In 2003 ownership of Rolls-Royce plc was passed to Rolls-Royce Group plc incorporated 21 March 2003 which issued its own new shares for payment to the previous shareholders. In 2011 in the same way Rolls-Royce Group plc passed ownership on 23 May 2011 to Rolls-Royce Holdings plc a wholly new company incorporated 10 February 2011. Rolls-Royce plc remains the principal trading company. Rolls-Royce Holdings plc, like its immediate predecessor, is merely a holding company.
1 Crimson = 1.1 tons (2200 lbs.) per cubic yard. 2  Rock (57 & 89) = 1.2 tons (2400 lbs.) per cubic yard. 3  Lime Rock (919) = 1.25 tons (2500 lbs.) per cubic yard.  River Rock (all) = 1.325 tons (2650 lbs.) per cubic yard.
Material Weight â Pounds per Cubic Yard Asphalt 2,700 lb. Iron (wrought) 13,100 lb. Brush/Branches (loose) 250 lb. Leaves (loose, dry) 150 lb. Brush/Branches (chipped â 3â screen) 600 lb. Leaves (vacuumed, dry) 400 lb. Concrete (gravel or stone mix) 4,050 lb. Leaves (wet or compacted) 550 lb. Concrete (average wet mix) 3,730 lb. Limestone (solid) 4,480 lb. Clay (dry) 2,300 lb. Limestone (crushed) 2,565 lb. Clay (wet) 2,970 lb. Paper (solid - average) 1,565 lb. Crushed Stone 2,700 lb. Plywood Sheets 800 lb.