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
InstitutionMorgan Stanley
Latest Disclosed Ownership1,891,983 shares
Latest Disclosed Value $ 42,361,513
Morgan Stanley reports 5.66% increase in ownership of SPMB / SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,891,983 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF (US:SPMB) valued at $42,361,499 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 1,790,660 shares of SPDR Series Trust - State Street SPDR Portfolio Mortgage Backed Bond ETF. This represents a change in shares of 5.66% during the quarter. The current value of the position is $42,020,942 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 1,891,983 101,323 5.66 42,362 5.54 0.0026
2026-05-27 2025-12-31 13F/A-1 SPDR SERIES TRUST STATE STREET SPD 78464A383 1,790,660 168,114 10.36 40,138 10.24 0.0024
2026-02-13 2025-12-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A383 1,790,660 168,114 40,138 0.0024
2026-05-27 2025-09-30 13F/A-1 SPDR SERIES TRUST PORT MTG BK ETF 78464A383 1,622,546 174,517 12.05 36,410 13.77 0.0022
2025-11-14 2025-09-30 13F SPDR SERIES TRUST PORT MTG BK ETF 78464A383 1,622,546 174,517 36,410 0.0022
2025-08-15 2025-06-30 13F SPDR SERIES TRUST PORT MTG BK ETF 78464A383 1,448,029 15,057 1.05 32,001 1.28 0.0021
2025-05-15 2025-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,432,972 -30,308 -2.07 31,597 0.20 0.0023
2025-05-15 2024-12-31 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,463,280 20,984 1.45 31,534 -2.96 0.0022
2025-02-14 2024-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,463,280 20,984 31,534 0.0022
2025-05-14 2024-09-30 13F/A-2 SPDR SER TR PORT MTG BK ETF 78464A383 1,442,296 14,518 1.02 32,495 5.51 0.0024
2025-02-14 2024-09-30 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,442,296 14,518 32,495 0.0024
2024-11-14 2024-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,442,296 14,518 32,495 0.0003
2025-05-14 2024-06-30 13F/A-2 SPDR SER TR PORT MTG BK ETF 78464A383 1,427,778 37,953 2.73 30,797 2.02 0.0024
2024-10-17 2024-06-30 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,427,778 37,953 30,797 0.0024
2024-08-14 2024-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,427,778 37,953 30,797 0.0024
2024-10-17 2024-03-31 13F/A-2 SPDR SER TR PORT MTG BK ETF 78464A383 1,389,825 -177,758 -11.34 30,187 -12.74 0.0024
2024-08-16 2024-03-31 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,389,825 -177,758 30,187 0.0003
2024-05-15 2024-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,389,825 -177,758 30,187 0.0024
2024-08-16 2023-12-31 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,567,583 267,188 20.55 34,597 27.91 0.0030
2024-02-13 2023-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,567,583 267,188 34,597 0.0030
2023-11-15 2023-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,300,395 71,355 5.81 27,048 0.45 0.0028
2023-08-14 2023-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,229,040 -18,689 -1.50 26,928 -2.70 0.0027
2023-05-15 2023-03-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,247,729 -1,808 -0.14 27,675 2.07 0.0030
2023-02-14 2022-12-31 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,249,537 45,960 3.82 27,115 5.02 0.0031
2022-11-14 2022-09-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,203,577 65,122 5.72 25,817 -0.76 0.0035
2022-10-27 2022-06-30 13F/A-1 SPDR SER TR PORT MTG BK ETF 78464A383 1,138,455 967,714 566.77 26,014 535.88 0.0034
2022-08-15 2022-06-30 13F SPDR SER TR PORT MTG BK ETF 78464A383 1,138,455 967,714 26,014 0.0007
2022-10-27 2022-03-31 13F/A-1 SPDR SER TR PORTFLI MORTGAGE 78464A383 170,741 -32,774 -16.10 4,091 -20.79 0.0006
2022-05-13 2022-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 170,741 -32,774 4,091 0.0006
2022-02-14 2021-12-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 203,515 -59,774 -22.70 5,165 -23.73 0.0006
2021-11-15 2021-09-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 263,289 -50,215 -16.02 6,772 -16.47 0.0009
2021-08-23 2021-06-30 13F/A-1 SPDR SER TR PORTFLI MORTGAGE 78464A383 313,504 -872,606 -73.57 8,107 -73.64 0.0011
2021-08-16 2021-06-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 313,504 -872,606 8,107 0.0002
2021-05-17 2021-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 1,186,110 493,005 71.13 30,756 67.96 0.0045
2021-02-16 2020-12-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 693,105 428,918 162.35 18,312 160.19 0.0028
2020-11-13 2020-09-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 264,187 42,780 19.32 7,038 18.66 0.0014
2020-08-14 2020-06-30 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 221,407 -461,390 -67.57 5,931 -67.46 0.0013
2020-05-26 2020-03-31 13F/A-1 SPDR SER TR PORTFLI MORTGAGE 78464A383 682,797 567,096 490.14 18,224 503.24 0.0050
2020-05-15 2020-03-31 13F SPDR SER TR PORTFLI MORTGAGE 78464A383 682,797 567,096 18,224 1,399.9831
2020-02-14 2019-12-31 13F SPDR SERIES TRUST PORTFLI MORTGAGE 78464A383 115,701 -41,113 -26.22 3,021 -26.67 0.0007
2019-11-14 2019-09-30 13F SPDR SERIES TRUST PORTFLI MORTGAGE 78464A383 156,814 3,978 2.60 4,120 3.13 0.0011
2019-08-14 2019-06-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 152,836 -15,599 -9.26 3,995 -8.16 0.0011
2019-05-15 2019-03-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 168,435 27,869 19.83 4,350 21.78 0.0012
2019-02-14 2018-12-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 140,566 75,537 116.16 3,572 117.94 0.0011
2019-04-23 2018-09-30 13F/A-2 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 65,029 -23,717 -26.72 1,639 -27.16 0.0004
2018-11-20 2018-09-30 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 65,029 0 1,639 0.0004
2018-11-14 2018-09-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 65,029 -23,717 1,639
2019-04-23 2018-06-30 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 88,746 321 0.36 2,250 -0.79 0.0006
2018-08-14 2018-06-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 88,746 321 2,250
2019-04-23 2018-03-31 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 88,425 9,846 12.53 2,268 10.90 0.0006
2018-05-14 2018-03-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 88,425 9,846 2,268
2019-04-23 2017-12-31 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 78,579 -6,204 -7.32 2,045 -8.38 0.0006
2018-02-14 2017-12-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 78,579 -6,204 2,045
2017-11-14 2017-09-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 84,783 14,379 20.42 2,232 20.58 0.0007
2017-08-11 2017-06-30 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 70,404 5,348 8.22 1,851 8.12 0.0006
2017-05-22 2017-03-31 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 65,056 11,198 20.79 1,712 20.99 0.0005
2017-05-12 2017-03-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 65,056 1,712
2017-02-22 2016-12-31 13F/A-1 SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 53,858 -2,948 -5.19 1,415 -8.35 0.0005
2017-02-13 2016-12-31 13F SPDR SERIES TRUST BLOMBRG BRC MRTG 78464A383 53,858 1,415
2016-11-10 2016-09-30 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 56,806 -3,270 -5.44 1,544 -5.62 0.0005
2016-08-12 2016-06-30 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 60,076 2,671 4.65 1,636 4.80 0.0006
2016-05-12 2016-03-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 57,405 11,133 24.06 1,561 25.79 0.0006
2016-02-09 2015-12-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 46,272 -543 -1.16 1,241 -2.13 0.0004
2016-02-08 2015-09-30 13F/A-1 SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 46,815 33,517 252.05 1,268 255.18 0.0005
2015-11-09 2015-09-30 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 46,815 1,268
2015-08-12 2015-06-30 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 13,298 -215 -1.59 357 -3.77 0.0001
2015-05-14 2015-03-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 13,513 -8,216 -37.81 371 -37.12 0.0001
2015-02-13 2014-12-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 21,729 6,447 42.19 590 41.83 0.0002
2014-12-16 2014-09-30 13F/A-1 SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 15,282 -129,941 -89.48 416 -89.36 0.0002
2014-11-14 2014-09-30 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 15,282 416
2014-05-13 2014-03-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 145,223 3,239 2.28 3,908 3.66 0.0016
2014-02-13 2013-12-31 13F SPDR SERIES TRUST BRC MTG BCKD BD 78464A383 141,984 2,590 1.86 3,770 0.72 0.0016
2013-11-13 2013-09-30 13F SPDR BCLY CP MRT COM 78464A383 139,394 126,246 960.19 3,743 972.49 0.0018
2013-08-08 2013-06-30 13F SPDR BCLY CP MRT COM 78464A383 13,148 13,148 349 0.0002
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.