Investors Exchange (IEX)
Nasdaq BX (Boston)
Nasdaq PSX (Philadelphia)
List of Internalizers:
Alternative Trading Systems
UBSA — UBS ATS — UBS SECURITIES LLC
CROS — CROSSFINDER — CREDIT SUISSE SECURITIES (USA) LLC
SGMT — SIGMA X2 — GOLDMAN, SACHS & CO.
EBXL — LEVEL ATS — EBX LLC
MSPL — MS POOL (ATS-4) — MORGAN STANLEY & CO. LLC
JPMX — JPM-X — J.P. MORGAN SECURITIES LLC
BIDS — BIDS ATS — BIDS TRADING L.P.
LATS — THE BARCLAYS ATS — BARCLAYS CAPITAL INC.
DLTA — DEALERWEB — Dealerweb Inc.
ITGP — POSIT — VIRTU AMERICAS LLC (acquired Nov. 2018)
MSTX — MS TRAJECTORY CROSS (ATS-1) — MORGAN STANLEY & CO. LLC
JPBX — JPB-X — J.P. MORGAN SECURITIES LLC
DBAX — SUPERX ATS — DEUTSCHE BANK SECURITIES INC.
KCGM — VIRTU MATCHIT ATS — VIRTU AMERICAS LLC
MSRP — MS RPOOL (ATS-6) — MORGAN STANLEY & CO. LLC
MLIX — INSTINCT X — BOFA SECURITIES, INC.
IATS — IBKR ATS — INTERACTIVE BROKERS LLC
XSTM — CROSSSTREAM — NATIONAL FINANCIAL SERVICES LLC
LQNA — LIQUIDNET H2O ATS — LIQUIDNET, INC.
BLKX — INSTINET BLOCKCROSS — NOMURA
INCR — INTELLIGENTCROSS ATS — INTELLIGENT CROSS LLC
LQNT — LIQUIDNET NEGOTIATION ATS — LIQUIDNET, INC.
ICBX — CBX — INSTINET, LLC (now Nomura?)
LMNX — LUMINEX ATS — LUMINEX TRADING & ANALYTICS LLC
CODA — CODA — CODA MARKETS, INC.
CBLC — CITIBLOC — CITIGROUP GLOBAL MARKETS INC.
XIST — INSTINET CROSSING — INSTINET, LLC (now Nomura?)
PROS — TZERO ATS, LLC — TZERO ATS, LLC (formerly PRO Securities (PRO Securities LLC))
AQUA — AQUA — AQUA SECURITIES L.P.
PJCX — XE — PIPER JAFFRAY & CO (Formerly XE – WEEDEN & CO.L.P. WDNX)
USTK — USTOCKTRADE SECURITIES, INC. — USTOCKTRADE SECURITIES, INC.
….
APOG — APOGEE — CITADEL SECURITIES LLC — Ceased on April 2, 2015
CSTN — AMERICAN LEDGER ATS — AMERICAN LEDGER ATS