A Boston-based technology-focused investment firm managing public and private capital, founded and led by Brad Gerstner, known for major growth-stage bets in AI, cloud, and infrastructure companies.
Japanese multinational holding company and investment conglomerate that owns major stakes in telecom, semiconductor design (Arm), and AI infrastructure/data centers, and runs the Vision Fund venture investment arm.
The Verdict: Altimeter Capital vs SoftBank
Altimeter Capital and SoftBank both make large, concentrated AI infrastructure bets but differ by an order of magnitude in scale and structure. Altimeter, founded by Brad Gerstner in Boston in 2008, runs a hybrid public/private technology fund with AUM around $12.7B as of mid-2025, split between a long/short public equities book and growth-stage private investments. SoftBank, a publicly traded (9984.T) Tokyo conglomerate founded in 1981, deploys through its Vision Fund vehicle, which manages roughly $166B in AUM across 332 companies spanning AI, robotics, telecom, and its Arm semiconductor stake.
Growth-stage AI and cloud companies seeking a fast-moving, thesis-driven lead investor with public-market crossover credibility go to Altimeter, run directly by Gerstner with concentrated conviction bets. Companies needing SoftBank-scale capital — nine- and ten-figure checks across dozens of portfolio companies — or investors wanting exposure to a diversified, publicly traded holding company spanning telecom, chips, and AI infrastructure look to SoftBank instead.
Frequently asked questions
How does Altimeter Capital's AUM compare to SoftBank's Vision Fund?
SoftBank's Vision Fund is roughly 13x larger, managing about $166B in AUM versus Altimeter's roughly $12.7B as of mid-2025. SoftBank is also publicly traded (ticker 9984.T) while Altimeter remains a private investment firm.
Is Altimeter Capital a venture capital firm?
Not purely — Altimeter runs both a long/short public equities hedge fund and private growth-stage investments, founded by Brad Gerstner in 2008. It's better described as a technology-focused investment firm than a traditional VC.
What does SoftBank invest in besides startups?
SoftBank owns major stakes in telecom and Arm, the semiconductor design company, alongside its Vision Fund venture arm. The Vision Fund itself holds roughly $166B in AUM across 332 AI, robotics, and infrastructure companies as of 2025.
Data from Value Add Pulse coverage and company research — see the full threads for Altimeter Capital and SoftBank.