SPDR Series Trust - State Street SPDR S&P 400 TM Mid Cap Growth ETF
US ˙ ARCA ˙ US78464A8210

SecurityMDYG / SPDR Series Trust - State Street SPDR S&P 400 TM Mid Cap Growth ETF
InstitutionWiley Bros.-aintree Capital, Llc
Latest Disclosed Ownership17,999 shares
Latest Disclosed Value $ 1,727,225
Wiley Bros.-aintree Capital, Llc reports 11.53% increase in ownership of MDYG / SPDR Series Trust - State Street SPDR S&P 400 TM Mid Cap Growth ETF

On May 15, 2026 - Wiley Bros.-aintree Capital, Llc filed a 13F-HR form disclosing ownership of 17,999 shares of SPDR Series Trust - State Street SPDR S&P 400 TM Mid Cap Growth ETF (US:MDYG) valued at $1,727,184 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 16,138 shares of SPDR Series Trust - State Street SPDR S&P 400 TM Mid Cap Growth ETF. This represents a change in shares of 11.53% during the quarter. The current value of the position is $1,978,990 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 78464A821 17,999 1,861 11.53 1,727 15.83 0.0085
2026-02-17 2025-12-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A821 16,138 10,602 191.51 1,492 194.66 0.0078
2025-11-14 2025-09-30 13F SPDR SERIES TRUST S&P 400 MDCP GRW 78464A821 5,536 3,010 119.16 507 131.05 0.0032
2025-08-14 2025-06-30 13F SPDR SERIES TRUST S&P 400 MDCP GRW 78464A821 2,526 -1,864 -42.46 219 -37.07 0.0017
2025-05-15 2025-03-31 13F SPDR SER TR S&P 400 MDCP GRW 78464A821 4,390 -2,387 -35.22 349 -41.71 0.0037
2025-02-14 2024-12-31 13F SPDR SER TR S&P 400 MDCP GRW 78464A821 6,777 2,343 52.84 597 53.47 0.0072
2024-11-14 2024-09-30 13F SPDR SER TR S&P 400 MDCP GRW 78464A821 4,434 4,434 389 0.0075
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.