AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 17, 2000 REGISTRATION NO. 333-48366 ================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------------ AMENDMENT NO. 1 TO FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ------------------ TRIANGLE PHARMACEUTICALS, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 56-1930728 (State or Other Jurisdiction of (I.R.S. Employer Incorporation or Organization) Identification No.) ------------------ 4 UNIVERSITY PLACE 4611 UNIVERSITY DRIVE DURHAM, NORTH CAROLINA, 27707 (919) 493-5980 (Address, Including Zip Code, And Telephone Number, Including Area Code, Of Registrant's Principal Executive Offices) ------------------ DAVID W. BARRY, M.D. CHAIRMAN AND CHIEF EXECUTIVE OFFICER TRIANGLE PHARMACEUTICALS, INC. 4 UNIVERSITY PLACE 4611 UNIVERSITY DRIVE DURHAM, NORTH CAROLINA 27707 (919) 493-5980 (Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent For Service) ------------------ COPIES TO: Luci Staller Altman, Esq. Ellen B. Corenswet, Esq. BROBECK, PHLEGER & HARRISON LLP 1633 Broadway, 47th Floor New York, NY 10019 (212) 581-1600 ------------------ Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement. If only the securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: / / If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: /X/ If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering: / / If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering: / / If delivery of the prospectus is expected to be made pursuant to Rule 434, please check the following box: / / CALCULATION OF REGISTRATION FEE PROPOSED MAXIMUM AGGREGATE TITLE OF SHARES TO BE REGISTERED OFFERING PRICE(1) AMOUNT OF REGISTRATION FEE(2) -------------------------------- -------------------------- ----------------------------- Common Stock, $.001 par value................................ $24,000,000 $6,336 (1) Estimated solely for the purpose of computing the amount of the registration fee in accordance with Rule 457(o) under the Securities Act of 1933. (2) $26,400 has been paid previously. THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE SEC, ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE. ================================================================================ SUBJECT TO COMPLETION, DATED NOVEMBER 17, 2000. The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities in any state where the offer or sale is not permitted. PRELIMINARY PROSPECTUS TRIANGLE PHARMACEUTICALS, INC. $24,000,000 AGGREGATE AMOUNT OF COMMON STOCK We have engaged Ramius Securities, LLC as the Underwriter for this offering. The Underwriter has agreed to sell, on a best efforts basis, up to $100 million of our common stock during 15-trading day selling periods which we select. The Underwriter may sell our common stock at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices, but not below a floor price set by us for each selling period. If the Underwriter does not sell the requisite number of shares of our common stock during a given selling period, then under the terms of the purchase agreement, Ramius Capital Group, LLC, the Investor, is obligated to purchase from us the remaining number of shares of our common stock so long as certain share price and volume limitations are met. The Underwriter may also purchase from us up to an additional 10% of the amount of common stock we request to sell during a 15-trading day selling period to cover over-allotments. See "Plan of Distribution" commencing on page 16 for a discussion of the underwriting agreement and purchase agreement. Pursuant to Rule 415 of the Securities Act of 1933, as amended, we are initially registering $24 million as an aggregate amount of our common stock for issuance and sale pursuant to the underwriting agreement and purchase agreement. We intend to file additional registration statements or post-effective amendments to this registration statement, as needed, for the sale of additional shares of common stock under the underwriting agreement and purchase agreement. See "Plan of Distribution." You should read this document and any prospectus supplement or amendment carefully before you invest. Our common stock is traded on the Nasdaq National Market under the symbol "VIRS." On November 16, 2000, the last reported sale price for our common stock was $6.625 per share. ------------------ THE COMMON STOCK OFFERED INVOLVES A HIGH DEGREE OF RISK. SEE "RISK FACTORS" COMMENCING ON PAGE 2 FOR A DISCUSSION OF SOME IMPORTANT RISKS YOU SHOULD CONSIDER BEFORE BUYING ANY SHARES OF COMMON STOCK. ------------------ NEITHER THE SECURITIES AND EXCHANGE COMMISSION, SEC, NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED THESE SECURITIES, OR PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. ------------------ Ramius Securities, LLC The date of this prospectus is _______ , 2000 TABLE OF CONTENTS PAGE WHERE YOU CAN FIND MORE INFORMATION............................................1 INFORMATION INCORPORATED BY REFERENCE..........................................1 OUR BUSINESS...................................................................2 RISK FACTORS...................................................................2 FORWARD-LOOKING STATEMENTS....................................................15 USE OF PROCEEDS...............................................................15 PLAN OF DISTRIBUTION..........................................................16 LEGAL MATTERS.................................................................21 EXPERTS.......................................................................21 You should rely only on the information contained in this document or to which we have referred you. We have not authorized anyone to provide you with information that is different. This document may only be used where it is legal to sell these securities. The information contained in this document may only be accurate on the date of this document. This prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, in any state where the offer or sale is prohibited. Neither the delivery of this prospectus, nor any sale made under this prospectus shall, under any circumstances, imply that the information in this prospectus is correct as of any date after the date of this prospectus. WHERE YOU CAN FIND MORE INFORMATION We file reports, proxy statements and other information with the SEC. You may read and copy any document we file at the SEC's public reference rooms in Washington, D.C., New York, New York and Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further information on the public reference rooms. Our SEC filings are also available to the public on the SEC's website at http://www.sec.gov. INFORMATION INCORPORATED BY REFERENCE The SEC allows us to "incorporate by reference" the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus, and later information filed with the SEC will update and supersede this information. We incorporate by reference the documents listed below and any future filings we make with the SEC under Section 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934 until our offering is completed. 1. Our Annual Report on Form 10-K for the fiscal year ended December 31, 1999 (file no. 000-21589), including certain information in our Definitive Proxy Statement in connection with our 2000 Annual Meeting of Stockholders; 2. Our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2000 (file no. 000-21589); 3. Our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2000 (file no. 000-21589); 4. Our Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2000 (file no. 000-21589); 5. Our Report on Form 8-K filed on November 3, 2000 (file no. 000-21589); and 6. The description of our common stock contained in our Registration Statements on Form 8-A filed October 18, 1996, February 10, 1999, and June 18, 1999 (file no. 000-21589). The reports and other documents that we file after the date of this prospectus will update and supersede the information in this prospectus. You may request a copy of these filings, at no cost, by writing or telephoning us at: Triangle Pharmaceuticals, Inc., 4 University Place 4611 University Drive Durham, North Carolina, 27707 (919) 493-5980 Attn: General Counsel. We have received U.S. trademark registrations for our corporate name and logo, Coactinon(R) and Coviracil(R). This prospectus also includes names and trademarks of other companies. 1 OUR BUSINESS We develop new drug candidates primarily in the antiviral area, with a particular focus on therapies for HIV, including AIDS, and the hepatitis B and C viruses. We have an existing portfolio of five licensed drug candidates and several drug candidates for which we have an option to acquire a license. Members of our senior management, prior to joining Triangle, played instrumental roles in developing and commercializing several leading antiviral therapies. Our goal is to capitalize on our management team's expertise, as well as on advances in virology and immunology, to identify, develop and commercialize new drug candidates that can be used alone or in combination to coactively treat serious diseases. Triangle was incorporated in Delaware in July 1995. Our principal executive offices are located at 4 University Place, 4611 University Drive, Durham, North Carolina 27707, and our telephone number is (919) 493-5980. RISK FACTORS IN ADDITION TO THE OTHER INFORMATION IN THIS PROSPECTUS, YOU SHOULD CAREFULLY CONSIDER THE FOLLOWING RISKS AND UNCERTAINTIES BEFORE DECIDING TO PURCHASE SHARES OF OUR COMMON STOCK. AN INVESTMENT IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. ALL OF OUR PRODUCT CANDIDATES ARE IN DEVELOPMENT AND MAY NEVER BE SUCCESSFULLY COMMERCIALIZED WHICH WOULD HAVE AN ADVERSE IMPACT ON YOUR INVESTMENT AND OUR BUSINESS. Some of our drug candidates are at an early stage of development and all of our drug candidates will require expensive and lengthy testing and regulatory clearances. None of our drug candidates has been approved by regulatory authorities. We do not expect any of our drug candidates to be commercially available until at least the year 2002. There are many reasons that we may fail in our efforts to develop our drug candidates, including that: - our drug candidates will be ineffective, toxic or will not receive regulatory clearances, - our drug candidates will be too expensive to manufacture or market or will not achieve broad market acceptance, - third parties will hold proprietary rights that may preclude us from developing or marketing our drug candidates, or - third parties will market equivalent or superior products. The success of our business depends upon our ability to successfully develop and market our drug candidates. WE HAVE INCURRED LOSSES SINCE INCEPTION AND MAY NEVER ACHIEVE PROFITABILITY. We formed Triangle in July 1995 and we have only a limited operating history for you to review in evaluating our business. We have incurred losses since our inception. At September 30, 2000, our accumulated deficit was $305.6 million. Our historical costs relate primarily to the acquisition and development of our drug candidates and selling, general and administrative costs. We have not generated any revenue from the sale of our drug candidates to date, and do not expect to do so until at least the year 2002. In addition, we expect annual losses to increase over the next several years as a result of our drug development and commercialization efforts. To become profitable, we must successfully develop and obtain regulatory approval for our drug candidates and effectively manufacture, market and sell any products we develop. We may never generate significant revenue or achieve profitable operations. 2 IF WE NEED ADDITIONAL FUNDS AND ARE UNABLE TO RAISE THEM, WE WILL HAVE TO CURTAIL OR CEASE OPERATIONS. Our drug development programs and potential commercialization of our drug candidates require substantial working capital, including expenses for preclinical testing, chemical synthetic scale-up, manufacture of drug substance for clinical trials, toxicology studies, clinical trials of drug candidates, sales and marketing expenses, payments to our licensors and potential commercial launch of our drug candidates. Our future working capital needs will depend on many factors, including: - the progress and magnitude of our drug development programs, - the scope and results of preclinical testing and clinical trials, - the cost, timing and outcome of regulatory reviews, - the costs under current and future license and option agreements for our drug candidates, including the costs of obtaining patent protection for our drug candidates, - the costs of acquiring any additional drug candidates, - the rate of technological advances, - the commercial potential of our drug candidates, - the magnitude of our administrative and legal expenses, - the costs of establishing sales and marketing functions, and - the costs of establishing third party arrangements for manufacturing. We have incurred negative cash flow from operations since we incorporated Triangle and do not expect to generate positive cash flow from our operations for at least the next several years. Although the strategic alliance with Abbott Laboratories, the Abbott Alliance, provided us with significant additional funding, we cannot assure you that such funding, combined with other available sources of funds, will be sufficient to meet our future needs. In addition, we cannot assure you that we will receive the contingent future research funding payments under the Abbott Alliance. Therefore, we may need additional future financings to fund our operations. We may not be able to obtain adequate financing to fund our operations, and any additional financing we obtain may be on terms that are not favorable to us. In addition, any future financings could substantially dilute our stockholders. If adequate funds are not available, we will be required to delay, reduce or eliminate one or more of our drug development programs, to enter into new collaborative arrangements or to modify the Abbott Alliance on terms that are not favorable to us. These collaborative arrangements or modifications could result in the transfer to third parties of rights that we consider valuable. In addition, we often consider the acquisition of technologies and drug candidates that would increase our working capital requirements. To facilitate our ability to raise additional equity capital, on November 1, 2000, we entered into the Facility, described below under "Plan of Distribution," pursuant to which we may be able to issue and sell up to $100 million of our common stock over the next three years. There are conditions and limitations on the obligations of Ramius Securities, LLC, the Underwriter, and Ramius Capital Group, LLC, the Investor, with respect to the issuance and sale of our common stock. In particular, the Underwriter's and Investor's obligations are subject to certain share price and trading volume limitations which could curtail the number of shares of common stock they are obligated to sell or purchase, as the case may be, regardless of the number of shares of common stock we request to be sold. In some circumstances, such as an average trading price of less than $4.00 per share, they will have no obligation to sell or purchase our common stock, even if we request them to do so. In addition, we may elect not to sell shares of common stock if we believe that market conditions are unfavorable. 3 BECAUSE OUR PRODUCT CANDIDATES MAY NOT SUCCESSFULLY COMPLETE CLINICAL TRIALS REQUIRED FOR COMMERCIALIZATION, OUR BUSINESS MAY NEVER ACHIEVE PROFITABILITY. To obtain regulatory approvals needed for the sale of our drug candidates, we must demonstrate through preclinical testing and clinical trials that each drug candidate is safe and effective. The clinical trial process is complex and uncertain and the regulatory environment varies widely from country to country. Positive results from preclinical testing and early clinical trials do not ensure positive results in pivotal clinical trials. Many companies in our industry have suffered significant setbacks in pivotal clinical trials, even after promising results in earlier trials. Any of our drug candidates may produce undesirable side effects in humans. These side effects could cause us or regulatory authorities to interrupt, delay or halt clinical trials of a drug candidate, as occurred with mozenavir dimesylate, or could result in regulatory authorities refusing to approve the drug candidate for any and all targeted indications. In April 2000, the Food and Drug Administration, FDA, issued a clinical hold on, and the South African Medicines Control Council, MCC, terminated, clinical study FTC-302 for our drug candidate Coviracil, formerly known as FTC. Study FTC-302 was being conducted under a U.S. Investigational New Drug Application, IND, at sites in South Africa. The FDA indicated that study FTC-302 may not be adequate to provide pivotal data in support of a New Drug Application, NDA. Discussions with the FDA and MCC on this issue are continuing. Due to these circumstances, the planned submission of a U.S. NDA for Coviracil may be significantly delayed. We, the FDA, or foreign regulatory authorities may suspend or terminate clinical trials at any time if we or they believe the trial participants face unacceptable health risks. Clinical trials may not demonstrate that our drug candidates are safe or effective. Clinical trials are lengthy and expensive. They require adequate supplies of drug substance and sufficient patient enrollment. Patient enrollment is a function of many factors, including: - the size of the patient population, - the nature of the protocol, - the proximity of patients to clinical sites, and - the eligibility criteria for the clinical trial. Delays in patient enrollment can result in increased costs and longer development times. Even if we successfully complete clinical trials, we may not be able to file any required regulatory submissions in a timely manner and we may not receive regulatory approval for the drug candidate. In addition, if the FDA or foreign regulatory authorities require additional clinical trials, we could face increased costs and significant development delays, as occurred with Coactinon and which may occur with Coviracil. In December 1999, we were advised by the FDA that additional Phase III studies would be required to support an NDA submission for Coactinon. In August 2000, we announced our decision to continue the development of Coactinon. Based upon discussions with the FDA and an analysis of clinical data from two clinical studies, we began enrolling an additional 280 patients in an ongoing Phase III clinical study in an effort to generate clinical results that would help support an NDA submission for Coactinon. Changes in regulatory policy or additional regulations adopted during product development and regulatory review of information we submit could also result in delays or rejections. The FDA has notified us that two of our drug candidates, Coviracil and DAPD for the treatment of HIV, qualify for designation as "fast track" products under provisions of the Food and Drug Administration Modernization Act of 1997. The fast track provisions are designed to expedite the review of new drugs intended to treat serious or life-threatening conditions and essentially codified the criteria previously established by the FDA for accelerated approval. These drug candidates may not, however, continue to qualify for expedited review and our other drug candidates may fail to qualify for fast track development or expedited review. Even though some of our drug candidates have qualified for expedited review, the FDA may not approve them at all or any sooner than other drug candidates that do not qualify for expedited review. 4 IF WE OR OUR LICENSORS ARE NOT ABLE TO OBTAIN AND MAINTAIN ADEQUATE PATENT PROTECTION FOR OUR PRODUCT CANDIDATES, WE MAY BE UNABLE TO COMMERCIALIZE OUR PRODUCT CANDIDATES OR TO PREVENT OTHER COMPANIES FROM USING OUR TECHNOLOGY IN COMPETITIVE PRODUCTS. Our success will depend on our ability and the ability of our licensors to obtain and maintain patents and proprietary rights for our drug candidates and to avoid infringing the proprietary rights of others, both in the United States and in foreign countries. We have no patents in our own name and we have a small number of patent applications of our own pending. One of our patent applications is a joint application with co-inventors from another institution. We have, however, licensed or we have an option to license patents, patent applications and other proprietary rights from third parties for each of our drug candidates. If we breach our licenses, we may lose rights to important technology and drug candidates. Our patent position, like that of many pharmaceutical companies, is uncertain and involves complex legal and factual questions for which important legal principles are unresolved. We may not develop or obtain rights to products or processes that are patentable. Even if we do obtain patents, they may not adequately protect the technology we own or have in-licensed. In addition, others may challenge, seek to invalidate, infringe or circumvent any patents we own or in-license, and rights we receive under those patents may not provide competitive advantages to us. Further, the manufacture, use or sale of our products or processes may infringe the patent rights of others. Several pharmaceutical and biotechnology companies, universities and research institutions have filed patent applications or received patents that cover our technologies or technologies similar to ours. Others have filed patent applications and received patents that conflict with patents or patent applications we own or have in-licensed, either by claiming the same methods or compounds or by claiming methods or compounds that could dominate those owned by or licensed to us. In addition, we may not be aware of all patents or patent applications that may impact our ability to make, use or sell any of our drug candidates. For example, United States patent applications are confidential while pending in the Patent and Trademark Office, PTO, and patent applications filed in foreign countries are often first published six months or more after filing. Any conflicts resulting from third party patent applications and patents could significantly reduce the coverage of our patents and limit our ability to obtain meaningful patent protection. If other companies obtain patents with conflicting claims, we may be required to obtain licenses to these patents or to develop or obtain alternative technology. We may not be able to obtain any such license on acceptable terms or at all. Any failure to obtain such licenses could delay or prevent us from pursuing the development or commercialization of our drug candidates, which would adversely affect our business. There are significant risks regarding the patent rights of two of our in-licensed drug candidates. We may not be able to commercialize Coviracil or DAPD due to patent rights held by third parties other than our licensors. Third parties have filed numerous patent applications and have received numerous issued patents in the United States and many foreign countries that relate to these drug candidates and their use alone or coactively to treat HIV and hepatitis B. As a result, our patent position regarding the use of Coviracil and DAPD to treat HIV and/or hepatitis B is highly uncertain and involves numerous complex legal and factual questions that are unknown or unresolved. If any of these questions is resolved in a manner that is not favorable to us, we would not have the right to commercialize Coviracil and/or DAPD in the absence of a license from one or more third parties, which may not be available on acceptable terms or at all. In addition, even if any of these questions is favorably resolved, we may still attempt to obtain licenses from one or more third parties to reduce or eliminate the risks relating to some or all of these matters. Such licenses may not be available on acceptable terms or at all. Our inability to commercialize either of these drug candidates could adversely affect our business. COVIRACIL (EMTRICITABINE) Coviracil, a purified form of FTC, belongs to the same general class of nucleosides as lamivudine, also known as 3TC. In the United States, the FDA has approved 3TC for the treatment of hepatitis B and for use in combination with zidovudine, also known as AZT, for the treatment of HIV. Regulatory authorities have approved 3TC for the treatment of hepatitis B and for use in combination with other nucleoside analogues for the treatment of HIV in a number of other countries. Glaxo Wellcome plc, Glaxo, currently sells 3TC for the treatment of HIV and hepatitis B under a license agreement with BioChem Pharma Inc., BioChem Pharma. We obtained rights to Coviracil under a license from Emory University, Emory. In 1990 and 1991, Emory filed in the United States and thereafter in numerous foreign countries patent applications with claims to compositions of matter and methods to 5 treat HIV and hepatitis B with Coviracil. In 1991, Yale University, Yale, filed in the United States patent applications on FTC, including Coviracil and its use to treat hepatitis B, and subsequently licensed its rights under those patent applications to Emory. Our license arrangement with Emory includes all rights to Coviracil and its uses claimed in the Yale patent applications. HIV. Emory received a United States patent in 1993 covering a method to treat HIV with Coviracil. Emory has also received United States and European patents containing composition of matter claims that cover Coviracil. BioChem Pharma filed a patent application in the United States in 1989 and received a patent in 1991 covering a group of nucleosides in the same general class as Coviracil, but which did not include Coviracil. BioChem Pharma filed foreign patent applications in 1990, which expanded upon its 1989 United States patent application to include FTC among a large class of nucleosides. The foreign patent applications are pending in many countries and have issued in a number of countries with claims directed to FTC that may cover Coviracil and its use to treat HIV. In addition, BioChem Pharma filed a United States patent application in 1991 specifically directed to Coviracil. BioChem Pharma has received two patents in the United States based on this patent application, one directed to Coviracil and the other directed to a method for treating viral diseases with Coviracil. The PTO has determined that there are conflicts between both BioChem Pharma patents and patent applications filed by Emory because they have overlapping claims to the same technology. The PTO is conducting two adversarial proceedings, interferences, to determine whether BioChem Pharma or Emory is entitled to the patent claims in dispute regarding BioChem Pharma's two issued patents. Emory may not prevail in the adversarial proceedings, and the proceedings may also delay the decision of the PTO regarding Emory's patent application. BioChem Pharma also filed patent applications in many foreign countries based upon its 1991 United States patent application and has received patents in certain countries. BioChem Pharma may have additional patent applications pending in the United States. In the United States, the first to invent a technology is entitled to patent protection on that technology. For patent applications filed prior to January 1, 1996, United States patent law provides that a party who invented a technology outside the United States is deemed to have invented the technology on the earlier of the date it introduced the invention in the United States or the date it filed its patent application. In a filing with the SEC, BioChem Pharma stated that prior to January 1, 1996, it conducted substantially all of its research activities outside the United States. BioChem Pharma also stated that it considered this to be a disadvantage in obtaining United States patents based on patent applications filed before January 1, 1996 as compared to companies that mainly conducted research in the United States. We do not know whether Emory or BioChem Pharma was the first to invent the technology claimed in their respective United States patent applications or patents. We also do not know whether BioChem Pharma invented the technology disclosed in its patent applications in the United States or introduced that technology in the United States before the date of its patent applications. In foreign countries, the first party to file a patent application on a technology, not the first to invent the technology, is entitled to patent protection on that technology. We believe that Emory filed patent applications disclosing Coviracil as a useful anti-HIV agent in many foreign countries before BioChem Pharma filed its foreign patent applications on that technology. However, BioChem Pharma has received patents in several foreign countries. In addition, BioChem Pharma has filed patent applications on Coviracil and its uses in certain countries in which Emory did not file patent applications. Emory has opposed or otherwise challenged patent claims on Coviracil granted to BioChem Pharma in Australia and Europe. Emory may not initiate patent opposition proceedings in any other countries or be successful in any foreign proceeding attempting to prevent the issuance of, revoke or limit the scope of patents issued to BioChem Pharma. BioChem Pharma has opposed patent claims on Coviracil granted to Emory in Europe, Japan, Australia and South Korea. BioChem Pharma may make additional challenges to Emory patents or patent applications, which Emory may not succeed in defending. Our sales, if any, of Coviracil for the treatment of HIV may be held to infringe United States and foreign patent rights of BioChem Pharma. Under the patent laws of most countries, a product can be found to infringe a third party patent either if the third party patent expressly covers the product or method of treatment using the product, or if the third party patent covers subject matter that is substantially equivalent in nature to the product or method, even if the patent does not expressly cover the product or method. If it is determined that the sale of Coviracil for the treatment of HIV infringes a BioChem Pharma patent, we would not have the right to make, use or sell Coviracil for the treatment of HIV in one or more countries in the absence of a license from BioChem Pharma. We may be unable to obtain such a license from BioChem Pharma on acceptable terms or at all. 6 HEPATITIS B. Burroughs Wellcome Co, Burroughs Wellcome, filed patent applications in March 1991 and May 1991 in Great Britain on a method to treat hepatitis B with FTC and purified forms of FTC, that include Coviracil. Burroughs Wellcome filed similar patent applications in other countries, including the United States. Glaxo subsequently acquired Burroughs Wellcome's rights under those patent applications. Those patent applications were filed in foreign countries prior to the date Emory filed its patent application on the use of Coviracil to treat hepatitis B. Burroughs Wellcome's foreign patent applications, therefore, have priority over those filed by Emory. In July 1996, Emory instituted litigation against Glaxo in the United States District Court to obtain ownership of the patent applications filed by Burroughs Wellcome, alleging that Burroughs Wellcome converted and misappropriated Emory's invention and property and that an Emory employee is the inventor or a co-inventor of the subject matter covered by the Burroughs Wellcome patent applications. In May 1999, Emory and Glaxo settled the litigation, and we became the exclusive licensee of the United States and all foreign patent applications and patents filed by Burroughs Wellcome on the use of Coviracil to treat hepatitis B. Under the license and settlement agreements, Emory and we were also given access to development and clinical data and drug substance held by Glaxo relating to Coviracil. BioChem Pharma filed a patent application in May 1991 in Great Britain also directed to a method to treat hepatitis B with FTC. BioChem Pharma filed similar patent applications in other countries. In January 1996, BioChem Pharma received a patent in the United States, which included a claim to treat hepatitis B with Coviracil. The PTO has determined that there is a conflict between the BioChem Pharma patent and patent applications filed by Yale and Emory. The PTO is conducting an adversarial proceeding, an interference, to determine which party is entitled to the patent claims in dispute. Yale licensed all of its rights relating to FTC, including Coviracil, and its uses claimed in this patent application to Emory, which subsequently licensed these rights to us. Neither Emory nor Yale may prevail in the adversarial proceeding, and the proceeding may delay the decision of the PTO regarding Yale's and Emory's patent applications. In addition, the PTO has recently added the U.S. patent application filed by Burroughs Wellcome to this interference. Emory may not pursue or succeed in any such proceedings. We will not be able to sell Coviracil for the treatment of hepatitis B in the United States unless a United States court or administrative body determines that the BioChem Pharma patent is invalid or unless we obtain a license from BioChem Pharma. We may be unable to obtain such a license on acceptable terms or at all. In July 1991, BioChem Pharma received a United States patent on the use of 3TC to treat hepatitis B and has corresponding patent applications pending or issued in foreign countries. If it is determined that the use of Coviracil to treat hepatitis B is not substantially different from the use of 3TC to treat hepatitis B, a court could hold that the use of Coviracil to treat hepatitis B infringes these BioChem Pharma 3TC patents. In addition, BioChem Pharma has filed in the United States and foreign countries several patent applications on manufacturing methods relating to a class of nucleosides that includes Coviracil, from which BioChem Pharma has received several patents in the United States and many foreign countries. If we use a manufacturing method that is covered by patents issued on any of these applications, we will not be able to manufacture Coviracil without a license from BioChem Pharma. We may not be able to obtain such a license on acceptable terms or at all. DAPD We obtained our rights to DAPD under a license from Emory and the University of Georgia Research Foundation, Inc., University of Georgia. Our rights to DAPD include a number of issued United States patents that cover composition of matter, a method for the synthesis of DAPD, methods for the use of DAPD alone or in combination with certain other agents for the treatment of hepatitis B, and a method to treat HIV with DAPD. We also have rights to several foreign patents and patent applications that cover methods for the use of DAPD alone or in combination with certain other anti-hepatitis B agents for the treatment of hepatitis B. Additional foreign patent applications are pending which contain claims for the use of DAPD to treat HIV. Emory and the University of Georgia filed patent applications claiming these inventions in the United States in 1990 and 1992. BioChem Pharma filed a patent application in the United States in 1988 on a group of nucleosides in the same general class as DAPD and their use to treat HIV, and has filed corresponding patent applications in foreign countries. The PTO issued a patent to BioChem Pharma in 1993 covering a class of nucleosides that includes DAPD and its use to treat HIV. Corresponding patents have been issued to BioChem Pharma in many foreign countries. Emory has filed an opposition to patent claims granted to BioChem Pharma by the European Patent Office based, in part, upon Emory's assertion that BioChem Pharma's patent does not disclose how to make DAPD. In a patent opposition hearing held 7 at the European Patent Office on March 4, 1999, the Opposition Division ruled that the BioChem Pharma European patent covering DAPD is valid. Emory has appealed this decision to the European Patent Office Technical Board of Appeal. If the Technical Board of Appeal affirms the decision of the Opposition Division, or if Emory or Triangle does not pursue the appeal, we would not be able to sell DAPD in Europe without a license from BioChem Pharma, which may not be available on acceptable terms or at all. Patent claims granted to Emory on both DAPD (the administered drug) and DXG (the parent drug into which DAPD is converted in the body) have also been opposed by BioChem Pharma in the Australian Patent Office. In a decision dated November 8, 2000, the Australian Patent Office held that Emory's patent claims directed to DAPD are not patentable over an earlier BioChem Pharma patent. If Emory, the University of Georgia or Triangle does not appeal this decision of the Australian Patent Office, or is unsuccessful in the appeal, then we will not be able to sell DAPD in Australia without a license from BioChem Pharma, which may not be available on reasonable terms or at all. BioChem Pharma's opposition to Emory's patent claims on DXG in Australia is ongoing. If Emory, the University of Georgia and we do not challenge, or are not successful in any challenge to, BioChem Pharma's issued patents, pending patent applications, or patents that may issue from such applications, we will not be able to manufacture, use or sell DAPD in the United States and any foreign countries in which BioChem Pharma receives a patent without a license from BioChem Pharma. We may not be able to obtain such a license from BioChem Pharma on acceptable terms or at all. IMMUNOSTIMULATORY SEQUENCE PRODUCT CANDIDATES In March 2000, we entered into a licensing and collaborative agreement with Dynavax Technologies Corporation, Dynavax, to develop immunostimulatory polynucleotide sequence product candidates for the prevention and/or treatment of serious viral diseases, which became effective in April 2000. Immunostimulatory sequences are polynucleotides which stimulate the immune system, and could potentially be used in combination with our small molecule product candidates to increase the body's ability to defend against viral infection. Immunostimulatory sequences can be stabilized for use through internal linkages that do not occur in nature, including phosphorothioate linkages. There are a number of companies which have patent applications and issued patents, both in the United States and in other countries, that cover immunostimulatory sequences and their uses. Coley Pharmaceuticals, Inc. has filed several patent applications in this area and has in addition exclusively licensed a number of patent applications on this subject from the University of Iowa and Isis Pharmaceuticals, Inc. A number of these patent applications have been issued. A number of companies have also filed patent applications and have or are expected to receive patents on certain polynucleotides and methods for their use and manufacture. We could be prevented from making, using or selling any immunostimulatory sequence that is covered by a patent issued to a third party company, unless we obtain a license from that company, which may not be available on reasonable terms or at all. With respect to any of our drug candidates, litigation, patent opposition and adversarial proceedings, including the currently pending proceedings, could result in substantial costs to us. We expect the costs of the currently pending proceedings to increase significantly during the next several years. We anticipate that additional litigation and/or proceedings will be necessary or may be initiated to enforce any patents we own or in-license, or to determine the scope, validity and enforceability of other parties' proprietary rights and the priority of an invention. Any of these activities could result in substantial costs and/or delays to us. The outcome of any of these proceedings may significantly affect our drug candidates and technology. United States patents carry a presumption of validity and generally can be invalidated only through clear and convincing evidence. As indicated above, the PTO is conducting three adversarial proceedings in connection with the emtricitabine technology. We cannot assure you that a court or administrative body would hold our in-licensed patents valid or would find an alleged infringer to be infringing. Further, the license and option agreements with Emory, the University of Georgia, The Regents of the University of California, The DuPont Pharmaceuticals Company, Mitsubishi Chemical Corporation, and Dynavax provide that each of these licensors is primarily responsible for any patent prosecution activities, such as litigation, patent conflict proceeding, patent opposition or other actions, for the technology licensed to us. These agreements also provide that in general we are required to reimburse these licensors for the costs they incur in performing these activities. Similarly, Yale and the University of Georgia, the licensors of clevudine, formerly L-FMAU, to Bukwang Pharm. Ind. Co., Ltd., are primarily responsible for patent prosecution activities with respect to clevudine at our expense. As a result, we generally do not have the ability to institute or determine the conduct of any such 8 patent proceedings unless our licensors elect not to institute or to abandon such proceedings. If our licensors elect to institute and prosecute patent proceedings, our rights will depend in part upon the manner in which these licensors conduct the proceedings. In any proceedings they elect to initiate and maintain, these licensors may not vigorously pursue or defend or may decide to settle such proceedings on terms that are unfavorable to us. An adverse outcome of these proceedings could subject us to significant liabilities to third parties, require disputed rights to be licensed from third parties or require us to cease using such technology, any of which could adversely affect our business. Moreover, the mere uncertainty resulting from the initiation and continuation of any technology related litigation or adversarial proceeding could adversely affect our business pending resolution of the disputed matters. We also rely on unpatented trade secrets and know-how to maintain our competitive position, which we seek to protect, in part, by confidentiality agreements with employees, consultants and others. These parties may breach or terminate these agreements, and we may not have adequate remedies for any breach. Our trade secrets may also be independently discovered by competitors. We rely on certain technologies to which we do not have exclusive rights or which may not be patentable or proprietary and thus may be available to competitors. We have filed applications for, but have not obtained, trademark registrations for various marks in the United States and other jurisdictions. We have received U.S. trademark registrations for our corporate name and logo, Coactinon(R) and Coviracil(R). We have also received registrations in the European Union for the mark Coactinon(R) and our corporate logo. Our pending application in the European Union for the mark CoviracilTM has been opposed by Orsem, based upon registrations for the mark Coversyl in various countries, and Les Laboratories Serveir, based on a French registration for the mark Coversyl. We do not believe that the marks Coviracil and Coversyl are confusingly similar, but, in the event they are found to be confusingly similar, we may need to adopt a different product name for emtricitabine in the applicable jurisdictions. Several other companies use trade names that are similar to our name for their businesses. If we are unable to obtain any licenses that may be necessary for the use of our corporate name, we may be required to change our name. Our management personnel were previously employed by other pharmaceutical companies. The prior employers of these individuals may allege violations of trade secrets and other similar claims relating to their drug development activities for us. WE ARE SUBJECT TO EXTENSIVE GOVERNMENT REGULATION AND MAY FAIL TO RECEIVE REGULATORY APPROVAL WHICH COULD PREVENT OR DELAY THE COMMERCIALIZATION OF OUR PRODUCTS. In addition to preclinical testing, clinical trials and other approval procedures for human pharmaceutical products, we are subject to numerous other regulations covering the development of pharmaceutical products. These regulations include, for example, domestic and international regulations relating to the manufacturing, safety, labeling, storage, record keeping, reporting, marketing and promotion of pharmaceutical products. We are also regulated with respect to non-clinical and clinical laboratory practices, safe working conditions, and the use and disposal of hazardous substances, including radioactive compounds and infectious disease agents used in connection with our development work. The requirements vary widely from country to country and some requirements may vary from state to state in the United States. We expect the process of obtaining these approvals and complying with appropriate government regulations to be time consuming and expensive. Even if our drug candidates receive regulatory approval, we may still face difficulties in marketing and manufacturing those drug candidates. Further, any approval may be contingent on postmarketing studies or other conditions. The approval of any of our drug candidates may limit the indicated uses of the drug candidate. A marketed product, its manufacturer and the manufacturer's facilities are subject to continual review and periodic inspections. The discovery of previously unknown problems with a product, manufacturer or facility may result in restrictions on the product or manufacturer, including withdrawal of the product from the market. The failure to comply with applicable regulatory requirements can, among other things, result in: - fines, - suspended regulatory approvals, - refusal to approve pending applications, - refusal to permit exports from the United States, 9 - product recalls, - seizure of products, - injunctions, - operating restrictions, and - criminal prosecutions. In addition, adverse clinical results by others could negatively impact the development and approval of our drug candidates. Some of our drug candidates are intended for use as coactive therapy with one or more other drugs, and adverse safety, effectiveness or regulatory developments in connection with such other drugs will also have an adverse effect on our business. INTENSE COMPETITION MAY RENDER OUR DRUG CANDIDATES NONCOMPETITIVE OR OBSOLETE. We are engaged in segments of the drug industry that are highly competitive and rapidly changing. Any of our current drug candidates that we successfully develop will compete with numerous existing therapies. In addition, many companies are pursuing novel drugs that target the same diseases we are targeting. We believe that a significant number of drugs are currently under development and will become available in the future for the treatment of HIV and hepatitis B. We anticipate that we will face intense and increasing competition as new products enter the market and advanced technologies become available. Our competitors' products may be more effective, or more effectively marketed and sold, than any of our products. Competitive products may render our products obsolete or noncompetitive before we can recover the expenses of developing and commercializing our drug candidates. Furthermore, the development of a cure or new treatment methods for the diseases we are targeting could render our drug candidates noncompetitive, obsolete or uneconomical. Many of our competitors: - have significantly greater financial, technical and human resources than we have and may be better equipped to develop, manufacture and market products, - have extensive experience in preclinical testing and clinical trials, obtaining regulatory approvals and manufacturing and marketing pharmaceutical products, and - have products that have been approved or are in late stage development and operate large, well-funded research and development programs. Smaller companies may also prove to be significant competitors, particularly through collaborative arrangements with large pharmaceutical and biotechnology companies. Academic institutions, governmental agencies and other public and private research organizations are also becoming increasingly aware of the commercial value of their inventions and are more actively seeking to commercialize the technology they have developed. If we successfully develop and obtain approval for our drug candidates, we will face competition based on the safety and effectiveness of our products, the timing and scope of regulatory approvals, the availability of supply, marketing and sales capability, reimbursement coverage, price, patent position and other factors. Our competitors may develop or commercialize more effective or more affordable products, or obtain more effective patent protection, than we do. Accordingly, our competitors may commercialize products more rapidly or effectively than we do, which could hurt our competitive position. BECAUSE WE FACE RISKS RELATED TO OUR LICENSE AND OPTION AGREEMENTS, WE COULD LOSE OUR RIGHTS TO OUR DRUG CANDIDATES. We have in-licensed or obtained an option to in-license our drug candidates under agreements with our licensors. These agreements permit our licensors to terminate the agreements under certain circumstances, such as our failure to achieve certain development milestones or the occurrence of an uncured material breach by us. The 10 termination of any of these agreements could result in the loss of our rights to a drug candidate. Upon termination of most of our license agreements, we are required to return the licensed technology to our licensors. In addition, most of these agreements provide that our licensors are primarily responsible for any patent prosecution activities, such as litigation, patent conflict, patent opposition or other actions, for the technology licensed to us. These agreements also provide that in general we are required to reimburse our licensors for the costs they incur in performing these activities. We believe that these costs as well as other costs under our license and option agreements will be substantial and may increase significantly during the next several years. Our inability or failure to pay any of these costs with respect to any drug candidate could result in the termination of the license or option agreement for the drug candidate. BECAUSE WE MAY BE UNABLE TO SUCCESSFULLY MANUFACTURE OUR DRUG CANDIDATES, OUR BUSINESS MAY NEVER ACHIEVE PROFITABILITY. We do not have any internal manufacturing capacity and we rely on third party manufacturers for the manufacture of all of our clinical trial material. We plan to expand our existing relationships or to establish relationships with additional third party manufacturers for products that we successfully develop. The terms of the Abbott Alliance provide that Abbott Laboratories, Abbott, will manufacture all or a portion of our product requirements for those products that are or become covered by the Abbott Alliance. We may be unable to maintain our relationship with Abbott or to establish or maintain relationships with other third party manufacturers on acceptable terms, and third party manufacturers may be unable to manufacture products in commercial quantities on a cost effective basis. Our dependence upon third parties for the manufacture of our products may adversely affect our profit margins and our ability to develop and commercialize products on a timely and competitive basis. Further, third party manufacturers may encounter manufacturing or quality control problems in connection with the manufacture of our products and may be unable to maintain the necessary governmental licenses and approvals to continue manufacturing our products. WE MAY BE UNABLE TO SUCCESSFULLY MARKET, SELL OR DISTRIBUTE OUR DRUG CANDIDATES. In the United States, we currently intend to market the drug candidates covered by the Abbott Alliance in collaboration with Abbott and to market other drug candidates that we successfully develop, that do not become part of the Abbott Alliance, through a direct sales force. Outside of the United States, we expect Abbott to market drug candidates covered by the Abbott Alliance and, for any other drug candidates that we successfully develop that do not become part of the Abbott Alliance, we intend to market and sell through arrangements or collaborations with third parties. In addition, we expect Abbott to handle the distribution and sale of drug candidates covered by the Abbott Alliance both inside and outside the United States. With respect to the United States, our ability to market the drug candidates that we successfully develop will be contingent upon recruitment, training and deployment of a sales and marketing force as well as the performance of Abbott under the Abbott Alliance. We may be unable to establish marketing or sales capabilities or to maintain arrangements or enter into new arrangements with third parties to perform those activities on favorable terms. In addition, any such third parties may have significant control or influence over important aspects of the commercialization of our drug candidates, including market identification, marketing methods, pricing, composition of sales force and promotional activities. We also may have limited control over the amount and timing of resources that a third party may devote to our drug candidates. Our business may never achieve profitability if we fail to establish or maintain a sales force and marketing, sales and distribution capabilities. BECAUSE WE DEPEND ON THIRD PARTIES FOR THE DEVELOPMENT AND ACQUISITION OF DRUG CANDIDATES, WE MAY NOT BE ABLE TO SUCCESSFULLY ACQUIRE ADDITIONAL DRUG CANDIDATES OR COMMERCIALIZE OR DEVELOP OUR CURRENT DRUG CANDIDATES. We have engaged and intend to continue to engage third party contract research organizations and other third parties to help us develop our drug candidates. Although we have designed the clinical trials for our drug candidates, the contract research organizations have conducted many of the clinical trials. As a result, many important aspects of our drug development programs have been and will continue to be outside of our direct control. In addition, the contract research organizations may not perform all of their obligations under arrangements with us. If the contract research organizations do not perform clinical trials in a satisfactory manner or breach their obligations to us, the development and commercialization of any drug candidate may be delayed or precluded. We do not currently intend to engage in drug discovery. Our strategy for obtaining additional drug candidates is to 11 utilize the relationships of our management team and scientific consultants to identify drug candidates for in-licensing from companies, universities, research institutions and other organizations. We may not succeed in acquiring additional drug candidates on acceptable terms or at all. BECAUSE WE MAY NOT BE ABLE TO ATTRACT AND RETAIN KEY PERSONNEL AND ADVISORS, WE MAY NOT SUCCESSFULLY DEVELOP OUR PRODUCTS OR ACHIEVE OUR OTHER BUSINESS OBJECTIVES. We are highly dependent on our senior management and scientific staff, including Dr. David Barry, our Chairman and Chief Executive Officer. We have entered into employment agreements with each officer of Triangle. Dr. Barry's employment agreement contains certain non-competition provisions. In addition, the employment agreements for each officer provide for certain severance payments which are contingent upon each officer's refraining from competition with Triangle. The loss of the services of any member of our senior management or scientific staff may significantly delay or prevent the achievement of product development and other business objectives. Our ability to attract and retain qualified personnel, consultants and advisors is critical to our success. In order to pursue our drug development programs and marketing plans, we will need to hire additional qualified scientific and management personnel. Competition for qualified individuals is intense and we face competition from numerous pharmaceutical and biotechnology companies, universities and other research institutions. We may be unable to attract and retain these individuals, and our failure to do so would have an adverse effect on our business. HEALTH CARE REFORM MEASURES AND THIRD PARTY REIMBURSEMENT PRACTICES ARE UNCERTAIN AND MAY ADVERSELY IMPACT THE COMMERCIALIZATION OF OUR PRODUCTS. The efforts of governments and third party payors to contain or reduce the cost of health care will continue to affect the business and financial condition of drug companies. A number of legislative and regulatory proposals to change the health care system have been proposed in recent years. In addition, an increasing emphasis on managed care in the United States has and will continue to increase pressure on drug pricing. While we cannot predict whether legislative or regulatory proposals will be adopted or what effect those proposals or managed care efforts may have on our business, the announcement and/or adoption of such proposals or efforts could have an adverse effect on our profit margins and financial condition. Sales of prescription drugs depend significantly on the availability of reimbursement to the consumer from third party payors, such as government and private insurance plans. These third party payors frequently require that drug companies give them predetermined discounts from list prices, and they are increasingly challenging the prices charged for medical products and services. Present coactive treatment regimens for the treatment of HIV are expensive; published reports indicate the cost per patient per year can exceed $13,000, and may increase as new combinations are developed. These costs have resulted in limitations in the reimbursement available from third party payors for the treatment of HIV infection, and we expect that reimbursement pressures will continue in the future. If we succeed in bringing one or more products to the market, these products may not be considered cost effective and reimbursement to the consumer may not be available or sufficient to allow us to sell our products on a competitive basis. IF OUR DRUG CANDIDATES DO NOT ACHIEVE MARKET ACCEPTANCE, OUR BUSINESS MAY NEVER ACHIEVE PROFITABILITY. Our success will depend on the market acceptance of any products we develop. The degree of market acceptance will depend upon a number of factors, including the receipt and scope of regulatory approvals, the establishment and demonstration in the medical community of the safety and effectiveness of our products and their potential advantages over existing treatment methods, and reimbursement policies of government and third party payors. Physicians, patients, payors or the medical community in general may not accept or utilize any product that we may develop. WE MAY NOT HAVE ADEQUATE INSURANCE PROTECTION AGAINST PRODUCT LIABILITY. Our business exposes us to potential product liability risks that are inherent in the testing of drug candidates and the manufacturing and marketing of drug products and we may face product liability claims in the future. We currently have only limited product liability insurance. We may be unable to maintain our existing insurance and/or obtain additional insurance in the future at a reasonable cost or in sufficient amounts to protect against potential 12 losses. A successful product liability claim or series of claims brought against us could require us to pay substantial amounts that would decrease our profitability, if any. WE MAY INCUR SUBSTANTIAL COSTS RELATED TO OUR USE OF HAZARDOUS MATERIALS. We use hazardous materials, chemicals, viruses and various radioactive compounds in our drug development programs. Although we believe that our handling and disposing of these materials comply with state and federal regulations, the risk of accidental contamination or injury still exists. In the event of such an accident, we could be held liable for any damages or fines that result and any such liability could exceed our resources. OUR CONTROLLING STOCKHOLDERS MAY MAKE DECISIONS WHICH YOU DO NOT CONSIDER TO BE IN YOUR BEST INTEREST. As of September 30, 2000, our directors, executive officers and their affiliates, excluding Abbott, owned approximately 12.4% of our outstanding common stock and Abbott owned approximately 17.3% of our outstanding common stock. Pursuant to the terms of the Abbott Alliance, Abbott has the right to purchase additional amounts of our common stock up to a maximum aggregate percentage of 21% of our outstanding common stock and has certain rights to purchase shares directly from us in order to maintain its existing level of ownership, also known as antidilution protection. One Abbott designee serves as a member of our Board of Directors. As a result, our controlling stockholders are able to significantly influence all matters requiring stockholder approval, including the election of directors and the approval of significant corporate transactions. This concentration of ownership could also delay or prevent a change in control of Triangle that may be favored by other stockholders. THE MARKET PRICE OF OUR STOCK MAY BE ADVERSELY AFFECTED BY MARKET VOLATILITY. The market price of our common stock is likely to be volatile and could fluctuate widely in response to many factors, including: - announcements of the results of clinical trials by us or our competitors, - developments with respect to patents or proprietary rights, - announcements of technological innovations by us or our competitors, - announcements of new products or new contracts by us or our competitors, - actual or anticipated variations in our operating results due to the level of development expenses and other factors, - changes in financial estimates by securities analysts and whether our earnings meet or exceed such estimates, - conditions and trends in the pharmaceutical and other industries, - new accounting standards, - general economic, political and market conditions and other factors, and - the occurrence of any of the risks described in these "Risk Factors." In the past, following periods of volatility in the market price of the securities of companies in our industry, securities class action litigation has often been instituted against those companies. If we face such litigation in the future, it would result in substantial costs and a diversion of management attention and resources, which would negatively impact our business. 13 In addition, if our stockholders sell a substantial number of shares of our common stock in the public market, the market price of our common stock could be reduced. As of September 30, 2000, there were 38,313,803 shares of common stock outstanding, of which approximately 24,600,000 were immediately eligible for resale in the public market without restriction. Holders of approximately 7,150,000 shares have rights to cause us to register them for sale to the public. We have filed registration statements to register the sale of approximately 3,900,000 of these shares. In addition, Abbott will have the right on or after June 30, 2002 to cause us to register for resale in the public market the 6,571,428 shares of common stock purchased at the closing of the Abbott Alliance. Any such sales may make it more difficult for us to raise needed working capital through an offering of our equity or convertible debt securities and may reduce the market price of our common stock. Declines in our stock price might harm our ability to issue equity under various financing arrangements including our Facility or other transactions. The price at which we issue shares in such transactions is generally based on the market price of our common stock and a decline in our stock price would result in our needing to issue a greater number of shares to raise a given amount of funds or acquire a given amount of goods or services. For this reason, a decline in our stock price might also result in increased ownership dilution to our stockholders. A low stock price might impair our ability to raise capital under the Facility described below under "Plan of Distribution" because the Underwriter and the Investor are not obligated to sell or purchase shares of our common stock under the Facility on a given day if our average stock price during such day is less than $4.00 per share or less than any higher floor price specified by us. OUR STOCK PRICE COULD DECLINE AND OUR STOCKHOLDERS COULD EXPERIENCE SIGNIFICANT OWNERSHIP DILUTION DUE TO OUR ABILITY TO ISSUE SHARES UNDER THE FACILITY. Pursuant to the Facility described under "Plan of Distribution," we may sell, subject to various restrictions, up to $100 million of common stock over a three-year period. The aggregate number of shares that may be issued under the Facility depends on a number of factors, including the market price and trading volume of our common stock during each 15-trading day selling period. Because the price of any shares we choose to sell under the Facility is based on the market price of the common stock on the date of sale, both the number of shares we would have to sell in order to raise any given amount of funding and the associated ownership dilution experienced by our stockholders will be greater if the price of our common stock declines. The lowest price at which common stock may be sold under the Facility is $4.00 per share. The perceived risk associated with the possible sale of a large number of shares under the Facility could cause some of our stockholders to sell their stock, thus causing the price of our stock to decline. In addition, actual or anticipated downward pressure on our stock price due to actual or anticipated sales of our common stock under the Facility could cause some institutions or individuals to engage in short sales of our common stock, which may itself cause the price of our stock to decline. ANTITAKEOVER PROVISIONS IN OUR CHARTER DOCUMENTS AND DELAWARE LAW COULD DELAY, DEFER OR PREVENT A TENDER OFFER OR TAKEOVER ATTEMPT THAT YOU CONSIDER TO BE IN YOUR BEST INTEREST. We have adopted a number of provisions that could have antitakeover effects. On January 29, 1999, our Board of Directors, the Board, adopted a preferred stock purchase rights plan, commonly referred to as a "poison pill." The rights plan is intended to deter an attempt to acquire Triangle in a manner or on terms not approved by the Board. Thus, the rights plan will not prevent an acquisition of Triangle which is approved by the Board. Our charter authorizes the Board to issue shares of undesignated preferred stock without stockholder approval on terms as the Board may determine. Moreover, the issuance of preferred stock may make it more difficult for a third party to acquire, or may discourage a third party from acquiring, voting control of Triangle. Our bylaws divide the Board into three classes of directors with each class serving a three year term. These and other provisions of our charter and our bylaws, as well as certain provisions of Delaware law, could delay or impede the removal of incumbent directors and could make more difficult a merger, tender offer or proxy contest involving Triangle, even if the events could be beneficial to our stockholders. These provisions could also limit the price that investors might be willing to pay for our common stock. 14 WE HAVE NOT DECLARED OR PAID ANY DIVIDENDS ON OUR COMMON STOCK. We have never declared or paid any cash dividends on our common stock, and we currently do not intend to pay any cash dividends on our common stock in the foreseeable future. We intend to retain our earnings, if any, for the operation of our business. FORWARD-LOOKING STATEMENTS This prospectus contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended. All statements, other than statements of historical facts, included in, or incorporated by reference into this prospectus, are forward-looking statements. In addition, when used in this document, the words "anticipate", "estimate", "project", and similar expressions are intended to identify forward-looking statements. These forward-looking statements are subject to various risks or uncertainties and assumptions. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, estimated or projected. Although we believe that the expectations reflected in these forward-looking statements are reasonable, no assurance can be given that such expectations will prove to have been correct. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, including the risks outlined under "Risk Factors," that may cause our or our industry's actual results, levels of activity, performance or achievements to be materially different from future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of these statements. We are under no duty to update any of the forward-looking statements after the date of this prospectus or to conform these statements to actual results unless required by law. USE OF PROCEEDS We cannot guarantee that we will receive any proceeds in connection with this offering because we may choose not to issue any shares of common stock. Unless otherwise provided in a supplement or amendment to this prospectus, we intend to use any net proceeds from this offering, together with other available funds, for operating costs, capital expenditures and working capital needs, which may include costs of further preclinical development and clinical testing of drug candidates in our pipeline, development of the infrastructure necessary to support those activities, marketing expenses, expenses incurred in the protection of intellectual property, payment of license fees, and amounts paid to licensors, and for other general corporate purposes. We have not specifically identified the precise amounts we will spend on each of these areas or the timing of these expenditures. The proceeds of this offering may also be used to acquire companies or intellectual property that complement our business, although we cannot at this time predict whether any of these types of acquisitions will occur in the near future. The amounts actually expended for each purpose may vary significantly depending upon numerous factors, including the amount and timing of the proceeds from this offering, progress with clinical drug development and other drug development programs. In addition, expenditures may also depend on the establishment of new collaborative arrangements with other companies, the availability of other financing, and other factors. We anticipate that we will be required to raise substantial additional capital to continue to fund the clinical development of our drug candidates. Additional capital may be raised through additional public or private financing, as well as collaborative relationships, incurring debt and other available sources. 15 PLAN OF DISTRIBUTION FIRM UNDERWRITTEN EQUITY FACILITY On November 1, 2000, we entered into a common stock underwriting agreement with Ramius Securities, LLC, the Underwriter, a limited liability company organized and existing under the laws of the State of Delaware and a stand-by purchase agreement with Ramius Capital Group, LLC, the Investor, a limited liability company organized and existing under the laws of the State of Delaware. Pursuant to the underwriting agreement, the Underwriter agrees to sell, on a best efforts basis, up to $100 million of our common stock during 15-trading day selling periods which we select over the next three years. The Underwriter may sell our common stock at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices but not below a floor price set by us for each selling period. We are not obligated to sell any shares of our stock and a selling period will not begin except upon our instruction. If the Underwriter does not sell the requisite number of shares of our common stock during a selling period, then under the terms of the purchase agreement, the Investor is obligated to purchase from us the remaining number of shares of our common stock so long as certain share price and volume limitations are met. The underwriting agreement and the purchase agreement are referred to as the firm underwritten equity facility or the Facility. We will pay the offering expenses related to the Facility, estimated to be $400,000. Pursuant to the underwriting agreement, we may elect (but are under no obligation) to initiate a selling period by delivering a capital demand notice to the Underwriter, at any time during the three year term of the underwriting agreement, to sell an amount not less than $1 million and not more than $30 million in market value of our common stock. Upon receipt of each capital demand notice, the Underwriter agrees to sell on a best efforts basis, on our behalf, over a 15-trading day selling period, the number of shares of our common stock equal to the amount requested in the capital demand notice. The Underwriter may sell an additional 10% of the amount of common stock we requested to be sold during a selling period to cover over-allotments. Ramius Securities, LLC is an "underwriter" within the meaning of the Securities Act in connection with its sale of the shares pursuant to the underwriter agreement. Rule 415 under the Securities Act imposes limits on the dollar amount of securities that may be registered pursuant to a single registration statement (or amendments thereto) relating to an "at-the-market" offering. The registered amount may not exceed 10% of the aggregate market value of our outstanding common stock held by non-affiliates. For this reason, we are currently registering $24 million in aggregate amount of shares of our common stock for issuance and sale under the Facility and we intend to file additional amendments or registration statements, as needed, for the sale of additional shares under the Facility. CAPITAL DEMAND NOTICE PROCEDURE We may commence a 15-trading day selling period by delivering a capital demand notice to the Underwriter stating: the dollar amount of common stock that the Underwriter is obligated to sell during the selling period (subject to certain limitations set forth in the underwriting agreement) and the minimum floor price below which we are not willing to sell any shares. The minimum floor price may vary in each capital demand notice, however, it may never be less than $4.00 per share. The Underwriter is permitted to sell, during each selling period, up to 110% of the minimum dollar amount described in the capital demand notice. At the end of each trading day of a selling period, the Underwriter will notify both us and our transfer agent of the number of shares of common stock that the Underwriter has sold on that day. We must deliver the number of shares of common stock set forth in the sales notice to the Underwriter by the third trading day following receipt of the sales notice, the settlement date. We have agreed to pay to the Underwriter at the end of each trading day an underwriting commission equal to (1) the daily gross proceeds from the sales of common stock less (2) the 16 aggregate number of shares sold multiplied by a number equal to 95.75% of the daily volume weighted average price per share of the common stock on the Nasdaq National Market. The Underwriter must notify us in writing if it has not received the shares of common stock by the settlement date. After receipt of this notice, we must deliver the shares within five (5) business days of the settlement date, or we must reimburse the Underwriter for any damages incurred by the Underwriter from this failure and the Underwriter may terminate the underwriting agreement. TERMINATION, SUSPENSION AND MODIFICATION OF THE UNDERWRITER'S OBLIGATION TO SELL SHARES OF COMMON STOCK The Underwriter is not obligated to sell any shares of common stock for us pursuant to a capital demand notice, nor may we deliver a capital demand notice to the Underwriter, under the following circumstances: - the registration statement has been withdrawn or the effectiveness of the registration statement has been suspended; - the common stock to be purchased is not validly listed on the Nasdaq National Market (or another principal market); - we have failed to fulfill all of the conditions precedent described below; - we have failed to provide the Underwriter with the due diligence materials requested; - the daily volume weighted average price per share of our common stock falls below the floor price set forth in the capital demand notice for five consecutive trading days during a selling period; - we have failed to comply with the covenants described below; or - we have merged or consolidated the Company with or into another entity or have transferred all or substantially all of our assets to another entity. We must notify the Underwriter in writing immediately upon the occurrence of one of the blocking events described above. If one or more of the blocking events described above occurs during a selling period, at the Underwriter's election: - the selling period and the Underwriter's obligation to sell shares will be extended by the number of trading days the blocking event existed preventing the sale of shares of common stock; - the Underwriter may waive in writing the blocking event and continue to sell shares of common stock during the selling period; or - the obligation of the Underwriter to sell shares of common stock during the selling period will be canceled for the selling period, the Underwriter will be entitled to rescind any sales made during the selling period, and we will be liable for all actual damages incurred by the Underwriter as a result of a blocking event. If a blocking event occurs during a selling period, we have agreed to use our reasonable best efforts to cure the blocking event, if curable, within 24 hours. 17 THE INVESTOR'S OBLIGATION TO PURCHASE SHARES OF COMMON STOCK If the Underwriter fails to fulfill its obligation to sell the requisite number of shares of our common stock during a selling period, then under the terms of the purchase agreement, the Investor is obligated to purchase from us the remaining minimum number of shares of our common stock specified in the capital demand notice for that selling period. The purchase price of the shares of common stock will be 95.75% of the daily volume weighted average price per share of the common stock on the Nasdaq National Market (or other principal market) for the first trading day following the expiration of the selling period, provided however, that if that price is below the minimum floor price established by us in the capital demand notice, then the purchase price will be the minimum floor price. The closing date for the purchase of the common stock will be the first trading day following the expiration of the selling period. The settlement date for the purchase will be the third trading day following the closing date. We must deliver the shares of common stock to the Investor on the settlement date, and upon delivery, the Investor will deliver to us the purchase price. The Investor must notify us in writing if it has not received the shares of common stock by the settlement date. After receipt of this notice, we must deliver the shares within five (5) business days of the settlement date, or we must reimburse the Investor for any damages incurred by the Investor due to this failure and the Investor may terminate the purchase agreement. If the Investor becomes obligated to purchase shares of our common stock pursuant to the purchase agreement, Ramius Capital Group, LLC will be an "underwriter" within the meaning of the Securities Act in connection with its sale of the shares acquired under the purchase agreement with us. TERMINATION, SUSPENSION AND MODIFICATION OF THE INVESTOR'S OBLIGATION TO PURCHASE SHARES OF COMMON STOCK The Investor is not obligated to purchase shares of our common stock under the following circumstances: - the aggregate dollar amount of the common stock that the Underwriter failed to sell during the selling period is less than $50,000; - the registration statement has been withdrawn or the effectiveness of the registration statement has been suspended; - the common stock to be purchased is not validly listed on the Nasdaq National Market (or another principal market); - we have failed to fulfill all of the conditions precedent described below; - we have failed to provide the Investor with the due diligence materials requested; - the daily volume weighted average price per share of the common stock falls below the floor price set forth in the capital demand notice for five consecutive trading days during a selling period; - we have failed to comply with the covenants described below; or - we have merged or consolidated the Company with or into another entity or have transferred all or substantially all of our assets to another entity. We must notify the Investor in writing immediately upon the occurrence of one of the blocking events described above. The Investor may waive any blocking event in writing and elect to purchase the shares. In addition, pursuant to the terms of the purchase agreement, the Investor is not required or allowed to purchase shares of our common stock, if, when aggregated with all other shares of our common stock then 18 beneficially owned by the Investor, the purchase would result in the Investor beneficially owning more than 4.9% of our issued and outstanding common stock on such date. CONDITIONS PRECEDENT TO THE OBLIGATION OF THE UNDERWRITER TO SELL COMMON STOCK PURSUANT TO A CAPITAL DEMAND NOTICE OR THE INVESTOR'S OBLIGATION TO PURCHASE SHARES OF COMMON STOCK PURSUANT TO THE PURCHASE AGREEMENT The following conditions must be satisfied before the Underwriter is obligated to sell common stock pursuant to a capital demand notice and before the Investor is obligated to purchase shares of common stock pursuant to the purchase agreement: - a registration statement covering the shares to be sold must be declared effective by the SEC and must remain effective and available during the selling period and on the date of purchase by the Investor; - the representations and warranties to the Underwriter contained in the underwriting agreement must be true and correct in all material respects on each trading day of a selling period and the representations and warranties to the Investor contained in the purchase agreement must be true and correct in all material respects on the first trading day following the expiration of the selling period for which the Underwriter failed to fulfill its obligation to sell the requested number of shares of common stock; - we must have performed our obligations under the underwriting agreement at or prior to each trading day of a selling period or we must have performed our obligations under the purchase agreement at or prior to the first trading day following the expiration of the selling period for which the Underwriter failed to fulfill its obligation to sell the requested number of shares of common stock; - no statute, rule, regulation, executive order, decree, ruling or injunction may be in effect which prohibits or adversely affects any of the transactions contemplated by the underwriting agreement or the purchase agreement; - since the date through which our most recent quarterly report on Form 10-Q or Form 10-K has been prepared and filed with the SEC, no event which had or is reasonably likely to have a material adverse effect on our business has occurred; - our common stock has been approved for quotation on the Nasdaq National Market or another approved market and trading in our common stock has not been suspended by the SEC, the Nasdaq National Market (or such other approved market), or the National Association of Securities Dealers, Inc.; - the issuance and sale of the shares of common stock must not violate the stockholder approval requirements of the Nasdaq National Market; - the Underwriter must have completed its due diligence review of us and be reasonably satisfied with the adequacy of the disclosure contained in the registration statement; - we must have issued instructions to the Underwriter's clearing broker to release the selling commission at the Underwriter's request; and - we must have issued instructions to the transfer agent to issue stock certificates or to electronically issue shares to the Underwriter or the Investor, as may be the case. Prior to the first trading day of any selling period following the filing of any documents with the SEC pursuant to the Securities Exchange Act of 1934 to be incorporated by reference into this registration statement and prospectus, we must provide to the Underwriter a legal opinion and a "comfort" letter from our accountants as to 19 certain financial information contained in the registration statement. In addition, on the first trading day of any selling period we must provide to the Underwriters a legal opinion regarding certain matters set forth in the underwriting agreement. Furthermore, on the first trading day of each selling period we must deliver a certificate executed by an executive officer stating that all the conditions precedent described above have been satisfied. Prior to the first trading day following the expiration of any selling period for which the Underwriter fails to fulfill its obligation to sell the requested number of shares of common stock, we must deliver to the Investor the legal opinions, comfort letter and officer's certificate described above. ADDITIONAL COVENANTS UNDER THE UNDERWRITING AGREEMENT AND THE PURCHASE AGREEMENT We have agreed with the Underwriter under the underwriting agreement and the Investor under the purchase agreement that we will: - reserve for issuance, prior to the commencement of any selling period, the requisite number of shares of common stock; - notify the Underwriter and the Investor each time that we file a report or document with the SEC; and - refrain from entering into any equity line or similar transaction with one or more underwriters other than Ramius Securities. The Underwriter and the Investor have agreed with us under the underwriting agreement and the purchase agreement that they will: - promptly notify and furnish to us information regarding the Underwriter, the Investor or the distribution as is required to be disclosed in the registration statement and prospectus; and - refrain from engaging in any short selling activities with respect to our common stock. TERMINATION OF THE UNDERWRITING AGREEMENT AND THE PURCHASE AGREEMENT The underwriting agreement and the purchase agreement will automatically terminate upon the earlier of November 1, 2003, or the date that the Underwriter has sold an aggregate of $100 million of common stock pursuant to capital demand notices. In addition, we may terminate the underwriting agreement and the purchase agreement in our sole discretion at any time. Furthermore, the Underwriter may terminate the underwriting agreement and the Investor may terminate the purchase agreement under the following circumstances: - if we breach any of the material representations, warranties, covenants or other obligations and fail to cure the breach within the 30-day cure period; - if we effect any merger or consolidation of the Company with or into another entity or if we sell all or substantially all of our assets to another entity; or - if the Underwriter or the Investor reasonably determines that the adoption of, or change in, or any change in interpretation or application of, any law, regulation, rule, guideline or treaty, makes it illegal or materially impracticable to fulfill its commitments under the underwriting agreement or the purchase agreement. 20 PURCHASE OPTION Under the underwriting agreement, we granted to the Underwriter the right to purchase up to 300,000 shares of common stock at a price equal to $13.00 per share, subject to certain adjustments as described in the underwriting agreement. The purchase option terminates on the earlier of November 1, 2003 or the date upon which the purchase option is exercised in full by the Underwriter. INDEMNIFICATION OF THE UNDERWRITER AND THE INVESTOR We have agreed to indemnify the Underwriter and the Investor against various civil liabilities, including liabilities under the Securities Act (except for liabilities relating to material misstatements or omissions in information supplied by the Underwriter or Investor to us for inclusion in the registration statement and prospectus), or to contribute the payments that the Underwriter or Investor may be required to make in respect of such liabilities. LEGAL MATTERS For purposes of this offering, Brobeck, Phleger & Harrison LLP, New York, New York, is giving its opinion as to the validity of the shares. EXPERTS The financial statements incorporated in this prospectus by reference to the Annual Report on Form 10-K of Triangle for the year ended December 31, 1999, have been incorporated in reliance on the report of PricewaterhouseCoopers LLP, independent accountants, given on the authority of that firm as experts in auditing and accounting. 21 PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION. The following table sets forth all expenses payable by the Registrant in connection with the sale of the common stock being registered. All the amounts shown are estimates, except for the registration fee. Registration Fee......................................... $6,336 Legal fees and expenses*................................. 100,000 Accounting fees and expenses*............................ 20,000 Printing*................................................ 12,000 Transfer Agent and Registrar Fees*....................... 1,500 Nasdaq Filing Fees*...................................... 35,000 Miscellaneous Expenses*.................................. 205,164 TOTAL........................................... $380,000 ================================================================ *Estimated. ITEM 15. INDEMNIFICATION OF OFFICERS AND DIRECTORS. Section 145 of the Delaware General Corporation Law permits indemnification of officers and directors of Triangle under certain conditions and subject to certain limitations. Section 145 of the Delaware General Corporation Law also provides that a corporation has the power to purchase and maintain insurance on behalf of its officers and directors against any liability asserted against such person and incurred by him or her in such capacity, or arising out of his or her status as such, whether or not the corporation would have the power to indemnify him or her against such liability under the provisions of Section 145 of the Delaware General Corporation Law. Article VII, Section (i) of the Restated Bylaws of Triangle provides that Triangle shall indemnify its directors and executive officers to the fullest extent not prohibited by the Delaware General Corporation Law. The rights to indemnity thereunder continue as to a person who has ceased to be a director, officer, employee or agent and inure to the benefit of the heirs, executors and administrators of the person. In addition, expenses incurred by a director or officer in defending any civil, criminal, administrative or investigative action, suit or proceeding by reason of the fact that he or she is or was a director or officer of Triangle (or was serving at Triangle's request as a director or officer of another corporation) shall be paid by Triangle in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that he or she is not entitled to be indemnified by Triangle as authorized by the relevant Section of the Delaware General Corporation Law. As permitted by Section 102(b)(7) of the Delaware General Corporation Law, Article 5, Section (a) of Triangle's Second Restated Certificate of Incorporation provides that a director of Triangle shall not be personally liable for monetary damages for breach of fiduciary duty as a director, except for liability (i) for any breach of the director's duty of loyalty to Triangle or its stockholders, (ii) for acts or omissions not in good faith or acts or omissions that involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the Delaware General Corporation Law or (iv) for any transaction from which the director derived any improper personal benefit. Triangle has entered into indemnification agreements with its directors and executive officers. Generally, the indemnification agreements attempt to provide the maximum protection permitted by Delaware law as it may be amended from time to time. Under such additional indemnification provisions, however, an individual will not receive indemnification for judgments, settlements or expenses if he or she is found liable to Triangle (except to the extent the court determines he or she is fairly and reasonably entitled to indemnity for expenses), for settlements not approved by Triangle or for settlements and expenses if the settlement is not approved by the court. The indemnification agreements provide for Triangle to advance to the individual any and all reasonable expenses (including legal fees and expenses) incurred in investigating or defending any such action, suit or proceeding. In II-1 order to receive an advance of expenses, the individual must submit to Triangle copies of invoices presented to him or her for such expenses. Also, the individual must repay such advances upon a final judicial decision that he or she is not entitled to indemnification. The Registrant has an insurance policy covering the directors and officers of the Registrant with respect to certain liabilities, including liabilities arising under the Securities Act or otherwise. ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES. (A) EXHIBITS. EXHIBIT NO. DESCRIPTION ----------- ----------- 1.1+ Common Stock Underwriting Agreement dated as of November 1, 2000 between the Registrant and Ramius Securities, LLC 4.1* Instruments defining the rights of stockholders. Reference is made to the Registration Statement on Form 8-A, filed October 18, 1996 (file no. 000-21589), and the Registration Statement on Form 8-A, filed February 10, 1999 (file no. 000-21589), as amended on June 18, 1999 (file no. 000-21589). 5.1** Opinion of Brobeck, Phleger & Harrison LLP 10.1+ Stand-by Purchase Agreement dated as of November 1, 2000 between the Registrant and Ramius Capital Group, LLC 23.1 Consent of PricewaterhouseCoopers LLP, Independent Accountants 23.2** Consent of Brobeck, Phleger & Harrison LLP. Reference is made to Exhibit 5.1. 24.1** Power of Attorney + Previously filed as an exhibit to our Report on Form 8-K filed on November 3, 2000. * Previously filed. **Previously filed with our Registration Statement on Form S-3 filed on October 20, 2000. ITEM 17. UNDERTAKINGS. The undersigned Registrant hereby undertakes: (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement; (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering. The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report II-2 pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. The undersigned Registrant hereby undertakes to deliver or cause to be delivered with the Prospectus, to each person to whom the Prospectus is sent or given, the latest annual report to security holders that is incorporated by reference in the Prospectus and furnished pursuant to and meeting the requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of 1934; and, where interim financial information required to be presented by Article 3 of Regulation S-X are not set forth in the Prospectus, to deliver, or cause to be delivered to each person to whom the Prospectus is sent or given, the latest quarterly report that is specifically incorporated by reference in the Prospectus to provide such interim financial information. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of Triangle pursuant to the foregoing provisions, Delaware Corporation law, the Underwriting Agreement or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefor, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer, or controlling person of the Registrant in the successful defense of any action, suit, or proceeding) is asserted by such director, officer, or controlling person in connection with the securities being registered hereunder, the Registrant will, unless in the opinion of its counsel the question has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. The undersigned registrant hereby undertakes that: (1) For determining any liability under the Securities Act, treat the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by us under the Rule 424(b)(1), or (4) or 497(h) under the Securities Act as part of this registration statement as of the time the SEC declared it effective. (2) For determining any liability under the Securities Act, treat each post-effective amendment that contains a form of prospectus as a new registration statement for the securities offered in the registration statement, and that offering of the securities at that time as the bona fide offering of those securities. II-3 SIGNATURES Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Durham, State of North Carolina, on the 17th day of November, 2000. TRIANGLE PHARMACEUTICALS, INC. By: /s/ CHRIS A. RALLIS ------------------------------------ Chris A. Rallis President and Chief Operating Officer Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in this capacities and on the dates indicated: Signature Title --------- ----- * Chairman of the Board and Chief Executive Officer November 17, 2000 - --------------------------------------- (Principal Executive Officer) David W. Barry /s/ CHRIS A. RALLIS Director, President and Chief Operating Officer November 17, 2000 - --------------------------------------- Chris A. Rallis /s/ ROBERT F. AMUNDSEN JR. Executive Vice President and Chief Financial November 17, 2000 - --------------------------------------- Officer (Principal Financial and Accounting Robert F. Amundsen, Jr. Officer) * Director November 17, 2000 - --------------------------------------- Anthony B. Evnin * Director November 17, 2000 - --------------------------------------- Standish M. Fleming * Director November 17, 2000 - --------------------------------------- Dennis B. Gillings * Director November 17, 2000 - --------------------------------------- Arthur J. Higgins * Director November 17, 2000 - --------------------------------------- Henry G. Grabowski * Director November 17, 2000 - --------------------------------------- George McFadden *By: /s/ CHRIS A. RALLIS - --------------------------------------- Chris A. Rallis Attorney-in-Fact II-4 EXHIBIT INDEX EXHIBIT NO. DESCRIPTION - ----------- ----------- 1.1+ Common Stock Underwriting Agreement dated as of November 1, 2000 between the Registrant and Ramius Securities, LLC 4.1* Instruments defining the rights of stockholders. Reference is made to the Registration Statement on Form 8-A, filed October 18, 1996 (file no. 000-21589), and the Registration Statement on Form 8-A, filed February 10, 1999 (file no. 000-21589), as amended on June 18, 1999 (file no. 000-21589). 5.1** Opinion of Brobeck, Phleger & Harrison LLP. 10.1+ Stand-by Purchase Agreement dated as of November 1, 2000 between the Registrant and Ramius Capital Group, LLC 23.1 Consent of PricewaterhouseCoopers LLP, Independent Accountants. 23.2** Consent of Brobeck, Phleger & Harrison LLP. Reference is made to Exhibit 5.1. 24.1** Power of Attorney. + Previously filed as an exhibit to our Report on Form 8-K filed on November 3, 2000. * Previously filed. **Previously filed with our Registration Statement on Form S-3 filed on October 20, 2000. II-5