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SSMHX

STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO

Index fundEquityTracks the Russell Small Cap Completeness IndexOpen-end fund
STATE STREET INSTITUTIONAL INVESTMENT TRUST: SSMHXHoldings as of Jun 30, 2026Filed Aug 28, 2026

U.S. stock index fund · tracks Russell Small Cap Completeness Index

As of its 2026 Q2 report, STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO held 2,472 positions with $3.10B in net assets. Its ten largest holdings made up 13.0% of the fund. The SSMHX share class costs 0.01% a year. Over the 12 months to May 2026, SSMHX returned 30.4%, with dividends reinvested. In 2026 Q2 it added 188 new positions and exited 170.

2026 Q2 holdings and allocationChanges are against the previous quarter, 2026 Q1Headline fees and returns use the SSMHX share class
Expense ratio · SSMHX
0.01%
$1 a year for every $10,000 invested
one share class
$3.10B
The whole fund, all share classes
2,472 holdings
13.0%in the top 10
Weight held in the ten largest holdings
Top 25 hold 18.7%
Return, 1 year · SSMHX
+30.4%
With dividends, to May 2026
3 yr total +79.4% · 5 yr total +40.9%
What this fund is
Objective, as filed

The State Street Small/Mid Cap Equity Index Portfolio (the Small/Mid Cap Equity Index Portfolio ? or the Portfolio) seeks to provide investment results that, before expenses, correspond generally to the total return of an index that tracks the performance of mid-to small- capitalization exchange traded U.S. equity securities.

Strategy, summarised

The fund tracks the Russell Small Cap Completeness Index, which comprises Russell 3000 companies excluding S&P 500 constituents, using a passive indexing approach. Under various circumstances the fund may purchase a sample of index stocks rather than all constituents, which can cause its returns to diverge from the index. The fund may use futures, options, or swaps on the index in lieu of direct stock ownership.

What you own

per cent of the fund
CompanyWeightValue
GVMXXState Street Global Advisors
5.91%
$183.38M
SPCXSpace Exploration Technologies Corp
1.00%
$31.05M
0.95%
$29.57M
0.91%
$28.07M
0.87%
$26.92M
0.82%
$25.54M
Spotify Technology SA
0.81%
$25.14M
0.61%
$18.83M
0.56%
$17.33M
NU Holdings Ltd/Cayman Islands
0.52%
$16.08M
Showing 1–10 of 2,472 · the top 10 are 12.96% of the fund, the top 25 are 18.75%

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 2,472 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%.

105.79%
of net assets
Stocks99.06%
Cash & short-term6.72%
Derivatives0.02%

Look-through blends 1 underlying fund; 0.005% of NAV was not looked through and stays direct-classified. The blend is as of 2026Q1, one or more quarters before the direct holdings (2026Q2).

By sector

Industrials
18.5%
Information Technology
17.4%
Financials
13.6%
Health Care
12.3%
11 other sectors
38.3%

How it has done

Total return, dividends reinvested · to May 2026

SSMHX share class · total returns with dividends reinvested

1 year
+30.37%
3 years
+79.41%
Cumulative, not per year
5 years
+40.95%
Cumulative, not per year
Largest decline in 3 years
-15.36%
From a previous high to a later low
Cumulative return, last three years· Jul 2023 – May 2026

Volatility over the last 12 months: 12.20%. 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

STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO is a U.S. equity index fund that tracks the Russell Small Cap Completeness Index. 32% of SSMHX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 83% of the fund’s equity).

Asset class
Equity
Region
United States
Management
Index (passive)
Fund type
Open-end fund
Features
Master-feeder
Expense ratio, by class
0.01%· SSMHX 0.01%
Portfolio turnover
26.00% a year · as of 2026 Q2

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.

188 new· the largest 8

Space Exploration Technologies CorpSPCX
IREN Ltd
Ascendis Pharma A/S
JFrog Ltd
GFL Environmental Inc

170 exited· the largest 8

Flex Ltd
Masimo Corp
Air Lease Corp
Clearwater Analytics Holdings Inc
Sealed Air Corp
Connected research

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