You are given a text that consists of multiple sentences. Your task is to perform abstractive summarization on this text. Use your understanding of the content to express the main ideas and crucial details in a shorter, coherent, and natural sounding text.

LONDON--(BUSINESS WIRE)-- FORM 8.3 1 N/A G4S plc N/A 2 19,755,000 1.27% 19,755,000 1.27% 3 Class of relevant security Purchase/sale Number of securities Price per unit (GBp) Class of relevant security Product description Nature of dealing Number of reference securities Price per unit (GBp) 25p ordinary CFD reducing a long position 250,000 257.00 25p ordinary CFD reducing a long position 325,000 257.00 4 020 3826 4492

Answer: Form 8.3 - G4S plc