Cullinan Therapeutics, Inc., a biopharmaceutical company, focuses on developing oncology therapies for cancer patients in the United States. The company's lead program comprises CLN-619, a monoclonal antibody that is in Phase I clinical trial for the treatment of solid tumors. Its development portfolio also includes CLN-049, a humanized bispecific antibody that is in Phase I clinical trial for the treatment of acute myeloid leukemia or myelodysplastic syndrome; CLN-418, a human bispecific immune activator that is in Phase 1 clinical trial for the treatment of multiple solid tumors; and Zipalertinib, a bioavailable small-molecule for treating patients with non-small cell lung cancer. In addition, the company's development products comprise CLN-617, a fusion protein for the treatment of solid tumors; and CLN-978, a T cell engaging antibody for the treatment relapsed/refractory B-cell non-Hodgkin lymphoma. It has license and collaboration agreement with Adimab, LLC to discover and/or optimize antibodies; Harbour BioMed US Inc. for the development, manufacturing, and commercialization of CLN-418; and co-development agreement with Taiho Pharmaceutical Co., Ltd to develop Zipalertinib. Cullinan Therapeutics, Inc. was formerly known as Cullinan Oncology, Inc. and changed its name to Cullinan Therapeutics, Inc. in April 2024. Cullinan Therapeutics, Inc. was incorporated in 2016 and is headquartered in Cambridge, Massachusetts.

TScan Therapeutics, Inc., a clinical-stage biopharmaceutical company, develops T cell receptor-engineered T cell (TCR-T) therapies for the treatment of patients with cancer in the United States. The company's lead product candidates include TSC-100 and TSC-101 that is in Phase I clinical trial for the treatment of patients with hematologic malignancies to eliminate residual disease and prevent relapse after allogeneic hematopoietic cell transplantation. It also develops TSC-200, TSC-201, TSC-203, and TSC-204, which are in Phase 1 clinical trial, for the treatment of solid tumors; and TSC-202 to treat solid tumors. In addition, the company develops vaccines for infectious diseases, such as SARS-CoV-2. It has collaborations with Novartis Institutes for BioMedical Research, Inc. To discover and develop novel TCR-T therapies; and Amgen Inc. to identify antigens recognized by T cells in patients with Crohn's disease using TargetScan, a proprietary target discovery platform. TScan Therapeutics, Inc. was incorporated in 2018 and is headquartered in Waltham, Massachusetts.

Agenus Inc., a clinical-stage biotechnology company, discovers and develops immuno-oncology products in the United States and internationally. The company offers Retrocyte Display, an antibody expression platform for the identification of fully human and humanized monoclonal antibodies; and display technologies. It develops QS-21 Stimulon adjuvant, a saponin-based vaccine adjuvant. The company also develops Balstilimab, an anti-PD-1 antagonist that has completed Phase II clinical trial to treat second line cervical cancer; AGEN1181, an antigen 4 (CTLA-4) blocking antibody that is in Phase 2 clinical trial for the treatment of pancreatic cancer and and melanoma; AGEN2373, a CD137 monospecific antibody that is in Phase 1b clinical trial; AGEN1423, a CD73/TGFß TRAP antibody; AGEN1571, an ILT2 monospecific antibody that is in Phase 1 clinical trial; and BMS-986442, a TIGIT bispecific antibodies. In addition, it develops INCAGN1876, a GITR agonist; INCAGN2390, a TIM-3 monospecific antibody; INCAGN2385, a LAG-3 monospecific antibody; MK-4830, a monospecific antibody targeting ILT4 that is in Phase 2 clinical trial; UGN-301, a zalifrelimab intravesical solution for the treatment of cancers of the urinary tract that is in a Phase 1 clinical trial; and AGEN1884, a first-generation anti-CTLA-4 monospecific antibody. The company operates under Agenus, MiNK, Prophage, Retrocyte Display, and Stimulon trademarks. It has collaborations with Bristol-Myers Squibb Company, Betta Pharmaceuticals Co., Ltd., Incyte Corporation, Merck Sharpe & Dohme, and Gilead Sciences, Inc. The company was formerly known as Antigenics Inc. and changed its name to Agenus Inc. in January 2011. Agenus Inc. was founded in 1994 and is headquartered in Lexington, Massachusetts.

Pyxis Oncology, Inc., a clinical stage company, engages in the development of therapeutics to treat cancers. Its lead antibody-drug conjugates (ADC) product candidate is PYX-201, an investigational novel ADC consisting of human immunoglobulin G1 (IgG1), which is in Phase 1 clinical trial to treat patients with relapsed or refractory solid tumors; and lead immuno-oncology (IO) product candidate is PYX-106, an investigational fully human IgG1 Siglec-15-targeting antibody that is in Phase 1 clinical trial to treat patients with advanced solid tumors. The company is also developing PYX-107, a CD40 agonist with demonstrated anti-cancer activity in patients who previously progressed on PD-(L)1 inhibitors, which is in Phase 2 clinical trial for the treatment of solid tumors, such as soft tissue sarcomas, esophageal and gastroesophageal junction, cancers, and melanoma in combination with chemotherapy, radiation therapy, and immunotherapy. It has in-license agreement with Pfizer Inc. to develop and commercialize ADC product candidates directed to certain licensed targets, including PYX-201 and PYX-203, and products containing the ADC product candidates; and Biosion USA, Inc. for development, manufacture, and commercialization of PYX-106, an IO product candidate. Pyxis Oncology, Inc. was incorporated in 2018 and is headquartered in Boston, Massachusetts.

Mersana Therapeutics, Inc., a clinical stage biopharmaceutical company, develops antibody drug conjugates (ADC) for cancer patients with unmet needs. The company develops XMT-1660, a B7-H4-targeted Dolasynthen ADC candidate; and XMT-2056, an immunosynthen ADC. It has research and development collaborations with Janssen Biotech, Inc., Ares Trading S.A., Merck KGaA, and Asana BioSciences, LLC for the development of ADC product candidates. The company was formerly known as Nanopharma Corp. and changed its name to Mersana Therapeutics, Inc. in November 2005. Mersana Therapeutics, Inc. was incorporated in 2001 and is headquartered in Cambridge, Massachusetts.

Elicio Therapeutics, Inc., a clinical-stage biotechnology company, develops a pipeline of novel immunotherapies for the treatment of cancer. Its lead product candidate is ELI-002, a multivalent lymph node–targeted AMP peptide vaccine that is in Phase II clinical trial to target seven Kirsten rat sarcoma viral oncogene homolog driver mutations. The company is also developing ELI-007, a multivalent lymph node–targeted AMP peptide vaccine to target mutant v-raf murine sarcoma viral oncogene homolog B1 gene mutations found in solid tumors; and ELI-008, a multivalent lymph node–targeted AMP peptide vaccine to target p53 hotspot mutations. The company is headquartered in Boston, Massachusetts.

Cue Biopharma, Inc., a clinical-stage biopharmaceutical company, develops a novel class of injectable therapeutics to selectively engage and modulate targeted, disease relevant T cells directly within the patient's body. Its lead drug product candidate is CUE-101 for the treatment of human papilloma virus (HPV16+)-driven recurrent/metastatic head and neck cancer. The company is also developing CUE-102 targets Wilms' Tumor 1 protein in various cancers; CUE-103, a CUE-100 series drug product candidate; and Neo-STAT and RDI-STAT programs outside of oncology, including CUE-200, CUE-300, and CUE-400 series. It has collaboration agreements with LG Chem, Ltd. for the development of Immuno-STATs focused in the field of oncology; strategic collaboration and option agreement with Ono Pharmaceutical Co., Ltd. to advance CUE-401 for the treatment of autoimmune and inflammatory diseases; and license agreement with Albert Einstein College of Medicine. The company was formerly known as Imagen Biopharma, Inc. and changed its name to Cue Biopharma, Inc. in October 2016. Cue Biopharma, Inc. was incorporated in 2014 and is headquartered in Boston, Massachusetts.

Imunon, Inc., a clinical-stage biotechnology company, engages in the development of immunotherapies and vaccines to treat cancer and infectious diseases. The company's lead clinical program IMNN-001, a DNA-based immunotherapy for the localized treatment of ovarian cancer that is in Phase II clinical development. Its preclinical stage products include IMNN-101, a COVID-19 booster vaccine; IMNN-102 for the treatment of Lassa virus; and IMNN-201, a Trp2 tumor associated antigen cancer vaccine in melanoma. In addition, the company develops non-viral DNA technology across four modalities, such as TheraPlas for the coding of proteins and cytokines in the treatment of solid tumors; PlaCCine for the coding of viral antigens that can elicit a strong immunological response; FixPlas for the application of Imunon's DNA technology to produce universal cancer vaccines; and IndiPlas, which is in the discovery phase for the development of personalized cancer vaccines or neoepitope cancer vaccines. Imunon, Inc. was formerly known as Celsion Corporation and changed its name to Imunon, Inc. in September 2022. The company was founded in 1982 and is headquartered in Lawrenceville, New Jersey.