뱅가드 인덱스 펀드 - Vanguard S&P 500 ETF
US ˙ ARCA ˙ US9229083632

SecurityVOO / Vanguard Index Funds - Vanguard S&P 500 ETF
InstitutionMadden Advisory Services, Inc.
Latest Disclosed Ownership32,689 shares
Latest Disclosed Value $ 19,533,482
Madden Advisory Services, Inc. reports 2.81% increase in ownership of VOO / Vanguard Index Funds - Vanguard S&P 500 ETF

On May 11, 2026 - Madden Advisory Services, Inc. filed a 13F-HR form disclosing ownership of 32,689 shares of Vanguard Index Funds - Vanguard S&P 500 ETF (US:VOO) valued at $19,533,312 USD as of March 31, 2026. The current value of the position is $22,163,142 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)
2026-05-11 2026-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 32,689 893 2.81 19,533 -2.04 7.6947
2026-02-11 2025-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 31,796 -610 -1.88 19,940 0.48 8.0192
2025-10-24 2025-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 32,406 935 2.97 19,845 11.01 7.6855
2025-07-23 2025-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 31,471 685 2.23 17,877 12.99 7.6182
2025-05-06 2025-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 30,786 147 0.48 15,822 -4.16 7.3737
2025-02-13 2024-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 30,639 731 2.44 16,509 4.61 7.6642
2024-10-30 2024-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 29,908 789 2.71 15,782 8.36 7.2275
2024-08-07 2024-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 29,119 1,160 4.15 14,563 8.36 7.4046
2024-05-03 2024-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 27,959 -315 -1.11 13,440 8.83 7.0828
2024-02-12 2023-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 28,274 104 0.37 12,350 11.64 6.9601
2023-11-13 2023-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 28,170 568 2.06 11,062 -1.59 6.9975
2023-08-07 2023-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 27,602 989 3.72 11,242 12.32 7.2758
2023-04-25 2023-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 26,613 680 2.62 10,008 9.85 7.0249
2023-02-14 2022-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,933 756 3.00 9,111 10.22 6.8158
2022-11-09 2022-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,177 -103 -0.41 8,266 -5.74 6.6045
2022-07-29 2022-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,280 -210 -0.82 8,769 -17.14 6.6397
2022-05-02 2022-03-31 13F/A-1 VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,490 614 2.47 10,583 -2.55 7.1908
2022-04-18 2022-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,490 614 10,583 7.3283
2022-02-08 2021-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 24,876 637 2.63 10,860 13.60 7.1288
2021-11-12 2021-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 24,239 -279 -1.14 9,560 -0.91 6.8369
2021-08-10 2021-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 24,518 -535 -2.14 9,648 5.71 7.1351
2021-05-04 2021-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 25,053 1,920 8.30 9,127 14.79 7.1448
2021-01-28 2020-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 23,133 3,030 15.07 7,951 28.57 6.6764
2020-10-30 2020-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 20,103 493 2.51 6,184 11.26 5.8931
2020-08-10 2020-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 19,610 -8,092 -29.21 5,558 -15.27 5.7644
2020-05-11 2020-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 27,702 22,540 436.65 6,560 329.88 4.5477
2020-01-27 2019-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 5,162 1,046 25.41 1,526 36.01 0.9981
2019-11-01 2019-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,116 -417 -9.20 1,122 -8.03 0.7994
2019-07-22 2019-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,533 -296 -6.13 1,220 -2.63 0.7609
2019-04-16 2019-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,829 214 4.64 1,253 18.21 0.6714
2019-01-23 2018-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,615 63 1.38 1,060 -12.76 0.6401
2018-11-08 2018-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,552 503 12.42 1,215 20.30 0.7335
2018-08-07 2018-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,049 317 8.49 1,010 11.85 0.6413
2018-05-08 2018-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 3,732 356 10.55 903 9.06 0.5477
2018-02-13 2017-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 3,376 504 17.55 828 25.08 0.5000
2017-11-07 2017-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 2,872 256 9.79 662 14.14 0.4186
2017-08-11 2017-06-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 2,616 763 41.18 580 45.00 0.3822
2017-05-11 2017-03-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 1,853 610 49.07 400 56.86 0.2581
2017-01-20 2016-12-31 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 1,243 -2,989 -70.63 255 -69.64 0.1728
2016-11-09 2016-09-30 13F VANGUARD INDEX FDS S&P 500 ETF SHS 922908363 4,232 4,232 840 0.5160
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.