State Street SPDR S&P MIDCAP 400 ETF Trust
US ˙ ARCA ˙ US78467Y1073

SecurityMDY / State Street SPDR S&P MIDCAP 400 ETF Trust
InstitutionBlackRock, Inc.
Latest Disclosed Ownership23,092 shares
Latest Disclosed Value $ 14,242,035
BlackRock, Inc. reports 16.16% increase in ownership of MDY / State Street SPDR S&P MIDCAP 400 ETF Trust

On May 13, 2026 - BlackRock, Inc. filed a 13F-HR form disclosing ownership of 23,092 shares of State Street SPDR S&P MIDCAP 400 ETF Trust (US:MDY) valued at $14,242,222 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 19,879 shares of State Street SPDR S&P MIDCAP 400 ETF Trust. This represents a change in shares of 16.16% during the quarter. The current value of the position is $15,577,632 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 STR SPDR S&P MIDCAP 40 UTSER1 S&PDCRP 78467Y107 23,092 3,213 16.16 14,242 18.76 0.0000
2026-02-12 2025-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 19,879 12,255 160.74 11,993 163.97 0.0002
2025-11-12 2025-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 7,624 -31,901 -80.71 4,544 -79.71 0.0001
2025-08-12 2025-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 39,525 -12,829 -24.50 22,390 -19.84 0.0004
2025-05-02 2025-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 52,354 -1,245 -2.32 27,930 -8.51 0.0006
2025-02-07 2024-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 53,599 15,594 41.03 30,529 41.01 0.0006
2024-11-13 2024-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 38,005 -18,040 -32.19 21,650 -27.81 0.0005
2024-08-13 2024-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 56,045 20,310 56.84 29,989 50.83 0.0007
2024-05-10 2024-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 35,735 -3,939 -9.93 19,883 -1.23 0.0005
2024-02-13 2023-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 39,674 8,811 28.55 20,130 42.83 0.0005
2023-11-13 2023-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 30,863 -77,415 -71.50 14,093 -72.82 0.0004
2023-08-11 2023-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 108,278 88,907 458.97 51,855 484.02 0.0014
2023-05-12 2023-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 19,371 -22,271 -53.48 8,880 -51.84 0.0003
2023-02-13 2022-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 41,642 -388 -0.92 18,439 9.21 0.0006
2022-11-14 2022-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 42,030 -15,456 -26.89 16,883 -28.97 0.0006
2022-08-12 2022-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 57,486 -9,851 -14.63 23,770 -28.03 0.0008
2022-05-12 2022-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 67,337 33,318 97.94 33,026 87.53 0.0009
2022-02-10 2021-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 34,019 3,706 12.23 17,611 20.83 0.0004
2021-11-09 2021-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 30,313 -12,591 -29.35 14,575 -30.81 0.0004
2021-08-11 2021-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 42,904 -16,493 -27.77 21,066 -25.50 0.0006
2021-05-07 2021-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 59,397 26,371 79.85 28,276 103.91 0.0008
2021-02-05 2020-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 33,026 -20,140 -37.88 13,867 -23.03 0.0004
2020-11-06 2020-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 53,166 23,631 80.01 18,015 87.97 0.0007
2020-08-14 2020-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 29,535 -21,516 -42.15 9,584 -28.58 0.0004
2020-05-01 2020-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 51,051 4,750 10.26 13,420 -22.79 0.0007
2020-02-13 2019-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 46,301 -14,647 -24.03 17,381 -19.09 0.0007
2019-11-08 2019-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 60,948 -17,364 -22.17 21,482 -22.64 0.0009
2019-08-22 2019-06-30 13F/A-1 SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 78,312 9,244 13.38 27,769 16.40 0.0012
2019-08-13 2019-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 78,312 9,244 27,769
2019-05-09 2019-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 69,068 1,994 2.97 23,856 17.52 0.0011
2019-02-08 2018-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 67,074 -13,440 -16.69 20,300 -31.39 0.0010
2018-11-09 2018-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 80,514 -309 -0.38 29,586 3.11 0.0013
2018-08-09 2018-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 80,823 30,720 61.31 28,694 67.59 0.0013
2018-05-09 2018-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 50,103 -6,678 -11.76 17,122 -12.70 0.0008
2018-02-09 2017-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 56,781 35,073 161.57 19,612 176.81 0.0009
2017-11-14 2017-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 21,708 -30,720 -58.59 7,085 -57.45 0.0004
2017-08-10 2017-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 52,428 24,240 85.99 16,652 89.10 0.0009
2017-05-12 2017-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 28,188 -9,109 -24.42 8,806 -21.75 0.0005
2017-02-10 2016-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 37,297 -1,541 -3.97 11,253 2.65 0.0159
2016-11-08 2016-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 38,838 699 1.83 10,963 5.59 0.0157
2016-08-10 2016-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 38,139 -4,736 -11.05 10,383 -7.82 0.0156
2016-05-10 2016-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 42,875 16,409 62.00 11,264 67.54 0.0181
2016-02-11 2015-12-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 26,466 -31,304 -54.19 6,723 -53.24 0.0099
2015-11-13 2015-09-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 57,770 8,869 18.14 14,378 7.62 0.0225
2015-08-07 2015-06-30 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 48,901 44,976 1,145.89 13,360 1,127.94 0.0198
2015-05-13 2015-03-31 13F SPDR S&P MIDCAP 400 ETF TR UTSER1 S&PDCRP 78467Y107 3,925 3,925 1,088 0.0015
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.