Oncology Focused Pipeline​

OBI’s mission is to provide patients with effective targeted treatments. Precision Medicine is at the heart of what we do. We are committed to developing a differentiated portfolio of antibody-drug conjugates (ADCs) that selectively target clinically relevant cancer biomarkers, including TROP2, Nectin-4, HER2, bispecific TROP2 x HER2, cMET x HER3, and other promising targets—with the ultimate aim of improving clinical outcomes and enhancing patients’ quality of life.

This table provides an overview of our pipeline.

Molecule Name

Target

Potential Indications

Status

Modality

Molecule Name

OBI-992

Target:

TROP2

Potential Indications:

Advanced Solid Tumors

Status:

Phase 1

Modality:

ADC

OBI-992 is a TROP2-targeted antibody-drug conjugate (ADC) that carries a potent topoisomerase I inhibitor payload (Drug-to-Antibody Ratio, DAR is 4) via a cysteine conjugated, hydrophilic and enzyme-cleavable linker. OBI-992 remains stable in circulation and delivers this cytotoxic payload to TROP2-expressing tumor cells, leading to tumor cell death while avoiding off-target toxicities. TROP2 is highly expressed in a variety of solid tumors with no or low expression in normal tissues, rendering it an ideal target for cancer therapy.​

OBI-992 demonstrates unique target-binding characteristics, potent antitumor efficacy, improved pharmacokinetics, and a favorable safety profile in preclinical in-vitro and in-vivo models. The results of animal studies were published and featured as the cover story in the of “Molecular Cancer Therapeutics”. The in vitro findings were published in “Scientific Reports” in March 2025. In September 2025, additional preclinical PK/PD and safety results were published in ”American Association for Cancer ResearchJournal. The encouraging preclinical results support further clinical investigation of OBI-992. ​

The US FDA approved the IND application for a Phase 1/2 Study of OBI-992 in Jan 2024 (NCT06480240) and subsequently granted Orphan Drug Designation for the treatment of gastric cancer in Aug 2024. Although the Phase 1/2 study is no longer enrolling participants, the study remains ongoing in the United States and Taiwan to evaluate OBI-992’s safety, PK, and preliminary efficacy. OBI has licensed the TROP2 targeting antibody amino acid sequence Biosion, Inc. since December 2021, holding exclusive rights worldwide except in China. OBI holds worldwide commercial rights to OBI-992, except for the rights pertaining to the antibody in China.

Molecule Name

OBI-902

Target:

TROP2

Potential Indications:

Advanced Solid Tumors

Status:

Phase 1

Modality:

ADC

OBI-902 is OBI’s next-generation TROP2-targeted ADC. OBI-902 is the first ADC powered by OBI’s proprietary glycan-based site-specific platform GlycOBI®, a dual-function enzyme, EndoSymeOBI®, and a novel linker, HYPrOBI®.

This innovative platform overcomes the heterogeneity issues inherent in traditional, random conjugation processes. We leverage the unique enzymatic advantages of EndoSymeOBI® and integrate them into a streamlined single-pot process. This ensures site-specific conjugation, yielding a uniform ADC product with a highly controlled Drug-to-Antibody Ratio. The result is a homogenous molecule that promises enhanced therapeutic efficacy and a more predictable safety profile compared to traditional, randomly conjugated ADCs.

Compared to benchmark TROP2 ADCs, OBI-902 demonstrated a favorable and differentiated PK profile with excellent stability in circulation, extended exposure in tumors, and durable antitumor activity in various cancer models. A favorable safety profile of OBI-902 was shown in a repeat dose toxicity study in monkeys.

U.S. FDA approved the IND application for a Phase 1/2 Study of OBI-902 in April 2025. (NCT07124117) The Phase 1/2 study is currently enrolling patients in the United States and Taiwan to evaluate OBI-902’s safety, PK, and preliminary efficacy.

Molecule Name

OBI-904

Target:

Nectin-4

Potential Indications:

Advanced Solid Tumors

Status:

Preclinical

Modality:

ADC

OBI-904 is an antibody-drug conjugate (ADC) comprised of a monoclonal antibody specifically targeting Nectin-4 (Nectin cell adhesion molecule 4), linked to a potent topoisomerase I inhibitor payload (Drug-to-Antibody Ratio, DAR is 8) through OBI’s proprietary GlycOBI® ADC enabling technologies, powered by a dual-function enzyme, EndoSymeOBI®, and a novel linker, HYPrOBI®. It is a potentially first-in-class and best-in-class glycan-based ADC designed to target multiple cancer types that express Nectin-4. Potent efficacy has been shown across several animal disease models. Preclinical animal study results were presented as a poster and published at American Association for Cancer Research (AACR 2025).

OBI-904 also demonstrated a favorable safety profile in a repeat dose toxicity study in monkeys.

Molecule Name

OBI-201

Target:

TROP2 x HER2

Potential Indications:

Undisclosed

Status:

Preclinical

Modality:

Bispecific ADC

OBI-201 is a TROP2 x HER2 bispecific ADC generated by OBI GlycOBI® ADC enabling technologies, powered by a dual-function enzyme, EndoSymeOBI®, and a novel linker, HYPrOBI®, and conjugated with a topoisomerase I inhibitor. OBI-201 offers several advantages over mono-specific TROP2 or HER2 ADCs. By targeting both antigens, it broadens tumor coverage, especially in cancers with heterogeneous or low expression of either target. Dual targeting can enhance tumor selectivity, binding avidity, and internalization, improving payload delivery to cancer cells while potentially reducing toxicity to normal cells. OBI-201 may overcome resistance associated with downregulation of targets after treatment as shown by some monospecific ADCs.

Animal studies revealed that OBI-201 demonstrated significantly superior anti-tumor activity compared to single-target ADCs in drug-resistant breast cancer models with extremely low HER2 expression. OBI-201 was able to sustain tumor growth suppression, indicating its potential to overcome multiple drug-resistance mechanisms. OBI-201 is a next-generation bispecific ADC poised to break through the limitations of single-target ADCs, offering patients a more comprehensive and durable treatment option.

Molecule Name

BsADC / Dual Payload ADC

Target:

cMet x HER3

Potential Indications:

Undisclosed

Status:

Discovery

Modality:

Bispecific Dual-payload ADC

In clinical practice, EGFR-targeted therapies have become a key strategy for treating non-small cell lung cancer (NSCLC) and colorectal cancer (CRC) patients. However, tumors often rapidly develop resistance by upregulating cMET and HER3 that, in turn, sustain tumor growth. Moreover, high expressions of cMET and HER3 have been observed in gastric cancer, head and neck cancer, and various other solid tumors, further underscoring the unmet medical needs.

To address this challenge, OBI Pharma leverages its proprietary GlycOBI DUO™ platform and HYPrOBI® linker to develop a novel bispecific dual-payload antibody–drug conjugate (BsDpADC). This therapeutic agent simultaneously targets cMET and HER3 while delivering synergistic cytotoxic agents, effectively combating tumor resistance and heterogeneity. This breakthrough design not only addresses an unmet medical need but also represents a forward-looking strategy for next-generation ADC development.

It holds meaningful potential to overcome resistance to existing EGFR-targeted therapies, offering patients more targeted treatment options while delivering substantial clinical value.

Molecule Name

OBI-3424

Target:

AKR1C3

Potential Indications:

Liver (HCC) and T-ALL

Status:

Phase 2

Modality:

Prodrug

OBI-3424 is a first-in-class chemotherapeutic prodrug designed to selectively target cancer cells that overexpress the enzyme aldo-keto reductase family 1 member C3 (AKR1C3), thereby sparing healthy, normal cells. Preclinical studies demonstrated that OBI-3424 exhibits significant anti-tumor activity in a range of xenograft mouse models, including those for gastric, lung, liver, and pancreatic cancers. OBI-3424 has been granted Orphan Drug Designation (ODD) for the treatment of both hepatocellular carcinoma (HCC) and acute lymphoblastic leukemia (ALL). OBI-3424 demonstrated good tolerability in the Phase I trial conducted by OBI. The following clinical trials are currently underway in collaboration with Ascentawits* and SWOG, respectively.  Ascentawits had finished the enrollment of a phase II trial in HCC (CTR20191399), and a phase I study (CTR20201915) in ALL is ongoing. SWOG Cancer Research Network is conducting a Phase II clinical trial in T-ALL (NCT04315324).

*OBI acquired the worldwide rights (except for the rights in Taiwan, Japan, South Korea, Singapore, Malaysia, Thailand, Turkey, India, which are owned by Ascentawits as AST-3424; And the rights in China, Hong Kong, Macao, which are owned by Zhejiang Hisun Pharmaceutical Co. Ltd.) of OBI-3424 from Threshold Pharmaceuticals, Inc.

Expanded Access

STATEMENT OF OBI’S POSITION ON EXPANDED ACCESS (COMPASSIONATE USE)

OBI Pharma, Inc. (together with its wholly-owned subsidiary OBI Pharma USA, Inc., “OBI Pharma”) is a clinical stage biotechnology company committed to the development of safe and effective products for use in oncology areas of high unmet medical need. Our goal is to make available access to our unapproved products (investigational products) through participation in clinical trials and through expanded access programs. Expanded access programs allow for the use of investigational products outside a clinical trial when the primary purpose is to treat a serious, life-threatening condition.

In cases where a clinical trial is not an option, and the patient has exhausted all available treatment options, regulators/health authorities may grant permission for us to provide a treating physician with an investigational product pre-approval. Such individual use of an investigational product pre-approval is often called “expanded access” or “compassionate use” though other names may be used. OBI Pharma commonly refers to these requests as “expanded access”.

OBI Pharma is committed to making available our unapproved products (investigational products) through expanded access in cases where:

  • the patient’s condition is severe or life-threatening,
  • the patient has exhausted all other approved treatment options that the patient is able to tolerate, and
  • the patient is ineligible to participate in existing clinical trials.

Access to an investigational product is possible when:

  • the investigational product is actively being used in clinical trials and not approved for the indication in the jurisdiction concerned,
  • there is sufficient clinical data available for the investigational product and the disease condition to anticipate that any potential benefit from treatment is likely to outweigh any potential risks to the patient,
  • there is adequate data to permit selection of an appropriate dose level for the patient,
  • there is sufficient product supply to support both the ongoing clinical trials and the expanded access request, and
  • the expanded access request will not compromise the integrity of ongoing clinical trials or delay regulatory filings.

OBI Pharma may discontinue expanded‑access supply for an individual patient or program if (i) clinical data reveal an unfavorable risk–benefit profile, (ii) supply becomes unavailable, or (iii) regulatory authorities request suspension.

Our partnership with treating physicians:

The treating physician is solely responsible for overseeing patient treatment and safety. The physician is also solely responsible for obtaining Health Authority and Institutional Review Board approvals and patient consent prior to use.

Learn More:

If you are a physician who is interested in learning more about our investigational products, or participating in our clinical trials, please submit a request to expandedaccess@obipharma.com. We anticipate acknowledging receipt of requests sent to this email within five business days.

If you are a patient who is interested in accessing our investigational products, please speak with your physician. If you have additional questions, please contact expandedaccess@obipharma.com. You may also learn more about ongoing clinical trials by going to www.clinicaltrials.gov.

 

DISCLAIMER: An existing program does not guarantee availability in all jurisdictions. Various regulatory mechanisms exist in different jurisdictions to provide Early Access to new medicines and as a result, jurisdiction-specific variations for Early Access will occur. Any Early Access to medicines must always comply with the applicable jurisdiction-specific laws and regulations including investigational product importation requirements.