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Custom Index Systems, LLC
Custom Index Systems, LLC, doing business as Quantum Portfolio Management, is a registered investment adviser headquartered in New York, NY. Organized as an LLC under Delaware law and registered with the SEC (CRD #326280), the firm sponsors and manages portfolio services, particularly through a wrap-fee program. It primarily serves high-net-worth individuals, businesses, and institutions by offering asset management and related investment solutions. The firm provides access to a variety of financial products and index-based strategies, leveraging licensed intellectual property from leading index providers. The fiscal year ends December 31.
Investment Strategy
Quantum Portfolio Management provides portfolio management services via a wrap-fee program, combining asset management, brokerage, and custody into a single fee structure. Investment strategies are primarily index-focused, utilizing proprietary and licensed methodologies from globally recognized index providers such as Russell, FTSE, S&P, MSCI, and Research Affiliates. The approach allows clients diversified exposure and cost efficiency, with investments aligned to custom and fundamental index constructs. Through its affiliations, the firm can offer fixed income, prime brokerage, and investment banking services.
Latest 13F Filing Activity
Custom Index Systems, LLC filed their most recent 13F report on Jun 30, 2025 disclosing 230 equity positions with a total 13F market value of $210M. The fund increased holdings in Nvidia Corporation, Ishares TR, Broadcom Inc. among other positions. Custom Index Systems, LLC reduced exposure to Vanguard Index FDS, Apple Inc., Jefferies Finl Group Inc. among others.
Top Holdings
Equity Positions (230)
| Ticker | Security | Weight | Market Value | Shares | Avg Cost | Price | Change (QoQ) |
|---|---|---|---|---|---|---|---|
A AAPL | APPLE INC | 4.87% | $10.2M | 49,795 | $201.38 | $205.17 | -$1.0M |
N NVDA | NVIDIA CORPORATION | 3.55% | $7.5M | 47,156 | $72.31 | $157.99 | +$2.3M |
F FTRB | FEDERATED HERMES ETF TRUST | 2.29% | $4.8M | 191,161 | $25.54 | $25.10 | +$665.9K |
I IWF | ISHARES TR | 2.20% | $4.6M | 10,880 | $307.04 | $424.58 | +$732.7K |
M MSFT | MICROSOFT CORP | 2.19% | $4.6M | 9,232 | $387.57 | $497.41 | +$383.2K |
Industry Allocation
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