Top Illinois Financial Services Companies (425)

As the foundation for secure markets, OCC is a customer-driven organization that delivers world-class Risk Management, Clearing, and Settlement Services for a sophisticated mix of financial products that includes standard options, stock loans, and futures contracts.

Alliant is unlike any other financial institution — a digital credit union that wows our members. We’re boldly disrupting banking norms to do good for our members, employees and communities. With 90 years of history and more than $19 billion in assets, Alliant Credit Union is the largest credit union in Illinois and one of the largest in the U.S. Our industry-leading...

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re building a resilient economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help...

At Capital One, we think and work like a tech company, using our digital fluency to transform everything about the customer experience. We’re bending data to our will, and turning a stodgy industry on its head. That’s reflected in our ranking as the number one business technology innovator in the U.S. in the 2016 InformationWeek Elite 100.

As the world’s largest asset manager, BlackRock partners with investors around the globe to help them (and those on whose behalf they invest) plan for life’s most important goals – like retirement, home ownership and their children’s education. Our clients range from governments, foundations and other large institutions to those investing on behalf of individuals, including firefighters, nurses, teachers and...

We are a global investment research and financial data company with 40-plus offices across North America, Europe, Australia, and Asia. Our products and services are used daily by individual investors, financial advisors, asset managers, retirement plan providers, and institutional investors. We provide data, research, and analysis across managed investment products, publicly listed companies, private capital markets, debt securities, and real-time...

Enova International (NYSE: ENVA) is a leading online financial services company that serves small businesses and consumers who are underserved by traditional banks. For over 20 years, Enova has provided over $72 billion in loans and financing to more than 15 million customers by offering a suite of market-leading products powered by the company's world-class analytics, machine learning algorithms and...

Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market’s...

TransUnion is a global information and insights company that makes trust possible by ensuring that each consumer is reliably and safely represented in the marketplace. We do this by having an accurate and comprehensive picture of each person. This picture is grounded in our legacy as a credit reporting agency which enables us to tap into both credit and public record...

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage...

NinjaTrader's engineering, product, and operations teams build for nearly 4 million futures traders worldwide. Real users, real markets, real confidence in the tech behind every trade. We've been at this since 2003 — launching our own brokerage in 2014 and our FCM in 2021 — and we know what scale looks like in this category. In 2025, NinjaTrader joined Kraken and...

CWAN was founded on a simple belief: investment professionals deserve modern technology that actually works for them. Not legacy systems that slow them down. Not fragmented data that creates confusion. But one comprehensive platform that gives you complete visibility and crystal-clear insights. The result? Investment management that works as seamlessly as your investment strategy. Since our founding in 2004, CWAN has been...

Coupa is a global technology company that helps businesses run smarter by connecting all the ways they spend money — from procurement and expenses to payments and supply chain decisions — in one intelligent platform. In simple terms, Coupa gives organizations the visibility and control they need to make better financial choices, reduce waste, and drive real impact. It’s where...

Clear Street’s mission is to give every sophisticated investor access to every asset, in every market, through a unified platform built for speed, transparency and scale. We give our clients the technology, tools, and service once reserved for the largest institutions, rebuilt with modern infrastructure. Our single, cloud-native, end-to-end capital markets platform powers investor growth today and is transforming how they...

Together, we turn ambition into action. For more than three decades, Citadel has captured undiscovered market opportunities in markets around the world by empowering extraordinary people to pursue their best and boldest ideas. We strive to identify the highest and best uses of capital to generate superior long-term returns for the world’s preeminent public and private institutions.

Geneva Trading LLC is a leading proprietary trading firm with a history of consistent success in the listed derivatives markets. Over the past 20 years, we’ve grown significant capital, developed proven technology, and maintained an appetite for diversified trading strategies. We foster innovation and look for people who can solve complex problems that drive immediate results. We've built a culture of...

At Affirm, we help people say yes to the things that matter with flexible, transparent ways to pay over time. No hidden fees, no compound interest, and no fine print—just a smarter way to spend.

YCharts was founded in 2009 to democratize investment research. As we build an increasingly powerful and intuitive tool that our clients use daily, we might be outgrowing our name—but not our mission. From humble beginnings, YCharts has grown to become an all-in-one platform for investment research and client communication. Our guiding principle has always been to create software that elevates and...

Energy CX is a family-founded energy broker redefining how businesses buy energy. Powered by ABEL™, a proprietary platform, the company uses math-based trading methodologies to help customers treat energy like an investment, not a line item. Energy CX replaces fragmented tools and legacy broker models with a centralized, technology-led approach—reducing risk, controlling spend, and bringing clarity to complex energy markets....

MarketAxess is on a journey to digitally transform one of the world's largest financial markets, enabling the shift from analog, phone-based trading to a fully electronic marketplace. Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There...