- New York Stock Exchange (NYSE)
- National Securities Clearing Corp. (NSCC)/Depository Trust Co.(DTC)
- American Stock Exchange (AMEX)
- National Association of Securities Dealers (NASD)
- Boston Stock Exchange (BSE)
- Philadelphia Stock Exchange (PHLX)
- Midwest Stock Exchange (MSE)
- Cincinnati Stock Exchange (CSE)
- Pacific Stock Exchange (PSE)
- Total: 7 exchanges and the NASD
Futures markets:
- Chicago Board of Trade (CBOT)
- Chicago Mercantile Exchange (CME)
- New York Mercantile Exchange (NYMEX)
- Commodity Exchange Inc. (COMEX)
- Coffee, Sugar & Coma Exchange (CSCE)
- New York Cotton Exchange (NYCE)
- New York Futures Exchange (NYFE)
- MidAmerica Commodity Exchange (MidAm)
- Kansas City Board of Trade (KCBOT)
- Minneapolis Grain Exchange (MGE)
- Chicago Rice & Cotton Exchange (CRCE)
- Amex Commodities Corp. (AMEXCC)
- Philadelphia Board of Trade (PHBOT)
Exchanges Options markets:
- Chicago Board Options Exchange (CBOE)
- American Stock Exchange (AMEX)
- Philadelphia Stock Exchange (PHLX)
- New York Stock Exchange (NYSE)
- Pacific Stock Exchange (PSE)
- National Association of Securities Dealers (NASD)
Exchanges& the NASD
- NSCC/D TC
- NSCC/DTC, Midwest Clearing Corp./Midwest Securities Trust
- Co., Stock Clearing Corp. of Philadelphia
- NSCC/DTC
- Stock Clearing Corp. of Philadelphia (SCCP)
- Philadelphia Depository Trust (Philadep)
- Midwest Clearing Corp. (MCC)/Midwest Securities Trust Co.
- (MSTC)
- NSCC/DTC or MCC/MSTC
- NSCC/DTC
Clearinghouses Clearinghouse:
- Board of Trade Clearing Corp. (BOTCC)
- CME Clearing House Divisionc
- NYMEX Clearing House Division
- COMEX Clearing Association (CCA)
- CSC Clearing Corp. (CSCCC)
- Commodity Clearing Corp. (CCC)
- Interrnarket Clearing Corp. (ICC)
- BOTCC
- KCBOT Clearing Corp. (KCBOTCC)
- MGE Clearing House Division BOTCC
- Options Clearing Corp. (OCC)