London, New York, 19 March 2026 – OSTTRA, the global post-trade solutions provider, has announced four key appointments to its leadership and product teams to support its strategy of post-trade transformation. Nathan Ondyak joins as Chief Commercial Officer, Peter Altero as Chief Business Development Officer, Chris Licini as Buy-Side Strategic Relationship Manager, and Christian Kjaeldgaard as Product Design Director.

These hires are an important strategic step following the acquisition of OSTTRA by private equity firm KKR in October last year and build on the further investment from a consortium of global banks announced in February 2026, reinforcing OSTTRA’s commitment under new ownership to investing for growth and delivering client-aligned innovation.

All four new hires join from London Stock Exchange Group plc (“LSEG”, Lon: LSEG), where they were key members of the LSEG Post Trade team, playing leading roles in the development of TradeAgent, SwapAgent, SwapClear and LSEG’s broader post-trade services offering. Nathan, Peter and Christian all return to the OSTTRA team, having held various roles at Markit, a founding OSTTRA business, earlier in their careers. They will work closely with OSTTRA partners and clients to accelerate innovation and the build-out of new services that bring new capital and operational efficiencies to complex workflows, extending OSTTRA services across asset classes.

Nathan Ondyak, Chief Commercial Officer, spent over 14 years at LSEG, where he led the expansion of LSEG’s post-trade capabilities and most recently served as the CEO of LSEG Post Trade Services (TradeAgent) and SwapAgent. Prior to LSEG, Nathan held senior product and sales management positions at Markit.

Peter Altero, Chief Business Development Officer, returns to OSTTRA from LSEG, where he spent three years as North America Head of TradeAgent, SwapAgent and Quantile, responsible for advancing LCH’s post-trade operations outside of its core clearing business.

Chris Licini, Buy-Side Strategic Relationship Manager, played a leading role in developing strategic customer relationships at LSEG for more than 14 years, with a particular focus on the buy-side community.

Christian Kjaeldgaard, Product Design Director, developed post-trade strategy and solutions across the SwapAgent offering at LSEG, having previously played an important role in the evolution of MarkitWire in the product management team at Markit.

Guy Rowcliffe and John Stewart, co-CEOs of OSTTRA: “Nathan, Peter, Chris, and Christian bring deep expertise and proven track records of innovation and collaboration across our industry. This perfectly complements the in-house expertise we already have at OSTTRA. Their appointments will significantly accelerate our ambition to transform post-trade this year and beyond, turning shared infrastructure into shared benefit.”

Nathan Ondyak, Chief Commercial Officer, OSTTRA: “I am excited to be joining OSTTRA at this pivotal moment and look forward to contributing significantly to writing the next chapter in the evolution of the post-trade landscape. OSTTRA is uniquely positioned at the forefront of modernising this critical industry sector. Our strategy focuses on working with the industry to connect and evolve our robust, trusted infrastructure with the new workflows and technologies that will define tomorrow’s financial markets.”