CHRW c.h. robinson worldwide, inc. NASDAQ Oil Refining/Marketing CYRX cryoport, inc. AMEX Oil Refining/Marketing EXPD expeditors international of washington, inc. NASDAQ Oil Refining/Marketing FWRD forward air corporation NASDAQ Oil Refining/Marketing HUBG hub group, inc. - class a NASDAQ Oil Refining/Marketing RLGT radiant logistics, inc. AMEX Oil Refining/Marketing RRTS roadrunner trans sys inc NYSE Oil Refining/Marketing CNI canadian national railway company NYSE Railroads CP canadian pacific kansas city limited common shares NYSE Railroads CSX csx corporation NYSE Railroads NSC norfolk southern corporation NYSE Railroads UNP union pacific corporation NYSE Railroads USDP usd partners lp NYSE Railroads ARCB arcbest corporation NASDAQ Trucking Freight/Courier Services HTLD heartland express, inc. NASDAQ Trucking Freight/Courier Services JBHT j.b. hunt transport services, inc. NASDAQ Trucking Freight/Courier Services KNX knight-swift transportation holdings inc. NYSE Trucking Freight/Courier Services LSTR landstar system, inc. NASDAQ Trucking Freight/Courier Services MRTN marten transport, ltd. NASDAQ Trucking Freight/Courier Services ODFL old dominion freight line, inc. NASDAQ Trucking Freight/Courier Services PTSI p.a.m. transportation services, inc. NASDAQ Trucking Freight/Courier Services SAIA saia, inc. NASDAQ Trucking Freight/Courier Services SNDR schneider national, inc. NYSE Trucking Freight/Courier Services ULH universal logistics holdings, inc. NASDAQ Trucking Freight/Courier Services UPS united parcel service, inc. NYSE Trucking Freight/Courier Services WERN werner enterprises, inc. NASDAQ Trucking Freight/Courier Services ZTO zto express (cayman) inc. american depositary shares, each representing one class a ordinary share. NYSE Trucking Freight/Courier Services