When David Rewcastle founded E3 Research Associates in Darien, Connecticut, in January 2018, he was making a deliberate bet on a specific idea: that institutional investors increasingly want research untangled from the conflicts that shadow the large firms. After three decades inside the industry, he had watched too much analysis get shaped, subtly or otherwise, by the investment banking relationships sitting on the other side of the wall. E3 was his answer. An independent, third-party research shop where the analysis answers to the data and nothing else.
Eight years on, the firm has become the vehicle through which one of the most decorated energy analysts of his generation does his most focused work, a few miles from the financial center of the world but deliberately outside it.
What E3 Research Associates Does
E3 Research Associates provides in-depth, data-driven research and analysis across three areas that give the firm its name: equities, energy, and economics. The firm serves institutional investors and both publicly listed and privately held companies, combining quantitative analysis and risk management techniques with fundamental and technical study. Its work centers on reading macro social and economic trends to identify the opportunities and risks that move markets in equities, commodities, and the broader economy.
The firm's original concentration was the sector Rewcastle built his reputation in: energy and utilities. Over the past several years he has expanded E3's coverage into biotechnology, a sector with its own distinct rhythms of risk and valuation, and one that has become a growing part of the firm's client conversations. Across all of it, the through-line is the same. Careful, evidence-based research delivered without hype.
Why Independence Matters
The value of an independent research firm lies in what it does not have to worry about. When research and investment banking share a roof, the analyst's judgment can be pulled, consciously or not, toward the interests of the banking clients. Independent firms like E3 carry no such baggage. Their analysis is driven by sector expertise and data alone, which is precisely why institutional investors have come to value the independent research niche.
Rewcastle has described the appeal of the model in practical terms. Freed from the machinery of a large firm, he can concentrate on the analysis itself and deliver conclusions that reflect what the evidence actually says, whether or not those conclusions are convenient. For clients making real capital decisions in volatile sectors like energy and biotech, that clarity is the entire point.
The Analyst Behind the Firm
The credibility of E3 rests substantially on the track record of the man who runs it. Rewcastle spent nearly two decades as a security analyst before founding the firm, most formatively at Argus Research, where he covered a portfolio of energy services, gas utilities, and related sectors and delivered long and short recommendations to portfolio managers.
His stock-picking earned national recognition. He won the Wall Street Journal's "Best on the Street" award for portfolio performance in the oilfield services sector. StarMine and Forbes named him the top-ranked stock picker in the gas utility sector, and StarMine and the Financial Times ranked him the number three analyst in the U.S. gas utility sector. He holds FINRA Series 7, 63, 86, and 87 licenses, and he is cited regularly on energy, gas utility, and unconventional energy markets by outlets including Bloomberg, The Wall Street Journal, Reuters, Forbes, Barron's, and USA Today.
That authority is built on an unusually grounded foundation. Rewcastle did not start on a trading floor. He began in 1988 as a field analyst with Schlumberger's Seismic Exploration Group in Alberta, Canada, interpreting seismic data and helping structure bids for oil and gas exploration projects. He studied political science and petroleum economics at the University of Calgary, then spent time at the American University in Cairo and Damascus University learning Arabic and the political economy of the Middle East. Before he ever rated an energy stock, he understood the physical industry underneath it.
Rooted in Darien
Rewcastle runs E3 from Darien, and the location is not incidental. Fairfield County places him close enough to New York to stay connected to the financial world while keeping the deliberate distance that independent work benefits from. He teaches economics at the University of New Haven and previously taught valuation, finance, and energy investment strategy at New York University's School of Professional Studies, and that instinct for clear explanation carries directly into how E3 communicates its research to clients.
He remains an active member of the New York City Energy Forum, the New York Society of Security Analysts, and the National Association of Petroleum Investment Analysts, keeping the firm's analysis connected to the professional networks where energy and finance intersect. From a base in a Connecticut community, he continues to contribute to national conversations on energy markets, delivering the kind of independent, evidence-driven research that a firm designed from the start to be free of conflicts is uniquely positioned to provide.
David Rewcastle is the founder and Senior Analyst of E3 Research Associates in Darien, Connecticut. More information is available at davidrewcastle.com.