S&P 500 Index Master Portfolio
U.S. stock index fund
As of its 2026 Q2 report, S&P 500 Index Master Portfolio held 508 positions with $59.77B in net assets. Its ten largest holdings made up 35.9% of the fund. Over the 12 months to May 2026, it returned 29.7%, with dividends reinvested. In 2026 Q2 it added 10 new positions and exited 9.
S&P 500 Index Master Portfolio is U.S. equity index fund.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
NVDANVIDIA Corp | 7.42% | $4.43B | 22.2M | $200.09 |
AAPLApple Inc | 6.51% | $3.89B | 13.4M | $289.36 |
MSFTMicrosoft Corp | 4.24% | $2.54B | 6.8M | $373.02 |
AMZNAmazon.com Inc | 3.57% | $2.13B | 9.0M | $238.34 |
GOOGLAlphabet Inc | 3.21% | $1.92B | 5.4M | $357.37 |
AVGOBroadcom Inc | 2.74% | $1.64B | 4.3M | $377.75 |
GOOGAlphabet Inc | 2.56% | $1.53B | 4.3M | $353.33 |
1.99% | $1.19B | 1.0M | $1,154.29 | |
1.89% | $1.13B | 2.0M | $563.29 | |
TSLATesla Inc | 1.81% | $1.08B | 2.6M | $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 508 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 | 99.38% |
| Cash & short-term | 0.91% |
Look-through blends 1 underlying fund; 0.0% of NAV was not looked through and stays direct-classified.
By sector
- Information Technology
- 36.9%
- Financials
- 11.3%
- Communication Services
- 9.5%
- Consumer Discretionary
- 9.1%
- 10 other sectors
- 33.2%
- Information Technology
- 36.9%
- Financials
- 11.3%
- Communication Services
- 9.5%
- Consumer Discretionary
- 9.1%
- Health Care
- 8.6%
- Industrials
- 8.2%
- Consumer Staples
- 4.5%
- Energy
- 2.9%
- Utilities
- 2.2%
- International
- 2.1%
- Real Estate
- 1.8%
- Materials
- 1.4%
- Cash
- 0.9%
- Other
- 0.7%
How it has done
C000012007 share class · total returns with dividends reinvested
Volatility over the last 12 months: 13.14%. 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
S&P 500 Index Master Portfolio is a U.S. equity index fund. 21% of S&P 500 Index Master Portfolio’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 96% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Features
- Master-feeder
This fund files no prospectus profile. Unit investment trusts and closed-end funds register on forms that carry no objective or fee tagging, and some fund families file without it — a gap in what was filed, not a fund without an objective or without fees.
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
9 exited· the largest 8
Understand how this fund fits with the rest.
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