The Knox Family Office
Sandend House
Built through enterprise. Held for generations.
Founded by Calum Knox, Sandend House is a first-generation family office created to build, own and steward businesses, intellectual property and long-term assets.
Built through enterprise rather than inherited from it, the House takes a patient approach to ownership, reinvestment and responsibility.
Our Purpose
A permanent home for what we build.
Sandend House brings the ownership and stewardship of the Knox family's commercial interests into one long-term structure.
It is not a multi-family office and does not manage external client money. Its purpose is to develop the businesses and assets it owns, protect the intellectual property created within the group and reinvest with a horizon measured in decades.
About Sandend HouseBuild
We create and develop operating businesses around substantive problems and practical opportunities.
Own
We retain meaningful ownership and control where long-term alignment and strategic capability matter.
Steward
We protect and develop companies, intellectual property, property and other assets with care and responsibility.
Compound
We reinvest capital, knowledge and capability with a generational rather than short-term horizon.
Founder and Principal
Calum Knox
Calum Knox is a Scottish entrepreneur and the founder and CEO of The RLK Group.
His work spans artificial intelligence, autonomous systems, defence software, property technology and long-term asset ownership. He remains directly involved in group strategy, capital allocation, product direction, commercial partnerships and the creation of new ventures.
Sandend House provides the permanent ownership and stewardship structure around those interests.
Read Calum's Story
Selected Interests
Built, owned and operated with purpose.
The Sandend House portfolio is focused on businesses and assets where technical capability, operational experience and retained ownership can create durable value.
Advanced Technology
The RLK Group
Founded by Calum Knox
A UK technology group developing artificial intelligence, autonomous systems, defence software, simulation and operational analytics.
Including RLK Technologies and RLK Defence
Visit The RLK GroupProperty Technology
Letwise
Founded by Calum Knox
A property technology and lettings platform designed to reduce management friction, improve transparency and automate routine property-management processes.
Visit LetwiseIntellectual Property
Protected by design.
Intellectual property is treated as a core asset rather than an afterthought. Across The RLK Group, the current portfolio includes filed patent applications, registered trademarks and a registered design protecting technologies in artificial intelligence, autonomy and operational systems.
Filed patent applications
Registered trademarks
Registered design
Beyond Enterprise
Ownership carries responsibility.
Sandend House takes a long-term view of responsibility as well as ownership.
Its stewardship interests include animal welfare, responsible land use, education and practical community impact.
The Grazing Trust
A Scottish not-for-profit initiative focused on animal welfare, secure grazing and responsible land stewardship.
A note from the founder
I did not establish Sandend House to make inherited wealth look more organised. I established it to build, protect and compound value through enterprise.
Our starting point is not passive wealth management. It is the creation of useful businesses, defensible intellectual property and productive assets.
I believe ownership brings responsibility. Control should be retained where it matters, capital should be deployed patiently, and every business or asset should have a clear strategic purpose.
The objective is not to appear established. It is to become enduring.
Calum Knox
Founder and Principal
Start a relevant conversation.
Sandend House welcomes relevant corporate, strategic, property, intellectual-property, media and stewardship enquiries.
Contact Sandend House