next-gen
record-keeping tech

TRANSACTION PROCESSING — TRADE EXECUTION — CASH MANAGEMENT — SUB-ACCOUNT RECORDKEEPING — TRUST RECONCILIATION — CUSTOMIZABLE REPORTING

ARK empowers retirement plan providers with a unified but modular retirement account servicing solution. Built with open, developer-friendly APIs for effortless integration.

Say goodbye to legacy infrastructure that's holding you back. Meet the growing demands of plan sponsors, advisors, and investors—and adapt to regulatory changes—faster than ever.

Redefine what's possible with minute-by-minute processing on ANY security—ETFs, stocks, even crypto. Across ANY account—401(k)s, non-quals, IRAs, taxable...

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RECORD-KEEPING REBUILT FROM THE GROUND UP

ARK isn’t layered on top of legacy systems—it’s a purpose-built replacement for traditional recordkeeping infrastructure. We’ve re-architected what recordkeeping can be—
cloud-native, real-time, and flexible.

Modern Tech Stack

Built on modern, cloud-based infrastructure, our platform handles any number of participants, plans, or transactions with near zero operating costs.

Infinitely scalable without compromising on speed or cost.

Modern Tech
Stack
Minute-by-Minute
Trading & Recordkeeping

Real-time, minute-by-minute trading and recordkeeping that processes transactions faster than ever.

Ensuring everyone can see the impact of changes made to an account instantly.

Minute-by-Minute
Trading & Recordkeeping
ANY Security

ARK supports investing across any asset class, including ETFs, stocks, and even crypto which trade and fluctuate in real time.

That means plans are unburdened by having to invest in securities that offer once-daily pricing and execution with dollar certainty (i.e., mutual funds).

BUT, mutual funds work too :)

ANY Security
Back-Office Operations Simplified

ARK’s innovative top-down approach to transaction processing and cash management eliminates the need for manual oversight.

You no longer have to spend endless hours tracking transactions, reversing errors, releasing trades one by one,  in an attempt to hold together a disjointed and complex system. With ARK  the entire system is always in sync and reconciled.

Back-Office Operations Simplified
Custodial Simplicity

Accessing the features and benefits of a brokerage account no longer requires SDBAs or cumbersome custodial structures— ARK consolidates all activity into a single brokerage account per trust,  eliminating the need to open a separate account for each participant, reducing transaction costs, and simplifying administration.

Because ARK is custodian agnostic you can choose any custodian for any asset— even low and zero-commission brokers are now an option.

Custodial Simplicity & Flexibility

building better systems, affordably

Drive growth and operational efficiency

Arnie is truly open architecture:

Integrations are flexible and scalable—any custodian, order routing system, asset manager, financial planning tool, existing recordkeeping and administration infrastructure, or any web interface.  

Our modular architecture supports staged rollouts so you can implement ARK in phases to align with your goals and timeline.

MADE FOR EVERY USER

Advisors

Develop relationships with plan participants

Portfolios without limitations

Offer personalization without the legwork

Continue using familiar portfolio mgmt & trading systems

Real-time visibility for participants

Custodian agnostic
Plan Sponsors & TPAs

Unlimited plan and benefit types

Ability to handle plans of all sizes

Highly configurable rules engines that can model complex eligibility, vesting, matching, and distribution rules

Custom reporting queries

Integrated compliance testing and document generation

Automation and straight through processing
Investors

Holistic wealth management

Unlimited portfolio customization—stocks, crypto, ESG vales, and more

Accounts respond to portfolio changes immediately

Same day contributions and distributions processing

Self-service transactions

Intuitive design that makes complex choices simple and easy

Compliance

Unmatched precision in roles & permissions mgmt. Define access down to a specific position within a specific account.

Complete control—without compromise.
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© 2025 Arnie, Inc.

Recordkeeping services provided by Arnie Technologies LLC. Plan administration services provided by Arnie, Inc.
Any reference to the advisory services refers to Arnie Advisors LLC, a subsidiary of Arnie, Inc. through which investment services are provided. Arnie, Inc. is an SEC-Registered Investment Advisor. Registration does not imply a certain level of skill or training nor does it imply endorsement by the SEC. Personalized investment guidance is optional. Past performance is not an indication of future returns. There are risks involved with investing. This material has been provided for informational purposes only, and is not intended to provide investment, legal or tax advice.