[ESMA74-362-893 SFTR Q&A 4] 

a) Trading venue is defined under Article 4(24) of MiFID II as a regulated market, an MTF or an OTF. Counterparties therefore should report in the field 2.8 “Trading venue” the segment MIC of the trading venue for SFTs concluded on regulated markets, MTFs and OTFs, XOFF for SFTs concluded off-venue for SFTs that are admitted to trading on a venue and XXXX in the rest of the cases, including an execution through a systematic internaliser (SI).

b) No. SFTs concluded bilaterally (i.e. not on a trading venue, where trading venue should be understood as defined under MiFID) and cleared by a CCP should be reported pursuant to Article 2(1) of CDR (EU) 2019/356.