Vascular Endothelial Growth Factor B segmentation by application reveals four primary demand drivers: oncology, ophthalmology, cardiovascular disease, and ancillary therapeutic areas. In oncology, VEGF‑B is investigated as a biomarker and therapeutic target for tumor angiogenesis, accounting for roughly 45 % of total market revenue due to extensive clinical‑trial pipelines and high‑value biologics. Ophthalmology, focused on neovascular age‑related macular degeneration and diabetic retinopathy, contributes about 30 % as intravitreal formulations dominate regional formularies. The cardiovascular segment, encompassing peripheral artery disease and myocardial ischemia, represents roughly 20 % of sales, driven by emerging gene‑therapy vectors and combination regimens. Miscellaneous applications—such as wound healing, renal disease, and research reagents—collectively hold an estimated 5 % share. These proportions shape the overall Vascular Endothelial Growth Factor B market size, with the oncology and ophthalmology applications jointly generating the bulk of commercial volume, while the smaller niches sustain incremental growth and diversification. Consequently, investment decisions and pipeline prioritization are calibrated to these application‑specific revenue potentials.