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

SecurityVO / Vanguard Index Funds - Vanguard Mid-Cap ETF
InstitutionAssociated Banc-corp
Latest Disclosed Ownership253,498 shares
Latest Disclosed Value $ 72,799,555
Associated Banc-corp reports 8.01% increase in ownership of VO / Vanguard Index Funds - Vanguard Mid-Cap ETF

On May 1, 2026 - Associated Banc-corp filed a 13F-HR form disclosing ownership of 253,498 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF (US:VO) valued at $72,799,556 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 234,703 shares of Vanguard Index Funds - Vanguard Mid-Cap ETF. This represents a change in shares of 8.01% during the quarter. The current value of the position is $20,165,766 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)
2026-05-01 2026-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 253,498 18,795 8.01 72,800 6.88 1.9275
2026-02-06 2025-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 234,703 49,731 26.89 68,116 25.37 1.7437
2025-10-24 2025-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 184,972 11,978 6.92 54,334 12.24 1.4300
2025-08-12 2025-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 172,994 12,807 8.00 48,409 16.85 1.3721
2025-05-09 2025-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 160,187 18,672 13.19 41,428 10.83 1.2631
2025-02-10 2024-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 141,515 10,479 8.00 37,378 8.12 1.1260
2024-11-13 2024-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 131,036 7,495 6.07 34,571 15.59 1.0162
2024-08-01 2024-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 123,541 7,059 6.06 29,909 2.77 0.9302
2024-05-09 2024-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 116,482 -509 -0.44 29,104 6.94 0.9225
2024-02-09 2023-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 116,991 6,341 5.73 27,217 18.12 0.9455
2023-11-09 2023-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 110,650 7,236 7.00 23,042 1.20 0.8919
2023-08-07 2023-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 103,414 3,829 3.84 22,768 8.39 0.8604
2023-05-09 2023-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 99,585 4,481 4.71 21,004 8.36 0.8438
2023-02-10 2022-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 95,104 2,312 2.49 19,383 11.12 0.8066
2022-11-09 2022-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 92,792 4,662 5.29 17,443 0.48 0.8060
2022-08-10 2022-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 88,130 6,092 7.43 17,359 -11.03 0.7600
2022-05-11 2022-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 82,038 2,047 2.56 19,512 -4.26 0.7514
2022-02-10 2021-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 79,991 2,467 3.18 20,380 11.03 0.7472
2021-11-08 2021-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 77,524 3,493 4.72 18,355 4.46 0.7253
2021-08-11 2021-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 74,031 13,358 22.02 17,571 119.97 0.6952
2021-05-05 2021-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 60,673 -4,016 -6.21 7,988 -40.28 0.4966
2021-02-11 2020-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 64,689 201 0.31 13,376 17.67 0.5220
2020-11-12 2020-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 64,488 2,598 4.20 11,367 12.06 0.4890
2020-08-14 2020-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 61,890 1,217 2.01 10,144 26.99 0.4578
2020-05-14 2020-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 60,673 26,190 75.95 7,988 30.01 0.4257
2020-02-12 2019-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 34,483 4,367 14.50 6,144 21.74 0.3060
2019-11-14 2019-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 30,116 5,985 24.80 5,047 25.14 0.2714
2019-08-06 2019-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 24,131 8,915 58.59 4,033 64.88 0.2211
2019-05-07 2019-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 15,216 4,456 41.41 2,446 64.49 0.1410
2019-02-13 2018-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 10,760 543 5.31 1,487 -11.38 0.0969
2018-11-07 2018-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 10,217 1,034 11.26 1,678 15.88 0.0931
2018-08-07 2018-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 9,183 -151 -1.62 1,448 0.63 0.0847
2018-05-07 2018-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 9,334 -200 -2.10 1,439 -2.51 0.0818
2018-02-07 2017-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 9,534 -232 -2.38 1,476 2.79 0.0796
2017-11-13 2017-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 9,766 333 3.53 1,436 6.85 0.0792
2017-08-10 2017-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 9,433 831 9.66 1,344 12.19 0.0762
2017-05-12 2017-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,602 62 0.73 1,198 6.58 0.0713
2017-02-10 2016-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 8,540 1,230 16.83 1,124 18.82 0.0702
2016-11-10 2016-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 7,310 2,126 41.01 946 47.58 0.0602
2016-08-11 2016-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,184 50 0.97 641 3.05 0.0412
2016-05-12 2016-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,134 342 7.14 622 7.99 0.0409
2016-02-12 2015-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,792 35 0.74 576 3.78 0.0380
2015-11-10 2015-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,757 5 0.11 555 -8.42 0.0387
2015-08-11 2015-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,752 215 4.74 606 0.66 0.0389
2015-05-12 2015-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,537 603 15.33 602 23.87 0.0380
2015-02-12 2014-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 3,934 -505 -11.38 486 -6.72 0.0307
2014-11-05 2014-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 4,439 -1,251 -21.99 521 -22.81 0.0342
2014-08-13 2014-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,690 -580 -9.25 675 -5.20 0.0439
2014-05-13 2014-03-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,270 128 2.08 712 5.33 0.0491
2014-02-14 2013-12-31 13F VANGUARD INDEX FDS MID CAP ETF 922908629 6,142 636 11.55 676 19.86 0.0485
2013-11-14 2013-09-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 5,506 2,922 113.08 564 129.27 0.0448
2013-08-13 2013-06-30 13F VANGUARD INDEX FDS MID CAP ETF 922908629 2,584 2,584 246 0.0202
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.