
Mega venture
Source: Pitchbook, Bloomberg, Reuters, HarbourVest; Notes: Companies shown in “Mega Venture” represent six of the 10 highest valued unicorns. As of December 2025. The General Partners and/or companies shown above are intended for illustrative purposes only. A reference to a specific General Partner or company does not constitute a recommendation to invest nor an indication that HarbourVest funds or accounts hold any specific General Partner or company.
Key takeaway
While traditional venture capital continues to fuel early-stage innovation, mega venture is quickly defining a new capital market opportunity where disruptive innovation, hyper growth, and record funding levels are creating some of the most highly valued companies in the world.
As innovation cycles accelerate, particularly in artificial intelligence, aerospace, defense, and fintech, the venture capital ecosystem is expanding beyond its traditional boundaries. New pathways for investors to access growth and innovation are being created as a result. For the first time, the same company can be simultaneously characterized as a venture-backed startup and a large-cap incumbent.
This shift is also altering the strategic calculus for “OG” incumbents. Firms like NVIDIA, Microsoft, Meta, Alphabet, NASA, and the DoD are investing in, and partnering with, startups not only to gain early access to innovation but to strategically position themselves for success in this rapidly changing market opportunity. As mega deals become more common they are signaling a maturing venture market that is reshaping how innovation is funded, scaled, and brought to market. Investors brave enough to embrace this dynamic shift can potentially stay ahead of the growth curve by tapping into early innovators that can help enhance their portfolios.
The HarbourVest advantage
Diversification does not ensure a profit or protect against a loss.
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