SIIT S&P 500 INDEX FUND
SEI INSTITUTIONAL INVESTMENTS TRUST · 1 share class
Fund classification
Classified from what the fund holds · as of 2026 Q2
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
Fund profile
As filed in the prospectus · 2025 Q3
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.
| Share class | Expense ratio |
|---|---|
| SPINX | 0.12% |
Portfolio turnover 5.00% · as of 2025 Q3
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Stocks | 98.25% |
| Derivatives | 2.25% |
| Cash & short-term | 1.55% |
Derivatives are shown at market value, not notional exposure.
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Information Technology | 37.2% |
| Financials | 10.8% |
| Communication Services | 10.0% |
| Consumer Discretionary | 9.4% |
| 9 smaller | 32.6% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Portfolio growth profile
How much of the fund’s stock holdings are in fast-growing companies · as of 2026 Q2
Share of the fund’s equity (by value) in companies whose trailing five-year revenue — or net-income — growth ranks in the top 25% of U.S. public companies. Foreign and newly-listed holdings are excluded, so the figure covers only part of the book. From SEC filings — not investment advice. How we measure this.
Latest quarter
What changed since the fund's previous filing
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
May 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.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Reported price | Value | Shares |
|---|---|---|---|---|---|
| NVDA | NVIDIA CORPORATIONNVDA | 7.76% | $211.14 | $356.21M | 1.7M |
| — | APPLE INC. | 6.93% | $312.06 | $318.07M | 1.0M |
| MSFT | MICROSOFT CORPORATIONMSFT | 5.06% | $450.24 | $232.10M | 515.5K |
| — | AMAZON.COM, INC. | 4.00% | $270.64 | $183.56M | 678.2K |
| GOOGL | ALPHABET INC.GOOGL | 3.35% | $380.34 | $153.73M | 404.2K |
| AVGO | BROADCOM INC.AVGO | 3.20% | $446.77 | $147.05M | 329.1K |
| GOOG | ALPHABET INC.GOOG | 2.66% | $376.43 | $122.21M | 324.7K |
| — | N/A | 2.25% | — | $103.30M | — |
| META | META PLATFORMS, INC.META | 2.09% | $632.51 | $96.04M | 151.8K |
| TSLA | TESLA, INC.TSLA | 1.85% | $435.79 | $85.08M | 195.2K |
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.
Top 10 positions are 39.17% of net assets, top 25 54.25%, across 501 issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
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