Insights / Archive

Notes on ownership, operating, and the businesses we run.

We write occasionally — to record a position, to mark a change at one of our companies, or to share how we think about the work of owning and operating businesses for the long term.

2026.05.18

Long-term ownership vs. short-term exit

Most ownership models in private markets are organized around a sale. We are organized around continuing to own. A short note on what that changes in practice.

Perspective
2026.04.02

Why we chose a holding company structure

A holding company is a deliberately plain answer to a common question: how should related operating businesses be owned over time. Here is why the structure fits the work.

Perspective
2026.02.14

Building businesses for the long term

Durable businesses are the cumulative result of decisions made one quarter at a time. A few of the standards we hold ourselves to inside each company.

Perspective
2025.11.09

The evolution of Propel

From a regional voice operator to a multi-market communications infrastructure business — a brief history of what is now Propel.

Company
2025.08.21

The evolution of Rook

Rook began as a small advisory engagement and grew into a practice serving founders, executives, and boards through their most consequential decisions.

Company
2026.06.01

Rook Advisors becomes Rook

The advisory practice formerly known as Rook Advisors is now Rook. The mandate is unchanged.

Announcement
2026.06.01

Castle Tel becomes Propel

Our communications business is rebranding as Propel. New identity, same network, same people.

Announcement
2026.06.01

The formation of Rampant

Rampant LLC is the parent holding company for the operating businesses formerly held under the Rook Group umbrella.

Announcement
[ 08 entries · archive continues ]
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Notes from the office, occasionally.

A short dispatch when we publish a perspective or mark a change at one of our companies. No more often than monthly.

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