CME: http://www.cmegroup.com/trading/cds/cds-data.html
Eurex: http://www.eurexclearing.com/markets/creditclear/credit_clear_volume_en.html
ICE Clear EU: https://www.theice.com/clear_europe_cds.jhtml
ICE Trust US: https://www.theice.com/ice_trust.jhtml
LCH.Clearnet SA: http://www.lchclearnet.com/cds/data.asp
LCH.Clearnet SwapClear: http://www.lchclearnet.com/swaps/volumes/
DTCC (Warehouse Trust): http://www.dtcc.com/products/derivserv/data/index.php
TriOptima: http://www.trioptima.com/services/interest_rate_trade_reporting_repository
TriOptima: http://www.trioptima.com/services/trireduce/trireduce_statistics