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Who We Are

Our Vision

To accelerate the industrial world’s transition to the next era of innovation

Why Valstone

Enduring growth for the industries that matter most
At Valstone, we specialize in scaling technology companies that power essential sectors of the economy. With a long-term mindset and a differentiated playbook, we help businesses scale sustainably while preserving what makes them great.
What sets us apart
Industrial Focus
We partner exclusively with industrial software and technology companies powering essential sectors of the economy.
Long-Term Approach
We invest with a “buy-and-grow forever” mindset—no fixed timelines, just a commitment to lasting value.
Operational Autonomy
Our companies operate with autonomy. We empower leadership with tools to succeed – no red tape, no micromanagement.
Proven M&A Engine
A dedicated in-house team drives smart, strategic acquisitions to accelerate growth.
Global Expertise
We help businesses expand into new markets with confidence and support.
Go-to-Market Acceleration
Our marketing team sharpens positioning, boosts sales, and drives growth.
Peer Network
A trusted community of operators and executives fosters knowledge-sharing and innovation.
Advisory Board Support
Experienced advisors that offer strategic guidance and mentorship.

our leadership

Ouissam Youssef

Sam Youssef

Chairman & Co-Founder
Steph Manos

Steph Manos

President & Co-Founder
Gilbert Rahme

Gilbert Rahme

COO
Daniel Maalouf

Daniel Malouf

Head of M&A and Group CEO, Supply Chain & Logistics
Antonio Armormino

Antonio Amormino

Investment Director
Ariane Dusablon

Ariane Dusablon

Operations Director
Thomas Boucher-Charest

Thomas Boucher-Charest

Group CEO, Manufacturing & Fabrication
Nicolas Jean

Nicolas Jean

VP of Finance
Christina Cyrenne

Christina Cyrenne

Head of People
David Felissimo

David Felicissimo

General Counsel
Bennet Fahey

Bennett Fahey

Operations Associate
Ralph Aziz

Ralph Aziz

Operations Director
Nate (Nader) Sabb

Nate Sabb

Co-Group CEO, Construction & Diversified Materials
Sebastian Alvarez

Sebastian Alvarez

Co-Group CEO, Construction & Diversified Materials
Tyson Hasegawa-Foster

Tyson Hasegawa-Foster

Investment Associate
Lindsay Chim

Lindsay Chim

Managing Director
Josh Clinton, Managing Director

Josh Chilton

Managing Director
Christa Bemis, Managing Director

Christa Bemis

Managing Director
Marcus Butterfield, Managing Director

Marcus Butterfield

Managing Director
Mike Zielski - Managing Director

Mike Zielski

Managing Director
James Foust

James Foust

Managing Director
Carrie Witor - Managing Director

Carrie Witor

Managing Director
Dan Schley

Dan Schley

Managing Director
Jon Poole, Managing Director

Jon Poole

Managing Director
Mark Robin

Mark Robin

Investment Associate
Julian

Julian Diodati

Investment Analyst

Our Locations