2021. Leadership The positions of Chairman and Chief Executive of the London Stock Exchange Group were founded in 2007, upon the establishment of the Group. This is not to be confused with the Chairmen and Chief Executive's of the London Stock Exchange plc, which is a subsidiary of the Group. The current Chief Executive is former Goldman Sachs banker David Schwimmer, who was appointed in 2018, replacing Xavier Rolet, who was ousted in November 2017. Schwimmer's most recent role at Goldman Sachs was serving as "global head of market structure and global head of metals and mining in investment banking". Senior leadership Chairman: Don Robert (since January 2019) Chief Executive: David Schwimmer (since April 2018) List of former chairmen Chris Gibson-Smith (2007–2015) Sir Donald Brydon (2015–2018) List of former chief executives Dame Clara Furse (2007–2009) Xavier Rolet (2009–2017) Principal subsidiaries Principal subsidiaries areas follows: Operations Following the merger with Borsa Italiana, the group is Europe's leading equities business, with 48% of the FTSEurofirst 100 by market capitalisation and with the most liquid order book by value and volume traded. Its activities include: London Stock Exchange: The London Stock Exchange is Europe's leading stock exchange and is owned by the London Stock Exchange Group plc. LSEG Technology: LSEG Technology was acquired by LSEG in 2009 as their technology service provider. The company was originally known as MillenniumIT and was subsequently rebranded as LSEG Technology. It offers a trading platform known as Millennium Exchange and is available for use at most of the leading stock markets in the world. Cassa di Compensazione e Garanzia ('CC&G'): CC&G provides central counterparty services. It was purchased along with Borsa Italiana in 2007. Monte Titoli: Monte Titoli is the Italian Central Securities Depository for Italian issued financial instruments. It performs pre-settlement, settlement and custody services for its member participants. It was created in 1978 and acquired by the Borsa Italiana in 2002 before becoming part of the LSEG. Turquoise: on 21 December 2009, the LSE agreed to take a 60% stake in rival trading platform Turquoise, which currently has a 7% share of the market. Turquoise will be merged with the LSE's trading facility Baikal Global. LCH: on 3 April 2012, LSE and LCH shareholders voted overwhelmingly to take up to 60 percent of the clearing operator with an offer of 20 euros per share, which valued LCH at 813 million euros ($1.1 billion). FTSE Russell: