the registration statement of which this prospectus is a part. We are not selling any securities under this prospectus and will not receive any of the proceeds from the sale of shares by any selling stockholder; however, we will receive proceeds upon exercise of the Warrants.

The selling stockholders may sell their respective shares of common stock described in this prospectus in a number of different ways and at varying prices. We provide more information about how the selling stockholders may resell their respective shares of our common stock in the section titled “Plan of Distribution” beginning on page 62. Each selling stockholder may be deemed to be an “underwriter” within the meaning of the Securities Act in connection with such sales within the meaning of the Securities Act of 1933, as amended, with respect to any shares resold under this prospectus by such selling stockholder. Although we will pay the expenses incurred in registering the shares, we will not be paying any underwriting discounts or commissions, brokerage commissions or other sales expenses in connection with the resale of the shares.

We will pay the expenses incurred in registering the shares, including legal and accounting fees. See “Plan of Distribution.”unaffiliated purchasers.

Our common stock is quoted on the OTC QB and trades under the symbol “ISCO”. The last reported sale price of our common stock on January 15,June 23, 2015 on the OTC QB was $0.06$0.05 per share.

We have engaged H.C. Wainwright & Co., LLC (“Wainwright” or the “Placement Agent”) to act as our exclusive placement agent in connection with this offering. Wainwright is not purchasing or selling the securities offered by us, and is not required to sell any specific number or dollar amount of securities, but will use its reasonable best efforts to arrange for the sale of the securities offered. We have agreed to pay Wainwright a placement fee equal to 10% of the aggregate gross proceeds to us from the sale of the securities in the offering (excluding gross proceeds from sales to our employees or affiliates of the Semechkin family), plus additional compensation as set forth under “Plan of Distribution”. Wainwright may engage one or more sub-agents or selected dealers in connection with this offering. We estimate total expenses of this offering, excluding the placement agent fees, will be approximately $        . Because there is no minimum offering amount required as a condition to closing in this offering, the actual public offering amount, placement agent fees, and proceeds to us, if any, are not presently determinable and may be substantially less than the total maximum offering amounts set forth above. This offering will terminate on                     , 2015, unless the offering is fully subscribed before that date or we decide to terminate the offering prior to that date. In either event, the offering may be closed without further notice to you. We have not arranged to place the funds from investors in an escrow, trust or similar account.

Delivery of the shares of common stock is expected to be made on or about                     , 2015, subject to customary closing conditions.

Investing in our securities involves a high degree of risk. Before buying any securities, you should read the discussion of material risks of investing in our common stock under the heading “Risk Factors” beginning on page 65 of this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

H. C. Wainwright & Co.

The date of this prospectus is                     , 2015.

INTERNATIONAL STEM CELL CORPORATION

TABLE OF CONTENTS

You should read this prospectus, together with additional information described under “Where You Can Find More Information”.

About This Prospectus

You should rely only on the information contained in this prospectus provided to you in connection with this offering.prospectus. We have not and the Purchasers have not, authorized any other personanyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus is not an offer to sell, nor purchasers are seeking an offer to buy, securities in any state where the offer or solicitation is not permitted. The information contained in this prospectus is complete and accurate as of the date on the front cover of this prospectus. You should assume that the information appearing in this prospectus is accurate only as of the date on the front cover of this prospectus. Our business, financial condition, results of operations and prospects may have changed since thatsuch date. NeitherOther than as required under the deliveryfederal securities laws, we undertake no obligation to publicly update or revise such information, whether as a result of new information, future events or any other reason.

The distribution of this prospectus nor any sale madeand the offering of our securities in certain jurisdictions may be restricted by law. This prospectus does not constitute, and may not be used in connection with, this prospectus shall, underan offer or solicitation by anyone in any circumstances, createjurisdiction in which such offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so to any implication that there has been no change in our affairs sinceperson to whom it is unlawful to make such offer or solicitation. See the date“Plan of Distribution” section of this prospectus or that the information contained by reference to this prospectus is correct as of any time after its date.beginning on page 67. In this prospectus, references to “the Company,” “we,” “us,” and “our,” refer to International Stem Cell Corporation.

RISK FACTORS

You should carefully consider the risks described below as well as other information provided to you in this document, including information in the section of this document entitled “Forward Looking Statements”. If any of the following risks actually occur, our business, financial condition or results of operations could be materially adversely affected, the value of our common stock could decline, and you may lose all or part of your investment.

Risks Related to Our Business

Our business is at an early stage of development and we may not develop therapeutic products that can be commercialized.

Our business is at an early stage of development. We do not have any products in late stagehuman clinical trials. We are still in the early stages of identifying and conducting research on potential therapeutic products. Our potential therapeutic products will require significant research and development and preclinical and clinical testing prior to regulatory approval in the United States and other countries. We may not be able to obtain regulatory approvals, enter clinical trials for any of our product candidates, or commercialize any products. Our product candidates may prove to have undesirable and unintended side effects or other characteristics adversely affecting their safety, efficacy or cost effectiveness that could prevent or limit their use. Any product using any of our technology may fail to provide the intended therapeutic benefits, or achieve therapeutic benefits equal to or better than the standard of treatment at the time of testing or production.

We have a history of operating losses, do not expect to be profitable in the nearforeseeable future and our independent registered public accounting firm has expressed doubt as to our ability to continue as a going concern.

We have not generated any profits since our entry into the biotechnology business and have incurred significant operating losses. We expect to incur additional operating losses for the foreseeable future and, as we increase our research and development activities, we expect our operating losses to increase significantly. Our commercial businesses have not generated revenues in amounts to support our research and development efforts, and we may not achieve that level of revenues in the foreseeable future.

We have expended substantial funds to develop our technologies, products and product candidates. Based on our financial condition, recurring losses and projected spending, which raise substantial doubtsdoubt about our ability to continue as a going concern, our independent registered public accounting firm included an explanatory paragraph in its report on our consolidated financial statements as of and for the year ended December 31, 20132014 regarding this uncertainty. The inclusion of the going concern statement by our auditors may adversely affect our stock price and our ability to raise needed capital or enter into advantageous contractual relationships with third parties. If we were unable to continue as a going concern, the values we receive for our assets on liquidation or dissolution could be significantly lower than the values reflected in our financial statements.

We will need additional capital to conduct our operations and develop our products and our ability to obtain the necessary funding is uncertain.

During 2013,the three months ended March 31, 2015, we used a significant amount of cash to finance the continued development and testing of our product candidates, and we need to obtain significant additional capital resources in order to develop products going forward. Our burn rate as offor the third quarter ended September 30, 2014March 31, 2015 was approximately $495,000$255,000 per month excluding capital expenditures and patent costs averaging $83,000$56,000 per month. We may not be successful in maintaining our normal operating cash flow and the timing of our capital expenditures may not result in cash flows sufficient to sustain our operations through the next twelve months. If financing is not sufficient and additional financing is not available or available only on terms that are detrimental to our long-term survival, it could have a major adverse effect on our ability to continue to function. The timing and degree of any future capital requirements will depend on many factors, including:

Additional financing through strategic collaborations, public or private equity or debt financings or other financing sources may not be available on acceptable terms, or at all. Additional equity financing could result in significant dilution to our stockholders, and any debt financings will likely involve covenants restricting our business activities. Additional financing may not be available on acceptable terms, or at all. Further, if we obtain additional funds through arrangements with collaborative partners, these arrangements may require us to relinquish rights to some of our technologies, product candidates or products that we would otherwise seek to develop and commercialize on our own. If sufficient capital is not available, we may be required to delay, reduce the scope of or eliminate one or more of our research or product development initiatives, any of which could have a material adverse effect on our financial condition or business prospects.

Additionally, currently the U.S. government, through National Institute of Health appropriations restrictions, prevents federal funding to be used to create new embryonic and parthenogenetic stem cells, so access to grants from the NIH are limited.

We have limited clinical testing and regulatory capabilities, and human clinical trials are subject to extensive regulatory requirements, very expensive,time-consuming and difficult to design and implement. Our products may fail to achieve necessary safety and efficacy endpoints during clinical trials, which may limit our ability to generate revenues from therapeutic products.

Due to the relatively early stage of our therapeutic products and stem celltherapy-based systems, we have not yet invested significantly in clinical testing and regulatory capabilities, including for human clinical trials. We cannot assure you that we will be able to investobtain or develop resources for these capabilities successfully or as expediently as necessary. In particular, human clinical trials can be very expensive and difficult to design and implement, in part because they are subject to rigorous regulatory requirements. The clinical trial process is time consuming. We estimate that clinical trials of our product candidates will take at least several years to complete. Furthermore, failure can occur at any stage of the trials, and we could encounter problems that cause us to abandon or repeat clinical trials. The commencement and completion of clinical trials may be affected by several factors, including:

In addition, we or the FDArelevant regulatory authorities may suspend our clinical trials at any time if it appears that we are exposing participants to unacceptable health risks or if the FDA findsrelevant regulatory authorities find deficiencies in our INDregulatory submissions or the conduct of these trials.

Patents held by other persons may result in infringement claims against us that are costly to defend and which may limit our ability to use the disputed technologies and prevent us from pursuing research and development or commercialization of potential products.

A number of pharmaceutical, biotechnology and other companies, universities and research institutions have filed patent applications or have been issued patents relating to cell therapy, stem cells, and other technologies potentially relevant to or required by our expected products. We cannot predict which, if any, of such applications will issue as patents or the claims that might be allowed. We are aware that a number of companies have filed applications relating to stem cells. We are also aware of a number of patent applications and patents claiming use of stem cells and other modified cells to treat disease, disorder or injury.

If third party patents or patent applications contain claims infringed by either our licensed technology or other technology required to make and use our potential products and such claims are ultimately determined to be valid, we might not be able to obtain licenses to these patents at a reasonable cost, if at all, or be able to develop or obtain alternative technology. If we are unable to obtain such licenses at a reasonable cost, we may not be able to develop some products commercially. We may be required to defend ourselves in court against allegations of infringement of third party patents. Patent litigation is very expensive and could consume substantial resources and create significant uncertainties. An adverse outcome in such a suit could subject us to significant liabilities to third parties, require disputed rights to be licensed from third parties, or require us to cease using such technology.

Our competition includes fully integrated biotechnology, pharmaceutical and cosmetic companies that have significant advantages over us.

The marketmarkets for therapeutic stem cell products isand cosmetic products are highly competitive. We expect that our most significant competitors will be fully integrated and more established pharmaceutical, biotechnology and cosmetic companies. These companies are developing stemcell-based products and they have significantly greater capital resources and research and development, manufacturing, testing, regulatory compliance, and marketing capabilities. Many of these potential competitors are further along in the process of product development and also operate large,company-funded research and development programs. As a result, our competitors may develop more competitive or affordable products, or achieve earlier patent protection or product commercialization than we are able to achieve. Competitive products may render any products or product candidates that we develop obsolete.

If competitors develop and market products that are more effective, safer, or less expensive than our product candidates or offer other advantages, our commercial prospects will be limited.

Our cell therapy development programs face, and will continue to face, intense competition from pharmaceutical, biopharmaceutical and biotechnology companies, as well as numerous academic and research institutions and governmental agencies engaged in drug discovery activities or funding, both in the United States and abroad. Some of these competitors are pursuing the development of drugs and other therapies that target the same diseases and conditions that we are targeting with our product candidates.

As a general matter, we also face competition from many companies that are researching and developing cell therapies. Many of these companies have financial and other resources substantially greater than ours. In addition, many of these competitors have significantly greater experience in testing pharmaceutical and other therapeutic products, obtaining FDA and other regulatory approvals, and marketing and selling. If we ultimately obtain regulatory approval for any of our product candidates, we also will be competing with respect to manufacturing efficiency and marketing capabilities, areas in which we have limited or nocommercial-scale experience. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated by our competitors. Competition may increase further as a result of advances made in the commercial applicability of our technologies and greater availability of capital for investment in these fields.

If we fail to meet our obligations under our license agreements, we may lose our rights to key technologies on which our business depends.

Our business depends in part on licenses from third parties. These third party license agreements impose obligations on us, such as payment obligations and obligations to diligently pursue development of commercial products under the licensed patents. If a licensor believes that we have failed to meet our obligations under a license agreement, the licensor could seek to limit or terminate our license rights, which could lead to costly and time consuming litigation and, potentially, a loss of the licensed rights. During the period of any such litigation, our ability to carry out the development and commercialization of potential products could be significantly and negatively affected. If our license rights were restricted or ultimately lost, our ability to continue our business based on the affected technology platform could be severely affected adversely.

Significant delays or reductions in U.S. Government funding may negatively affect our results of operations.

We estimate that governmental funding, either directly or indirectly (through sponsorship of academic research), comprises approximately 40% of the market for basic and applied research in biological sciences, which is the target market for our primary human cellLCT research products. The U.S. Government is considering (and has implemented in the recent past) significant changes in government spending and other governmental programs, withwhich in the recent past involved several automatic spending cuts being implemented. There are many variables in how these laws could be implemented in the future that make it difficult to determine specific impacts on our customers, and we are unable to predict the impact that thesefuture automatic spending cuts would have on funding our customers receive.receive and resulting sales of our LCT products. Additionally, U.S. Governmental programs are subject to annual congressional budget authorization and appropriation processes. However, whether through the automatic cuts or other decisions,long-term funding for certain programs in which our research product customers participate may be reduced, delayed or cancelled. In the event that governmental funding for any of our research product customers is reduced or delayed, our sales to those customers would likely suffer, which could have a material adverse effect on our results of operations. Further, currently the U.S. government, through National Institute of Health appropriations restrictions, prevents federal funding to be used to create new embryonic and parthenogenetic stem cells, so access to grants from the NIH are limited, which may adversely affect our partnering opportunities and internal therapeutic product development initiatives.

Restrictive and extensive government regulation could slow or hinder our production of a cellular product.

The research and development of stem cell therapies is subject to and restricted by extensive regulation by governmental authorities in the United States and other countries. The process of obtaining FDA and other necessary regulatory approvals is lengthy, expensive and uncertain. We may fail to obtain the necessary approvals to continue our research and development, which would hinder our ability to manufacture or market any future product.

The development and commercialization of our product candidates is subject to extensive regulation by the FDA and other regulatory agencies in the United States and abroad, and the failure to receive regulatory approvals for our other product candidates would likely have a material and adverse effect on our business and prospects.

The process of obtaining FDA and other regulatory approvals is expensive, generally takes many years and is subject to numerous risks and uncertainties, particularly with complex and/or novel product candidates such as our product candidates. Changes in regulatory approval policies during the development period, changes in or the enactment of additional statutes or regulations, or changes in regulatory review for each submitted product application, may cause delays in the approval or rejection of an application or may make it easier for our competitors to gain regulatory approval to enter the marketplace. Ultimately, the FDA and other regulatory agencies have substantial discretion in the approval process and may refuse to accept any application or may decide that our product candidate data are insufficient for approval without the submission of additional preclinical, clinical or other studies. In addition, varying agency interpretations of the data obtained from

preclinical and clinical testing could delay, limit or prevent regulatory approval of a product candidate. Any regulatory approval we ultimately obtain may be limited or subject to restrictions orpost-approval commitments that render the approved product not commercially viable.

Any of the following factors, among others, could cause regulatory approval for our product candidates to be delayed, limited or denied:

Any difficulties or failures that we encounter in securing regulatory approval for our product candidates would likely have a substantial adverse impact on our ability to generate product sales, and could make any search for a collaborative partner more difficult.

Research in the field of embryonic stem cells is currently subject to strict government regulations, and our operations could be restricted or outlawed by any legislative or administrative efforts impacting the use of nuclear transfer technology or human embryonic material.

Significant portions of our business are focused on human cell therapy, which includes the production of human differentiated cells from stem cells and involves human oocytes. Although our focus is on parthenogenetic stem cells derived from unfertilized oocytes, certain aspects of that work may involve the use of embryonic stem cells. Research utilizing embryonic stem cells is controversial, and currently subject to intense scrutiny, particularly in the area of the use of human embryonic material.

Federal law is not as restrictive regarding the use of federal funds for human embryonic cell research, commonly referred to as hES cell research as it once was. However, federal law does prohibit federal funding for creation of parthenogenetic stem cells. Our operations may also be restricted by future legislative or administrative efforts by politicians or groups opposed to the development of hES cell technology, parthenogenetic cell technology or nuclear transfer technology. Further, future legislative or administrative restrictions could, directly or indirectly, delay, limit or prevent the use of hES technology, parthenogenetic technology, or nuclear transfer technology, the use of human embryonic material, or the sale, manufacture or use of products or services derived from nuclear transfer technology or hES or parthenogenetic technology.

We may be unsuccessful in our efforts to comply with applicable federal, state and international laws and regulations, which could result in loss of licensure, certification or accreditation or other government enforcement actions or impact our ability to secure regulatory approval of our product candidates.

Although we seek to conduct our business in compliance with applicable governmental healthcare laws and regulations, these laws and regulations are exceedingly complex and often subject to varying interpretations. The cell therapy industry is the topic of significant government interest, and thus the laws and regulations applicable to our business are subject to frequent change and/or reinterpretation. As such, there can be no assurance that we will be able, or will have the resources, to maintain compliance with all such healthcare laws and regulations. Failure to comply with such healthcare laws and regulations, as well as the costs associated with such compliance or with enforcement of such healthcare laws and regulations, may have a material adverse effect on our operations or may require restructuring of our operations or impair our ability to operate profitably.

Our manufacture of certain cellular therapy products triggers additional FDA requirements applicable to hESCs which are regulated as a drug, biological product, or medical device. FDA’s GMP regulations govern the manufacture, processing, packaging and holding of cell therapy products regulated as drugs. FDA’s Quality System Regulation, or QSR, similarly governs the manufacture, processing, packaging and holding of cell therapy products regulated as medical devices. We must comply with GMP or QSR requirements including quality control, quality assurance and the maintenance of records and documentation for certain products. We may be unable to comply with these GMP or QSR requirements and with other FDA, state and foreign regulatory requirements. These requirements may change over time and we orthird-party manufacturers may be unable to comply with the revised requirements.

We will continue to be subject to extensive FDA regulation following any product approvals, and if we fail to comply with these regulations, we may suffer a significant setback in our business.

Even if we are successful in obtaining regulatory approval of our product candidates, we will continue to be subject to the requirements of and review by, the FDA and comparable regulatory authorities in the areas of manufacturing processes,post-approval clinical data, adverse event reporting, labeling, advertising and promotional activities, among other things. In addition, any marketing approval we receive may be limited in terms of the approved product indication or require costlypost-marketing testing and surveillance. Discovery after approval of previously unknown problems with a product, manufacturer or manufacturing process, or a failure to comply with regulatory requirements, may result in actions such as:

The occurrence of any of these actions would likely cause a material adverse effect on our business, financial condition and results of operations.

Health care companies have been the subjects of federal and state investigations, and we could become subject to investigations in the future.

Both federal and state government agencies have heightened civil and criminal enforcement efforts. There are numerous ongoing investigations of health care companies, as well as their executives and managers. In addition, amendments to the Federal False Claims Act, have made it easier for private parties to bring “qui tam” (whistleblower) lawsuits against companies under which the whistleblower may be entitled to receive a percentage of any money paid to the government. The Federal False Claims Act provides, in part, that an action can be brought against any person or entity that has knowingly presented, or caused to be presented, a false or fraudulent request for payment from the federal government, or who has made a false statement or used a false record to get a claim approved. The government has taken the position that claims presented in violation of the federal anti-kickback law, Stark Law or other healthcare-related laws, including laws enforced by the FDA, may be considered a violation of the Federal False Claims Act. Penalties include substantial fines for each false claim, plus three times the amount of damages that the federal government sustained because of the act of that person or entity and/or exclusion from the Medicare program. In addition, a majority of states have adopted similar state whistleblower and false claims provision. Any future investigations of our business or executives could cause us to incur substantial costs, and result in significant liabilities or penalties, as well as damage to our reputation.

Restrictions on the use of human stem cells, and the ethical, legal and social implications of that research, could prevent us from developing or gaining acceptance for commercially viable products in these areas.

Although our stem cells are derived from unfertilized human eggs through a process called “parthenogenesis” that can produce cells suitable for therapy, but are believed to be incapable of producing a human being, such cells are nevertheless often incorrectly referred to as “embryonic” stem cells. Because the use of human embryonic stem cells gives rise to ethical, legal and social issues regarding the appropriate use of these cells, our research related to human parthenogenetic stem cells could become the subject of adverse commentary or publicity and some political and religious groups may still raise opposition to our technology and practices. In addition, many research institutions, including some of our scientific collaborators, have adopted policies regarding the ethical use of human embryonic tissue, which, if applied to our procedures, may have the effect of limiting the scope of research conducted using our stem cells, thereby impairing our ability to conduct research in this field. In some states, use of embryos as a source of stem cells is prohibited.

To the extent we utilize governmental grants in the future, the governmental entities involved may retain certain rights in technology that we develop using such grant money and we may lose the revenues from such technology if we do not commercialize and utilize the technology pursuant to established government guidelines.

Certain of our licensors’ research have been or are being funded in part by government grants. Our research may also begovernment-funded in the future. In connection with certain grants, the governmental entity involved retains various rights in the technology developed with the grant. These rights could restrict our ability to fully

capitalize upon the value of this research by reducing total revenues that might otherwise be available since such governmental rights may give the government the right to practice the invention without payment of royalties if we do not comply with applicable requirements.

We rely on parthenogenesis, cell differentiation and other stem cell technologies that we may not be able to successfully develop, which may prevent us from generating revenues, operating profitably or providing investors any return on their investment.

We have concentrated our research on our parthenogenesis, cell differentiation and stem cell technologies, and our ability to operate profitably will depend on being able to successfully implement or develop these technologies for human applications. These are emerging technologies with, as yet, limited human applications. We cannot guarantee that we will be able to successfully implement or develop our nuclear transfer, parthenogenesis, cell differentiation and other stem cell technologies or that these technologies will result in products or services with any significant commercial utility. We anticipate that the commercial sale of such products or services, and royalty/licensing fees related to our technology, would be an additional source of revenues.

The outcome of preclinical, clinical and product testing of our products is uncertain, and if we are unable to satisfactorily complete such testing, or if such testing yields unsatisfactory results, we may be unable to commercially produce our proposed products.

Before obtaining regulatory approvals for the commercial sale of any potential human products, our products will be subjected to extensive preclinical and clinical testing to demonstrate their safety and efficacy in humans. The clinical trials of our prospective products, or those of our licensees or collaborators, may not demonstrate the safety and efficacy of such products at all, or to the extent necessary to obtain appropriate regulatory approvals. Similarly, the testing of such prospective products may not be completed in a timely manner, if at all, or only after significant increases in costs, program delays or both, all of which could harm our ability to generate revenues. In addition, our prospective products may not prove to be more effective for treating disease or injury than current therapies. Accordingly, we may have to delay or abandon efforts to research, develop or obtain regulatory approval to market our prospective products. The failure to adequately demonstrate the safety and efficacy of a therapeutic product under development could delay or prevent regulatory approval of the product and could harm our ability to generate revenues, operate profitably or produce any return on an investment in us.

Even if we are successful in developing a therapeutic application using our cell technologies, it is unclear whether cell therapy can serve as the foundation for a commercially viable and profitable business.

Stem cell technology is rapidly developing and could undergo significant change in the future. Such rapid technological development could result in our technologies becoming obsolete. While our product candidates appear promising, they may fail to be successfully commercialized for numerous reasons, including, but not limited to, competing technologies for the same indications. There can be no assurance that we will be able to develop a commercially successful therapeutic application for our stem cell technologies.

Moreover, advances in other treatment methods or in disease prevention techniques could significantly reduce or entirely eliminate the need for our cell therapy services, planned products and therapeutic efforts. There is no assurance that cell therapies will achieve the degree of success envisioned by us in the treatment of disease. Additionally, technological or medical developments may materially alter the commercial viability of our technology or services, and require us to incur significant costs to replace or modify equipment in which we have a substantial investment. We are focused on cell therapy, and if this field is substantially unsuccessful, this could jeopardize our success or future results. The occurrence of any of these factors may have a material adverse effect on our business, operating results and financial condition.

If we are unable to keep up with rapid technological changes in our field or compete effectively, we will be unable to operate profitably.

We are engaged in activities in the biotechnology field, which is characterized by extensive research efforts and rapid technological progress. If we fail to anticipate or respond adequately to technological developments,

our ability to operate profitably could suffer. Research and discoveries by other biotechnology, agricultural, pharmaceutical or other companies may render our technologies or potential products or services uneconomical or result in products superior to those we develop. Similarly, any technologies, products or services we develop may not be preferred to any existing or newly developed technologies, products or services.

We may not be able to protect our proprietary technology, which could harm our ability to operate profitably.

The biotechnology, cosmeceutical,cosmetic, and pharmaceutical industries place considerable importance on obtaining patent and trade secret protection for new technologies, products and processes. Our success will depend, to a substantial degree, on our ability to obtain and enforce patent protection for our products, preserve any trade secrets and operate without infringing the proprietary rights of others. We cannot assure you that:

We are aware of certain patents that have been granted to others and certain patent applications that have been filed by others with respect to nuclear transfer and other stem cell technologies. The fields in which we operate have been characterized by significant efforts by competitors to establish dominant or blocking patent rights to gain a competitive advantage, and by considerable differences of opinion as to the value and legal legitimacy of competitors’ purported patent rights and the technologies they actually utilize in their businesses.

Considerable research in the areas of stem cells, cell therapeutics and regenerative medicine is being performed in countries outside of the United States, and a number of our competitors are located in those countries. The laws protecting intellectual property in some of those countries may not provide adequate protection to prevent our competitors from misappropriating our intellectual property.

Our business is highly dependent upon maintaining licenses with respect to key technology.technologies.

Although our primary focus relates to intellectual property we have developed internally, some of the patents we utilize are licensed to us by Advanced Cell Technology,Ocata, which has licensed some of these from other parties, including the University of Massachusetts. These licenses are subject to termination under certain circumstances (including, for example, our failure to make minimum royalty payments). The loss of any of such licenses, or the conversion of such licenses tonon-exclusive licenses, could harm our operations and/or enhance the prospects of our competitors.

Although our licenses with Advanced Cell TechnologyOcata allow us to cure any defaults under the underlying licenses to them and to take over the patents and patents pending in the event of default by Advanced Cell Technology,Ocata, the cost of such remedies could be significant and we might be unable to adequately maintain these patent positions. If so, such inability could have a material adverse effect on our business. Some of these licenses also contain restrictions (e.g.(e.g., limitations on our ability to grant sublicenses) that could materially interfere with our ability to generate revenue through the licensing or sale to third parties of important and valuable technologies that we have, for strategic reasons, elected not to pursue directly. In the future we may require further licenses to complete and/or commercialize our proposed products. We may not be able to acquire any such licenses on acommercially-viable basis.

Cybersecurity breaches could expose us to liability, damage our reputation, compromise our confidential information or otherwise adversely affect our business.

We maintain sensitive company data on our computer networks, including our intellectual property and proprietary business information, as well as certain personal information regarding customers who purchase our skin care products online. We face a number of threats to our networks from unauthorized access, security breaches and other system disruptions. Despite our security measures, our infrastructure may be vulnerable to attacks by hackers or other disruptive problems. Any such security breach may compromise information stored on our networks and may result in significant data losses or theft of our intellectual property, proprietary business information or our customers’ personally identifiable information. A cybersecurity breach could hurt our reputation by adversely affecting the perception of customers and potential customers of the security of their orders and personal information. In addition, a cybersecurity attack could result in other negative consequences, including disruption of our internal operations, increased cyber security protection costs, lost revenues or litigation.

Certain of our technology may not be subject to protection through patents, which leaves us vulnerable to theft of our technology.

Certain parts of ourknow-how and technology are not patentable or are trade secrets. To protect our proprietary position in suchknow-how and technology, we intend to require all employees, consultants, advisors and collaborators to enter into confidentiality and invention ownership agreements with us. These agreements may not provide meaningful protection for our trade secrets,know-how or other proprietary information in the event of any unauthorized use or disclosure. Further, in the absence of patent protection, competitors who independently develop substantially equivalent technology may harm our business.

We depend on our collaborators to help us develop and test our proposed products, and our ability to develop and commercialize products may be impaired or delayed if collaborations are unsuccessful.

Our strategy for the development, clinical testing and commercialization of our proposed products requires that we enter into collaborations with corporate partners, licensors, licensees and others.others, none of which are presently in effect. We are dependent upon the subsequent success of these other parties in performing their respective responsibilities and the continued cooperation of our partners. Our collaborators may not cooperate with us or perform their obligations under our agreements with them. We cannot control the amount and timing of our collaborators’ resources that will be devoted to our research and development activities related to our collaborative agreements with them. Our collaborators may choose to pursue existing or alternative technologies in preference to those being developed in collaboration with us.

Under agreements with collaborators, we may rely significantly on such collaborators to, among other things:

The development and commercialization of potential products will be delayed if collaborators fail to conduct these activities in a timely manner, or at all. In addition, our collaborators could terminate their agreements with us and we may not receive any development or milestone payments. If we do not achieve milestones set forth in the agreements, or if our collaborators breach or terminate their collaborative agreements with us, our business may be materially harmed.

Contractual arrangements with licensors or collaborators may require us to pay royalties or make other payments related to the development of a product candidate, which would adversely affect the level of our future revenues and profits.

Even if we obtain all applicable regulatory approvals and successfully commercialize one or more of our cell therapy candidates, contractual arrangements between us and a licensor, collaborator or other third party in connection with the respective product may require that we make royalty or other payments to the respective third party, and as a result we would not receive all of the revenue derived from commercial sales of such product.

Our reliance on the activities of ournon-employee consultants, research institutions, and scientific contractors, whose activities are not wholly within our control, may lead to delays in development of our proposed products.

We rely extensively upon and have relationships with scientific consultants at academic and other institutions, some of whom conduct research at our request, and other consultants with expertise in clinical development strategy or other matters. These consultants are not our employees and may have commitments to, or consulting or advisory contracts with, other entities that may limit their availability to us. We have limited control over the activities of these consultants and, except as otherwise required by our collaboration and consulting agreements to the extent they exist, can expect only limited amounts of their time to be dedicated to our activities. These research facilities may have commitments to other commercial andnon-commercial entities. We have limited control over the operations of these laboratories and can expect only limited amounts of time to be dedicated to our research goals.

We may be subject to litigation that will be costly to defend or pursue and uncertain in its outcome.

Our business may bring us into conflict with our licensees, licensors or others with whom we have contractual or other business relationships, or with our competitors or others whose interests differ from ours. If we are unable to resolve those conflicts on terms that are satisfactory to all parties, we may become involved in litigation brought by or against us. That litigation is likely to be expensive and may require a significant amount of management’s time and attention, at the expense of other aspects of our business. The outcome of litigation is always uncertain, and in some cases could include judgments against us that require us to pay damages, enjoin us from certain activities, or otherwise affect our legal or contractual rights, which could have a significant adverse effect on our business.

We may not be able to obtain third party patient reimbursement or favorable product pricing, which would reduce our ability to operate profitably.

Our ability to successfully commercialize certain of our proposed products in the human therapeutic field may depend to a significant degree on patient reimbursement of the costs of such products and related treatments at acceptable levels from government authorities, private health insurers and other organizations, such as health maintenance organizations. Reimbursement in the United States or foreign countries may not be available for any products we may develop, and, if available, may be decreased in the future. Also, reimbursement amounts may reduce the demand for, or the price of, our products with a consequent harm to our business. We cannot predict what additional regulation or legislation relating to the health care industry or third party coverage and reimbursement may be enacted in the future or what effect such regulation or legislation may have on our business. If additional regulations are overly onerous or expensive, or if health care related legislation makes our business more expensive or burdensome than originally anticipated, we may be forced to significantly downsize our business plans or completely abandon our business model.

Our products may be expensive to manufacture, and they may not be profitable if we are unable to control the costs to manufacture them.

Our products may be significantly more expensive to manufacture than other therapeutic products currently on the market today. We hope to substantially reduce manufacturing costs through process improvements,

development of new methods, increases in manufacturing scale and outsourcing to experienced manufacturers. If we are not able to make these, or other improvements, and depending on the pricing of the product, our profit margins may be significantly less than that of other therapeutic products on the market today. In addition, we may not be able to charge a high enough price for any cell therapy product we develop, even if they are safe and effective, to make a profit. If we are unable to realize significant profits from our potential product candidates, our business would be materially harmed.

We presently lack sufficient manufacturing capabilities to produce our therapeutic product candidates at commercial scale quantities and do not have an alternate manufacturing supply, which could negatively impact our ability to meet any future demand for the product.

We expect that we would need to significantly expand our manufacturing capabilities to meet potential demand for our therapeutic product candidates, if approved. Such expansion would require additional regulatory approvals. Even if we increase our manufacturing capabilities, it is possible that we may still lack sufficient capacity to meet demand.

We do not presently have any alternate supply for our products. If our facilities where our products are currently being manufactured or equipment were significantly damaged or destroyed, or if there were other disruptions, delays or difficulties affecting manufacturing capacity, including if such facilities are deemed not in compliance with current Good Manufacturing Practice (“GMP”) requirements, future clinical studies and commercial production for our products would likely be significantly disrupted and delayed. It would be both time consuming and expensive to replace this capacity with third parties, particularly since any new facility would need to comply with the regulatory requirements.

Ultimately, if we are unable to supply our products to meet commercial demand, whether because of processing constraints or other disruptions, delays or difficulties that we experience, our production costs could dramatically increase and sales of the product and itslong-term commercial prospects could be significantly damaged.

To be successful, our proposed products must be accepted by the health care community, which can be very slow to adopt or unreceptive to new technologies and products.

Our proposed products and those developed by our collaborative partners, if approved for marketing, may not achieve market acceptance since hospitals, physicians, patients or the medical community in general may decide not to accept and utilize these products. The products that we are attempting to develop represent substantial departures from established treatment methods and will compete with a number of more conventional therapies manufactured and marketed by major pharmaceutical companies. The degree of market acceptance of any of our developed products will depend on a number of factors, including:

If the healthcare community does not accept our products for any of the foregoing reasons, or for any other reason, our business would be materially harmed.

Our business is based on novel technologies that are inherently expensive, risky and may not be understood by or accepted in the marketplace, which could adversely affect our future value.

The clinical development, commercialization and marketing of cell andtissue-based therapies are at anearly-stage, substantiallyresearch-oriented, and financially speculative. To date, very few companies have been

successful in their efforts to develop and commercialize a stem cell product. In general, stem cell products may be susceptible to various risks, including undesirable and unintended side effects, unintended immune system responses, inadequate therapeutic efficacy, or other characteristics that may prevent or limit their approval or commercial use. Furthermore, the number of people who may use cell ortissue-based therapies is difficult to forecast with accuracy. Our future success is dependent on the establishment of a significant market forcell- andtissue-based therapies and our ability to capture a share of this market with our product candidates.

Our development efforts with our therapeutic product candidates are susceptible to the same risks of failure inherent in the development and commercialization of therapeutic products based on new technologies. The novel nature of cellular therapeutics creates significant challenges in the areas of product development and optimization, manufacturing, government regulation,third-party reimbursement and market acceptance. For example, the United States FDA has relatively limited experience regulating therapies based on cells, and there are few approved treatments utilizing cell therapy.

During the three and nine months ended September 30, 2014,March 31, 2015, we derived approximately 22% and 21%, respectively,14% of our revenues from one customer.

During the three and nine months ended September 30, 2014,March 31, 2015, one customer accounted for 22% and 21%, respectively,14% of our consolidated revenues. To the extent that this significant customer reduces or delays its purchases from us or terminates its relationship with us, our revenues would decline significantly and our financial condition and results of operations would suffer substantially.

We depend on key personnel for our continued operations and future success, and a loss of certain key personnel could significantly hinder our ability to move forward with our business plan.

Because of the specialized nature of our business, we are highly dependent on our ability to identify, hire, train and retain highly qualified scientific and technical personnel for the research and development activities we conduct or sponsor. The loss of one or more key executive officers, or scientific officers, would be significantly detrimental to us. In addition, recruiting and retaining qualified scientific personnel to perform research and development work is critical to our success. Our anticipated growth and expansion into areas and activities requiring additional expertise, such as clinical testing, regulatory compliance, manufacturing and marketing, will require the addition of new management personnel and the development of additional expertise by existing management personnel. There is intense competition for qualified personnel in the areas of our present and planned activities. Accordingly, we may not be able to continue to attract and retain the qualified personnel, which would adversely affect the development of our business.

We may not have sufficient product liability insurance, which may leave us vulnerable to future claims we will be unable to satisfy.

The testing, manufacturing, marketing and sale of human therapeutic products entail an inherent risk of product liability claims. We currently have a limited amount of product liability insurance, which may not be adequate to meet potential product liability claims. In the event we are forced to expend significant funds on defending product liability actions, and in the event those funds come from operating capital, we will be required to reduce our business activities, which could lead to significant losses. Adequate insurance coverage may not be available in the future on acceptable terms, if at all. If available, we may not be able to maintain any such insurance at sufficient levels of coverage and any such insurance may not provide adequate protection against potential liabilities. Whether or not a product liability insurance policy is obtained or maintained in the future, any product liability claim could harm our business or financial condition.

Risks Related to the Securities Markets and Our Capital Structure

Stock prices for biotechnology companies have historically tended to be very volatile.

Stock prices and trading volumes for many biotechnology companies fluctuate widely for a number of reasons, including but not limited to the following factors, some of which may be unrelated to their businesses or results of operations:

This market volatility, as well as general domestic or international economic, market and political conditions, could materially and adversely affect the market price of our common stock.

Two of our executive officers and directors can significantly influence our direction and policies, and their interests may be adverse to the interests of our other stockholders.

As of DecemberMay 31, 2014,2015, Dr. Andrey Semechkin, Chief Executive Officer andCo-Chairman of the Board of Directors, and Dr. Ruslan Semechkin, Chief Scientific Officer of International Stem Cell and a director, beneficially own approximately 55%54% of our outstanding shares of common stock, including shares issuable upon conversion of the outstanding shares of our Series D, Series G and Series HH-2 Preferred Stock and shares issuable upon exercise of options and warrants that they hold.hold and that are exercisable within 60 days of May 31, 2015. As a result of their holdings and the rights, preferences and privileges of those series of preferred stock, Dr. Andrey Semechkin and Dr. Ruslan Semechkin may appoint and remove two of our five directors, and propose candidates for nomination of up to two additional directors, and therefore will be able to significantly influence the election of our Board of Directors. They may also prevent corporate transactions (such as a merger, consolidation, a sale of all or substantially all of our assets or a financing transaction) that may be favorable from the standpoint of our other stockholders or they may cause a transaction that our other stockholders may view as unfavorable.

The application of the “penny stock” rules to our common stock could limit the trading and liquidity of our common stock, adversely affect the market price of our common stock and increase stockholder transaction costs to sell those shares.

As long as the trading price of our common stock is below $5.00 per share, the open market trading of our common stock will be subject to the “penny stock” rules, unless we otherwise qualify for an exemption from the “penny stock” definition. The “penny stock” rules impose additional sales practice requirements on certainbroker-dealers who sell securities to persons other than established customers and accredited investors (generally

those with assets in excess of $1,000,000 or annual income exceeding $200,000 or $300,000 together with their spouse). These regulations, if they apply, require the delivery, prior to any transaction involving a penny stock, of a disclosure schedule explaining the penny stock market and the associated risks. Under these regulations, certain brokers who recommend such securities to persons other than established customers or certain accredited investors must make a special written suitability determination regarding such a purchaser and receive such purchaser’s written agreement to a transaction prior to sale. These regulations may have the effect of limiting the trading activity of our common stock, reducing the liquidity of an investment in our common stock and increasing the transaction costs for sales and purchases of our common stock as compared to other securities.

The rights of holders of our common stock are subordinate to significant rights, preferences and privileges of our existing five series of preferred stock, and to any additional series of preferred stock created in the future.

Under the authority granted by our Certificate of Incorporation, our Board of Directors has established five separate series of outstanding preferred stock, including Series B, Series D, Series G, SeriesH-1 and SeriesH-2 Preferred Stock, which have various rights and preferences senior to the shares of common stock. Shares of our existing preferred stock are also entitled to enhanced voting rights and liquidation preferences. As a result of the various voting rights, the holders of our existing preferred stock may be able to block the proposed approval of various corporate actions, which could prevent us from achieving strategic or other goals dependent on such actions. As a result of the liquidation preferences, in the event that we voluntarily or involuntary liquidate, dissolve or windup our affairs (including as a result of a merger), the holders of our preferred stock would be entitled to receive stated amounts per share, including any accrued and unpaid dividends, before any distribution of assets or merger consideration is made to holders of our common stock. Additionally, these shares of preferred stock may be converted, at the option of the holders, into common stock at rates that may be adjusted, for the benefit of holders of preferred stock, if we sell equity securities below the then existing conversion prices. Any such adjustments would compound the potential dilution suffered by holders of common stock if we issue additional securities at prices below the current conversion prices (ranging from $0.0576$0.0448 to $0.1866$0.1981 per share as of DecemberMay 31, 2014)2015). Additionally, subject to the consent of the holders of our existing preferred stock, our Board of Directors has the power to issue additional series of preferred stock and to designate, as it deems appropriate (subject to the rights of the holders of the current series of preferred stock), the special dividend, liquidation or voting rights of the shares of those additional series. The creation and designation of any new series of preferred stock could adversely affect the voting power, dividend, liquidation and other rights of holders of our common stock and, possibly, any other class or series of stock that is then in existence.

The market price for our common stock has been and may continue to be particularly volatile given our status as a relatively unknown company with a limited operating history and lack of profits, which could lead to wide fluctuations in our share price. The price at which stockholders purchase shares of our common stock may not be indicative of the price of our common stock that will prevail in the trading market.

The market for our common stock may be characterized by significant price volatility when compared to seasoned issuers, and we expect that our stock price could continue to be more volatile than a seasoned issuer for the indefinite future. The potential volatility in our share price is attributable to a number of factors. First, there has been limited trading in our common stock. As a consequence of this lack of liquidity, any future trading of shares by our stockholders may disproportionately influence the price of those shares in either direction. Second, we are a speculative or “risky” investment due to our limited operating history and lack of profits to date, and uncertainty of future market acceptance for our potential products. As a consequence of this enhanced risk, more risk averse investors may, under the fear of losing all or most of their investment in the event of negative news or lack of progress, be more inclined to sell their shares on the market more quickly and at greater discounts than would be the case with the stock of a seasoned issuer. Many of these factors will be beyond our control and may decrease the market price of our common stock, regardless of our operating performance. We cannot make any predictions or projections as to what the prevailing market price for our common stock will be at any time or as to what effect that the sale of shares or the availability of shares for sale at any time will have on the prevailing market price.

In addition, the market price of our common stock could be subject to wide fluctuations in response to:

Shares eligible for future sale may adversely affect the market.

From time to time, certain of our stockholders may be eligible to sell all or some of their shares of common stock by means of ordinary brokerage transactions in the open market pursuant to Rule 144 promulgated under the Securities Act of 1933, as amended, subject to certain limitations. In general, pursuant to Rule 144, a stockholder (or stockholders whose shares are aggregated) who is not an affiliate of our company and who has satisfied a six month holding period may, as long as we are current in our required filings with the SEC, sell securities without further limitation. Rule 144 also permits, under certain circumstances, the sale of securities, without any limitations, by anon-affiliate of our company who has satisfied a one year holding period. Affiliates of our company who have satisfied a six month holding period may sell securities subject to limitations. Any substantial sale of our common stock pursuant to Rule 144 or pursuant to any resale prospectus may have an adverse effect on the market price of our securities. Currently, a substantial majority of our securities are either free trading or subject to the release of trading restrictions under the six month or one year holding periods of Rule 144.

Certain provisions of our Certificate of Incorporation and Delaware law may make it more difficult for a third party to affect achange-in-control.

Our Certificate of Incorporation authorizes the Board of Directors to issue up to 20,000,000 shares of preferred stock and our Board of Directors has created and issued shares of five series of preferred stock that remain outstanding, including Series B, Series D, Series G, SeriesH-1 and SeriesH-2 Preferred Stock. The terms of the Series B, Series D and Series G Preferred Stock include, among other things, voting rights on particular matters (for example, with respect to the Series D Preferred Stock, restricting our ability to undergo a change in control or merge with, or sell assets to, a third party), preferences as to dividends and liquidation, and conversion rights. These preferred stock rights diminish the rights of holders of our common stock, and therefore could reduce the value of such common stock. In addition, as long as shares of our Series B, Series D and Series G Preferred Stock remain outstanding, or if our Board creates and issues additional shares of preferred stock in the future with rights that restrict our ability to merge with, or sell assets to, a third party, it could make it more difficult, delay, discourage, prevent or make it more costly to acquire the Company or affect achange-in-control.

The sale or issuance of our common stock to Purchasersholders of Series H Preferred Stock (“holders”) may cause dilution and the sale of the shares of common stock acquired by Purchasers,those holders, or the perception that such sales may occur, could cause the price of our common stock to fall.

On October 7, 2014, we entered into the Securities Purchase Agreement with two institutional investors and Andrey and Ruslan Semechkin, the Company’s chiefour Chief Executive Officer andCo-Chairman and Chief Scientific Officer and Director, respectively, pursuant to which Purchasersthe purchasers purchased 2,500 shares of Series H Convertible Preferred Stock initially convertible into approximately 38.8 million shares of our common stock, in addition to Series A, B, and C Warrants for approximately 116.3 million shares of our common stock, the Series A Warrants being exercisable for 5 and 1/1 / 2 years from the date of issuance. The conversion price of the Preferred Stock and Warrants is subject to certain resets as set forth in the Certificates of Designation and Warrants, including the

date of the amendment to the certificate of incorporation with respect to theany reverse stock split, the effectiveness dates of the registration statements and the six and twelve month anniversaries of the Closing Date. For example, when the registration statement registering for resale the shares of common stock issuable upon conversion of the Series H Convertible Preferred Stock was declared effective, the conversion price and exercise prices of the Series H Convertible Preferred Stock and Warrants were adjusted to $0.0576 per share and which is subject to further adjustment. Depending on market liquidity at the time, sales of such shares may cause the trading price of our common stock to fall.

PurchasersThe holders may ultimately convert all, some or none of the Series H Convertible Preferred Stock into shares of our common stock, exercise all, some or none of the Series A, B, and C warrants into shares of our common stock. Such shares acquired by the Purchaserssuch holders may be sold, as Purchaserssuch holders may sell all, some or none of those shares. Therefore, the conversion of the preferred stock and exercise of warrants by the Purchaserssuch holders will result in substantial dilution to the interests of other holders of our common stock. Additionally, the conversion into a substantial number of shares of our common stock by Purchasers,such holders, or the anticipation of such conversion, could make it more difficult for us to sell equity orequity-related securities in the future at a time and at a price that we might otherwise wish to effect sales.

The sale or issuance of a substantial number of shares may adversely affect the market price for our common stock.

The future sale of a substantial number of shares of our common stock in the public market, or the perception that such sales could occur, could significantly and negatively affect the market price for our common stock. We expect that we will likely issue a substantial number of shares of our capital stock in financing transactions in order to fund our operations and the growth of our business. Under these arrangements, we may agree to register the shares for resale soon after their issuance. We may also continue to pay for certain goods and services with equity, which would dilute our current stockholders. Also, sales of the shares issued in this manner could negatively affect the market price of our stock.

Our ability to utilize our net operating loss carryforwards and certain other tax attributes may be limited.

We have incurred substantial tax losses during our history. Subject to various limitations, we may carryforward unused taxable losses, including those generated in the future, and other available credits to offset any future taxable income until the unused losses or credits expire. Federal and state tax laws impose restrictions on the utilization of net operating loss (“NOL”) and tax credit carryforwards in the event of an “ownership change” as defined by Section 382 of the Internal Revenue Code of 1986, as amended (“Section 382”). Generally, an ownership change occurs if the percentage of the value of the stock that is owned by one or more direct or indirect “five percent shareholders” increases by more than 50 percentage points over their lowest ownership percentage at any time during the applicable testing period (typically, three years). Under Section 382 and Section 383, if a corporation undergoes an “ownership change,” the corporation’s ability to use itspre-change NOL carryforwards and otherpre-change tax attributes to offset its post change income may be limited. Because of the cost and complexity involved in the analysis of a Section 382 ownership change and the fact that we do not have any taxable income to offset, we have not undertaken a study to assess whether an “ownership change” has

occurred or whether there have been multiple ownership changes since we became a “loss corporation” as defined in Section 382. Future changes in our stock ownership, which may be outside of our control, may trigger an “ownership change.” In addition, future equity offerings or acquisitions that have equity as a component of the purchase price could result in an “ownership change.” If an “ownership change” has occurred or does occur in the future, our ability to utilize our NOL carryforwards or other tax attributes may be limited, which could result in an increased future tax liability to us.

The exercise of outstanding options and warrants to acquire shares of our common stock would cause additional dilution which could cause the price of our common stock to decline.

In the past, we have issued options and warrants to acquire shares of our common stock. At DecemberMay 31, 2014,2015, there were 127,508,118,117,891,242, warrants, for which we have reserved 127,508,118117,891,242 shares of common stock, and 23,388,82322,695,801 vested and 7,994,825 7,730,952non-vested stock options outstanding, and we may issue additional options, warrants and other types of equity in the future as part ofstock-based compensation, capital raising transactions,

technology licenses, financings, strategic licenses or other strategic transactions. To the extent these options and warrants are ultimately exercised, existing common stockholders would experience additional dilution which may cause the price of our common stock to decline.

Limitations on director and officer liability and indemnification of our officers and directors by us may discourage stockholders from bringing suit against a director.

Our certificate of incorporation and bylaws provide, with certain exceptions as permitted by governing state law, that a director or officer shall not be personally liable to us or our stockholders for breach of fiduciary duty as a director, except for acts or omissions which involve intentional misconduct, fraud or knowing violation of law, or unlawful payments of dividends. These provisions may discourage stockholders from bringing suit against a director for breach of fiduciary duty and may reduce the likelihood of derivative litigation brought by stockholders on our behalf against a director. In addition, our certificate of incorporation and bylaws may provide for mandatory indemnification of directors and officers to the fullest extent permitted by governing state law.

Compliance with the rules established by the SEC pursuant to Section 404 of theSarbanes-Oxley Act of 2002 is complex. Failure to comply in a timely manner could adversely affect investor confidence and our stock price.

Rules adopted by the SEC pursuant to Section 404 of theSarbanes-Oxley Act of 2002 require us to perform an annual assessment of our internal controls over financial reporting and certify the effectiveness of those controls. The standards that must be met for management to assess the internal controls over financial reporting now in effect are complex, costly and require significant documentation, testing and possible remediation to meet the detailed standards. We may encounter problems or delays in completing activities necessary to make an assessment of our internal controls over financial reporting. If we cannot perform the assessment or certify that our internal controls over financial reporting are effective investor confidence and share value may be negatively impacted.

We do not expect to pay cash dividends in the foreseeable future on our common stock.

We have not historically paid cash dividends on our common stock, and we do not plan to pay cash dividends on our common stock in the foreseeable future.

Risks Related to this Offering

Our management team will have immediate and broad discretion over the use of the net proceeds from this offering.

There is no minimum offering amount required as a condition to closing this offering and therefore net proceeds from this offering will be immediately available to our management to use at their discretion. The decisions made by our management may not result in positive returns on your investment and you will not have an opportunity to evaluate the economic, financial or other information upon which our management bases its decisions.

You will experience immediate and substantial dilution as a result of this offering and may experience additional dilution in the future.

You will incur immediate and substantial dilution as a result of this offering. After giving effect to assumed sale of $[            ] of shares in this offering and after deducting estimated placement agent commissions and estimated offering expenses payable by us, if you purchase shares in this offering, you will suffer immediate and substantial dilution of approximately $[            ] per share in the net tangible book value of the common stock you acquire. See “Dilution” below for a more detailed discussion of the dilution you will incur if you purchase shares in this offering.

The offering may not be fully subscribed, and, even if the offering is fully subscribed, we will need additional capital in the future. If additional capital is not available, we may not be able to continue to operate our business pursuant to our business plan or we may have to discontinue our operations entirely.

The placement agent in this offering will offer the securities on a “best-efforts” basis, meaning that we may raise substantially less than the total maximum offering amounts. We will not provide any refund to investors if less than all of the securities are sold. Further, during 2013, 2014 and 2015, we have used a significant amount of cash to finance the continued development and testing of our product candidates. If we continue to use cash at this rate we will need significant additional financing, which we may seek to raise through, among other things, public and private equity offerings and debt financing. Any equity financings will likely be dilutive to existing stockholders, and any debt financings will likely involve covenants restricting our business activities. Additional financing may not be available on acceptable terms, or at all.

A large number of shares issued in this offering may be sold in the market following this offering, which may depress the market price of our common stock.

A large number of shares issued in this offering may be sold in the market following this offering, which may depress the market price of our common stock. Sales of a substantial number of shares of our common stock in the public market following this offering could cause the market price of our common stock to decline. If there are more shares of common stock offered for sale than buyers are willing to purchase, then the market price of our common stock may decline to a market price at which buyers are willing to purchase the offered shares of common stock and sellers remain willing to sell the shares. All of the securities issued in the offering will be freely tradable without restriction or further registration under the Securities Act.

Holders of our warrants will have no rights as common stockholders until they acquire our common stock.

Until warrant holders acquire shares of our common stock upon exercise of the warrants, the warrant holders will have no rights with respect to our common stock. Upon exercise of your warrants, you will be entitled to exercise the rights of a common stockholder only as to matters for which the record date occurs after the exercise date.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Information in this prospectus contains forward-looking statements. These forward-looking statements can be identified by the use of words such as “believes,” “estimates,” “could,” “possibly,” “probably,” “anticipates,” “projects,” “expects,” “may,” or “should” or other variations or similar words. No assurances can be given that the future results anticipated by the forward-looking statements will be achieved. The following matters constitute cautionary statements identifying important factors with respect to those forward-looking statements, including certain risks and uncertainties that could cause actual results to vary materially from the future results anticipated by those forward-looking statements. A description of key factors that have a direct bearing on our results of operations is provided above under “Risk Factors” beginning on page 65 of this prospectus.

Additional information on factors that may affect our business and financial results can be found in our filings with the SEC. All forward-looking statements should be considered in light of these risks and uncertainties. We assume no responsibility to update forward-looking statements made in this prospectus.

USE OF PROCEEDS

We will not receive any ofestimate that the net cash proceeds to us from the sale of the shares of common stock offered by this prospectus will be approximately $             assuming the sale of                  shares at an assumed public offering price of $             per share after deducting estimated placement agent fees and estimated offering expenses payable by us. However, we may not be successful in selling any or all of the securities offered hereby; as a result, we may receive significantly less in net proceeds, and the net proceeds received may not be sufficient to continue to operate our business.

An $             increase (decrease) in the assumed public offering price of $             per share would increase (decrease) the expected net cash proceeds of the offering to us by approximately $            . An increase (decrease) of              in the selling stockholders. Toassumed number of shares sold in this offering would increase (decrease) the extentexpected net cash proceeds areof the offering to us by approximately $            .

We currently expect to use the net proceeds from this offering to fund our research and development activities, including clinical and pre-clinical studies for the Parkinson’s disease and endoderm programs, as well as for general working capital needs.

Even if we sell all of the shares offered hereby, we will still need to obtain additional financing in the future in order to fully fund these research and development activities, as well as any resulting product candidates through the regulatory approval process. We may seek such additional financing through public or private equity or debt offerings or other sources, including collaborative or other arrangements with corporate partners, and through government grants and contracts.

We anticipate that the net proceeds obtained from this offering will be used to fund the following initiatives in order of priority (in thousands):

As of the date of this prospectus, we cannot specify with certainty all of the particular uses for the net proceeds to be received upon exercisethe completion of this offering. Accordingly, we will have broad discretion in the application of the Warrants,net proceeds, and investors will be relying on our judgment regarding the application of the proceeds of this offering.

Pending our use of the net proceeds from this offering, we intend to use any suchinvest the net proceeds for general corporatein a variety of capital preservation investments, including short-term, investment-grade, interest-bearing instruments and working capital purposes.U.S. government securities.

DIVIDEND POLICY

Our Board of Directors determines any payment of dividends. We have never declared or paid cash dividends on our common stock. We do not expect to authorize the payment of cash dividends on our shares of common stock in the foreseeable future. Any future decision with respect to dividends will depend on our future earnings, operations, capital requirements and availability, restrictions in future financing agreements and other business and financial considerations.

MARKET PRICE OF AND DIVIDENDS ON COMMON STOCK AND RELATED MATTERS

Market Information

Our common stock is approved for quotation on the OTC QB under the trading symbol “ISCO”. The OTC QB is a regulated quotation service that displays real-time quotes, last-sale prices and volume information in over-the-counter equity securities. The OTC QB securities are traded by a community of market makers that enter quotes and trade reports. This market is limited in comparison to an exchange and any prices quoted may not be a reliable indication of the value of our common stock.

As of DecemberMay 31, 2014,2015, we had 239,429,161272,769,607 shares of common stock outstanding, and approximately 639635 holders of record of our common stock, and we had 5,302,0255,300,960 shares of preferred stock outstanding, and eight holders of record of our preferred stock, with 5,302,0255,300,960 shares of preferred stock being convertible into 141,046,707148,417,318 shares of common stock.

The quotations reflect inter-dealer prices, without retail mark-up, mark-down or commission and may not reflect actual transactions. The high and low sales prices per share of our common stock, as reported by OTC QB for each quarter during fiscal years 2015, 2014 2013, and 2012,2013, are reported below:

SELLING STOCKHOLDERSDILUTION

On October 14, 2014, Sabby Volatility Warrant Master Fund Ltd. and Sabby Healthcare Volatility Master Fund, Ltd. and Andrey and Ruslan Semechkin, the Company’s Chief Executive Officer and Co-Chairman and Chief Scientific Officer and Director, respectively, collectively referred toOur net tangible book value as the selling stockholders, acquired an aggregate of                     2,500 shares, 2015 was approximately $[            ] million, or $[            ] per share of newly created Series H-1 and Series H-2 Preferred Stock and Warrants for an aggregate purchase price of $2,500,000.

The Series H-1 Preferred Stock and the Warrants issued to Sabby Volatility Warrant Master Fund Ltd. and Sabby Healthcare Volatility Master Fund, Ltd. contain exercise and conversion limitations providing that a holder thereof may not convert or exercise (as the case may be)common stock. If you invest in our common stock in this offering, your ownership interest will be diluted to the extent that, if after giving effect to such conversion or exercise (as the case may be), the holder or any of its affiliates would beneficially own in excess of 4.99% of the outstanding shares of common stock immediatelydifference between the public offering price per share and our pro forma net tangible book value per share after giving effect to such conversion or exercise (as the case may be). However, the 4.99% limitation would not prevent a selling stockholder from acquiring and selling in excess of 4.99% ofthis offering. We calculate net tangible book value per share by dividing our common stock through a series of acquisitions and sales while never beneficially owning more than 9.99% in aggregate.

This prospectus relates to the resalenet tangible book value, which is tangible assets less total liabilities, by the selling stockholders from time to time of up to an aggregate of 116,333,178 shares that are issuable or have been issued to the selling stockholders. Pursuant to a Registration Rights Agreement between us and the selling stockholders, this prospectus covers the resale of all shares of Common Stock issuable or that have been issued upon exercise of the Warrants.

The table below, which was prepared based on information supplied to us by the selling stockholders, sets forth information regarding the beneficial ownershipnumber of outstanding shares of our common stock owned bystock.

After giving effect to the selling stockholders and the shares that they may sell or otherwise disposeassumed sale of from time to time under this prospectus. Each of the selling stockholders, or their respective affiliates, transferees, donees or their successors, may resell, from time to time, all, some or none of the                  shares of our common stock coveredat an assumed offering price of $             per share and after deducting the commissions and estimated offering expenses payable by this prospectus,us, our as providedadjusted net tangible book value as of                     , 2015 would have been approximately $             million, or $             per share. This represents an immediate increase in net tangible book value of $             per share to existing stockholders and immediate dilution in net tangible book value of $             per share to new investors participating in this prospectus underoffering at the section entitled “Plan of Distribution” and in any applicable prospectus supplement. However, we do not know when, in what amount, or at what specific prices the selling stockholders may offer their shares for sale under this prospectus, if any. Each selling stockholder’s percentage of ownership in theassumed offering price. The following table is based upon 239,429,161 shares of our common stock outstanding as of December 31, 2014.

Information concerning any of the selling stockholders may change from time to time, and any changed information will be presented inillustrates this dilution on a prospectus supplement as necessary. Please carefully read the footnotes located below the table in conjunction with the information presented in the table.per share basis:

(1)	Includes all shares beneficially owned by the selling stockholders
Assumed public offering price per share						$
Net tangible book value per share as                     , 2015		$	[	]
Increase per share attributable to investors purchasing our common stock in this offering		$
As adjusted net tangible book value per share as of                     December 31, 2014.

(2)	The Series H-1 Preferred Stock and the Warrants contain exercise and conversion limitations providing that a holder thereof may not convert or exercise (as the case may be) to the extent that, if, 2015, after giving effect to such conversion or exercise (as the case may be), the holder or any of its affiliates would beneficially ownthis offering						$
Dilution in excess of 4.99% of the outstanding shares ofnet tangible book value per share to investors purchasing our common stock immediately after giving effect to such conversion or exercise (as the case may be). Accordingly, the number of shares of common stock set forth in the table as being registered for a selling stockholder exceeds the number of shares of common stock that the selling stockholder could own beneficially at any given time through its ownership of the Series H-1 Preferred Stock and the Warrants. Sabby Management, LLC serves as the investment manager of this stockholder and shares voting and investment power with respect to these shares on behalf of this stockholder. As manager of Sabby Management, LLC, Hal Mintz also shares voting and investment power on behalf of this stockholder. Each of Sabby Management, LLC and Hal Mintz disclaim beneficial ownership over the securities covered by this prospectus except to the extent of their pecuniary interest therein.offering						$

(3)	Pursuant to the applicable SEC rules, each of Dr. Andrey Semechkin and Dr. Ruslan Semechkin are considered to be the beneficial owner of shares held by the other.

(4)

Includes 67,929,360 total number of common shares owned by Dr. Andrey Semechkin, Dr. Ruslan Semechkin, and X-Master, Inc. (an entity owned by Dr. Andrey Semechkin), as well as 137,968,516 shares issuable upon conversion of outstanding shares of preferred stock, warrants and options to purchase shares of common stock exercisable within 60 days of December 31, 2014.

(5)	Includes 46,533,271 shares of Common Stock issuable upon exercise of Warrants held by the holder.

(6)	Includes 46,533,271 shares of Common Stock issuable upon exercise of Warrants held by the holder.

(7)	Includes 11,788,428 shares of Common Stock issuable upon exercise of Warrants held by the holder.

(8)	Includes 5,583,992 shares of Common Stock issuable upon exercise of Warrants held by the holder.

(9)	Assumes the sale of all shares of common stock registered pursuant to this prospectus, although the selling stockholders are under no obligation known to us to sell any shares of common stock at this time.

The dilution table above is based on [                ] shares of common stock outstanding and excludes, as of May 31, 2015, any impact of the following:

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

The following discussion of our financial condition and results of operations should be read in conjunction with our consolidated financial statements and related notes and other financial information included elsewhere in this prospectus. The discussion contains forward-looking statements based upon current expectations that involve risks and uncertainties, such as our plans, expectations and intentions. Our actual results may differ significantly from management’s expectations. This discussion should not be construed to imply that the results discussed herein will necessarily continue into the future, or that any conclusion reached herein will necessarily be indicative of actual operating results in the future. Such discussion represents only the best present assessment by our management.

Results of Operations

Three and nine months ended September 30, 2014March 31, 2015 compared with the three and nine months ended September 30, 2013March 31, 2014

Revenues

Revenue for the three months ended September 30, 2014,March 31, 2015, totaled $1.96$1.62 million, compared to $1.67$1.65 million for the three months ended September 30, 2013.March 31, 2014. LCT contributed $993,000$781,000 or 51%48% of total revenue for the three months ended September 30, 2014,March 31, 2015, compared to $860,000$846,000 or 51% for the three months ended September 30, 2013.March 31, 2014. The increasedecrease of $133,000$65,000 or 16%8% in LCT’s revenue for 2014 was driven primarily by higherlower sales to OEM customers and international distributors. LSC’s revenue of $970,000$841,000 for the three months ended September 30, 2014March 31, 2015 accounted for 49%52% of total revenue, compared to $810,000$803,000 or 49% of total revenue for the three months ended September 30, 2013.March 31, 2014. The increase of $160,000$38,000 or 20%5% in LSC’s revenue is due to our strategic efforts to expand and diversify sources of revenue across all sales/distribution channels. We saw the greatest sales growth in website sales and professional accounts.

For the nine months ended September 30, 2014 and 2013, revenue was $5.20 million and $4.41 million, respectively. LCT contributed $2.68 million or 52% of total revenue in the nine months ended September 30, 2014, compared to $2.24 million or 51% of total revenue for the nine months ended September 30, 2013. LCT’s revenue increased by $438,000 or 20%, primarily due to higher sales to OEM customers and international distributors. LSC’s revenue of $2.50 million or 48% of total revenue in the nine months ended September 30, 2014, compared to $2.17 million or 49% of total revenue in the nine months ended September 30, 2013. The increase of $350,000 or 16% in LSC’s revenue was a result of our strategic efforts to expand and diversify our sources of revenue, as well as robust growth in our professional channel sales.

Cost of sales

Cost of sales for the three months ended September 30, 2014March 31, 2015 was $518,000$418,000 or 26% of revenue, compared to $447,000$439,000 or 27% of revenue for the three months ended September 30, 2013.March 31, 2014. While our overall cost of sales as a percentage of revenue stayed relatively stable, LCT’s cost of sales decreased approximately 5%4% and LSC’s cost of sales increased approximately 5% as a percentage of sales. LCT’s cost of sales for the three months ended September 30, 2014March 31, 2015 was $357,000$295,000 or 36%38% of sales, compared to $353,000$358,000 or 41%42% of sales for the three months ended September 30, 2013.March 31, 2014. The decrease in cost of sales percentage for LCT is primarily due to a more favorable sales mix as well as efficiency gains in our operations for the three months ended September 30, 2014,March 31, 2015, compared to the corresponding period in 2013.2014. LSC’s cost of sales was $161,000$123,000 or 16%15% of sales for the three months ended September 30, 2014,March 31, 2015, compared to $93,000$81,000 or 11%10% of sales for the three months ended September 30, 2013.March 31, 2014. The increase in cost of sales for LSC is primarily attributable to a shift in our sales channel mix to a lower portion of our sales recorded from ecommerce, compared to other sales channels.

Cost of sales for the nine months ended September 30, 2014 was $1.37 million or 26% of revenue, compared to $1,110,000 or 25% of revenue for the same period in 2013. The slight increase inwhich has a low cost of sales as a percentage of revenue is partially attributable to a 1% decrease in costs for LCT and a 2% increase in costs for LSC. LCT’s cost of sales for the nine months ended September 30, 2014 was $1.03 million or 38% of sales compared to $877,000 or 39% of sales for the nine months ended September 30, 2013. The decrease inother high cost of sales for LCT is primarily due to a more favorable sales mix as well as efficiency gains in our operations for the nine months ended September 30, 2014, compared to the corresponding period in 2013. LSC’s cost of sales was $334,000 or 13% of sales for the nine months ended September 30, 2014, compared to $233,000 or 11% of sales for the nine months ended September 30, 2013. The increase in the cost of sales for LSC is primarily due to a shift in our sales mix to a lower portion of our sales recorded from ecommerce compared to other sales channels.

Cost of sales reflects direct costs including salaries and benefits related to manufacturing, third party manufacturing costs, materials, general laboratory supplies and an allocation of overhead. We aim to continue refining our manufacturing processes and supply chain management to improve the cost of sales as a percentage of revenue for both LCT and LSC.

Research and Development (“R&D”)

Research and development expenses were $1.39$1.12 million for the three months ended September 30, 2014,March 31, 2015, compared to $932,000$958,000 for the same period in 2013.2014. The increase of $460,000$160,000 or 49%17% is primarily due to increased stem cell line research and preclinical testing expenses of $625,000,$265,000, partially offset by lowera reduction in employee-related spending of $29,000, consulting$54,000, and material and supply costs of $63,000, tissue donation costs$58,000.

Our R&D efforts are primarily focused on the development of $67,000treatments for Parkinson’s disease (PD), stroke, metabolic liver diseases, osteoarthritis and stock-based compensation expensethe creation of $16,000.new cGMP grade human parthenogenetic stem cell lines. These projects are long-term investments that involve developing both new stem cell lines and new differentiation techniques that can provide higher purity populations of functional cells. We do not expect these projects to provide near-term revenue, although we have published milestones including the release of preclinical rodent and non-human primate PD study data in the first quarter of 2015. We anticipate decreased R&D expenditures in H2 2015 as a result of the completion of pre-clinical studies.

Research and development expenses are expensed as they are incurred, and are accounted for on a project by project basis. However much of our research has potential applicability to each of our projects.

Selling and Marketing Expense

Selling and marketing expenses for the ninethree months ended September 30, 2014March 31, 2015 were $3.76 million,$654,000, compared to $2.63$669,000 in the three months ended March 31, 2014. The decrease of $15,000 or 2% was primarily due to lower marketing materials, samples and printing costs of $31,000, website support costs of $21,000, commission and endorsement costs of $25,000, partially offset by higher employee-related spending of $39,000, and advertising expenses of $27,000.

We continued to intensify our marketing efforts by refining our sales and marketing strategies, expanding our sales channels and strengthening our operations to achieve target sales goals.

General and Administrative Expenses

General and administrative expenses for the three months ended March 31, 2015 were $1.40 million, reflecting a decrease of $250,000 or 15%, compared to $1.65 million for the same period in 2014. The decrease is primarily attributable to decreases in investor relations related costs of $135,000, temporary service fees of $93,000, stock based compensation costs of $77,000, and employee related costs of $39,000. The decreases were partially offset by increases in audit and accounting fees of $67,000, consulting expense of $21,000, and patent impairment expense of $16,000.

Other Income/Expense

Other income was $679,000 for the three months ended March 31, 2015 due to recognizing a reduction in the fair value of warrants from the October 2014 financing transaction. In the first quarter of 2014, total other income was $630,000, of which $623,000 related to the change in fair value of the warrant liability from our registered stock and warrant offering completed in July 2013, due to the subsequent revaluation of the warrant liability at each balance sheet date.

Year Ended December 31, 2014 Compared to Year Ended December 31, 2013

Revenues

Revenue for the year ended December 31, 2014, totaled $7.02 million, compared to $6.15 million in 2013. LCT contributed $3.51 million or 50% of total revenue in 2014, compared to $2.94 million or 48% of total revenue in 2013. The increase of $1.13$567,000 or 19% in LCT’s revenue for 2014 was driven primarily by higher sales to OEM customers and international distributors. LSC’s revenue of $3.51 million in 2014 accounted for 50% of total revenue, compared to $3.21 million or 43%52% of total revenue in 2013. In 2014, LSC’s revenue increased by $303,000 or 9% due to our strategic efforts to expand and diversify sources of revenue across all channels. We saw the greatest sales growth in professional and international accounts.

Cost of Sales

Cost of sales for the year ended December 31, 2014 was $1.92 million or 27% of revenue, compared to $1.64 million or 27% of revenue in 2013. While our overall cost of sales as a percentage of revenue stayed stable, LCT’s cost of sales decreased approximately 1% as a percentage of sales and LSC’s cost of sales increased approximately 4% as a percentage of sales. LCT’s cost of sales for the year ended December 31, 2014 was $1.38 million or 20% of sales, compared to $1.29 million or 21% of sales for the same period in the prior year. The decrease in cost of sales for LCT is primarily due to a more favorable sales mix as well as efficiency gains in our operations for the year ended December 31, 2014 compared to 2013. LSC’s cost of sales was $540,000 or 15% of revenues during 2014, compared to $355,000 or 11% of revenues in the prior year. The increase in cost of sales for LSC is primarily due to a shift in our sales mix, with a lower portion of our sales recorded from ecommerce compared to other sales channels, which have higher sales costs.

Cost of sales reflects direct costs including salaries and benefits related to manufacturing, third party manufacturing costs, materials, general laboratory supplies and an allocation of overhead. We aim to continue refining our manufacturing processes and supply chain management to further improve the cost of sales as a percentage of revenue for both LCT and LSC.

Research and Development (“R&D”)

Research and development expenses were $5.39 million for the year ended December 31, 2014, compared to $3.56 million in 2013. R&D expense increased approximately $1.83 million or 51% primarily due to higher stem cell line research and preclinical testing expenses of $1.44$2.24 million, partially offset by lower employee-relatedemployee related spending of $80,000,$109,000, lower consulting costs of $102,000,$126,000, lower tissue donation costs of $91,000,$98,000, lower lab supplies and materials of $95,000 and lower stock-based compensation expense of $50,000.$58,000.

Our R&D isefforts are primarily focused on the development of treatments for Parkinson’s disease (PD), metabolic liver diseases (such as Crigler-Najjar syndrome, (CNS) and Alpha 1-antitrypsin deficiency (A1AD)), diseases of the eye and the creation of new cGMP grade human parthenogenetic stem cell lines. These projects are long-term investments that involve developing both new stem cell lines and new differentiation techniques that can provide higher purity populations of functional cells. We do not expect these projects to provide near-term revenue, although we have published milestones including the release of preclinical rodent and non-human primate (NHP) PD study data in the first quarter of 2013. Building on the NHP PD pilot study, in May 2013 we initiated a large-scale pharmacology/toxicology primate study, which is intended to form a critical component of our regulatory submission that we anticipate filing in late 2014 or early 2015. We anticipate increaseddecreased R&D expenditures in 2014 and 2015 as a result of this large-scale primatethe pre-clinical study and the added costs associated with the preparation of the regulatory submission.

Research and development expenses are expensed as they are incurred, and are accounted for on a project by project basis. However much of our research has potential applicability to each of our projects.

Selling and Marketing Expense

Selling and marketing expenses for the three months ended September 30, 2014 were $745,000, compared to $632,000 in the three months ended September 30, 2013. The increase of $113,000 or 18% was primarily due to higher employee-related spending of $50,000, consulting and creative expenses of $59,000, logistics expense of $8,000, and website support of $19,000. Commission expense increased $62,000 as a result of higher sales. The increase was partially offset by a reduction of $78,000 in advertising expense and $29,000 is industry public relations expense.

Selling and marketing expenses for the nine months ended September 30, 2014 were $2.09 million, compared to $1.82 million in the nine months ended September 30, 2013. The increase of $269,000 or 15% was primarily due to higher employee-related spending of $117,000, consulting and creative expenses of $142,000, stock-based compensation for services provided of $11,000, expenses for marketing materials, samples and printing of $106,000, logistics costs of $13,000, and trade show costs of $17,000. Commission expense increased $105,000 as a result of higher sales. The increase was partially offset by a reduction of $220,000 in advertising expense, investor relations of $51,000, and website support of $24,000.

We continued to intensify our marketing efforts by refining our sales and marketing strategies, expanding our sales channels and strengthening our operations to achieve target sales goals.

General and Administrative Expenses

General and administrative expenses for the three months ended September 30, 2014 were $1.34 million, reflecting a decrease of $20,000 or 1%, compared to $1.36 million for the same period in 2013. The decrease is primarily attributable to decreases in investor relations related costs of $54,000, consulting expense of $23,000, temporary service fees of $36,000, patent impairment expense of $11,000, and licenses and permits expense of $11,000. The decreases were partially offset by increases in stock-based compensation expense of $47,000, employee related spending of $26,000, filing fees of $6,000, computer service and supplies expenses of $6,000, insurance related costs of $7,000, rent and building maintenance expenses of $8,000, and legal fees of $16,000.

General and administrative expenses for the nine months ended September 30, 2014 were $4.32 million, reflecting a decrease of $138,000 or 3%, compared to $4.46 million for the same period in 2013. The decrease is primarily attributable to decreases in employee-related spending of $126,000, stock-based compensation expense of $79,000, temporary service costs of $55,000, stock-based compensation for services provided by consultants of $52,000, consulting fees of $31,000, board of director fees of $24,000, filing fees of $18,000, and uncollectible write offs of $22,000. The decreases were partially offset by increases in audit and accounting related fees of $44,000, annual meeting related costs of $26,000, computer service and supplies expenses of $16,000, insurance related costs of $14,000, rent and building maintenance expenses of $19,000, and investor relations related costs of $167,000.

Other Income/Expense

Other expense was $0 for the three months ended September 30, 2014 due to recognizing a loss of $8,000 on a fixed asset disposal, offset by $8,000 of sublease income. In 2013, we recorded other expense of $2.1 million during the corresponding period primarily due to recognizing the fair value of $1.39 million for the warrant liability in excess of the investment proceeds received from our stock offering completed in July 2013, plus the associated financing costs of $738,000.

Other expense for the nine months ended September 30, 2014 was $1.54 million, due to recognizing loss of $3.45 million for the warrant exchange inducement expense offset by the income of $1.89 million for the change in fair value of the warrant liability from our registered stock and warrant offering completed in July 2013, due to the subsequent revaluation of the warrant liability at each balance sheet date and the final revaluation prior to the completion of the exchange of the warrants for our common stock. We recorded other expense of $2.1 million during the nine months ended September 30, 2013 primarily due to recognizing the fair value of $1.39 million for the warrant liability in excess of the investment proceeds received from our stock offering completed in July 2013, plus the associated financing costs of $738,000.

Year Ended December 31, 2013 Compared to Year Ended December 31, 2012

Revenues

Revenue for the year ended December 31, 2013, totaled $6.15 million, compared to $4.57 million in 2012. LCT contributed $2.94 million or 48% of total revenue in 2013, compared to $2.38 million or 52% of total revenue in 2012. The increase of $560,000 or 24% in LCT’s revenue for 2013 was driven primarily by higher sales to OEM customers and international distributors. LSC’s revenue of $3.21 million in 2013 accounted for 52% of total revenue, compared to $2.19 million or 48% of total revenue in 2012. In 2013, LSC’s revenue increased by $1.02 million or 47% partially due to the one-time recognition of deferred revenue related to a change in estimate for our 30-day product return guarantee. We previously deferred all revenues from website sales until our 30-day product return guarantee had lapsed. In 2013, due to more reliable information available on actual historical returns for the two years ended December 31, 2013 and 2012, we were able to refine our estimated rate of return. As a result of the change in estimate, we recognized previously deferred revenue of $277,000 and recorded an allowance for sales returns of $10,000, which is approximately 3% of one month’s sales. The remainder of the revenue increase is due to our strategic efforts to expand and diversify sources of revenue across all channels. We saw the greatest sales growth in website sales and professional accounts.

Cost of Sales

Cost of sales for the year ended December 31, 2013 was $1.64 million or 27% of revenue, compared to $1.27 million or 28% of revenue in 2012. The favorable reduction in cost of sales as a percentage of revenue in 2013 is primarily attributable to improvements in the manufacturing and supply chain management for LSC’s products resulting in a 3% decrease in cost of sales partially offset by a 2% increase in cost of sales for LCT primarily due to an $82,000 increase in the reserve for inventory obsolescence and expiration.

Cost of sales reflects direct costs including salaries and benefits related to manufacturing, third party manufacturing costs, materials, general laboratory supplies and an allocation of overhead. We aim to continue refining our manufacturing processes and supply chain management to further improve the cost of sales as a percentage of revenue for both LCT and LSC.

Research and Development (“R&D”)

Research and development expenses were $3.56 million for the year ended December 31, 2013, compared to $3.60 million in 2012. R&D expense decreased approximately $39,000 or 1%. R&D is focused on the development of treatments for Parkinson’s disease (PD), metabolic liver diseases (such as Crigler-Najjar syndrome, (CNS) and Alpha 1-antitrypsin deficiency (A1AD)), diseases of the eye and the creation of new cGMP grade human parthenogenetic stem cell lines. These projects are long-term investments that involve developing both new stem cell lines and new differentiation techniques that can provide higher purity populations of functional cells. We do not expect these projects to provide near-term revenue, although we have published milestones including the release of preclinical rodent and non-human primate (NHP) PD study data in the first quarter of 2013. Building on the NHP PD pilot study, in May 2013 we initiated a large-scale pharmacology/toxicology primate study, which is intended to form a critical component of our Investigational New Drug (IND) application that we anticipate filing in late 2014 or early 2015. We anticipate increased R&D expenditures in 2014 and 2015 as a result of this large-scale primate study and the added costs associated with the filing of the IND application.completion.

Research and development expenses are expensed as they are incurred, and are accounted for on a project by project basis. However, much of our research has potential applicability to each of our projects.

Selling and Marketing Expense

Marketing expenses for the year ended December 31, 20132014 amounted to $2.46$2.79 million, reflecting an increase of approximately $392,000$328,000 or 20%13%, as compared to $2.07$2.46 million in 2012.2013. The increase in spending was primarily driven by enhanced efforts in e-commerce marketing support, promotion and advertising expense of approximately $247,000, increased employee-relateddue to higher employee related spending of $126,000$145,000, higher consulting and creative expenses of $205,000, higher website support costs of $27,000, higher marketing materials, samples and printing of $27,000, higher logistics costs of $17,000 and higher temporary service cost of $16,000. Commission expense increased $130,000 due to increased staff, increased website costs of $52,000, and incentive plan accrual of $81,000, logistics related costs of $86,000, increased trade show expenses of $49,000 with resulting higher travel and meals expense of $42,000, increased rent and utilities of $26,000, and higher commission expense of $17,000. The increase wassales. These increases were partially offset by a reduction in advertising expense of $246,000$253,000, and reduction in consulting expenses, $71,000 in stock-based compensation and stock issued for consulting costs, and $16,000 in product testing costs.

The increase in commission expense was due to increased sales during 2013 over 2012, but was partially offset by a savingsinvestor relations of $69,000 in 2013 from 2012 due to reductions in a marketing arrangement with a consultant who promotes, markets, and sells skin care products for LSC. Prior and up to June 30, 2012, we incurred a 20% marketing fee on net profits generated from the consultant’s proprietary mailings. Subsequently in July 2012, we renegotiated the commission structure to reflect slightly lower rates, 18% on net revenues derived from direct sales and 9% on net revenues derived from referral sales. For the month of December 2012, the commission rate was temporarily increased to 25% on net revenues derived from direct sales on qualifying volume of orders. For the years ended December 31, 2013 and 2012, we recorded $80,000 and $149,000, respectively, as commission expense related to this agreement.$34,000.

General and Administrative Expenses

General and administrative expenses for the year ended December 31, 20132014 were $6.03$5.6 million, reflecting a decrease of $1.41 million$428,000 or 19%7%, compared to $7.44$6.03 million in 2012.2013. The decrease is primarily attributable to a more streamlined operating cost structure including lower employee stock-based compensation of $684,000,$155,000, reduced employee-related spending of $664,000$113,000 resulting from lower headcount, lower legal feestemporary service costs of $257,000,

$119,000, lower investor relations costs of $91,000, lower common stock for services expense of $41,000, and lower consulting expense of $253,000, lower corporate support expenses of $184,000, lower professional accounting fees of $132,000, a decrease in impairment of intangible assets totaling $138,000, lower board of director fees of $116,000, and lower travel and meals expense of $72,000. The decrease was$32,000. These decreases were partially offset by an increase in consultingaudit and accounting fees for investor relations of $454,000, an incentive plan accrual of $230,000, an$55,000, increase in stock-based compensation for services provided by consultantspatent impairment costs of $216,000,$40,000, increase in annual meeting costs of $38,000, and higher temporary labor expenseincrease in building related costs of $164,000.$23,000.

Other Income/Expense

Other expense was $2.93$3.78 million for the year ended December 31, 2014, primarily due to recognizing a loss of $3.45 million for the warrant exchange inducement expense, loss of $1.78 million for the fair value of warrant liability in excess of the investment proceeds received from our stock offering completed in October 2014, and associated financing costs of $984,000, partially offset by the income of $2.41 million for the change in fair value of the warrant liability and subsequent revaluations from our registered stock and warrant offerings completed in July 2013 and October 2014. In 2013, we recorded other expense of $2.93 million primarily due to recognizing $1.39 million for the fair value of warrant liability in excess of the investment proceeds received from our stock offering completed in July 2013, plus the associated financing costs of $738,000, plus the net loss from the subsequent revaluations of the warrant liability of $754,000 at each balance sheet date and upon warrant exercises. In 2012, we recorded other expense of $20,000.$754,000.

Liquidity and Capital Resources

Three and nine months ended September 30, 2014 compared with the three and nine months ended September 30, 2013

As of September 30, 2014,March 31, 2015, our cash and cash equivalents totaled $471,000,$611,000, compared to $2.24$1.1 million as of December 31, 2013.2014. At September 30, 2014,March 31, 2015, we had a working capital balancedeficit of $607,000,$3.62 million, compared to a $2.40$3.24 million deficit as of December 31, 2013.2014. The positive change in our working capital from a deficit at December 31, 2013 is primarily due to removal of the fair value of the warrant liability of $3.36 million resulting from our balance sheet as of the end of the second quarter inOctober 2014 resulting from the exchange of warrants for common stock.Securities Purchase Agreement.

Operating Cash Flows

Net cash used in operating activities was $4.45 million$764,000 for the ninethree months ended September 30, 2014,March 31, 2015, compared to $4.23$2.03 million for the corresponding period in 2013. The2014. While the net loss after non-cash adjustments totaling $1.6 million in the three months ended March 31, 2015, compared to $1.5 million for the same period in 2014 stayed relatively stable, the primary factor contributing to the variability in the reported cash flow amounts relates to an increase in accounts payable of approximately $1.1 million during the net loss after non-cash adjustments totaling $4.55 million in the nine months ended September 30, 2014, compared to $3.68 million for the same period in 2013.first quarter of 2015.

Investing Cash Flows

Net cash used in investing activities was $746,000$167,000 for the ninethree months ended September 30, 2014,March 31, 2015, compared to $514,000$156,000 in the same period in 2013.2014. The slight increase was the result of higher payments for capital expenditure of $228,000, and higher patent licenses and trademarks spending of $5,000.$10,000.

Financing Cash Flows

Net cash provided by financing activities was $3.43 million$431,000 for the ninethree months ended September 30, 2014,March 31, 2015, compared to $5.89 million$935,000 in the same period in 2013.2014. Approximately $1.42 million$431,000 was received during the first quarter of 2015 from exercises of warrants from the October 2014 financing transaction. The net proceeds of $3.43 million$935,000 received in 2014 was attributable to the issuance of 8.25.2 million shares of common stock for approximately $1.1 million, net of stock issuance costs of $169,000 under the purchase agreement with Lincoln Park Capital, LLC (“Lincoln Park”), which we entered into in December 2013. In addition, we received net proceeds of $2.1 million from the sale of 19.3 million shares

Management continues to Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer and Dr. Ruslan Semechkin our Chief Scientific Officer and a director. The shares were offered and sold to the purchasers in private placement transactions.

During the nine months ended September 30, 2013, the Company issued an additional 16.3 million shares of common stock in transactions that were not registered under the Securities Act of 1933. The Company issued a total of 1.2 million shares of common stock on various dates from January 1, 2013 through March 15, 2013 raising $264,000 from stock purchases by Aspire Capital, issued a total of 10.1 million shares of common stock on January 22, 2013 raising $2,025,000 from Dr. Andrey Semechkin, the Company’s Co-Chairman and Chief Executive Officer and Dr. Simon Craw, Company’s Executive Vice President Business Development, and issued 5 million shares of common stock on March 12, 2013 raising $1,000,000 from a stock purchase by Dr. Andrey Semechkin, the Company’s Co-Chairman and Chief Executive Officer and by other investors with long-standing relationships with and who closely follow the Company. For further discussion of these transactions, see Note 6, Capital Stock,Common Stock Transactions to our condensed consolidated financial statements.

Year Ended December 31, 2013 Compared to Year Ended December 31, 2012

As of December 31, 2013 and 2012, our cash and cash equivalents totaled $2.24 million and $654,000, respectively. At December 31, 2013 we had a working capital deficit of $2.40 million compared to working capital of $395,000 at December 31, 2012. The working capital deficit is due to the fair value of warrant liability of $4.93 million resulting from our S-1 July Registered Offering completed in July 2013.

Operating Cash Flows

Net cash used in operating activities was $5.64 million for the year ended December 31, 2013, compared to $6.69 million in 2012. The primary factor contributing to the variability in the reported cash flow amounts relates to the lower net loss after non-cash adjustments totaling $4.96 million in 2013, compared to $6.70 million in 2012.

Investing Cash Flows

Net cash used in investing activities was $896,000 for the year ended December 31, 2013, compared to $786,000 in 2012. Patent related spending approximated $729,000 during 2013. In addition, purchases of property and equipment totaling approximately $167,000 in 2013 consisted primarily of laboratory equipment, software, leasehold improvements and computer equipment.

Net cash used in investing activities was $786,000 for the year ended December 31, 2012. Purchases of property and equipment of $197,000 in 2012 consisted primarily of laboratory equipment, furniture, computer equipment and leasehold improvements related to new corporate offices. In addition, we made payments for patent licenses of $596,000 during 2012.

Financing Cash Flows

Net cash provided by financing activities was $8.12 million for the year ended December 31, 2013, compared to $6.79 million in 2012.

During the year ended December 31, 2013, we issued an additional 16.3 million shares of common stock in transactions that were not registered under the Securities Act of 1933. We issued a total of 1.2 million shares of common stock on various dates from January 1, 2013 through March 15, 2013 raising $264,000 from stock purchases by Aspire Capital, issued a total of 10.1 million shares of common stock on January 22, 2013 raising $2,025,000 from Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer and Dr. Simon Craw, our Executive Vice President Business Development, and issued 5 million shares of common stock on March 12, 2013 raising $1,000,000 from a stock purchase by Dr. Andrey Semechkin and by other investors with long-standing relationships with and who closely follow the Company.

On July 24, 2013, we completed a financing transaction under a Form S-1 Registration Statement filed with the U.S. Securities and Exchange Commission raising approximately $2.4 million in net proceeds (the “S-1 July Registered Offering”). Also during the third and fourth quarters of 2013, we raised additional net proceeds of $2.4 million upon partial exercise of the Series A and B Warrants issued as part of the S-1 July Registered Offering.

In December 2013 we entered into a purchase agreement with Lincoln Park Capital Fund, LLC (“Lincoln Park”), pursuant to which Lincoln Park has agreed to purchase from us up to an aggregate of $10.25 million of our common stock (subject to certain limitations) from time to time through January 2017. Of the aggregate $10.25 million of our common stock that may be sold to Lincoln Park, on December 11, 2013, the trading day immediately preceding the date we first filed a registration statement for this transaction, we sold 1.67 million shares of our common stock to Lincoln Park for an aggregate purchase price of $250,000, which we refer to as the Initial Purchase. For further discussion of these transactions, see Note 6, Capital Stock,Common Stock transactions to our consolidated financial statements.

Net cash provided by financing activities was $6.79 million for the year ended December 31, 2012. We received approximately $4.94 million, net of stock issuance costs, from the issuance of five million shares of Series G Preferred Stock in 2012. For further discussion, see Note 6, Capital Stock,Series G Preferred Stock . In addition, we raised $2.09 million from the issuance of 5,000,000 shares of common stock to Aspire Capital Group and paid dividends of $237,000 to our preferred stockholders.

Management is currently evaluatingevaluate various financing sources and options to raise working capital to help fund our current research and development programs and operations. We will need to obtain significant additional capital from sources including exercise of outstanding warrants, equity and/or debt financings, license arrangements, grants and/or collaborative research arrangements to sustain our operations and develop products. Thereafter, we will need to raise additional working capital.

Unless we obtain additional financing, we do not have sufficient cash on hand to operate for 12 months from the condensed consolidated balance sheet date. The timing and degree of any future capital requirements will depend on many factors, including:

Additional financing through strategic collaborations, public or private equity financings or other financing sources may not be available on acceptable terms, or at all. Additional equity financing could result in significant dilution to our stockholders. Additional debt financing may be expensive and require us to pledge all or a substantial portion of our assets. Further, if additional funds are obtained through arrangements with collaborative partners, these arrangements may require us to relinquish rights to some of our technologies, product candidates or products that we would otherwise seek to develop and commercialize on our own. If sufficient capital is not available, we may be required to delay, reduce the scope of or eliminate one or more of our product initiatives.

During the quarter ended December 31, 2013, we exited the development stage based on a consistent, increasing revenue trend and more significant revenue totals generated from our two commercial businesses. We had been in the development stage from inception through the quarter ended September 30, 2013, and have accumulated losses from inception through the quarter ended September 30, 2014, and expect to incur additional losses in the near future. We currently have no revenue generated from our principal operations in therapeutic and clinical product development through research and development efforts. We need to raise additional working capital. The timing and degree of any future capital requirements will depend on many factors. For the quarter ended September 30, 2014,March 31, 2015, our average burn rate was approximately $495,000$255,000 per month, excluding capital expenditures and patent costs averaging $83,000$56,000 per month. There can be no assurance that we will be successful in maintaining our normal operating cash flow and that the timing of our capital expenditures will result in cash flow sufficient to sustain our operations through 2014. As part of the June 2014 warrant exchange transaction discussed above, we agreed that until September 14, 2014 we would not issue additional shares in capital raising transactions other than in private placements to our officers and directors.2015. Additionally, pursuant to the terms of the October 2014 Securities Purchase Agreement entered into in connection with the private placement discussed below, the Company may not sell shares to Lincoln Park under the Purchase Agreement with Lincoln Park, or otherwise enter into a variable rate transaction, until March 2016. Additionally, pursuant to the terms of the October 2014 Securities Purchase Agreement, the Company may notwas unable to issue any of its securities until theMay 7, 2015 (the 90th day following the effective date of the last registration statement on Form S-1 filed withregistering all Registrable Securities (as defined in the SEC on November 3, 2014registration rights agreement, as amended, entered into in connection with registering for resale certain shares of common stock underlying securities issued in the private placement.Securities Purchase Agreement)). However, the Company may still issue securities in certain circumstances, including issuing shares in private placements to its officers, directors and employees at market prices and issuing securities pursuant to the Company’s equity incentive plans.

Based on the factors above, there is substantial doubt about our ability to continue as a going concern. The condensed consolidated financial statements were prepared assuming that we will continue to operate as a going concern. The condensed consolidated financial statements do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the outcome of this uncertainty. Management’s plans in regard to these matters are focused on managing our cash flow, the proper timing of our capital expenditures, and raising additional capital or financing in the future.

We do not currently have any obligations for milestone payments under any of our licensed patents other than the minimum license fee of $75,000 annually, payable in two installments per year to Advanced Cell TechnologyOcata pursuant to the amended UMass IP license agreement. No licenses are terminable at will by the licensor. For further discussion of our patents, see Note 4 to our condensed consolidated financial statements.

On October 14, 2014, in a private placement,Management is currently evaluating various financing sources and options to raise working capital to help fund our current research and development programs and operations. We will need to obtain significant additional capital from sources including equity and/or debt financings, license arrangements, grants and/or collaborative research arrangements to sustain our operations and develop products. Thereafter, we sold a total of (i) 2,500 shares of Series H Convertible Preferred Stock convertible into 38,777,726 shares of common stock at an initial conversion price of $0.06447 (ii) Series A warrants (the “Series A Warrants”)will need to purchase upraise additional working capital. Unless we obtain additional financing, we do not have sufficient cash on hand to 38,777,726 shares of common stockoperate for an initial exercise price of $0.0921 per share exercisable immediately and which have a term of 5.5 years, (iii) Series B warrants (the “Series B Warrants”) to purchase up to 38,777,726 shares of common stock for an initial exercise price of $0.06447 per share exercisable immediately and which have a term of 6 months, (iv) Series C warrants (the “Series C Warrants”, together with the Series A Warrants, the Series B Warrants, collectively, the “Warrants”) to purchase up to 38,777,726 shares of common stock for an initial exercise price of $0.06447 per share exercisable immediately and which have a term of 12 months for an aggregate initial gross purchase price of $2.5 million, as discussed in Note 12, Subsequent Event, to ourfrom the condensed consolidated financial statements.balance sheet date. The timing and degree of any future capital requirements will depend on many factors, including:

During the quarter ended December 31, 2013, we exited the development stage based on a consistent, increasing revenue trend and more significant revenue totals generated from our two commercial businesses. We had been in the development stage from inception through the quarter ended September 30, 2013, and have accumulated losses from inception through the quarter ended March 31, 2015, and expect to incur additional losses in the near future.

Off-Balance Sheet Arrangements

As of September 30, 2014,March 31, 2015, we did not have any off-balance sheet arrangements.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures. On an on-going basis, we evaluate our estimates and assumptions, including those related to revenue recognition, allowances for accounts receivable, inventories, intangible assets, warrant liabilities, stock-based compensation and income taxes. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions and conditions.

We believe the following accounting policies to be critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Previously we were a Development Stage Company

During the quarter ended December 31, 2013, we exited the development stage based on a consistently, increasing revenue trend and more significant revenue totals generated from our two commercial businesses. We have been in the development stage from inception through to the quarter ended September 30, 2013, and have accumulated losses from inception through the year ended December 31, 2013, and expect to incur additional losses in the near future. We currently have no revenue generated from our principal operations in therapeutic preclinical and clinical product development through our research and development efforts.

Inventories

We account for inventory using the first-in, first-out (FIFO) method for our Lifeline Skin Care products, Lifeline Cell Technology cell culture media and reagents, average cost and specific identification methods for our Lifeline Skin Care products, and specific identification method for our Lifeline Cell Technology products. We state our inventory balances at the lower of cost or market. Lab supplies used in the research and development process are expensed as consumed. Inventory is reviewed periodically for product expiration and obsolescence and is adjusted accordingly.

Property and Equipment

We record property and equipment at cost. The provision for depreciation and amortization is computed using the straight-line method over the estimated useful lives of the assets, generally over five years. The costs of major remodeling and leasehold improvements are capitalized and depreciated over the shorter of the remaining term of the lease or the life of the asset.

Intangible Assets

Intangible assets consist of acquired research and development rights used in research and development, and capitalized legal fees related to the acquisition, filing, maintenance, and defense of patents. Patents and patent licenses are recorded at cost and are amortized on a straight-line basis over the shorter of the lives of the underlying patents or the useful life of the intangible asset, generally 15 years. Intangible asset amortization expenses are included in research and development expenses.

Long-Lived Asset Impairment

We review long-lived assets for impairment when events or changes in business conditions indicate that their carrying value may not be recovered, at least annually. We consider assets to be impaired and write them down to fair value if expected associated undiscounted cash flows are less than the carrying amounts. Fair value is the present value of the associated cash flows. Due to the numerous variables associated with our judgments and assumptions relating to the carrying value of our intangible assets and the effects of changes in circumstances affecting these valuations, both the precision and reliability of the resulting estimates are subject to uncertainty. As additional information becomes known, we may change our estimate, in which case the likelihood of a material change in our reported results would increase.

Revenue Recognition

We recognize revenue when all four of the following criteria are met: (i) persuasive evidence that an arrangement exists; (ii) delivery of the products and/or services has occurred; (iii) the selling price is fixed or determinable; and (iv) collectability is reasonably assured. Should changes in conditions cause management to determine these criteria are not met for certain future transactions, revenues recognized for any reporting period could be adversely impacted.

We recognize revenue from product sales at the time of shipment to the customer, provided no significant obligations remain and collection of the receivable is reasonably assured. If the customer has a right of return, we recognize product revenues upon shipment, provided that future returns can be reasonably estimated. In the case where returns cannot be reasonably estimated, revenue will be deferred until such estimates can be made or the right of return has expired.

Cost of Sales

Cost of sales consists primarily of salaries and benefits associated with employee efforts expended directly on the production of the Company’s products and include related direct materials, general laboratory supplies and allocation of overhead. Certain of the agreements under which we have licensed technology will require the payment of royalties based on the sale of its future products. Such royalties will be recorded as a component of cost of sales. Additionally, the amortization of license fees or milestone payments related to developed technologies used in our products will be classified as a component of cost of sales to the extent such payments become due in the future. Cost of sales included salaries and benefits related to manufacturing, third party manufacturing costs, raw materials, general laboratory supplies and an allocation of overhead.

Research and Development Costs

Research and development costs, which are expensed as incurred, are primarily comprised of salaries and benefits associated with research and development personnel, overhead and occupancy, contract services, and amortization of license costs for technology used in research and development with alternative future uses.

Registration Payment Arrangements

We are required to separately recognize and measure registration payment arrangements, whether issued as a separate agreement or included as a provision of a financial instrument or other agreement. Such payments include penalties for failure to effect a registration of securities.

Stock-Based Compensation

We are required to measure and recognize compensation expense for all stock-based payment awards made to employees and consultants based on estimated fair value. We estimate the fair value of stock options granted using the Black-Scholes option-pricing model.

The determination of fair value of stock-based awards using the Black-Scholes option-pricing model requires the use of certain estimates and highly judgmental assumptions that affect the amount of stock-based compensation expense recognized in our Consolidated Statements of Operations. These include estimates of the expected volatility of our stock price, expected option life, expected dividends and the risk-free interest rate. Estimated volatility is a measure of the amount by which our stock price is expected to fluctuate each year during the expected life of the award. The expected option life is calculated using the mid-point method as prescribed by accounting guidance for stock-based compensation. We determined expected dividend yield to be 0% given that we have never declared or paid any cash dividends on our common stock, and we currently do not anticipate paying such cash dividends. The risk-free interest rate is based upon U.S. Treasury securities with remaining terms similar to the expected term of the share-based awards. If any of the assumptions used in the Black-Scholes model change significantly, stock-based compensation expense may differ materially from what we have recorded in the current period.

Income Taxes

We account for income taxes in accordance with provisions which set forth an asset and liability approach that requires the recognition of deferred tax assets and deferred tax liabilities for the expected future tax

consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Valuation allowances are established when necessary to reduce deferred tax assets to the amount that is more likely than not expected to be realized. In making such a determination, a review of all available positive and negative evidence must be considered, including scheduled reversal of deferred tax liabilities, projected future taxable income, tax planning strategies, and recent financial performance.

Concentration of Credit Risk

We maintain our cash and cash equivalents in banks located primarily in the United States. Beginning December 31, 2010, through December 31, 2012, all noninterest-bearing transactionOur accounts were fully insuredare guaranteed by the Federal Deposit Insurance Corporation (“FDIC”), regardless of the balance of the account, at all FDIC-insured institutions, upon the implementation of section 343 of the Dodd-Frank Wall Street Reform and Consumer Protection Act that provided for unlimited insurance coverage of noninterest-bearing transaction accounts. After December 31, 2012, our accounts are guaranteed by the FDIC up to $250,000 per financial institution.

Income (Loss) Per Common Share

The computation of net loss per common share is based on the weighted average number of shares outstanding during each period. The computation of diluted earnings per common share is based on the weighted average number of shares outstanding during the period plus the common stock equivalents, which would arise from the exercise of stock options and warrants outstanding using the treasury stock method and the average market price per share during the period.

Recent Accounting Pronouncements

In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. The ASU provides guidance to an organization’s management, with principles and definitions that are intended to reduce diversity in the timing and content of disclosures that are commonly provided by organizations today in the financial statement footnotes. The amendments are effective for annual periods ending after December 15, 2016, and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. The Company does not intend to early adopt this standard. The adoption of this standard will not have an impact on the financial condition of the Company.

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued ASUAccounting Standard Update (“ASU”) No. 2014-09,Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard isIn 2015, FASB has tentatively deferred ASU No. 2014-09 for one year, and with that deferral, ASU No. 2014-09 will be effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, which for us on January 1, 2017. Early application is not permitted.will be our 2018 fiscal quarter. The standard permits the use of either the retrospective or cumulative effect transition method. We are currentlyThe Company is evaluating the effect that ASU 2014-09 will have on ourits consolidated financial statements and related disclosures. We haveThe Company has not yet selected a transition method nor have wehas it determined the effect of the standard on ourits ongoing financial reporting.

In July 2013, the FASB issued an accounting standards update that provides explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The guidance is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company has adopted this guidance at the beginning of the first quarter of fiscal year 2014. The adoption of this standard does not have a material impact on the Company’s financial position, results of operations or related financial statement disclosures.

BUSINESS

Business Overview

International Stem Cell Corporation (sometimes referred to herein as “ISCO”, the “Company”, “we”, “us”, or “our”) is a biotechnology company focused on the development of therapeutic and biomedical research products and two revenue-generating businesses offering potential for increased future revenue.

We were in the development stage from inception through the quarter ended September 30, 2013. We exited the development stage based on a consistent, increasing revenue trend and more significantcurrently have no revenue generated from our two commercial businesses.principal operations in therapeutic and clinical product development through research and development efforts. We have generated product revenuesrevenue from our two commercial businesses, cosmetic and research products, of $6.1a total of $7.0 million and $4.6$6.1 million for the years ended December 31, 2014 and 2013, and 2012, respectively. We currently have no revenues generated from our principal operations in therapeutic pre-clinical and clinical product development.

Our products are based on multi-decade experience with human cell culture and a proprietary type of pluripotent stem cells, “human parthenogenetic stem cells” (“hpSCs”). Our hpSCs are comparable to human embryonic stem cells (“hESCs”) in that they have the potential to differentiate into many types of more specialized human cells. However, the derivation of hpSCs does not require the use of fertilized eggs or the destruction of viable human embryos and also offers the potential for the creation of immune-matched cells and tissues that are less likely to be rejected following transplantation. ISCO scientists have created the first parthenogenetic, homozygous stem cell line that can be a source of therapeutic cells for hundreds of millions of individuals of differing genders, ages and racial background with minimal immune rejection after transplantation. We have facilities and manufacturing processes that we believe comply with the requirements of current Good Manufacturing Practice (GMP) standards as defined by the U.S. Code of Federal Regulations and promulgated by the U.S. Food and Drug Administration (“FDA”).

We are developing different human cell types from our stem cells that may result in therapeutic products. We focus on applications where cell and tissue therapy is already proven but where there is an insufficient supply of functional cells or tissue. We believe that the most promising potential clinical applications of our technology are:

We are currently completinghave completed our IND-enabling pre-clinicalpreclinical studies on our most advanced program, the development of neural stem cells for the treatment of Parkinson’s disease.

disease, and filed the regulatory submission to the Australian Therapeutics Goods Administration (“TGA”) to start a phase 1/2a clinical trial in Australia. Each of these product candidates will require extensive preclinical and clinical development and may require specific unforeseen licensing rights obtained at substantial cost before regulatory approval may be achieved and the products sold for therapeutic use.

Market Opportunity and Growth Strategy

Therapeutic Market – Clinical Applications of hpSCs for Disease Treatment

Parkinson’s disease (“PD”) is the second most common neurodegenerative disease and, according to the Parkinson Disease Foundation, there are more than one million sufferers in the United States and more than $2 billion is spent on medication. Currently there is no cure for PD and the improvements in symptoms provided by PD drugs often diminish with time. Using our proprietary technologies and know-how, we are creating neural stem cells from hpSCs as a potential treatment of PD and potentially other central nervous system disorders in order to address this significant market opportunity.

Liver disease affects one in ten persons according to the American Liver Foundation, and is one of the top ten leading causes of death in the United States. There are more than 100 individual diseases of the liver and, for people with liver failure; the only effective treatment is full or partial organ transplantation. However, the demand for liver organs far exceeds the number available. According to the American Liver Foundation, over 16,000 individuals in the United States are waiting for a transplant. Using our proprietary technologies and know-how, we are creating liver cells from hpSCs that may be used to treat a variety of hepatic and metabolic liver diseases to address this significant market opportunity. Importantly, liver cell transplantation has already been used in early stage clinical trials to treat patients with liver failure and has proven especially useful as a “bridge” to keep patients alive until they can receive a whole liver transplant.

Corneal blindness currently affects between seven and eight million people worldwide according to the World Health Organization. Using our proprietary technologies and know-how, we are creating cornea-like structures from hpSCs. These clear hollow spheres are composed of tissue with a three-dimensional layered structure similar to what is found in normal corneal tissue. Portions or all of these tissue layers may be suitable for corneal transplantation in humans. In addition, corneal cells can be used for coating contact lenses to accelerate corneal healing.

Diseases involving retinal degeneration include age-related macular degeneration (“AMD”) and retinitis pigmentosa (“RP”). These diseases are characterized by the death of critical photoreceptor cells called “rods” and “cones”. Photoreceptor death is due to an abnormality and/or to disruption or death of supportive cells called retinal pigment epithelial (“RPE”) cells. According to the Center for Disease Control and Prevention, approximately 1.8 million Americans aged 40 and over are affected by AMD.

CosmeceuticalCosmetic Market – Skin Care Products

Anti-aging representsProducts that provide anti-aging benefits represent a significant portion of the global facial skincare market and seems to be resilient to a recessionary economy.market. In key marketsregions, such as the U.S. and Asia, we believe thatthe growth of the facial skincare market is positioned for significant growth.

In order to make claims that products can actually diminish the signs of aging, marketers are constantly looking for new combinations of specialty ingredients. The categorydriven by increases in consumer disposable income and growing popularity of skincare products based on biotechnology, such as human stem cellscells. Currently this market segment is just beginning to be developed,in its early stages of development and therefore we believe that it has a significant growth potential. Our goal is to leverage our leadership in human stem cell technology to develop and commercialize advanced anti-aging skincare products for theour retail, professional, and professionalinternational channels.

Our wholly-owned subsidiary, Lifeline Skin Care, Inc. (“LSC”), develops, manufactures and markets cosmetic skin carea line of luxury skincare products to address this significant market opportunity. LSC has several products, which includewith anti-aging benefits that is based on our proprietary stem cell extract.

LSC’s products are sold nationallyin United States and internationally through a branded website;website, through professional channels (including dermatologists;dermatologists, plastic surgeons; medical, day and resort spas,) and distributors. Domestically, we plan to increase distributiona network of our products by increasing brand awareness and resonance through advertising, sales promotion and public relations. Internationally, we are increasing distribution and sales through agreements with specialty distributors in both Latin America and Asia.international distributors.

Biomedical Market – Primary Human Cell Research Products

The global market for human cell systems for use in basic research is extremely large, with continuing anticipated growth. We believe that the following are the main drivers in the research market:

Our wholly-owned subsidiary Lifeline Cell Technology, LLC (“LCT”) develops, manufactures and commercializes over 130 human cell culture products, including frozen human “primary” cells and the reagents (called “media”) needed to grow, maintain and differentiate the cells, in order to address this significant market opportunity. LCT’s scientists have used a technology called basal medium optimization to systematically produce optimized products designed to culture specific human cell types and to elicit specific cellular behaviors. These techniques also produce products that do not contain non-human animal proteins, a feature desirable to the research and therapeutic markets.

Each LCT cell product is quality tested for the expression of specific markers (to assure the cells are the correct type), proliferation rate, viability, morphology and absence of pathogens. Each cell system also contains associated donor information and all informed consent requirements are strictly followed. LCT’s research products are marketed and sold by its internal sales force, OEM partners and LCT brand distributors in Europe and Asia.

While we have continued to expand our sales and marketing efforts in order to increase revenue, to date we have generated limited and unpredictable revenues to support our core therapeutic research and development efforts. Underpinning our research into the therapeutic properties of hpSC, we plan to expand our collection of parthenogenetic stem cell lines by creating and banking new clinical-grade hpSC lines at our Oceanside, California facility. We intend to create these new lines according to good tissue practices (“GTP”) and current good manufacturing practices (“cGMP”) and use them as sources for our own internal development programs and to generate revenue through licensing opportunities. We are actively working with a number ofin vitro fertility (“IVF”) clinics in the southern California region enrolling individuals who are willing to donate oocytes for research purposes in order to create new hpSC lines.

History

ISCO was incorporated in Delaware on June 7, 2005 under the name BTHC III, Inc. to effect the reincorporation of BTHC III, LLC, a Texas limited liability company, mandated by a plan of reorganization. On December 28, 2006 pursuant to a Share Exchange Agreement, BTHC III, Inc. issued 33,156,502 shares of common stock, representing approximately 93.7% of the common stock outstanding immediately after the transaction, to the shareholders ofreorganization, through International Stem Cell Corporation, a California corporation (“ISC California”),. The reincorporation was effected in exchange for all outstanding stock of ISC California. As a result of this transaction,December 2006 and ISC California became wholly-owned by ISCO. This transaction was accounted for as a reverse merger for accounting purposes. On January 29, 2007, we changed our name to International Stem Cell Corporation.

ISC California was incorporated in California inIn June 2006, for the purpose of restructuring the business of Lifeline Cell Technology, LLC (“LCT”), which was organized in California in August 2001. As a result of the restructuring, LCT became wholly-owned by ISC California. Lifeline Skin Care, Inc. was formed in the State of California on June 5, 2009 and is a wholly-owned subsidiary of ISCO California.

Our principal executive offices are located at 5950 Priestly Drive, Carlsbad, CA 92008, and our telephone number is (760) 940-6383. Our corporate website address iswww.internationalstemcell.com, Lifeline Cell Technology’s website address iswww.lifelinecelltech.com, and Lifeline Skin Care’s website address iswww.lifelineskincare.com. Our common stock is quoted on the OTC QB and trades under the symbol “ISCO”.

Frequently Asked Questions

What are Stem Cells?

Cells are the basic living units that make up humans, animals, plants and other organisms. Stem cells have two important characteristics that distinguish them from other types of cells. First, they can renew themselves for long periods of time. Second, they are unspecialized and under certain conditions can be induced to become cells with special functions such as metabolically active cells of the liver or transparent and protective cells of the eye. Until recently, scientists have worked with two major kinds of stem cells,embryonic stem cells (hESCs) andadult stem cells that each has different properties and characteristics. ISCO has developed a third category of stemofstem cells namedparthenogenetic stem cells (the hpSCs mentioned above) that promise to have significant therapeutic advantages relative to these other types.

What are Pluripotent Stem Cells?

Pluripotent stem cells are able to be differentiated or developed into virtually any other cell made in an organism. Both embryonic and parthenogenetic stem cells are pluripotent. Some scientists are exploring manipulation of adult cells into a potentially pluripotent stage. This type of stem cells is calledinduced pluripotent stem cells.

What are Embryonic Stem Cells?

Embryonic stem cells are derived from embryos at an early stage of development, typically when they are in a structure of a small number of cells called theblastocyst.blastocyst. Embryonic stem cells are expanded in a laboratory cell culture process. Once cell lines are established, batches of them can be frozen and shipped to other laboratories for further culture and experimentation.

What are Adult Stem Cells?

An adult stem cell is an undifferentiated cell found among differentiated cells in a tissue or organ. An adult stem cell can renew itself (generally to a lesser degree than can embryonic or parthenogenetic stem cells) and differentiate to a limited number of specialized cell types. These cells can be isolated from different tissues such as the bone marrow, fat tissue, and umbilical cord blood.

Why are Embryonic Stem Cells Important?

Human embryonic stem cells are able to differentiate into virtually any other cell in the body and to reproduce themselves almost indefinitely. In theory, if stem cells can be grown and their development directed in culture, it would be possible to grow cells for the treatment of specific diseases.

An early potential application of human embryonic stem cell technology may be in drug screening and toxicology testing.

The study of human development may also benefit from embryonic stem cell research in that understanding the events that occur at the first stages of development has potential clinical significance for preventing or treating birth defects, infertility and pregnancy loss. The earliest stages of human development have been difficult or impossible to study. Human embryonic stem cells offer insights into developmental events that cannot be studied directly in humans or fully understood through the use of animal models.

What are Parthenogenetic Stem Cells and how are they different?

Parthenogenetic stem cells are pluripotent stem cells created from unfertilized human eggs through a “parthenogenesis” process. Parthenogenesis requires that an unfertilized human egg be “activated” by chemical, physical or other means. Activation results in a non-viable “parthenote” from which pluripotent parthenogenetic stem cell lines can be derived. The cell lines used by ISCO are human parthenogenetic stem cells. Currently International Stem Cell Corporation owns the largest published collection of human parthenogenetic stem cell

lines. Our research is based on perfecting proprietary techniques for deriving stem cells through parthenogenesis that result in stem cell lines that have the same capacity to become all cells found in the human body, but do not require use or destruction of a viable human embryo. Furthermore, parthenogenetic stem cells can be produced in a simplified (“homozygous”) form that enables each line to be an immunological match for millions of people. We do not obtain stem cells from fetal tissue nor does our technology require the use of discarded frozen human embryos.

Why Not Use Stem Cells Derived from Adults?

There are several approaches now in human clinical trials that utilize adult stem cells. However, these cells have limited availability and limited ability to proliferate in culture as well as risk of genetic manipulation. Therefore, obtaining clinically significant amounts of adult stem cells may prove to be difficult.

Why is Stem Cell Research Controversial?

The sources of some types of stem cells cause social and religious controversy. For example, some scientists obtain stem cells from aborted fetal tissue, causing opposition from those opposed to abortion. Another controversial source of stem cells is residual human embryos (from fertilized human eggs) that remain after vitro fertilization procedures and are used to create embryonic stem cell lines.

Is Stem Cell Research Banned in the US?

Embryonic stem cell research, in general, is not banned in the US. Work by private organizations is not limited except by the restrictions applicable to all human research. In addition, Proposition 71 in California, which voters approved in November 2004, specifically allows state funds to be used for stem cell research.

Why Not Use the Currently “Approved” Embryonic Stem Cells Lines?

Most, if not all, human embryonic stem cell lines in research now have complex (“heterozygous”) immune compositions that are likely to cause the differentiated cells to be rejected by most patients.

Why Not use Adult Cells Reprogrammed to become Pluripotent Cells?

Induced pluripotent cells (“iPSs”) benefit from not being derived from human embryos but may face a number of other limitations such as uncertainty as to which genes are turned on and off. Furthermore, like embryonic stem cells, iPSs have complex (“heterozygous”) immune compositions that are likely to cause the differentiated cells to be rejected by most patients.

Ethical Issues

The use of embryonic stem cells derived from fertilized human eggs has created an ethical debate in the US and around the world. However, since no fertilized human eggs are used in creating our stem cells and no human embryo is being created, used or destroyed, we expect that our parthenogenetic stem cells will be more readily accepted in circumstances where there are ethical concerns with using traditional embryonic stem cells.

We also have licensed worldwide rights to use a technology known as Somatic Cell Nuclear Transfer (“SCNT”) to create human stem cells. The President’s Council on Bioethics, as reported in the publication “Reproduction and Responsibility—Responsibility – The Regulation of New Biotechnologies 2004,” has agreed on a series of recommendations for the use of such technology. Countries such as the United Kingdom have made similar recommendations.

Our Technology

We have developed a proprietary process based on parthenogenesis for the creation of a new type of stem cell that has shown to exhibit the pluripotency and proliferative benefits of embryonic stem cells yet avoid the use or destruction of fertilized human eggs or embryos. Furthermore, since parthenogenetic stem cells can be created with immunogenetically identical (“homozygous”) chromosome pairs, each line has potential to be an immune match for tens of millions of patients. If such cells were to be differentiated into functional mature cells they would, theoretically, be universally applicable across a wide range of medical conditions.

We also hold licenses to three other technologies to create human pluripotent stem cells: SCNT technology (as mentioned previously); a technology that may be useful to create induced pluripotent stem cells (“iPS”); and “single blastomere technology” which uses a single cell obtained from a fertilized blastocyst to create an embryonic stem cell line. Each of these technologies has unique cell therapy applications and provides us with a broad base of technologies from which we can operate in the future.

Our Facilities

We have built the capacity to manufacture human cells for use in preclinical and clinical trials and ultimately for therapeutic use through the completion of our cGMP manufacturing laboratories in Oceanside, California and Frederick, Maryland, which is currently cGMP ready. The Oceanside laboratory is unique and designed specifically for the derivation of clinical-grade parthenogenetic stem cell lines for our stem cell bank and their differentiated derivatives for future clinical trials.

Our Products

Therapeutic Product Candidates

We are developing different cell types from our stem cells that may result in therapeutic products. We focus on applications where cell and tissue therapy is already proven but where there is an insufficient supply of functional cells or tissue. We believe that the most promising potential clinical applications of our technology are:

We are currently completing outhave completed our IND-enabling pre-clinicalpreclinical studies on our most advanced program, the development of neuronal cellneural stem cells for the treatment of Parkinson’s disease.

disease, and filed the regulatory submission to the Australian Therapeutics Goods Administration (“TGA”) to start a phase 1/2a clinical trial in Australia. Each of these product candidates will require extensive preclinical and clinical development and may require specific unforeseen licensing rights obtained at substantial cost before regulatory approval may be achieved and the products sold for therapeutic use.

Skin Care Products

ISCO’s LSC subsidiary has developed daytime, nighttimethree skincare products containing our proprietary stem cell extract that help combat the signs of aging. Daytime Defense Complex is designed to facilitate quicker cell turnover and restore skin’s natural moisture levels. Recovery Night Moisture Serum helps reduce the appearance of fine lines and wrinkles, increases skin firmness, and contributes to skin cell regeneration. Eye Firming Complex provides tightening benefits and reduces puffiness, while delivering hydration to soften lines and wrinkles. LSC has also

developed two skin cleansing and exfoliating products that are intended to complement the active ingredients in the night, day, and eye treatments, all of which use patented growth factors that have been extracted from human parthenogenic stem cells. The daytime treatment helps protectserums. Brightening Cleanser uses ultra-fine conditioning powders to help cleanse and defendbrighten the skin. Dual Action Exfoliator uses glycolic acid and microcrystals to exfoliate dead skin from environmentalcells and chronological aging. The nighttime serum helps nurture collagen and elastin and helps build firmer, smoother, younger and healthier-looking skin. The eye treatment helps firm and tighten the more fragile skin around the eyes.promote faster cell renewal.

Research Products

ISCO’s LCT subsidiary develops, manufactures and commercializes over 130 human cell culture products. These products include frozen human “primary” cells and stem cells and the reagents (called “media”) needed to grow, maintain and differentiate the cells. LCT’s scientists have used a technology called basal medium optimization to systematically produce optimized products designed to culture specific human cell types and to elicit specific cellular behaviors. These techniques also produce products that do not contain non-human animal proteins, a feature desirable to research and therapeutic markets. LCT frequently adds more products to its line. These human cell-based products are used domestically and internationally by research scientists in pharmaceutical, academic and government research organizations to study human disease and basic cell biology. LCT’s products eliminate the need for scientists to create their own cells, media and reagents or attempt to adapt “off the shelf” products to match specific experimental needs and they are superior to using animals or non-human animal cells as research tools because they are more relevant to the study of human disease. Strict quality assurance provides a high level of consistency and standardization of these products. LCT offers products that contain no animal products (“called “Xeno-free” products), allowing researchers to have better control of their experiments and to conduct research using products that ultimately can be more appropriate for therapeutic applications.

Often LCT’s research customers use our cell-based research products in their clinical research, eventually adapting them for therapeutic applications. If one of our research products is adopted by a successful producer of therapeutic cells, ISCO may become a supplier to the much larger therapeutic market through LCT’s products. This is based on the fact that once regulatory product submissions are made to the FDA and similar authorities, the media and reagents used during development cannot be changed easily after approval. These uses of LCT’s products bring opportunities to ISCO for future therapeutic products. Such is the case with LCT’s Fibrolife^® media, which CytoGraft (Novato, CA) is using as part of the process of creating its tissue engineered vascular grafts.

LCT products and applications include:

Each LCT cell product is quality tested for the expression of specific markers (to assure the cells are the correct type), proliferation rate, viability, morphology and absence of pathogens. Each cell system also contains associated donor information and all informed consent requirements are strictly followed.

LCT’s research products are marketed and sold by its internal sales force, OEM partners and LCT brand distributors in Europe and Asia.

Our Markets

Therapeutic Markets

ISCO is currently pursuing a number of scientific development programs designed to lead to the creation of new therapeutic products. We anticipate that, with their superior immune-matching characteristics, our cells will be able to reduce or eliminate the need for immune-suppression drugs and the adverse reactions they trigger in patients.

Parkinson’s disease. Parkinson’s disease (“PD”) is the second most common neurodegenerative disease and, according to the Parkinson’s Disease Foundation, there are more than one million sufferers in the United States and more than $2 billion is spent on medication. Currently

there is no cure for PD and the improvements in symptoms provided by PD drugs often diminish with time. Using our proprietary technologies and know-how, we are creating neural stem cells from hpSCs as a potential treatment of PD and potentially other central nervous system disorders in order to address this significant market opportunity.

Liver disease. Liver disease affects one in ten persons according to the American Liver Foundation, and is one of the top ten leading causes of death in the United States. There are more than 100 individual diseases of the liver; and for people with liver failure, the only effective treatment is full or partial organ transplantation. However, the demand for liver organs far exceeds the number available. According to the American Liver Foundation, over 16,000 individuals in the United States are waiting for a transplant. Using our proprietary technologies and know-how, we are creating liver cells from hpSCs that may be used to treat a variety of hepatic and metabolic liver diseases to address this significant market opportunity. Importantly, liver cell transplantation has already been used in early stage clinical trials to treat patients with liver failure and has proven especially useful as a “bridge” to keep patients alive until they can receive a whole liver transplant.

Corneal disease.disease. Corneal blindness currently affects between seven and eight million people worldwide according to the World Health Organization. Using our proprietary technologies and know-how, we are creating corneal-like structures from hpSCs. These clear hollow spheres are composed of tissue with a three-dimensional layered structure similar to what is found in normal corneal tissue. Portions or all of these tissue layers may be suitable for cornea transplantation in humans. In addition, corneal cells can be used for coating contact lenses to accelerate corneal healing.

Retinal diseases. Diseases involving retinal degeneration include age-related macular degeneration (“AMD”) and retinitis pigmentosa (“RP”). These diseases are characterized by the death of critical photoreceptor cells called rods and cones. Photoreceptor death is due to an abnormality and/or to disruption or death of supportive cells called retinal pigment epithelial (“RPE”) cells. According to the Center for Disease Control and Prevention, approximately 1.8 million Americans aged 40 and over are affected by AMD.

Skin Care Market

Anti-aging representsSkin care products play a key role in the daily healthcare routines of many consumers. Greater emphasis on advertising, broader and more integrated distribution networks, raising standards of living in emerging markets, and population aging trends in developed nations are the major factors driving the global demand for skin care products.

Global skin care market consists of (i) facial care products; (ii) body care products; and (iii) specialty needs products. Top selling products in the facial skincare category include skin brighteners, anti-aging creams and serums, toners, masks, anti-acne and sun protection products.

Facial skincare products that provide anti-aging benefits represent a significant portion of the facialglobal skincare market. Despite the recessionary economy, sales of anti-aging products continueIncreased longevity leads consumers to increase. Because consumers have limited discretionary spending, they are attracted toseek out high quality, technologically advanced skincare products that can help them maintain a youthful appearance. Anti-aging products that are innovative, technologically advanced, andbacked by scientific research remain in high demand among sophisticated consumers despite premium prices.

In response to consumer demand for superior quality skin care products, manufacturers are recommended by a professional whom they know and trust.

Innovation is presentstriving to innovate at all levels of the skincare market. In order to make claims that their products can actually diminish the signs of aging, marketers are constantly looking for new combinationsIncreasing emphasis is placed on discovery and testing of specialty ingredients—compounds and technologies that provide a demonstrable cosmetic or therapeutic effect. The category of “bio-tech” skin care is a whole new opportunity that is just beginningBiotechnology-based skincare products are gaining increasingly higher market share as consumers discover their potential to be developed.deliver safe and effective results.

Research Market

The research market for cell systems consists of scientists performing basic and applied research in the biological sciences. Basic research involves the study of cell biology and biochemical pathways. Applied research involves drug discovery, vaccine development, clinical research and cell transplantation. The domestic market can be broken into three segments: (i) academic researchers in universities and privately-funded research organizations; (ii) government institutions such as the National Institutes of Health, the US Army, the US Environmental Protection Agency and others; and (iii) industrial organizations such as pharmaceutical companies and consumer product companies. It is estimated that the combined academic and government markets comprise approximately 40% of the total market and that the industrial segment comprises approximately 60%. We believe the following are the main drivers in the research market for commercial cell systems:

The global market for human cell systems for use in basic research exceeds several hundred million dollars annually with continuing anticipated growth.

Intellectual Property

Patents

In 20142015 we were granted twofour patents, covering different aspects and applications of our proprietary parthenogenetic technology. The first patent issued in Japan, coveredand covers various aspects of obtaining human embryonic stem cells using parthenogenetically activated oocytes. We currently have patents covering this technology in United States, Israel, Russia, South Korea and South Africa and additional patent applications are pending in other countries. The second patent issued in RussiaUnited States and covers various aspects of design and construction for our proprietary cell culture medium container. The third

patent also issued in Japan and covers the methods of derivation of patient-specificdifferentiated cells from stem cell linescells. The fourth patent, also covering the methods of derivation of differentiated cells from parthenogenetic blastocysts. We currently have a patent covering this technologystem cells, was issued in Israel. the United States.

We have pending patents covering homozygous parthenogenetic stem cells that can be immune matched to millions of persons and methods for deriving them. Other patents and pending patent applications include intellectual property concerning skin care formulations and methods of manufacturing stem-cell based skin care products and methods to differentiate stem cells and methods to produce three dimensional corneal tissue constructs.cells.

In addition, we have obtained exclusive worldwide licenses to patents and patent applications from Ocata Therapeutics (formerly Advanced Cell Technologies, Inc. (“ACTC”)Technology). Our licensed and internally-generated patents provide the intellectual property rights we need to operate in the pluripotent stem cell field and to progress through the stages of creating a therapeutic stem cell product. These stages include the derivation, isolation, expansion and differentiation of stem cells. The intellectual property available to us enables us to create manufacturing methods that eliminate animal proteins in order to satisfy FDA requirements. In addition, we have rights to sell research products derived through our licensed intellectual property in order to generate income.

The majority of the patents and applications have been filed in the US and in foreign countries through the Patent Corporation Treaty or by direct country filings in those jurisdictions deemed significant to our operations. We also have an exclusive license to the only patent issued by the US Patent & Trademark Office for the creation of human Embryonic Stem cells (“hES”) using somatic cell nuclear transfer (“SCNT”) for human therapeutic use. Our currently issued patents will expire at various times commencing in 2020.

We have protected our research products and branding through both patents and trademarks. Lifeline Skin Care has filed patent applications covering its proprietary formulations and methods of using stem cells to create skin care products. ISCO has registered trademarks on its company name, logo and various product names to protect its branding investment. Lifeline Cell Technology’s products names have been protected through trademark registration and the reagent formulations are protected as trade secrets.

The patentability of human cells in countries throughout the world reflects widely differing governmental attitudes. In the US, hundreds of patents covering human embryonic stem cells have already been granted, including those on which we rely. Certain countries in Europe and Asia have taken the position that hES cells themselves are not patentable. ISCO believes that such restrictions are not appropriate as applied to parthenogenetic stem cells and is working with patent legislators in Europe to create exemptions for human parthenogenetic stem cells. As a result, we plan to file internationally wherever feasible and focus our research strategy on cells that best fit the US and foreign country definitions of patentable cells and technologies.

On December 18, 2014 the Court of Justice of the European Union (CJEU), the European Union’s highest court ruled that the Company’s core technology patent applications are not covered by the prohibition on patenting embryonic stem cells, removing the final barrier to the approval of ISCO’s parthenogenetic stem cell patents in the European Union. This final and definitive ruling by the EU’s highest court now formally separates parthenogenetic stem cells from embryonic stem cells, and removes the exclusion from patentability on the former while maintaining the ban on the later.

License Agreements

In May 2005, we entered into three exclusive license agreements (“ACT IP,” “Infigen IP,” and “UMass IP” or collectively “ACTC agreements”) with Advanced Cell Technology (“ACTC”)Ocata Therapeutics Inc. for the production of therapeutic products in the fields of diabetes, liver disease, retinal disease and the creation of research products in all fields. In February 2013, each of these license agreements was amended and restated, pursuant to which we continue to have rights to ACTC’sOcata Therapeutics’ human cell patent portfolio and non-exclusive rights to future developments in the area of diabetes and liver disease, as well as certain rights to patents covering Single Blastomere technology. A significant feature of the licensed Single Blastomere technology is a method of ethically obtaining human embryonic stem cells that allows us to isolate and differentiate hES stem cells directly from a “blastocyst”

without harming the embryo. Using other licensed technology, the hES cells can be immediately differentiated into stem cells capable of expansion and differentiation into other types of cells. Under the terms of the amendments we have also acquired additional exclusive rights in the area of parthenogenesis and the use of parthenogenetically derived stem cells for treatment of human diseases.

The agreements with ACTCOcata Therapeutics further provide that we are no longer obligated to make milestone payments or to meet any minimum research and development requirements. We will no longer pay any royalties related to the ACT IP or Infigen IP, and our obligation to pay a minimum license fee for the UMass IP has been reduced to $75,000 annually, payable in two installments to ACTC.Ocata Therapeutics.

The agreements continue until the expiration of the last valid claim within the licensed patent rights. Either party to each amended and restated license agreement may terminate the agreement for an uncured breach or we may terminate the agreements at any time with a 30 days written notice.

Research Agreements

Our scientific founder, Elena Revazova, MD, PhD, has conducted basic research at the Scientific Center for Obstetrics, Gynecology and Perinatology of the Russian Academy of Medical Sciences in Moscow, Russia. Through a research agreement, we have retained all intellectual property rights in the US and other major markets with respect to such research, while the Institute has retained such rights in Russia.

In 20132014 and 2012,2013, ISCO spent $3.6$5.4 million and $3.6 million per year on research and development activities.activities, respectively. ISCO actively pursues sponsored research agreements with local and international research organizations and has established research collaborations with collaborators from Duke University, Yale University, The Scripps Research Institute (La Jolla), and the Sanford Burnham Medical Research Institute. We are in frequent negotiations to develop collaborative research agreements with additional domestic and international research organizations from both the public and private sector. These agreements allow us to team up with nationally and internationally known research scientists to study stem cell technologies developed or licensed by ISC for possible use in therapeutic or research fields. In addition to the research collaborations mentioned above, we provide our stem cell lines to researchers at many universities and other research facilities. Ordinarily, the stem cell lines are provided without charge, but we retain the right to either an exclusive or non-exclusive right to use any technology that may be developed that is necessary in order for us to make therapeutic products based on the research that uses our cells.

In 2014 the Company signed a research agreement with Rohto Pharmaceutical Co. Ltd, (“Rohto”) the second-largest consumer health company in Japan, and a world leader in the manufacturing and marketing of pharmaceuticals, cosmetics, skincare and healthcare products. Under the terms of the agreement, Rohto will evaluate stem cell-derived human cells owned and provided by ISCO in a number of pre-clinical animal models. If the research is successful and the parties agree on remaining terms, it is anticipated that a definitive license agreement will be signed at the end of the twelve-month period of the research agreement.

Competition

The development of therapeutic and diagnostic agents for human disease is intensely competitive. Pharmaceutical companies currently offer a number of pharmaceutical products to treat Parkinson’s disease, diabetes, liver diseases, retinal disease, corneal disease and other diseases for which our technologies may be applicable. Many pharmaceutical and biotechnology companies are investigating new drugs and therapeutic approaches for the same purposes, which may achieve new efficacy profiles, extend the therapeutic window for such products, alter the prognosis of these diseases, or prevent their onset. We believe that our therapeutic products, when and if successfully developed, will compete with these products principally on the basis of improved and extended efficacy and safety and their overall economic benefit to the health care system. We believe that our most significant competitors will be fully integrated pharmaceutical companies and more established biotechnology companies. Smaller companies may also be significant competitors, particularly through collaborative arrangements with large pharmaceutical or biotechnology companies.

Some of our primary competitors in the development of stem cell therapies are Stem Cells Inc., Advanced Cell TechnologyOcata Therapeutics Inc., BioTime, Neuralstem, Inc., ReNeuron, StemCells, Inc. and ViaCyte. Our primary competitors in the skin care market are Obagi, Skinceuticals, SkinMedica, and Murad. In the field of research products, our primary competitors for human cells, media and reagents are Lonza, EMD Millipore, Life Technologies (formerly Invitrogen), StemCell Technologies, Zen-bio, PromoCell, and Specialty Media. In each of these areas many of our competitors have substantially greater resources and experience than we do.

Sales and Marketing

To date, sales of our research products have been derived primarily through our in-house sales force and via OEM and distribution contracts. Approximately 27%21% of our sales in 20132014 were from two customers. We anticipate increased sales in 2014 through our newly established distributors in Asia and India.one customer.

The skin care line was launched in November 2010 through the company’s own website—website – www.lifelineskincare.com. Since that time distribution has expanded to include destination and resort spas, dermatologists, plastic surgeons and international markets. Domestically, we plan to increase distribution of our products by increasing brand awareness, strategic partnerships, sales promotions, and public relations. Internationally, we are increasing distribution and sales through new distribution and custom product development agreements.

LCT’s research products are marketed and sold by its internal sales force, OEM partners and LCT brand distributors in Europe and Asia.

Government Regulation

Regulation by governmental authorities in the U.S. and other countries is a significant factor in development, manufacture and marketing of our proposed therapeutic and skin care products and in our ongoing research and product development activities. The nature and extent to which such regulation applies to us will vary depending on the nature of any products that may be developed by us. We anticipate that many, if not all, of our proposed therapeutic products will require regulatory approval by governmental agencies prior to commercialization. In particular, human therapeutic products are subject to rigorous preclinical and clinical testing and other approval procedures of the FDA, and similar regulatory authorities in European and other countries. Various governmental statutes and regulations also govern or influence testing, manufacturing, safety, labeling, storage and recordkeeping related to such products and their marketing. The process of obtaining these approvals and the subsequent compliance with appropriate statutes and regulations require the expenditure of substantial time and money, and there can be no guarantee that approvals will be granted.

We have made extensive progress in obtaining the necessary regulatory approvals of research protocols, informed consent documents and donor protection procedures to obtain oocytes in the U.S. for the production of our parthenogenetic stem cell bank. These approvals include: federally mandated Institutional Review Board (IRB) and State of California required Stem Cell Research Oversight (SCRO) committee.

Currently the U.S. government, though NIH appropriations restrictions, prohibits the use of federal funds in research involving parthenogenetic stem cells. Since we cannot receive federal funds for our stem cell research, we have decided to work with various foundations who are involved with stem cell research.

FDA Approval Process

Prior to commencement of clinical studies involving humans, preclinical testing of new pharmaceutical products is generally conducted on animals in the laboratory to evaluate the potential efficacy and safety of the product candidate. The results of these studies are submitted to the FDA as a part of an Investigational New Drug (“IND”) application, which must become effective before clinical testing in humans can begin. Typically, human clinical evaluation involves a time-consuming and costly three-phase process. In Phase I, clinical trials are

conducted with a small number of people to establish safety pattern of drug distribution and metabolism within the body. In Phase II, clinical trials are conducted with groups of patients afflicted with a specific disease in order to determine preliminary efficacy, possible dosages and expanded evidence of safety. In some cases, an initial trial is conducted in diseased patients to assess both preliminary efficacy and preliminary safety and patterns of drug metabolism and distribution, in which case it is referred to as a Phase I/II trial. In Phase III, large-scale, multi-center, comparative trials are conducted with patients afflicted with a target disease in order to provide enough data to demonstrate the efficacy and safety required by the FDA. The FDA closely monitors the progress of each of the three phases of clinical testing; and may, at its discretion, re-evaluate, alter, suspend or terminate the testing based upon the data which have been accumulated to that point and its assessment of the risk/benefit ratio to the patient. Monitoring of all aspects of the study to minimize risks is a continuing process. All adverse events must be reported to the FDA.

The results of the preclinical and clinical testing on a non-biologic drug and certain diagnostic drugs are submitted to the FDA in the form of a New Drug Application (“NDA”) for approval prior to commencement of commercial sales. In the case of vaccines or gene and cell therapies, the results of clinical trials are submitted as a Biologics License Application (“BLA”). In responding to a NDA or BLA, the FDA may grant marketing approval, request additional information or refuse to approve if the FDA determines that the application does not satisfy its regulatory approval criteria. There can be no assurance that approvals will be granted on a timely basis, if at all, for any of our proposed products.

In November 2014, in an important ruling the FDA cleared ISCO’s human parthenogenetic stem cells line for investigational clinical use. This was a necessary step in the process of eventually advancing stem cell therapies based on ISCO’s core technology into clinical development. Although the Phase I trial for the Parkinson’s Disease program is anticipated to be conducted in Australia, and therefore not subject to FDA oversight, future studies will be carried out in the United States where this approval is necessary.

European and Other Regulatory Approval

Whether or not FDA approval has been obtained, approval of a product by comparable regulatory authorities in Europe and other countries will likely be necessary prior to commencement of marketing the product in such countries. The regulatory authorities in each country may impose their own requirements and may refuse to grant an approval, or may require additional data before granting it, even though the relevant product has been approved by the FDA or another authority. As with the FDA, the regulatory authorities in the European Union (“EU”) and other developed countries have lengthy approval processes for pharmaceutical products. The process for gaining approval in particular countries varies, but generally follows a similar sequence to that described for FDA approval. In Europe, the European Committee for Proprietary Medicinal Products provides a mechanism for EU-member states to exchange information on all aspects of product licensing. The EU has established a European agency for the evaluation of medical products, with both a centralized community procedure and a decentralized procedure, the latter being based on the principle of licensing within one member country followed by mutual recognition by the other member countries.

Other Regulations

We are also subject to various U.S. federal, state, local and international laws, regulations and recommendations relating to the treatment of oocyte donors, the manufacturing environment under which human cells for therapy are derived, safe working conditions, laboratory and manufacturing practices and the use and disposal of hazardous or potentially hazardous substances, including radioactive compounds and infectious disease agents, used in connection with our research work. We cannot accurately predict the extent of government regulation which might result from future legislation or administrative action.

Other Regulations for Lifeline Skin Care

The Federal Food, Drug and Cosmetic Act (“FFDCA”) and the Fair Packaging and Labeling Act (“FPLA”) provide the regulatory framework for selling cosmetics. The FFDCA oversees the safety of cosmetics. The FPLA ensures that the labeling is not false or misleading and includes all relevant information in a prominent and conspicuous manner.

Safety and efficacy testing of the products is performed by independent third party testing organization.

Employees

In addition to our fivefour executive officers, we utilize the services of 4235 full-time staff members.

Properties

We have established our primary research facility in 8,215 square feet of leased office and laboratory space in Oceanside, California. Our lease for this facility expires in August 2016. The current base rent is $8,846 per month. The facility has leasehold improvements which include GMP (current Good manufacturing Practices) level clean rooms designed for the derivation of clinical-grade stem cells and their differentiated derivatives, research laboratories for our stem cell differentiation studies and segregated rooms for biohazard control and containment of human donor tissue. The GMP clean rooms and the associated quality systems provide a “pilot manufacturing laboratory” that we believe will be uniquely suited for the creation, culture and differentiation of parthenogenetic stem cells for early stage clinical trials. We believe that this facility is well suited to meet our research, development and pre-clinical and clinical therapeutic production needs. However, we will need larger GMP manufacturing laboratories should any one of our therapeutic cells move to larger clinical trials or full-scale therapeutic manufacture. The monthly base rent will increase by 3% annually on the anniversary date of the agreement.

In addition to the primary research facility lease, we entered into a lease with S Real Estate Holding LLC to allow the Company to expand into new corporate offices located in Carlsbad, California. The new building is used for administrative purposes, but could also be used for research and development purposes if such space is needed in the future. The lease initially covered approximately 4,653 square feet, starting on March 1, 2011 and was amended to cover approximately 8,199 square feet effective July 1, 2011. The lease expires on February 29, 2016, subject to the Company’s right to extend the term for up to five additional years. The Company began paying rent at an initial rate of $5,118 per month and the rate was amended effective July 1, 2011 and January 1, 2013 to account for additional square footage occupied by the Company. The current base rent is $11,837 per month. The monthly base rent will increase by 3% annually on the anniversary date of the agreement. The Company is also obligated to pay a portion of the utilities for the building and increases in property tax and insurance.

During 2010 we utilizedWe lease a 3,2405,520 square foot laboratory in Walkersville, Maryland. Our lease for this facility expired in March 2011, and we moved into a new manufacturing facility in Frederick, Maryland, which we use for laboratory and administrationadministrative purposes. The current base rent is $11,105.$8,865. The initial term of the lease endsexpires in December 2015 and there is an option for an additional five years. The laboratory is being used to develop and manufacture our research products and the administration facility will be used for sales and marketing and general administration purposes. Our manufacturing laboratory space has clean rooms and is fitted with the necessary water purification, refrigeration, labeling equipment and standard manufacturing equipment to manufacture, package, store, and distribute media products. There is also a quality control and cell culture laboratory outfitted with the necessary cell isolation equipment, incubators, microscopes and standard cell culture equipment necessary to isolate and culture cells and conduct quality control tests to produce superior cell culture products.

Legal Proceedings

We are not party to any material legal proceedings.

MANAGEMENT

Our executive officers and directors, as of June 15, 2015, are as follows:

Officers

Andrey Semechkin, Ph.D., Co-Chairman and CEO, has been a Director of the Company since December 2008. He has served as our Chief Executive Officer since November 2009, having previously served as Executive Vice President and as Chief Business Officer at various times since he joined us in December 2008. Dr. Semechkin is a specialist in system analysis, strategic planning and corporate management. He is a member of the Russian Academy of Sciences and has been Deputy Director of Institute of System Analysis since 2004. Professor Semechkin was awarded the Russian Government Award in Science and Technology in 2006 and has written several scientific books. He has over 20 years’ experience creating and managing businesses across different industries and scientific sectors.

Jay Tibor Novak, Chief Financial Officer, Mr. Novak has over 18 years of experience in finance and accounting. He joined the Company in July 2011 and had been serving as Director of Finance since May 2012. Prior to joining the Company, Mr. Novak served as Financial Reporting Manager at Volcano Corporation, a medical device company, from April 2010 to June 2011, as a financial consultant from September 2009 until March 2010, and as Associate Director of Finance at Nanogen, Inc. from April 2007 until August 2009. He previously served as Associate Director of Finance at Elan Pharmaceuticals and as Assistant Director of Finance at Isis Pharmaceuticals. He is a certified public accountant, having begun his career with Deloitte & Touche, LLP. He received a B.S. in Accountancy from California State University, Long Beach, and an MBA from University of California, Irvine.

John Simon Craw, Ph.D., Executive Vice President of Business Development obtained his Ph.D. in Chemistry from the University of Manchester and began his career at the University of Rio de Janeiro followed by positions at the University of Sydney and the University of Manchester. He has over 18 years of experience in research and development as well as operations and information technology at Merck, Astra-Zeneca and Novartis and as head of R&D Informatics and Regulatory Operations at ACADIA Pharmaceuticals. Dr. Craw’s has numerous scientific publications, has been a guest on numerous radio and television programs including National Public Radio and Fox News, and is a frequent speaker at international conferences.

Ruslan Semechkin, Ph.D, Chief Scientific Officer, became a Director in October 2008. He has served as our Chief Scientific Officer since 2013, having previously served in various scientific and management positions (including as CEO of Lifeline Skin Care and as Senior Research Scientist) since he joined us in December 2008. Dr. Semechkin was trained in medical genetics, stem cell biology and international business administration, and holds an M.S. degree from Faculty of Fundamental Medicine of Moscow State University. He earned his Ph.D. degree in Physiology from Anokhin Research Institute of Normal Physiology, Russian Academy of Medical Sciences. Dr. Semechkin is a well-known speaker on stem cell biology, including the use of stem cells for neurology and skin regeneration. He has publications in the field of clinical and molecular biology, and is author of various patent applications. Dr. Ruslan Semechkin is the son of Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer.

Sofya Bakalova, Vice President, Legal Affairs & Operations, received her J.D. from the University of Miami School of Law and has experience in various aspects of corporate and biotechnology law, regulatory affairs, project management, and business operations. After joining the Company in March of 2011, she has held a variety of business and legal roles, including in-house counsel, advisor to the CEO, and Vice Chairman of the Board of Directors for Lifeline Skin Care.Care and, since 2015, Vice President Legal Affairs and Operations. Ms. Bakalova holds a Bachelor’s degree in Economics from San Francisco State University and hasa law degree from the University of Miami School of Law. She worked in the banking and finance industries prior to beginning her legal career.

Directors

Andrey SemechkinJay Tibor Novak,, Ph.D., Co-Chairman Chief Financial Officer, has over 18 years of experience in finance and CEO, has been a director ofaccounting. He joined the Company in July 2011 and had been serving as Director of Finance since December 2008. Dr. Semechkin isMay 2012 until he became Chief Financial Officer in April 2013. In May 2015, Mr. Novak joined MabVax Therapeutic Holdings and has remained our CFO in a specialist in system analysis, strategic planningconsulting capacity for an interim period of a few months until we determine his replacement. Prior to joining the Company, Mr. Novak served as Financial Reporting Manager at Volcano Corporation, a medical device company, from April 2010 to June 2011, as a financial consultant from September 2009 until March 2010, and corporate management.as Associate Director of Finance at Nanogen, Inc. from April 2007 until August 2009. He previously served as Associate Director of Finance at Elan Pharmaceuticals and as Assistant Director of Finance at Isis Pharmaceuticals. He is a membercertificate public accountant, having begun his career with Deloitte & Touche, LLP. He received a B.S. in Accountancy from California State University, Long Beach, and an MBA from University of California, Irvine.

Directors

See the section entitled “Officers” above, for a description of the Russian Academybusiness experience and educational background of Sciences and has been Deputy Director of Institute of System Analysis from 2004 to 2011. Professor Semechkin was awarded the Russian Government Award in Science and Technology in 2006 and has written several scientific books. He has over 20 years’ experience creating and managing businesses across different industries and scientific sectors. Dr. Andrey Semechkin is the father of Dr.and Ruslan Semechkin, Chief Scientific Officer and one of our directors.Semechkin.

Donald A. Wright, Co-Chairman, became a director in March 2007. Mr. Wright was previously the Chairman and Founder of Everett, Washington-based Confluence Capital Group Inc., which provided consulting services to institutional investors, debt holders and public and private companies. On January 1, 2010, Mr. Wright became Chief Executive Officer and President of ISIS, Inc. which provides various services under contract to various agencies of the US Government and armed services. From 1995 until 2006, Mr. Wright was Chief Executive Officer and President of Pacific Aerospace & Electronics, Inc., an engineering and manufacturing company that he helped to found and that designs, manufactures and sells components primarily for the aerospace, defense and transportation industries.

Charles J. Casamento has been a director since June 2010. Mr. Casamento is currently Executive Director and Principal of The Sage Group, a healthcare advisory group specializing in mergers, acquisitions, and partnerships between biotechnology companies and pharmaceutical companies. He was the president and CEO of Osteologix, Inc., a public biopharmaceutical company developing products for treating osteoporosis, from 2004 through 2007. From 1999 through 2004, he served as chairman of the board, president and CEO of Questcor Pharmaceuticals, Inc. Mr. Casamento formerly served as RiboGene, Inc.’s president, CEO and chairman of the board from 1993 through 1999 until it merged with Cypros to form Questcor. He was co-founder, president and CEO of Interneuron Pharmaceuticals, Inc. (Indevus), a biopharmaceutical company, from 1989 until 1993. Mr. Casamento has also held senior management positions at Genzyme Corporation, where he was senior vice president, pharmaceuticals and biochemicals; American Hospital Supply, where he was vice president of business development and strategic planning for the Critical Care Division; Johnson & Johnson, Hoffmann-LaRoche, Inc. and Sandoz Inc. Mr. Casamento also serves on the Boards of Directors of CORTEX Pharmaceuticals, SuperGen, Inc. and VIVUS, Inc. He holds a bachelor’s degree in Pharmacy from Fordham University and an M.B.A. from Iona College and was originally licensed to practice pharmacy in the states of New York and New Jersey.

Paul V. Maier became a director in July 2007 and has over 20 years of experience as a senior executive in biotechnology and pharmaceutical companies. From November 2009 through June 2014, he served as Chief Financial Officer of Sequenom, Inc., a publicly held company serving the discovery, clinical research, and molecular diagnostics market. From February 2007 until November 2009, he served as an independent financial consultant. Previously, Mr. Maier was Senior Vice President and Chief Financial Officer of Ligand Pharmaceuticals, Inc., a commercial stage biopharmaceutical company, a position he held from 1992 to 2007. From 1990 to 1992, Mr. Maier served as Vice President, Finance of DFS West, a division of DFS Group, LP a private multinational retailer. From 1984 to 1990, Mr. Maier was employed by ICN Pharmaceuticals, a pharmaceutical and biotechnology research products company, where he held various executive positions in finance and general management in ICN as well as SPI Pharmaceuticals, a publicly held subsidiary. Mr. Maier currently serves on the Board of Directors of both Apricus Biosciences and MabVax Therapeutics and Biological Dynamics. Mr. Maier received an MBA from Harvard Business School and a BS from Pennsylvania State University.

Ruslan Semechkin, Ph.D, Director, Chief Scientific Officer, became a Director in October 2008. Dr. Semechkin was trained in medical genetics, stem cell biology and international business administration, and holds an M.S. degree from Faculty of Fundamental Medicine of Moscow State University. He earned his Ph.D. degree in Physiology from Anokhin Research Institute of Normal Physiology, Russian Academy of Medical Sciences. Dr. Semechkin is a well-known speaker on stem cell biology, including the use of stem cells for neurology and skin regeneration. He has publications in the field of clinical and molecular biology, and is author of various patent applications. Dr. Ruslan Semechkin is the son of Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer.

Director Independence

The Board of Directors has determined that each of Mr. Maier, Mr. Wright and Mr. Casamento satisfy the independence requirements specified in the listing requirements of Nasdaq Marketplace Rules.

Compensation Committee Interlocks and Insider Participation

No member of our compensation committee is or has at any time during the past year been one of our officers or employees. None of our executive officers currently serves or in the past year has served as a member of the board of directors or compensation committee of any entity that has one or more executive officers serving on our Board of Directors or compensation committee.

EXECUTIVE COMPENSATION

The following table sets forth information concerning the compensation earned by our most highly compensated executive officers during the fiscal years ended December 31, 2014, and 2013, who are sometimes referred to herein as our named executive officers.

2014 Summary Compensation Table

On November 10, 2014 we granted options as follows: Dr. Andrey Semechkin 60,000 shares, Dr. Craw 60,000 shares, and Dr. Ruslan Semechkin 60,000 shares at an exercise price of $0.106. These options expire on November 10, 2024. All of the shares in this grant were granted under the 2010 Equity Participation Plan. The options issued are subject to plan restrictions and will vest 25% at the one-year anniversary on November 10, 2014, and then 1/48th on each month commencing on December 10, 2015.

On May 8, 2014 we granted options as follows: Dr. Andrey Semechkin 1,250,000 shares, Dr. Craw 100,000 shares, and Dr. Ruslan Semechkin 1,000,000 shares at an exercise price of $0.155. These options expire on May 8, 2024. All of the shares in this grant were granted under the 2010 Equity Participation Plan. The options issued are subject to plan restrictions and will vest 25% at the one-year anniversary on May 8, 2014, and then 1/48th on each month commencing on June 8, 2015.

On April 9, 2013 we granted options as follows: Dr. Andrey Semechkin 100,000 shares, Dr. Craw 75,000 shares, and Dr. Ruslan Semechkin 70,000 shares at an exercise price of $0.27. These options expire on April 9, 2023. All of the shares in this grant were granted under the 2010 Equity Participation Plan. The options issued are subject to plan restrictions and will vest 25% at the one-year anniversary on April 9, 2014, and then 1/48th on each month commencing on May 9, 2014.

Fair Value Assumptions

The following table sets forth the assumptions used in 2014 and 2013 in the calculation of the option awards presented in our “Summary Compensation Table.” For all periods presented, the fair value of share-based awards of options were estimated at the date of grant using the Black-Scholes valuation model.

OUTSTANDING EQUITY AWARDS AT FISCAL YEAR-END

The following table sets forth certain information with respect to the value of all unexercised options previously awarded to our named executive officers as of December 31, 2014:

Outstanding Equity Awards at December 31, 2014

(8)	The stock option will vest 25% at the one year anniversary on May 8, 2015, and then 1/48th on each month commencing on June 8, 2015.

(9)	The stock option will vest 25% at the one year anniversary on November 10, 2015, and then 1/48th on each month commencing on December 10, 2015.

2006 Equity Participation Plan

The 2006 Equity Participation Plan (also referred to as “2006 Stock Plan”) provides for the grant of stock options or restricted stock and other equity based awards to our employees, officers, directors and consultants. Options may be either “incentive stock options” or non-qualified options under the federal tax laws and will have an exercise price equal to at least fair market value as of the grant date. A total of 15,000,000 shares of common stock have been reserved for issuance under the 2006 Stock Plan, subject to adjustments for certain corporate transactions or events. The purpose of the 2006 Stock Plan is to enable us to offer non-employee directors, officers, other key employees and consultants of the Company and our subsidiaries and affiliates, equity-based incentives, thereby attracting, retaining and rewarding these participants and strengthening the mutuality of interests between these participants and our stockholders. The 2006 Stock Plan is administered by the board of directors as a whole. The board of directors has the power to determine the terms of any restricted stock or options granted under the 2006 Stock Plan. Grants under the 2006 Stock Plan are generally not transferable, and each stock option is generally exercisable during the lifetime of the optionee only and can only be exercised by such optionee.

Equity Awards Issued Outside the 2006 Equity Participation Plan

In 2009, options to purchase 10,257,593 shares were issued outside the 2006 Equity Participation Plan. These grants include 8,620,715 shares that were issued with an exercise price of $.62 per share and 1,636,878 that were issued with an exercise price of $.59 per share.

2010 Equity Participation Plan

The 2010 Equity Participation Plan (also referred to as “2010 Stock Plan”) provides for the grant of stock options or restricted stock and other equity based awards to our employees, officers, directors and consultants. Options may be either “incentive stock options” or non-qualified options under the federal tax laws and will have an exercise price equal to at least fair market value as of the grant date. A total of 18,000,000180,000,000 shares of common stock have been reserved for issuance under the 2010 Stock Plan, subject to adjustments for certain corporate transactions or events. The purpose of the 2010 Stock Plan is to enable us to offer non-employee directors, officers, other key employees and consultants of the Company and our subsidiaries and affiliates, equity-based incentives, thereby attracting, retaining and rewarding these participants and strengthening the mutuality of interests between these participants and our stockholders. The 2010 Stock Plan is administered by the board of directors as a whole. The board of directors has the power to determine the terms of any restricted stock or

options granted under the 2010 Stock Plan. Grants under the 2010 Stock Plan are generally not transferable, and each stock option is generally exercisable during the lifetime of the optionee only and can only be exercised by such optionee.

Stock Option Grants

The Board may grant options qualifying as incentive stock options under the Internal Revenue Code and nonqualified stock options. The term of an option will be fixed by the Board, but will not exceed ten years (or five years in the case of an incentive stock option granted to a person beneficially owning shares representing 10% or more of the total combined voting power of all classes of our stock, referred to as a 10% stockholder). The option price for any option will not be less than the fair market value of the common stock on the date of grant (or 110% of the fair market value in the case of an incentive stock option granted to a 10% stockholder). Generally, the fair market value will be the closing price of the common stock on the applicable trading market. Payment for shares purchased upon exercise of a stock option must be made in full at the time of purchase. Payment may be made (i) in cash; (ii) in a cash equivalent acceptable to the Board; (iii) by the transfer to us of shares owned by the participant for at least six months on the date of transfer; (iv) if the common stock is traded on an established securities market, the board may approve payment of the exercise price by a broker-dealer or by the option holder with cash advanced by the broker-dealer if the exercise notice is accompanied by the option holder’s written irrevocable instructions to deliver the common stock acquired upon exercise of the option to the broker-dealer; or (v) any other method acceptable to the Board and in compliance with applicable laws.

Restricted Stock

The board is authorized to grant restricted stock. Restricted stock is a grant of shares of common stock which may not be sold or disposed of and which shall be subject to such risks of forfeiture and other restrictions as the board may impose. Unless otherwise determined by the board, the purchase price for any restricted stock grant will be not less than 85% of the fair market value of common stock on the date of grant or at the time the purchase is consummated (or 100% of the fair market value in the case of restricted stock granted to a 10% stockholder). Generally, the fair market value will be the closing price of the common stock on the applicable trading market. Payment for shares purchased pursuant to a restricted stock grant may be made in (i) cash at the time of purchase; (ii) at the discretion of the board, according to a deferred payment or other similar arrangement with the participant; or (iii) in any other form of legal consideration that may be acceptable to the board in its discretion. A participant granted restricted stock generally has all of the rights of a stockholder of the Company, unless otherwise determined by the board.

Option Exercises and Stock Vested During Last Fiscal Year

There were no option exercises or stock vested by named executive officers during the fiscal year ended December 31, 2014.

2014 DIRECTOR COMPENSATION

The following table sets forth information concerning the compensation earned during the last fiscal year by each individual who served as a director at any time during the fiscal year, other than directors who are listed in the Summary Compensation Table (directors who are also employees do not receive any additional compensation for service on the Board):

In March 2013,May 2015, the Board revised the compensation program for non-employee directors. Currently, non-employee directors will receive (i) annual cash compensation of $32,500 (with Mr. Wright receiving an additional $25,000 per year for his service as Co-Chairman),; (ii) 162,500an annual grant of 200,000 shares of restricted stock, with one quarter vestingCommon Stock; such grant to be made in fully-vested shares at the end of each fiscal quarter, (iii) additional restricted stock at each quarter end to make quarterly total compensation equal $8,125 given the then current stock price, and (iv) 40,000 shares of restricted stock granted on the date of the Annual Meeting and vesting on the earlier of twelve months from the date of grant or the date of the next annual meeting (with Mr. Wright receiving an additional 25,000 restricted(or, if earlier, upon a change-in-control); (iii) quarterly grants of stock for his service as Co-Chairman).effective on the last day of each quarter, with the number of shares of stock equal to $8,125 divided by the average closing price of the Common Stock of the Company over the five trading days preceding the date of grant.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Pursuant to our Code of Business Conduct and Ethics, our executive officers, directors, and principal stockholders, including their immediate family members and affiliates, are prohibited from entering into transactions which create, or would appear to create, a conflict of interest with us. Our Audit Committee is responsible for reviewing and approving related party transactions. Our Audit Committee shall approve only those agreements that, in light of known circumstances, are in, or are not inconsistent with, our best interests, as our Audit Committee determines in the good faith exercise of its discretion.

Except with respect to the transactions described below, since January 1, 2012, none of our directors or executive officers, nor any person who beneficially owns, directly or indirectly, shares carrying more than 10% of the voting rights attached to our outstanding shares, nor any of our promoters, nor any relative or spouse of any of the foregoing persons entered into a transaction or is party to a currently proposed transaction in which the amount involved exceeded the lesser of $120,000 or one percent of the average of our total assets at year end for the last two completed fiscal years. None of our directors or executive officers is indebted to us.

From time to time, various persons, including certain officers, directors, principal shareholders, and their affiliates, have advanced funds to Lifeline and/or ISC California for operating expenses. As of September 30, 2014, all such advances have been repaid in full.

As part of the Series D Financing Agreement,May 31, 2015, we have recognized in our 2012 and 2011 financial statements dividends paid of $55,123 and $99,726 in each of those fiscal years to X-Master, Inc. (an entity affiliated with Dr. Andrey Semechkin and Dr. Ruslan Semechkin, both of whom are directors and executive officers). Additionally, in 2012 and 2011, dividends of $181,907 and $329,095, respectively, were paidhad an outstanding related party note payable to Dr. Andrey Semechkin, as partour Co-Chairman and CEO, in the amount of $2,262,000. This note, which was issued on May 12, 2015, bears interest at the Series D Financing Agreement.annual rate of one-half of a percent and is due on August 10, 2015.

We are parties to an operating lease for our corporate offices in Carlsbad, California with S Real Estate Holdings LLC. S Real Estate Holdings LLC is owned by Dr. Andrey Semechkin, the Company’s Chief Executive Officer and Co-Chairman of the Board of Directors. During fiscal years 2013 and 2012, the Company recorded $137,000 and $113,000 in rent expense, respectively, related to the facility lease arrangement with related parties.

As previously disclosed, on March 9, 2012, to obtain funding for working capital purposes, we entered into a Series G Preferred Stock Purchase Agreement with AR Partners, LLC to sell 5,000,000 shares of our Series G Preferred Stock (“Series G Preferred”) at a price of $1.00 per Series G Preferred share, for a total purchase price of $5,000,000. AR Partners is an affiliate of Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer, and Dr. Ruslan Semechkin, our Chief Scientific Officer and director. The sale of the Series G Preferred was completed on March 9, 2012.

On January 22, 2013, to obtain funding for working capital purposes, we entered into a Securities Purchase Agreement with Dr. Andrey Semechkin and Dr. Simon Craw to sell a total of 10,125,000 shares of common stock at a price of $0.20 per share, for a total purchase price of $2,025,000. Dr. Andrey Semechkin is our Co-Chairman and Chief Executive Officer. Dr. Simon Craw is our Executive Vice President Business Development. The sale of the shares of common stock was completed on January 22, 2013. In connection with the sale of these shares we issued to each purchaser a warrant, exercisable for a period of 5 years, to purchase (at an exercise price of $0.20 per share) a number of shares of common stock equal to 50% of the shares purchased by that purchaser, for a total of 5,062,500 shares subject to the warrants.

On March 12, 2013, to obtain funding for working capital purposes, we entered into a Securities Purchase Agreement with certain investors, including Dr. Andrey Semechkin, to sell a total of 5,000,000 shares of common stock at a price of $0.20 per share, for a total purchase price of $1,000,000. Dr. Andrey Semechkin is our Co-Chairman and Chief Executive Officer and purchased $100,000 worth of common stock. Each of the other investors has had a long-standing relationship with us and has closely followed the Company. The sale of the shares of common stock was completed on March 12, 2013. In connection with the sale of these shares we issued to each investor a warrant, exercisable for a period of 5 years, to purchase (at an exercise price of $0.20 per share) a number of shares of common stock equal to 50% of the shares purchased by that investor, for a total of 2,500,000 shares subject to the warrants.

On July 24, 2013, to obtain funding for working capital purposes, we entered into a Securities Purchase Agreement with certain investors, including Dr. Andrey Semechkin and Dr. Ruslan Semechkin, to sell a total of 20,000,000 Units, a Unit comprising a share of common stock and a Series A Warrant exercisable for a share of common stock at a price of $0.15 per Unit. In addition, the purchase price included a Series B Warrant exercisable for an additional Unit at an exercise price of $0.15 per Unit, subject to adjustment. Dr. Andrey Semechkin is our Co-Chairman and Chief Executive Officer and purchased $899,850 worth of Units, and Dr. Ruslan Semechkin, our Chief Scientific Officer and director and purchased $100,150 worth of Units. The Series A Warrants are exercisable for a period of 5 years; the Series B Warrants expired on October 24, 2013. During October 2013, Dr. Andrey Semechkin

exercised $400,000 worth of Series B Warrants prior to expiration; and Dr. Ruslan Semechkin exercised $96,800 worth of Series B Warrants prior to expiration. The exercise price of the Series B Warrants was adjusted to $0.1452 per Unit under the terms of the agreement. Prior to the expiration of the Series B Warrants in October 2013, other holders exercised $1,957,360 worth of Series B Warrants.

On May 29, 2014, to obtain funding for working capital purposes, we entered into a securities purchase agreement with Dr. Andrey Semechkin and Dr. Ruslan Semechkin, our Co-Chairman and Chief Executive Officer and Chief Scientific Officer and director, respectively, to sell a total of 3,333,333 shares of common stock at a price of $0.15 per share, for a total purchase price of $500,000.

On June 11, 2014, we entered into a series of warrant exchange agreements (the “Warrant Exchange Agreements”) with the holders of its Series A Warrants and Placement Agent Warrants that were issued by us pursuant to the 2013 S-1 July Registered Offering. Under the Warrant Exchange Agreements, we agreed to issue a total of 44,665,783 shares of common stock (the “Exchange Shares”) to the warrant holders in exchange for the cancellation of the Series A Warrants to purchase 36,554,822 shares of common stock and the Placement Agent Warrants to purchase 666,666 shares of common stock and Series A Warrants. Dr. Andrey Semechkin and Dr. Ruslan Semechkin, the Company’s Co-Chairman and Chief Executive Officer and Chief Scientific Officer and director, respectively, participated on the same terms as the other warrant holders, agreeing to exchange Series A Warrants to purchase 10,088,154 shares of common stock for 12,105,784 shares of common stock. The closing of the transaction occurred on June 16, 2014 with the issuance of the Exchange Shares. Upon settlement of the exchange transaction, there were no remaining Series A Warrants or Placement Agent Warrants outstanding.

On June 26, 2014, to obtain funding for working capital purposes, we entered into a securities purchase agreement with Dr. Andrey Semechkin and Dr. Ruslan Semechkin, our Co-Chairman and Chief Executive Officer and Chief Scientific Officer and director, respectively, to sell a total of 5,500,000 shares of common stock at a price of $0.10 per share, for a total purchase price of $550,000.

On August 6, 2014 to obtain funding for working capital purposes, we entered into a securities purchase agreement with Dr. Andrey Semechkin and Dr. Ruslan Semechkin, our Co-Chairman and Chief Executive Officer and Chief Scientific Officer and director, respectively, to sell a total of 6,000,000 shares of common stock at a price of $0.10 per share, for a total purchase price of $600,000.

From August 29, 2014 through October 10, 2014, we issued 120,000 shares of common stock to three executive officers of the Company, for an aggregate of $12,000.

On September 10, 2014 to obtain funding for working capital purposes, we entered into a securities purchase agreement with Dr. Andrey Semechkin and Dr. Ruslan Semechkin, our Co-Chairman and Chief Executive Officer and Chief Scientific Officer and director, respectively, to sell a total of 4,444,445 shares of common stock at a price of $0.09 per share, for a total purchase price of $400,000.

On October 14, 2014, we closed a private placement of Series H-1 and Series H-2 preferred stock and warrants, convertible and exercisable, respectively, into shares of our common stock, for gross proceeds of $2,500,000. The investors in the Private Placement included institutional investors and Andrey and Ruslan

Semechkin, our Chief Executive Officer and Co-Chairman and Chief Scientific Officer and Director, respectively. In this transaction we also issued Series A Warrants to purchase up to approximately 38.8 million shares of common stock at a current exercise price of $0.0576 per share with a term of five and 1/2 years, Series B Warrants to purchase up to approximately 38.8 million shares of common stock at an initial exercise price of $0.06447 per share with a term of six months and Series C Warrants to purchase up to approximately 38.8 million shares of common stock at an initial exercise price of $0.06447 per share with a term of twelve months.

On December 22, 2014, we issued 5,894,214 shares of common stock to Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer, upon his exercise of Series B Warrants at an exercise price of $0.0576 per share for total proceeds of $339,506.

On February 23, 2015, we issued 1,861,331 shares of common stock to Dr. Ruslan Semechkin, the Company’s Chief Scientific Officer and director, upon his exercise of Series B Warrants at an exercise price of $0.0448 per share for total proceeds of $83,388.

On March 31, 2015, we issued 7,755,545 shares of common stock to Dr. Andrey Semechkin, our Co-Chairman and Chief Executive Officer and Dr. Ruslan Semechkin, the Company’s Chief Scientific Officer and director, upon their exercise of Series C Warrants at an exercise price of $0.0448 per share for total proceeds of $347,448

PRINCIPAL STOCKHOLDERS

The following table sets forth information regarding the beneficial ownership of our common stock and our preferred stock as of December 31, 2014,June 1, 2015, by (i) each person who is known by us to beneficially own 5% or more of our common stock or 5% or more of our preferred stock, (ii) each of our directors and named executive officers, and (iii) all executive officers and directors as a group. In general, a person is deemed to be a “beneficial owner” of a security if that person has or shares the power to vote or direct the voting of such security, or the power to dispose or to direct the disposition of such security. A person is also deemed to be a beneficial owner of any securities of which the person has the right to acquire beneficial ownership within 60 days. To the best of our knowledge, all persons named have sole voting and investment power with respect to such shares, except as otherwise noted.

Other than for matters adversely affecting the rights and preferences of the preferred stock, the shares of our preferred stock (other than shares of Series H-1 and Series H-2 preferred stock, which is non-voting) vote together with the shares of common stock on most matters, with the shares of preferred stock entitled to cast a number of votes equal to the number of shares of common stock into which the shares of preferred stock could be converted. As of DecemberMay 31, 20142015, there were a total of 5,302,0255,300,960 shares of preferred stock outstanding that were convertible into a total of 141,046,707148,417,318 shares of common stock. Dr. Andrey Semechkin and Dr. Ruslan Semechkin, either directly or through entities that they control, beneficially own a total of 5,000,543 shares of preferred stock, that could be converted into a total of 110,122,179 shares of common stock. As such, Dr. Andrey Semechkin and Dr. Ruslan Semechkin control approximately 95.1% of the voting power of the preferred stock. The shares of common stock issuable upon conversion of the preferred stock are reflected in the following table.

In computing the number of shares of Common Stock beneficially owned by a person and the percentage ownership of such person, shares of Common Stock subject to warrants or options held by that person that are currently exercisable or exercisable within 60 days of DecemberMay 31, 20142015 were deemed to be outstanding, and shares of preferred stock owned by such person and convertible into Common Stock were deemed to be converted into Common Stock. Such shares were not deemed to be outstanding, however, for the purpose of computing the percentage ownership of any other person.

Stock Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

(3)	Includes shares issuable upon conversion of outstanding shares of preferred stock and warrants and options to purchase shares of our common stock exercisable within 60 days of DecemberMay 31, 20142015 in the following amounts:

Dr. Andrey Semechkin, 137,968,517151,457,682 shares; Dr. Craw, 1,088,0751,278,554 shares; Dr. Ruslan Semechkin, 137,968,517151,457,682 shares; Mr. Casamento, 150,000 shares; Mr. Maier, 260,000 shares; Mr. Wright, 360,000 shares; and All Executive Officers and Directors as a Group, 140,004,192153,645,501 shares.

(4)

The business address for X-Master, Inc. is 1 Overlook Drive, Unit 11, Amherst, New Hampshire 03031.X-Master Inc. is owned by Dr. Andrey Semechkin. Dr. Ruslan Semechkin is the President of X-Master, Inc. The shares held by X-Master are all issuable upon conversion of outstanding shares of preferred stock and are considered to be beneficially owned by each of Andrey Semechkin and Ruslan Semechkin.

(5)	Pursuant to the applicable SEC rules, each of Dr. Andrey Semechkin and Dr. Ruslan Semechkin are considered to be the beneficial owner of shares held by the other.

(6)

The business address for AR Partners LLC is 5950 Priestly Drive, Carlsbad, CA 92008. AR Partners LLC is owned by Dr. Andrey Semechkin and Dr. Ruslan Semechkin. Dr. Ruslan Semechkin is the General Manager of AR Partners LLC. The shares held by AR Partners are all issuable upon conversion of outstanding shares of preferred stock and are considered to be beneficially owned by each of Andrey Semechkin and Ruslan Semechkin.

DESCRIPTION OF SECURITIES

General

Our certificate of incorporation authorizes us to issue 740,000,000 shares of capital stock, $0.001 par value per share, of which 720,000,000 shares are designated common stock and 20,000,000 shares are designated preferred stock. As of DecemberMay 31, 2014,2015, there were issued and outstanding 239,429,161272,769,607 shares of common stock, warrants of 127,508,118,117,891,242, for which we have reserved 127,508,118117,891,242 shares of common stock, 300,000 shares of Series B preferred stock, 43 shares of Series D preferred stock, 5,000,000 shares of Series G preferred stock, and 1,982917 shares of Series H preferred stock.

Common Stock

Voting Rights

Holders of our common stock are entitled to one vote per share. Subject to any voting rights granted to holders of any preferred stock, the affirmative vote of a majority of the shares present in person or by proxy and entitled to vote on the subject matter, other than the election of directors, will generally be required to approve matters voted on by our stockholders. Directors will be elected by plurality of the votes of the shares present in person or represented by a proxy at the meeting entitled to vote on the election of directors. Our certificate of incorporation does not provide for cumulative voting.

Dividends

Subject to the rights of holders of any outstanding preferred stock, the holders of outstanding shares of our common stock will share ratably on a per share basis in any dividends declared from time to time by our Board of Directors.

Other Rights

Subject to the rights of holders of any outstanding preferred stock, upon our liquidation, dissolution or winding up, we will distribute any assets legally available for distribution to our stockholders, ratably among the holders of our common stock outstanding at that time.

Preferred Stock

Our board of directors, without stockholder approval, but subject to the rights of our outstanding preferred stock, may issue preferred stock in one or more series from time to time and fix or alter the designations, relative rights, priorities, preferences, qualifications, limitations and restrictions of the shares of each series, to the extent that those are not fixed in our certificate of incorporation. The rights, preferences, limitations and restrictions of different series of preferred stock may differ with respect to dividend rates, amounts payable on liquidation, voting rights, conversion rights, redemption provisions, sinking fund provisions and other matters. Our board of directors may authorize the issuance of preferred stock that ranks senior to our common stock with respect to the payment of dividends and the distribution of assets on liquidation. In addition, our board of directors can fix the limitations and restrictions, if any, upon the payment of dividends on our common stock to be effective while any shares of preferred stock are outstanding. We have outstanding shares of Series B, Series D, Series G and Series H Preferred Stock.

Series B Preferred Stock

We have 300,000 shares of Series B preferred stock issued and outstanding. The Series B preferred stock is currently convertible into shares of common stock at the conversion ratio of 15.5 shares of common stock for each share of Series B preferred stock converted. The Series B preferred stock conversion rate is subject to anti-dilutionanti-

dilution protection (subject to the exceptions) in the event we issue shares of stock at a price below $0.0576$0.0448 per share, which is the resulting conversion price following the October 2014 financing transaction and subsequent price resetresets pursuant to registration effectiveness.

The Series B preferred stock has a priority (senior to the shares of common stock) on any sale or liquidation of the Company equal to the purchase price of the Series B preferred stock, plus a liquidation premium of 6% per year. If the Company elects to declare a dividend on common stock in any year, it must first pay to the Series B preferred stockholders a dividend equal to the amount of the dividend the Series B preferred stockholder would receive if the Series B preferred stock were converted just prior to the dividend declaration.

Each share of Series B preferred stock has the same voting rights as the number of shares of common stock into which it would be convertible on the record date.

Series D Preferred Stock

We have 43 shares of Series D preferred stock outstanding. These shares are held by (i) X-Master Inc., which is a related party and affiliated with our Chief Executive Officer and Co-Chairman of the Board of Directors Dr. Andrey Semechkin and Dr. Ruslan Semechkin, Chief Scientific Officer and a director and (ii) our Chief Executive Officer and Co-Chairman of the Board of Directors Dr. Andrey Semechkin.

The holders of Series D preferred stock are entitled to vote as a separate class to elect two members of our Board of Directors. The holders of Series D preferred stock must approve certain transactions and are entitled to vote with the common stock on other matters on an “as converted” basis. Historically, the Series D preferred stock earned cumulative dividends at a rate of 10% per annum through December 31, 2011 and 6% per annum effective January 1, 2012, payable 15 days after each quarter end.

On October 12, 2012, the Company and the holders of all of the outstanding shares of Series D and Series G preferred stock entered into a Waiver Agreement (the “Waiver Agreement”) pursuant to which such holders irrevocably waived their right to receive any and all accrued but unpaid dividends and interest thereon on or after September 30, 2012 on the Series D and Series G preferred stock. Under the Waiver Agreement, the holders of Series D preferred stock are restricted from transferring any shares of Series D preferred stock unless the transferee agrees to be bound by the Waiver Agreement.

The conversion rate of Series D preferred stock is protected by anti-dilution provisions in the event we issue shares of stock (or are deemed to issue shares of stock) at a price below $0.0576$0.0448 per share, which is the resulting conversion price following the October 2014 financing transaction and subsequent price resetresets pursuant to registration effectiveness.

Series G Preferred Stock

We have 5,000,000 shares of Series G preferred stock outstanding. These shares are held by AR Partners, LLC, an affiliate of Dr. Andrey Semechkin, the Company’s Co-Chairman and Chief Executive Officer, and Dr. Ruslan Semechkin, Chief Scientific Officer and a director.

The Series G preferred stock was initially convertible into shares of common stock at $0.40 per share, resulting in conversion ratio of 2.5 shares of common stock for every share of Series G preferred stock. The conversion price may be adjusted for stock splits and other combinations, dividends and distributions, recapitalizations and reclassifications, exchanges or substitutions and is subject to a weighted-average adjustment in the event of the issuance of additional shares of common stock below the conversion price. As a result of subsequent transactions, the current conversion price of the Series G preferred stock is $0.1866,$0.1979, and the conversion ratio is 5.35815.0518 shares of common stock for every share of Series G preferred stock.

The shares of Series G preferred stock have priority over the Series B preferred stock, and Common Stock on the proceeds from any sale or liquidation of the Company in an amount equal to the purchase price of the Series G preferred stock, but such payment may be made only after payment in full of the liquidation preferences payable to holders of any shares of Series D preferred stock then outstanding. Each share of Series G preferred stock has the same voting rights as the number of shares of Common Stock into which it would be convertible on the record date. As long as there are at least 1,000,000 shares of Series G preferred stock outstanding, the holders of Series G preferred stock have (i) the initial right to propose the nomination of two members of the Board, at least one of which nominees shall be subject to the approval of the Company’s independent directors, for election by the stockholder’s at the Company next annual meeting of stockholders, or, elected by the full board of directors to fill a vacancy, as the case may be, and (ii) the right to approve any amendment to the certificate of incorporation, certificates of designation or bylaws, in manner adverse to the Series G preferred stock, alter the percentage of board seats held by the Series G preferred stock directors or increase the authorized number of shares of Series G preferred stock. At least one of the two directors nominated by holders of the Series G preferred stock shares shall be independent based on the NASDAQ listing requirements. The holders of Series G preferred stock must approve certain matters and are entitled to vote with the Common Stock on an “as converted” basis on other matters.

From the date of issuance of the Series G preferred stock, cumulative dividends at the rate per annum of six percent (6%) of the purchase price per share accrued quarterly on such shares of Series G preferred stock. However, on October 12, 2012, the Company and the holders of all of the outstanding shares of Series D and Series G preferred stock entered into Waiver Agreement pursuant to which such holders irrevocably waived their right to receive any and all accrued but unpaid dividends and interest thereon on or after September 30, 2012 on the Series D and Series G preferred stock. Under the Waiver Agreement, the holders of Series G preferred stock are restricted from transferring any shares of Series G Preferred Stock unless the transferee agrees to be bound by the Waiver Agreement.

Series H-1 and H-2 Preferred Stock

At December 31, 2014 weWe have a total of 1,9821,395 shares of Series H-1 and H-2 preferred stock outstanding. These shares are held by outside investors and Dr. Andrey Semechkin, the Company’s Co-Chairman and Chief Executive Officer, and Dr. Ruslan Semechkin, Chief Scientific Officer and a director.

Subject to certain ownership limitations with respect to the Series H-1 Preferred Stock, the Preferred Stock is convertible at any time into shares of Common Stock at a current conversion price of $0.0576$0.0448 per share. The Preferred Stock is non-voting, is only entitled to dividends in the event that dividends are paid on the Common Stock, and will not have any preferences over the Common Stock, except that the Preferred Stock shall have preferential liquidation rights over the Common Stock. Other than the Series H-1 Preferred Stock having a beneficial ownership limitation, the Series H-1 Preferred Stock and Series H-2 Preferred Stock are substantially identical. The conversion price of the Preferred Stock is subject to certain resets as set forth in the Certificates of Designation, including the date of the amendment to the certificate of incorporation with respect to the reverse stock split, the effectiveness dates of the registration statements and the six and twelve month anniversaries of their issuance date.

Warrants issued in the Private Placement

In the Private Placement, we issued (i) Series A Warrants (the “Series A Warrants”) to purchase 38,777,726 shares of common stock with a term of five and 1/2 years, (ii) Series B Warrants (the “Series B Warrants”) to purchase 38,777,726 shares of common stock with a term of six months and (ii) Series C Warrants (the “Series C Warrants”, together with the Series A Warrants and the Series B Warrants, collectively, the “Investor Warrants”) to purchase 38,777,726 shares of common stock with a term of twelve months. The exercise price of the Warrants is subject to certain reset adjustments as set forth in the Warrant, including the date of the amendment

to the Company’s certificate of incorporation with respect to the reverse stock split, the effectiveness dates of the registration statements and the six and twelve month anniversaries of the date of issuance of the Warrants. As a result of previous adjustments, the exercise price of the Warrants is currently $0.0576$0.0448 per share. On June 20, 2015, 31,022,181 Series B warrants expired unexercised.

The Warrants issued to Sabby Volatility Warrant Master Fund Ltd. and Sabby Healthcare Volatility Master Fund, Ltd. contain exercise and conversion limitations providing that a holder thereof may not convert or exercise (as the case may be) to the extent that, if after giving effect to such conversion or exercise (as the case may be), the holder or any of its affiliates would beneficially own in excess of 4.99% of the outstanding shares of common stock immediately after giving effect to such conversion or exercise (as the case may be). However, the 4.99% limitation would not prevent such selling stockholder from acquiring and selling in excess of 4.99% of our common stock through a series of acquisitions and sales while never beneficially owning more than 9.99% in aggregate.

Registration Rights in the Private Placement

In connection with the Private Placement, we also entered into a registration rights agreement with the investors pursuant to which, as amended, we are obligated to file a registration statement to register the resale of (i) 200% of the shares of Common Stock issuable upon conversion of the Preferred Stock, and (ii) 100% of the shares of common stock issuable upon exercise of the warrants. In addition to the registration rights, the Purchasers are entitled to receive liquidated damages upon the occurrence of a number of events relating to filing, getting effective and maintaining an effective registration statement covering the shares underlying the Series H Preferred Stock and the Warrants, subject to certain exceptions.

Transfer Agent

The transfer agent for our common stock is Securities Transfer Corporation. The transfer agent address is 2591 Dallas Parkway, Suite 102, Frisco, TX 75034.

PLANDESCRIPTION OF DISTRIBUTIONWARRANTS

Each Selling Stockholder (the “Selling Stockholders”)The material terms and provisions of the securitieswarrants being issued in this offering are summarized below. The following description is subject to, and qualified in its entirety by, the form of warrant, which has been filed as an exhibit to the registration statement of which this prospectus is a part. Prospective investors should carefully review the terms and provisions set forth in the form of warrant.

Form. The warrants will be issued as individual warrants to each of the investors.

Exercisability. The warrants are exercisable at any time after the date of their pledgees, assigneesissuance, and successors-in-interest may,at any time up to the date that is             years from the date of issuance, at which time any unexercised warrants will expire and cease to time, sell any or allbe exercisable. The warrants will be exercisable, at the option of their securities covered hereby on the principal trading market or any other stock exchange, market or trading facility on which the securities are tradedeach holder, in whole or in private transactions. These sales may be at fixed or negotiated prices. A Selling Stockholder may use any one or morepart by delivering to us a duly executed exercise notice and by payment in full in immediately available funds for the number of shares of common stock purchased upon such exercise. If a registration statement registering the issuance of the following methods when selling securities:

The Selling Stockholders may also sell securities under Rule 144warrants under the Securities Act of 1933, as amended, (the “Securities Act”), ifis not then effective or available, rather than under this prospectus.

Broker-dealers engaged by the Selling Stockholdersholder may arrange for other brokers-dealersexercise the warrant through a cashless exercise, in whole or in part, in which case the holder would receive upon such exercise the net number of shares of common stock determined according to participate in sales. Broker-dealers may receive commissions or discounts from the Selling Stockholders (or, if any broker-dealer acts as agent for the purchaser of securities, from the purchaser) in amounts to be negotiated, but, except asformula set forth in the warrant. No fractional shares of common stock will be issued in connection with the exercise of a supplementwarrant. In lieu of fractional shares, we will either pay the holder an amount in cash equal to this Prospectus,the fractional amount multiplied by the exercise price or round up to the next whole share.

Exercise Limitation. A holder will not have the right to exercise any portion of the warrant if the holder (together with its affiliates) would beneficially own in excess of 4.99% of the casenumber of an agency transactionshares of our stock outstanding immediately after giving effect to the exercise, as such percentage ownership is determined in accordance with the terms of the warrants. However, any holder may increase or decrease such percentage to any other percentage not in excess of 9.99%, provided that any increase in such percentage shall not be effective until 61 days after such notice to us.

Exercise Price; Anti-Dilution. The initial exercise price per share of common stock is $             per share of common stock. The exercise price is subject to appropriate adjustment in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting our common stock.

Transferability. Subject to applicable laws, the warrants may be offered for sale, sold, transferred or assigned without our consent. There is currently no trading market for the warrants and a customary brokerage commissiontrading market is not expected to develop.

Exchange Listing. We do not plan to apply to have the warrants quoted on the OTCQB, or any other nationally recognized trading system.

Fundamental Transactions. In the event of a fundamental transaction, as described in the warrants and generally including any reorganization, recapitalization or reclassification of our common stock, the sale, transfer or other disposition of all or substantially all of our properties or assets, our consolidation or merger with or into another person, the holders of the warrants will be entitled to receive upon exercise of the warrants the kind and amount of securities, cash or other property that the holders would have received had they exercised the warrants immediately prior to such fundamental transaction.

Rights as a Stockholder. Except as otherwise provided in the warrants or by virtue of such holder’s ownership of shares of our common stock, the holder of a warrant does not have the rights or privileges of a holder of our common stock, including any voting rights, until the holder exercises the warrant.

PLAN OF DISTRIBUTION

We are offering up to                 shares of our common stock and warrants to purchase up to                 shares of our common stock in this offering. Each share of common stock will be accompanied by a warrant to purchase up to                 shares of common stock. The common stock and warrants are immediately separable and will be issued separately. However, there is no minimum offering amount required as a condition to closing and we may sell significantly fewer shares of common stock and warrants in the offering. The offering will terminate on                     , 2015, unless the offering is fully subscribed before that date or we decide to terminate the offering prior to that date. Dr. Andrey Semechkin, our Co-Chairman and CEO, will purchase shares and warrants on the same terms as other investors by surrendering a promissory note issued by us in the principal amount of $2,262,000.

In determining the offering price of the common stock and the exercise price of the warrants, we will consider a number of factors including, but not limited to, the current market price of our common stock, trading prices of our common stock over time, the illiquidity and volatility of our common stock, our current financial condition and the prospects for our future cash flows and earnings, and market and economic conditions at the time of the offering. Once the offering price is determined, the offering price for the common stock and the exercise price of the warrants will remain fixed for the duration of the offering.

H.C. Wainwright & Co., LLC (“Wainwright” or the “Placement Agent”) has agreed to act as our exclusive placement agent in connection with the offering pursuant to the terms and conditions of an engagement agreement. The Placement Agent is not purchasing or selling any securities offered by this prospectus, and is not required to arrange for the purchaser or sale of any specific number or dollar amount of securities, but will use its reasonable best efforts to arrange for the sale of the securities offered by this prospectus. We will enter into securities purchase agreements directly with the institutional investors which will purchase securities in this offering. The Placement Agent may retain one or more sub-agents or selected dealers in connection with the offering.

We have agreed to pay to the Placement Agent a placement agent fee equal to ten percent (10 %) of the aggregate gross proceeds to us from the sale of the securities in the offering (including any proceeds from the exercise of the warrants issued in the offering which are exercised more than one year after closing of the offering, but excluding gross proceeds from any sales of securities to our employees or affiliates of the Semechkin family). In addition, we have agreed to reimburse the Placement Agent with a non-accountable expense allowance equal to one percent (1%) of gross offering proceeds (excluding gross proceeds from any sales of securities to our employees or affiliates of the Semechkin family), subject to a minimum of $50,000 to reimburse the placement agent for its counsel fees, subject to a refund to us in compliance with FINRA Rule 2440;5110(f)(2)(D)(i) if the offering does not close. We estimate total expenses of this offering, excluding the placement agent fees, will be approximately $            . The following table shows the per share and intotal fees we will pay to the case of a principal transaction a markup or markdown in compliance with FINRA IM-2440.

In connection withplacement agent assuming the sale of the securities or interests therein, the Selling Stockholders may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short salesall of the shares offered pursuant to this prospectus.

In addition, we have agreed to issue warrants to the Placement Agent (the “Placement Agent Warrants”) to purchase up to a number of shares of common stock equal to ten percent (10 %) of the aggregate number of shares of common stock sold in this offering (excluding any shares of common stock issuable upon exercise of the warrants and excluding securities insold to our employees or to affiliates of the course of hedgingSemechkin family). The Placement Agent Warrants shall have the positions they assume. The Selling Stockholders may also sell securities short and deliver these securities to close out their short positions, or loan or pledgesame terms as the securities to broker-dealers that in turn may sell these securities. The Selling Stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of securitieswarrants offered by this prospectus, which securities such broker-dealerexcept that the exercise price shall be 100 % of the public offering price per unit, or other financial institution may resell pursuant toan exercise price of $             per share, and the expiration date shall be             years from the effective date of the registration statement of which this prospectus (as supplementedforms a part. Pursuant to FINRA Rule 5110(f)(2)(G)(vi), the Placement Agent Warrants will not have anti-dilution protection. Pursuant to FINRA Rule 5110(g)(1), neither the Placement Agent Warrants nor any

shares of common stock issued upon exercise of the Placement Agent Warrants may be sold, transferred, assigned, pledged, or amendedhypothecated, or be subject to reflectany hedging, short sale, derivative, put, or call transaction that would result in the effective economic disposition of such transaction).securities by any person for a period of 180 days immediately following the date of effectiveness or commencement of sales of this offering, except the transfer of any security (i) by operation of law or by reason of reorganization, (ii) to any FINRA member firm participating in the offering and the officers and partners thereof, if all securities so transferred remain subject to the lock-up restriction described above for the remainder of the time period, (iii) if the aggregate amount of our securities held by the holder of the Placement Agent Warrants or related person does not exceed 1% of the securities being offered, (iv) that is beneficially owned on a pro-rata basis by all equity owners of an investment fund, provided that no participating member manages or otherwise directs investments by the fund, and participating members in the aggregate do not own more than 10% of the equity in the fund, or (v) the exercise or conversion of any security, if all securities received remain subject to the lock-up restriction set forth above for the remainder of the time period. The Placement Agent Warrants and the shares underlying the Placement Agent Warrants are registered under the registration statement of which this prospectus forms a part. Because there is no minimum offering amount required as a condition to closing, the actual total proceeds received by us and total offering commissions and warrants issuable to the Placement Agent, if any, are not presently determinable and may be substantially less than the maximum amount set forth above.

We have also agreed to pay Wainwright a tail fee equal to the cash and warrant compensation set forth above if, at any time within twelve (12) months of the termination of our engagement, we receive financing form any investor introduced to us by the placement agent.

The Selling Stockholders and any broker-dealers or agentsengagement agreement provides that are involved in sellingwe will indemnify the securitiesPlacement Agent against specified liabilities, including liabilities under the Securities Act of 1933, as amended. The Placement Agent may be deemed to be “underwriters”an underwriter within the meaning of Section 2(a)(11) of the Securities Act, in connection with such sales. In such event,and any commissions received by such broker-dealers or agentsit and any profit realized on the resale of the securities purchasedsold by them mayit while acting as principal might be deemed to be underwriting commissionsdiscounts or discountscommissions under the Securities Act. Each Selling Stockholder has informedAs an underwriter, the Company that it does not have any written or oral agreement or understanding, directly or indirectly, with any person to distribute the securities.

The Company isPlacement Agent would be required to pay certain fees and expenses incurred by the Company incident to the registration of the securities. The Company has agreed to indemnify the Selling Stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act.

Because Selling Stockholders may be deemed to be “underwriters” within the meaning ofcomply with the Securities Act they will be subject to the prospectus delivery requirements ofand the Securities Exchange Act of 1934, as amended (“Exchange Act”), including without limitation, Rule 172 thereunder. In addition, any securities covered by this prospectus which qualify for sale pursuant to Rule 144 under the Securities Act may be sold under Rule 144 rather than under this prospectus. The Selling Stockholders have advised us that there is no underwriter or coordinating broker acting in connection with the proposed sale of the resale securities by the Selling Stockholders.

We agreed to keep this prospectus effective until the earlier of (i) the date on which the securities may be resold by the Selling Stockholders without registration10b-5 and without regard to any volume or manner-of-sale limitations by reason of Rule 144, without the requirement for the Company to be in compliance with the current public information under Rule 144 under the Securities Act or any other rule of similar effect or (ii) all of the securities have been sold pursuant to this prospectus or Rule 144 under the Securities Act or any other rule of similar effect. The resale securities will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale securities covered hereby may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

Under applicable rules and regulationsRegulation M under the Exchange Act, any person engaged in the distribution of the resale securities may not simultaneously engage in market making activities with respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the Selling Stockholders will be subject to applicable provisions of the Exchange Act and theAct. These rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of theshares of common stock and warrants by the Selling StockholdersPlacement Agent acting as principal. Under these rules and regulations, the Placement Agent:

LEGAL MATTERS

The validity of the issuance of securities offered by this prospectus has beenwill be passed upon for us by DLA Piper LLP (US), San Diego, California. Ellenoff Grossman & Schole LLP, New York, New York, is acting as counsel to the placement agent.

EXPERTS

The consolidated balance sheets of International Stem Cell Corporation and Subsidiaries as of December 31, 20132014 and 2012,2013, and the related consolidated statements of operations, changes in redeemable convertible preferred stock and stockholders’ equity (deficit) and cash flows for the years then ended have been incorporated herein and in the registration statement in reliance upon the report of Mayer Hoffman McCann P.C., independent registered public accounting firm, and given upon the authority of said firm as expert in accounting and auditing.

WHERE YOU CAN FIND MORE INFORMATION

We file reports, proxy statements and other information with the SEC. Copies of our reports, proxy statements and other information may be inspected and copied at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Copies of these materials can also be obtained by mail at prescribed rates from the Public Reference Room of the SEC, 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC maintains an internet site that contains reports, proxy and information statements and other information regarding International Stem Cell Corporation and other issuers that file electronically with the SEC. The address of the SEC internet site is www.sec.gov.www.sec.gov. In addition, we make available on or through our Internet site copies of these reports as soon as reasonably practicable after we electronically file or furnish them to the SEC. Our Internet site can be found at www.internationalstemcell.com.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Consolidated Financial Statements

International Stem Cell Corporation and Subsidiaries

International Stem Cell Corporation and Subsidiaries

Condensed Consolidated Balance Sheets

(in thousands, except share data)

See accompanying notes to the unaudited condensed consolidated financial statements.

International Stem Cell Corporation and Subsidiaries

Condensed Consolidated Statements of Operations

(in thousands, except per share data)

(Unaudited)