Thrive Capital's inaugural investor letter reveals how entirely OpenAI has come to shape its identity.

      Thrive Capital, led by Joshua Kushner, has issued its first official letter to investors, and its remarkable figure encapsulates the AI era succinctly. One of its funds has reached approximately $3.7 billion in value, largely fueled by early investments in OpenAI and SpaceX. The letter, highlighted by Bloomberg, serves as both a celebration and a subtle safeguard.

      The fact that Thrive is communicating with its investors is significant on its own. Kushner has crafted one of the most secretive yet desirable firms in venture capital; thus, a formal letter featuring concrete figures and an honest comment on concentration marks a notable shift and reflects a sense of assurance.

      This communication comes at a time when the entire industry is debating whether AI valuations represent genuine value or mere optimistic speculation, making it particularly striking for a firm with such exposure to a single entity to reveal its operations.

      Thrive's investment in OpenAI is essentially a narrative of the industry's growth. The firm initially supported the company in 2022 at a valuation of $29 billion, led a tender offer the following year at $86 billion, and has since invested around a billion more across funding rounds that valued OpenAI at $150 billion and then $285 billion.

      As the company prepares for a potential trillion-dollar IPO, those initial investments have multiplied significantly, at least theoretically.

      The $3.7 billion valuation is also heavily influenced by Thrive’s stake in Elon Musk’s SpaceX, another private powerhouse experiencing continuous valuation growth. Together, these two investments constitute the majority of the fund’s profits, a concentration that would typically concern most portfolio managers, yet Thrive is presenting this as justification for its approach.

      However, there is a crucial caveat: nearly all of that value remains unrealized. The gains are based on theoretical valuations, reliant on OpenAI’s and SpaceX’s continued increases, with a larger portion of Thrive’s paper profits now dependent on OpenAI alone.

      On paper, the firm appears to be enjoying a remarkable decade, but the cash generated is significantly less, and paper wealth tends to diminish as soon as the market shifts.

      This reality makes another point in the letter significant: Thrive is selling a portion of its OpenAI stake, taking some profits even while stating that the journey is just beginning. Reducing exposure to a winning investment is standard risk management but also quietly acknowledges a fundamental truth in venture capital: a theoretical valuation is not the same as actual liquid wealth until it is realized through a sale.

      Thrive has emerged as a major player due to these investments, now managing around $25 billion and closing a record $10 billion fund this year, its largest to date and reportedly oversubscribed—indicative of limited partners’ willingness to continue backing a strategy centered on a few large private stakes.

      Additionally, Kushner has initiated a separate entity, Thrive Holdings, to acquire traditional service companies and enhance them with AI technology.

      The timing of this letter is particularly critical amidst growing concerns about whether AI-generated revenues can substantiate the lofty valuations, and whether the sector could be a bubble poised to burst. Funds that depend on a single high-flying private valuation risk appearing vulnerable rather than savvy.

      Thrive’s impressive figures are a result of OpenAI’s persistent valuation increase. For now, it stands out as one of the pivotal venture investments of the era. Kushner backed OpenAI when it was still relatively unknown and has seen its influence expand to the core of the economy.

      What remains unanswered in the letter is the fate of a fund like this when OpenAI’s private valuation ceases its ascension, as returns that exist solely as theoretical marks can disappear nearly as swiftly as they emerged.