The risks enumerated below are not the only risks we face. The risk factors are not intended to be an all-inclusive discussion of all of the potential risks relating to CytoDyn. Any of the risk factors described below could significantly and adversely affect our business, prospects, financial condition and results of operations. Additional risks and uncertainties not currently known or that are currently considered to be immaterial may also materially and adversely affect our business.

We are a development-stage company and have a history of significant operating losses; we expect to continue to incur operating losses, and we may never achieve or maintain profitability.

We have not generated any revenue from product sales or licensing to date. Since our inception, we have incurred operating losses in each year due to costs incurred in connection with our collaborative research and development activities and general and administrative expenses associated with our operations. Our drug candidates are in the early stages of testing, and we or our current and future partners must conduct significant additional clinical trials before we can seek the regulatory approvals necessary to begin commercial sales of our products. We expect to incur losses for at least several more years as we continue development of, and seek regulatory approvals for, our drug candidates and commercialize any approved products. If our drug candidates fail or do not gain regulatory approval, or if our products do not achieve market acceptance, we will not be profitable, nor be able to explore other opportunities to enhance shareholder value. If we fail to become and remain profitable, or if we are unable to fund our continuing losses, our shareholders could lose all or part of their investments.

We will need substantial additional funding, which may not be available or, if it is available, such financing may substantially dilute our existing shareholders.

The discovery, development, and commercialization of new treatments, such as our PRO 140 product candidate, is costly. As a result, to the extent continued review of our product candidate by us or our partners is promising and we elect to fund the development or commercialization of a product, we will need to raise additional capital, or enter into strategic partnerships, to enable us to:

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Until we can generate a sufficient amount of product revenue to finance our cash requirements, which we may never achieve, we expect to finance our cash needs primarily through public or private equity offerings, debt financings or through strategic alliances. We cannot be certain that additional funding will be available on acceptable terms or at all. If we are not able to secure additional funding when needed, we may have to delay, reduce the scope of or eliminate one or more of our clinical trials, collaborative development programs or future commercialization initiatives. In addition, any additional funding that we do obtain will dilute the ownership held by our existing security holders. The amount of this dilution may be substantially increased if the trading price of our common stock is lower at the time of any financing then it is now or was at the time shares were acquired. Any debt financing could involve substantial restrictions on activities and creditors could seek a pledge of some or all of our assets. We have not identified the sources for the additional financing that we will require, and we do not have commitments from any third parties to provide this future financing. If we fail to obtain additional funding as needed, we may be forced to cease or scale back operations, and our results, financial condition and stock price would be adversely affected.

The amount of financing we require will depend on a number of factors, many of which are beyond our control. Our results of operations, financial condition and stock price are likely to be adversely affected if our funding requirements increase or are otherwise greater than we expect.

Our future funding requirements will depend on many factors, including, but not limited to:

If any of these factors cause our funding needs to be greater than expected, our operations, financial condition, ability to continue operations and stock price may be adversely affected.

Our future cash requirements may differ significantly from our current estimates.

We recognize that we will need to raise a significant amount of capital now and in the future in order to pursue our business plans. Our cash requirements may differ significantly from our estimates from time to time, depending on a number of factors, including:

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If we cannot raise the funds we need to pursue our business strategies and operate our business, we will need to scale back our business plans or may even be forced to discontinue our operations. Our business, financial condition, and stock price would be negatively affected by any of these outcomes.

We have significant debt as a result of prior financings, all of which is scheduled to mature at various dates over the next three years. Our substantial indebtedness could adversely affect our business, financial condition and results of operations.

Our level of debt, which includes convertible promissory notes totaling $7.2 million and other promissory notes in the amount of $0.5 million at July 31, 2013, could have significant consequences on our future operations, including, among others:

Any of the above-listed factors could have a material adverse effect on our business, financial condition, results of operations, and ability to continue as a going concern.

Our ability to make interest and principal payments on our outstanding promissory notes will depend entirely on our ability to raise sufficient funds to satisfy our debt service obligations and our noteholders’ willingness to convert their notes to common shares, which will likely depend on our stock price from time to time. If noteholders do not elect to convert, it is likely that we will need to borrow or raise additional funds to make required principal and interest payments, as such payment become due and payable, or undertake alternative financing plans, such as refinancing or restructuring our debt, selling additional shares of capital stock, selling assets or reducing or delaying investments in our business. Additional funds or alternative financing may not be available to us. Any inability to obtain additional funds or alternative financing on acceptable terms would likely cause us to be unable to meet our payment obligations, which could have a material adverse effect on our business, financial condition and results of operations and our ability to continue to operate.

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The Progenics Agreement and related license agreements assumed in the PRO 140 acquisition require us to make significant milestone, royalty, and other payments, which will require additional financing and, in the event we do commercialize our PRO 140 product, decrease the revenues we may ultimately receive on sales.

Under the Progenics Agreement, we must pay to Progenics and third party licensors significant milestone payments and royalties as described in Item 1 above. For more information, please see the Progenics Agreement, which is attached as an exhibit to the Company’s Current Report on Form 8-K filed with the SEC on July 30, 2012, and PDL License, which is filed as an exhibit to this report. In order to make the various milestone payments that are required, we will need to raise additional funds. In addition, our royalty obligations will reduce the economic benefits to us of future sales if we do receive regulatory approval and seek to commercialize PRO 140.

Our proposed clinical trials of PRO 140 depend on funding from the NIH grants awarded to Drexel and its principal investigator, Dr. Jacobson.

Prior to our acquisition of PRO 140, Progenics and Drexel and its principal investigator, Dr. Jacobson, were awarded various grants from the NIH to fund clinical trials of PRO 140, including two grants that remain open. In order to benefit from this continued funding, we are dependent on Dr. Jacobson’s cooperation in structuring the protocols for the NIH-funded clinical trials in a manner that facilitates efforts to maintain PRO 140’s “fast track” drug candidate designation by the FDA and obtain regulatory approval of commercially viable uses of PRO 140 in HIV-infected patients. We believe these clinical trials will constitute a Phase IIb study of PRO 140, but there can be no assurance that will be the case. If study protocols are not designed in a manner that provides commercial and regulatory benefits for us or if NIH funding is not awarded, withdrawn, or proves insufficient, we will need significant additional financing to self-fund our trials, and our expected costs and time to completion would increase significantly.

Clinical trials are expensive, time-consuming and subject to delay.

Clinical trials are subject to rigorous regulatory requirements and are expensive and time-consuming to design and implement. The length of time and number of trial sites and patients required for clinical trials vary substantially based on the type, complexity, novelty, intended use and any safety concerns relating to a drug candidate. We estimate that the clinical trials of our current drug candidate and any other drug candidates we decide to pursue will require several years to complete. Specifically, we estimate that it will take at least three years to complete the necessary clinical trials, obtain regulatory approval from the FDA or other non-U.S. regulatory agency, and begin to commercialize PRO 140. Clinical trials for our other drug candidates, including Cytolin, may take significantly longer to complete, if they are pursued at all.

The commencement and completion of our clinical trials could be delayed or prevented by many factors, including, but not limited to:

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Testing of our primary product candidate, PRO 140, is in early stages and our clinical trial results may not ultimately confirm initial positive indications, which would materially and adversely affect our business, financial condition and stock price.

Our efforts to commercialize PRO 140 are dependent on obtaining FDA or other non-U.S. regulatory agency approval of its use in HIV-infected patients. Although early test results are positive, the process of obtaining approval of a drug product for use in humans is extremely lengthy and time-consuming, and numerous factors may prevent our successful development of PRO 140, including negative results in future clinical trials, the development of other products with equal or better results by competitors, or inability to obtain sufficient additional funding to continue to pursue development. In addition, although PRO 140 has not demonstrated significant immunogenic response in trials conducted to date, these trials have been quite short (up to three weeks) and further trials are needed to determine whether the length of time until development of immunogenic response in humans is long enough for PRO 140 to be a viable treatment regimen. Failure to successfully develop PRO 140 would have a material and adverse effect on our business, financial condition and stock price, and would threaten our ability to continue to operate our business, particularly since PRO 140 is the only product candidate we are actively pursuing at this time.

Although PRO 140 has been designated as a candidate for fast track approval by the FDA, our ability to obtain accelerated approval may be lost.

The FDA designated PRO 140 as a candidate for fast track consideration in 2006. The letter ascribing this designation stated that, if the clinical development program pursued for PRO 140 did not continue to meet the criteria for fast track designation, the Investigational New Drug (“IND”) application would not be reviewed under the fast track program. There is no assurance that the FDA will ultimately consider PRO 140 for approval on an accelerated basis. Any failure to maintain eligibility for fast track review will likely result in requirements for longer or additional clinical trials and a slower approval process, resulting in additional costs and further delay in the potential realization of revenues from commercialization of PRO 140.

Any failure to attract and retain skilled directors, executives, employees and consultants could impair our drug development and commercialization activities.

Our business depends on the skills, performance, and dedication of our directors, executive officers and key scientific and technical advisors. Currently, we have only two employees, our President and Chief Executive Officer and our Chief Financial Officer. All of our current scientific advisors are independent contractors and are either self-employed or employed by other organizations. As a result, they may have conflicts of interest or other commitments, such as consulting or advisory contracts with other organizations, which may affect their ability to provide services to us in a timely manner. We may need to recruit additional directors, executive management employees, and advisers, particularly scientific and technical personnel, which will require additional financial resources. In addition, there is currently intense competition for skilled directors, executives and employees with relevant scientific and technical expertise, and this competition is likely to continue. If we are unable to attract and retain persons with sufficient scientific, technical and managerial experience, we may be forced to limit or delay our product development activities or may experience difficulties in successfully conducting our business, which would adversely affect our operations and financial condition.

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We do not have a chief medical officer, internal research and development operations, or a sales and marketing staff, which will increase our dependence on consulting relationships and strategic alliances with industry partners.

We currently have no chief medical officer, research and development staff or coordinators, or internal sales, marketing or distribution capabilities. We rely and intend to continue to rely on third parties for many of these functions. As a result, we will be dependent on consultants and strategic partners in our development and commercialization activities, and it may be administratively challenging to monitor and coordinate these relationships. If we are unable to successfully manage our relationships with third parties, we may not be able to successfully manage development and approval of our PRO 140 drug candidate or other products or commercialize any products that are approved.

We may not be able to identify, negotiate and maintain the strategic alliances necessary to develop and commercialize our products and technologies, and we will be dependent on our corporate partners if we do.

We may seek to enter into a strategic alliance with a pharmaceutical company for the further development and approval of one or more of our product candidates. Strategic alliances potentially provide us with additional funds, expertise, access, and other resources in exchange for exclusive or non-exclusive licenses or other rights to the technologies and products that we are currently developing or may explore in the future. We cannot give any assurance that we will be able to enter into additional strategic relationships with a pharmaceutical company or others in the near future or at all, or maintain our current relationships. In addition, we cannot assure you that any agreements we do reach will achieve our goals or be on terms that prove to be economically beneficial to us. When we do enter into strategic or contractual relationships, we become dependent on the successful performance of our partners or counter-parties. If they fail to perform as expected, such failure could adversely affect our financial condition, lead to increases in our capital needs, or hinder or delay our development efforts.

We will need to outsource and rely on third parties for the clinical development and manufacture, sales and marketing of product candidates, and our future success will be dependent on the timeliness and effectiveness of the efforts of these third parties.

We are dependent on third parties, such as Drexel, for important aspects of our product development strategy. We do not have the required financial and human resources to carry out independently the pre-clinical and clinical development for our product candidate, and do not have the capability or resources to manufacture, market or sell our current product candidates. As a result, we contract with and rely on third parties for important functions, including testing, storing, and manufacturing our products and managing and conducting clinical trials from which we may obtain a benefit. We have recently entered into several agreements with third parties for such services. In addition, we are dependent on clinical trials to be conducted by Dr. Jacobson at Drexel for completion of Phase IIb clinical trials that may enable us to proceed further in the regulatory approval process. If problems develop in our relationships with third parties, or if such parties fail to perform as expected, it could lead to delays or lack of progress, significant cost increases, changes in our strategies, and even failure of our product initiatives.

Clinical trials may fail to demonstrate the desired safety and efficacy of our drug candidates, which could prevent or significantly delay completion of clinical development and regulatory approval.

Prior to receiving approval to commercialize PRO 140 or any other drug candidates, we must adequately demonstrate to the FDA and any foreign regulatory authorities in jurisdiction in which we seek approval that it or any other product candidate is sufficiently safe and effective with substantial evidence from well-controlled clinical trials. In clinical trials, we will need to demonstrate efficacy for the treatment of specific indications and monitor safety throughout the clinical development process and following approval. If clinical work by us or others leads to undesirable adverse effects in patients, it could delay or prevent the filing of an Investigational New Drug application with respect to our potential drug candidates or cause us to cease clinical trials with respect to any drug candidate. If our current or future preclinical studies or clinical trials are unsuccessful, our business will be significantly harmed and our stock price would be negatively affected.

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Our drug candidates are subject to the risks of failure inherent in drug-related product development. Preclinical studies may not yield results that adequately support an IND application. Even if these applications are filed with respect to our drug candidates, the results of preclinical studies do not necessarily predict the results of clinical trials. In addition, even if we believe the data collected from clinical trials of our drug candidates are promising, these data may not be sufficient to support approval by the FDA or foreign regulatory authorities. If regulatory authorities do not approve our products or if we fail to maintain regulatory compliance, we would be unable to commercialize our products, and our business, results of operations and financial condition would be harmed.

Even if we obtain regulatory approvals, our products will be subject to ongoing regulatory review.

Following any initial regulatory approval of any products we may develop, we will also be subject to continuing regulatory review, including the review of adverse drug experiences and clinical results that are reported after our products are made commercially available. This would include results from any post-marketing tests or vigilance required as a condition of approval. The manufacturer and manufacturing facilities we use to make any of our products will also be subject to periodic review and inspection by the FDA. The discovery of any previously unknown problems with the product, manufacturer or facility may result in restrictions on the product or manufacturer or facility, including withdrawal of the product from the market. Reliance on third-party manufacturers entails risks, including the continuation of a contractual or other relationship with the third-party manufacturer, and reliance on the third-party manufacturer for regulatory compliance. Our product promotion and advertising also will be subject to regulatory requirements and continuing FDA review.

Our competitors may develop drugs that are more effective, safer and less expensive than ours, which may diminish or eliminate the commercial success of any drug candidates that we may commercialize.

We are engaged in the HIV treatment sector of the biopharmaceutical industry, which is intensely competitive and changes rapidly. We expect that new developments by other companies and academic institutions in the areas of HIV treatment will continue. If approved for marketing by the FDA, depending on the approved clinical indication, our drug candidates may be competing with existing and future antiviral treatments for HIV.

Our competitors may:

We will compete against large pharmaceutical and biotechnology companies and smaller companies that are collaborating with larger pharmaceutical companies, new companies, academic institutions, government agencies and other public and private research organizations. These competitors in nearly all cases operate research and development programs and have substantially greater financial resources than we do. Our competitors also have significantly greater experience in:

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If our competitors market drugs that are less expensive, safer or more efficacious than our potential drugs, or that reach the market sooner or gain or maintain greater market acceptance, we may not achieve commercial success. In addition, if we fail to achieve technical superiority over other treatments, we may be unable to compete effectively.

We expect to rely on third party manufacturers and will be dependent on their quality and effectiveness.

Our primary drug candidate and potential drug candidates require precise, high-quality manufacturing. The failure to achieve and maintain high manufacturing standards, including failure to detect or control anticipated or unanticipated manufacturing errors or the frequent occurrence of such errors, could result in patient injury or death, discontinuance or delay of ongoing or planned clinical trials, delays or failures in product testing or delivery, cost overruns, product recalls or withdrawals and other problems that could seriously hurt our business. Contract drug manufacturers often encounter difficulties involving production yields, quality control and quality assurance and shortages of qualified personnel. These manufacturers are subject to stringent regulatory requirements, including the FDA’s current good-manufacturing-practices regulations and similar foreign laws and standards.

If one of our contract manufacturers fails to maintain ongoing compliance at any time, the production of our drug candidates could be interrupted, resulting in delays or discontinuance of our clinical trials, additional costs and loss of potential revenues. In addition, failure of any third-party manufacturers, or us, to comply with applicable regulations could result in sanctions. These sanctions could include fines, injunctions, civil penalties, failure of regulatory authorities to grant marketing approval of our products, delay, suspension or withdrawal of approvals, license revocation, product seizures or recalls, operational restrictions and criminal prosecutions, any of which could significantly and adversely affect our business.

We may not be able to successfully scale-up manufacturing of our drug candidates in sufficient quality and quantity, which would delay or prevent us from developing our drug candidates and commercializing resulting approved drugs, if any.

To date, our drug candidates have been manufactured in small quantities for preclinical studies and early-stage clinical trials. In order to conduct larger-scale or late-stage clinical trials for a drug candidate and for commercialization of the resulting product, if that drug candidate is approved for sale, we will need to manufacture it in larger quantities. We may not be able to successfully increase the manufacturing capacity for any of our drug candidates, whether in collaboration with third-party manufacturers or on our own, in a timely or cost-effective manner or at all. In addition, quality issues may arise during those scale-up activities. If we are unable to successfully scale up the manufacture of any of our drug candidates in sufficient quality and quantity, the development and testing of that drug candidate and regulatory approval or commercial launch of any resulting drugs may be delayed, which could significantly harm our business.

There is uncertainty relating to our drug candidate Cytolin, and our business may be adversely affected if it later proves not to have the novel and beneficial characteristics we currently believe it to possess.

Until late 2012, the primary focus of our business was on the development of Cytolin, a monoclonal antibody that has, what we believe, are novel mechanisms of action directed against the replication of HIV. We do not understand all of the biomechanical mechanisms of Cytolin at this time and we are not actively pursuing its development and review at this time. If we cannot determine how Cytolin acts to reduce the viral load of HIV infection, we may not seek or be able to obtain regulatory approval of its use in human patients.

We may be subject to potential product liability and other claims that could materially impact our business and financial condition.

The development and sale of medical products exposes us to the risk of significant damages from product liability and other claims. The use of our drug candidates in clinical trials may result in adverse effects. We cannot predict all the possible harms or adverse effects that may result. We do not maintain product liability insurance, but plan to obtain product liability insurance prior to the commencement of further clinical trials of PRO 140. We may

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not have sufficient resources to pay for any liabilities resulting from a personal injury or other claim, even if we do later become insured. In addition to the possibility of direct claims, we may be required to indemnify third parties against damages and other liabilities arising out of our development, commercialization and other business activities, which would increase our liability exposure. If third parties that have agreed to indemnify us fail to do so, we may be held responsible for those damages and other liabilities as well.

Legislative, regulatory, or medical cost reimbursement changes may adversely impact our business.

New laws, regulations and judicial decisions, or new interpretations of existing laws, regulations and decisions, that relate to the health care system in the U.S. and in other jurisdictions may change the nature of and regulatory requirements relating to drug discovery, clinical testing and regulatory approvals, limit or eliminate payments for medical procedures and treatments, or subject the pricing of pharmaceuticals to government control. Outside the U.S., and particularly in the European Union, the pricing of prescription pharmaceuticals is subject to governmental control. In addition, third-party payers in the U.S. are increasingly attempting to contain health care costs by limiting both coverage and the level of reimbursement of new drug products. Consequently, significant uncertainty exists as to the reimbursement status of newly approved health care products. Significant changes in the health care system in the U.S. or elsewhere, including changes resulting from adverse trends in third-party reimbursement programs, could have a material adverse effect on our projected future operating results and our ability to raise capital, commercialize products, and remain in business.

If we are unable to effectively implement or maintain a system of internal control over financial reporting, we may not be able to accurately or timely report our financial results and our stock price could be adversely affected.

Section 404 of the Sarbanes-Oxley Act of 2002 and related regulations require us to evaluate the effectiveness of our internal control over financial reporting as of the end of each fiscal year, and to include a management report assessing the effectiveness of our internal control over financial reporting in our Annual Report on Form 10-K for that fiscal year. Management determined that as of both May 31, 2012, and May 31, 2013, our disclosure controls and procedures and internal control over financial reporting were not effective due to material weaknesses in our internal control over financial reporting related to inadequate segregation of duties over authorization, review and recording of transactions as well as the financial reporting of such transactions. Any failure to implement new or improved controls necessary to remedy the material weaknesses described above, or difficulties encountered in the implementation or operation of these controls, could harm our operations, decrease the reliability of our financial reporting, and cause us to fail to meet our financial reporting obligations, which could adversely affect our business and reduce our stock price.

Our success depends substantially upon our ability to obtain and maintain intellectual property protection relating to our drug candidates and research technologies.

Due to evolving legal standards relating to the patentability, validity and enforceability of patents covering pharmaceutical inventions and the claim scope of patents, our ability to enforce our existing patents and to obtain and enforce patents that may issue from any pending or future patent applications is uncertain and involves complex legal, scientific and factual questions. To date, no consistent policy has emerged regarding the breadth of claims allowed in biotechnology and pharmaceutical patents. Thus, we cannot be sure that any patents will issue from any pending or future patent applications owned by or licensed to us. Even if patents do issue, we cannot be sure that the claims of these patents will be held valid or enforceable by a court of law, will provide us with any significant protection against competing products, or will afford us a commercial advantage over competitive products. If one or more products resulting from our drug candidates is approved for sale by the FDA and we do not have adequate intellectual property protection for those products, competitors could duplicate them for approval and sale in the U.S. without repeating the extensive testing required of us or our partners to obtain FDA approval.

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Known third party patent rights could delay or otherwise adversely affect our planned development and sale of PRO 140. We have identified but not exhaustively analyzed other patents that could relate to our proposed products.

We are aware of patent rights held by a third party that may cover certain compositions within our PRO 140 drug candidate. The patent holder has the right to prevent others from making, using, or selling a drug that incorporates the patented compositions, while the patent remains in force. We believe that the third party’s patent rights will not affect our planned development, regulatory clearance, and eventual marketing, commercial production, and sale of PRO 140. The relevant patent expires before we expect to commercially introduce that drug candidate. In addition, the Hatch-Waxman exemption to U.S. patent law permits all uses of compounds in clinical trials and for other purposes reasonably related to obtaining FDA clearance of drugs that will be sold only after patent expiration, so our use of PRO 140 in those FDA-related activities does not infringe the patent holder’s rights. However, were the patent holder to assert its rights against us before expiration of the patent for activities unrelated to FDA clearance, the development and ultimate sale of a PRO 140 product could be significantly delayed, and we could incur the expense of defending a patent infringement suit and potential liability for damages for periods prior to the patent’s expiration.

In connection with our acquisition of rights to PRO 140, our patent counsel conducted a freedom-to-operate search that identified other patents that could relate to our proposed PRO 140 drug candidate. Sufficient research and analysis was conducted to enable us to reach the conclusion that PRO 140 likely does not infringe those patent rights. However, we did not have an exhaustive analysis conducted as to the identified patent rights, because doing so would have been more costly than appeared to be justified. If any of the holders of the identified patents were to assert patent rights against us, the development and sale of PRO 140 could be delayed, we could be required to spend time and money defending patent litigation, and we could incur liability for infringement or be enjoined from producing our products if the patent holders prevailed in an infringement suit.

If we are sued for infringing on third-party intellectual property rights, it will be costly and time-consuming, and an unfavorable outcome would have a significant adverse effect on our business.

Our ability to commercialize our product candidates depends on our ability to use, manufacture and sell those products without infringing the patents or other proprietary rights of third parties. Numerous U.S. and foreign issued patents and pending patent applications owned by third parties exist in the monoclonal antibody therapeutic area in which we are developing drug candidates and seeking new potential drug candidates. There may be existing patents, unknown to us, on which our activities with our drug candidates could infringe.

If a third party claims that our actions infringe on its patents or other proprietary rights, we could face a number of issues that could seriously harm our competitive position, including, but not limited to:

If any of these events occur, it could significantly harm our operations and financial condition and negatively affect our stock price.

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We may undertake infringement or other legal proceedings against third parties, causing us to spend substantial resources on litigation and exposing our own intellectual property portfolio to challenge.

We may come to believe that third parties are infringing on our patents or other proprietary rights. To prevent infringement or unauthorized use, we may need to file infringement and/or misappropriation suits, which are very expensive and time-consuming and would distract management’s attention. Also, in an infringement or misappropriation proceeding a court may decide that one or more of our patents is invalid, unenforceable, or both, in which case third parties may be able to use our technology without paying license fees or royalties. Even if the validity of our patents is upheld, a court may refuse to stop the other party from using the technology at issue on the ground that the other party’s activities are not covered by our patents.

We may become involved in disputes with our present or future contract partners over intellectual property ownership or other matters, which would have a significant effect on our business.

Inventions discovered in the course of performance of contracts with third parties, may become jointly owned by our strategic partners and us, in some cases, and the exclusive property of one of us, in other cases. Under some circumstances, it may be difficult to determine who owns a particular invention or whether it is jointly owned, and disputes could arise regarding ownership or use of those inventions. Other disputes may also arise relating to the performance or alleged breach of our agreements with third parties. Any disputes could be costly and time-consuming, and an unfavorable outcome could have a significant adverse effect on our business.

The significant number of common shares issuable upon conversion of outstanding notes and exercise of outstanding warrants could adversely affect the trading price of our common shares.

Conversion of outstanding notes into common shares and the sale of such shares into the trading market of common shares or exercise of our warrants could depress the market price of our common shares.

Our auditors have issued a going concern opinion and it is likely we will not be able to achieve our objectives and will have to cease operations unless our future attempts to raise capital are successful.

Our auditors issued a going concern opinion in connection with the audit of our annual financial statements for the fiscal year ended May 31, 2013. A going concern opinion means that there is doubt that the company can continue as an ongoing business for the next 12 months. We will need to raise additional funds within the next three to six months in order to continue our business operations. There is no assurance that we will be able to adequately fund our operations.

The market price for our common shares has been and is likely to continue to be volatile.

The market price for our common shares has been and is likely to continue to be volatile. The volatile nature of our common share price may cause investment losses for our shareholders. The market price of stock in a development stage biotech company may often be driven by investor sentiment, expectation and perception, all of which are independent of fundamental valuation metrics or traditional financial performance metrics, thereby exacerbating volatility. In addition, our common shares are quoted on the OTCQB of the OTC Markets marketplace, which may increase price quotation volatility and could limit liquidity, all of which may adversely affect the market price of our shares—and thus, the economic incentive for noteholders to convert into common shares—and our ability to raise additional capital. The stock market has experienced significant volatility, particularly with respect to pharmaceutical, biotechnology and other life sciences company stocks.

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You may experience dilution of your ownership because of the future issuance of additional common shares or other securities.

We may conduct sales of our securities at prices per share below the current market price for our common stock, resulting in dilution to shareholders at the time. Sales of substantial amounts of shares in the public market, or the perception that such sales could occur, may adversely affect the prevailing market price of our common stock and make it more difficult for us to raise additional capital.

We do not expect any cash dividends to be paid on our shares in the foreseeable future.

We have never declared or paid a cash dividend and we do not anticipate declaring or paying dividends for the foreseeable future. We expect to use future financing proceeds and earnings, if any, to fund operating expenses. Consequently, shareholders’ only opportunity to achieve a return on their investment is, if the price of our stock appreciates and they sell their shares at a profit. We cannot assure shareholders of a positive return on their investment when they sell their shares, nor can we assure that shareholders will not lose the entire amount of their investment.

If the beneficial ownership of our stock continues to be highly concentrated, it may prevent you and other shareholders from influencing significant corporate decisions.

Our significant shareholders may exercise substantial influence over the outcome of corporate actions requiring shareholder approval, including the election of directors, any merger, consolidation or sale of all or substantially all of our assets or any other significant corporate transactions. These shareholders may also vote against a change of control, even if such a change of control would benefit our other shareholders.

Our common shares are classified as “penny stock” and trading of our shares may be restricted by the SEC’s penny stock regulations.

Rules 15g-1 through 15g-9 promulgated under the Exchange Act impose sales practice and disclosure requirements on certain brokers-dealers who engage in transactions involving a “penny stock.” The SEC has adopted regulations which generally define “penny stock” to be any equity security that has a market price of less than $5.00 per share or an exercise price of less than $5.00 per share, subject to certain exceptions. Our common shares are covered by the penny stock rules, which impose additional sales practice requirements on broker-dealers who sell to persons other than established customers and “accredited investors.” The penny stock rules require a broker-dealer, prior to a transaction in a penny stock not otherwise exempt from the rules, to deliver a standardized risk disclosure document in a form prepared by the SEC which provides information about penny stocks and the nature and level of risks in the penny stock market. The broker-dealer also must provide the customer with current bid and offer quotations for the penny stock, the compensation of the broker-dealer and its salesperson in the transaction, and monthly account statements showing the market value of each penny stock held in the customer’s account. In addition, the penny stock rules require that, prior to a transaction in a penny stock that is not otherwise exempt, the broker-dealer must make a special written determination that the penny stock is a suitable investment for the purchaser and receive the purchaser’s written agreement to the transaction. These disclosure requirements may have the effect of reducing the level of trading activity in the secondary market for stock that is subject to these penny stock rules. Consequently, these penny stock rules may affect the ability of broker-dealers to trade our securities. We believe that the penny stock rules may discourage investor interest in and limit the marketability of our common shares.

We may continue to have potential liability with respect to the rights of some shareholders to rescind their investment in our securities.

In March 2011, we disclosed that certain of our shares sold between 2008 and the date of disclosure may have been sold in violation of the federal securities laws of the United States. For further information on the sale of securities in violation of federal and state securities laws, please see Note 3 to our Consolidated Financial Statements included in Item 8 of this report. Management’s analysis, based upon various statutes of limitations,

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among other issues, indicates that the Company’s estimated rescission liability as of May 31, 2013, has declined to a total of $536,500. Since the issue of potential rescission liability was first disclosed by the Company in early 2011, no investor has asserted rescission rights.