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
InstitutionKeystone Financial Group
Latest Disclosed Ownership171,707 shares
Latest Disclosed Value $ 3,844,518
Keystone Financial Group reports 7.06% increase in ownership of SPMB / SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF

On May 13, 2026 - Keystone Financial Group filed a 13F-HR form disclosing ownership of 171,707 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF (US:SPMB) valued at $3,844,520 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 160,385 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF. This represents a change in shares of 7.06% during the quarter. The current value of the position is $3,796,442 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)
2026-05-13 2026-03-31 13F STATE STREET Equtities 78464A383 171,707 11,322 7.06 3,845 6.93 0.2586
2026-02-06 2025-12-31 13F STATE STREET Equities 78464A383 160,385 6,325 4.11 3,595 3.99 0.2659
2025-11-17 2025-09-30 13F/A-1 SPDR MORTGAGE MF Closed and MF Open 78464A383 154,060 11,894 8.37 3,457 10.06 0.2642
2025-11-14 2025-09-30 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 142,166 0 3,142 0.2498
2025-08-13 2025-06-30 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 142,166 11,519 8.82 3,142 9.06 0.2835
2025-05-13 2025-03-31 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 130,647 2,545 1.99 2,881 4.35 0.2929
2025-02-13 2024-12-31 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 128,102 10,731 9.14 2,761 4.39 0.2715
2025-02-19 2024-09-30 13F/A-3 SPDR MORTGAGE MF Closed and MF Open 78464A383 117,371 117,371 2,644 0.3384
2025-02-18 2024-09-30 13F/A-2 SPDR MORTGAGE MF Closed and MF Open 78464A383 8,383 8,383 2,553 0.3322
2024-07-31 2024-06-30 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 0 -118,137 -100.00 0 -100.00
2024-05-08 2024-03-31 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 118,137 17,382 17.25 2,566 15.38 0.3738
2024-02-14 2023-12-31 13F/A-1 SPDR MORTGAGE MF Closed and MF Open 78464A383 100,755 4,240 4.39 2,224 10.76 0.3866
2024-02-09 2023-12-31 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 100,755 4,240 2,224 0.3866
2023-11-06 2023-09-30 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 96,515 84,561 707.39 2,008 668.97 0.3362
2023-08-07 2023-06-30 13F SPDR MORTGAGE MF Closed and MF Open 78464A383 11,954 11,954 262 0.0445
2018-05-15 2018-03-31 13F SPDR BLOOMBERG MF Closed and MF Open 78464A383 0 -24,797 -100.00 0 -100.00
2018-02-09 2017-12-31 13F SPDR BLOOMBERG MF Closed and MF Open 78464A383 24,797 24,797 903 0.5612
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.