As filed with the Securities and Exchange Commission on June 25, 1996 Registration No. 33-87138 ================================================================================ SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-1 REGISTRATION STATEMENT ON FORM S-3 Under the Securities Act of 1933 ----------------- PDT, INC. (Exact name of registrant as specified in its charter) DELAWARE 7408 HOLLISTER AVENUE 77-0222872 SANTA BARBARA, CALIFORNIA 93117 (I.R.S. Employer (State or other (805) 685-9880 Identification No.) jurisdiction of incorporation or organization) (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) GARY S. KLEDZIK, PH.D. PDT, INC. 7408 HOLLISTER AVENUE SANTA BARBARA, CALIFORNIA 93117 (805) 685-9880 (Name, address, including zip code, and telephone number, including area code, of agent for service) ----------------- COPY TO: THEODORE R. MALONEY, ESQ. NIDA & MALONEY A PROFESSIONAL CORPORATION 801 GARDEN STREET, SUITE 201 SANTA BARBARA, CALIFORNIA 93101-1580 (805) 568-1151 ----------------- APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE OF THE SECURITIES TO THE PUBLIC: FROM TIME TO TIME AFTER THE EFFECTIVE DATE OF THE REGISTRATION STATEMENT. ----------------- If the only 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, please 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./ / ------------------- 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 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8 (a), may determine. ================================================================================ PROSPECTUS PDT, Inc. Common Stock ($.01 par value) This Prospectus relates to the offering and sale of 37,986 shares of the Common Stock, par value $.01 per share (the "Common Stock") of PDT, Inc., a Delaware corporation (the "Company" or "PDTI") by certain holders thereof named herein (each a "Selling Shareholder") from time to time after the date hereof (such shares being referred to collectively as the "Shares"). See "Shares Being Offered" and "Selling Shareholders." Shares of the Common Stock are traded on The Nasdaq National Market under the symbol "PDTI." On June 24, 1996 the last sale price of the Common Stock as reported by Nasdaq was $35.75 per share. THE SHARES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK. SEE "RISK FACTORS" BEGINNING AT PAGE 4. ---------------------------- THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. ---------------------------- Each of the shares of Common Stock offered hereby may be offered for sale and sold by the Selling Shareholders from time to time in varying amounts, including in block transactions, on The Nasdaq National Market at then prevailing prices or in private transactions at prices and on terms to be determined at the time of sale. The Shares may be sold by the Selling Shareholders directly, through an underwritten offering, through agents designated from time to time or to or through broker-dealers designated from time to time. To the extent required, the number and series of Shares to be sold, the name of the Selling Shareholders, the purchase price, the public offering price, if applicable, the name of any such agent or broker-dealer, and any applicable commissions, discounts or other items constituting compensation to such underwriters, agents or broker-dealers with respect to a particular offering will be set forth in a supplement or supplements to this Prospectus (each, a "Prospectus Supplement"). The aggregate proceeds to the Selling Shareholders from the sale of the Shares so offered will be the purchase price of the Shares sold less (i) the aggregate commissions, discounts and other compensation, if any, paid by the Selling Shareholders to underwriters, agents or broker-dealers and (ii) certain other expenses of the offering and sale of the Shares that will be the responsibility of the Selling Shareholders. See "Selling Shareholders" and "Plan of Distribution." The Company will not receive any proceeds from the sale of the Shares. The Company knows of no selling arrangement between any underwriter, agent or broker-dealer and the Selling Shareholders. The Selling Shareholders and any broker-dealers or agents that participate with the Selling Shareholders in the distribution of any of the Shares may be deemed to be "underwriters" within the meaning of the Securities Act of 1933, as amended (the "Securities Act"), and any discount or commission received by them and any profit on the resale of the Shares purchased by them may be deemed to be underwriting discounts or commissions under the Securities Act. The date of this Prospectus is June __, 1996 AVAILABLE INFORMATION The Company is subject to the informational requirements of the Securities Exchange Act of 1934, as amended (the "Exchange Act") and in accordance therewith files reports, proxy statements and other information with the Commission. Reports, proxy statements and other information filed by the Company can be inspected and copied at the public reference facilities maintained by the Commission at Room 1024, 450 Fifth Street, N.W, Washington, D.C. 20549 and at the Commission's Regional Offices at Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661 and Seven World Trade Center, Suite 1300, New York, New York 10048. Copies of such material can be obtained at prescribed rates from the Public Reference Branch of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. The Company has filed with the Commission a registration statement on Form S-3 (the "Registration Statement") under the Securities Act with respect to the Common Stock offered hereby. This Prospectus does not contain all the information set forth in the Registration Statement, certain portions of which have been omitted as permitted by the rules and regulations of the Commission. Statements contained in this Prospectus as to the contents of any contract or other document are not necessarily complete, and in each instance reference is made to the copy of such contract or other document filed or incorporated by reference as an exhibit to the Registration Statement, each such statement being qualified in all respects by such reference and the exhibits and the schedules thereto. For further information pertaining to the Company or the Common Stock offered hereby, reference is made to the Registration Statement and such exhibits and schedules thereto, which may be inspected without charge at, and copies thereof may be obtained at prescribed rates from, the Public Reference Branch of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE This Prospectus incorporates documents by reference which are not presented herein or delivered herewith, as indicated below. The Company will provide without charge to each person to whom a copy of this Prospectus has been delivered, on the written or oral request of such person, a copy of any or all of the documents referred to below which are incorporated herein by reference (other than exhibits to such documents unless they are specifically incorporated by reference into such documents). Requests for such copies should be directed to Corporate Secretary, PDT, Inc., 7408 Hollister Avenue, Santa Barbara, California 93117; telephone number (805) 685-9880. The following documents filed with the Commission by the Company under File No. 0-25544 pursuant to the Exchange Act are incorporated herein by reference: the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 1995 (as amended on Form 10-K/A-1 filed April 23, 1996 and on Form 10-K/A-2 filed April 24, 1996); the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 1996 and the description of the Company's Common Stock as contained in Item 1 of the Company's Registration Statement on Form 8-A filed February 9, 1995. All documents filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act on or after the date of this Prospectus and prior to the termination of the offering of the Common Stock offered hereby shall be deemed to be incorporated by reference herein and to be a part hereof from the date of filing of such documents. See "Available Information." Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Prospectus to the extent that a statement contained herein or in any subsequently filed document incorporated or deemed to be incorporated herein by reference, which statement is also incorporated herein by reference, modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Prospectus. THE COMPANY PDT, Inc. ("PDTI" or the "Company") is engaged in the integrated development of drug and medical device products for use in photodynamic therapy. Photodynamic therapy is a medical procedure which uses light-activated (photoreactive) drugs, light producing devices and light delivery devices to achieve selective photochemical destruction of diseased cells. The Company believes that photodynamic therapy has the potential to be a safe, cost-effective, minimally invasive primary or adjunctive treatment for indications in a broad number of disease areas including oncology, ophthalmology, urology, dermatology, gynecology and cardiology. PDTI is conducting Phase III clinical trials for two indications in the oncology area; is preparing to initiate Phase III clinical trials for a third indication in the oncology area; is conducting a Phase I/II clinical trial in the ophthalmology area; is preparing to initiate three Phase I/II clinical trials in the urology, oncology and dermatology areas; and is conducting preclinical studies in oncology, ophthalmology, gynecology and cardiology. All of the Company's clinical trials are testing PDTI's leading drug candidate, tin ethyl etiopurpurin ("SnET2"). PDTI is developing products in collaboration with its corporate partners, a subsidiary of Pharmacia & Upjohn, Inc. (together with certain other subsidiaries, "Pharmacia & Upjohn"), Boston Scientific Corporation ("Boston Scientific"), Cordis Corporation, a Johnson & Johnson company ("Cordis") and Iridex Corporation, ("Iridex"). Photodynamic therapy typically involves the intravenous injection of a photoreactive drug followed by the application of light of a specific wavelength which activates the drug. When exposed to the appropriate light wavelength, SnET2 acts as a catalyst to generate a highly reactive form of oxygen which destroys the membranes of the cells containing the drug. Importantly, neither SnET2 nor light alone can produce the photodynamic reaction. After administration, SnET2 is absorbed by cells throughout the body. The drug begins to clear from normal cells after several hours but is retained by hyperproliferating cells for up to several days. As a result, photodynamic therapy can be used to selectively destroy diseased or undesirable cells in two ways: (i) drug selectivity-hyperproliferating cells such as in a cancer tumor can be selectively destroyed by allowing the drug to clear from non-target cells before delivering light to the general area; and (ii) light selectivity-in conditions such as certain eye disorders, tissues can be selectively destroyed by precisely delivering the light to discrete areas before the drug has cleared. The Company believes that this selectivity may offer advantages over existing chemotherapy, radiation therapy and surgery treatments, which can damage both normal and abnormal tissues. PDTI is developing all three components of photodynamic therapy: photoreactive drugs, light producing devices and light delivery devices. The Company believes that by integrating the development of drugs and devices, it can produce easy-to-use photodynamic therapy systems which offer the potential for predictable and consistent results. SnET2 is synthetic, clears from the body in days and is activated by a wavelength of light that can be produced using semiconductor diode technology. In contrast to PDTI's synthetic drugs, certain competing compounds used in photodynamic therapy have one or more of the following drawbacks: they may be complex mixtures derived from blood or plant sources and may yield inconsistent results; they may produce a relatively severe sensitivity to light for up to several weeks; or they may react only to light wavelengths which require the use of large, expensive and difficult-to-maintain laser systems. PDTI is collaborating with its partner Pharmacia & Upjohn in the worldwide development and commercialization of SnET2. In conjunction with its partners Boston Scientific and Cordis, PDTI is developing and testing medical catheters which incorporate specialized light diffusers and measurement devices. PDTI is collaborating with Iridex in the development of light-producing devices for photodynamic therapy in the field of ophthalmology. In late 1995, PDTI completed two Phase I/II clinical trials. One trial involved 46 patients with a total of 418 tumors and tested SnET2 for the local treatment of nonmelanoma skin cancers including basal cell carcinoma, basal cell nevus syndrome and metastatic breast cancer involving the skin. The other trial involved 45 patients with a total of 404 tumors and tested SnET2 for the local treatment of AIDS-related Kaposi's Sarcoma ("KS"). These studies assessed the safety of the drug and evaluated responses to various drug and light doses. In each of these trials, treatment was found to be well tolerated, with minimal side effects. In the Phase II portion of these trials, evaluable tumor responses were as follows: 100% of the basal cell carcinomas had complete responses; 95% of the basal cell nevus tumors responded, 86% of which were complete responses; 100% of the metastatic breast tumors involving the skin responded, 96% of which were complete responses; and 62% of the KS tumors which were given the higher of two light doses responded, 64% of which were complete responses. A complete response was defined as no visible or palpable evidence of tumor remaining for at least four weeks. The foregoing data are subject to change as a result of the continuing evaluation of patient data and are not definitive inasmuch as Phase III clinical trials are required to determine the safety and efficacy of the Company's products. The Company commenced Phase III clinical trials in March 1996 for the local treatment of KS and metastatic breast cancer involving the skin and, based on clinical results and after review with the FDA, the Company plans to begin enrolling patients in Phase III clinical trials for basal cell carcinoma in 1996. PDTI's objective is to develop and commercialize its photodynamic therapy systems for use as adjunct or primary treatments. The key elements of the Company's strategy include: (i) integrating photoreactive drugs, light producing devices and light delivery devices into easy-to-use, cost-effective clinical treatment systems; (ii) initially targeting high-incidence or serious diseases for which there is no satisfactory alternative treatment or which may offer accelerated regulatory processes; and (iii) collaborating with industry-leading corporate partners which can assist the Company in expanding the number of target applications and expediting the development and marketing of its products. On April 30, 1996, the Company closed its offering of 1,500,000 shares of Common Stock. The underwriters for such offering elected not to exercise an option to purchase an additional 225,000 shares of Common Stock granted by the Company in connection therewith. PDTI was incorporated in Delaware in 1989. The Company's executive offices and the offices of its three subsidiaries, PDT Pharmaceuticals, Inc., PDT Systems, Inc. and PDT Cardiovascular, Inc., are located at 7408 Hollister Avenue, Santa Barbara, California 93117. The Company's telephone number is (805) 685-9880. Unless otherwise indicated, all references to the Company and PDTI include PDTI and its subsidiaries. RISK FACTORS An investment in the Common Stock offered hereby involves a high degree of risk. Prospective investors should carefully consider the following risk factors, together with the other information contained in this Prospectus, in evaluating the Company and its business before purchasing the shares offered hereby. In particular, prospective investors should note that this Prospectus contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, which involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company, or industry results, to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. The factors listed below represent certain important factors the Company believes could cause such results to differ. These factors are not intended to represent a complete list of the general or specific risks that may affect the Company. It should be recognized that other risks may be significant, presently or in the future, and the risks set forth below may affect the Company to a greater extent than indicated. EARLY STAGE OF THE COMPANY AND ITS PRODUCTS The Company and its products are in an early stage of development. No revenues have been generated from sales of the Company's drugs and only limited revenues have been generated from sales of the Company's devices. The Company does not expect to achieve significant levels of revenues for at least several years. The Company's revenues to date have consisted, and for the foreseeable future are expected to consist, principally of grants awarded and payments for its devices which are purchased by others engaged in preclinical and clinical testing and research of photodynamic therapy drugs or by companies that distribute the devices and payments under research and development agreements, license fees, royalties and interest income. To achieve profitable operations on a continuing basis, the Company, alone or with collaborative partners, must successfully research, develop, test, obtain regulatory approval for, manufacture, introduce, market and distribute its products. The time frame necessary to achieve these goals for any individual product is long and uncertain. Most of the products currently under development by the Company will require significant additional research and development, preclinical and clinical testing and regulatory approval prior to commercialization. There can be no assurance that the Company's research or product development efforts or those of its collaborative partners will be successfully completed, that the drugs or devices currently under development will be successfully transformed into marketable products, that required regulatory approvals can be obtained, that products can be manufactured at an acceptable cost and with appropriate quality, that any approved products can be successfully marketed, or that any products that may be marketed will be favorably accepted. The likelihood of the Company's success must be considered in light of these and other problems, expenses, difficulties, complications and delays frequently encountered in connection with the formation of a new business and the development and commercialization of new products, particularly pharmaceutical and medical device products. HISTORY OF LOSSES; UNCERTAINTY OF FUTURE PROFITABILITY The Company has generated little revenue to date, has experienced operating losses since its inception in 1989 and has not yet achieved profitability. As of December 31, 1995, the Company had an accumulated deficit of approximately $34.5 million. These losses have resulted primarily from the Company's research and development programs, the funding of preclinical and clinical testing and regulatory activities and the general and administrative expenses associated with these activities. The Company anticipates incurring substantial and increasing losses over at least the next several years. The extent of losses and the time required to reach profitability are highly uncertain. To achieve sustained profitable operations, the Company, alone or with collaborative partners, must successfully research, develop, test, obtain regulatory approval, manufacture, introduce, market and distribute its products. There can be no assurance that the Company will be able to achieve profitability or that profitability, if achieved, can be sustained on an ongoing basis. Moreover, if profitability is achieved, the level of that profitability cannot be accurately predicted. UNPROVEN SAFETY AND EFFICACY; CLINICAL TRIALS All drug and device products currently under development by the Company will require extensive preclinical and clinical testing prior to regulatory approval for commercial use. None of the Company's products have completed testing for efficacy or safety in humans. There can be no assurance that such testing will demonstrate that SnET2 or any other of the Company's products is safe or efficacious or that testing for any of the Company's compounds currently under development will be completed successfully within any specified time period, if at all. Further, there can be no assurance that clinical data reported by the Company will not change as a result of the continuing evaluation of patients. Data obtained from preclinical and clinical trials are subject to varying interpretations which can delay, limit or prevent approval by the U.S. Food and Drug Administration (the "FDA") or other regulatory authorities. There can be no assurance that the Company will not encounter Problems in research and development, preclinical testing or clinical trials that will cause the Company to delay, suspend or cancel clinical trials. Many potential pharmaceutical and medical device products that achieve promising results in preclinical tests and clinical trials fail to demonstrate sufficient safety or efficacy to warrant approval by the FDA or other regulatory authorities, and there can be no assurance that any of the Company's potential products will obtain the required approvals or, if approved, will obtain sufficient market acceptance to become commercially successful. To date, the Company has very limited experience in conducting clinical trials. The Company will either need to rely on third parties, including its collaborative partners, to design and conduct any required clinical trials or expend resources to hire additional personnel to administer such clinical trials. There can he no assurance that the Company will be able to find appropriate third parties to design and conduct clinical trials or that it will have the resources to hire personnel to administer clinical trials in-house. RELIANCE ON COLLABORATIVE PARTNERS The Company has entered into collaborative relationships with certain corporations and academic institutions in connection with the research and development, preclinical and clinical testing, licensing, manufacturing and distribution of its products. In July 1995, the Company entered into a collaborative agreement with Pharmacia & Upjohn pursuant to which the Company granted to Pharmacia & Upjohn an exclusive worldwide license to use, distribute and sell SnET2 for therapeutic or diagnostic applications in the area of photodynamic therapy. SnET2 is the only drug being developed by the Company that currently is in clinical trials. Pursuant to this agreement, Pharmacia & Upjohn is responsible for conducting certain aspects of clinical trials involving SnET2 and is obligated to reimburse the Company for certain expenses incurred by the Company for clinical trials conducted by the Company involving SnET2. Under the agreement, the Company is entitled to royalties on the sale of SnET2 as well as payments upon the achievement of certain milestones. The amount of royalty revenues and other payments, if any, ultimately received by the Company with respect to sales of SnET2 is dependent, in part, on the amount and timing of resources Pharmacia & Upjohn commits to research and development, clinical testing and regulatory and marketing activities, which are entirely within the control of Pharmacia & Upjohn. The resources committed by Pharmacia & Upjohn in these areas will depend on Pharmacia & Upjohn's own competitive, marketing and strategic considerations, including the relative advantages of alternative products or therapies developed and marketed by Pharmacia & Upjohn or competitors. There can be no assurance that Pharmacia & Upjohn will pursue the development and commercialization of SnET2 or that Pharmacia & Upjohn will perform its obligations as expected. In addition, the Company is collaborating with Boston Scientific and Cordis with respect to the development of medical catheters for use in photodynamic therapy. The Company has not entered into any definitive agreement with either of these companies and there can be no assurance that any definitive agreement will be executed. In addition, the Company has entered into a collaborative agreement with Iridex for the co-development and distribution of light devices for use in photodynamic therapy in the field of ophthalmology. There can be no assurance that any of the Company's collaborations will culminate in marketable products or will otherwise be successful. In addition, the Company is currently at various stages of discussions with other companies regarding the establishment of various collaborations. The Company's current and future collaborations are important to the Company because they allow the Company greater access to funds, to research, development or testing resources and to manufacturing, sales or distribution resources than would otherwise have, and the Company intends to continue to rely on such collaborative arrangements. However, there can be no assurance that the Company will be able to negotiate acceptable collaborative arrangements in the future or that such future or existing collaborative arrangements will be successful. In addition, there can be no assurance that such collaborative relationships will not limit or restrict the Company in any way. Further, there can be no assurance that the Company's collaborative partners will not develop or pursue alternative technologies either on their own or in collaboration with others, including the Company's competitors, as a means of developing or marketing products for the diseases targeted by the collaborative programs and the Company's products. ADDITIONAL FINANCING REQUIREMENTS AND UNCERTAINTY OF CAPITAL FUNDING The Company has incurred negative cash flows from operations since its inception and has expended substantial funds in connection with its research and development programs and preclinical and clinical testing. The Company will require substantial funding to continue or undertake its research and development activities, preclinical and clinical testing and manufacturing, marketing, sales, distribution and administrative activities. There can be no assurance that the Company's existing capital resources, together with the proceeds from this offering and future cash flows, will be sufficient to fund the Company's future operations. The Company's capital requirements will depend on numerous factors, including the progress and magnitude of the Company's research and development programs and preclinical and clinical testing, the time involved in obtaining regulatory approvals, the cost involved in filing and maintaining patent claims, technological advances, competitive and market conditions, the ability of the Company to establish and maintain collaborative arrangements, the cost of manufacturing scale-up and the cost and effectiveness of commercialization activities and arrangements. Other than a $1.0 million bank credit line, the Company does not currently have any committed sources of financing. The Company has raised funds in the past through the public and private sale of securities, including its April 1996 offering, and contemplates raising funds in the future through public or private financings, collaborative arrangements or from other sources. The success of such efforts will depend in large part upon continuing developments in the Company's preclinical and clinical testing. The Company continues to explore and, as appropriate, enters into discussions with other companies regarding the potential for equity investment, collaborative arrangements, license agreements or development or other funding programs with the Company in exchange for manufacturing, marketing, distribution or other rights to products developed by the Company. However, there can be no assurance that discussions with other companies will result in any investments, collaborative arrangements, agreements or funding or that the necessary additional financing through debt or equity financing will be available to the Company on acceptable terms, if at all. Further, there can be no assurance that any arrangements resulting from these discussions will successfully reduce the Company's funding requirements. In addition, the terms and price of any such financings may be significantly more favorable to investors than those in this offering, which could have the effect of diluting or otherwise materially adversely affecting the holdings or the rights of existing shareholders of the Company, including purchasers acquiring Common Stock in this offering. If additional funding is not available to the Company when needed, the Company will be required to scale back its research and development programs, preclinical and clinical testing and administrative activities, and the Company's business and financial condition would be materially adversely affected. COMPETITION AND TECHNOLOGICAL UNCERTAINTY The pharmaceutical and medical device industries are characterized by extensive world-wide research and development efforts and rapid technological change. Competition from other domestic and foreign pharmaceutical or medical device companies and research and academic institutions in the areas of product development, product and technology acquisition, manufacturing and marketing is intense and is expected to increase. These competitors may succeed in obtaining approval from the FDA or other regulatory agencies for their products more rapidly than the Company. Competitors have also developed or are in the process of developing technologies that are, or in the future may be, the basis for competitive products. The Company is aware of five competitors involved in the development of photodynamic therapy drugs: QLT PhotoTherapeutics ("QLT") (Canada), Nippon Petrochemicals ("Nippon") (Japan), Scotia Pharmaceuticals ("Scotia") (United Kingdom), DUSA Pharmaceuticals ("DUSA") (Canada and USA) and Pharmacyclics, Inc. ("Pharmacyclics") (USA). The Company understands that QLT's drug Photofrin(R) has received marketing approval in the United States, Canada, the Netherlands and Japan for various specific disease indications. Further, the Company understands that QLT, Nippon, Scotia, DUSA and Pharmacyclics are conducting preclinical and/or clinical testing in various countries and for a variety of disease indications. In addition, the Company is aware of two competitors active in the commercialization of photodynamic therapy devices (Coherent Inc. and Laserscope). Both Coherent Inc. and Laserscope entered into collaborative agreements with QLT in 1994 to develop photodynamic devices for use with QLT's drugs. These and other companies may also be involved in competitive activities of which the Company is unaware. The Company's competitive position may be materially adversely affected by product developments or approvals in photodynamic therapy or other technologies which have already been achieved, or which may be achieved in the future, by these or other companies. Further, the prior development and commercialization of a pharmaceutical or medical device product has often resulted in a competitive advantage in that area. The Company's competitors may have substantially greater financial, technical and human resources than the Company and substantially greater experience in developing products, conducting preclinical or clinical testing, obtaining regulatory approvals and manufacturing and marketing. Further, the Company's competitive position could be materially adversely affected by the establishment of patent protection by its competitors. There can be no assurance that the Company's competitors will not succeed in developing technologies and products that are more effective or affordable than those being developed by the Company or that would render the Company's technology and products less competitive or obsolete. The Company's products are subject to the risks of failure inherent in the development and testing of products based on innovative technologies. These risks include the possibilities that this technology or any or all of the Company's products may be found to be ineffective or to have unanticipated limitations or otherwise fail. GOVERNMENT REGULATION The production and marketing of the Company's products and its ongoing research and development, preclinical testing and clinical trial activities are subject to extensive regulation and review by numerous governmental authorities in the United States, including the FDA, and in other countries. All drugs and most medical devices developed by the Company must undergo rigorous preclinical and clinical testing and an extensive regulatory approval process administered by the FDA under the Food, Drug, and Cosmetic Act, as amended (the "FDC Act"), and comparable foreign authorities before they can be marketed. These processes involve substantial cost and can take many years. The Company has limited experience in, and limited resources available to commit to, regulatory activities. Failure to comply with the applicable regulatory requirements can, among other things, result in non-approval, suspensions of regulatory approvals, fines, product seizures and recalls, operating restrictions, injunctions and criminal prosecution. The time required for completing such testing and obtaining such approvals is uncertain and approval itself may not be obtained. In addition, delays or rejections may be encountered due to, among other reasons, regulatory review of each submitted new drug, device or combination drug/device application or product license application, as well as changes in regulatory policy during the period of product development. Similar delays may also be encountered in foreign countries. To date, no pharmaceutical product candidate being developed by the Company has been submitted for approval or has been approved by the FDA or any other regulatory authority for marketing, and there can be no assurance that, even after investing substantial time and expense, regulatory approval will be obtained for any products developed by the Company. Moreover, if regulatory approval of a product is granted, such approval may entail limitations on the indicated uses for which the product may be marketed. Further, even if such regulatory approval is obtained, a marketed product, its manufacturer and the facilities in which the product is manufactured are subject to continual review and periodic inspections. Later discovery of previously unknown problems with a product, manufacturer or facility may result in restrictions on such product or manufacturer, including withdrawal of the product from the market and litigation. Although to date photodynamic therapy products have been categorized by the FDA as combination drug/device products, there can be no assurance that PDTI's products currently under investigation or any future drug/device products will continue to be categorized for regulatory purposes as combination products, that they will not require separate drug and device submissions, or that they will not require separate approval by regulatory authorities. LIABILITY AND RECALL EXPOSURE The use of the Company's products in clinical trials and the sale of such products may expose the Company to liability claims. These claims could be made directly by patients or consumers or by companies, institutions or others using or selling such products. In addition, the Company is subject to the inherent risk that a government authority or third party may require the recall of one or more of the Company's products. The Company has not obtained liability insurance that would cover a claim relating to the use or recall of its products. In the absence of such insurance, claims made against the Company or a product recall could have a material adverse effect on the Company. In addition, there can be no assurance that, if the Company seeks insurance coverage in the future, such coverage will be available at reasonable cost and in amounts sufficient to protect the Company against claims that could have a material adverse effect on the financial condition and prospects of the Company. Further, liability claims relating to the use of the Company's products or a product recall could negatively affect the Company's ability to obtain or maintain regulatory approvals for its products. The Company has agreed to indemnify certain of its collaborative partners against certain potential liabilities relating to the manufacture and sale of SnET2 and photodynamic therapy light devices. POSSIBLE ADVERSE EFFECTS OF FUTURE LEGISLATION OR REGULATIONS Heightened public awareness and concerns regarding the growth in overall health care expenditures in the United States, combined with the continuing efforts of governmental authorities to contain or reduce costs of health care, may result in the enactment of national health care reform or other legislation or regulations that impose limits on the number and type of medical procedures which may be performed or which have the effect of restricting a physician's ability to select specific products for use in certain procedures. Such new legislation or regulations may materially adversely affect the demand for the Company's products. In the United States, there have been, and the Company expects that there will continue to be, a number of federal and state legislative proposals and regulations to implement greater governmental control in the health care industry. For example, the Clinton Administration and certain members of Congress have proposed health care reform legislation that may impose pricing or profitability limitations or other restrictions on companies in the health care industry. The announcement of such proposals may materially adversely affect the Company's ability to raise capital or to form collaborations, and the enactment of any such reforms could have a material adverse effect on the Company. In certain foreign markets, the pricing and profitability of health care products are subject to governmental influence or control. In addition, legislation or regulations that impose restrictions on the price that may be charged for health care products or medical devices may adversely affect the Company's results of operations. From time to time, legislation or regulatory proposals are considered that could alter the review and approval process relating to pharmaceutical or medical device products. The Company is unable to predict the likelihood of adverse effects which might arise from future legislative or administrative action, either in the United States or abroad. REIMBURSEMENT The Company's ability to commercialize its products successfully may depend in part on the extent to which reimbursement for such products and related treatment will be available from government health administration authorities, private health insurers, managed care entities and other organizations. Such payers are increasingly challenging the price of medical products and services and establishing protocols and formularies which effectively limit physicians' ability to select products and procedures. Uncertainty exists as to the reimbursement status of health care products (especially innovative technologies), and there can be no assurance that adequate reimbursement coverage will be available to enable the Company to achieve market acceptance of its products or to maintain price levels sufficient for realization of an appropriate return on its products. LIMITED MANUFACTURING AND MARKETING CAPABILITY AND EXPERIENCE To be successful, the Company's products must be manufactured in commercial quantities under current Good Manufacturing Practices ("GMP") prescribed by the FDA and at acceptable costs. Although the Company intends to manufacture drugs and devices, the Company has not yet manufactured any products in commercial quantities under GMP and has no experience in such commercial manufacturing. The Company will need to expand its manufacturing capabilities and/or depend on its collaborators, licensees or contract manufacturers for the commercial manufacture of its products. In the event the Company determines to expand its manufacturing capabilities, it will require the expenditure of substantial funds, the hiring and retention of significant additional personnel and compliance with extensive regulations applicable to such expansion. There can be no assurance that the Company will be able to expand such capabilities successfully or that it will be able to manufacture products in commercial quantities for sale at competitive prices. Further, there can be no assurance that the Company will be able to enter into manufacturing arrangements with collaborators, licensees, or contract manufacturers on acceptable terms or at all. If the Company is not able to expand its manufacturing capabilities or enter into additional commercial manufacturing agreements, it could be materially and adversely affected. The Company has limited experience in marketing, distributing and selling pharmaceutical products, and will need to develop a sales force or rely on its collaborators or licensees or make arrangements with others to provide for the marketing, distribution and sale of its products. There can be no assurance that the Company's marketing, distribution and sales capabilities or current or future arrangements with third parties to perform such activities will be adequate for the successful commercialization of its products. UNCERTAINTY REGARDING PATENTS AND PROPRIETARY TECHNOLOGY The Company's success will depend, in part, on its and its licensors' ability to obtain, assert and defend its patents, protect trade secrets and operate without infringing the proprietary rights of others. The Company has filed applications for or has been issued U.S. and foreign patents, a majority of which relate to its light delivery and measurement devices, and the Company has an exclusive license under patent applications or patents of others relating to certain photoreactive compounds. Such issued U.S. patents expire from 2006 through 2014. Certain of the foregoing patents and patent applications are subject to certain governmental rights. The exclusive license to the Company under various drug patents, including patents relating to its leading drug candidate SnET2, provides that the licensors may elect that the license become non-exclusive if the Company fails to satisfy certain development and commercialization objectives. Although the Company believes it should be able to achieve such objectives, there can be no assurance that the Company will be successful. The patent position of pharmaceutical and medical device firms generally is highly uncertain and involves complex legal and factual questions. There can be no assurance that the patent applications owned by or licensed to the Company will result in issued patents, that any issued patents will provide the Company with proprietary protection or competitive advantages, will not be infringed upon or designed around by others, will not be challenged by others and held to be invalid or unenforceable or that the patents of others will not have a material adverse effect on the Company. The Company is aware that its competitors and other companies, institutions and individuals have been issued patents relating to photodynamic therapy. In addition, the Company's competitors and other companies, institutions and individuals may have filed patent applications or been issued patents relating to other potentially competitive products of which the Company is not aware. Further, the Company's competitors and other companies, institutions and individuals may in the future file applications for, or be granted or license or otherwise obtain proprietary rights to, patents relating to other potentially competitive products. There can be no assurance that these existing or future patents or patent applications will not conflict with the Company's or its licensors' patents or patent applications. Such conflicts could result in a rejection of the Company's or its licensors' patent applications or the invalidation of their patents, which could have a material adverse effect on the Company's competitive position. In the event of such conflicts, or in the event the Company believes that such competitive products may infringe the patents owned by or licensed to the Company, the Company may pursue patent infringement litigation or interference proceedings against, or may be required to defend against litigation involving, holders of such conflicting patents or competing products. Such proceedings may materially adversely affect the Company's competitive position, and there can be no assurance that the Company will be successful in any such proceeding. Litigation and other proceedings relating to patent matters, whether initiated by the Company or a third party, can be expensive and time consuming, regardless of whether the outcome is favorable to the Company, and can result in the diversion of substantial financial, managerial and other resources from the Company's other activities. An adverse outcome could subject the Company to significant liabilities to third parties or require the Company to cease any related research and development activities or product sales. The Company does not have contractual indemnification rights against the licensors of the various drug patents. In addition, if patents that contain dominating or conflicting claims have been or are subsequently issued to others and such claims are ultimately determined to be valid, the Company may be required to obtain licenses under patents or other proprietary rights of others. No assurance can be given that any licenses required under any such patents or proprietary rights would be made available on terms acceptable to the Company, if at all. If the Company does not obtain such licenses, it could encounter delays or could find that the development, manufacture or sale of products requiring such licenses is foreclosed. The Company also seeks to protect its proprietary technology and processes in part by confidentiality agreements with its collaborative partners, employees and consultants. There can be no assurance that these agreements will not be breached, that the Company will have adequate remedies for any breach, or that the Company's trade secrets will not otherwise become known or be independently discovered by competitors. Certain of the research activities relating to the development of certain of the patents owned by or licensed to the Company were funded, in part, by agencies of the United States government. When the United States government participates in research activities, it retains certain rights that include the right to use the resulting patents for government purposes under a royalty-free license. DEPENDENCE UPON KEY PERSONNEL AND CONSULTANTS The Company's ability to successfully develop its products, manage growth and maintain a competitive position will depend in large part on its ability to attract and retain highly qualified scientific, management and other personnel and to develop and maintain relationships with leading research institutions and consultants. The Company is highly dependent upon its Chairman, the principal members of its management, key employees, scientific staff and consultants which the Company may retain from time to time. Competition for such personnel and relationships is intense, and there can be no assurance that the Company will be able to continue to attract and retain such personnel. The Company's consultants may be affiliated or employed by others, and some have consulting or other advisory arrangements with other entities that may conflict or compete with their obligations to the Company. Inventions or processes discovered by such persons will not necessarily become the property of the Company and may remain the property of such persons or others. DEPENDENCE UPON SUPPLIERS The Company currently depends upon outside suppliers, contracted or otherwise, for certain raw materials and components for its products. There can be no assurance that such raw materials or components will continue to be available to the Company's standards or on acceptable terms, if at all, or that alternative suppliers will be available to the Company on acceptable terms, if at all. Further, there can be no assurance that the Company will be able to produce needed materials or components in-house in a timely manner or in sufficient quantities to meet the needs of the Company, if at all. Although most of the Company's raw materials and components are available from various sources, the Company is currently dependent on single, contracted sources for certain key materials or services used by the Company in its drug development and production operations. Although the Company has entered into agreements with these suppliers, there can be no assurance that these arrangements will be successful or that the Company will not encounter delays or other problems which may materially adversely affect its business. ENVIRONMENTAL MATTERS The Company is subject to federal, state, county and local laws and regulations relating to the protection of the environment. In the course of its business, the Company is involved in the handling, storage and disposal of materials that are classified as hazardous. The Company s safety procedures for handling, storage and disposal of such materials are designed to comply with the standards prescribed by applicable laws and regulations. However, there can be no assurance that the Company will not be involved in an accidental contamination or injury from these materials. In the event of such an accident, the Company could be held liable for any damages that result, and any such liability could materially and adversely affect the Company. Further, there can be no assurance that the cost of complying with these laws and regulations will not increase materially in the future. CONTROL BY OFFICERS AND DIRECTORS As of May 31, 1996 the Company's officers and directors beneficially owned approximately 38.8% of the outstanding Common Stock (approximately 40.9% if all options granted to such officers and directors become vested and are exercised). These shareholders will be able to elect a substantial number of the Company's directors and will have the ability to influence significantly the Company and the direction of its business and affairs. Such concentration of ownership may have the effect of delaying or preventing a change in control of the Company, which could adversely affect the market price for the Common Stock. DILUTION; OUTSTANDING OPTIONS, WARRANTS AND CONVERTIBLE NOTES The Company also contemplates future sales of Common Stock through public or private offerings that may effect a dilution to purchasers in this offering. As of May 31, 1996, there were outstanding options to purchase 2,200,168 shares of Common Stock at a weighted average exercise price or $12.56 per share, warrants to purchase 1,626,875 shares of Common Stock at a weighted average exercise price of $10.14 per share and convertible notes convertible into 10,625 shares of Common Stock at a conversion price of $8.00 per share. The exercise of these options and warrants and conversion of these convertible notes would result in significant book value and earnings dilution to purchasers of shares of Common Stock in this offering. Additionally, of the above-described options, options covering 427,500 shares of Common Stock vest upon achievement of specified milestones and consequently are treated as variable options under applicable accounting principles. These variable options could result in substantial compensation expense to the Company. In May 1996, the Board voted to lock-in the vesting dates of these variable options to reduce excessive deferred compensation expense in the future and referred the matter to the Compensation Committee to finalize the vesting dates of these variable options. SHARES ELIGIBLE FOR FUTURE SALE Future sales of Common Stock in the public market could materially adversely affect prevailing market prices and may have a material and adverse effect on the Company's ability to raise the capital necessary to fund its future operations. As of June 18, 1996, the Company had 12,387,957 shares of Common Stock outstanding. Of these shares, the 1,500,000 shares sold in the April 1996 offering, the 602,991 shares sold by the Company and selling shareholders in the Company's initial public offering in April 1995 and the 3,740,550 shares previously sold by shareholders under the registration statement filed in connection with the initial public offering or sold in reliance on Rule 144 under the Securities Act of 1933, as amended (the "Securities Act"), will be or are freely tradable without restriction or further registration under the Securities Act, unless purchased by affiliates of the Company. The remaining 6,506,430 shares (the "Restricted Shares") of Common Stock outstanding are "restricted securities" and may not be sold in a public distribution except in compliance with the registration requirements of the Securities Act or an applicable exemption under the Securities Act, such as Rule 144 or Rule 144A thereunder. Of these Restricted Shares, 3,117,023 shares are subject to 180-day lockup agreements with the underwriters for the April 1996 offering (the "Lockup Agreements"). As of June 18, 1996, 453,775 Restricted Shares not subject to the Lockup Agreements were eligible for sale in the public market under Rule 144 subject to the volume, manner of sale and other restrictions set forth in Rule 144, and 543,856 Restricted Shares were eligible for sale without restrictions pursuant to Rule 144(k). Upon expiration of the Lockup Agreements, an additional 3,117,023 Restricted Shares will be eligible for sale in the public market subject to the volume, manner of sale and other restrictions set forth in Rule 144. As of June 18, 1996, 3,827,043 shares were subject to outstanding options and warrants. The Lockup Agreements also cover options and warrants covering 1,115,001 shares. Upon expiration of the Lockup Agreements on October 27, 1996, the holders of options and warrants to purchase 918,751 shares will be vested and could exercise their options or warrants and sell these shares in compliance with Rule 701 or without restriction in the public market if the Company has filed a Registration Statement on Form S-8 covering such shares. Certain holders of shares of Common Stock are entitled to have their shares registered for sale under the Securities Act by the Company under certain circumstances. The exercise of these rights and the sale of such shares could have a material adverse effect on the market price for the Common Stock. POTENTIAL VOLATILITY OF STOCK PRICE; NO DIVIDENDS The market prices for securities of emerging pharmaceutical and medical device companies have historically been highly volatile. Future announcements concerning the Company or its collaborators, competitors or industry, including but not limited to the results of testing, technological innovations or new commercial products, the achievement of or failure to achieve certain milestones, governmental regulations, rules and orders, developments concerning patents or other proprietary rights, litigation or public concern about the safety of the Company's products, may have a material adverse effect on the market price of the Common Stock. In addition, the stock market has experienced extreme price and volume fluctuations. This volatility has significantly affected the market prices of securities of many emerging pharmaceutical and medical device companies for reasons frequently unrelated or disproportionate to the performance of the specific companies. These broad market fluctuations may materially adversely affect the market price of the Common Stock. The Company has never paid dividends, cash or otherwise, on its capital stock and does not anticipate paying any such dividends in the foreseeable future. The Company's bank credit line prohibits the payment of dividends on its Common Stock. SHARES BEING OFFERED On February 14, 1995, the Commission declared effective the Registration Statement of the Company relating to its initial public offering of 350,000 (525,000 as adjusted for the stock split) shares of Common Stock, the concurrent offering by shareholders of 51,994 (77,991 as adjusted for the stock split) shares of Common Stock and the registration for resale of 1,649,503 (2,474,254 as adjusted for the stock split) shares of Common Stock held by stockholders of the Company. The Company closed its initial public offering April 10, 1995. Of the additional 1,649,503 (2,474,254 as adjusted for the stock split) shares that were registered and that are not eligible for resale under Rule 144 promulgated under the Securities Act, 37,986 shares have not been sold. These shares constitute the Shares being offered for sale pursuant to this Prospectus. The names of the persons who currently hold the Shares and the number of Shares held by them are set forth under "Selling Shareholders" below. SELLING SHAREHOLDERS The following table sets forth certain information regarding the beneficial ownership of the Selling Shareholders of the Company's Common Stock as of May 31, 1996 and as adjusted to reflect the sale of the Common Stock offered by the Selling Shareholders hereby. Shares Owned Prior Shares Shares to be Owned Name of Beneficial Owner(1) to Offering Offered After Offering - --------------------------- ----------- ------- -------------- Number % ------ - Lee and Annette Aerenson 2,501 2,501 0 * Richard N. Angus(2) 3,126 3,126 0 * The Borggreve Family Limited Partnership(2) 4,168 4,168 0 * L. Edwards, Ph.D. and J. Macklin(3) 1,500 1,500 0 * Donald Jurow 5,100 5,100 0 * Harlan P. Kleiman(2) 3,150 3,150 0 * Ronald L. and Marion J. Maddox(2) 6,252 6,252 0 * Russell Meisinger(2) 7,500 7,500 0 * Victor F. and Joan B. Meyer(2) 1,563 1,563 0 * Jack Wilson DDS, IRA(2) 3,126 3,126 0 * - --------------------- * Less than 1%. (1) Each person has sole voting and investment power over the Common Stock shown as beneficially owned, subject to community property laws where applicable and the information contained in the footnotes below. (2) Excludes shares of Common Stock issuable upon exercise of options or warrants exercisable within 60 days of the date hereof as follows: Richard N. Angus--1,563 shares; The Borggreve Family Limited Partnership--3,126 shares; Harlan P. Kleiman--1,575 shares; Ronald L. and Marion J. Maddox--3,126 shares; Russell Meisinger--3,750 shares; Victor F. and Joan B. Meyer--782 shares; and Jack Wilson DDS, IRA--1,564 shares. (3) Dr. Edwards is a scientist for PDT Pharmaceuticals, Inc. PLAN OF DISTRIBUTION The Shares offered hereby are being offered by the Selling Shareholders. The Company will receive no proceeds from the sale of any of the Shares by the Selling Shareholders. The sale of the Shares may be effected by the Selling Shareholders from time to time in transactions on The Nasdaq National Market, in secondary or other distributions in accordance with the rules of The Nasdaq Stock Market, Inc. in negotiated transactions, or a combination of such methods of sale, at fixed prices which may be changed, at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices. The Selling Shareholders may effect such transactions by selling the Shares to or through broker-dealers, and such broker-dealers may receive compensation in the form of discounts, concessions or commissions from the Selling Shareholders and/or the purchasers of the Shares for whom such broker-dealers may act as agents or to whom they sell as principals, or both (which compensation as to a particular broker-dealer might be in excess of customary commissions). To the extent required, the number of Shares to be sold, the purchase price, the public offering price, if applicable, the name of any underwriter, agent or broker-dealer, and any applicable commissions, discounts or other items constituting compensation to such underwriters, agents or broker-dealers with respect to a particular offering will be set forth in an accompanying prospectus supplement. The aggregate proceeds to the Selling Shareholders from the sale of the Shares sold by the Selling Shareholders hereby will be the purchase price of such Shares less a broker's commission. There is no assurance that the Selling Shareholders will sell any or all of the Shares offered hereby. In order to comply with the securities laws of certain states, if applicable, the Shares will be sold in such jurisdictions only through registered or licensed brokers or dealers. In addition, in certain states the Shares may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with. If any Shares are sold in an underwritten offering, such Shares may be acquired by the underwriters for their own account and may be resold from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Unless otherwise indicated in the applicable prospectus supplement, the obligations of any underwriters to purchase Shares will be subject to certain conditions precedent, and the underwriters will be obligated to purchase all of the Shares specified in such prospectus supplement if any are purchased. Shares may be sold through a broker-dealer acting as agent or broker for the Selling Shareholders, or to a broker-dealer acting as principal. In the latter case, the broker-dealer may then resell such Shares to the public at varying prices to be determined by such broker-dealer at the time of resale. The Company has been advised by the Selling Shareholders that they have not, as of the date of this Prospectus, entered into any arrangement with an underwriter, agent or broker-dealer for the sale of the Shares. EXPERTS The consolidated financial statements of PDT, Inc. and subsidiaries at December 31, 1995 and 1994, and for each of the three years in the period ended December 31, 1995 incorporated by reference in this Prospectus and Registration Statement have been audited by Ernst & Young LLP, independent auditors as set forth in their report thereon appearing elsewhere herein, and are included in reliance upon such report given upon the authority of such firm as experts in accounting and auditing. The validity of the issuance of the Shares of Common Stock offered here by has been passed upon for the Company by Nida & Maloney, a professional corporation, Santa Barbara, California. Joseph E. Nida, a partner in Nida & Maloney, a professional corporation, owns 7,500 shares of Common Stock. ADDITIONAL INFORMATION The Prospectus does not contain all the information set forth in the Registration Statement, or amendments thereto, certain portions of which have been omitted pursuant to the Commission's rules and regulations. The information so omitted may be obtained from the Commission's principal office in Washington, D.C., upon payment of the fees prescribed by the Commission. The Delaware General Corporation Law and the Bylaws of the Company provide for indemnification of the Company's officers and directors. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling the Company pursuant to the foregoing provisions, the Company has been informed that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act, and is therefore unenforceable. - ------------------------- ------------------------- No person has been authorized to give any information or to make any representation other than those contained in this Prospectus or any prospectus supplement in connection with the offering described herein and, if given or made, such information or representation must not be relied upon as having been authorized by the Company. Neither the delivery of this Prospectus or any prospectus supplement nor any sale made hereunder shall, under any circumstances, create an implication PDT, INC. that the information contained or Common Stock incorporated by reference herein is correct as of any time subsequent to its date or that there has been no change in the affairs of the Company since such date. This Prospectus and any prospectus supplement do not constitute an offer to sell or a solicitation of an offer to buy any securities other than those specifically offered hereby or of any securities offered hereby in any jurisdiction in which such offer or solicitation is not authorized, or in which the person making such offer or solicitation is not qualified to do so, or to anyone to whom it is unlawful to make such offer or solicitation. TABLE OF CONTENTS Page ------- The Company........................ 3 Risk Factors....................... 4 Shares Being Offered............... 12 Selling Shareholders............... 13 Plan of Distribution............... 14 Experts............................ 14 Additional Information............. 14 PROSPECTUS June __, 1996 - ------------------------- ------------------------- PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION All of the expenses in connection with the distribution of the Shares are set forth below and will be borne by the Registrant. Registration Fee...................................................... $ 12,757 NASD Filing Fee........................................................ 4,200 Nasdaq Listing Fee..................................................... 10,000 Printing and Engraving Expenses........................................ 12,000 Blue Sky Fees and Expenses............................................. 5,000 Registrar and Transfer Agent Fees...................................... 1,000 Legal Fees and Expenses................................................ 100,000 Accounting Fees and Expenses........................................... 105,000 Miscellaneous......................................................... 5,000 *Total $254,957 ======== -------------------- * Fees and expenses include all initial public offering fees and expenses in connection with the initial registration on Form S-1 and the subsequent amendment on Form S-3. ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS Section 102(b)(7) of the Delaware General Corporation Law (the "Delaware Law") permits a corporation to provide in its certificate of incorporation that a directors of the corporation shall not be personally liable to the corporation or its shareholders 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 the corporation or its shareholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) for payments of unlawful dividends or unlawful stock repurchases or redemptions, or (iv) for any transaction from which the director derived an improper personal benefit. The Company's Certificate of Incorporate contains such a provision. Section 145 of the Delaware Law provides that a corporation may indemnify directors and officers as well as other employees and individuals against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement in connection with specified actions, suits or proceedings, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation- a "derivative action"), if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests of the corporation, and with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful. A similar standard is applicable in the case of derivative actions, except that indemnification only extends to expenses ( including attorneys' fees) incurred in connection with defense or settlement of such action, and the statute requires court approval before there can be any indemnification where the person seeking indemnification has been found liable to the corporation. Under Section 145, a corporation shall indemnify an agent of the corporation for expenses actually and reasonably incurred if and to the extent such person was successful on the merits in a proceeding or in defense of any claim, issue or matter therein. The Registrant is presently subject to Section 2115 of the California Corporations Code (the "California Code"), according to which Section 317 of the California Code applies to the indemnification of officers and directors of the Registrant. Under Section 317 of the California Code, permissible indemnification by a corporation of its officers and directors is substantially the same as permissible indemnification under Section 145 of the Delaware Law, except that (i) permissible indemnification does not cover actions the person reasonably believed were not opposed to the best interests of the corporation, as opposed to those the person believed were in fact in the best interests of the corporation, (ii) the Delaware Law permits advancement of expenses to agents other than officers and directors only upon approval of the board of directors, (iii) in a case of stockholder approval of indemnification, the California Code requires certain minimum votes in favor of such indemnification and excludes the vote of the potentially indemnified person, and (iv) the California Code only permits independent counsel to approve indemnification if an independent quorum of directors is not obtainable, while the Delaware Law permits the directors in any circumstance to appoint counsel to undertake such determination. The Registrant in its Bylaws has provided for indemnification of its officers, directors, employees and other agents substantially identical to that permitted under the California Code. Section 145 of the Delaware Law and Section 317 of the California Code provide that they are not exclusive of other indemnification that may be granted by a corporation's charter, bylaws, disinterested director vote, shareholder vote, agreement or otherwise. The limitation of liability contained in the Registrant's certificate of incorporation and the indemnification provision included in the Registrant's Bylaws are consistent with Delaware Law Sections 102(b)(7) and 145. The Registrant has also entered into separate indemnification agreements with its directors and officers that could require the Registrant, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors and officers and to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified, including liabilities that may arise under the Securities Act. In addition, the Company has purchased directors and officers insurance. Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers or persons controlling the Company pursuant to such provisions, the Company has been informed that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in such Act and is therefore unenforceable. The form of Selling Agreement filed as Exhibit 1.1 to this Registration Statement provides for the mutual indemnification of the Company and the selling agent, their respective controlling persons, director and certain of their officers, against certain liabilities, including liabilities under the Securities Act of 1933, as amended. ITEM 16. EXHIBITS See Exhibit Index at Page II-5. ITEM 17. UNDERTAKINGS (a) 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: (i) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933; (ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement; and (iii) 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; Provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed by the Registrant pursuant to section 13 or section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement. (2) That, for the purpose of determining any liability under the Securities Act of 1933, 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. (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. (4) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the Registrant's annual report pursuant to section 13(a) or 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. (b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, 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 pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in this 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. (c) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the provisions described under Item 15 above, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, 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, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, as amended, 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 Santa Barbara, State of California, on June 25, 1996. PDT, INC. By: _______________________________ Name: John M. Philpott Title: Chief Financial Officer and Controller Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons (which persons constitute a majority of the Board of Directors) in the capacities and on the dates indicated: Signature Title Date - --------- ----- ---- /s/ Gary S. Kledzik, Ph.D. Chairman of the Board and Chief June 25, 1996 - --------------------------- Executive Officer Gary S. Kledzik, Ph.D (principal executive officer) /s/ Daniel R. Doiron, Ph.D. Director and Vice President of June 25, 1996 - --------------------------- Daniel R. Doiron, Ph.D. Technology /s/ Michael D. Farney Director June 25, 1996 - --------------------------- Michael D. Farney /s/ Donald K. McGhan Director June 25, 1996 - --------------------------- Donald K. McGhan /s/ Raul E. Perez Director June 25, 1996 - --------------------------- Raul E. Perez /s. John M. Philpott Chief Financial Officer and June 25, 1996 - --------------------------- Controller (principal financial John M. Philpott officer and principal accounting officer) EXHIBIT INDEX Exhibit Description Filed (F) - ------- ----------- --------- 1.1 Form of Selling Agreement * 1.2 Form of Escrow Agreement * 1.3 Form of Selling Shareholder Power of Attorney, Questionnaire and Selling Agreement * 3.1 Restated Certificate of Incorporation filed with the Delaware Secretary of State on December 14, 1994 * 3.2 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of July 24, 1995 ** 3.3 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of March 17, 1994 * 3.4 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of October 7, 1992 * 3.5 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of November 21, 1991 * 3.6 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of September 27, 1991 * 3.7 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of December 20, 1989 * 3.8 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of August 11, 1989 * 3.9 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of July 13, 1989 * 3.10 Certificate of Amendment of the Certificate of Incorporation filed with the Delaware Secretary of State of June 16, 1989 * 3.11 Bylaws * 4.1 Specimen Certificate of Common Stock * 4.3 Form of Convertible Promissory Note * 4.4 Form of Indenture * 4.5 Special Registration Rights Undertaking * 4.6 Undertaking Agreement dated August 31, 1994 * 4.7 Letter Agreement dated March 10, 1994 * 4.8 Form of $10,000,000 Common Stock and Warrants Offering Investment Agreement * 5.1 Opinion of Nida & Maloney * 21.1 Subsidiaries of the Registrant * 23.1 Consent of Ernst & Young LLP F 23.2 Consent of Nida & Maloney (included in Exhibit 5.1) * - -------------- * Previously filed with this Registration Statement. ** Incorporated by reference from the Registrant's Registration Statement on Form S-3, Commission File No. 333-1786.