Autonomy Capital is a global macro investment firm focused on structural transformation across countries, economies, and industries. Website or institutional source

Auspice Capital Advisors is a quantitative investment manager specializing in commodity and managed-futures strategies. Website or institutional source

Aurelius Capital Management is a distressed-debt and value-oriented investment firm associated with complex corporate, municipal, and sovereign credit situations. Website or institutional source

Aspect Capital is a specialist systematic manager with deep experience in managed futures, trend following, macro, and diversified quantitative strategies. Website or institutional source

Artemis Capital Management is a volatility and derivatives specialist associated with quantitative, behavioral, and regime-aware approaches to nonlinear markets. Website or institutional source

Aristeia Capital is an alternative asset manager focused on relative-value and corporate-credit strategies. Website or institutional source

Argonaut Funds Management is a high-conviction resources investor operating strategies focused on Australian and global mining companies, natural resources, gold, and precious metals. Website or institutional source

Arcesium provides enterprise data management, investment operations, treasury, accounting, and reporting infrastructure for hedge funds, asset managers, and private-markets firms. Website or institutional source

AQR Capital Management is one of the most influential institutions in modern quantitative investing. Website or institutional source

Apptopia provides mobile-app performance and consumer-activity data covering downloads, usage, engagement, retention, revenue estimates, and market share. Website or institutional source

Appital provides institutional equity liquidity discovery and execution workflow for asset managers seeking to execute larger orders with lower market impact. Website or institutional source

Andurand Capital Management is one of the most recognizable specialist commodity hedge fund firms. Website or institutional source

Ancora Holdings Group is a diversified investment firm with a sustained activist practice, particularly in U.S. Website or institutional source

Anatole Investment Management is a Hong Kong-based hedge fund manager employing a long/short equity strategy grounded in deep, bottom-up fundamental research. Website or institutional source

AmiBroker is a long-established technical-analysis, portfolio-backtesting, optimization, scanning, and automated-trading platform. Website or institutional source

AMD Solarflare is a portfolio of low-latency Ethernet adapters and kernel-bypass networking software designed for electronic trading and high-performance data centers. Website or institutional source

Ambrus Group is a volatility-focused investment manager associated with options, tail-risk, and capital-efficient hedging strategies. Website or institutional source

Alter Domus is a global alternatives-focused administrator with deep capabilities across private equity, private debt, real assets, infrastructure, and related fund structures. Website or institutional source

Alpine Associates Management is a long-established merger-arbitrage manager focused on announced corporate transactions and related equity opportunities. Website or institutional source

Alta Fox Capital Management is a research-driven investment firm with an activist orientation toward small- and mid-cap public companies. Website or institutional source