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SSDOX

State Street Target Retirement 2055 Fund

Actively managedTarget-dateOpen-end fund
STATE STREET INSTITUTIONAL INVESTMENT TRUST: SSDOX · SSDQX · SSAWXHoldings as of Jun 30, 2026Filed Aug 28, 2026

Target-date 2055 fund

As of its 2026 Q2 report, State Street Target Retirement 2055 Fund held 5 positions with $2.44B in net assets. Its ten largest holdings made up 100.9% of the fund. The SSDOX share class costs 0.29% a year. Over the 12 months to May 2026, SSDOX returned 28.1%, with dividends reinvested. In 2026 Q2 it added no new positions and exited none.

2026 Q2 holdings and allocationChanges are against the previous quarter, 2026 Q1Headline fees and returns use the SSDOX share class
Expense ratio · SSDOX
0.29%
$29 a year for every $10,000 invested
0.09% – 0.59% across the 3 classes
$2.44B
The whole fund, all share classes
5 holdings
100.9%in the top 10
Weight held in the ten largest holdings
Top 25 hold 100.9%
Return, 1 year · SSDOX
+28.1%
With dividends, to May 2026
3 yr total +70.6% · 5 yr total +52.3%
What this fund is
Objective, as filed

The investment objective of the State Street Target Retirement 2055 Fund (the Target Retirement 2055 Fund ? or the Fund) is to seek capital growth and income over the long term.

Strategy, summarised

The fund is a fund of funds that invests in a combination of mutual funds and ETFs sponsored by the adviser, holding equity and fixed-income securities worldwide including emerging markets and real estate. The fund's asset allocation shifts progressively toward fixed income and away from equities as its 2055 target retirement date approaches, reflecting a glide path designed to reduce risk over time. The adviser may deviate from target allocations at its discretion and may modify the selection of underlying funds.

What you own

per cent of the fund
CompanyWeightValue
SSEYXState Street Equity 500 Index II Portfolio
39.30%
$959.36M
SSGVXState Street Global All Cap Equity ex-U.S. Index Portfolio
38.30%
$934.86M
SSMHXState Street Small/Mid Cap Equity Index Portfolio
13.57%
$331.19M
State Street SPDR Portfolio Long Term Treasury ETF
9.59%
$233.94M
GVMXXState Street Global Advisors
0.15%
$3.65M
Showing 1–5 of 5 · the top 10 are 100.91% of the fund, the top 25 are 100.91%

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.

All 5 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%.

101.79%
of net assets
Stocks88.73%
Bonds9.48%
Cash & short-term3.54%
Other0.02%
Derivatives0.01%

Look-through blends 4 underlying funds; 0.0% of NAV was not looked through and stays direct-classified.

How it has done

Total return, dividends reinvested · to May 2026

SSDOX share class · total returns with dividends reinvested

1 year
+28.10%
3 years
+70.62%
Cumulative, not per year
5 years
+52.31%
Cumulative, not per year
Largest decline in 3 years
-10.89%
From a previous high to a later low
Cumulative return, last three years· Jul 2023 – May 2026

Volatility over the last 12 months: 12.10%. 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.

The 3 share classes hold the same portfolio

Share classExpense ratio1 year3 years5 yearsWorst fall
0.29%+28.10%+70.62%+52.31%-10.89%
0.09%+28.38%+71.51%+54.82%-10.89%
0.59%+27.70%+68.92%—-10.99%

These classes hold the same portfolio, so the 2.58pp spread over 3 years is the cost difference between them — roughly 0.86pp a year — not a difference in what they own.

Fees & fund details

State Street Target Retirement 2055 Fund is a target-date 2055 fund.

Asset class
Target-date
Region
United States
Management
Actively managed
Fund type
Open-end fund
Target year
2055
Features
Fund of funds
Expense ratio, by class
0.09% – 0.59%· SSDOX 0.29%
Portfolio turnover
17.00% a year · as of 2026 Q2

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

2026 Q2 vs 2026 Q1

Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.

0 new

0 exited

Connected research

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