Forward-Looking Statements

This Management's Discussion and Analysis of Financial Condition and Results of Operations contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and Section 27A of the Securities Act of 1933, as amended and should be read in conjunction with the "Risk Factors" section of Part I of this Form 10-K. All statements contained in this Form 10-K other than statements of historical fact are forward-looking statements. When used in this report or elsewhere by management from time to time, the words "believe," "anticipate," "intend," "plan," "estimate," "expect," and similar expressions are forward-looking statements. Such forward-looking statements are based on current expectations, but the absence of these words does not necessarily mean that a statement is not forward-looking. Forward-looking statements may include, but are not limited to, statements about:

• the progress and timing of our research, development and clinical programs and the timing of regulatory activities;

• the timing of the market introduction of CORLUX® and future product candidates;

• estimates of the dates by which we expect to report results of our clinical trials;

• our ability to market, commercialize and achieve market acceptance for CORLUX or other future product candidates;

• uncertainties associated with obtaining and enforcing patents;

• our estimates for future performance; and

• our estimates regarding our capital requirements and our needs for, and ability to obtain, additional financing.

Forward-looking statements are not guarantees of future performance and involve risks and uncertainties. Actual events or results may differ materially from those discussed in the forward-looking statements as a result of various factors. For a more detailed discussion of such forward-looking statements and the potential risks and uncertainties that may impact upon their accuracy, see "Risk Factors" included in Part I of this Form 10-K and the "Overview" and "Liquidity and Capital Resources" sections of this Management's Discussion and Analysis of Financial Condition and Results of Operations. These forward-looking statements reflect our view only as of the date of this report. Except as required by law, we undertake no obligations to update any forward looking statements. Accordingly, you should also carefully consider the factors set forth in other reports or documents that we file from time to time with the Securities and Exchange Commission.

Overview

We are a pharmaceutical company engaged in the development of medications for the treatment of severe psychiatric and metabolic diseases. Since our inception in May 1998, we have been developing our lead product, CORLUX, a glucocorticoid receptor II, or GR-II, antagonist.

Psychotic Depression

Our lead program is for the development of CORLUX for the treatment of the psychotic features of psychotic major depression, under an exclusive patent license from Stanford University. Psychotic major depression, or PMD, will hereinafter be referred to as psychotic depression. The United States Food and Drug Administration, or FDA, has granted "fast track" status to evaluate the safety and efficacy of CORLUX for the treatment of the psychotic features of psychotic depression. Between August 2006 and March 2007 we announced the top line results of our initial three Phase 3 trials in which CORLUX was evaluated for treating the psychotic features of psychotic depression.

We reported the initial results of Study 06, the last of the three Phase 3 trials, in March 2007. These results indicated that this study did not achieve statistical significance with respect to the primary endpoint, 50% improvement in the Brief Psychiatric Rating Scale Positive Symptom Subscale, or BPRS PSS, at Day 7 and at Day 56. However, there was a statistically significant correlation between plasma levels and clinical outcome achieved during treatment. Patients whose plasma levels rose above a predetermined threshold statistically separated from both those patients whose plasma levels were below the threshold and those patients who received placebo. In particular, those patients in Study 06 who achieved a predetermined level of 1661 nanograms of CORLUX per milliliter of plasma separated from the placebo group with statistical significance for the primary endpoint. Conversely, at substantially lower plasma levels, there was no distinguishable response rate between patients who received CORLUX and those receiving placebo. This study confirms a similar finding in Study 07 that at higher plasma levels the drug candidate is able to demonstrate desired clinical effects. Further, the incidence of serious adverse events did not differ between placebo and any of the three CORLUX dose groups.

Data aggregated from our major efficacy studies of similar design, Study 03, Study 06, Study 07 and Study 09, (724 observed cases) indicate that the patients who received CORLUX separated from the placebo group with statistical significance for the endpoint, 50% improvement in the BPRS PSS at Day 7 and at Day 56. In addition, using the same endpoint, patients who achieved a drug level in their plasma that was greater than the 1661 nanograms per milliliter threshold mentioned above, statistically separated from both those patients whose plasma levels were below this threshold and those patients who received placebo.

We believe that the confirmation of a correlation between drug concentration and clinical response, as well as other observations from Study 06 and our other two completed Phase 3 clinical trials, serves as a strong basis for our current Phase 3 study, which commenced enrollment in March of 2008. The protocol for this trial incorporates what we have learned from the three completed trials addressing the established relationship between increased drug plasma levels and clinical response and attempt to decrease the random variability observed in the results of the psychometric instruments used to measure efficacy. In this trial we are using a dose level of 1200 mg once per day for seven days because, as expected, at successively higher dosages, more patients achieved the predetermined plasma concentration that correlates with response. In Study 06, 80% of the patients who took 1200 mg of Corlux achieved a drug plasma level sufficient for a strong clinical response. We have seen no difference in the safety data between any of the dose levels used in Study 06 in our initial review of a summary of that data. We believe that this change in dose, as well as other modifications to the protocol, should allow us to demonstrate the efficacy of CORLUX in the treatment of the psychotic symptoms of psychotic depression.

Management of Weight Gain induced by Antipsychotics

During 2007 we announced the top-line results of our proof-of-concept study evaluating the ability of CORLUX to mitigate weight gain associated with the use of olanzapine. This study in healthy male volunteers was initiated during the first quarter of 2006. The top line results indicated a statistically significant reduction in weight gain in those subjects who took olanzapine plus CORLUX compared to those who took olanzapine alone. Eli Lilly and Company, or Lilly, provided olanzapine and financial support for this study.

The combination of olanzapine and CORLUX is not approved for any indication. The purpose of this study was to explore the hypothesis that GR-II antagonists would mitigate weight gain associated with atypical antipsychotic medications. The group of medications known as atypical antipsychotics, including olanzapine, risperidone, clozapine and quetiapine, are widely used to treat schizophrenia and bipolar disorder. All medications in this group are associated with treatment emergent weight gain of varying degrees and carry a warning label relating to treatment emergent hyperglycemia and diabetes mellitus.

In April 2005, we announced results from two preclinical studies conducted in a rat model of olanzapine induced weight gain. These studies demonstrated that CORLUX reduced both the weight gain associated with ongoing olanzapine use and prevented the weight gain associated with the initiation of treatment with olanzapine.

Cushing's Syndrome

In July 2007, we received Orphan Drug Designation from the FDA for CORLUX for the treatment of Cushing's Syndrome. Cushing's Syndrome is a disorder caused by prolonged exposure of the body's tissues to high levels of the hormone cortisol. Sometimes called "hypercortisolism," it is relatively rare and most commonly affects adults aged 20 to 50. An estimated 10 to 15 of every one million people are affected each year.

Orphan Drug Designation is a special status granted by the FDA to encourage the development of treatments for diseases or conditions that affect fewer than 200,000 patients in the United States. Drugs that receive Orphan Drug Designation obtain seven years of marketing exclusivity from the date of drug approval as well as tax credits for clinical trial costs, marketing application filing fee waivers and assistance from the FDA in the drug development process.

The Investigational New Drug application (IND) for the evaluation of CORLUX for the treatment of Cushing's Syndrome was opened in September 2007. The FDA has indicated that a single study may provide a reasonable basis for the submission of a New Drug Application (NDA) for this indication. This trial is now open for enrollment.

Research and Human Biology

In July 2007, we executed an agreement with Xceleron Limited to conduct a human microdosing study of one of Corcept's new chemical entities, a selective GR-II antagonist, utilizing Xceleron's Accelerator Mass Spectrometry, or AMS, technology. In early 2003, we initiated a discovery research program to identify and patent selective GR-II antagonists to develop a pipeline of products for proprietary use. Three distinct series of GR-II antagonists were identified. These compounds appear to be as potent as our lead product CORLUX in blocking cortisol but, unlike CORLUX, they do not appear to block the progesterone or other steroid receptors. We are evaluating one of the compounds, which develops particularly high plasma and brain concentrations in an animal model, in a human microdosing study using Xceleron's AMS technology.

During 2007 and early 2008 we signed agreements with our contract research scientists to continue our discovery research activities on new compounds for through June 2008.

General

Our activities to date have included:

• product development;

• designing, funding and overseeing clinical trials;

• regulatory affairs; and

• intellectual property prosecution and expansion.

Historically, we have financed our operations and internal growth primarily through private placements of our preferred stock and the public sale of common stock rather than through collaborative or partnership agreements. Therefore, we have no research funding or collaborative payments payable to us, except for the revenue under the agreement with Lilly discussed above.

We are in the development stage and have incurred significant losses since our inception. We have not generated any revenue through December 2007 other than the revenue under the collaboration agreement with Lilly, and do not expect to generate significant revenue for the foreseeable future. As of December 31, 2007, we had an accumulated deficit of $110.0 million. Our historical operating losses have resulted principally from our research and development activities, including clinical trial activities for CORLUX, discovery research,

non-clinical activities such as toxicology and carcinogenicity studies, manufacturing process development and regulatory activities, as well as general and administrative expenses. We expect to continue to incur net losses over at least the next several years as we continue our CORLUX clinical development program, apply for regulatory approvals, initiate development of newly identified GR-II antagonists for various indications, continue our discovery research program, acquire and develop treatments in other therapeutic areas, establish sales and marketing capabilities and expand our operations.

Our business is subject to significant risks, including the risks inherent in our research and development efforts, the results of our CORLUX clinical trials, uncertainties associated with securing financing, uncertainties associated with obtaining and enforcing patents, our investment in manufacturing set-up, the lengthy and expensive regulatory approval process and competition from other products. Our ability to successfully generate revenues in the foreseeable future is dependent upon our ability, alone or with others, to finance our operations and develop, obtain regulatory approval for, manufacture and market our lead product.

In April 2007, Nasdaq granted our request to transfer the listing of our common stock from the Nasdaq Global Market to the Nasdaq Capital Market. Since transferring to the Nasdaq Capital Market, we have been in compliance with all listing requirements.

Results of Operations

Collaboration revenue-Collaboration revenue relates to services rendered in connection with our agreement with Lilly discussed above under the caption "Overview-Management of Weight Gain induced by Antipsychotics." Under the agreement, Lilly agreed to supply olanzapine and pay for the costs of the study. We were required to perform development activities as specified in this agreement and we were reimbursed based on the costs associated with the conduct of the trial and the preparation and packaging of clinical trial materials. Revenue was recognized as the services were rendered in accordance with the agreement.

During the years ended December 31, 2007 and 2006, we recognized approximately $482,000 and $294,000, respectively, under this agreement. There will be no significant revenue under this agreement in the future as the majority of the activities were completed during 2007.

Research and development expenses. Research and development expenses include the personnel costs related to our development activities, including non-cash stock-based compensation, as well as the costs of discovery research, pre-clinical studies, clinical trial preparations, enrolment and monitoring expenses, regulatory costs and the costs of manufacturing development.

Research and development expenses decreased 62% to $7.9 million for the year ended December 31, 2007, from $20.8 million for the year ended December 31, 2006. The decrease in expenses reflects clinical trial cost decreases of approximately $13.7 million due to the substantial completion of our earlier Phase 3 clinical trials for psychotic depression in late 2006 and early 2007, which were partially offset by approximately $145,000 in costs associated with the preparations for our upcoming psychotic depression trial and increases in clinical trial costs related to other programs of approximately $510,000. During the year ended December 31, 2007 as compared to 2006, there were also increases in contract research expenses of approximately $725,000 due to basic research work in new chemical compounds and the initiation of the micro-dosing study on a selected compound, increases in analytical testing of approximately $75,000 and increases in manufacturing expenses of approximately $360,000 due to the manufacture of additional materials for upcoming clinical trials and manufacturing process development. In addition, during the year ended December 31, 2007 as compared to 2006, there were decreases in pre-clinical studies of approximately $995,000 and staffing expenses of approximately $480,000, which included decreases in non-cash stock-based compensation of approximately $275,000. The decreases in staffing expenses were offset by increases in consulting and professional fees of $435,000 for 2007 as compared to 2006.

Research and development expenses increased 22% to $20.8 million for the year ended December 31, 2006 from $17.1 million for 2005. The increase in expenses between years reflect clinical trial cost increases of approximately $4.7 million for 2006 as compared to 2005 primarily related to clinical trial expenses for our first three Phase 3 psychotic depression studies. This increase was partially offset by a reduction in 2006 of approximately $450,000 in expenses for our discovery research program due to the successful conclusion of a program focusing on the discovery of new chemical entities that will be available for future development.

During 2006 as compared to 2005, the costs of our clinical program also reflected a decrease of approximately $695,000 from the conclusion of our study in mild to moderate Alzheimer's disease in 2005 and an increase of approximately $275,000 related to the commencement of the olanzapine induced weight gain mitigation clinical trial in collaboration with Lilly. In addition, during 2006, as compared to 2005 there were decreases in pre-clinical studies and manufacturing development of approximately $365,000 and $205,000, respectively, decreases in travel, consulting and other expenses of $435,000 and increases in staffing expenses of approximately $545,000. The increases in staffing expenses were primarily due to higher non-cash stock-based compensation expense.

Research and development expenses discussed above included stock based compensation charges related to option grants to individuals performing these functions of approximately $240,000, $575,000 and $224,000, respectively, for the years ended December 31, 2007, 2006 and 2005. The increase in expense between 2006 and 2005 was due principally to the implementation of SFAS 123R in January 2006. The decrease between 2007 and 2006 was due principally to the cancellation of unvested options due to the resignation of an employee early in 2007, which was partially offset by increases in expense related to options granted during 2007. In addition, during the years ended December 31, 2007, 2006 and 2005 upon the termination of employees or the change in status of employees who worked in a development function to consultants, we recorded reversals of approximately $25,000, $40,000 and $250,000, respectively, of previously reported stock-based compensation expense, which represents the difference between the expense recorded and the expense that would have been recorded based upon the rights to options that vested during the service of these individuals as employees. See the discussion below under the caption "Stock-based compensation for options to employees-impact of adopting SFAS 123R" regarding the impact of adoption in January 2006.

Below is a summary of our research and development expenses by major project:

                                                                    Year Ended
                                                                   December 31,
Project                                                   2007         2006         2005
                                                                  (in thousands)
CORLUX for the treatment of the psychotic features
of psychotic depression                                  $ 5,645     $ 19,759     $ 15,391
CORLUX for other clinical programs                         1,085          276          954
Drug discovery research                                      917          264          755
Stock-based compensation                                     213          535          (26 )

Total research and development expense                   $ 7,860     $ 20,834     $ 17,074

We expect that research and development expenditures will increase during 2008 as compared to 2007 due to the commencement of our Phase 3 studies in Cushing's Syndrome and psychotic depression, the clinical trials to further evaluate the management of weight gain induced by antipsychotic medications, and to continue development of our proprietary selective GR-II antagonists. Research and development expenses in 2009 and future years will be largely dependent on the availability of additional funds to finance clinical development plans based on our experience from prior trials. See also, the "Liquidity and Capital Resources" section in this Form 10-K.

Many factors can affect the cost and timing of our trials including inconclusive results requiring additional clinical trials, slow patient enrollment, adverse side effects in study patients, insufficient supplies for our clinical trials and real or perceived lack of effectiveness or safety of the drug in our trials. In addition, the development of all of our product candidates will be subject to extensive governmental regulation. These factors make it difficult for us to predict the timing and costs of the further development and approval of our product candidates.

General and administrative expenses. General and administrative expenses consist primarily of the costs of administrative personnel and related facility costs along with legal, accounting and other professional fees.

General and administrative expenses decreased 3% to approximately $4.9 million for the year ended December 31, 2007, from $5.0 million for the year ended December 31, 2006. The decrease in costs between years was comprised of decreases in legal and professional fees of approximately $100,000 due primarily to lower costs related to patents. Staffing costs also decreased by approximately $30,000 in 2007 as compared to 2006. The changes in staffing costs included a decrease in non-cash stock-based compensation of approximately $160,000, which was offset by increases in salaries and wages of $125,000.

The decreases in stock-based compensation expense during 2007 included a reversal of approximately $395,000 of stock-compensation expense during the second quarter of 2007 in connection with the resignation of an officer, which represents the excess of expense under the graded vesting method as compared with the expense associated with stock options that actually vested prior to this termination. There were net increases of approximately $195,000 between 2007 and 2006 in stock-based compensation charges related to stock options granted to officers and employees during 2007, which were partially offset by declining expense of earlier options due to the decelerating scale of expense under the graded vesting method and options cancelled due to the termination.

General and administrative expenses increased 23% to $5.0 million for the year ended December 31, 2006, from $4.1 million for the year ended December 31, 2005. The increase in 2006 as compared to 2005 was primarily due to increases in professional fees of approximately $560,000 and increases in staffing costs of approximately $455,000. The increases in staffing expenses were primarily due to higher non-cash stock-based compensation expense.

General and administrative expenses included stock-based compensation expense related to option grants to individuals performing these functions of approximately $1.2 million, $1.0 million and $800,000, respectively, for the years ended December 31, 2007, 2006 and 2005. See discussion below under the caption "Stock-based compensation for options to employees-impact of adopting SFAS 123R" regarding the impact of adoption in January 2006.

The amount of general and administrative expenses in 2008 and future years will be largely dependent on our assessment of the staff necessary to support our continued clinical development activities and the availability of additional funds. See also, the "Liquidity and Capital Resources" section in this Form 10-K.

Interest and other income, net. Interest and other income, net of investment management fees, was approximately $690,000 for the year ended December 31, 2007 as compared to $720,000 for the same period in 2006 and $1.1 million in 2005. The decreases in each successive period were principally attributable to decreased interest on investments due to lower average balance of invested funds that were partially offset by higher yields on the investment portfolios.

Other expense. Other expense was approximately $15,000 for the year ended December 31, 2007 as compared to $10,000 for the same period in 2006 and $50,000 in 2005. Other expense includes interest expense on capitalized leases entered into during the second quarter of 2005 and state tax on capital which is based on our capital and asset positions as of each year-end.

Liquidity and Capital Resources

We have incurred operating losses since inception, and at December 31, 2007, we had a deficit accumulated during the development stage of $110.0 million. Since our inception, we have relied primarily on the proceeds from public and private sales of our equity securities to fund our operations. On March 30, 2007, we sold 9 million shares of common stock at a price of $1.00 per share in a private placement, which generated net proceeds of approximately $8.8 million after deducting issuance costs. During the third quarter of 2007, we sold approximately 4.8 million shares of common stock at a price of $2.10 per share in a private placement, which generated net proceeds of approximately $10.0 million after deducting issuance costs.

At December 31, 2007, we had cash, cash equivalents and investments balances of $17.4 million, compared to $9.5 million at December 31, 2006. Net cash used in operating activities for the years ended December 31, 2007, 2006 and 2005, were $11.0 million, $23.2 million and $17.2 million, respectively. The use of cash in each period was primarily a result of net losses associated with our research and development activities and amounts incurred to develop our administrative infrastructure. We expect cash used in operating activities to increase during 2008 and later years due to the continuation and expansion of our development programs for psychotic depression, Cushing's Syndrome and the management of weight gain induced by atypical antipsychotic medications, research activities, commercialization activities and general and administrative expenses.

On March 25, 2008, we sold approximately 8.9 million shares of our common stock at a price of $2.77 per share and warrants to purchase approximately 4.5 million shares of its common stock, at a price of $0.125 per warrant in a private placement. The warrants have a seven year term and an exercise price of $2.77 per share. The March 2008 Financing generated approximately $25 million in net proceeds, after deducting the costs of issuance.

On March 25, 2008, we entered into a Committed Equity Financing Facility (CEFF) with Kingsbridge Capital Limited (Kingsbridge), a private investment group. Under the terms of the agreement, Kingsbridge has committed to provide up to $60 million of capital in exchange for newly-issued shares of Corcept's common stock for a period of up to three years after the Securities and Exchange Commission declares effective the registration statement to be filed by Corcept covering the resale of the shares of common stock issuable in connection with the CEFF and the shares of common stock underlying the warrant discussed below. The maximum number of shares that can be sold by Corcept under this agreement is approximately 9.6 million shares. Under the terms of the agreement, the . . .