Apogee Therapeutics, Inc., through its subsidiary, operates as a biotechnology company that develops biologics for the treatment of atopic dermatitis (AD), asthma, chronic obstructive pulmonary disease (COPD), and related inflammatory and immunology indications. The company primarily develops APG777, a subcutaneous (SQ) extended half-life monoclonal antibody (mAb) for AD; and APG808, an SQ extended half-life mAb for COPD. Its earlier-stage programs comprise APG990, an SQ extended half-life mAb for the treatment of AD; and APG222, an extended half-life SQ antibodies for AD. Apogee Therapeutics, Inc. was incorporated in 2022 and is headquartered in Waltham, Massachusetts.

Viridian Therapeutics, Inc., a biotechnology company, discover and develops treatments for serious and rare diseases. The company's product pipeline includes VRDN-001, a monoclonal antibody targeting insulin-like growth factor-1 receptor that is in Phase 3 clinical trial for the treatment of thyroid eye disease (TED); and VRDN-003, a next generation IGF-1R humanized monoclonal antibodies targeting IGF-1R and incorporating half-life extension technology for the treatment of TED. It also provides VRDN-006 a preclinical program for autoimmune disease. In addition, the company offers VRDN-006 and VRDN-008 a preclinical program for autoimmune disease. The company was formerly known as Miragen Therapeutics, Inc. and changed its name to Viridian Therapeutics, Inc. in January 2021.Viridian Therapeutics, Inc. was founded in 2010 and is headquartered in Waltham, Massachusetts.

Zenas BioPharma, Inc., a clinical-stage biopharmaceutical company, engages in the development and commercialization of transformative immunology-based therapies. Its lead product candidate is obexelimab, a bifunctional monoclonal antibody for various indications, including immunoglobulin G4-related disease, multiple sclerosis, systemic lupus erythematosus, and warm autoimmune hemolytic anemia. The company also develops ZB002, an anti-TNFa monoclonal antibody; ZB004, a cytotoxic T-lymphocyte-associated antigen 4-immunoglobulin fusion; ZB001, an anti-insulin-like growth factor-1 receptor monoclonal antibody; and ZB005, an anti-active complement component 1s monoclonal antibody. Zenas BioPharma, Inc. was formerly known as Zenas BioPharma (Cayman) Limited and changed its name to Zenas BioPharma, Inc. in August 2023. The company was incorporated in 2019 and is based in Waltham, Massachusetts.

Compass Therapeutics, Inc., a clinical-stage oncology-focused biopharmaceutical company, engages in developing antibody-based therapeutics to treat various human diseases in the United States. The company's lead product candidates include CTX-009, a bispecific antibody that blocks Delta-like ligand 4 a ligand of Notch-1, and vascular endothelial growth factor A signaling pathways, which are critical to angiogenesis and tumor vascularization; and CTX-471, an IgG4 monoclonal antibody that is an agonist of CD137, a key co-stimulatory receptor on immune cells. It also develops CTX-8371, a bispecific inhibitor that targets PD-1 and PD-L1 checkpoint inhibitor antibodies. The company was founded in 2014 and is headquartered in Boston, Massachusetts.

Invivyd, Inc., a commercial-stage biopharmaceutical company, focuses on the discovery, development, and commercialization of antibody-based solutions for infectious diseases in the United States. The company developed INVYMAB, a platform that combines viral surveillance and predictive modeling with advanced antibody engineering. Its pipeline includes PEMGRADA (pemivibart) injection, a half-life extended investigational monoclonal antibody (mAb) for the prevention of COVID-19 in adults and adolescents; VYD2311, an mAb candidate which is in preclinical studies for the prevention or treatment for COVID-19; and adintrvimab, that is in phase 3 clinical trials for the prevention or treatment of COVID-19. The company also has discovery stage candidates for the prevention of seasonal influenza and COVID-19. It has a collaboration agreement with Adimab, LLC for the discovery and optimization of proprietary antibodies; and the Scripps Research Institute to perform research activities to identify vaccine candidates for the prevention, diagnosis or treatment of influenza or beta coronaviruses. The company was formerly known as Adagio Therapeutics, Inc. and changed its name to Invivyd, Inc. in September 2022. Invivyd, Inc. was incorporated in 2020 and is headquartered in Waltham, Massachusetts.

IGM Biosciences, Inc., a clinical-stage biotechnology company, develops Immunoglobulin M (IgM) antibodies for the treatment of cancer and autoimmune and inflammatory diseases. It develops Aplitabart, a Death Receptor 5 Agonist IgM antibody for the treatment of colorectal cancer; imvotamab, a CD20 x CD3 bispecific IgM antibody to treat myositis, as well as for the treatment of systemic lupus erythematosus and rheumatoid arthritis that is Phase Ib clinical trial; and IGM-2644, a bispecific T cell engaging IgM antibody targeting CD38 and CD3 proteins for the treatment of autoimmune diseases. IGM Biosciences, Inc. has a collaboration and license agreement with Genzyme Corporation to generate, develop, manufacture, and commercialize IgM antibodies. The company was formerly known as Palingen, Inc. and changed its name to IGM Biosciences, Inc. in 2010. IGM Biosciences, Inc. was incorporated in 1993 and is headquartered in Mountain View, California.

Leap Therapeutics, Inc., a biopharmaceutical company, acquires and develops antibody therapies for the treatment of cancer. Its lead product candidates include DKN-01, a monoclonal antibody that inhibits Dickkopf-related protein 1, which is in multiple ongoing clinical trials for treating esophagogastric and gynecologic cancers; and FL-301, a monoclonal antibody that targets cells that express Claudin18.2 on their cell surface and is in phase II clinical trial, as well as two preclinical antibody programs, FL-302 and FL-501. Leap Therapeutics, Inc. has an option and license agreement with NovaRock, Adimab, and BeiGene, Ltd. to develop and commercialize DKN-01 in Asia (excluding Japan), Australia, and New Zealand. The company was formerly known as HealthCare Pharmaceuticals, Inc. and changed its name to Leap Therapeutics, Inc. in November 2015. Leap Therapeutics, Inc. was incorporated in 2011 and is based in Cambridge, Massachusetts.

Aptevo Therapeutics Inc., a clinical-stage research and development biotechnology company, focuses on developing immunotherapeutic candidates for the treatment of various forms of cancer in the United States. It develops its products using ADAPTIR and ADAPTIR-FLEX platforms to generate monospecific, bispecific, and multi-specific antibody candidates capable of enhancing the human immune system against cancer cells. The company's lead clinical blood cancer candidate is APVO436 that is in Phase 1b/2 clinical trial for acute myelogenous leukemia. It is also developing ALG.APV-527, a novel investigational bispecific ADAPTIR candidate that is in Phase 1 clinical trial for NSCLC, head and neck, colorectal, pancreatic, breast, and other solid tumors; APVO603, a preclinical dual agonist bispecific ADAPTIR candidate for multiple solid tumors; APVO442, a novel bispecific candidate based on the ADAPTIR-FLEX platform technology for multiple solid tumors; and APVO711, a preclinical dual mechanism bispecific ADAPTIR candidate for prostate cancer. The company has a collaboration and option agreement with Alligator Bioscience AB to develop ALG.APV-527. Aptevo Therapeutics Inc. was incorporated in 2016 and is headquartered in Seattle, Washington.