Vera Therapeutics, Inc., a clinical stage biotechnology company, focuses on developing and commercializing treatments for patients with serious immunological diseases. Its lead product candidate is atacicept, a fusion protein self-administered as a subcutaneous injection that is in Phase III clinical trial for patients with immunoglobulin A nephropathy; and for treatment of lupus nephritis that is in Phase II clinical trial. It is also developing MAU868, a human monoclonal antibody for the treatment of BK viremia infections. The company was formerly known as Trucode Gene Repair, Inc. and changed its name to Vera Therapeutics, Inc. in April 2020. Vera Therapeutics, Inc. was incorporated in 2016 and is headquartered in Brisbane, California.

Tourmaline Bio, Inc. operates as a clinical biotechnology company that develops medicines for patients with life-altering immune and inflammatory diseases. It develops TOUR006, a human anti-IL-6 monoclonal antibody that selectively binds to interleukin-6, a key proinflammatory cytokine involved in the pathogenesis of many autoimmune and inflammatory disorders. The company's development pipeline comprises medicines and therapies for the atherosclerotic cardiovascular disease (ASCVD) and thyroid eye disease (TED). The company was formerly known as Tourmaline Bio, LLC and changed its name to Tourmaline Bio, Inc. in September 2022. Tourmaline Bio, Inc. was founded in 2021 and is headquartered in New York, New York.

Kyverna Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on developing cell therapies for patients suffering from autoimmune diseases. Its lead product candidate is KYV-101, an autologous CD19 CAR T-cell product candidate for the treatment of patients with lupus nephritis and systemic sclerosis that is in Phase I clinical trial; and for myasthenia gravis and multiple sclerosis that is in Phase II clinical trial. The company is also developing KYV-201, an allogeneic CD19 CAR T-cell product candidate that is in preclinical stage to treat multiple autoimmune diseases. In addition, it is developing product candidates to treat other autoimmune diseases, such as inflammatory bowel disease that includes Crohn's disease and ulcerative colitis. Kyverna Therapeutics, Inc. has a license and collaboration agreement with Intellia Therapeutics, Inc. to research and develop an allogeneic CD19-directed CAR cell therapy product; and with Kite to research and develop programs for the treatment, diagnosis, and prevention of autoimmune, inflammatory, and allogeneic stem cell transplant inflammatory diseases. The company was formerly known as BAIT Therapeutics, Inc. and changed its name to Kyverna Therapeutics, Inc. in October 2019. Kyverna Therapeutics, Inc. was incorporated in 2018 and is headquartered in Emeryville, California.

Climb Bio, Inc., a biotechnology company, focuses on developing therapies for autoimmune-driven inflammatory diseases. It develops budoprutug, an anti-CD19 monoclonal antibody for various autoimmune diseases, including systemic lupus erythematosus and lupus nephritis, immune thrombocytopenia, and membranous nephropathy. The company was formerly known as Eliem Therapeutics, Inc. and changed its name to Climb Bio, Inc. in October 2024. Climb Bio, Inc. was incorporated in 2018 and is headquartered in Wilmington, Delaware.

Cabaletta Bio, Inc., a clinical-stage biotechnology company, focuses on the discovery and development of engineered T cell therapies for patients with B cell-mediated autoimmune diseases. The company's lead product candidate is CABA-201, a fully human anti-CD19 binder for the treatment of Phase 1/2 clinical trials in dermatomyositis, anti-synthetase syndrome, immune-mediated necrotizing myopathy, lupus nephritis, non-renal systemic lupus erythematosus, systemic sclerosis, and generalized myasthenia gravis. It also develops DSG3-CAART, which is in Phase I/II clinical trial for the treatment of mucosal pemphigus vulgaris; and MuSK-CAART, an investigational cell therapy that is in Phase I/II clinical trial for treating patients with anti- muscle-specific kinase antibody positive myasthenia gravis. It has a collaboration with the University of Pennsylvania and the Children's Hospital of Philadelphia; Nanjing IASO Biotherapeutics Co., Ltd; Oxford Biomedica; and WuXi Advanced Therapies, Inc. The company was formerly known as Tycho Therapeutics, Inc. and changed its name to Cabaletta Bio, Inc. in August 2018. Cabaletta Bio, Inc. was incorporated in 2017 and is headquartered in Philadelphia, Pennsylvania.

Q32 Bio Inc., a clinical-stage biotechnology company, develops biologic therapeutics to restore healthy immune balance in patients with autoimmune and inflammatory diseases driven by pathological immune dysfunction in the United States. Its lead product candidate is ADX-097, a humanized anti-C3d monoclonal antibody fusion protein to restore complement regulation, which has completed Phase I clinical trial for the treatment of renal and other complement-mediated diseases of high unmet need, including lupus nephritis, immunoglobulin A nephropathy, complement component 3 glomerulopathy, and anti-neutrophil cytoplasmic antibody-associated vasculitis. The company is also developing Bempikibart (ADX-914), a fully human anti–interleukin-7 receptor alpha antagonist monoclonal antibody designed to re-regulate adaptive immune function by blocking signaling mediated by interleukin-7 and thymic stromal lymphopoietin that is Phase II clinical trial for the treatment of atopic dermatitis and alopecia areata. Q32 Bio Inc. was formerly known as AdMIRx Inc. and changed its name to Q32 Bio Inc. in April 2020. The company was founded in 2017 and is based in Waltham, Massachusetts.

Equillium, Inc., a clinical-stage biotechnology company, develops and sells products to treat severe autoimmune and inflammatory, or immuno-inflammatory disorders with unmet medical need. The company's lead product candidate is itolizumab (EQ001), a first-in-class monoclonal antibody that targets the immune checkpoint receptor CD6, which is in Phase III clinical trials for the treatment of acute graft-versus-host disease; completed Phase I clinical trial for the treatment of ulcerative colitis; and Phase I clinical trial for the treatment of lupus nephritis. It also develops EQ101 completed phase 1/2 for treatment of cutaneous T cell lymphoma and alopecia areata; and EQ302 to treat gastrointestinal indications. In addition, it serves dermatology, gastroenterology, rheumatology, hematology, transplant science, oncology, and pulmonology area. Equillium, Inc. has a research collaboration agreement with Vivtex Corporation to develop GI-targeted formulations for Bi-specific peptide therapy. The company was formerly known as Attenuate Biopharmaceuticals, Inc. and changed its name to Equillium, Inc. in May 2017. Equillium, Inc. was incorporated in 2017 and is headquartered in La Jolla, California.

Virios Therapeutics, Inc., a development-stage biotechnology company, focuses on developing novel antiviral therapies to treat diseases associated with a viral triggered abnormal immune response. The company's lead development candidate is the IMC-1, a fixed dose combination of famciclovir and celecoxib to treat fibromyalgia. It also develops IMC-2, a combination of valacyclovir and celecoxib for the treatment of managing the fatigue, sleep, attention, pain, autonomic function, and anxiety associated with long COVID. The company was formerly known as Innovative Med Concepts, LLC and changed its name to Virios Therapeutics, Inc. in July 2020. The company was founded in 2012 and is headquartered in Alpharetta, Georgia.