Insights

Strategic Acquisition R.J. O’Brien is undergoing a major strategic transition as StoneX Group moves to acquire the firm for approximately 900 million, indicating a shift in capabilities, client base access, and potential changes in service levels and pricing.

Private Firm Footprint As a privately held, family-owned boutique with a long history and no proprietary trading, RJO emphasizes client-centric services and clearing capabilities, presenting opportunities to position complementary, non-conflicting fintech, risk management, or IB network enhancements.

Global Reach With a broad clearing membership across major exchanges and a strong international presence including EMEA leadership, there are opportunities to propose cross‑border liquidity solutions, compliance technologies, and multi‑jurisdictional reporting tools.

Regulatory Leadership Recent leadership appointments in global compliance and Hrvyst (ag tech) signal a continued focus on governance and innovative platforms; this creates openings for risk, regulatory tech, and automation vendors to support compliance and operational efficiency.

Tech Stack Modernization Existing technology stack shows reliance on established platforms (MySQL, ASP.NET, IIS, Kendo UI) with modern web initiatives; sales opportunities exist for integrated analytics, data management, and scalable cloud-based clearing and order-entry enhancements.

Similar companies to R.J. O'Brien

R.J. O'Brien Tech Stack

R.J. O'Brien uses 8 technology products and services including Microsoft Clarity, Amazon Web Services, Sucuri, and more. Explore R.J. O'Brien's tech stack below.

Media & News

R.J. O'Brien's Email Address Formats

R.J. O'Brien uses at least 4 email formats:
R.J. O'Brien Email FormatsExamplePercentage
FLast@rjobrien.comJDoe@rjobrien.com
95%
FirstL@rjobrien.comJohnD@rjobrien.com
3%
FirstLast@rjobrien.comJohnDoe@rjobrien.com
1%
First@rjobrien.comJohn@rjobrien.com
1%

Frequently Asked Questions

What is R.J. O'Brien's phone number?

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You can contact R.J. O'Brien's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is R.J. O'Brien's official website and social media links?

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R.J. O'Brien's official website is rjobrien.com and has social profiles on LinkedIn and Crunchbase.

How much revenue does R.J. O'Brien generate?

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As of August 2026, R.J. O'Brien's annual revenue is estimated to be $500M - $1B.

What is R.J. O'Brien's SIC code and NAICS code?

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R.J. O'Brien's SIC code is 6211 - Security Brokers, Dealers, and Flotation Companies and NAICS code is 52 - Finance and Insurance.

How many employees does R.J. O'Brien have currently?

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As of August 2026, R.J. O'Brien has approximately 454 employees across 3 continents, including North America, Europe and Asia. Key team members include Chief Operating Officer Emea At R. J. O'brien: G. L., Chief Operating Officer, London: N. R. and Vp Otc Structured Products: J. W. Explore R.J. O'Brien's employee directory with LeadIQ.

What industry does R.J. O'Brien belong to?

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R.J. O'Brien operates in the Financial Services industry.

What technology does R.J. O'Brien use?

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R.J. O'Brien's tech stack includes Microsoft Clarity, Amazon Web Services, Sucuri, WordPress, StackAdapt, Zendesk, Shopify and Microsoft 365.

What is R.J. O'Brien's email format?

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R.J. O'Brien's email format typically follows the pattern of FLast@rjobrien.com. Find more R.J. O'Brien email formats with LeadIQ.

When was R.J. O'Brien founded?

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R.J. O'Brien was founded in 1914.
R.J. O'Brien logo

R.J. O'Brien

Financial ServicesIllinois, United States201-500 Employees

R.J. O'Brien & Associates LLC is a financial services company that operates as a futures brokerage and clearing firm, headquartered at 222 South Riverside Plaza Suite 1200, Chicago, Illinois 60606, and it has between 501 and 1,000 employees. It is a futures commission merchant (FCM) and is described as the oldest and largest independent futures brokerage and clearing firm in the United States, with a boutique profile. The firm is a full clearing member of CME Group and all its markets, Intercontinental Exchange, NYSE Liffe U.S., and the CBOE Futures Exchange, providing 24-hour execution and clearing on futures exchanges worldwide. It serves a global network of introducing brokers and clients, including more than 400 introducing brokers and many large financial, industrial, and agricultural institutions, and it clears more than 100,000 client accounts while not engaging in proprietary trading. In 2025, StoneX Group announced an agreement to acquire R.J. O'Brien Limited, and the company maintains a website at https://rjobrien.com.

Section iconCompany Overview

Phone number
SIC Code
6211 - Security Brokers, Dealers, and Flotation Companies
NAICS Code
52 - Finance and Insurance
Founded
1914
Employees
201-500

Section iconFunding & Financials

  • $500M - $1B

    R.J. O'Brien's revenue is estimated to be in the range of $500M - $1B

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