Dogwood Therapeutics, Inc.

Our Company

We are a pre-revenue, development-stage biopharmaceutical company focused on developing new medicines to treat pain and neuropathy. Following the closing of the Combination described below, we became the sole owner of Pharmagesic (Holdings) Inc. (“Pharmagesic”) and their wholly owned subsidiary, Wex Pharmaceuticals, Inc. (“Wex”), and Wex’s wholly owned subsidiaries, IWT Bio, Inc. (“IWT”), Wex Medical Corporation (“WMC”), and Wex Medical Limited (“WML”).

Our pipeline is focused on treating chronic neuropathic pain and neuropathy. Our Halneuron® Nav 1.7 modulation program is intended to treat chronic and acute pain disorders. Our recently licensed SP16 program is centered on a cell signaling molecule that has shown early promise in treating neuropathy and nerve damage. The Halneuron® program is a proprietary non-opioid Nav 1.7 analgesic program centered on voltage-gated sodium channel modulation, a mechanism known to be effective for reducing pain. SP16 is the focus of a planned Phase 1b study that is fully funded through a research grant supplied by the National Cancer Institute, with patient enrollment projected to start in mid-2026.

Nav1.7 Non-Opioid Analgesic Program

Our lead product candidate, Halneuron®, is in late-stage clinical development for the treatment of chemotherapy-induced neuropathic pain (“CINP”). The active pharmaceutical ingredient is highly purified Tetrodotoxin (“TTX”), a potent sodium channel modulator found in puffer fish and several other marine animals. Halneuron® works as an analgesic by modulating the activity of Nav 1.7, a key sodium channel involved in pain signal transmission. By reducing the activity of the Nav 1.7 channel, Halneuron® has the potential to reduce pain associated with conditions involving neuropathic pain.

Mechanism of Action

Pain signals are transmitted as electrical nerve impulses that travel along a nerve. An electrical impulse is generated when the nerve cell depolarizes, triggering what is known as an action potential. This depolarization is triggered by an inflow of sodium ions through specific ion channels on the surface of the cell membrane. Halneuron® is known to bind to the Nav 1.7 sodium ion pore found on nociceptive pain fibers in a highly selective manner, reducing the inflow of sodium ions, and thereby reducing the propagation of pain signals.

As shown below, the mechanism via which Halneuron® exerts its analgesic properties is thought to be related to the product’s ability to stabilize neuronal membranes by inhibiting the Na+ ionic fluxes required for membrane depolarization.

Background of Chemotherapy Induced Neuropathic Pain (CINP)

Different pathophysiologic mechanisms are responsible for the development of chronic pain disorders. Pain pathways are triggered in part by ectopic discharges of voltage-sensitive sodium channels containing neurons, which are in abundance in both the peripheral and central nervous systems.

CINP is a side effect of many chemotherapeutic agents, including vincristine, paclitaxel, cisplatin, oxaliplatin, bortezomib, and ixabepilone. In one review, chemotherapy induced peripheral neuropathy was found to commonly occur in 30 to 40% of patients. More recently, prevalence was reported to be 68.1% (57.7-to 78.4) within the first month of the end of chemotherapy, 60.0% (36.4-81.6) at 3 months and 30.0% (6.4-53.5) at 6 months or later in a meta-analysis of 31 studies. Considerable heterogeneity is observed in the estimates from different studies. Breaking this down by type of chemotherapy, the incidence was 28% to 100% for cisplatin, 85% to 95% for oxaliplatin, 57% to 83% for paclitaxel, and 11% to 64% for docetaxel. In response to the development of peripheral neuropathy, chemotherapy dosing is often either decreased or discontinued, potentially affecting prognosis, and survival.

The CINP Market Opportunity

Peripheral neuropathic pain is an aspect of peripheral neuropathy, and there is an unmet medical need for treatment of patients who develop CINP.

Common side effects of cancer chemotherapy include fever, fatigue, infection, hair loss, and both acute and chronic pain. Chemotherapy with agents in the platinum/taxane classes are estimated to be responsible for 70% of CINP cases. Approximately one-in-three CINP patients exhibit neuropathic pain six months following

treatment, which are classified by patients as being mild, moderate or severe in intensity. There are currently no treatments approved by the U.S. Food and Drug Administration (the “FDA”) for any type of CINP.

Today, opioids account for over 30% of the global CINP treatment market. There are approximately 1.7 million CINP patients in just the 7 major markets alone (the US, Japan, the United Kingdom Germany, Spain, Italy, and France). With the potential of Halneuron® being the first FDA approved treatment for CINP, the global opportunity for Halneuron® is significant. Currently, our market research indicates that the CINP drug market is approximately $2.8 billion annually according to DelveInsight 2018. Allied Market Research estimates the larger cancer related pain market reaching approximately $7.5 billion in yearly sales by 2027. Chemotherapy treatment is expected to increase by over 50% over the next decade, suggesting the unmet medical need and the commercial opportunity will continue to grow for the foreseeable future.

Halneuron® Research Program Background

Cancer Related Pain Program

In the Company’s previous Phase 2 study in cancer related pain treatment, 165 cancer related pain patients were enrolled at 19 sites, and 77 (46.7%) of these patients were randomly assigned to the Halneuron® arm, or group, and 88 (53.3%) patients were assigned to the placebo arm. In total, 147 (89.1%) patients completed the study, including 64 (83.1%) in the Halneuron® arm and 83 (94.3%) in the placebo arm. An analysis of pain reduction in this study demonstrated a statistical and clinically relevant benefit of Halneuron® compared to placebo on the pre-specified pain intensity reduction endpoint. More specifically, 51% of patients receiving Halneuron® experienced at least a 30% reduction in pain versus only 35% of patients in the placebo group. Halneuron® treated patients reported two-times greater improvement in their global health improvement as compared with placebo treated patients, and Halneuron® treated patients also demonstrated a durable pain reduction response. After 4 days of initial treatment, the patients who met the pain reduction response criteria at the primary endpoint from either arm were monitored to assess how long their pain reduction lasted without further treatment. The average pain response duration for Halneuron® responders was 57.7 days vs 10.5 days for those responders treated with placebo.

In the Halneuron® group, all patients (100%) experienced at least 1 treatment-emergent adverse event (“TEAE”) considered related to the study drug while 77 patients (88%) in the placebo group reported at least 1 TEAE related to the study drug. The most common TEAEs and study drug-related TEAEs involved the gastrointestinal system, including nausea, oral hypoaesthesia (numbness), oral paraesthesia (tingling), and vomiting. Adverse events (“AEs”) related to the nervous system included dizziness, hypoaesthesia, paraesthesia, somnolence, headache and ataxia; and AEs related to general disorders and administration site conditions included injection site irritation, fatigue, injection site pain, and gait disturbance. These TEAEs have all been observed previously with Halneuron® and are described in the Investigator Brochure (and therefore are considered expected based on the known safety profile of Halneuron®). The majority of these most common TEAEs were shown to have a quick onset and a short duration and did not persist beyond the 4-day dosing interval.

Chemotherapy Induced Neuropathic Pain

CINP-201 was a randomized, double-blind, dose-finding, placebo-controlled, multicenter study of the potential efficacy and safety of Halneuron® in patients with CINP. One hundred and twenty-five patients were randomly assigned to 1 of 5 dosing cohorts: placebo BID, HAL 7.5 μg BID, HAL 15 μg BID, HAL 30 μg QD, or HAL 30 μg BID. Patients received Halneuron® or placebo by subcutaneous (“SC”) injection in the thigh and/or abdomen for 4 consecutive days. All patients received BID injections, regardless of their dosing cohort; and those patients assigned to once-daily Halneuron® received active drug for the first injection and placebo for the second injection each day.

The key results from this study were that:

The safety results showed that in the overall population, 105 of 125 patients (84.0%) experienced at least 1 TEAE. Most TEAEs reported were mild or moderate and were considered possibly related or related to the study drug. Oral paraesthesia was the most frequently reported TEAE for the overall population, followed by oral hypoaesthesia.

Four serious adverse events (“SAEs”) were reported in three patients, but these events did not result in any patient withdrawals and none of the SAEs were considered related or possibly related to the study drug. One death was reported during the study resulting from progression of the patient’s underlying metastatic disease that was not related to the study drug. In addition, two patients withdrew from the study because of an AE or vertigo, and one of the discontinuing patients also experienced a second AE of influenza-like illness.

No trends or clinically significant abnormal values were noted for safety laboratory assessments, vital signs, or electrocardiogram data.

In the first quarter of 2025, we commenced the HAL-CINP-203 Phase 2b clinical trial in the United States. HAL-CINP-203 is a double-blind, placebo controlled clinical trial to access the efficacy and safety of eight 30 μg Halneuron® SC injections given once a day over a 2-week period versus a placebo in approximately 240 patients (on a 1:1 ratio of Halneuron® to placebo) with moderate to severe neuropathic pain caused by previous platinum and/or taxane chemotherapy. The HAL-CINP-203 Phase 2b primary efficacy endpoint is pain improvement over 4 weeks in the weekly average of daily 24-hour recall pain intensity scores, comparing Halneuron® to the placebo. The secondary endpoints are patient global impression of change (“PGIC”), PROMIS regarding fatigue, PROMIS related to sleep, PROMIS-29, pain interference, hospital anxiety and depression scale (“HADS”) and neuropathic pain symptom inventory. An interim analysis conducted in December 2025 confirmed that Halneuron was separating from placebo in the 97 patient subset included in the analysis, and that a sample size of 210-240 was expected to provide 80+% power to see a statistically significant result. This preliminary evidence of a Halneuron® treatment effect is noteworthy as patients in the interim analysis population present an average duration of CINP of 5 years and 67% of patients that met entry criteria were also being treated with stable doses of other chronic pain medicines, including pregabalin, gabapentin, duloxetine, and opioids. In addition, the overall study dropout rate of approximately 4.4% is far below rates typically observed with other FDA approved chronic pain medicines. While still blinded, we believe these findings reaffirm the encouraging safety and tolerability profile of Halneuron® observed in previous clinical trials.

Other Select Clinical Experience

There has been extensive prior clinical experience with Halneuron®, and the safety profile is well understood. The most commonly reported AEs in clinical trials have been numbness and tingling at peripheral sites (e.g., fingers, toes and lips), which is related to sodium channel inhibition.

The first study, WEX-001, “A Sequential Design, Randomized, Double-Blind, Acute Single Ascending Dose Trial of the Tolerance of Intramuscular Halneuron® in Healthy Volunteers,” tested single doses of Halneuron® from 2.5 μg up to 45 μg, with each dose tested in a separate group of 8 patients (with 6 receiving the active drug and 2 receiving the placebo). All doses, including the highest dose of 45 μg, were well tolerated. The most commonly reported AEs were numbness and tingling at peripheral sites, such as the fingers, toes, and lips.

The second study, WEX-002, “A Randomized, Double-Blind, Placebo-Controlled Trial of Multiple-Dose Tolerance of Intramuscular Halneuron® in Healthy Volunteers,” tested Halneuron® intramuscularly in doses of 12 μg to 48 μg 4 times per day for 4 days. Each dose was tested in a separate group of 8 subjects (6 receiving the active drug and 2 receiving the placebo). This study indicated that 4 daily doses of up to 36 μg for 4 days were well tolerated, however, dose-related AEs of mild nausea and numbness and tingling at peripheral sites such as the lips, fingers, and toes were observed. No evidence of cumulative toxicity was observed over time. According to this study, the maximum tolerated multiple doses of Halneuron® in healthy normal volunteers was determined to be 36 μg given 4 times a day (every 4 hours) for 4 days.

HAL-TQT-101 was a phase 1 healthy adult study to determine if a single SC administration of Halneuron® at 15 μg, 30 μg and 45 μg dose levels has any effect on the QT/QTcF intervals when assessing concentration QT (C-QT) relationship (i.e., QT/QTc intervals prolongating in relation to plasma levels of Halneuron®). The finding of the study demonstrated that positive QTcF prolongations were not observed in patients administered 15, 30, or 45 μg Halneuron® and that the single SC administration of 15, 30, and 45 μg Halneuron® is generally safe and well tolerated in healthy adult patients. This is an important differentiating feature of Halneuron® given off target cardiovascular effects have been observed with other non-Nav 1.7 specific development candidates.

Antiviral Programs

While our primary focus is on advancing development of Halneuron® and SP16, we continue to explore partnership opportunities to advance our novel antiviral therapies to treat diseases associated with a viral triggered abnormal immune response such as fibromyalgia (“FM”) and Long-COVID (“LC”). Overactive immune response related to activation of tissue resident herpesvirus has been postulated to be a potential root cause of chronic illnesses such as FM, irritable bowel disease (“IBS”), LC, chronic fatigue syndrome and other functional somatic syndromes, all of which are characterized by a waxing and waning manifestation of the disease, often triggered by events which compromise the immune system.

IMC-1

IMC-1 is a combination of famciclovir and celecoxib that is intended to synergistically suppress herpesvirus activation and replication. Based on the analysis of the IMC-1 FORTRESS data, we believe focusing the forward development of IMC-1 on new FM patients represents a viable and manageable path forward. The Company met with the FDA in March 2023 to discuss the most appropriate next steps in advancing IMC-1 development as a treatment for FM. The Phase 3 program agreed with FDA includes two qualifying pivotal trials demonstrating the safety and efficacy of IMC-1 treating patients with FM. One of the Phase 3 studies will be a four-arm, multifactorial design to demonstrate the relative safety and efficacy of IMC-1 as compared to celecoxib alone, famciclovir alone and placebo. The other Phase 3 study is planned as a two-arm study comparing IMC-1 to placebo. All patients from the two pivotal Phase 3 studies will be offered the opportunity to enroll into an open label safety extension study in which all patients will be treated with IMC-1. Long-term safety data is required for chronic therapy approval. We are currently seeking external opportunities to continue the advancement of IMC-1.

IMC-2

IMC-2 is a combination of valacyclovir and celecoxib that, like IMC-1, is intended to synergistically suppress herpesvirus activation and replication with a more specific activity against the Epstein-Barr virus (herpesvirus HHV-4). In September 2023, we requested a Pre-Investigational New Drug Application (“PIND”) for IMC-2 for the treatment of LC with the FDA. In October, we submitted a full briefing package and by the end of December

2023, we received written communication from the Antivirals Group, Division of Infectious Diseases, on the development requirements and key endpoints associated with advancing IMC-2 into Phase 2 for treatment of LC symptoms. The FDA agreed that we could use improvement in fatigue as a primary endpoint in a Phase 2 study and agreed with our overall study design. The Phase 2 study will compare IMC-2 versus placebo in a randomized, double-blind study of LC patients for 12 weeks. We are currently seeking external opportunities to continue the advancement of IMC-2.

Serpin Peptide 16 (SP16)

Chemotherapy induced peripheral neuropathy (“CIPN”) is a prevalent and debilitating complication of cancer treatment, affecting an estimated 68% of patients within the first month after therapy and persisting in approximately 30% of survivors beyond six months. Taxanes and platinum agents are among the most neurotoxic chemotherapeutics, frequently resulting in dose‑limiting neuropathy that compromises treatment efficacy and long‑term survivorship. Despite its clinical significance, no FDA‑approved therapies exist to prevent or treat CIPN, and current off‑label interventions such as duloxetine provide only marginal benefit with notable side effects.

SP16 is a synthetic anti-inflammatory peptide developed to replicate the cytoprotective and anti-inflammatory signaling properties of Serine Protease Inhibitors (SERPINs), such as α1-Antitrypsin (AAT), without exerting protease inhibitory activity. Upon protease binding and enzymatic inactivation, SERPINs undergo a conformational change that exposes a conserved peptide motif (typically 5–11 amino acids), which engages the low-density lipoprotein receptor-related protein 1 (“LRP1”). LRP1 mediates clearance of plasma proteins and initiates downstream anti-inflammatory and cytoprotective signaling. SP16 retains this LRP1‑binding motif while eliminating protease inhibition, resulting in a 17‑amino acid peptide with enhanced plasma stability and potency. In vitro binding studies confirm selective engagement of LRP1 without meaningful affinity for other receptor classes.

Through LRP1 activation, SP16 mitigates damaging inflammation, rebalances immune signaling, and promotes neuronal survival and regeneration. Preclinical studies demonstrate that SP16 alleviates paclitaxel‑induced cold and mechanical allodynia, reduces neuroinflammatory cytokine expression, and promotes neuronal repair via p‑AKT signaling. Importantly, SP16 does not interfere with the anticancer activity of taxanes or other chemotherapeutic classes, a critical safeguard for its use in combination with chemotherapy.

The SP16 program is in early Phase 1 development with a National Cancer Institute funded grant and is expected to start in mid-2026. The first in-human studies are anticipated to involve administration of SP16 to breast cancer patients to investigate the potential for SP16 to reduce neuropathy secondary to treatment with chemotherapeutic agents that are also neurotoxic.

Our Product Development Pipeline

We currently have a pipeline of candidates with significant potential for value creation.

Intellectual Property

We strive to protect and enhance the proprietary technologies, inventions and improvements that we believe are important to our business, including seeking, maintaining and defending patent rights, whether developed internally or licensed from third parties. Our policy is to seek to protect our proprietary position by, among other methods, pursuing and obtaining patent protection in the United States and in jurisdictions outside of the United States related to our proprietary technology, inventions, improvements, platforms and our product candidates that are important to the development and implementation of our business.

As of December 31, 2025, our portfolio of owned Halneuron®-related patents totaled 7 issued families of patents in the United States and abroad. As TTX is a natural molecule, we do not hold Composition of Matter patents. However, we do hold patents related to the manufacturing, formulation, and use of Halneuron®. Exclusivity of our issued patents expires over the period of 2027 to 2030. Once pending patents are issued, exclusivity extends to 2042 and 2045.

Issued Family of Patents

Pending Patent Families

As of December 31, 2025, our licensed SP16 portfolio includes two patent families which include one issued U.S. patent and eight foreign patents. The licensed patent families also include patent applications pending in the U.S. and abroad. The licensed families cover methods of using SP16. Issued patent and patents issuing from the pending applications of the two licensed families are expected to expire in 2036 and 2042.

Issued SP16 Family 1 Patents

Pending SP16 Family 1 Patent Applications

Pending SP16 Family 2 Patent Applications

As of December 31, 2025, our antiviral portfolio of owned patents totaled 14 issued patents in the United States and abroad. This includes three Composition of Matter patents, including a Synergistic Patent, and two Method of Use patents in the United States, all of which relate to IMC-1. Exclusivity with all patents extends to 2033.

Issued US IMC-1 Patents

Issued Foreign IMC-1 Patents

U.S. Patents Covering Other Anti-Viral Combinations

U.S. Pending Applications

Individual patents extend for varying periods depending on the date of filing of the patent application or the date of patent issuance and the legal term of patents in the countries in which they are obtained. Generally, patents issued for regularly filed applications in the United States are granted a term of 20 years from the earliest effective non-provisional filing date. In addition, in certain instances, a patent term can be extended to recapture a portion of the U.S. Patent and Trademark Office (“USPTO”) delay in issuing the patent as well as a portion of the term effectively lost as a result of the FDA regulatory review period. However, as to the FDA component, the restoration period cannot be longer than five years and the total patent term including the restoration period must not exceed 14 years following FDA approval. The duration of foreign patents varies in accordance with provisions of applicable local law, but typically is also 20 years from the earliest effective filing date. However, the actual protection afforded by a patent varies on a product-by-product basis, from country to country and depends upon many factors, including the type of patent, the scope of its coverage, the availability of regulatory-related extensions, the availability of legal remedies in a particular country and the validity and enforceability of the patent.

Furthermore, we rely upon trade secrets and know-how and continuing technological innovation to develop and maintain our competitive position. We seek to protect our proprietary information, in part, using confidentiality agreements with our collaborators, employees and consultants and invention assignment agreements with our employees. We also have confidentiality agreements or invention assignment agreements with our collaborators and selected consultants. These agreements are designed to protect our proprietary information and, in the case of the invention assignment agreements, to grant us ownership of technologies that are developed through a relationship with a third party. These agreements may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our collaborators, employees and consultants use intellectual property owned by others in their work for us, disputes may arise as to the rights in related or resulting know-how and inventions.

Our commercial success will also depend in part on not infringing upon the proprietary rights of third parties. It is uncertain whether the issuance of any third-party patent would require us to alter our development or commercial strategies, or our drugs or processes, obtain licenses or cease certain activities. Our breach of any license agreements or failure to obtain a license to proprietary rights that we may require to develop or commercialize our future drugs may have an adverse impact on us. If third parties have prepared and filed patent applications prior to March 16, 2013 in the United States that also claim technology to which we have rights, we may have to participate in interference proceedings in the USPTO, to determine priority of invention. For more information, please see “Risk Factors––Risks Related to Our Intellectual Property.”

Material Agreements

In 2012, we entered into a Know-How License Agreement (the “License Agreement”) with the University of Alabama. In consideration for the License Agreement, the University of Alabama received membership interests in the Company representing 10% of the issued membership interests at that time. The License Agreement is in effect for 25 years and will terminate on June 1, 2037. Under the License Agreement, we were granted a non-exclusive, worldwide, royalty-free license to utilize, including the right to sublicense and sell products incorporating, the know-how, technical information, and data related and pertaining to the herpesvirus biology, including herpesvirus replication mechanisms, modes of action of anti-herpesvirus medications, and sensitivity and accuracy of herpesvirus diagnostic tests, any of which were developed by the University of Alabama under the direction of Dr. Carol Duffy before the effective date of the License Agreement, all of which is defined as the Technical Information. The University of Alabama reserved the right to use the Technical Information for educational, research, clinical, and other non-commercial purposes. We may assign the license to any purchaser or transferee of substantially all of our assets.

On September 29, 2025, we entered into an Exclusive Licensing Agreement (the “Licensing Agreement”) with Serpin Pharma Inc. (“Serpin Pharma”) and Rejuvenation Labs, Inc. (“Rejuvenation” and, together with Serpin Pharma, “Serpin”), pursuant to which Serpin Pharma granted the Company a royalty-free, sublicensable global license to develop Serpin Pharma’s intravenous formulation of SP16.

Sales and Marketing

If Halneuron®, SP16, IMC-1 or IMC-2 receives regulatory approval, we plan to enter into sales and marketing agreements with one or several pharmaceutical companies to sell to anesthesiologists, oncologists, and to primary care physicians.

Manufacturing

We rely on third-party contractors for manufacturing clinical supplies and plan to do so for commercial supply as well. For Halneuron®, we are currently working with an overseas supplier for the synthetic development of the active pharmaceutical ingredient (“API”). We are also working with a Canadian manufacturer for lyophilization and manufacturing of Halneuron®’s lyophilized fill and finish product which will be distributed to the clinical sites for reconstitution and use in clinical trials.

We are presently developing a synthetically formulated version of Halneuron® to be used for both Phase 3 development as well as for commercialization, presuming success in future development and approval by the FDA. This new process is nearing completion, as evidenced by the establishment of chemical equivalence between naturally harvested tetrodotoxin and the new synthetic formulation. We plan to engage with the FDA in the second half of 2026 to discuss their regulatory feedback regarding advancing the synthetic formulation for Phase 3 in 2027. There are several benefits to advancing a synthetically manufactured Halneuron® product, including establishment of a highly repeatable and more cost-effective manufacturing process and to garner significantly longer intellectual property protection, the latter of which we plan to file later this year.

We are working with Serpin Pharma and their contract manufacturer to supply SP16 for development research and may do so for commercialization, presuming continued successful clinical development.

Government Regulation

The FDA and comparable regulatory authorities in state and local jurisdictions and in other countries impose substantial and burdensome requirements upon companies involved in the clinical development, manufacture, marketing and distribution of drugs, such as those we are developing. These agencies and other federal, state and local entities regulate, among other things, the research and development, testing, manufacture, quality control, safety, effectiveness, labeling, storage, record keeping, approval, advertising and promotion, distribution, post-approval monitoring and reporting, sampling and export and import of our product candidates.

U.S. Government Regulation of Drug Products

In the United States, the FDA regulates drugs under the FDCA and its implementing regulations. The process of obtaining regulatory approvals and the subsequent compliance with applicable federal, state, local and foreign statutes and regulations requires the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval, may subject an applicant to a variety of administrative or judicial sanctions, such as the FDA’s refusal to approve pending NDAs, withdrawal of an approval, imposition of a clinical hold, issuance of warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties.

The process required by the FDA before a drug may be marketed in the United States generally involves the following:

Preclinical Studies

Preclinical studies include laboratory evaluation of product chemistry, toxicity and formulation, as well as animal studies to assess potential safety and efficacy. An IND sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data and any available clinical data or literature, among other things, to the FDA as part of an IND. Some preclinical testing may continue even after the IND is submitted. An IND automatically becomes effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or questions related to one or more proposed clinical trials and places the clinical trial on a clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. As a result, submission of an IND may not result in the FDA allowing clinical trials to initiate.

Clinical Trials

Clinical trials involve the administration of the investigational new drug to human subjects under the supervision of qualified investigators in accordance with GCP requirements, which include the requirement that all research subjects provide their informed consent in writing for their participation in any clinical trial. Clinical trials are conducted under protocols detailing, among other things, the objectives of the trial, the parameters to be used in monitoring safety, and the effectiveness criteria to be evaluated. A protocol for each clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. In addition, an IRB at

each institution participating in the clinical trial must review and approve the plan for any clinical trial before it initiates at that institution. Information about certain clinical trials must be submitted within specific timeframes to the NIH for public dissemination on their www.clinicaltrials.gov website.

Human clinical trials are typically conducted in three sequential phases, which may overlap or be combined:

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and more frequently if serious adverse events occur. Phase 1, Phase 2 and Phase 3 studies or trials may not be completed successfully within any specified period, or at all. Furthermore, the FDA or the sponsor may suspend or terminate a clinical trial at any time on various grounds, including a finding that the research subjects are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the drug has been associated with unexpected serious harm to patients.

Marketing Approval

Assuming successful completion of the required clinical testing, the results of the preclinical and clinical studies, together with detailed information relating to the product’s chemistry, manufacture, controls and proposed labeling, among other things, are submitted to the FDA as part of an NDA requesting approval to market the product for one or more indications. In most cases, the submission of an NDA is subject to a substantial application user fee. Under the Prescription Drug User Fee Act (“PDUFA”), guidelines that are currently in effect, the FDA has a goal of ten months from the date of “filing” of a standard NDA, for a new molecular entity to review and act on the submission. This review typically takes twelve months from the date the NDA is submitted to the FDA because the FDA has approximately two months to make a “filing” decision.

In addition, under the Pediatric Research Equity Act of 2003, as amended and reauthorized, certain NDAs or supplements to an NDA must contain data that are adequate to assess the safety and effectiveness of the drug for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective.

The FDA also may require submission of a REMS plan to ensure that the benefits of the drug outweigh its risks. The REMS plan could include medication guides, physician communication plans, assessment plans, and/or elements to assure safe use, such as restricted distribution methods, patient registries, or other risk minimization tools.

The FDA conducts a preliminary review of all NDAs within the first 60 days after submission, before accepting them for filing, to determine whether they are sufficiently complete to permit substantive review. The FDA may request additional information rather than accept an NDA for filing. In this event, the application must be resubmitted with the additional information. The resubmitted application is also subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review. The FDA reviews an NDA to determine, among other things, whether the drug is safe and effective and

whether the facility in which it is manufactured, processed, packaged or held meets standards designed to assure the product’s continued safety, quality and purity.

The FDA may refer an application for a novel drug to an advisory committee. An advisory committee is a panel of independent experts, including clinicians and other scientific experts, which reviews, evaluates and provides a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions.

Before approving an NDA, the FDA typically will inspect the facility or facilities where the product is manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities comply with cGMP requirements and are adequate to assure consistent production of the product within required specifications. Additionally, before approving an NDA, the FDA may inspect one or more clinical trial sites to assure compliance with GCP requirements.

After evaluating the NDA and all related information, including the advisory committee recommendation, if any, and inspection reports regarding the manufacturing facilities and clinical trial sites, the FDA may issue an approval letter, or, in some cases, a complete response letter. A complete response letter generally contains a statement of specific conditions that must be met in order to secure final approval of the NDA and may require additional clinical or preclinical testing for the FDA to reconsider the application. Even with submission of this additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval. If and when those conditions have been met to the FDA’s satisfaction, the FDA will typically issue an approval letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications.

Even if the FDA approves a product, it may limit the approved indications for use of the product, require that contraindications, warnings or precautions be included in the product labeling, require that post-approval studies, including Phase 4 clinical trials, be conducted to further assess a drug’s safety after approval, require testing and surveillance programs to monitor the product after commercialization, or impose other conditions, including distribution and use restrictions or other risk management mechanisms under a REMS, which can materially affect the potential market and profitability of the product. The FDA may prevent or limit further marketing of a product based on the results of post-marketing studies or surveillance programs. After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes, and additional labeling claims, are subject to further testing requirements and FDA review and approval.

Special FDA Expedited Review and Approval Programs

The FDA has various programs, including fast track designation, accelerated approval, priority review, and breakthrough therapy designation, which are intended to expedite or simplify the process for the development and FDA review of drugs that are intended for the treatment of serious or life-threatening diseases or conditions and demonstrate the potential to address unmet medical needs. The purpose of these programs is to provide important new drugs to patients earlier than under standard FDA review procedures.

To be eligible for a fast track designation, the FDA must determine, based on the request of a sponsor, that a product is intended to treat a serious or life-threatening disease or condition and demonstrates the potential to address an unmet medical need. The FDA will determine that a product will fill an unmet medical need if it will provide a therapy where none exists or provide a therapy that may be potentially superior to existing therapy based on efficacy or safety factors. The FDA may review sections of the NDA for a fast track product on a rolling basis before the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the NDA, the FDA agrees to accept sections of the NDA and determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission of the first section of the NDA.

The FDA may give a priority review designation to drugs that offer major advances in treatment or provide a treatment where no adequate therapy exists. A priority review means that the goal for the FDA to review an

application is six months, rather than the standard review of ten months under current PDUFA guidelines. Under the current PDUFA agreement, these six- and ten-month review periods are measured from the “filing” date rather than the receipt date for NDAs for new molecular entities, which typically adds approximately two months to the timeline for review and decision from the date of submission. Most products that are eligible for fast track designation are also likely to be considered appropriate to receive a priority review.

In addition, products tested for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful therapeutic benefit over existing treatments may be eligible for accelerated approval and may be approved on the basis of adequate and well-controlled clinical trials establishing that the drug product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality (IMM) that is reasonably likely to predict an effect on IMM or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. As a condition of approval, the FDA may require a sponsor of a drug receiving accelerated approval to perform post-marketing studies to verify and describe the predicted effect on IMM or other clinical endpoint, and the drug may be subject to accelerated withdrawal procedures.

Moreover, under the provisions of the Food and Drug Administration Safety and Innovation Act, a sponsor can request designation of a product candidate as a “breakthrough therapy.” A breakthrough therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. Drugs designated as breakthrough therapies are also eligible for accelerated approval. The FDA must take certain actions, such as holding timely meetings and providing advice, intended to expedite the development and review of an application for approval of a breakthrough therapy.

Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened. We may explore some of these opportunities for our product candidates as appropriate.

Accelerated Approval Pathway

The FDA may grant accelerated approval to a drug for a serious or life-threatening condition that provides meaningful therapeutic advantage to patients over existing treatments based upon a determination that the drug influences a surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA may also grant accelerated approval for such a condition when the product has an effect on an intermediate clinical endpoint that can be measured earlier than an effect on IMM, and that is reasonably likely to predict an effect on IMM or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. Drugs granted accelerated approval must meet the same statutory standards for safety and effectiveness as those granted traditional approval.

For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, physical sign or other measure that is thought to predict clinical benefit but is not itself a measure of clinical benefit. Surrogate endpoints can often be measured more easily or more rapidly than clinical endpoints. An intermediate clinical endpoint is a measurement of a therapeutic effect that is considered reasonably likely to predict the clinical benefit of a drug, such as an effect on IMM. The FDA has limited experience with accelerated approvals based on intermediate clinical endpoints, but has indicated that such endpoints generally may support accelerated approval where the therapeutic effect measured by the endpoint is not itself a clinical benefit and basis for traditional approval, if there is a basis for concluding that the therapeutic effect is reasonably likely to predict the ultimate clinical benefit of a drug.

The accelerated approval pathway is most often used in settings in which the course of a disease is long, and an extended period is required to measure the intended clinical benefit of a drug, even if the effect on the

surrogate or intermediate clinical endpoint occurs rapidly. Thus, accelerated approval has been used extensively in the development and approval of drugs for treatment of a variety of cancers in which the goal of therapy is generally to improve survival or decrease morbidity and the duration of the typical disease course requires lengthy and sometimes large trials to demonstrate a clinical or survival benefit.

The accelerated approval pathway is usually contingent on a sponsor’s agreement to conduct, in a diligent manner, additional post-approval confirmatory studies to verify and describe the drug’s clinical benefit. As a result, a drug candidate approved on this basis is subject to rigorous post-marketing compliance requirements, including the completion of Phase 4 or post-approval clinical trials to confirm the effect on the clinical endpoint. Failure to conduct required post-approval studies or confirm a clinical benefit during post-marketing studies, would allow the FDA to withdraw the drug from the market on an expedited basis. All promotional materials for drug candidates approved under accelerated regulations are subject to prior review by the FDA.

Orphan Drug Designation and Exclusivity

Under the Orphan Drug Act, the FDA may designate a drug product as an “orphan drug” if it is intended to treat a rare disease or condition (generally meaning that it affects fewer than 200,000 individuals in the United States, or more in cases in which there is no reasonable expectation that the cost of developing and making a drug product available in the United States for treatment of the disease or condition will be recovered from sales of the product). A company must request orphan product designation before submitting an NDA. If the request is granted, the FDA will disclose the identity of the therapeutic agent and its potential use. Orphan product designation does not convey any advantage in or shorten the duration of the regulatory review and approval process.

If a product with orphan status receives the first FDA approval for the disease or condition for which it has such designation or for a select indication or use within the rare disease or condition for which it was designated, the product generally will be receiving orphan product exclusivity. Orphan product exclusivity means that the FDA may not approve any other applications for the same product for the same indication for seven years, except in certain limited circumstances. If a drug or drug product designated as an orphan product ultimately receives marketing approval for an indication broader than what was designated in its orphan product application, it may not be entitled to exclusivity. Orphan exclusivity will not bar approval of another product under certain circumstances, including if a subsequent product with the same active ingredient for the same indication is shown to be clinically superior to the approved product on the basis of greater efficacy or safety, or providing a major contribution to patient care, or if the company with orphan drug exclusivity is not able to meet market demand. Further, the FDA may approve more than one product for the same orphan indication or disease if the products contain different active ingredients. Moreover, competitors may receive approval of different products for the indication for which the orphan product has exclusivity or obtain approval for the same product but for a different indication for which the orphan product has exclusivity.

Post-Approval Requirements

Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA, including, among other things, requirements relating to recordkeeping, periodic reporting, product sampling and distribution, advertising and promotion and reporting of adverse experiences with the product. After approval, most changes to the approved product, such as adding new indications or other labeling claims are subject to prior FDA review and approval. There are continuing, annual program user fee requirements for any marketed products.

The FDA may impose a number of post-approval requirements as a condition of approval of an NDA. For example, the FDA may require post-marketing testing, including Phase 4 clinical trials, and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization.

In addition, drug manufacturers and other entities involved in the manufacture and distribution of approved drugs are required to register their establishments and list their marketed drug products with the FDA and state

agencies and are subject to periodic unannounced inspections by the FDA and these state agencies for compliance with cGMP requirements. Changes to the manufacturing process are strictly regulated and often require prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP requirements and impose reporting and documentation requirements upon the sponsor and any third-party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance.

Once an approval of a drug is granted, the FDA may withdraw the approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing processes, or failure to comply with regulatory requirements, may result in mandatory revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical trials to assess new safety risks; or imposition of distribution or other restrictions under a REMS program. Other potential consequences include, among other things:

The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Drugs or devices may be promoted only for the approved indications and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant liability.

U.S. Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of our product candidates for which we may seek regulatory approval. Sales in the U.S. will depend in part on the availability of adequate financial coverage and reimbursement from third-party payors, which include government health programs such as Medicare, Medicaid, TRICARE and the Veterans Administration, as well as managed care organizations and private health insurers. Prices at which we or our customers seek reimbursement for our product candidates can be subject to challenge, reduction or denial by payors.

The process for determining whether a payor will provide coverage for a product is typically separate from the process for setting the reimbursement rate that the payor will pay for the product. Third-party payors may limit coverage to specific products on an approved list or formulary, which might not include all the FDA-approved products for a particular indication. Also, third-party payors may refuse to include a branded drug on their formularies or otherwise restrict patient access to a branded drug when a less costly generic equivalent or another alternative is available. However, a payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be available. Private payors often rely on the lead of the governmental payors in rendering coverage and reimbursement determinations. Sales of any approved products will therefore depend substantially on the extent to which the costs of our products will be paid by third-party payors. Achieving favorable coverage and reimbursement from the Centers for Medicare and Medicaid Services

(“CMS”) and/or the Medicare Administrative Contractors is typically a significant gating issue for successful introduction of a new product.

Third-party payors are increasingly challenging the price and examining the medical necessity and cost-effectiveness of medical products and services, in addition to their safety and efficacy. In order to obtain coverage and reimbursement for any product that might be approved for marketing, we may need to conduct studies in order to demonstrate the medical necessity and cost-effectiveness of any products, which would be in addition to the costs expended to obtain regulatory approvals. Third-party payors may not consider our product candidates to be medically necessary or cost-effective compared to other available therapies, or the rebate percentages required to secure favorable coverage may not yield an adequate margin over cost or may not enable us to maintain price levels sufficient to realize an appropriate return on our investment in drug development.

U.S. Healthcare Fraud and Abuse Laws and Compliance Requirements

We are subject to various federal and state laws targeting fraud and abuse in the healthcare industry. These laws may impact, among other things, our proposed sales and marketing programs. In addition, we may be subject to patient privacy regulation by both the federal government and the states in which we conduct our business. The laws that may affect our operations include:

The Hatch-Waxman Amendments and Generic Competition

Section 505(b)(2) NDAs

As an alternative path to FDA approval for modifications to formulations or uses of products previously approved by the FDA, an applicant may submit an NDA under Section 505(b)(2) of the FDCA.

Section 505(b)(2) was enacted as part of the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as “the Hatch-Waxman Amendments” to the FDCA and enables the applicant to rely, in part,

on the FDA’s previous approval of a similar product, or published literature, in support of its application. Section 505(b)(2) permits the filing of an NDA where at least some of the information required for approval comes from studies not conducted by, or for, the applicant and for which the applicant has not obtained a right of reference. If the Section 505(b)(2) applicant can establish that reliance on FDA’s previous findings of safety and effectiveness is scientifically appropriate, it may eliminate the need to conduct certain preclinical studies or clinical trials of the new product. The FDA may also require companies to perform additional studies or measurements, including clinical trials, to support the change from the approved reference drug. The FDA may then approve the new product candidate for all, or some, of the label indications for which the reference drug has been approved or for any new indication sought by the Section 505(b)(2) applicant.

ANDA Approval Process

The Hatch-Waxman Amendments also established an abbreviated FDA approval process for drugs that are shown to be bioequivalent to drugs previously approved by the FDA through the NDA process. Approval to market and distribute these drugs is obtained by filing an abbreviated new drug application (“ANDA”) with the FDA. An ANDA provides for marketing of a drug product that has the same active ingredients in the same strengths and dosage form as the listed drug and has been shown to be bioequivalent to the listed drug. An ANDA is a comprehensive submission that contains, among other things, data and information pertaining to the active pharmaceutical ingredient, drug product formulation, specifications and stability of the generic drug, as well as analytical methods, manufacturing process validation data and quality control procedures. ANDAs are termed abbreviated because they generally do not include preclinical and clinical data to demonstrate safety and effectiveness. Instead, a generic applicant must demonstrate that its product is bioequivalent to the innovator drug. Drugs approved in this way are commonly referred to as “generic equivalents” to the listed drug and can often be substituted by pharmacists under prescriptions written for the original listed drug.

Orange Book Listing

In seeking approval for a drug through an NDA, including a 505(b)(2) NDA, applicants are required to list with the FDA certain patents whose claims cover the applicant’s product. Upon approval, each of the patents listed in the application for the drug is then published in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations, commonly known as the Orange Book. Any applicant who files an ANDA seeking approval of a generic equivalent version of a drug listed in the Orange Book or a Section 505(b)(2) NDA referencing a drug listed in the Orange Book must certify to the FDA, as applicable, that (1) no patent information on the drug product that is the subject of the application has been submitted to the FDA; (2) such patent has expired; (3) the date on which such patent expires; or (4) such patent is invalid or will not be infringed upon by the manufacture, use or sale of the drug product for which the application is submitted. This last certification is known as a paragraph IV certification. A notice of the paragraph IV certification must be provided to each owner of the patent that is the subject of the certification and to the holder of the approved NDA to which the ANDA or Section 505(b)(2) application refers. The applicant may also elect to submit a “section viii” statement certifying that its proposed label does not contain (or carves out) any language regarding a patented method-of-use that is approved for the reference drug, rather than certify to a listed method-of-use patent.

If within 45 days of receipt of a Paragraph IV Notification the NDA holder for the reference drug and/or patent owners initiates a patent infringement lawsuit against the ANDA or 505(b)(2) applicant, the FDA is prohibited from approving the application until the earlier of 30 months from the receipt of the paragraph IV certification (the 30-Month Stay), expiration of the patent, settlement of the lawsuit with a finding of patent invalidity or non-infringement, or a decision in the infringement case that is favorable to the applicant.

The ANDA or Section 505(b)(2) application also will not be approved until any applicable non-patent exclusivity listed in the Orange Book for the reference drug has expired as described in further detail below.

Non-Patent Exclusivity

In addition to patent exclusivity, the holder of the NDA for the listed drug may be entitled to a period of non-patent exclusivity, during which the FDA cannot approve an ANDA or Section 505(b)(2) application that relies on the listed drug. For example, a pharmaceutical manufacturer may obtain five years of non-patent exclusivity upon NDA approval of a new chemical entity, or NCE, which is a drug that contains an active moiety that has not been approved by the FDA in any other NDA. A fixed combination drug product may receive NCE exclusivity if one of its active ingredients is an NCE, but not if all of its active ingredients have previously been approved. An “active moiety” is defined as the molecule or ion responsible for the drug substance’s physiological or pharmacologic action. During the five year exclusivity period, the FDA cannot accept for filing any ANDA seeking approval of a generic version of that drug or any Section 505(b)(2) NDA for the same active moiety and that relies on the FDA’s findings regarding that drug, except that the FDA may accept such an application for filing after four years if the application includes a paragraph IV certification to a listed patent. In the case of such applications accepted for filing between four and five years after approval of the reference drug, a 30-Month Stay of approval triggered by a timely patent infringement lawsuit is extended by the amount of time necessary to extend the stay until 7-1/2 years after the approval of the reference drug NDA.

A drug, including one approved under Section 505(b)(2), may obtain a three-year period of exclusivity for a particular condition of approval, or change to a marketed product, such as a new formulation for a previously approved product, if one or more new clinical trials (other than bioavailability studies) was essential to the approval of the application and was conducted/sponsored by the applicant. Should this occur, the FDA would be precluded from approving any ANDA or Section 505(b)(2) application for the protected modification until after that three-year exclusivity period has run. However, unlike NCE exclusivity, the FDA can accept an application and begin the review process during the exclusivity period.

Regulation Outside the United States

To the extent that any of our product candidates, once approved, are sold in a foreign country, we may be subject to similar foreign laws and regulations, which may include, for instance, applicable post-marketing requirements, including safety surveillance, anti-fraud and abuse laws and implementation of corporate compliance programs and reporting of payments or other transfers of value to healthcare professionals.

To market our future products in the EEA (which is comprised of the 27 Member States of the EU plus Norway, Iceland and Liechtenstein) and many other foreign jurisdictions, we must obtain separate regulatory approvals. More concretely, in the EEA, medicinal products can only be commercialized after obtaining a Marketing Authorization (“MA”). There are two types of marketing authorizations:

Under the above described procedures, before granting the MA, the EMA or the competent authorities of the member countries of the EEA assess the risk-benefit balance of the product based on scientific criteria concerning its quality, safety and efficacy.

Data and Marketing Exclusivity

In the EEA, new products authorized for marketing, or reference products, qualify for eight years of data exclusivity and an additional two years of market exclusivity upon marketing authorization. The data exclusivity period prevents generic or biosimilar applicants from relying on the pre-clinical and clinical trial data contained in the dossier of the reference product when applying for a generic or biosimilar marketing authorization in the EU during a period of eight years from the date on which the reference product was first authorized in the EU. The market exclusivity period prevents a successful generic or biosimilar applicant from commercializing its product in the EU until 10 years have elapsed from the initial authorization of the reference product in the EU. The 10-year market exclusivity period can be extended to a maximum of eleven years if, during the first eight years of those 10 years, the marketing authorization holder obtains an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to bring a significant clinical benefit in comparison with existing therapies.

Orphan Drug Designation

In the EEA, a medicinal product can be designated as an orphan drug if its sponsor can establish that the product is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition affecting not more than five in ten thousand persons in the EU when the application is made, or that the product is intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition in the EU and that without incentives it is unlikely that the marketing of the drug in the EU would generate sufficient return to justify the necessary investment in development. For either of these conditions, the applicant must demonstrate that there exists no satisfactory method of diagnosis, prevention or treatment of the condition in question that has been authorized in the EU or, if such method exists, the drug will be of significant benefit to those affected by that condition.

In the EEA, an application for designation as an orphan product can be made any time prior to the filing of an application for approval to market the product. Marketing authorization for an orphan drug leads to a ten-year period of market exclusivity. During this market exclusivity period, the EMA or the member state competent authorities, cannot accept another application for a marketing authorization, or grant a marketing authorization, for a similar medicinal product for the same indication. The period of market exclusivity is extended by two years for medicines that have also complied with an agreed pediatric investigation plan.

This period may, however, be reduced to six years if, at the end of the fifth year, it is established that the product no longer meets the criteria for orphan drug designation, for example because the product is sufficiently profitable not to justify market exclusivity. Market exclusivity can be revoked only in very selected cases, such as consent from the marketing authorization holder, inability to supply sufficient quantities of the product, demonstration of “clinical superiority” by a similar medicinal product, or, after a review by the Committee for Orphan Medicinal Products, requested by a member state in the fifth year of the marketing exclusivity period (if the designation criteria are believed to no longer apply). Medicinal products designated as orphan drugs are eligible for incentives made available by the EU and its Member States to support research into, and the development and availability of, orphan drugs.

Human Capital Resources

As of December 31, 2025, we had eight full-time employees and no part-time employees with five employees working in the U.S. and three employees working in Canada. Accordingly, a high percentage of our work performed for our development projects is outsourced to qualified independent contractors. All employees and contractors are subject to contractual agreements that specify requirements for confidentiality, ownership of newly developed intellectual property and restrictions on working for competitors as well as other matters.

Facilities

Dogwood leases offices for its Canadian employees at the address 1150-1100 Melville St, Vancouver, B.C., Canada. At this time, the Company does not own or lease any location in the United States other than a “virtual office” at the address set forth on the cover page of this Annual Report.

Share Exchange Agreement and Combination

On October 7, 2024, the Company, entered into a Share Exchange Agreement (the “Exchange Agreement”) with Sealbond Limited (“Sealbond”) pursuant to which the Company acquired 100% of the issued and outstanding common shares of Pharmagesic (Holdings) Inc. (“Pharmagesic”, and such transaction, the “Combination”). Prior to the Combination, Pharmagesic was a wholly-owned subsidiary of Sealbond and an indirect wholly-owned subsidiary of CK Life Sciences Int’l., (Holdings) Inc. (“CKLS”), a listed entity on the Main Board of the Hong Kong Stock Exchange.

Under the terms of the Exchange Agreement, upon the consummation of the Combination, in exchange for all of the outstanding common shares of Pharmagesic, the Company issued to Sealbond an aggregate of (A) 211,383 shares of the Company’s common stock, par value $0.0001 per share (“Common Stock”) and (B) 2,108.3854 shares of the Company’s Series A Non-Voting Convertible Preferred Stock, par value $0.0001 per share (“Series A Preferred Stock”). Each share of Series A Preferred Stock was convertible into 10,000 shares of Common Stock, subject to certain conditions.

Loan Agreement

On October 7, 2024, in connection with the Exchange Agreement, the Company entered into a Loan Agreement (the “Loan Agreement”) with Conjoint Inc., a Delaware corporation (“Lender”). Pursuant to the Loan Agreement, Lender agreed to make a loan to the Company in the aggregate principal amount of $19,500,000, of which (i) $16,500,000 was disbursed on October 7, 2024 and (ii) $3,000,000 was disbursed on February 18, 2025. Prior to the Debt Exchange and Cancellation Transaction described below, the Loan Agreement bore interest at the Secured Overnight Financing Rate (“SOFR”). The Loan Agreement was payable in full with principal and accrued interest on October 7, 2027.

On March 12, 2025, we entered into a Debt Exchange and Cancellation Agreement (the “Exchange and Cancellation Agreement”) with the Lender. Pursuant to the Exchange and Cancellation Agreement, the principal amount of all loans made to the Company under the Loan Agreement, along with accrued interest through March 12, 2025, was deemed repaid and all of the Company’s obligations satisfied in full and cancelled in exchange for 284.2638 shares of the Company’s Series A-1 Non-Voting Convertible Preferred Stock, par value $0.0001 per share (“Series A-1 Preferred Stock”) (the “Debt Exchange and Cancellation Transaction”).

Reverse Stock Split

On October 7, 2024, the Company effected a reverse stock split (the “Reverse Stock Split”), pursuant to which every 25 shares of the Company’s issued and outstanding Common Stock was converted automatically into one issued and outstanding share of Common Stock. The Reverse Stock Split affected all stockholders uniformly and did not by itself alter any stockholder’s percentage interest in the Company’s equity, except to the extent that the Reverse Stock Split would result in a stockholder owning a fractional share. No fractional shares were issued in connection with the Reverse Stock Split and any stockholder who would have received any fractional shares instead received a cash payment equal to the fair market value of such fractional share.

March 2025 Offering

On March 12, 2025, we entered into an agreement with Maxim Group LLC as placement agent in connection with the issuance and sale by the Company in a registered direct offering of 578,950 shares of our Common Stock at a price of $8.26 per share (the “March 2025 Offering”), pursuant to an effective shelf

registration statement on Form S-3 (File No. 333-263700). The March 2025 Offering closed on March 14, 2025, and the gross proceeds from the March 2025 Offering were approximately $4.78 million. The net proceeds of the March 2025 Offering were approximately $4.25 million after deducting placement agent fees and offering expenses payable by the Company.

Serpin Licensing Agreement

On September 29, 2025, we entered into the Licensing Agreement with Serpin, pursuant to which Serpin granted the Company a royalty-free, sublicensable global license to develop Serpin Pharma’s intravenous formulation of SP16. SP16 is a first-in-class low density LRP1 agonist which has demonstrated both anti-inflammatory, immunomodulatory and neural repair activity that has the potential to treat chemotherapy-induced peripheral neuropathy. In consideration of the Licensing Agreement, we issued 191,017 shares of Common Stock and 89.5939 shares of Series A-2 Non-Voting Convertible Preferred Stock, par value $0.0001 per share (“Series A-2 Preferred Stock”) to Serpin Pharma and (ii) 191,017 shares of Common Stock and 89.5939 shares of Series A-2 Preferred Stock to Rejuvenation, as further described under “Serpin Equity Issuance and Registration Rights Agreement” below.

Tungsten Advisors (through its Broker-Dealer, Finalis Securities LLC) (together with its affiliates, “Tungsten”) acted as the financial advisor to the Company in connection with the Licensing Agreement. As compensation for services rendered by Tungsten, the Company issued to Tungsten and its affiliates and designees an aggregate of 10.8694 shares of Series A-2 Preferred Stock.

Serpin Equity Issuance and Registration Rights Agreement

On September 29, 2025, in connection with the Licensing Agreement, we also entered into an Equity Issuance and Registration Rights Agreement (the “Serpin Registration Rights Agreement”) with Serpin.

Pursuant to the Serpin Registration Rights Agreement, we filed a Form S-3 registration statement registering the shares issued under the Serpin Registration Rights Agreement. The Form S-3 registration statement became effective on November 5, 2025. We also granted Serpin customary demand registration and indemnification rights and entered into customary issuer covenants.

Conversion of Preferred Stock to Common Stock

On November 21, 2025, we held a Special Meeting of our stockholders. At the Special Meeting, our stockholders approved for purposes of complying with the applicable provisions of Nasdaq Listing Rule 5635, the potential issuance of our Common Stock upon the conversion of the Company’s Series A Preferred Stock, Series A-1 Preferred Stock, and Series A-2 Preferred Stock. As a result, on November 21, 2025, all outstanding shares of Series A Preferred Stock, Series A-1 Preferred Stock and Series A-2 Preferred Stock converted into Common Stock at a ratio of one preferred stock to 10,000 shares of Common Stock.

On November 28, 2025, the Company entered into an Equity Distribution Agreement (the “Northland Agreement”) with Northland Securities, Inc., as sales agent, relating to the issuance and sale from time to time by the Company (the “ATM Program”) of shares of the Company’s common stock having an aggregate offering price of up to $8,558,712. We sold shares of Common Stock for gross proceeds of $89,762 pursuant to the Northland Agreement during the fourth quarter of 2025.

On January 9, 2026, the Company provided notice of its termination, effective January 9, 2026, of the Northland Agreement. The Company is not subject to any termination penalties related to the termination of the Northland Agreement.

Registered Offering and Private Placement

Subsequent to year end, on January 11, 2026, the Company entered into an agreement with Maxim Group LLC as placement agent in connection with the issuance and sale by the Company in a registered direct offering of 2,338,948 shares of its Common Stock (the “Registered Offering”), pursuant to an effective shelf registration statement on Form S-3 (File No. 333-287575). In a concurrent private placement (together with the Registered Offering, the “January 2026 Offering”), the Company agreed to sell (i) unregistered pre-funded warrants to purchase up to 2,047,089 shares of Common Stock (the “Pre-funded Warrants”) and (ii) unregistered common stock warrants to purchase up to 4,386,037 shares of Common Stock (the “Common Stock Warrants”) at a combined offering price of $2.85 per share of Common Stock and accompanying Common Stock Warrant and $2.8499 per Pre-funded Warrant and accompanying Common Stock Warrant. The January 2026 Offering closed on January 13, 2026, and the gross proceeds to the Company were approximately $12.5 million. The net proceeds of the January 2026 Offering were approximately $11.4 million after deducting placement agent fees and offering expenses payable by the Company.

On January 15, 2026, the Company filed a Form S-3 Registration Statement for the resale of up to 6,433,126 shares of the Company’s Common Stock consisting of (i) 2,047,089 shares of Common Stock underlying the Pre-Funded Warrants at an exercise price of $0.0001 per share; and (ii) 4,386,037 shares of Common Stock underlying the Common Stock Warrants to purchase shares of Common Stock at an exercise price of $3.28 per share. The Form S-3 Registration Statement was declared effective by the SEC on January 29, 2026.

Subsequent to year end, the Company received notification and payment for the exercise of 1,319,089 Pre-Funded Warrants at an exercise price of $0.0001 per share and 1,319,089 shares of Common Stock were issued. As of March 10, 2026, there are 728,000 Pre-Funded Warrants outstanding.

Corporate Information

The Company was originally formed on February 28, 2012 as a limited liability company under the laws of the State of Alabama as “Innovative Med Concepts, LLC.” On July 23, 2020, the Company changed its name from “Innovative Med Concepts, LLC” to “Virios Therapeutics, LLC.” The Company was then incorporated under the laws of the State of Delaware on December 16, 2020 through a corporate conversion just prior to the Company’s initial public offering (“IPO”). On October 7, 2024, the Company changed its name from “Virios Therapeutics, Inc.” to “Dogwood Therapeutics, Inc.” In addition, effective at the open of market trading on October 9, 2024, the Common Stock ceased trading under the ticker symbol “VIRI” and began trading on the Nasdaq Stock Market under the ticker symbol “DWTX”.

Available Information

The Securities and Exchange Commission (the “SEC”) maintains an internet site, www.sec.gov, that contains the Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments thereto, and other reports electronically filed with the SEC. The Company makes these documents that have been filed with the SEC available free of charge through the Company’s website, www.dwtx.com, by clicking the Investors tab and selecting “All SEC Filings” under the “SEC Filings” tab. Information included on the Company’s website is not part of this Annual Report on Form 10-K.