Souter Investments
Edinburgh family investment office founded by Sir Brian Souter in 2008; makes private equity investments of £2m-£30m in unquoted companies with its own capital.
USEFUL FOR Business owners seeking a long-term partner · Co-investors
Family & background
- HEADQUARTERS
- Edinburgh, United Kingdom
- FOUNDED
- 2008
- AUM
- £400M (2026)
- OUTSIDE CAPITAL
- No — own capital only
Investment approach
- STAGES
- GrowthBuyout
- ROUTES
- Companies (own capital)
- STRATEGIES
- Private equityDirect investments
- TICKET
- £2M–£30M
Overview
Souter Investments is a family investment office in Edinburgh founded in 2008 by Sir Brian Souter, co-founder of Stagecoach. It invests its own capital in unquoted companies, taking majority or minority stakes, leading deals or co-investing alongside private equity sponsors, with typical equity cheques of £2m-£30m. It reports more than £750m invested in over 100 companies since 2008 and upwards of £400m in its current portfolio. The Souter Charitable Trust is a major beneficiary of its work.
Investment thesis
Sector-agnostic, opportunistic private equity investing in unquoted companies with its own capital, unconstrained by fund rules; typical hold of 4-6 years; excludes alcohol, tobacco, armaments, gambling and predatory short-term lending.
Holdings & investments (38)
- Mi HubConsumer & E-commerce · since 2026
- ActeonClimate & Energy
- AGITO MedicalHealthTech
- AkixiSoftware & SaaS
- Amber RiverFintech
- AmeyIndustrial & Manufacturing
- Ancora GroupIndustrial & Manufacturing
- ArdentIndustrial & Manufacturing
- Cardo GroupIndustrial & Manufacturing
- CellPoint DigitalFintech
- Climate Impact Partners
- CollingwoodFintech
- Crest ExperiencesConsumer & E-commerce
- ERA Group
- ForLife GroupHealthTech
- Fullers360Mobility & Logistics
- Intralink
- LikezeroFintech
- McAvoyIndustrial & Manufacturing
- Newcastle Tool and GaugeIndustrial & Manufacturing
- NucoreIndustrial & Manufacturing
- PayenFintech
- PelionSoftware & SaaS
- Premier HytempIndustrial & Manufacturing
- Premier ModularIndustrial & Manufacturing
- Refined BrandsConsumer & E-commerce
- SI-UK
- Suir EngineeringIndustrial & Manufacturing
- Sumer
- TalkTalk
- TracercoClimate & Energy
- TWMAClimate & Energy
- UKATHealthTech
- VPSIndustrial & Manufacturing
- WINN
- ZelusConsumer & E-commerce
- Zenix AerospaceIndustrial & Manufacturing
- Kids PlanetEducation · Exited
People
- Scott MackenzieInvestment Director · source
- Maurice ShamashInvestment Director · source
- Stuart DunlopInvestment Manager · source
- Chris McFaddenInvestment Associate · source
- Holly WilkieInvestment Analyst · source
- Sir Brian SouterCo-founder · source
- Andy MacfieChairman · source
- John BerthinussenManaging Director · source
- Calum CusiterManaging Director · source
- Allan ClarkHead of Finance · source
Frequently asked questions
Souter Investments is a single family office based in Edinburgh, the United Kingdom, founded in 2008.
Souter Investments invests its own capital into companies. Its stated asset mix includes private equity and direct investments.
Souter Investments invests at Growth and Buyout stages in Industrial & Manufacturing, HealthTech, Climate & Energy, Fintech and Software & SaaS.
Souter Investments's stated ticket size is £2M–£30M.
Key people at Souter Investments include Sir Brian Souter (Co-founder), Andy Macfie (Chairman), John Berthinussen (Managing Director) and Calum Cusiter (Managing Director).
Souter Investments's holdings and investments include Acteon, AGITO Medical, Akixi, Amber River, Amey, Ancora Group, Ardent and Cardo Group, among others.
The most recent publicly reported investment by Souter Investments is Mi Hub (Buyout (with Sullivan Street Partners)), announced in Sep 2026.
No. Souter Investments invests its own capital and does not raise money from outside investors.