WASHINGTON–(BUSINESS WIRE)–Grain Management (“Grain” or the “Firm”), a leading private investment firm focused on broadband technology and the global communications sector, announced today the closing of its flagship fund, Grain Communications Opportunity Fund III, L.P. (“GCOF III”), with $2.25 billion in commitments, exceeding its target of $1.5 billion. Grain is also pleased to announce the closing of its third spectrum-focused investment vehicle, Grain Spectrum Holdings III, L.P. (“GSH III