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Cornerstone Portfolio Research
Cornerstone Portfolio Research was founded in the mid-1990s by a group of investment professionals who met at a major US bank.
Cornerstone Portfolio Research
Cornerstone Portfolio Research was founded in the mid-1990s by a group of investment professionals who met at a major US bank. The firm's wealth origin ties to the founders' personal capital and early institutional seed money from a Midwest-based endowment (per public record). Cornerstone has never accepted retail capital, remaining a niche vehicle for high-net-worth individuals and family offices. The strategy centers on concentrated equity portfolios (typically 15-25 positions) spanning US large-cap growth and value, with occasional international exposure. The firm avoids leverage, options, or derivatives, relying entirely on fundamental bottom-up research. Cornerstone has disclosed positions in firms like Microsoft and Berkshire Hathaway (per public filings). Geographic footprint is exclusively US, with no emerging-market or European mandates. Team size has fluctuated between 8 and 15 professionals over its history, with a lean research staff of sector analysts. The firm maintains a single office in a suburban US location (per public record). The principals have also served on advisory boards of several public companies (per firm biographies). No recent operational event (12-24 months) is verifiable from public sources. The structural differentiator is Cornerstone's client education requirement: prospective investors must attend a series of seminars on the firm's investment methodology before being accepted. That slows AUM growth but aligns commitment duration. Succession planning around the original founders remains a material governance question.
General information
Firm type
Asset Manager
Year founded
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AUM
Undisclosed
Location
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Corporate office
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Frequently asked questions
Who runs investment decisions at Cornerstone Portfolio Research?
Cornerstone is led by its founding team of former bank analysts, though individual names are not publicly promoted. The firm maintains a flat research structure with each sector analyst contributing directly to buy/sell decisions (per public record).
How does Cornerstone source proprietary deal flow?
Cornerstone does not rely on proprietary deal flow; it invests exclusively in public equities. The firm's edge comes from deep fundamental research on companies it already follows, often holding positions for 5-10 years (per the firm's published whitepapers).
Is Cornerstone structured as a family office or a traditional asset manager?
Cornerstone is a registered investment advisor (RIA) and functions as a traditional asset manager, not a family office. It serves multiple clients including family offices, endowments, and high-net-worth individuals (per public filings).
Does Cornerstone accept fund commitments or only direct accounts?
Cornerstone manages both separately managed accounts (SMAs) and a pooled vehicle. Client capital is commingled in a single strategy portfolio, with no co-investment or direct-deal options (per firm documentation).
What investment stages does Cornerstone target?
Cornerstone targets only publicly traded companies across the market-cap spectrum, from mid-cap to mega-cap. It does not invest in private companies, venture-stage, or pre-IPO offerings (per public record).
Which sectors does Cornerstone explicitly avoid?
Cornerstone has publicly stated it avoids commodity-oriented sectors (energy, metals, agriculture) and companies with high financial leverage (per whitepapers). It also avoids industries it considers insufficiently transparent, such as biotech pre-FDA approval.
What is Cornerstone's known posture on co-investments alongside external GPs?
Cornerstone does not participate in co-investments. Its mandate restricts itself to public-market equities, and no partnership structure exists with private equity or venture capital firms (per public record).
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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