Investing in the Businesses Behind Critical Infrastructure.

Arthur Baker is a New York-based private investment holding company. We maintain ownership interests in four operating companies and play an active role in their strategic direction and long-term development.

Investment approach Contact

High-voltage transmission towers across open land at sunset

Built on principal capital.

Arthur Baker has grown primarily through principal capital and direct ownership, not by raising institutional capital. That history shapes how we work. We invest selectively, hold for the long term, and stay close to the strategic decisions of our companies.

Our four companies operate independently, each with its own leadership, customers, and growth plans. Their capabilities are complementary, spanning the development and financing of large-scale energy, data center, and infrastructure projects and the manufacture of power, structural, and façade systems. Each company runs its own commercial operations. Where a project calls for it, they can work together.

Robotic welding cell in an industrial manufacturing facility

How we invest.

Arthur Baker was built on principal capital, and we approach every investment as a long-term owner. Where an opportunity warrants it, we are open to selective institutional co-investment, strategic equity partnerships, and joint ventures with partners who share that long-term view.

Focus
We invest in businesses supporting the development and expansion of power, digital infrastructure, and industrial capacity, where operating knowledge matters as much as capital.
Principal capital
We invest our own capital. Our interests are aligned with every business we back, and our time horizon is not set by the life of a fund.
Disciplined capital allocation
We are selective. We commit capital where we understand the asset, the operating risk, and the path to long-term value. We pass on opportunities that do not meet that standard.
Active ownership
We take an active role in the strategic decisions of our companies, including capital structure, senior leadership, and major investments. Day-to-day operations stay with each company's own management.
Long-term value creation
We hold for the long term. We build businesses to last, and when they are ready for greater scale, we help put in place the financing structures that take them there.
Direct involvement
Our principals remain actively involved in strategic decisions and maintain direct relationships with key partners and counterparties.

Our companies.

Four independent operating companies, each with its own leadership, customers, and market. Arthur Baker maintains an ownership interest in each and takes an active part in its strategic direction and long-term development.

Aerial view of a data center campus beside a high-voltage electrical substation

Heathcote Capital

Energy, data center, and infrastructure investment

Heathcote Capital develops, structures, finances, and invests in large-scale energy, data center, and infrastructure projects in the United States and Europe.

Strategic focusDevelopment and capital structuring of large-scale projects.

Visit heathcote-capital.com

Nordeston

Power infrastructure and energy storage

Nordeston manufactures electrical infrastructure equipment for utilities, data centers, and energy projects, including energy storage, transformers, and integrated power systems.

Strategic focusPower systems for utility, data center, and energy projects.

Visit nordeston.com

Aerial view of a multi-story building under construction with a steel roof structure

SteelTech USA

Industrialized steel building systems

SteelTech USA designs and manufactures modular, prefabricated, and rapid-deployment steel building systems.

Strategic focusIndustrialized construction with factory-built steel structures.

Visit steeltechusa.com

Installation of glass façade panels on a commercial building

Karsman Architectural

Prefabricated façade systems

Karsman Architectural develops and manufactures prefabricated and modular façade systems for large-scale commercial and industrial projects.

Strategic focusEngineered façade systems for large commercial and industrial buildings.

Visit karsmanarchitectural.com

For products, projects, and commercial inquiries, please contact each company directly.

Leadership.

Arthur Baker is led by its Managing Partner together with the co-founders of its operating companies.

Jacob Seymen
Co-Founder & Managing Partner
Arthur Baker
Jacob Seymen leads Arthur Baker's investment activity and its strategic work with the group's companies. He founded and led a broadband infrastructure company that was sold to a GSM operator in 2013 and served on the board of a Bloomberg Tier 1 solar manufacturer. He has two decades of operating, transactional, and strategic experience in energy and infrastructure.
Mark Gollin
Co-Founder & Managing Partner
Heathcote Capital
Mark Gollin leads investment strategy and capital formation at Heathcote Capital, drawing on more than 25 years in real estate, credit, and special situations. His career includes Bear Stearns, Lehman Brothers, Apollo Global Management, and Bayview Asset Management, where he built a €3.5+ billion European distressed real estate platform. Most recently, as Global Head of Platforms at Arrow Global Management, he oversaw more than 20 operating businesses.
Hakki Kara
Co-Founder & Managing Partner
Nordeston
Hakki Kara leads Nordeston and has extensive experience in large-scale energy storage and power generation across Europe, Central Asia, and the Middle East. He has overseen the deployment, integration, and commissioning of utility-scale battery storage, supercapacitor, and transformer systems for grid-connected and behind-the-meter applications.
Edward Tekin
Co-Founder & Managing Partner
SteelTech USA
Edward Tekin leads SteelTech USA and oversees the design, manufacture, and delivery of its steel building systems. His career spans engineering, fabrication, and large-scale project delivery in hospitality, student housing, multifamily, industrial, commercial, and data center construction.