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Article by DailyStocks_admin    (01-27-12 02:53 AM)


ZIOPHARM Oncology Inc. Director, 10% Owner RANDAL J KIRK bought 1923075 shares on 1-20-2012 at $ 5.2



ZIOPHARM Oncology, Inc. is a biopharmaceutical company that is seeking to develop and commercialize a diverse portfolio of in-licensed cancer drugs that can address unmet medical needs. Our principal focus has been on the licensing and development of proprietary small molecule drug candidates that are related to cancer therapeutics already on the market or in development and that can be administered by intravenous (“IV”) and/or oral dosing. Our clinical programs for our small molecule candidates include palifosfamide (Zymafos TM or ZIO-201) darinaparsin (Zinapar TM or ZIO-101) and indibulin (Zybulin TM or ZIO-301). Pursuant to a partnering arrangement with Intrexon Corporation, we are also now developing novel DNA-based biotherapeutics. Under the arrangement, we obtained rights to Intrexon’s effector platform for use in the field of oncology, including with respect to two existing product candidates of Intrexon. The first lead product, INXN 3001/1001, is currently in a Phase Ib study (that we are now conducting/sponsoring) and we expect to submit an Investigational New Drug (“IND”) application to the Food and Drug Administration (“FDA”) with respect to the second, INXN 2001/1001, during the first half of 2011. We plan to leverage Intrexon’s synthetic biology platform to develop products to stimulate key pathways used by the body’s immune system to inhibit the growth and metastasis of cancers, adding significantly to our small molecule drug development portfolio utilizing our global capabilities to translate science to the patient.

We believe that our strategy will result in expedited drug development programs with product candidates having a low cost of manufacturing to address changing reimbursement requirements around the world. We are currently in Phase I, II, and/or Phase III studies for our product candidates with a particular emphasis on completing a global palifosfamide pivotal Phase III trial to support registration in combination with doxorubicin in the front-line setting of soft tissue sarcoma.

More detailed descriptions of palifosfamide, darinaparsin and indibulin, INXN 3001/1001 and INXN 2001/1001, and our clinical development plans for each, are set forth in this report under the caption “Business — Product Candidates.”

We were originally incorporated in Colorado in September 1998 (under the name Net Escapes, Inc.) and later changed our name to “EasyWeb, Inc.” in February 1999. Following reincorporation in Delaware in May 2005 under the same name, we completed a “reverse” acquisition of privately held ZIOPHARM, Inc., a Delaware corporation on September 13, 2005. Although EasyWeb, Inc. was the legal acquirer in the transaction, we accounted for the transaction as a reverse acquisition under generally accepted accounting principles. As a result, ZIOPHARM, Inc. became the registrant with the SEC and the historical financial statements of ZIOPHARM, Inc. became our historical financial statements.

Our executive offices are located at 1180 Avenue of the Americas, 19 th Floor, New York, NY 10036, and our telephone number is (646) 214-0700. Our internet site is www.ziopharm.com . None of the information on our internet site is part of this report.
Cancer Overview

Cancer is a group of diseases characterized by either the runaway growth of cells or the failure of cells to die normally. Often, cancer cells spread to distant parts of the body, where they can form new tumors. Cancer can arise in any organ of the body and, according to the American Cancer Society, strikes one of every two American men and one of every three American women at some point in their lives.

It is reported that there are more than 100 different varieties of cancer. Carcinomas, the most common type of cancer, originate in tissues that cover a surface or line a cavity of the body. Lymphomas are cancers of the lymph system, which is a circulatory system that bathes and cleanses the body’s cells. Leukemias involve blood-forming tissues and blood cells. As their name indicates, brain tumors are cancers that begin in the brain, skin cancers, including melanomas, originate in the skin, while soft tissue sarcomas arise in soft tissue. Cancers are considered metastatic if they spread via the blood or lymphatic system to other parts of the body to form secondary tumors.

Cancer is caused by a series of mutations (alterations) in genes that control cells’ ability to grow and divide. Some mutations are inherited; others arise from environmental factors such as smoking or exposure to chemicals, radiation, or viruses that damage cells’ DNA. The mutations cause cells to divide relentlessly or lose their normal ability to die.

According to Cancer Statistics 2010 (published by the American Cancer Society in Cancer Facts & Figures 2011), it was estimated that 569,490 Americans would die from cancer in 2010 — more than 1,500 each day. The cost of treating cancer is significant. The National Institute of Health estimates that the overall cost of cancer in 2008 was $263.8 billion. This cost included an estimate of $102.8 billion in direct medical expenses and $160.9 billion in indirect mortality costs.
Cancer Treatments

Major treatments for cancer include surgery, radiotherapy, and chemotherapy; the latter including newer approaches generally referred to as anti-angiogenic, vascular disruption or targeted therapies. Also associated with the treatment of cancer is supportive care. While there are also hundreds of experimental treatments under investigation, including DNA and other immunological based therapies, we believe cancer treatment will remain a significant unmet medical need for the foreseeable future.

Radiotherapy : Also called radiation therapy, radiotherapy is the treatment of cancer and other diseases with ionizing radiation. Ionizing radiation deposits energy that injures or destroys cells in the area being treated (the target tissue) by damaging their genetic material, making it impossible for these cells to continue growing. Although radiation damages both cancer cells and normal cells, the latter are able to repair and regain proper function. Radiotherapy may be used to treat localized solid tumors such as cancers of the skin, tongue, larynx, brain, breast, or uterine cervix. It can also be used to treat leukemia and lymphoma.

Scientists are also looking for ways to increase the effectiveness of radiation therapy. Two types of investigational drugs are being studied for their effect on cells exposed to radiation. Radiosensitizers increase the damage done to tumor cells by radiation; radioprotectors protect normal tissues from the effects of radiation.

Cytotoxics : Cytotoxics are anticancer drugs that destroy cancer cells by stopping them from multiplying. Healthy cells, especially those that divide quickly, can also be harmed with the use of cytotoxics. Harm to healthy cells is what causes side effects. These cells usually repair themselves after chemotherapy and in many cases, newer agents may offer a greater therapeutic window — the difference between a dose that is helpful and one that is toxic.

Cytotoxic agents act primarily by disrupting cellular pathways involved in maintaining cellular integrity including blood supply, repair, or activity that affects the production or function of DNA, RNA, or protein. Although there are many cytotoxic agents, there is a considerable overlap in their mechanisms of action. As such, the choice of a particular agent or group of agents is generally not a consequence of a prior prediction of antitumor activity by the drug, but instead the result of empirical clinical trials.

Immunological and DNA-based approaches : With the approval of Dendreon’s PROVENGE® for prostate cancer, an immune based approach to treating cancer has been validated and a number of additional strategies that are DNA-based, including the approach by Intrexon Corporation, are in clinical progress, opening up a very promising new avenue to treat cancer.

Supportive Care : The treatment of a cancer may include the use of chemotherapy, radiation therapy, biologic response modifiers, surgery, or some combination of all of these or other therapeutic options. All of these treatment options are directed at killing or eradicating the cancer that exists in a patient’s body. Unfortunately, the delivery of many cancer therapies adversely affects the body’s normal organs. The undesired consequence of harming an organ not involved with cancer is referred to as a complication of treatment or a side effect.

In addition to anemia, fatigue, hair-loss, reduction in blood platelets and white and red blood cells, and bone pain, two of the most common side effects of chemotherapy are nausea and vomiting. Several drugs have been developed to help prevent and control chemotherapy-induced nausea and vomiting, including 5HT3 receptor antagonists such as ondansetron, which is a selective blocking agent of the hormone serotonin.

Product Candidates
ZIO-101, Darinaparsin, Zinapar TM

General . Darinaparsin is an anti-mitochondrial (organic arsenic) compound covered by issued patents and pending patent applications in the U.S. and in foreign countries. A form of commercially available inorganic arsenic (arsenic trioxide [Trisenox®] or “ATO”) has been approved in the United States, the European Union and Japan for the treatment of acute promyelocytic leukemia, a precancerous condition. In the United States, ATO is on the compendia listing for the therapy of multiple myeloma, and has been studied for the treatment of various other cancers. Nevertheless, ATO has been shown to be toxic to the heart, liver, and brain, which limits its use as an anti-cancer agent. ATO carries a “black box” warning for ECG abnormalities since arsenic trioxide has been shown to cause QT interval prolongation and complete atrioventricular block. QT prolongation can lead to a torsade de pointes -type ventricular arrhythmia, which can be fatal. Inorganic arsenic has also been shown to cause cancer of the skin and lung in humans. The toxicity of arsenic is generally correlated to its accumulation in organs and tissues. Our preclinical and clinical studies to date have demonstrated that darinaparsin is considerably less toxic than ATO, particularly with regard to cardiac toxicity.

In vitro testing of darinaparsin using the National Cancer Institute’s human cancer cell panel demonstrated activity against a series of tumor cell lines including lung, colon, brain, melanoma, ovarian, and kidney cancer. Moderate activity was shown against breast and prostate cancer tumor cell lines. In addition to solid tumors, in vitro testing in both the National Cancer Institute’s cancer cell panel and in vivo testing in a leukemia animal model demonstrated substantial activity against hematological cancers (cancers of the blood and blood-forming tissues) such as leukemia, lymphoma, myelodysplastic syndromes, and multiple myeloma. Results indicate significant activity against the HuT 78 cutaneous T-cell lymphoma, the NK-G2MI natural killer-cell NHL, KARPAS-299 T-cell NHL, SU-DHL-8 B-cell NHL, SU-DHL-10 B-cell NHL and SU-DHL-16 B-cell NHL cell lines. Preclinical studies have also established anti-angiogenic properties of darinaparsin, provided support for the development of an oral form of the drug, and established synergy of darinaparsin in combination with other approved anti-cancer agents.

Potential Lead Indication: Lymphoma . Three Phase II intravenous studies of IV darinaparsin evaluating hematological malignancies, myeloma and liver cancer, have been completed and data from these trials has been reported, the most promising being in lymphomas and particularly in peripheral T-cell lymphoma.

Clinical Development Plan for darinaparsin : Phase I testing of the intravenous (IV) form of darinaparsin in solid tumors and hematological cancers was completed and we reported clinical activity and, importantly, a safety profile from these studies as predicted by preclinical results. We subsequently completed Phase II studies in advanced myeloma, primary liver cancer and in certain other hematological cancers. At the May 2009 annual meeting of the American Society of Clinical Oncology (“ASCO”), we reported favorable results from the trial with IV-administered darinaparsin in lymphoma, particularly peripheral T-cell lymphoma. We have initiated a Phase I study of darinaparsin with the combination treatment regimen called “CHOP”, which is standard of care for front-line peripheral T-cell lymphoma (“PTCL”), as a basis to address the front-line setting of PTCL. Subject to FDA review, we presently plan to initiate a two-stage potentially pivotal trial likely in certain relapsed patients later this year. A Phase I trial for an oral form of darinaparsin is currently in progress and, upon completion, we anticipate conducting a Phase II study in solid tumors that would build upon recently reported preclinical work in which darinaparsin had a significant cytotoxic and radiosensitizing effect against different cancer cells under both normal and hypoxic conditions.

We have obtained Orphan Drug Designation for darinaparsin in the United States for the treatment of PTCL and have received a positive recommendation from the Committee for Orphan Medicinal Products (COMP) within the European Medicines Agency (EMA) for designation as an orphan medicinal product for the same indication.

General . Palifosfamide, or isophosphoramide mustard (“IPM”), is a proprietary active metabolite of the pro-drug ifosfamide. Ifosfamide, like the related drugs cyclophosphamide and bendamustine, is a DNA alkylating agent, which is a form of cancer therapy to treat a wide range of solid tumors and hematological malignancies. We believe that cyclophosphamide is the most widely used alkylating agent in cancer therapy, with significant use in the treatment of breast cancer and non-Hodgkin’s lymphoma. Bendamustine has been recently approved and successfully launched by Cephalon Oncology in the U.S. and Europe to treat certain hematological malignancies. Ifosfamide has been shown to be effective in the treatment of sarcoma and lymphoma, either by itself or in combination with other anticancer agents. Ifosfamide is approved by the FDA as a treatment for testicular cancer while ifosfamide-based treatment is a standard of care for sarcoma, although it is not approved for this indication by the FDA.

Our preclinical studies have shown that, in animal and laboratory models, palifosfamide evidences activity against leukemia and solid tumors. These studies also indicate that palifosfamide may have a better safety profile than ifosfamide or cyclophosphamide because it does not appear to produce known toxic metabolites of ifosfamide, such as acrolein and chloroacetaldehyde. Acrolein, which is toxic to the kidneys and bladder, can mandate the administration of a protective agent called mesna, which is inconvenient and expensive. Chloroacetaldehyde is toxic to the central nervous system, causing “fuzzy brain” syndrome for which there is currently no protective measure. Similar toxicity concerns pertain to high-dose cyclophosphamide, which is widely used in bone marrow and blood cell transplantation. Because palifosfamide is the active metabolite — without acrolein or chloroacetaldehyde metabolites — we believe that the administration of palifosfamide (without the administration of mesna) may avoid many of the toxicities of ifosfamide without compromising efficacy.

In addition to anticipated lower toxicity, palifosfamide may have other advantages over ifosfamide and cyclophosphamide. Palifosfamide cross-links DNA differently than the active metabolite of cyclophosphamide, resulting in a different activity profile. Moreover, in some preclinical studies, palifosfamide has evidenced activity against ifosfamide- and/or cyclophosphamide-resistan t cancer cell lines. Also in preclinical cancer models, palifosfamide was shown to be orally active and encouraging results have been obtained with palifosfamide in combination with doxorubicin, an agent approved to treat sarcoma.

Lead Indications for palifosfamide: Sarcoma . Sarcomas are cancers of the bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. There are more than 50 histological or tissue types of soft tissue sarcomas but with considerable homogeneity when the disease is metastatic. The prognosis for patients with soft tissue sarcoma depends on several factors, including the patient’s age, size of the primary tumor, histological grade, and stage of the tumor. Factors associated with a poorer prognosis include being older than 60 years of age, having tumors larger than five centimeters, and having tumors of high-grade histology. While small, low-grade tumors are usually curable by surgery alone, the higher-grade or larger sarcomas are associated with higher local treatment failure rates and increased metastatic potential.

Intravenous palifosfamide may be a useful agent that, either alone or in combination with other agents and doxorubicin in particular, may deliver therapeutic activity with fewer side effects of the type that have been associated with ifosfamide. In the United States, ifosfamide is regularly included in combination regimens for the treatment of sarcomas, testicular cancers, head and neck cancer, certain types of non-Hodgkin’s lymphomas, and other solid tumors including small-cell lung cancer (“SCLC”), although it is not formally approved by FDA for the treatment of soft tissue sarcoma. Doxorubicin, approved decades ago, is the only FDA-approved treatment for sarcoma. The Company believes that palifosfamide in combination with doxorubicin may be more effective than doxorubicin alone and with a far improved safety profile over the combination of ifosfamide use with doxorubicin.

Small-Cell Lung Cancer . SCLC is almost exclusively associated with smoking. Similar to sarcoma, standard of care for SCLC, which is etoposide and platinum therapy, has changed little in decades. Published studies of ifosfamide in combination with standard of care have evidenced enhanced efficacy but also with enhanced side effects, providing for an unfavorable benefit to risk association. We believe that combining palifosfamide with standard of care could offer a separation of enhanced efficacy from increased toxicity. An oral form of administration, for STS or SCLC as well as other solid tumors, could also offer a significant advancement to current therapy.

Clinical Development Plan for palifosfamide . Following completion of Phase I study, we completed Phase II testing of the intravenous form of palifosfamide as a single agent to treat advanced sarcoma. In both Phase I and Phase II testing, palifosfamide has been administered without the “uroprotectant” mesna, and the toxicities associated with acrolein and chloroacetaldehyde have not been observed. We reported clinical activity of palifosfamide when used alone in the Phase II study addressing advanced sarcoma. Following review of preclinical combination studies, clinical data, and discussion with sarcoma experts, we initiated a Phase I dose escalation study of palifosfamide in combination with doxorubicin primarily in patients with soft tissue sarcoma. We reported favorable results and safety profile from this study at ASCO’s 2009 annual meeting. In light of reported favorable Phase II clinical activity data and with the combination being well tolerated in the Phase I trial, we initiated a Phase II randomized controlled trial (“PICASSO”) in the second half of 2008 to compare doxorubicin plus palifosfamide to doxorubicin alone in patients with front- and second-line metastatic or unresectable soft tissue sarcoma. The study generated positive top line interim data in 2009. Upon successfully reaching a pre-specified efficacy milestone and following safety and efficacy data review by the Data Committee, sarcoma experts, and our Medical Advisory Board, we elected to suspend enrollment in the trial in October 2009. We subsequently presented further positive interim data from the trial at the 15 th Annual Connective Tissue Oncology Society meeting held in November 2009 and again at the 2010 ASCO annual meeting in June 2010, where the presentation was also selected for “Best of ASCO.” In July 2010, we announced the initiation of a worldwide registration trial on a protocol design developed through a FDA End of Phase II meeting and the Special Protocol Assessment (SPA) process. Although we did engage in the SPA process, we, with guidance from the FDA, elected to initiate the trial without having obtained SPA agreement from the FDA. The Phase III trial is in front-line metastatic soft tissue sarcoma, entitled PICASSO 3, and is an international, randomized, double-blinded, placebo-controlled trial with a targeted enrollment of 424 patients. The study is designed to evaluate the safety and efficacy of palifosfamide administered with doxorubicin compared with doxorubicin administered with placebo, with no cross-over between the arms. Progression-free survival is the primary endpoint for accelerated approval, with overall survival as the primary endpoint for full approval. Orphan Drug Designation for palifosfamide has been obtained in both the United States and the European Union for the treatment of soft tissue sarcomas. As an orphan designated indication, the patient population available for participation in the PICASSO 3 trial is generally limited. To date, we have experienced slower than anticipated enrollment in the PICASSO 3 trial and have recently taken steps to accelerate patient enrollment and address shortages of doxorubicin, a drug that is necessary for conduct of the trial.

We have also initiated a Phase I trial with palifosfamide in combination with etoposide and carboplatin to determine appropriate safety for initiating a subsequent randomized trial in front-line small-cell lung cancer (“SCLC”). An oral form of palifosfamide has been the subject of preclinical studies necessary for an Investigational New Drug (“IND”) application to support commencing Phase I study. Based on an initial review, FDA has requested, among other things, that we repeat a study in order to support the current protocol, a request under review by the Company. Accordingly, commencement of the study will be delayed pending resolution. We had previously expected that oral palifosfamide would enter Phase I study in the first quarter of 2011.


Jonathan Lewis, M.D., Ph.D.
Age 52 Dr. Lewis is Chief Executive Officer and a director, serving in these capacities since the Company’s September 2005 acquisition of ZIOPHARM, Inc. Dr. Lewis previously served as Chief Executive Officer and a Director of ZIOPHARM, Inc. since January 2004. From July 1994 until June 2001, Dr. Lewis served as Professor of Surgery and Medicine at Memorial Sloan-Kettering Cancer Center. He has been actively involved in leading translational and clinical research in cancer, and is widely recognized by patient advocacy groups. He has received numerous honors and awards in medicine and science, including the ASCO young investigator award, the Yale University Ohse award, and the Royal College of Surgeons Trubshaw Medal. He served as Chief Medical Officer and Chairman of the Medical Board at Antigenics, Inc. from June 2000 until November 2003. He serves as a Director on the Board of POPPA (the Police Organization Providing Peer Assistance) of the New York Police Department (NYPD), the Medical Advisory Board of the Sarcoma Foundation of America and on the Scientific Advisory Council of the Hope Funds for Cancer Research. Other public companies of which Dr. Lewis has formerly served as a director during the past five years include Delcath Systems, Inc. 2005
Our Board believes that Dr. Lewis, along with Mr. Bagley, is an appropriate person to represent management on the Company’s Board of Directors given his position as the Company’s principal executive officer, his tenure with the Company, which dates back to the Company’s inception, and his professional credentials, his standing in the medical community and his clinical research experience.

Richard E. Bagley
Age 67 Mr. Bagley is President, Chief Operating Officer, Chief Financial Officer, Treasurer and a director, serving in these capacities since the Company’s September 2005 acquisition of ZIOPHARM, Inc. Mr. Bagley previously served ZIOPHARM, Inc. as its President and Chief Operating Officer since July 2004, as a Director since December 2004 and as Chief Financial Officer and Treasurer since March 2005. Mr. Bagley initiated a career in pharmaceuticals in 1968 with Smith Kline and French Laboratories, leaving in 1985 after launching Tagamet in the U.S. as Vice President for Product Management and serving as President in the over-the-counter/consumer group. From 1985 – 1990, Mr. Bagley served in several capacities at Squibb Corporation including as President of E. R. Squibb & Sons, U.S. in 1988 and 1989. He subsequently worked in the biotechnology industry as Director, Chief Executive Officer and President of ImmuLogic Pharmaceutical Corporation from 1990 to 1994, as Director, Chief Executive Officer and Chairman of ProScript, Inc. from 1994 to 1998, as Director, President and Chief Executive Officer of AltaRex Corp. from 1998 to May 2003, and thereafter as a part time consultant and senior advisor. 2005
Along with Dr. Lewis, our Board of Directors believes that Mr. Bagley, as President, Chief Operating Officer and Chief Financial Officer, is an appropriate person to represent management on the Company’s Board of Directors given his positions and role within the Company, his tenure with the Company, which dates back to the Company’s inception, and his extensive experience with pharmaceutical development in an executive capacity.

Murray Brennan, M.D.
Age 71 Dr. Brennan, who currently serves as the Board of Directors’ non-executive Lead Director, has been a director of the Company since its September 2005 acquisition of ZIOPHARM, Inc. and previously served as a director of ZIOPHARM, Inc. since December 2004. Dr. Brennan is Emeritus Chairman of Memorial Sloan-Kettering’s Department of Surgery and previously served as Chairman since 1985. Dr. Brennan is the Benno C. Schmidt Chair in Clinical Oncology at the Memorial Sloan Kettering Cancer Center, continues to operate at this institution and currently serves as its Vice President for International Programs. He actively lectures at major institutions throughout the world and has authored or co-authored more than 1000 scientific papers. He previously served as Director of the American Board of Surgery, Chairman of the American College of Surgeons Commission on Cancer, President of the Society of Surgical Oncology, President of the American Surgical Association, President of the Society of Clinical Surgery and Vice President of the American College of Surgeons. Dr. Brennan is a member of the Institute of Medicine of The National Academy of Sciences. He is the recipient of numerous honors, honorary degrees and fellowships for his leadership role in surgery and oncology worldwide. Dr. Brennan serves as a non-executive Director on the Board of QSII (a medical information company) and as a member of its compensation committee. He also serves on the Board of the de Beaumont Foundation, a charitable foundation designed to support public health in the United States and elsewhere. 2005
Dr. Brennan’s credentials and standing in the medical community worldwide, and the oncology community specifically, along with the leadership roles in which he has served at various esteemed organizations, provides experience and credibility that our Board of Directors believes make him well suited to serve on the Board and as its non-executive Lead Director.

James A. Cannon
Age 72 James (Jim) Cannon has been a director of the Company since its September 2005 acquisition of ZIOPHARM, Inc. and previously served as a Director of ZIOPHARM, Inc. since December 2004. Mr. Cannon is Vice Chairman, Chief Financial Officer and a member of the Board of Directors of BBDO Worldwide. In these capacities, he oversees the financial management of BBDO operations in 77 countries. Jim joined BBDO in 1967, was promoted to Chief Financial Officer of the agency in 1984, and was elected to its Board of Directors one year later. An integral member of the team that formed Omnicom via a unique three-agency merger of BBDO, DDB and Needham Harper & Steers, Jim became Comptroller of the new group (NYSE: OMC) and a member of its Board of Directors in 1986, a position he held through 2002. In 1987, he was appointed Director of Financial Operations of the Omnicom Group, serving in this capacity until early 1989 when he rejoined BBDO Worldwide as Executive Vice President and Chief Financial Officer. His return was concurrent with that of Allen Rosenshine who became Chairman and Chief Executive officer of BBDO after heading Omnicom. Jim was promoted to Vice Chairman of the agency in 1990. Jim is a graduate of Pace University and served in the US Marine Corps. 2005
Our Board of Directors believes that Mr. Cannon is qualified to serve as a director of the Company based on his financial skills and overall business judgment. In addition, the role played by Mr. Cannon at BBDO, where he oversees the financial management of that company’s international operations, uniquely qualifies him to serve as Chair of the Company’s audit committee.

Senator Wyche Fowler, Jr., J.D.
Age 70 Senator Wyche Fowler, Jr. has been a director of the Company since its September 2005 acquisition of ZIOPHARM, Inc. and previously served as a Director of ZIOPHARM, Inc. since December 2004. Senator Fowler served for 16 years in the United States Congress. In the U.S. Senate he served as assistant floor leader, helping mold a bipartisan consensus for major public policy issues. Senator Fowler was a member of the U.S. Senate Appropriations, Budget, Energy and Agriculture Committees. First elected to the U.S. House of Representatives, he was a member of the Ways and Means and Foreign Affairs Committees, as well as the Select Committee on Intelligence. President Clinton appointed Senator Fowler U.S. Ambassador to the Kingdom of Saudi Arabia from 1996 through 2001. On his return, the FBI awarded him its highest civilian honor, The Jefferson Cup, for his assistance in combating terrorism and for helping solve terrorism crimes against the U.S. military in Saudi Arabia. He was named Lion of Judah by the State of Israel for successfully freeing Soviet Jew Yakov Gluzman. Senator Fowler is now engaged in an international business and law practice, and also serves as Chairman of the Board of the Middle East Institute, a non-profit foundation in Washington, DC. Senator Fowler also serves on the board of directors of Shubert Theaters, the Shubert Foundation, Brandywine Realty Trust and Keryx Biopharmaceuticals, Inc. 2005
Senator Fowler’s background and experience in the United States Congress, and the leadership qualities exemplified during and since his tenure in Congress, are attributes that the Company believes benefits our overall Board operations. In addition, his international business and law experience qualify him to serve on our Board of Directors.

Randal J. Kirk
Age 57 Randal J. Kirk has been a director of the Company since January 2011. Mr. Kirk is the Senior Managing Director and Chief Executive Officer of Third Security, LLC, an investment management firm founded by Mr. Kirk. Additionally, Mr. Kirk founded and became Chairman of the Board of New River Pharmaceuticals Inc. (previously traded on NASDAQ prior to its acquisition by Shire plc in 2007) in 1996, and was President and Chief Executive Officer between October 2001 and April 2007. Mr. Kirk began his professional career in the private practice of law. Previously, Mr. Kirk served as a member of the Board of Directors of Scios, Inc. (previously traded on NASDAQ prior to its acquisition by Johnson & Johnson) between February 2000 and May 2002, was a member of the board of directors of Howe and Rustling, Inc., a registered investment advisory firm, from December 2001 to October 2006 and was a member of the Board of Directors of Clinical Data, Inc. (previously traded on NASDAQ prior to its acquisition by Forest Laboratories, Inc. in April 2011) from September 2002 to April 2011, and was Chairman of the Board from December 2004 to April 2011. Mr. Kirk currently serves in a number of additional capacities, including as a member of the Board of Directors of Halozyme Therapeutics, Inc. since May 2007; as Chairman of the Board of Directors of Intrexon Corporation since February 2008 and Chief Executive Officer since April 2009; and as Chairman of the Board of Directors of Cyntellect, Inc. since September 2008. Mr. Kirk served on the Board of Visitors of Radford University from July 2003 to June 2009, was Rector of the Board from September 2006 to September 2008, and has served on the Board of Directors of the Radford University Foundation, Inc. since September 1998. He has served on the Board of Visitors of the University of Virginia and Affiliated Schools since July 2009, on the Virginia Advisory Council on Revenue Estimates since July 2006, on the Governor’s Economic Development and Jobs Creation Commission since April 2010, and as a member of the Board of Directors of the Virginia University Research Partnership from July 2007 to November 2010. Mr. Kirk received a B.A. in Business from Radford University and a J.D. from the University of Virginia.


Business Overview

ZIOPHARM Oncology, Inc. is a biopharmaceutical company that is seeking to develop and commercialize a diverse portfolio of in-licensed cancer drugs that can address unmet medical needs. Our principal focus has been on the licensing and development of proprietary small molecule drug candidates that are related to cancer therapeutics already on the market or in development and that can be administered by intravenous (“IV”) and/or oral dosing. We are also pursuing the development of novel DNA-based biotherapeutics in the field of cancer pursuant to a partnering arrangement with Intrexon Corporation. Under the arrangement, we obtained rights to Intrexon’s entire in effector platform for use in the field of oncology, which includes two existing clinical-stage product candidates. We plan to leverage Intrexon’s synthetic biology platform for products to stimulate key pathways used by the body’s immune system to inhibit the growth and metastasis of cancers, adding significantly to our small molecule drug development portfolio utilizing our global capabilities to translate science to the patient. More detailed descriptions of palifosfamide, darinaparsin and indibulin, INXN 3001/1001 and INXN 2001/1001, and our clinical development plans for each, are set forth in this report under the caption “Business — Product Candidates.”

Furthermore, the successful development of our product candidates is highly uncertain. Product development costs and timelines can vary significantly for each product candidate, are difficult to accurately predict, and will require us to obtain additional funding, either alone or in connection with partnering arrangements. Various statutes and regulations also govern or influence the manufacturing, safety, labeling, storage, record keeping and marketing of each product. The lengthy process of seeking approval and the subsequent compliance with applicable statutes and regulations require the expenditure of substantial resources. Any failure by us to obtain, or any delay in obtaining, regulatory approvals could materially, adversely affect our business. To date, we have not received approval for the sale of any product candidates in any market and, therefore, have not generated any revenues from our product candidates.
Financial Overview
Overview of Results of Operations

We have not generated product revenues since our inception. Unless and until we receive approval from the FDA and/or other regulatory authorities for our product candidates, we cannot sell our products and will not have product revenues.
Research and Development Expenses.

Our research and development expense consists primarily of salaries and related expenses for personnel, costs of contract manufacturing services, costs of facilities and equipment, fees paid to professional service providers in conjunction with our clinical trials, fees paid to research organizations in conjunction with pre-clinical animal studies, costs of materials used in research and development, consulting, license and milestone payments and sponsored research fees paid to third parties.

We have not accumulated and tracked our internal historical research and development costs or our personnel and personnel-related costs on a program-by-program basis. Our employee and infrastructure resources are allocated across several projects, and many of our costs are directed to broadly applicable research endeavors. As a result, we cannot state the costs incurred for each of our oncology programs on a program-by-program basis.

In 2010, our clinical projects consisted primarily of a Phase III project for our lead product candidate palifosfamide. This project was initiated during 2010. The expenses incurred by us to third parties were $4.9 million for the year ended December 30, 2010 and $4.9 million for project to date.

Our future research and development expenses in support of our current and future programs will be subject to numerous uncertainties in timing and cost to completion. We test potential products in numerous pre-clinical studies for safety, toxicology and efficacy. We may conduct multiple clinical trials for each product. As we obtain results from trials, we may elect to discontinue or delay clinical trials for certain products in order to focus our resources on more promising products or indications. Completion of clinical trials may take several years or more, and the length of time generally varies substantially according to the type, complexity, novelty and intended use of a product. It is not unusual for pre-clinical and clinical development of each of these types of products to require the expenditure of substantial resources.

We expect that we will need additional financing to support our long-term plans for clinical trials and new product development. We expect to finance our cash needs through the sale of equity securities, strategic collaborations and/or debt financings, or through other sources that may be dilutive to existing stockholders. There can be no assurance that we will be able to obtain funding from any of these sources or, if obtained, what the terms of such funding(s) may be, or that any amount that the Company is able to obtain will be adequate to support the Company’s working capital requirements until it achieves profitable operations. Other than the Intrexon Corporation equity purchase commitment ( See “Recent Financing Transactions — Intrexon Corporation Private Placement and Equity Commitment” below), we have no current committed sources of additional capital. Recently, capital markets have experienced a period of instability that may severely hinder our ability to raise capital within the time periods needed or on terms we consider acceptable, if at all. If we are unable to raise additional funds when needed, we may not be able to continue development and regulatory approval of our products, or we could be required to delay, scale back or eliminate some or all our research and development programs.
Recent Financing Transactions
Intrexon Corporation Private Placement and Equity Commitment

On January 12, 2011, we completed a sale of common stock to Intrexon Corporation pursuant to a Stock Purchase Agreement dated January 6, 2011. Pursuant to the Stock Purchase Agreement, Intrexon purchased 2,426,235 shares of our common stock at a purchase price equal to $4.80 per share. At the same time, we issued to Intrexon 3,636,926 additional shares of our common stock at a purchase price equal to the $0.001 par value of such shares, which price was deemed paid in partial consideration for the execution and delivery of our Exclusive Channel Partner Agreement with Intrexon. The issuance and sale, which was conducted as a private placement transaction, resulted in cash proceeds to us of approximately $11.6 million. We have also agreed to issue additional shares of our common stock to Intrexon upon dosing of the first patient in a ZIOPHARM-conducted Phase II clinical trial in the United States, or similar study as we and Intrexon may agree in a country other than the United States, of a product that is created, produced, developed or identified directly or indirectly by us during the term of the Exclusive Channel Partner Agreement and that, subject to certain exceptions, involves DNA administered to humans for expression of anti-cancer effectors for the purpose of treatment or prophylaxis of cancer. Upon satisfaction of such contingency, we have agreed to issue to Intrexon 3,636,926 additional shares of our common stock for a purchase price equal to the $0.001 par value of such shares, which price will be deemed paid in partial consideration for the execution and delivery of the Exclusive Channel Partner Agreement. Pursuant to a Registration Rights Agreement, we have agreed to file a registration statement with the SEC registering the resale of the shares that we have issued or may issue to Intrexon under the Stock Purchase Agreement.

Under the Stock Purchase Agreement, if requested by the Company and subject to certain restrictions and limitations, Intrexon has agreed to purchase securities in conjunction with future securities offerings conducted by us that constitute “Qualified Financings” and that are conducted while the Exclusive Channel Partner Agreement remains in effect. For this purpose, a “Qualified Financing” means a sale of common stock or equity securities convertible into common stock in a public or private offering, raising gross proceeds of at least $10,000,000, where the sale of shares is either registered under the Securities Act of 1933, as amended, at the time of issuance or we agree to register the resale of such shares. In conjunction with a Qualified Financing, Intrexon has committed to purchase up to 19.99% of the securities issued and sold by us therein (such amount to be calculated exclusive of Intrexon’s purchase). Intrexon will not be obligated to purchase securities in a Qualified Financing unless we are then in substantial compliance with our obligations under the Exclusive Channel Partner Agreement and, with respect to a Qualified Financing that is completed following January 6, 2012, we confirm our intent that 40% of the net offering proceeds (the “Use of Proceeds Commitment Amount”) shall have been spent, or in the next year will be spent, by us under the Exclusive Channel Partner Agreement. In the case of a Qualified Financing that is completed after January 6, 2013, Intrexon’s purchase commitment will be further limited to an amount equal to 50% of the Use of Proceeds Commitment Amount. Intrexon’s aggregate purchase commitment for all future Qualified Financings is capped at $50,000,000. On February 1, 2011, we amended the Stock Purchase Agreement to clarify that if Intrexon voluntarily elects to purchase securities in a Qualified Financing in which we do not request that Intrexon participate, the aggregate purchase price paid by Intrexon for such securities will be applied against and reduce the then remaining maximum amount of Intrexon's $50,000,000 aggregate equity purchase commitment. As a result of Intrexon’s purchase of securities in the February 2011 public offering described below, the remaining maximum amount of Intrexon’s equity purchase commitment is $39.0 million.
February 2011 Public Offering

On February 3, 2011, we entered into an underwriting agreement with Barclays Capital Inc. relating to the issuance and sale of 9,600,000 shares of our common stock. The price to the public in the offering was $5.75 per share, and Barclays Capital, the sole book-running manager for the offering, agreed to purchase the shares from us pursuant to the underwriting agreement at a purchase price of $5.425 per share. Under the terms of the underwriting agreement, we also granted Barclays Capital an option, exercisable for 30 days, to purchase up to an additional 1,440,000 shares of common stock at a purchase price of $5.425 per share. The offering was made pursuant to our effective registration statement on Form S-3 (Registration Statement No. 333-166444) previously filed with the Securities and Exchange Commission, and a prospectus supplement thereunder. The transactions contemplated by the underwriting agreement were completed on February 8, 2011. In connection with the closing, Barclays Capital purchased the 9,600,000 firm shares contemplated by the underwriting agreement and exercised in full its option to purchase an additional 1,440,000 shares, resulting in our issuing a total of 11,040,000 shares at the closing. The net proceeds from the offering were approximately $59.4 million after deducting underwriting discounts and estimated offering expenses.

Critical Accounting Policies and Significant Estimates

Our management's discussion and analysis of our financial condition and results of operations is based upon our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported expenses during the reporting periods. We evaluate our estimates and judgments on an ongoing basis. Actual results may differ materially from these estimates under different assumptions or conditions.

Clinical Trial Expenses

Clinical trial expenses include expenses associated with Clinical Research Organizations (“CRO”). The invoicing from CROs for services rendered can lag several months. We accrue the cost of services rendered in connection with CRO activities based on our estimate of site management, monitoring costs, and project management costs. We maintain regular communication with our CROs to gauge the reasonableness of our estimates. Differences between actual clinical trial expenses and estimated clinical trial expenses recorded have not been material and are adjusted for in the period in which they become known.
Fair Value Measurements

We have warrant liabilities that are measured using fair value. Accounting standards define fair value, establish a framework for measuring fair value under generally accepted accounting principles and enhance disclosures about fair value measurements. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The standard describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value which are the following:
• Level 1 — Quoted prices in active markets for identical assets or liabilities.
• Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
• Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
Stock-Based Compensation and Warrants

We make certain assumptions in order to value and expense our share-based compensation awards. In connection with valuing stock options and warrants we use the Black-Scholes model, which requires us to estimate certain subjective assumptions. The key assumptions we make are: the expected volatility of our stock; the expected term of the award; and the expected forfeiture rate. In connection with our restricted stock programs, we make assumptions principally related to the forfeiture rate.

We review our valuation assumptions periodically and, as a result, we may change our valuation assumptions used to value share-based awards granted in future periods. Such changes may lead to a significant change in the expense we recognize in connection with share-based payments.
Income Taxes

In preparing our financial statements, we estimate our income tax liability in each of the jurisdictions in which we operate by estimating our actual current tax expense together with assessing temporary differences resulting from differing treatment of items for tax and financial reporting purposes. These differences result in deferred tax assets and liabilities, which are included in our balance sheets. Significant management judgment is required in assessing the realizability of our deferred tax assets. In performing this assessment, we consider whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. In making this determination, under the applicable financial accounting standards, we are allowed to consider the scheduled reversal of deferred tax liabilities, projected future taxable income, and the effects of tax planning strategies. Our estimates of future taxable income include, among other items, our estimates of future income tax deductions related to the exercise of stock options. In the event that actual results differ from our estimates, we adjust our estimates in future periods and we may need to establish a valuation allowance, which could materially impact our financial position and results of operations.

We account for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving uncertain tax positions. The evaluation of uncertain tax positions is based on factors that include, but are not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position. We evaluate uncertain tax positions on an annual basis and adjust the level of the liability to reflect any subsequent changes in the relevant facts surrounding the uncertain positions. Our liabilities for uncertain tax positions can be relieved only if the contingency becomes legally extinguished through either payment to the taxing authority or the expiration of the statute of limitations, the recognition of the benefits associated with the position meet the “more-likely-than-not” threshold or the liability becomes effectively settled through the examination process. We consider matters to be effectively settled once the taxing authority has completed all of its required or expected examination procedures, including all appeals and administrative reviews; we have no plans to appeal or litigate any aspect of the tax position; and we believe that it is highly unlikely that the taxing authority would examine or re-examine the related tax position. We also accrue for potential interest and penalties, related to unrecognized tax benefits in income tax expense.
Recent Accounting Pronouncements

In January 2010, the FASB issued Accounting Standards Update (“ASU”) No. 2010-06 Fair Value Measurements and Disclosures (Topic 820) which improves disclosures about fair value measurements. More specifically, ASU 2010-06 updates Topic 820-10 to require disclosure of transfers in and out of levels 1 and 2 and the reason for the transfers. Additionally, it requires separate reporting of purchases, sales, issuances and settlements for level 3. This update is effective for periods beginning after December 15, 2009. The adoption of this standard did not have an impact on our financial position or results of operations.

In April 2009, the United States Securities and Exchange Commission (“SEC”) issued Final Rule No. 33-9002, Interactive Data to Improve Financial Reporting , which requires companies to submit financial statements in XBRL (extensible business reporting language) format with their SEC filings. The Company will be required to provide interactive data reports starting with their first quarterly report for fiscal periods ending on or after June 15, 2011. The adoption of this standard will not have an impact on our financial position or results of operations.

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