Henry Ellenbogen - Man Versus Machine - Invest Like the Best with Patrick O'Shaughnessy Recap

Podcast: Invest Like the Best with Patrick O'Shaughnessy

Published: 2025-12-16

Duration: 1 hr 48 min

Summary

In this episode, Patrick O'Shaughnessy speaks with Henry Ellenbogen, who emphasizes that successful investing hinges on understanding people and the transformative changes within companies rather than merely relying on algorithms or market trends.

What Happened

Patrick O'Shaughnessy introduces Henry Ellenbogen, the founder and managing partner of Durable Capital Partners, highlighting his impressive background at T. Rowe Price where he led the New Horizons fund to remarkable success. Ellenbogen's investment philosophy is rooted in the belief that great investing is about understanding the nuances of people and the changes they drive within businesses. This perspective stems from his earlier background in organic chemistry and politics, where he learned to appreciate balance and sustainability, principles he now applies to investing.

A significant aspect of Ellenbogen's approach is his focus on 'Act II teams'—founders who leverage lessons from previous ventures to achieve success in new ones. He reflects on how his experiences at T. Rowe Price, especially reading through decades of shareholder letters, informed his investment strategy. Ellenbogen’s passion for investing is palpable, and he believes that a deep understanding of company culture and leadership is crucial for identifying winners in the market.

Key Insights

Key Questions Answered

What is Henry Ellenbogen's investment philosophy?

Henry Ellenbogen's investment philosophy is grounded in the belief that great investing is fundamentally about understanding people and the changes they can effect within their companies. This perspective has been shaped by his unique background; he did not follow a traditional finance path but instead came from a background in organic chemistry and politics. Ellenbogen draws parallels between investing and principles from biology, emphasizing the need for balance and sustainability in both ecosystems and investment strategies.

How did Ellenbogen's experience at T. Rowe Price influence his career?

Ellenbogen's tenure at T. Rowe Price was pivotal in shaping his investment strategy. He was fortunate to be mentored by Jack Laporte, who advocated for investing in small companies that prioritize culture and employee satisfaction. This mentorship influenced Ellenbogen's approach to identifying successful companies, as he learned that those which focus on improving themselves and their environments tend to thrive. His experience managing the New Horizons fund also led him to deeply analyze shareholder letters, allowing him to uncover the historical factors contributing to the fund's long-term success.

What does Ellenbogen mean by 'Act II teams'?

The term 'Act II teams' refers to founders or executives who have learned valuable lessons from their initial ventures and apply those insights to new challenges. Ellenbogen emphasizes the importance of this concept in investing, as these individuals often have a unique perspective that can lead to transformative successes in their subsequent businesses. By focusing on such teams, Ellenbogen believes that investors can identify companies that are not just surviving but are poised for significant growth and innovation.

How does Ellenbogen view the role of culture in investing?

Ellenbogen views company culture as a critical component of successful investing. He asserts that firms with strong, positive cultures are more likely to allocate capital effectively and sustain long-term growth. His experience has taught him that companies run by leaders who prioritize their employees' well-being and foster a good working environment tend to perform better in the market. This cultural understanding, combined with a deep engagement with company leadership, allows Ellenbogen to differentiate between companies that are merely existing and those that are genuinely transforming.

What lessons did Ellenbogen learn from studying shareholder letters?

By studying shareholder letters from the New Horizons fund, Ellenbogen gained insights into the historical strategies that drove the fund's success over its 50-year history. This retrospective analysis helped him understand the key drivers of performance, such as the importance of capital allocation and the impact of company culture on growth. These lessons have become foundational to his investment philosophy, reinforcing the idea that successful investing is not solely about numbers but also about the stories, cultures, and people behind the companies.