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

SecurityVO / Vanguard Index Funds - Vanguard Mid-Cap ETF
InstitutionUBS Group AG
Latest Disclosed Ownership13,399,066 shares
Latest Disclosed Value $ 3,847,943,775
UBS Group AG ownership in VO / Vanguard Index Funds - Vanguard Mid-Cap ETF

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 13,399,066 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF (US:VO) valued at $3,847,943,774 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 5,568,409 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF. This represents a change in shares of 140.63% during the quarter. The current value of the position is $1,074,337,112 USD.

UBS Group AG has a history of taking positions in derivatives of the underlying security (VO) 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.

VO / Vanguard Index Funds - Vanguard Mid-Cap ETF 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)
2026-05-05 2026-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 13,399,066 7,830,657 140.63 3,847,944 138.11 0.1078
2026-01-29 2025-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,568,409 32,208 0.58 1,616,064 -0.62 0.0470
2025-11-13 2025-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,536,201 -139,582 -2.46 1,626,204 2.39 0.2547
2025-08-14 2025-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,675,783 51,750 0.92 1,588,254 9.20 0.2750
2025-05-13 2025-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,624,033 61,378 1.10 1,454,487 -1.01 0.2674
2025-02-14 2024-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,562,655 67,613 1.23 1,469,264 1.35 0.2715
2024-11-14 2024-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,495,042 28,699 0.53 1,449,757 9.55 0.3158
2024-08-14 2024-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,466,343 -319,901 -5.53 1,323,402 -8.46 0.3269
2024-05-13 2024-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,786,244 -75,981 -1.30 1,445,751 6.01 0.3601
2024-02-09 2023-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,862,225 -31,390 -0.53 1,363,788 11.12 0.4082
2023-11-09 2023-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,893,615 106,353 1.84 1,227,286 -3.68 0.4231
2023-08-11 2023-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,787,262 -101,891 -1.73 1,274,124 2.57 0.4302
2023-05-12 2023-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,889,153 -59,738 -1.00 1,242,140 2.45 0.4539
2023-02-08 2022-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,948,891 -175,854 -2.87 1,212,443 5.31 0.4527
2022-11-10 2022-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,124,745 -53,934 -0.87 1,151,329 -5.40 0.5048
2022-08-10 2022-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,178,679 -166,653 -2.63 1,217,015 -19.36 0.4997
2022-05-16 2022-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,345,332 68,982 1.10 1,509,174 -5.62 0.5031
2022-02-14 2021-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,276,350 91,166 1.47 1,599,026 9.19 0.4580
2021-11-15 2021-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,185,184 -18,406 -0.30 1,464,404 -0.54 0.4611
2021-08-13 2021-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,203,590 94,734 1.55 1,472,422 8.90 0.4747
2021-05-12 2021-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,108,856 249,569 4.26 1,352,134 11.61 0.4487
2021-02-11 2020-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,859,287 -6,604,946 -52.99 1,211,525 -44.85 0.4096
2020-11-12 2020-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 12,464,233 213,469 1.74 2,196,946 9.41 0.8281
2020-07-31 2020-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 12,250,764 3,337,164 37.44 2,008,023 71.12 0.8479
2020-05-01 2020-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,913,600 175,752 2.01 1,173,475 -24.63 0.5530
2020-02-14 2019-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,737,848 255,447 3.01 1,556,910 9.51 0.5417
2019-11-14 2019-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,482,401 -77,371 -0.90 1,421,651 -0.64 0.5473
2019-08-14 2019-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,559,772 112,521 1.33 1,430,852 5.37 0.5511
2019-05-14 2019-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,447,251 123,600 1.48 1,357,896 18.06 0.5610
2019-02-14 2018-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,323,651 242,401 3.00 1,150,162 -13.32 0.5216
2018-11-14 2018-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,081,250 144,738 1.82 1,326,860 6.05 0.5259
2018-08-14 2018-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,936,512 331,620 4.36 1,251,111 6.68 0.5418
2018-05-15 2018-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,604,892 458,771 6.42 1,172,750 6.03 0.5063
2018-02-14 2017-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,146,121 419,026 6.23 1,106,077 11.85 0.4545
2017-11-14 2017-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,727,095 1,051,628 18.53 988,883 22.26 0.4574
2017-11-14 2017-06-30 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 5,675,467 300,990 5.60 808,868 8.09 0.4186
2017-08-14 2017-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,675,467 300,990 808,868
2017-11-14 2017-03-31 13F/A-1 VANGUARD INDEX FDS MID CAP ETF 922908629 5,374,477 152,546 2.92 748,342 8.87 0.4084
2017-05-12 2017-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,374,477 152,546 748,342
2017-02-14 2016-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,221,931 413,924 8.61 687,363 10.45 0.3796
2016-11-14 2016-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,808,007 409,391 9.31 622,348 14.44 0.3710
2016-08-12 2016-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,398,616 464,663 11.81 543,801 14.03 0.3416
2016-05-12 2016-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,933,953 318,034 8.80 476,913 9.81 0.3194
2016-02-16 2015-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,615,919 485,293 15.50 434,308 18.91 0.2819
2015-11-13 2015-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,130,626 233,760 8.07 365,250 -1.06 0.2586
2015-08-14 2015-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,896,866 216,554 8.08 369,148 3.79 0.2454
2015-05-14 2015-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,680,312 448,145 20.08 355,677 28.96 0.2456
2015-02-17 2014-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,232,167 2,232,167 275,807 0.1928
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
(%)
2021-05-12 2021-03-31 13F VANGUARD INDEX FDS MID CAP ETF Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F VANGUARD INDEX FDS MID CAP ETF Put 100 0.00 21 16.67 n/a n/a n/a
2020-11-12 2020-09-30 13F VANGUARD INDEX FDS MID CAP ETF Put 100 18 n/a n/a n/a
2018-05-15 2018-03-31 13F VANGUARD INDEX FDS MID CAP ETF Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-14 2017-12-31 13F VANGUARD INDEX FDS MID CAP ETF Put 100 0.00 15 0.00 n/a n/a n/a
2017-11-14 2017-09-30 13F VANGUARD INDEX FDS MID CAP ETF Put 100 15 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.