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

SecuritySPY / State Street SPDR S&P 500 ETF Trust
InstitutionMairs & Power Inc
Latest Disclosed Ownership27,180 shares
Latest Disclosed Value $ 17,676,384
Mairs & Power Inc reports 0.47% increase in ownership of SPY / State Street SPDR S&P 500 ETF Trust

On May 13, 2026 - Mairs & Power Inc filed a 13F-HR form disclosing ownership of 27,180 shares of State Street SPDR S&P 500 ETF Trust (US:SPY) valued at $17,676,241 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 27,054 shares of State Street SPDR S&P 500 ETF Trust. This represents a change in shares of 0.47% during the quarter. The current value of the position is $20,043,076 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.

Upgrade to unlock premium data and export to Excel .

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 500 ETF T TR UNIT 78462F103 27,180 126 0.47 17,676 -4.18 0.1806
2026-02-17 2025-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 27,054 61 0.23 18,449 2.59 0.1776
2025-11-14 2025-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 26,993 -797 -2.87 17,982 4.73 0.1690
2025-08-14 2025-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 27,790 18,846 210.71 17,170 243.19 0.1695
2025-05-15 2025-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 8,944 -72 -0.80 5,003 -5.32 0.0521
2025-02-14 2024-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 9,016 -372 -3.96 5,284 -1.89 0.0511
2024-11-14 2024-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 9,388 495 5.57 5,387 11.30 0.0507
2024-08-14 2024-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 8,893 3,362 60.78 4,840 67.27 0.0468
2024-05-15 2024-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 5,531 -14,987 -73.04 2,893 -70.33 0.0280
2024-02-14 2023-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 20,518 10,265 100.12 9,752 122.55 0.1028
2023-11-14 2023-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 10,253 -5,040 -32.96 4,383 -35.36 0.0514
2023-08-14 2023-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 15,293 1,957 14.67 6,779 24.18 0.0737
2023-05-15 2023-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 13,336 -53,327 -79.99 5,460 -78.59 0.0630
2023-02-14 2022-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 66,663 49,596 290.60 25,494 318.19 0.3069
2022-11-14 2022-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 17,067 -6,802 -28.50 6,096 -32.30 0.0769
2022-08-15 2022-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 23,869 -11,120 -31.78 9,005 -43.01 0.1079
2022-05-16 2022-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 34,989 268 0.77 15,802 -4.18 0.1592
2022-02-14 2021-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 34,721 19,878 133.92 16,491 158.89 0.1527
2021-11-15 2021-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 14,843 4,982 50.52 6,370 50.91 0.0637
2021-08-16 2021-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 9,861 835 9.25 4,221 18.00 0.0417
2021-05-14 2021-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 9,026 1,090 13.73 3,577 20.56 0.0376
2021-02-16 2020-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 7,936 -3,646 -31.48 2,967 -23.51 0.0330
2020-11-16 2020-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 11,582 -2,732 -19.09 3,879 -12.12 0.0484
2020-08-14 2020-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 14,314 50 0.35 4,414 20.04 0.0577
2020-05-15 2020-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 14,264 -21,834 -60.49 3,677 -68.35 0.0537
2020-02-14 2019-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 36,098 20,318 128.76 11,619 148.11 0.1320
2019-11-14 2019-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 15,780 -481 -2.96 4,683 -1.70 0.0566
2019-08-14 2019-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 16,261 -6,396 -28.23 4,764 -25.56 0.0572
2019-05-15 2019-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 22,657 -48,974 -68.37 6,400 -64.25 0.0777
2019-02-14 2018-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 71,631 52,095 266.66 17,902 215.18 0.2415
2018-11-14 2018-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 19,536 -12,891 -39.75 5,680 -35.43 0.0661
2018-08-14 2018-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 32,427 -13,270 -29.04 8,797 -26.84 0.1091
2018-05-15 2018-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 45,697 7,027 18.17 12,025 16.53 0.1484
2018-02-14 2017-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 38,670 8,950 30.11 10,319 38.19 0.1196
2017-11-14 2017-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 29,720 2,622 9.68 7,467 13.97 0.0896
2017-08-14 2017-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 27,098 1,098 4.22 6,552 6.90 0.0792
2017-05-15 2017-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 26,000 5,311 25.67 6,129 32.52 0.0751
2017-02-14 2016-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 20,689 3,220 18.43 4,625 22.39 0.0594
2016-11-14 2016-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 17,469 -13,603 -43.78 3,779 -41.94 0.0498
2016-08-15 2016-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 31,072 -3,206 -9.35 6,509 -7.61 0.0879
2016-05-16 2016-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 34,278 1,171 3.54 7,045 4.37 0.1001
2016-02-16 2015-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 33,107 22,457 210.86 6,750 230.72 0.1012
2015-11-16 2015-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 10,650 -4,241 -28.48 2,041 -33.41 0.0319
2015-08-14 2015-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 14,891 -4,755 -24.20 3,065 -24.43 0.0434
2015-05-15 2015-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 19,646 -10,205 -34.19 4,056 -33.90 0.0558
2015-02-17 2014-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 29,851 3,440 13.02 6,136 17.93 0.0851
2014-11-14 2014-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 26,411 -3,140 -10.63 5,203 -10.04 0.0759
2014-08-14 2014-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 29,551 2,690 10.01 5,784 15.15 0.0820
2014-05-15 2014-03-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 26,861 -632 -2.30 5,023 -1.08 0.0744
2014-02-14 2013-12-31 13F SPDR S&P 500 ETF Trust ETF 78462F103 27,493 -4,722 -14.66 5,078 -6.17 0.0781
2013-11-14 2013-09-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 32,215 5,195 19.23 5,412 24.84 0.0935
2013-08-14 2013-06-30 13F SPDR S&P 500 ETF Trust ETF 78462F103 27,020 27,020 4,335 0.0829
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.