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Nathaniel “Nat” Guild founded Apex Equity Research LLC in 2011 and serves as its President. The firm provides investment research to financial institutions, fund managers and other fiduciaries, and its reports identify and analyze risk factors for a wide variety of US equities. Mr. Guild is an expert in the critical analysis of competitive business strategies. He also has extensive experience translating complex market events into reports for individuals who manage their own portfolio or take an active role in their managed portfolio relationship. 

In May 2025, the firm launched a semi-monthly investment newsletter, Market Risks, to help investment advisors and individual investors focus on the most important information for long-term investment decisions. Market Risks cuts through the endless barrage of noise from Wall Street bloggers, analysts and financial media to consolidate financial market data and geo-political events into concise, understandable content that is essential to managing long-term investments. Importantly, with Market Risks, Mr. Guild takes a long-term view whereas most analysts focus on short-term events, which are helpful, if at all, to day traders. The goal is to save long-term investors hours of cumbersome research, circular arguments, and potential confusion to ultimately help lower their investment risk.

Mr. Guild has spent most of his career providing in-depth investment analysis across a broad range of topics for institutional clients, including some of the largest and most well-known mutual and hedge funds. Prior to founding Apex, he was co-founder and president of Short Alert, a short-only research firm that produced both general release and client specific financial reports. Barron’s recognized his work in a cover story (July 6, 2009), which documented a market outperformance of +28.1% per year for ten years. In addition to Barron’s, he has appeared in other respected financial journals Fortune, Smart Money and the Wall Street Journal.

Mr. Guild’s work was also the subject of a research paper by professors at Southern Methodist University that found his work produced exceptional returns over a seven-year period from 1998 through 2005.

Mr. Guild received a Masters in Management from the Sloan School at M.I.T., where he graduated from a two-year program in 12 months with a perfect GPA. He received his undergraduate degree in Biology from Harvard College. He is a past member of the Kennedy Institute of Politics Advisory Committee, and in 2008, he accepted the Harvard Alumni Association award for outstanding contributions to the University. On a personal note, he was a member of the American Association of Editorial Cartoonists, a Massachusetts schoolboy champion in the two-mile run, and is the very proud father of two adult sons.