For the purposes of this Regulation, the following definitions apply:
(1) "portfolio trade" means transactions in five or more different financial instruments where those transactions are traded at the same time by the same client and as a single lot against a specific reference price;
(2) [deleted]
(3) [deleted]
(4) "systematic internaliser" means an investment firm as defined in Article 4(1)(20) of Directive 2014/65/EU of the European Parliament and of the Council [Directive 2014/65/EU of the European Parliament and of the Council of 15 May 2014 on markets in financial instruments and amending Directive 2002/92/EC and Directive 2011/61/EU (OJ L 173, 12.6.2014, p. 349).].