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

SecurityVO / Vanguard Index Funds - Vanguard Mid-Cap ETF
InstitutionMorgan Stanley
Latest Disclosed Ownership8,634,521 shares
Latest Disclosed Value $ 2,479,662,222
Morgan Stanley reports 1.65% increase in ownership of VO / Vanguard Index Funds - Vanguard Mid-Cap ETF

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 8,634,521 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF (US:VO) valued at $2,479,661,741 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 8,494,623 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF. This represents a change in shares of 1.65% during the quarter. The current value of the position is $692,315,894 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)
2026-05-15 2026-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,634,521 139,898 1.65 2,479,662 0.58 0.1494
2026-05-27 2025-12-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 8,494,623 264,421 3.21 2,465,310 1.98 0.1472
2026-02-13 2025-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,494,623 264,421 2,465,310
2026-05-27 2025-09-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 8,230,202 188,759 2.35 2,417,540 7.43 0.1464
2025-11-14 2025-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,230,202 188,759 2,417,540 0.1464
2025-08-15 2025-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,041,443 9,936 0.12 2,250,237 8.34 0.1466
2025-05-15 2025-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,031,507 357,679 4.66 2,077,109 2.48 0.1485
2025-05-15 2024-12-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 7,673,828 302,028 4.10 2,026,889 4.22 0.1420
2025-02-14 2024-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,673,828 302,028 2,026,889 0.1420
2025-05-14 2024-09-30 13F/A-2 VANGUARD INDEX FDS MID CAP ETF 922908629 7,371,800 64,662 0.88 1,944,903 9.94 0.1410
2025-02-14 2024-09-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 7,371,800 64,662 1,944,903 0.1410
2024-11-14 2024-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,371,800 64,662 1,944,903 0.0167
2025-05-14 2024-06-30 13F/A-2 VANGUARD INDEX FDS MID CAP ETF 922908629 7,307,138 105,922 1.47 1,769,059 -1.68 0.1369
2024-10-17 2024-06-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 7,307,138 105,922 1,769,059 0.1369
2024-08-14 2024-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,307,138 105,922 1,769,059 0.1369
2024-10-17 2024-03-31 13F/A-2 VANGUARD INDEX FDS MID CAP ETF 922908629 7,201,216 165,331 2.35 1,799,296 9.93 0.1444
2024-08-16 2024-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 7,201,216 165,331 1,799,296 0.0169
2024-05-15 2024-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,201,216 165,331 1,799,296 0.1444
2024-08-16 2023-12-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 7,035,885 372,359 5.59 1,636,829 17.96 0.1442
2024-02-13 2023-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,035,885 372,359 1,636,829 0.1442
2023-11-15 2023-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,663,526 132,306 2.03 1,387,613 -3.50 0.1411
2023-08-14 2023-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,531,220 227,026 3.60 1,437,914 8.14 0.1417
2023-05-15 2023-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,304,194 -511,959 -7.51 1,329,681 -4.28 0.1426
2023-02-14 2022-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,816,153 517,671 8.22 1,389,201 17.33 0.1578
2022-11-14 2022-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,298,482 -23,579 -0.37 1,183,988 -4.92 0.1614
2022-10-27 2022-06-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 6,322,061 321,551 5.36 1,245,257 -12.75 0.1616
2022-08-15 2022-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,322,061 321,551 1,245,257 0.0326
2022-10-27 2022-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 6,000,510 61,300 1.03 1,427,162 -5.68 0.1925
2022-05-13 2022-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,000,510 61,300 1,427,162 0.1925
2022-02-14 2021-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,939,210 88,314 1.51 1,513,132 9.23 0.1868
2021-11-15 2021-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,850,896 180,339 3.18 1,385,258 2.92 0.1866
2021-08-23 2021-06-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 5,670,557 27,996 0.50 1,345,908 7.77 0.1775
2021-08-16 2021-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,670,557 27,996 1,345,908 0.0369
2021-05-17 2021-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,642,561 141,226 2.57 1,248,925 9.79 0.1835
2021-02-16 2020-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,501,335 263,365 5.03 1,137,511 23.21 0.1757
2020-11-13 2020-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,237,970 23,424 0.45 923,245 8.02 0.1786
2020-08-14 2020-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,214,546 54,319 1.05 854,717 25.81 0.1892
2020-05-26 2020-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 5,160,227 1,053,856 25.66 679,345 -7.15 0.1846
2020-05-15 2020-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,160,227 1,053,856 679,345 52,187.8579
2020-02-14 2019-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,106,371 229,357 5.92 731,673 12.60 0.1702
2019-11-14 2019-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,877,014 -38,493 -0.98 649,787 -0.72 0.1720
2019-08-14 2019-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,915,507 -135,109 -3.34 654,516 0.52 0.1742
2019-05-15 2019-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,050,616 -30,546 -0.75 651,137 15.46 0.1843
2019-02-14 2018-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,081,162 13,018 0.32 563,935 -15.57 0.1688
2019-04-23 2018-09-30 13F/A-2 VANGUARD INDEX FDS MID CAP ETF 922908629 4,068,144 93,188 2.34 667,948 6.60 0.1672
2018-11-20 2018-09-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 4,068,144 0 667,948 0.1672
2018-11-14 2018-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,068,144 93,188 667,948
2019-04-23 2018-06-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,974,956 258,868 6.97 626,613 9.35 0.1693
2018-08-14 2018-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,974,956 258,868 626,613
2019-04-23 2018-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,716,088 50,029 1.36 573,058 0.99 0.1591
2018-05-14 2018-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,716,088 50,029 573,058
2019-04-23 2017-12-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,666,059 -319,158 -8.01 567,432 -3.14 0.1553
2018-02-14 2017-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,666,059 -319,158 567,432
2017-11-14 2017-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,985,217 166,251 4.35 585,828 7.63 0.1755
2017-08-11 2017-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,818,966 178,838 4.91 544,279 7.38 0.1644
2017-05-22 2017-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,640,128 228,269 6.69 506,852 12.86 0.1558
2017-05-12 2017-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,640,128 506,852
2017-02-22 2016-12-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,411,859 446,828 15.07 449,103 17.02 0.1470
2017-02-13 2016-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,411,859 449,103
2016-11-10 2016-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,965,031 -58,786 -1.94 383,795 2.66 0.1311
2016-08-12 2016-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,023,817 -60,751 -1.97 373,835 -0.03 0.1350
2016-05-12 2016-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,084,568 -642,956 -17.25 373,943 -16.48 0.1439
2016-02-09 2015-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,727,524 543,592 17.07 447,713 20.52 0.1621
2016-02-08 2015-09-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 3,183,932 118,558 3.87 371,469 -4.90 0.1373
2015-11-09 2015-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,183,932 371,469
2015-08-12 2015-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,065,374 230,065 8.11 390,620 3.82 0.1354
2015-05-14 2015-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,835,309 458,622 19.30 376,246 28.12 0.1386
2015-02-13 2014-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,376,687 513,733 27.58 293,664 34.37 0.1074
2014-12-16 2014-09-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 1,862,954 89,347 5.04 218,542 8.49 0.0840
2014-11-14 2014-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,862,954 218,542
2014-05-13 2014-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,773,607 12,853 0.73 201,446 3.99 0.0844
2014-02-13 2013-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 1,760,754 154,048 9.59 193,718 17.65 0.0824
2013-11-13 2013-09-30 13F VANGUARD MID-CAP ETF COM 922908629 1,606,706 247,926 18.25 164,657 27.37 0.0778
2013-08-08 2013-06-30 13F VANGUARD MID-CAP ETF COM 922908629 1,358,780 1,358,780 129,274 0.0652
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.