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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
Daniel Maalouf

Daniel Malouf

Principal
Antonio Armormino

Antonio Armormino

Investment Director
Gilbert Rahme

Gilbert Rahme

SVP, Operations
Thomas Boucher-Charest

Thomas Boucher-Charest

Operations Director
Nicolas Jean

Nicolas Jean

VP of Finance
Christina Cyrenne

Christina Cyrenne

People Operations Manager
David Felissimo

David Felissimo

General Counsel
Ralph Aziz

Ralph Aziz

Operations Director
Nate (Nader) Sabb

Nate Sabb

Operations Associate
Bennet Fahey

Bennet Fahey

Data Intelligence Associate
Sebastian Alvarez

Sebastian Alvarez

Investment Associate
Josh Clinton, Managing Director

Josh Chilton

Managing Director
Christa Bemis, Managing Director

Christa Bemis

Managing Director
Marcus Butterfield, Managing Director

Marcus Butterfield

Managing Director
Jon Poole, Managing Director

Jon Poole

Managing Director
Mike Zielski - Managing Director

Mike Zielski

Managing Director
Carrie Witor - Managing Director

Carrie Witor

Managing Director
James Foust

James Foust

Managing Director
Lindsay Chim

Lindsay Chim

Managing Director
Dan Schley

Dan Schley

Managing Director
Mark Robin

Mark Robin

Investment Associate
Julian

Julian Diodati

Investment Analyst

Our Locations