Kymera Therapeutics, Inc., a biopharmaceutical company, focuses on discovering and developing novel small molecule therapeutics that selectively degrade disease-causing proteins by harnessing the body's own natural protein degradation system. It engages in developing IRAK4 program, which is in Phase II clinical trial for the treatment of immunology-inflammation diseases, including hidradenitis suppurativa, atopic dermatitis; STAT3 program for the treatment of hematologic malignancies and solid tumors, as well as autoimmune diseases and fibrosis; and MDM2 program to treat hematological malignancies and solid tumors. The company develops STAT6, a Type 2 inflammation in allergic diseases; and TYK2, a treatment for inflammatory bowel disease, psoriasis, psoriatic arthritis, and lupus. The company was incorporated in 2015 and is headquartered in Watertown, Massachusetts.

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.

KalVista Pharmaceuticals, Inc., a clinical stage pharmaceutical company, engages in the discovery, development, and commercialization of drug therapies inhibitors for diseases with unmet needs. The company's product candidate is Sebetralstat, a small molecule plasma kallikrein inhibitor targeting the disease of hereditary angioedema (HAE). It develops Factor XIIa, an oral inhibitor for the treatment of HAE which is in preclinical trial. In addition, the company is developing an orally disintegrating tablet formulation, including KONFIDENT-KID for pediatric use with HAE; KONFIDENT-S for adolescent and adult patients with type I or type II HAE; and KONFIDENT for a potential oral therapy for HAE attacks. The company is headquartered in Cambridge, 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.

Aldeyra Therapeutics, Inc., a biotechnology company, develops and commercializes medicines for immune-mediated diseases. Its lead product candidate is reproxalap, a reactive aldehyde species (RASP)modulator, which is in Phase III clinical trial for the treatment of dry eye diseases. The company also develops ADX-629, an orally administered RASP modulator for treatment of COVID-19, atopic asthma, psoriasis, and alcohol intoxication; and ADX-2191, a dihydrofolate reductase inhibitor for the treatment retinitis pigmentosa, as well as rare retinal diseases characterized by inflammation and vision loss. In addition, it develops ADX-246 in systemic immune-mediated disease; and ADX-248 in geographic atrophy. The company was formerly known as Aldexa Therapeutics, Inc. and changed its name to Aldeyra Therapeutics, Inc. in March 2014. Aldeyra Therapeutics, Inc. was incorporated in 2004 and is based in Lexington, Massachusetts.

Avalo Therapeutics, Inc., a clinical stage biotechnology company, focuses on the development of therapies for the treatment of immune dysregulation in the Unites States. The company's drug candidates include AVTX-009, an Anti-IL-1ß monoclonal antibody which is under Phase I targeting inflammatory diseases; and AVTX-008, a fully human B and T lymphocyte attenuator agonist fusion protein for the treatment of immune dysregulation disorders. It also develops Quisovalimab (AVTX-002), an Anti-LIGHT mAb which is in phase II for immune-inflammatory diseases. The company was formerly known as Cerecor Inc. and changed its name to Avalo Therapeutics, Inc. in August 2021. Avalo Therapeutics, Inc. was incorporated in 2011 and is headquartered in Rockville, Maryland.

Akari Therapeutics, Plc, a clinical-stage biopharmaceutical company, focuses on developing advanced therapies for autoimmune and inflammatory diseases. Its lead product candidate is nomacopan, a second-generation complement inhibitor that prevents inflammatory and prothrombotic activities. The company also develops PASylated-nomacopan, which is in preclinical development for the treatment of geographic atrophy secondary to dry age-related macular degeneration; and hematopoietic stem cell transplant-related thrombotic microangiopathy (HSCT-TMA) combined with nomacopan, which is in phase 3 clinical development for the treatment of pediatric HSCT-TMA. The company is headquartered in Boston, Massachusetts.

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.