SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF
US ˙ ARCA

SecuritySPMB / SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF
InstitutionFmr Llc
Latest Disclosed Ownership17,681 shares
Latest Disclosed Value $ 395,881
Fmr Llc reports 12.38% increase in ownership of SPMB / SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 17,681 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF (US:SPMB) valued at $395,878 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,733 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF. This represents a change in shares of 12.38% during the quarter. The current value of the position is $392,695 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A383 17,681 1,948 12.38 396 12.22 0.0000
2026-02-17 2025-12-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A383 15,733 6,873 77.57 353 77.78 0.0000
2025-11-13 2025-09-30 13F SPDR SERIES TRUST PORT MTG BK ETF 78464A383 8,860 3,300 59.35 199 62.30 0.0000
2025-08-14 2025-06-30 13F SPDR SERIES TRUST PORT MTG BK ETF 78464A383 5,560 -1,828 -24.74 123 -24.69 0.0000
2025-05-12 2025-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 7,388 4,008 118.58 163 125.00 0.0000
2025-02-13 2024-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 3,380 -4,204 -55.43 73 -57.65 0.0000
2024-11-13 2024-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 7,584 6,016 383.67 171 415.15 0.0000
2024-08-13 2024-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,568 -6,004 -79.29 34 -79.88 0.0000
2024-05-13 2024-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 7,572 7,270 2,407.28 164 2,633.33 0.0000
2024-02-13 2023-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 302 -1,876 -86.13 7 -86.67 0.0000
2023-11-13 2023-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 2,178 454 26.33 45 21.62 0.0000
2023-08-11 2023-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,724 1,050 155.79 38 164.29 0.0000
2023-08-11 2023-03-31 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 674 672 33,600.00 15 0.0000
2023-05-11 2023-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 674 672 15 0.0000
2023-02-13 2022-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 2 2 0 0.0000
2022-11-10 2022-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 0 -697 -100.00 0 -100.00
2022-08-12 2022-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 697 -1,613 -69.83 16 -70.91 0.0000
2022-05-13 2022-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 2,310 2,241 3,247.83 55 2,650.00 0.0000
2022-02-14 2021-12-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 69 -1,301 -94.96 2 -94.29 0.0000
2022-02-14 2021-09-30 13F/A-1 SPDR SER TR PORTFLI MORTGAGE 78464A383 1,370 226 19.76 35 16.67 0.0000
2021-11-15 2021-09-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 1,370 226 35 0.0000
2021-08-13 2021-06-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 1,144 936 450.00 30 500.00 0.0000
2021-05-14 2021-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 208 -193 -48.13 5 -54.55 0.0000
2021-02-08 2020-12-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 401 -94 -18.99 11 -15.38 0.0000
2020-11-13 2020-09-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 495 -366 -42.51 13 -43.48 0.0000
2020-08-24 2020-06-30 13F/A-1 SPDR SER TR PORTFLI MORTGAGE 78464A383 861 -16 -1.82 23 0.00 0.0000
2020-08-13 2020-06-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 861 -16 23 0.5650
2020-05-14 2020-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 877 877 23 0.0000
2019-08-13 2019-06-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 0 -1 -100.00 0 0.0000
2019-05-13 2019-03-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 1 1 0 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.