This is what ITG says about itself, very interesting accumulator...

ITG is an independent execution and research broker partnering with global portfolio managers and traders throughout the investment process, from investment decision through to settlement. With our launch of the POSIT® crossing network in 1987, we founded ITG with a strong commitment to empower buyside investors. And over the years, we've continued to deepen that commitment by creating a powerful network of intellectual capital, true industry experience, and market-leading technology to offer the unmatched insights that help clients generate and preserve alpha.

With 16 offices in 10 countries and multi-asset capabilities that support the needs of large equity portfolios, we combine the power of global reach with the precision of local vision. Bringing together market-leading tools and unmatched expertise, we have helped clients understand market trends, improve performance, mitigate risk, and navigate increasingly complex markets.