QuidelOrtho Corporation (QDEL:NASDAQ) closed at $13.73 on October 23, 2026, up 1.85% on the day. The stock trades 61.4% below its 52-week high of $35.58 and 38.4% above its 52-week low of $9.92. Over the past year, it lost 55.0%. QuidelOrtho Corporation is part of the Health Care sector (Biotechnology: In Vitro & In Vivo Diagnostic Substances).
In 252 trading sessions since October 23, 2025, QDEL closed higher on 122 days (48%). Its best day was June 29, 2026 (+32.20%) and its worst was April 16, 2026 (-27.44%). The stock moved 10% or more in a single session 16 times. It opened at least 5% above the previous day's high 1 time.
Quidel Corporation develops, manufactures, and markets diagnostic testing solutions for applications primarily in infectious diseases, POC women's and general health, and gastrointestinal diseases. The company offers Sofia influenza A+B and QuickVue influenza tests to detect viral antigens of influenza type A and B; Sofia strep A fluorescent immunoassay and QuickVue Strep A tests to detect group A Streptococcal antigen from throat swabs; and Sofia Respiratory Syncytial Virus (RSV), QuickVue RSV, and Quidel Molecular RSV + human metapneumovirus tests for respiratory syncytial virus. It also provides various products to detect various herpes simplex virus (HSV) and herpes family viruses; H&V-Mix to isolate HSV, VZV, and Cytomegalovirus; R-Mix to detect Influenza A and B, RSV, Adenovirus, and Parainfluenza types 1, 2, and 3; Sofia S. Pneomoniae fluorescent immunoassay (FIA) to detect pneumococcal pneumonia and meningitis; Sofia Legionella FIA to detect Legionella pneumophila seorgroup 1 antigen; AmpliVue Bordetella assay to detect Bordetella pertussis; and Lyra Adenovirus assay to detect human adenovirus viral DNA. In addition, the company offers Sofia hCG fluorescent immunoassay and...
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