Martlet will almost always co-invest with angels and small seed funds, and has the capacity to follow in subsequent investment rounds.

Potential investees must demonstrate their potential for rapid growth and will usually possess a strong defensible position with respect to their technology, intellectual property and products.

We focus on companies that have completed the proof of concept stage, and usually will have achieved some sales/grant revenues. In all cases, there must be a strong and demonstrable commercial demand for the technology under development.

Peter Cowley is the main point of contact, and a group of senior Marshall executives will assist in choosing appropriate investments.

Peter Cowley is a seasoned Cambridge-based mentor and angel investor.  Peter has a Cambridge University degree in Engineering and Computing Science, lived in Bavaria for five years and owns technology and construction businesses.  Peter has personally been investing in high growth start-ups for many years and is a board member of the Cambridge Angels.  He has run the Computing Laboratory Ring mentoring scheme for 8 years and is chair of the ideaSpace supporters.  He has been treasurer and chair of several charities in the advice, healthcare and education sectors.  There is more at and at

Email or call us today: 01223 373757

Marshall Group

Founded in 1909 as an automobile company in Cambridge, Marshall entered the aviation business in 1929. The Marshall Group, still a privately owned company, is chaired by Alex Dorrian CBE since Sir Michael Marshall moved to the role of President in October 2016. Robert Marshall, the fourth generation of the Marshall family, became Group Chief Executive in 2012.

Marshall Group directory information