A holder apparatus (10,10',110,210) for safely holding one or more construction material panels (52) at a work site within a building under construction. The holder rests on flooring (100) and is locatable adjacent a selected wall structure (102) and includes a base (12,12',112,212) having a top load-bearing surface (14,114,214) canted at a small angle upwardly extending away from the adjacent wall. First and second stop rails (20,24) parallel to the wall define inner and outer stops for bottom edges (54) of a panel stack placeable onto the holder to be leaned against the wall (102), to assure that their bottom edges seated on the top surface (14,114,214) are at least a safe distance from the wall to prevent toppling, and a maximum distance to assure against sliding of the bottom panel edges away from the wall. An anti-tilt frame (40,40',140,240) extends upwardly from the base beyond the second stop rail (24) and angled toward the wall to prevent toppling of the panels (52).