Rail-Splitter Capital Management LLC
Data sourced from SEC public records (and other sources when available). Refreshed weekly • Updated today.
About
Rail-Splitter Capital Management provides investment advisory services to high‑net‑worth individuals, families, trusts and estates, offering both discretionary and non‑discretionary portfolio management, retirement account guidance, and related oversight. Portfolios are typically built from individual stocks and exchange‑traded funds, with bonds and third‑party (independent) managers used as appropriate and legacy holdings retained when warranted for tax or fit reasons.
The firm emphasizes a fundamentally driven, generally long‑term approach combined with ongoing personal contact to align portfolios with each client’s objectives, risk tolerance and time horizon. RSCM conducts internal due diligence on investments, rebalances or trades as needed for cash needs or tax management, and monitors any independent managers it employs.
Notably, RSCM sponsors a wrap fee program that bundles covered transaction and custodial costs into its advisory fee—a structure uncommon among peers—and maintains an institutional relationship with Goldman Sachs that provides research, software and other economic benefits. The firm’s $484 million in assets across roughly 34 client relationships, together with its recent SEC registration and the addition of non‑discretionary services, reflects a concentrated, higher‑touch client focus rather than a mass‑market retail practice.
Client services
Expertise
Fee options
$0+: 0.40% annually +: up to 2.00% annually
Fee-only: Investment advisory fees range from 0.40% to 2.00% annually, based on client and relationship factors.
Main office
588 Lincoln Avenue, Suite 200
Winnetka IL 60093
Advisors at this office
3
Most active in
Illinois
Disclosures
Exclamation point means they have disclosures of this type. Check mark means no disclosures of this type were found.
Business activities & affiliations
Is not active or affiliated with:
-
Insurance agent
They sell insurance products and may earn commissions on those sales.
-
Broker-dealer / trader
They provide brokerage services and may earn transaction-based compensation in addition to advisory fees.
-
Bank
They're affiliated with a bank that may offer its own financial products and services.
-
Trust company
They provide trust and estate administration services, typically for separate fees.
-
Fund sponsor
They manage or sponsor investment funds and may earn management or performance-based fees if clients invest in them.
-
Accountant / CPA / tax prep
They offer tax and accounting services, typically for separate fees.
-
Lawyer
They provide legal services, typically billed separately.
-
Real estate agent
They facilitate real estate transactions and may earn commissions.
-
Other specialized services
They may provide services such as pension consulting or municipal advisory work, typically for separate fees.
Advisors at this firm
Thomas C
Series 63, Series 65
Winnetka, IL
Rail-Splitter Capital Management LLC
Thomas Croghan is a financial advisor at Rail-Splitter Capital Management LLC with 42 years of industry experience. He holds the Series 63 and Series 65 designations and previously worked for 15 years at Wintrust Investments LLC. Rail-Splitter Capital Management provides investment advisory services to high-net-worth individuals, families, trusts, and estates, focusing on fundamentally driven, long-term portfolio management. The firm offers both discretionary and non-discretionary services and sponsors a wrap fee program that includes transaction and custodial costs within its advisory fee structure.
John S
Series 63, Series 65
Winnetka, IL
Rail-Splitter Capital Management LLC
John Souter Jr. is a financial advisor at Rail-Splitter Capital Management LLC with two years of industry experience. He holds Series 63 and Series 65 licenses and previously worked at Delta Investment Management, LLC. Rail-Splitter Capital Management provides investment advisory services to high-net-worth individuals, families, trusts, and estates, offering both discretionary and non-discretionary portfolio management. The firm employs a fundamentally driven, long-term approach with personalized client engagement and sponsors a wrap fee program that includes transaction and custodial costs within its advisory fee.
Daria M
Series 66
Winnetka, IL
Rail-Splitter Capital Management LLC
Daria Mack is a financial advisor at Rail-Splitter Capital Management LLC with 24 years of industry experience. She holds a Series 66 designation and previously worked at LPL Financial and Wintrust Investments LLC. Rail-Splitter Capital Management provides investment advisory services to high-net-worth individuals, families, trusts, and estates, focusing on fundamentally driven, long-term portfolio management that incorporates individual stocks, ETFs, bonds, and independent managers as appropriate. The firm offers both discretionary and non-discretionary services and maintains an institutional relationship with Goldman Sachs to support its investment process.
Not sure where to start?
We'll help you think it through—whether you ultimately need an advisor or not. Warmer helps you compare advisors clearly, so you can choose with confidence.
For advisor listings, we rely on sources including public filings and data provided by advisors, and we cannot guarantee that all information is current or accurate. Advisors are independent and may not have reviewed or updated this information. Please review an advisor’s Form ADV and do your own diligence before deciding whether to work with them.
Advisor matching and introductions are provided by FinanceHQ LLC (“FHQ”), a wholly-owned subsidiary of Warmer and an SEC-registered investment advisor. We receive compensation from certain participating advisors for introductions or referrals. This creates a conflict of interest because we have an incentive to recommend advisors who compensate us, including those who pay us more. You pay no fee to use our matching service, and advisor fees are not increased because of a referral or introduction. We do not review the ongoing performance of advisors, manage or hold assets, guarantee performance, or provide advice about specific investments.
By using our service, you agree to our Terms of Service and Advisory Agreement, and acknowledge our Privacy Policy. Please review FHQ’s ADV Part 2A and Form CRS. Logos provided by Logo.dev
© 2026 Warmer Holdings Inc. (“Warmer”)