This interactive visualization displays a hierarchical company structure as a collapsible tree diagram, where each node is rendered as a colored box representing different data types such as products, clinical trials, or disease areas. Users can click nodes to expand or collapse branches, with smooth animations transitioning the tree layout. Built with D3.js v3, the visualization uses SVG for rendering, includes zoom and drag functionality via d3.behavior.zoom, and loads hierarchical data from a JSON file. The code also implements custom tooltips and drop shadows to enhance readability of the node information.