Biography

Seth Timen is a Portfolio Manager and Co-Head of the Disciplined Alpha Team at Loomis, Sayles & Company. He was named Co-Head of the team in 2020. Seth began his investment industry career in 2001 and joined Loomis Sayles in 2010 from Pequot Capital Management, where he was responsible for trading fixed income risk across investment grade, high yield, and structured products. Previously, he was an associate at Credit Suisse, where he assisted with corporate bond investment and strategy execution for institutional clients. Seth earned a BA from the University of Michigan.

Latest Insights by Seth Timen

Alpha Engine Perspectives
September 22, 2025 • 22 min read

The Role of Portfolio Impact (PI) in the Disciplined Alpha Strategy

We use Portfolio Impact (PI), a transparent and relatively straightforward risk measure, to help understand portfolio-level sector risk and issue-specific (idiosyncratic) risk.
Disciplined Alpha
Alpha Engine Perspectives
August 12, 2025 • 4 min read

Loomis Sayles Disciplined Alpha: Tech-Related Energy Demands Present Challenges and Opportunities for Utilities

The rapid expansion of artificial intelligence (AI), cloud computing and digital infrastructure is reshaping global electricity demand.
Disciplined Alpha