U.S. Options

Please be advised that the Primary Lead Market Maker (PLMM) role in the option classes listed below will be re-assigned to the following firms effective for trading Tuesday, May 31, 2016.

• Aluminum Corporation Of China Limited (ACH) -Wolverine Trading, LLC
• Adcare Health Systems Inc (ADK) -Susquehanna Securities
• Alamos Gold Inc (AGI) -Morgan Stanley
• Allot Communications Ltd (ALLT) -Wolverine Trading, LLC
• Alaska Communications Systems Group, Inc. (ALSK) -Wolverine Trading, LLC
• Albany Molecular Research (AMRI) -Morgan Stanley
• Anthera Pharmaceuticals, Inc. (ANTH) -Morgan Stanley
• Apricus Biosciences Inc (APRI) -Citadel Securities, LLC
• Alpha Pro Tech Ltd. (APT) -Wolverine Trading, LLC
• AU Optronics Corp (AUO) -Wolverine Trading, LLC
• Avianca Holdings S.A.  (AVH) -Wolverine Trading, LLC
• Belmond Ltd. (BEL) -Barclays Capital Inc.
• Bbva Banco Francés Sa (BFR) -Susquehanna Securities
• BGC Partners Inc (BGCP) -Wolverine Trading, LLC
• Biotime, Inc. (BTX) -Citadel Securities, LLC
• Calix, Inc. (CALX) -Wolverine Trading, LLC
• Catalyst Biosciences, Inc. (CBIO) -Citadel Securities, LLC
• Cempra, Inc. (CEMP) -Morgan Stanley
• Global X China Financials ETF (CHIX) -Susquehanna Securities
• Cloud Peak Energy, Inc (CLD) -Morgan Stanley
• Clearsign Combustion Corporation (CLIR) -Wolverine Trading, LLC
• Conatus Pharmaceuticals Inc. (CNAT) -Citadel Securities, LLC
• Corcept Therapeutics Incorporated (CORT) -Morgan Stanley
• Control4 Corporation (CTRL) -Citadel Securities, LLC
• Neuralstem, Inc. (CUR) -Morgan Stanley
• Cablevision Systems Inc (Dist) (CVC) -Susquehanna Securities
• SPDR Barclays Convertible Secs ETF (CWB) -Wolverine Trading, LLC
• Delcath Systems, Inc. (DCTH) -Citadel Securities, LLC
• DHI Group, Inc. (DHX) -Citadel Securities, LLC
• Denison Mines Corp. (DNN) -Citadel Securities, LLC
• Durect Corporation (DRRX) -Citadel Securities, LLC
• ECA Marcellus Trust I (ECT) -Wolverine Trading, LLC
• EDAP Tms S.A. (EDAP) -Wolverine Trading, LLC
• Vaalco Energy Inc (EGY) -Susquehanna Securities
• Global Eagle Entertainment Inc. (ENT) -Susquehanna Securities
• EP Energy Corporation (EPE) -Citadel Securities, LLC
• Energy Recovery Inc. (ERII) -Wolverine Trading, LLC
• Enteromedics Inc (ETRM) -Susquehanna Securities
• First Trust Ise-Revere Natural Gas ETF (FCG) -Morgan Stanley
• First Horizon National Corporation (FHN) -Barclays Capital Inc.
• Fluidigm Corporation (FLDM) -Citadel Securities, LLC
• Flamel Technologies S.A., (FLML) -Morgan Stanley
• Foundation Medicine, Inc. (FMI) -Morgan Stanley
• First Niagara Financial Group, Inc. (FNFG) -Barclays Capital Inc.
• Fifth Street Finance Coporation (FSC) -Morgan Stanley
• Gran Tierra Energy Inc. (GTE) -Citadel Securities, LLC
• Gulf Resources Inc. (GURE) -Wolverine Trading, LLC
• Hugoton Royalty Trust (HGT) -Wolverine Trading, LLC
• Infrareit, Inc. (HIFR) -Susquehanna Securities
• Intelsat S.A. (I) -Wolverine Trading, LLC
• Intralinks Holdings, Inc. (IL) -Wolverine Trading, LLC
• ING Groep N.V. (ING) -Susquehanna Securities
• Intersections Inc (INTX) -Wolverine Trading, LLC
• InterOil Corporation (IOC) -Susquehanna Securities
• Investors Real Estate Trust (IRET) -Wolverine Trading, LLC
• Investment Technology Group (ITG) -Susquehanna Securities
• Kemet Corporation (KEM) -Susquehanna Securities
• Kratos Defense & Security Solutions, Inc. (KTOS) -Susquehanna Securities
• Layne Christensen Company (LAYN) -Wolverine Trading, LLC
• Legacy Reserves Lp (LGCY) -Wolverine Trading, LLC
• Medley Capital Corporation (MCC) -Wolverine Trading, LLC
• MFC Bancorp Ltd. (MFCB) -Citadel Securities, LLC
• Medallion Financial Corporation (MFIN) -Citadel Securities, LLC
• MRC Global Inc. (MRC) -Susquehanna Securities
• Mast Therapeutics, Inc. (MSTX) -Citadel Securities, LLC
• Navidea  Biopharmaceuticals Inc. (NAVB) -Morgan Stanley
• National Cinenedia Inc (NCMI) -Barclays Capital Inc.
• Nanoviricides, Inc. (NNVC) -Susquehanna Securities
• New York Reit, Inc. (NYRT) -Wolverine Trading, LLC
• Orasure Technologies Inc (OSUR) -Morgan Stanley
• Oxigene Inc (OXGN) -Susquehanna Securities
• Pacific Biosciences Of California Inc (PACB) -Citadel Securities, LLC
• Pacific Drilling SA (PACD) -Susquehanna Securities
• Peoples United Financial Bank, Inc. (PBCT) -Citadel Securities, LLC
• Permian Basin Royalty Trust (PBT) -Citadel Securities, LLC
• Pharmathene Inc (PIP) -Citadel Securities, LLC
• Primero Mining Corp. (PPP) -Susquehanna Securities
• Pernix Therapeutics Holdings, Inc. (PTX) -Morgan Stanley
• Petrobras Argentina S.A (PZE) -Susquehanna Securities
• Qiagen N V (QGEN) -Citadel Securities, LLC
• Qlogic Corporation (QLGC) -Wolverine Trading, LLC
• QLT Inc. (QLTI) -Susquehanna Securities
• Quantum Corp (QTM) -Wolverine Trading, LLC
• Rait Financial Trust (RAS) -Morgan Stanley
• Research Frontiers Inc. (REFR) -Susquehanna Securities
• iShares Mortgage Real Estate Capped ETF (REM) -Citadel Securities, LLC
• RPC Inc (RES) -Susquehanna Securities
• Rigel Pharmaceuticals, Inc. (RIGL) -Morgan Stanley
• Regional Management Corp. (RM) -Wolverine Trading, LLC
• Rosetta Stone Inc (RST) -Morgan Stanley
• Sabre Corporation (SABR) -Wolverine Trading, LLC
• Star Bulk Carriers Corporation (SBLK) -Citadel Securities, LLC
• Superconductor Technologies, Inc. (SCON) -Susquehanna Securities
• Select Medical Holdings Corporation (SEM) -Citadel Securities, LLC
• Global X Silver Miners ETF (SIL) -Citadel Securities, LLC
• Senior Housing Properties Trust (SNH) -Morgan Stanley
• Transglobe Energy Corp (TGA) -Citadel Securities, LLC
• Tandem Diabetes Care, Inc. (TNDM) -Susquehanna Securities
• Teekay Tankers Ltd (TNK) -Susquehanna Securities
• Tsakos Energy Navigation Ltd (TNP) -Barclays Capital Inc.
• Tanzanian Royalty Exploration (TRX) -Wolverine Trading, LLC
• Tim Participacoes Sa (TSU) -Susquehanna Securities
• Therapeuticsmd, Inc (TXMD) -Citadel Securities, LLC
• Powershares DB Us Dollar Index Bearish Fund (UDN) -Susquehanna Securities
• Uranium Energy Corp (UEC) -Citadel Securities, LLC
• USA Compression Partners, L.P. (USAC) -Citadel Securities, LLC
• Universal Insurance Holdings, Inc. (UVE) -Citadel Securities, LLC
• Meridian Bioscience Inc. (VIVO) -Susquehanna Securities
• VOC Energy Trust (VOC) -Wolverine Trading, LLC
• Vishay Intertechnology (VSH) -Susquehanna Securities
• Vivint Solar, Inc. (VSLR) -Susquehanna Securities
• iPath S&P 500 Vix Mt Futures Etn (VXZ) -Citadel Securities, LLC