
Odds on Open Ex- Citadel Analyst and Millennium PM: What It’s Like Inside Both Hedge Funds
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Nov 9, 2025 Doug Garber, a former analyst at Citadel and portfolio manager at Millennium Management, now leads Westport Alpha Group. In this chat, he reveals the contrasting cultures of Citadel's structured strategies versus Millennium's decentralized, entrepreneurial approach. Doug dives into the importance of deep research in portfolio construction, the challenges of transitioning from sell-side to buy-side, and the traits that make a successful analyst. He also shares personal insights on balancing high-pressure roles with family life and raising kind children.
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Domain Knowledge Drives Stock Picking
- Deep domain research is the foundation of a great fundamental investment process.
- Doug Garber says research makes you “90% of the way there” to a variant view before placing a bet.
Train On The Sell Side First
- Use sell-side research as training because it builds transferable domain expertise for the buy side.
- Doug Garber recommends leveraging sell-side quarters, management calls, and industry study to develop an edge.
Two Successful Multi-Manager Models
- Multi-manager firms differ: Millennium runs decentralized entrepreneurial pods while Citadel is more centralized and structured.
- Doug Garber explains Millennium seeks uncorrelated P&L streams, while Citadel emphasizes shared process and tighter guardrails.




