SURO Capital Corp.

Mark Klein, the founder and CEO, leads all investment decisions. Klein structured the firm's public listing in 2010 and continues to oversee portfolio construction from New York. The firm does not operate with a large investment committee — Klein's background in structured finance and public equities informs a concentrated, high-conviction approach to late-stage technology investments.

SURO is neither a traditional venture capital firm nor a credit fund. It is a publicly traded business development company (BDC) that takes equity positions in late-stage private technology companies. The structure allows it to hold companies longer than a venture fund can, but it does not make loans or structured credit investments — it uses equity checks of $5 million to $25 million to buy minority stakes with board rights.

Because SURO is a publicly traded BDC with no fund expiration date, it can hold a position indefinitely — it held Palantir for over a decade before and after its IPO. This removes the pressure to sell at a specific point in the cycle, allowing the firm to wait for favorable market conditions rather than return capital to limited partners on a fixed timeline. The tradeoff is quarterly mark-to-market volatility that private fund investors do not see.

SURO targets late-stage growth companies that are 12 to 36 months from a liquidity event, typically an IPO or strategic acquisition. It does not invest at seed or early-stage rounds. The firm looks for companies with proven unit economics that need bridge capital, and it prefers to take board seats or observer rights as part of the investment terms.

Yes. SURO trades on Nasdaq under the ticker SSSS, making it one of the few publicly listed vehicles through which investors can gain exposure to a concentrated portfolio of late-stage private technology companies. The firm publishes its holdings quarterly in SEC filings, providing more transparency than a typical private fund — though this also means the share price can diverge from the underlying net asset value.

No. SURO Capital is a publicly traded entity organized as a business development company. It is not a family office, and it does not manage capital for a single wealthy family or operate a philanthropic foundation. Mark Klein structured it as a public vehicle from inception, and the shareholder base is distributed across institutional and retail investors.

The firm concentrates on enterprise software, fintech, digital health, and media. Its public filings have disclosed positions in companies like Palantir Technologies and Coursera. SURO avoids sectors with long regulatory cycles or asset-heavy business models, preferring capital-light technology companies that are on a visible path to public markets.