State Street SPDR S&P 500 ETF Trust
US ˙ ARCA ˙ US78462F1030

SecuritySPY / State Street SPDR S&P 500 ETF Trust
InstitutionBrown Advisory Inc
Latest Disclosed Ownership968,768 shares
Latest Disclosed Value $ 630,028,989
Brown Advisory Inc ownership in SPY / State Street SPDR S&P 500 ETF Trust

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 968,768 shares of State Street SPDR S&P 500 ETF Trust (US:SPY) valued at $630,028,581 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 919,437 shares of State Street SPDR S&P 500 ETF Trust. This represents a change in shares of 5.37% during the quarter. The current value of the position is $733,444,565 USD.

Brown Advisory Inc has a history of taking positions in derivatives of the underlying security (SPY) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

SPY / State Street SPDR S&P 500 ETF Trust Historical Put/Call Ratio
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 STATE STR SPDR S&P 500 ETF T TR UNIT 78462F103 968,768 49,331 5.37 630,029 0.49 1.0353
2026-02-13 2025-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 919,437 170,031 22.69 626,983 25.59 0.8747
2025-11-14 2025-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 749,406 111,513 17.48 499,239 26.67 0.6499
2025-08-13 2025-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 637,893 5,309 0.84 394,122 11.38 0.5188
2025-04-30 2025-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 632,584 19,540 3.19 353,862 -1.51 0.5057
2025-02-14 2024-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 613,044 36,565 6.34 359,293 8.63 0.4557
2024-11-13 2024-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 576,479 -3,664 -0.63 330,760 4.76 0.4153
2024-08-14 2024-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 580,143 59,279 11.38 315,725 15.88 0.4127
2024-04-24 2024-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 520,864 -3,496 -0.67 272,448 9.31 0.3642
2024-02-08 2023-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 524,360 19,812 3.93 249,234 15.55 0.3504
2023-10-25 2023-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 504,548 4,190 0.84 215,684 -2.76 0.3540
2023-07-31 2023-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 500,358 -169,243 -25.28 221,799 -19.09 0.3465
2023-05-08 2023-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 669,601 -46,114 -6.44 274,128 0.15 0.4640
2023-02-13 2022-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 715,715 75,749 11.84 273,711 19.74 0.5084
2022-11-14 2022-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 639,966 48,759 8.25 228,583 2.49 0.4446
2022-11-14 2022-06-30 13F/A-2 SPDR S&P 500 ETF TR TR UNIT 78462F103 591,207 -43,028 -6.78 223,033 -22.14 0.4194
2022-09-13 2022-06-30 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 631,381 -44,405 238,189 0.4119
2022-08-02 2022-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 648,436 -28,819 270,113 0.4340
2022-11-14 2022-03-31 13F/A-2 SPDR S&P 500 ETF TR TR UNIT 78462F103 634,235 -77,457 -10.88 286,445 -15.26 0.4269
2022-09-13 2022-03-31 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 675,786 -35,906 305,212 0.4285
2022-05-09 2022-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 677,255 -34,437 311,959 0.4240
2022-01-27 2021-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 711,692 70,335 10.97 338,026 22.81 0.4189
2021-11-12 2021-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 641,357 -4,746 -0.73 275,233 -0.48 0.4063
2021-07-29 2021-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 646,103 -34,867 -5.12 276,571 2.48 0.4169
2021-05-14 2021-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 680,970 -75,415 -9.97 269,889 -4.56 0.4615
2021-02-12 2020-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 756,385 -28,097 -3.58 282,797 7.64 0.5019
2020-11-16 2020-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 784,482 3,198 0.41 262,714 9.05 0.5427
2020-08-14 2020-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 781,284 6,371 0.82 240,918 20.62 0.5612
2020-05-15 2020-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 774,913 18,591 2.46 199,735 -17.95 0.6119
2020-02-14 2019-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 756,322 10,265 1.38 243,431 9.95 0.6175
2019-11-14 2019-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 746,057 17,143 2.35 221,407 3.67 0.6213
2019-08-12 2019-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 728,914 -142,582 -16.36 213,572 -13.25 0.6111
2019-05-15 2019-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 871,496 242,858 38.63 246,181 56.69 0.6982
2019-02-13 2018-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 628,638 16,587 2.71 157,109 -11.70 0.5278
2018-11-13 2018-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 612,051 -3,391 -0.55 177,935 6.58 0.5063
2018-08-10 2018-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 615,442 13,499 2.24 166,957 5.40 0.5135
2018-06-28 2018-03-31 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 601,943 -77,909 -11.46 158,401 -12.69 0.5120
2018-05-14 2018-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 597,985 -81,867 157,360
2018-02-12 2017-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 679,852 13,385 2.01 181,424 8.35 0.5743
2017-11-13 2017-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 666,467 2,384 0.36 167,437 4.27 0.5552
2017-08-14 2017-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 664,083 -2,539 -0.38 160,576 2.18 0.4908
2017-05-15 2017-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 666,622 -115,014 -14.71 157,150 -10.06 0.5360
2017-02-13 2016-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 781,636 30,808 4.10 174,718 7.58 0.6238
2016-11-14 2016-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 750,828 138,505 22.62 162,404 26.61 0.5582
2016-08-09 2016-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 612,323 7,324 1.21 128,267 3.16 0.4506
2016-05-13 2016-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 604,999 -11,665 -1.89 124,340 -1.10 0.4293
2016-02-08 2015-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 616,664 121,350 24.50 125,720 32.45 0.4265
2015-11-13 2015-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 495,314 326,222 192.93 94,918 172.70 0.3389
2015-08-11 2015-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 169,092 -26,684 -13.63 34,807 -13.87 0.1133
2015-05-14 2015-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 195,776 -3,701 -1.86 40,414 -1.43 0.1287
2015-02-13 2014-12-31 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 199,477 9,085 4.77 41,000 9.30 0.1293
2015-02-09 2014-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 197,477 40,496
2014-11-10 2014-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 190,392 3,427 1.83 37,511 2.51 0.1205
2014-08-08 2014-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 186,965 -26,429 -12.39 36,593 -8.30 0.1151
2014-05-13 2014-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 213,394 31,277 17.17 39,906 18.64 0.1272
2014-02-11 2013-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 182,117 9,228 5.34 33,635 15.80 0.1091
2013-11-08 2013-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 172,889 -20,925 -10.80 29,047 -6.58 0.1037
2013-08-13 2013-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 193,814 193,814 31,092 0.1245
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2019-02-13 2018-12-31 13F SPDR S&P 500 ETF TR TR UNIT Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-13 2018-09-30 13F SPDR S&P 500 ETF TR TR UNIT Put 21,500 -49.41 36 -76.47 n/a n/a n/a
2018-08-10 2018-06-30 13F SPDR S&P 500 ETF TR TR UNIT Put 42,500 0.00 153 -55.91 n/a n/a n/a
2018-06-28 2018-03-31 13F/A SPDR S&P 500 ETF TR TR UNIT Put 42,500 347 n/a n/a n/a
2017-11-13 2017-09-30 13F SPDR S&P 500 ETF TR TR UNIT Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-14 2017-06-30 13F SPDR S&P 500 ETF TR TR UNIT Put 73,900 127.38 267 31.53 n/a n/a n/a
2017-05-15 2017-03-31 13F SPDR S&P 500 ETF TR TR UNIT Put 32,500 203 n/a n/a n/a
2017-02-13 2016-12-31 13F SPDR S&P 500 ETF TR TR UNIT Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-11-14 2016-09-30 13F SPDR S&P 500 ETF TR TR UNIT Put 30,000 76.47 276 165.38 n/a n/a n/a
2016-08-09 2016-06-30 13F SPDR S&P 500 ETF TR TR UNIT Put 17,000 104 n/a n/a n/a
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.