SPDR Series Trust - SPDR Portfolio S&P 500 ETF
US ˙ ARCA ˙ US78464A8541
TEN SYMBOL NIE JEST JUŻ AKTYWNY

SecuritySPLG / SPDR Series Trust - SPDR Portfolio S&P 500 ETF
InstitutionAdvisor OS, LLC
Latest Disclosed Ownership237,345 shares
Latest Disclosed Value $ 18,166,395
Advisor OS, LLC reports 0.96% decrease in ownership of SPLG / SPDR Series Trust - SPDR Portfolio S&P 500 ETF

On May 7, 2026 - Advisor OS, LLC filed a 13F-HR form disclosing ownership of 237,345 shares of SPDR Series Trust - SPDR Portfolio S&P 500 ETF (US:SPLG) valued at $18,166,395 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 239,641 shares of SPDR Series Trust - SPDR Portfolio S&P 500 ETF. This represents a change in shares of -0.96% during the quarter. The current value of the position is $18,987,600 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)
2026-05-07 2026-03-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A854 237,345 -2,296 -0.96 18,166 -5.50 0.5107
2026-02-04 2025-12-31 13F SPDR SERIES TRUST STATE STREET SPD 78464A854 239,641 -7,094 -2.88 19,224 -0.54 0.5677
2025-11-12 2025-09-30 13F SPDR SERIES TRUST PORTFOLIO S&P500 78464A854 246,735 78,873 46.99 19,329 58.42 1.6680
2025-08-14 2025-06-30 13F SPDR SERIES TRUST PORTFOLIO S&P500 78464A854 167,862 29,035 20.91 12,202 33.65 1.2007
2025-05-06 2025-03-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 138,827 -3,615 -2.54 9,129 -7.03 1.0388
2025-02-05 2024-12-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 142,442 -128,778 -47.48 9,820 -46.37 1.1372
2024-11-04 2024-09-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 271,220 21,270 8.51 18,310 14.47 1.8228
2024-08-05 2024-06-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 249,950 36,584 17.15 15,997 21.85 1.7519
2024-05-09 2024-03-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 213,366 49,650 30.33 13,128 43.46 1.5085
2024-02-08 2023-12-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 163,716 -12,571 -7.13 9,152 3.28 1.1910
2023-11-03 2023-09-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 176,287 21,663 14.01 8,860 9.97 1.3280
2023-08-08 2023-06-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 154,624 84,496 120.49 8,057 138.66 1.3183
2023-04-25 2023-03-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 70,128 13,833 24.57 3,377 33.33 0.8105
2023-02-01 2022-12-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 56,295 6,136 12.23 2,532 20.23 0.6724
2022-11-04 2022-09-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 50,159 -19,672 -28.17 2,106 -32.00 0.6349
2022-08-02 2022-06-30 13F SPDR SER TR PORTFOLIO S&P500 78464A854 69,831 -4,690 -6.29 3,097 -21.79 0.9035
2022-05-11 2022-03-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 74,521 21,297 40.01 3,960 33.29 1.1467
2022-02-04 2021-12-31 13F SPDR SER TR PORTFOLIO S&P500 78464A854 53,224 53,224 2,971 0.6061
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.