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Super Investors State Street Aggregate Bond Index Portfolio

State Street Aggregate Bond Index Portfolio

State Street Institutional Investment Trust · net assets $6.2B · 6800 holdings as of June 30, 2026. Monthly N-PORT disclosure: the full book, not just equities.

Asset mix

DBT: 71.9% · ABS-MBS: 24.2% · STIV: 3.6% · ABS-O: 0.3%

Financial position

Total assets
$6.39B
Total liabilities
$192M
Net assets
$6.2B
Assets attributable to miscellaneous securities
$0
Assets invested in controlled foreign corporations
$0
Borrowings payable within one year
$0
Payable to controlled companies within one year
$0
Payable to other affiliates within one year
$0
Other liabilities payable within one year
$0
Borrowings payable after one year
$0
Payable to controlled companies after one year
$0
Payable to other affiliates after one year
$0
Other liabilities payable after one year
$0
Payables for delayed-delivery investments
$3.45M
Payables for standby commitments
$0
Liquidation preference of outstanding preferred stock
$0
Cash not reported in Parts C or D
$404K

Monthly flows and gains

Month 1 Month 2 Month 3
Sales $93.1M $189M $304M
Reinvestment $20.6M $20.6M $21.4M
Redemptions $154M $42M $392M
Net realized gain (non-derivative) $-1.63M $-866K $-7.35M
Net unrealized appreciation (non-derivative) $-12.2M $-946K $1.37M

The three months of the reporting period, as filed; month 3 ends June 30, 2026.

Credit spread risk (change in value per 1bp spread move)

Tenor Investment grade Non-investment grade
3 months $-1.92K $-30.2
1 year $-113K $-2.26K
5 years $-340K $-7.4K
10 years $-454K $-4.08K
30 years $-290K $-577

Filing details

Registrant
State Street Institutional Investment Trust
Registrant CIK
1107414
Registrant LEI
549300P1E098W6ES7M39
Series
State Street Aggregate Bond Index Portfolio
Series ID
S000046031
Series LEI
549300CYRPLDVB2ZTF93
SEC file number
811-09819
Address
One Congress Street, Boston, US-MA, 02114, US
Phone
(800) 647-7327
Form
NPORT-P
Filed
August 28, 2026
Report period ends
December 31, 2026
Report month ends
June 30, 2026
Accession number
000141036826089147
Holding Value % of net assets
State Street Global Advisors STIV $130M 2.10%
State Street Global Advisors STIV $71.8M 1.16%
State Street Global Advisors STIV $26.5M 0.43%
United States Treasury DBT $26.4M 0.43%
United States Treasury DBT $26.2M 0.42%
United States Treasury DBT $24.9M 0.40%
United States Treasury DBT $24.3M 0.39%
United States Treasury DBT $24.2M 0.39%
United States Treasury DBT $23.9M 0.39%
United States Treasury DBT $23.8M 0.38%
United States Treasury DBT $23.7M 0.38%
United States Treasury DBT $22.6M 0.36%
United States Treasury DBT $22.2M 0.36%
United States Treasury DBT $22.1M 0.36%
United States Treasury DBT $22M 0.35%
United States Treasury DBT $21.8M 0.35%
United States Treasury DBT $21.7M 0.35%
United States Treasury DBT $21.5M 0.35%
United States Treasury DBT $21.4M 0.35%
United States Treasury DBT $20.6M 0.33%
United States Treasury DBT $20.1M 0.32%
United States Treasury DBT $20M 0.32%
United States Treasury DBT $19.9M 0.32%
United States Treasury DBT $19.9M 0.32%
United States Treasury DBT $19.9M 0.32%
United States Treasury DBT $19.8M 0.32%
United States Treasury DBT $19.7M 0.32%
United States Treasury DBT $19.4M 0.31%
United States Treasury DBT $19.3M 0.31%
United States Treasury DBT $19.2M 0.31%
United States Treasury DBT $18.9M 0.31%
United States Treasury DBT $18.9M 0.31%
United States Treasury DBT $18.8M 0.30%
United States Treasury DBT $18.6M 0.30%
United States Treasury DBT $18M 0.29%
United States Treasury DBT $18M 0.29%
United States Treasury DBT $17.9M 0.29%
United States Treasury DBT $17.8M 0.29%
Freddie Mac ABS-MBS $17.6M 0.28%
United States Treasury DBT $17.6M 0.28%
United States Treasury DBT $17.6M 0.28%
United States Treasury DBT $17.5M 0.28%
United States Treasury DBT $17.4M 0.28%
United States Treasury DBT $17M 0.27%
United States Treasury DBT $16.8M 0.27%
United States Treasury DBT $16.8M 0.27%
United States Treasury DBT $16.6M 0.27%
United States Treasury DBT $16.5M 0.27%
United States Treasury DBT $16.2M 0.26%
Fannie Mae ABS-MBS $16.1M 0.26%
United States Treasury DBT $16.1M 0.26%
United States Treasury DBT $16M 0.26%
United States Treasury DBT $16M 0.26%
United States Treasury DBT $15.9M 0.26%
United States Treasury DBT $15.8M 0.25%
United States Treasury DBT $15.7M 0.25%
United States Treasury DBT $15.6M 0.25%
United States Treasury DBT $15.5M 0.25%
United States Treasury DBT $15.3M 0.25%
United States Treasury DBT $15.3M 0.25%

Showing top 60 of 6800 holdings.

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