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Caribou Biosciences, Inc., a clinical-stage biopharmaceutical company, engages in the development of genome-edited allogeneic cell therapies for the treatment of hematologic malignancies in the United States and internationally. Its lead product candidate is CB-010, an allogeneic anti-CD19 CAR-T cell therapy that is in phase 1 clinical trial to treat relapsed or refractory B cell non-Hodgkin lymphoma. The company also develops CB-011, an allogeneic anti-BCMA CAR-T cell therapy that is in phase 1 clinical trial for the treatment of relapsed or refractory multiple myeloma; and CB-012, an allogeneic anti-CD371 CAR-T cell therapy that is in phase 1 clinical trial for the treatment of relapsed or refractory acute myeloid leukemia. Caribou Biosciences, Inc. was incorporated in 2011 and is headquartered in Berkeley, California.

CRISPR Therapeutics is a gene-editing company focused on developing transformative gene-based medicines for serious diseases using its proprietary CRISPR/Cas9 platform. CRISPR/Cas9 is a revolutionary gene-editing technology that allows for precise, directed changes to genomic DNA. CRISPR Therapeutics has established a portfolio of therapeutic programs across a broad range of disease areas including hemoglobinopathies, oncology, regenerative medicine and rare diseases. To accelerate and expand its efforts, CRISPR Therapeutics has established strategic collaborations with companies including Bayer, Vertex Pharmaceuticals and ViaCyte, Inc. CRISPR Therapeutics AG is headquartered in Zug, Switzerland, with its wholly-owned U.S. subsidiary, CRISPR Therapeutics, Inc., and R&D operations based in Cambridge, Massachusetts, and business offices in San Francisco, California and London, United Kingdom. For more information, please visit www.crisprtx.com.

Gilead Sciences, Inc., a biopharmaceutical company, discovers, develops, and commercializes medicines in the areas of unmet medical need in the United States, Europe, and internationally. The company provides Biktarvy, Genvoya, Descovy, Odefsey, Truvada, Complera/ Eviplera, Stribild, Sunlencs, and Atripla products for the treatment of HIV/AIDS; Veklury, an injection for intravenous use, for the treatment of COVID-19; and Epclusa, Harvoni, Vemlidy, and Viread for the treatment of viral hepatitis. It also offers Yescarta, Tecartus, and Trodelvy products for the treatment of oncology; Letairis, an oral formulation for the treatment of pulmonary arterial hypertension; and AmBisome, a liposomal formulation for the treatment of serious invasive fungal infections. The company has collaboration agreements with Arcus Biosciences, Inc.; Merck Sharp & Dohme Corp.; Pionyr Immunotherapeutics Inc.; Tizona Therapeutics, Inc.; Galapagos NV; Janssen Sciences Ireland Unlimited Company; Japan Tobacco, Inc.; Dragonfly Therapeutics, Inc.; Arcellx, Inc.; Everest Medicines; Merck & Co, Inc.; Tentarix Biotherapeutics Inc.; and Assembly Biosciences, Inc. It also has research collaboration, option, and license agreement with Merus N.V. for the discovery of novel dual tumor-associated antigens (TAA) targeting trispecific antibodies. The company was incorporated in 1987 and is headquartered in Foster City, California.

Intellia Therapeutics, Inc., a genome editing company, focuses on the development of curative therapeutics. The company's in vivo programs include NTLA-2001, which is in Phase 1 clinical trial for the treatment of transthyretin amyloidosis; NTLA-2002 for the treatment of hereditary angioedema; and NTLA-3001 for alpha-1 antitrypsin deficiency associated lung disease. It also focusses on programs comprising hemophilia A and hemophilia B; and research of proprietary programs focused on developing engineered cell therapies to treat various cancers and autoimmune diseases. In addition, the company offers tools comprising of Clustered, Regularly Interspaced Short Palindromic Repeats/CRISPR associated 9 (CRISPR/Cas9) system. It has license and collaboration agreement with Regeneron Pharmaceuticals, Inc. to co-develop potential products for the treatment of hemophilia A and hemophilia B; AvenCell Therapeutics, Inc. to develop allogeneic universal CAR-T cell therapies, and co-develop and co-commercialize allogeneic universal CAR-T cell products for an immuno-oncology indication; SparingVision SAS to develop novel genomic medicines utilizing CRISPR/Cas9 technology for the treatment of ocular diseases; Kyverna Therapeutics, Inc. for the development of an allogeneic CD19 CAR-T cell therapy for the treatment of a variety of B cell-mediated autoimmune diseases; and ONK Therapeutics, Ltd. for the development of engineered NK cell therapies to cure patients with cancer. Intellia Therapeutics, Inc. was incorporated in 2014 and is headquartered in Cambridge, Massachusetts.

Pfizer Inc. discovers, develops, manufactures, markets, distributes, and sells biopharmaceutical products in the United States, Europe, and internationally. The company offers medicines and vaccines in various therapeutic areas, including cardiovascular metabolic, migraine, and women's health under the Eliquis, Nurtec ODT/Vydura, Zavzpret, and the Premarin family brands; infectious diseases with unmet medical needs under the Prevnar family, Abrysvo, Nimenrix, FSME/IMMUN-TicoVac, and Trumenba brands; and COVID-19 prevention and treatment, and potential future mRNA and antiviral products under the Comirnaty and Paxlovid brands. It also provides medicines and vaccines in various therapeutic areas, such as biosimilars for chronic immune and inflammatory diseases under the Xeljanz, Enbrel, Inflectra, Litfulo, Velsipity, and Cibinqo brands; amyloidosis, hemophilia, endocrine diseases, and sickle cell disease under the Vyndaqel family, Oxbryta, BeneFIX, Somavert, Ngenla, and Genotropin brands; sterile injectable and anti-infective medicines under the Sulperazon, Medrol, Zavicefta, Zithromax, and Panzyga brands; and biologics, small molecules, immunotherapies, and biosimilars under the Ibrance, Xtandi, Inlyta, Bosulif, Mektovi, Padcev, Adcetris, Talzenna, Tukysa, Elrexfio, Tivdak, Lorbrena, and Braftovi brands. In addition, the company involved in the contract manufacturing business. It serves wholesalers, retailers, hospitals, clinics, government agencies, pharmacies, individual provider offices, retail pharmacies, and integrated delivery systems. The company has collaboration agreements with Bristol-Myers Squibb Company; Astellas Pharma US, Inc.; Merck KGaA; and BioNTech SE. Pfizer Inc. was founded in 1849 and is headquartered in New York, New York.

Arcus Biosciences, Inc., a clinical-stage biopharmaceutical company, develops and commercializes cancer therapies in the United States. The company's pipeline products include Domvanalimab, an anti-TIGIT antibody, which is in Phase 2 and Phase 3 clinical trial; and AB308, an investigational anti-TIGIT monoclonal antibody, which is in Phase 1b clinical trial to study people with advanced solid and hematologic malignancies. It also develops Etrumadenant, a dual A2a/A2b adenosine receptor antagonist, which is in Phase 2 clinical trial; Quemliclustat, a small-molecule CD73 inhibitor, which is Phase 1b and Phase 2 clinical trial; Zimberelimab, an anti-PD-1 antibody, which is in Phase 2 clinical trial for metastatic cell lung cancer and monotherapy; and AB521, an oral and small-molecule inhibitor of HIF-2a, which is in Phase 1 clinical trial for the treatment of Von Hippel-Lindau disease. In addition, the company's preclinical pipeline products include AB598, a CD39 antibody; and AB801, a small molecule Axl inhibitor. It has a clinical collaboration with AstraZeneca to evaluate domvanalimab in combination with durvalumab in a registrational phase 3 clinical trial in patients with unresectable Stage 3 NSCLC; and BVF Partners L.P. to support the discovery and development of compounds for the treatment of inflammatory diseases. Arcus Biosciences, Inc. was incorporated in 2015 and is headquartered in Hayward, California.

Regeneron Pharmaceuticals, Inc. discovers, invents, develops, manufactures, and commercializes medicines for treating various diseases worldwide. The company's products include EYLEA injection to treat wet age-related macular degeneration and diabetic macular edema; myopic choroidal neovascularization; diabetic retinopathy; neovascular glaucoma; and retinopathy of prematurity. It also provides Dupixent injection to treat atopic dermatitis and asthma in adults and pediatrics; Libtayo injection to treat metastatic or locally advanced cutaneous squamous cell carcinoma; Praluent injection for heterozygous familial hypercholesterolemia or clinical atherosclerotic cardiovascular disease in adults; REGEN-COV for covid-19; and Kevzara solution for treating rheumatoid arthritis in adults. In addition, the company offers Inmazeb injection for infection caused by Zaire ebolavirus; ARCALYST injection for cryopyrin-associated periodic syndromes, including familial cold auto-inflammatory syndrome and muckle-wells syndrome; and ZALTRAP injection for intravenous infusion to treat metastatic colorectal cancer; and develops product candidates for treating patients with eye, allergic and inflammatory, cardiovascular and metabolic, infectious, and rare diseases; and cancer, pain, and hematologic conditions. It has collaboration with Mammoth Biosciences, Inc. to research, develop and commercialize in vivo CRISPR-based gene editing therapies for multiple tissues and cell types. The company was incorporated in 1988 and is headquartered in Tarrytown, New York.

Vertex Pharmaceuticals Incorporated, a biotechnology company, engages in developing and commercializing therapies for treating cystic fibrosis (CF). It markets TRIKAFTA/KAFTRIO for people with CF with at least one F508del mutation for 2 years of age or older; SYMDEKO/SYMKEVI for people with CF for 6 years of age or older; ORKAMBI for CF patients 1 year or older; and KALYDECO for the treatment of patients with 1 year or older who have CF with ivacaftor. The company's pipeline includes VX-522, a CFTR mRNA therapeutic designed to treat the underlying cause of CF, which is in Phase 1 clinical trial; VX-548, a non-opioid medicine for the treatment of acute and neuropathic pain which is in Phase 3 clinical trial; Exa-cel, for the treatment of sickle cell disease and transfusion-dependent beta thalassemia which is in Phase 2/3 clinical trial. In addition, it provides inaxaplin for the treatment of APOL1-mediated focal segmental glomerulosclerosis and co-morbidities, such as hypertension which is in single Phase 2/3; VX- 880 and VX-264, treatment for Type 1 Diabetes which is in Phase 1/2 clinical trial; VX-970, which is in Phase 2 clinical trial for the treatment of cancer; and VX-803 and VX-984 for treatment of cancer in Phase 1 clinical trial. Further, it sells the products to specialty pharmacy and specialty distributors in the United States, as well as retail pharmacies, hospitals, and clinics. Additionally, the company has collaborations with CRISPR Therapeutics AG.; Moderna, Inc.; Entrada Therapeutics, Inc.; Arbor Biotechnologies, Inc.; Mammoth Biosciences, Inc.; and Verve Therapeutics., as well as collaborations with Tevard Biosciences to develop novel tRNA-based therapies for duchenne muscular dystrophy. Vertex Pharmaceuticals Incorporated was founded in 1989 and is headquartered in Boston, Massachusetts.

SPDR S&P Biotech ETF (the Fund) seeks to closely match the returns and characteristics of the S&P Biotechnology Select Industry Index. The S&P Biotechnology Select Industry Index represents the biotechnology sub-industry portion of the S&P Total Markets Index. The S&P TMI tracks all the United States common stocks listed on the New York Stock Exchange, American Stock Exchange, National Association of Securities Dealers Automated Quotation (NASDAQ) National Market and NASDAQ Small Cap exchanges. The Biotech Index is a modified equal weight index. SSgA Funds Management, Inc. is the Fund's investment advisor.