The 12th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging (PIXEL2026) will cover a wide range of topics related to pixel detector technology. Developments and applications will be discussed for charged particle tracking in High Energy Physics, Nuclear Physics, and Astrophysics, as well as X-ray imaging in Astronomy, Biology, Medicine, and Materials Science. The conference program will also include presentations on front-end and back-end electronics, radiation effects, low-mass mechanics and construction techniques, and emerging technologies such as monolithic and 3D- integrated detectors. All sessions will be plenary, and talks will be selected from submitted abstracts.