SIIT S&P 500 INDEX FUND
U.S. stock index fund · tracks S&P 500 Index
As of its 2026 Q2 report, SIIT S&P 500 INDEX FUND held 506 positions with $4.59B in net assets. Its ten largest holdings made up 39.2% of the fund. The SPINX share class costs 0.12% a year. Over the 12 months to May 2026, SPINX returned 29.7%, with dividends reinvested. In 2026 Q2 it added 9 new positions and exited 8.
Investment results that correspond to the aggregate price and dividend performance of the securities in the S&P 500 Index.
The fund seeks to replicate the performance of the S&P 500 Index by investing substantially all assets in securities composing the Index in approximately the same proportions, with day-to-day security selection delegated to a sub-adviser under the general supervision of SEI Investments Management Corporation. The sub-adviser may employ sampling or optimization techniques to track the Index, and may also use futures contracts, ADRs, ETFs, and REITs to achieve replication. Because it may not be practicable to hold all Index securities in their exact weightings, the fund's return may diverge from the Index return.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
7.76% | $356.21M | 1.7M | $211.14 | |
APPLE INC. | 6.93% | $318.07M | 1.0M | $312.06 |
5.06% | $232.10M | 515.5K | $450.24 | |
AMAZON.COM, INC. | 4.00% | $183.56M | 678.2K | $270.64 |
GOOGLALPHABET INC. | 3.35% | $153.73M | 404.2K | $380.34 |
AVGOBROADCOM INC. | 3.20% | $147.05M | 329.1K | $446.77 |
GOOGALPHABET INC. | 2.66% | $122.21M | 324.7K | $376.43 |
N/A | 2.25% | $103.30M | — | — |
2.09% | $96.04M | 151.8K | $632.51 | |
TSLATESLA, INC. | 1.85% | $85.08M | 195.2K | $435.79 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-05-31 — not a live quote, and not what the fund paid.
The 200 largest of 506 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 | 98.25% |
| Derivatives | 2.25% |
| Cash & short-term | 1.55% |
Derivatives are shown at market value, not notional exposure.
By sector
- Information Technology
- 37.2%
- Financials
- 10.3%
- Communication Services
- 10.0%
- Consumer Discretionary
- 9.4%
- 9 other sectors
- 33.1%
- Information Technology
- 37.2%
- Financials
- 10.3%
- Communication Services
- 10.0%
- Consumer Discretionary
- 9.4%
- Health Care
- 8.0%
- Industrials
- 7.9%
- Consumer Staples
- 4.4%
- Energy
- 3.0%
- Other
- 2.7%
- Utilities
- 2.0%
- Real Estate
- 1.7%
- Materials
- 1.7%
- Cash
- 1.5%
How it has done
SPINX share class · total returns with dividends reinvested
Volatility over the last 12 months: 13.14%. Past returns are a record, not a forecast.
Fees & fund details
SIIT S&P 500 INDEX FUND is a U.S. equity index fund that tracks the S&P 500 Index. 23% of SPINX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 80% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Expense ratio, by class
- 0.12%· SPINX 0.12%
- Portfolio turnover
- 5.00% a year · as of 2025 Q3
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.
9 new· the largest 7
8 exited· the largest 7
Understand how this fund fits with the rest.
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