Stock Index Fund
U.S. stock index fund · tracks S&P 500 Index
As of its 2026 Q2 report, Stock Index Fund held 507 positions with $19.39B in net assets. Its ten largest holdings made up 36.0% of the fund. The NOSIX share class costs 0.05% a year. Over the 12 months to May 2026, NOSIX returned 29.7%, with dividends reinvested. In 2026 Q2 it added 10 new positions and exited 10.
The Fund seeks to provide investment results approximating the aggregate price and dividend performance of the securities included in the S&P 500 Index (the Index).
The fund tracks the S&P 500 Index using a passive indexing approach, holding substantially all securities in the index in approximately the same weightings, though it may use optimization to minimize tracking error and manage transaction costs when full replication is impracticable. Because the fund may not hold every security in the index or in identical proportions, its quarterly performance may diverge from the index. The fund's information technology sector exposure exceeds 15% of assets, reflecting the index's own concentration.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
NVDANVIDIA CORP | 7.44% | $1.44B | 7.2M | $200.09 |
AAPLAPPLE INC | 6.52% | $1.26B | 4.4M | $289.36 |
4.25% | $824.67M | 2.2M | $373.02 | |
AMZNAMAZON.COM INC | 3.58% | $694.35M | 2.9M | $238.34 |
GOOGLALPHABET INC | 3.22% | $623.63M | 1.7M | $357.37 |
AVGOBROADCOM INC | 2.75% | $532.27M | 1.4M | $377.75 |
GOOGALPHABET INC | 2.56% | $496.98M | 1.4M | $353.33 |
2.00% | $387.38M | 335.6K | $1,154.29 | |
1.90% | $368.12M | 653.5K | $563.29 | |
TSLATESLA INC | 1.82% | $352.37M | 837.8K | $420.60 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-06-30 — not a live quote, and not what the fund paid.
The 200 largest of 507 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Stocks | 98.94% |
| Cash & short-term | 1.07% |
| Derivatives | 1.04% |
| Bonds | 0.07% |
Derivatives are shown at market value, not notional exposure.
By sector
- Information Technology
- 37.2%
- Financials
- 11.5%
- Communication Services
- 9.5%
- Consumer Discretionary
- 9.2%
- 10 other sectors
- 32.7%
- Information Technology
- 37.2%
- Financials
- 11.5%
- Communication Services
- 9.5%
- Consumer Discretionary
- 9.2%
- Industrials
- 8.7%
- Health Care
- 8.7%
- Consumer Staples
- 4.4%
- Energy
- 2.9%
- Utilities
- 2.1%
- Real Estate
- 1.8%
- Materials
- 1.8%
- Cash
- 1.1%
- Other
- 1.0%
- Government
- 0.1%
How it has done
NOSIX share class · total returns with dividends reinvested
Volatility over the last 12 months: 13.12%. Past returns are a record, not a forecast.
Jun 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Fees & fund details
Stock Index Fund is a U.S. equity index fund that tracks the S&P 500 Index. 21% of NOSIX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 100% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Expense ratio, by class
- 0.05%· NOSIX 0.05%
- Portfolio turnover
- 3.43% a year · as of 2025 Q3
Net is what a holder pays after the adviser's contractual waiver; gross is before it. A waiver can expire.
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
10 new· the largest 8
10 exited· the largest 8
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-06-30
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Zero-coupon or unclassified | 100.0% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 100.0% |
Based on what filers reported; a filer that never reported a flag also reads as none.
Understand how this fund fits with the rest.
Explore shared holdings, compare funds and follow their businesses with your connected AI:
- “Where do my funds overlap — NOSIX, QQQ and the fund in my 401(k)?”
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