Vanguard Index Funds - Vanguard Mid-Cap ETF
US ˙ ARCA ˙ US9229086296

SecurityVO / Vanguard Index Funds - Vanguard Mid-Cap ETF
InstitutionMadden Advisory Services, Inc.
Latest Disclosed Ownership3,425 shares
Latest Disclosed Value $ 983,538
Madden Advisory Services, Inc. reports 0.47% increase in ownership of VO / Vanguard Index Funds - Vanguard Mid-Cap ETF

On May 11, 2026 - Madden Advisory Services, Inc. filed a 13F-HR form disclosing ownership of 3,425 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF (US:VO) valued at $983,592 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 3,409 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF. This represents a change in shares of 0.47% during the quarter. The current value of the position is $274,616 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 MID CAP ETF 922908629 3,425 16 0.47 984 -0.61 0.3874
2026-02-11 2025-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,409 -99 -2.82 989 -3.98 0.3979
2025-10-24 2025-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,508 -12 -0.34 1,031 4.67 0.3992
2025-07-23 2025-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,520 -17 -0.48 985 7.66 0.4197
2025-05-06 2025-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,537 10 0.28 915 -1.83 0.4264
2025-02-13 2024-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,527 18 0.51 932 0.65 0.4326
2024-10-30 2024-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,509 49 1.42 926 10.51 0.4241
2024-08-07 2024-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,460 0 0.00 838 -3.12 0.4259
2024-05-03 2024-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,460 -95 -2.67 864 4.60 0.4556
2024-02-12 2023-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,555 413 13.14 827 26.30 0.4661
2023-11-13 2023-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,142 615 24.34 654 17.63 0.4138
2023-08-07 2023-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,527 449 21.61 556 26.94 0.3601
2023-04-25 2023-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,078 9 0.43 438 4.04 0.3076
2023-02-14 2022-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,069 113 5.78 422 14.40 0.3154
2022-11-09 2022-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,956 -53 -2.64 368 -7.07 0.2940
2022-07-29 2022-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,009 138 7.38 396 -11.01 0.2998
2022-05-02 2022-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 1,871 44 2.41 445 -4.30 0.3024
2022-04-18 2022-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,871 44 445 0.3081
2022-02-08 2021-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,827 152 9.07 465 17.13 0.3052
2021-11-12 2021-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,675 207 14.10 397 14.08 0.2839
2021-08-10 2021-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,468 -90 -5.78 348 0.87 0.2574
2021-05-04 2021-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,558 0 0.00 345 7.14 0.2701
2021-01-28 2020-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,558 -697 -30.91 322 -18.89 0.2704
2020-10-30 2020-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,255 -60 -2.59 397 4.75 0.3783
2020-08-10 2020-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,315 -115 -4.73 379 18.81 0.3931
2020-05-11 2020-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,430 2,430 319 0.2211
2019-11-01 2019-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 0 -1,405 -100.00 0 -100.00
2019-07-22 2019-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,405 -60 -4.10 234 -0.43 0.1459
2019-04-16 2019-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 235 16.34 0.1259
2019-01-23 2018-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 202 -15.83 0.1220
2018-11-08 2018-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 240 4.35 0.1449
2018-08-07 2018-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 230 2.22 0.1460
2018-05-08 2018-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 225 -0.44 0.1365
2018-02-13 2017-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 226 5.12 0.1365
2017-11-07 2017-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 215 3.37 0.1359
2017-08-11 2017-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 208 2.46 0.1371
2017-05-11 2017-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 1,465 203 0.1310
2016-05-10 2016-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 0 0 0 0.0000
2016-02-10 2015-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 0 -1,465 -100.00 0 -100.00
2015-10-29 2015-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 0 0.00 170 -8.60 0.1115
2015-07-24 2015-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,465 1,465 0.00 186 0.1113
2015-02-03 2014-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 0 -1,430 -100.00 0 -100.00
2014-11-12 2014-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,430 25 1.78 168 0.60 0.0872
2014-08-11 2014-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,405 1,405 167 0.0850
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.