MML is currently investing its fifth fund. Below are profiles of the investments currently in MML’s portfolio. A selection of MML's realised investments are profiled here.
| Company | Investment Date | Business description | Location | |
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Arena Group | February 2012 | International events services | UK |
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MineTech International | Dec 2010 | International mine survey and clearance | UK |
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Precision Valve | Aug 2010 | Provider of aerosol valves and dispensing systems for consumer and industrial applications | US |
| Vanguard Healthcare Solutions | Mar 2009 | Mobile surgical operating theatres and diagnostic capacity | UK | |
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PaR Systems Inc | Jul 2008 | Develops and manufactures automation and material handling equipment for the defence, aerospace, environmental and food & beverage industries | US |
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EIC Group Holdings | Jun 2008 | Building services and engineered facilities management | UK |
| Argyle Security Inc | Apr 2008 | Security solutions for correctional and commercial customers | Texas, US | |
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Carre Blanc | Oct 2007 | Design and distribution of household linen | France |
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The Regard Partnership | Apr 2007 | Residential care and supported living services for adults and children with permanent learning disabilities | UK |
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Clyde Bergemann | Mar 2001 | Equipment manufacturer and service provider to the global energy industry | UK |
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Industrial Accoutics Company | Mar 1998 | Develops, manufactures and installs a line of products which suppress noise and condition the acoustical environment of enclosed spaces | US |