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," "may," "will," "should," "seeks" 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 CORLUXฎand future product candidates, including CORT 108297;

• estimates of the dates by which we expect to report results of our clinical trials and the anticipated results of these 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

We are developing our lead compound, 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 results of our initial three Phase 3 trials in which CORLUX was evaluated for treating the psychotic features of psychotic depression.

We reported the results of Study 06, the last of the three Phase 3 trials during 2007. The 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 the plasma levels of CORLUX and clinical outcome. Response rates for patients whose plasma levels rose above 1661 nanograms of CORLUX per milliliter of plasma were statistically different than both those patients whose plasma levels were below that threshold and those patients who received placebo. In particular, those patients in Study 06 who achieved a CORLUX concentration of 1661 nanograms per milliliter of plasma separated from the placebo group with statistical significance on the primary endpoint. Conversely, at substantially lower plasma levels of CORLUX, there was no distinguishable difference in response rates 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 greater clinical benefit than the placebo group. 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 (Study 14), which commenced enrollment in March of 2008. The protocol for this trial incorporates what we have learned from the three completed trials to address the established relationship between increased drug plasma levels and clinical response and attempts to decrease the random variability observed in the results of the psychometric instruments used to measure efficacy. In Study 06, Corcept prospectively tested and confirmed that 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; this threshold was established from data produced in earlier studies. As expected, patients who took 1200 mg of CORLUX developed higher drug plasma levels than patients who received lower doses. Further, there was no discernable difference in the incidence of adverse events between placebo and any of the three CORLUX dose groups in Study 06. Based on this information, we are using a CORLUX dose of 1200 mg once per day for seven days in Study 14. In addition, we also are utilizing a third party centralized rating service to independently evaluate the patients for entry into the study as well as for response. We believe the centralization of this process will improve the consistency of rating across clinical trial sites and reduce the background noise that was illustrated in earlier studies and is endemic to many psychopharmacologic studies. We believe that this change in dose, as well as the other modifications to the protocol, should allow us to demonstrate the efficacy of CORLUX in the treatment of the psychotic symptoms of psychotic depression. Due to the relatively high cost of this program, length of the trial and current financial constraints, we are scaling back our planned rate of spending on this trail and extending the timeline for its completion.

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 newly diagnosed 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 our single 50-patient open-label study may provide a reasonable basis for the submission of a New Drug Application (NDA) for this indication. This trial was opened for enrollment in December 2007. We are targeting completion of enrollment by the end of 2009, and should have accumulated a full data set on all 50 patients by mid-2010.

Management of Weight Gain induced by Antipsychotics

In 2005, we published the results of studies in rats that demonstrated that CORLUX, a potent GR-II (cortisol) receptor antagonist, both reduced the weight gain associated with the ongoing use of olanzapine and mitigated the weight gain associated with the initiation of treatment with olanzapine (the active ingredient in Zyprexa). This study was paid for by Eli Lilly and Company (Lilly).

During 2007 we announced positive results from our clinical proof-of-concept study evaluating the ability of CORLUX to mitigate weight gain associated with the use of Zyprexa. This study in lean healthy male volunteers was initiated during the first quarter of 2006. The results show a statistically significant reduction in weight gain in those subjects who took Zyprexa plus CORLUX compared to those who took Zyprexa alone. Also, the addition of CORLUX to treatment with Zyprexa had a beneficial impact on secondary metabolic measures such as fasting insulin, and triglycerides and abdominal fat, as measured by waist circumference. Lilly provided Zyprexa and financial support for this study. In January 2009 we announced positive results from a similar proof-of-concept study evaluating the ability of CORLUX to mitigate weight gain associated with the use of Johnson & Johnson's Risperdal. This study, which began in 2008, confirmed the earlier results seen with CORLUX and Zyprexa, demonstrating a statistically significant reduction in weight and secondary metabolic endpoints of fasting insulin, triglycerides and abdominal fat, as measured by waist circumference.

The combination of Zyprexa or Risperdal and CORLUX is not approved for any indication. The purpose of these studies 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 Zyprexa, Risperdal, Clozaril and Seroquel, 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.

Research

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. Composition of matter patents on two of the series have been allowed in Europe, while substantive examination in the corresponding United States applications has not yet begun. United States and European applications have been filed for composition of matter patents in the third series, and are currently undergoing substantive examination. 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 PR (progesterone), ER (estrogen), AR (androgen) or GR-I (mineralocorticoid) receptors.

New Chemical Entity-CORT 108297

In 2007, we commenced a human microdosing study of one of our newly identified selective GR-II antagonists, CORT 108297, with Xceleron Limited utilizing their Accelerator Mass Spectrometry technology. In this microdosing study, we evaluated CORT 108297, a compound which develops particularly high plasma and brain concentrations in an animal model. On May 1, 2008, we announced the results from this study, which demonstrated that CORT 108297 was extremely well absorbed, demonstrated good bioavailability and had a half-life that appears compatible with once-a-day oral dosing. In addition, further pharmacokinetic testing of CORT 108297 in a rat model indicated that a ten-fold increase in oral dose (5 milligrams per kilograms to 50 milligrams per kilograms) led to a proportional increase in the amount of compound detected in plasma.

In September 2008, we signed a second agreement with Lilly, under which Lilly agreed to provide funding and provide olanzapine for two studies to test the effectiveness of CORT 108297 in rat models of olanzapine induced weight gain. In January 2009 we announced top-line results from these studies of CORT 108297 and olanzapine. The results from the studies of both the prevention and reversal of antipsychotic-induced weight gain were positive and statistically significant.

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 and common 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 limited revenue under the agreements 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 2008 other than the revenue under the agreements with Lilly, and do not expect to generate significant revenue for the foreseeable future. As of December 31, 2008, we had an accumulated deficit of $130.1 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.

Results of Operations

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

During the years ended December 31, 2008 and 2007, we recognized approximately $209,000 and $482,000, respectively, under these agreements. There will be no significant revenue under the agreements in the future as the majority of the activities were completed by December 31, 2008.

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, enrollment and monitoring expenses, regulatory costs, the costs of manufacturing development and the costs of manufacture and / or acquisition of clinical trial materials.

Research and development expenses increased 80% to $14.2 million for the year ended December 31, 2008, from $7.9 million for the year ended December 31, 2007. The increase in expenses reflects clinical trial cost increases of approximately $5.1 million related to new trials in psychotic depression, Cushing's Syndrome and the mitigation of weight gain caused by Risperidal, which were partially offset by decreases of approximately $3.1 million due to the substantial completion of our earlier Phase 3 clinical trials for psychotic depression, our cardiac study and our earlier proof of concept study in the mitigation of Zyprexa induced weight gain in 2007. During 2008, we also performed two smaller clinical studies to test formulation development and drug-drug interaction at a cost of approximately $705,000. During the year ended December 31, 2008 as compared to 2007, there were also increases in contract research expenses of approximately $750,000 due to basic research work on new chemical compounds, approximately $495,000 related to other research and preclinical work with our selective new GR-II antagonist, CORT 108297, and approximately $209,000 of costs associated with the rat studies using this compound in combination with olanzapine, which are being conducted in connection with the agreement with Lilly discussed above. In addition, during the year ended December 31, 2008, there was an increase in manufacturing expenses of approximately $925,000 due to the acquisition and manufacture of materials for the new clinical trials and manufacturing process development. During the year ended December 31, 2008, as compared to 2007, there were also increases in consulting expenses of approximately $530,000 and in staffing costs of approximately $565,000 to provide the resources necessary to support the increasing trial activities, which included increases in non-cash stock-based compensation of approximately $55,000. The expansion of the trial activities also caused an increase in travel costs of approximately $135,000 and in the allocation of facilities cost of approximately $115,000 during 2008 as compared to 2007.

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 discussed above included stock based compensation charges related to option grants to individuals performing these functions of approximately $270,000, $240,000 and $575,000, respectively, for the years ended December 31, 2008, 2007 and 2006. The increase in expense between 2008 and 2007 was the result of expense related to new option grants calculated on a straight-line basis, which was partially offset by the decrease of expense due to the declining scale of expense related to earlier option grants that were being expensed using the graded vesting method. The decrease in expense 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 and 2006, 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 and $40,000, 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. There were no terminations or conversions to consultant during 2008.

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

                                                                      Year Ended
                                                                     December 31,
Project                                                       2008       2007        2006
                                                                    (in thousands)
CORLUX for the treatment of the psychotic features of
psychotic depression                                        $  8,032    $ 5,645    $ 19,759
CORLUX for other clinical programs                             3,311      1,085         276
Drug discovery research                                        2,186        917         264
CORT 108297 pre-clinical development                             355         -           -
Stock-based compensation                                         268        213         535

Total research and development expense                      $ 14,152    $ 7,860    $ 20,834

We expect that research and development expenditures will increase during 2009 as compared to 2008 due to the continuation of our Phase 3 studies in Cushing's Syndrome and psychotic depression, and to the continued development of our proprietary selective GR-II antagonists. Research and development expenses in 2010 and future years will be largely dependent on the availability of additional funds to finance clinical development plans. See also, "Liquidity and Capital Resources".

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. The cost and timing of development of our selective GR-II antagonists will be dependent on our success in the effort and any difficulties that may be encountered. 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 increased 18% to $5.7 million for the year ended December 31, 2008 from $4.9 million for the year ended December 31, 2007. The increase in costs between years was primarily an increase of approximately $510,000 of legal costs related to patent activities and combined increases in staffing and consultancy costs of approximately $415,000. The changes in staffing costs include increases in non-cash

stock-based compensation of approximately $510,000 and in recruiting costs of approximately $130,000, which were partially offset by a decrease of approximately $320,000 related to bonus compensation. The increase in stock-based compensation was the net result of approximately $315,000 of costs associated with additional stock options being expensed under the straight-line method, decreases of approximately $200,000 associated with the declining scale of expense of options accounted for under the graded vesting method and to the inclusion in 2007 of a reversal of approximately $395,000 of stock-compensation expense in connection with the resignation of an officer, which represented 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.

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 as compared to 2006 was the net result of the inclusion in 2007 of the reversal of approximately $395,000 of stock-compensation expense in connection with the resignation of an officer, discussed above. 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.

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