Middlefield Banc Corp.
US ˙ NasdaqCM ˙ US5963042040
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

SecurityMBCN / Middlefield Banc Corp.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Dimensional Fund Advisors Lp closes position in MBCN / Middlefield Banc Corp.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 0 shares of Middlefield Banc Corp. (US:MBCN) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 84,399 shares of Middlefield Banc Corp.. The current value of the position is $0 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)
2026-05-07 2026-03-31 13F MIDDLEFIELD BANC COM NEW 596304204 0 -100.00 0
2026-02-12 2025-12-31 13F MIDDLEFIELD BANC COM NEW 596304204 84,399 522 0.62 2,915 15.77 0.0006
2025-11-12 2025-09-30 13F MIDDLEFIELD BANC COM NEW 596304204 83,877 -1,200 -1.41 2,517 -1.72 0.0005
2025-08-12 2025-06-30 13F MIDDLEFIELD BANC COM NEW 596304204 85,077 2,516 3.05 2,562 11.06 0.0006
2025-05-13 2025-03-31 13F MIDDLEFIELD BANC COM NEW 596304204 82,561 1,676 2.07 2,307 1.68 0.0006
2025-02-13 2024-12-31 13F MIDDLEFIELD BANC COM NEW 596304204 80,885 1,224 1.54 2,269 -1.13 0.0005
2024-11-07 2024-09-30 13F MIDDLEFIELD BANC COM NEW 596304204 79,661 -339 -0.42 2,294 19.35 0.0006
2024-08-09 2024-06-30 13F MIDDLEFIELD BANC COM NEW 596304204 80,000 -71 -0.09 1,923 0.52 0.0005
2024-05-10 2024-03-31 13F MIDDLEFIELD BANC COM NEW 596304204 80,071 -1,644 -2.01 1,912 -27.71 0.0005
2024-02-07 2023-12-31 13F MIDDLEFIELD BANC COM NEW 596304204 81,715 -903 -1.09 2,646 26.01 0.0008
2023-11-09 2023-09-30 13F MIDDLEFIELD BANC COM NEW 596304204 82,618 -855 -1.02 2,100 -6.17 0.0007
2023-08-09 2023-06-30 13F MIDDLEFIELD BANC COM NEW 596304204 83,473 -1,178 -1.39 2,238 -5.65 0.0007
2023-05-12 2023-03-31 13F MIDDLEFIELD BANC COM NEW 596304204 84,651 -15,169 -15.20 2,371 118,450.00 0.0008
2023-02-09 2022-12-31 13F MIDDLEFIELD BANC COM NEW 596304204 99,820 -1,798 -1.77 3 -99.93 0.0008
2022-11-10 2022-09-30 13F MIDDLEFIELD BANC COM NEW 596304204 101,618 2,714 2.74 2,753 10.43 0.0011
2022-08-12 2022-06-30 13F MIDDLEFIELD BANC COM NEW 596304204 98,904 2,494 2.59 2,493 4.18 0.0009
2022-05-13 2022-03-31 13F MIDDLEFIELD BANC COM 596304204 96,410 463 0.48 2,393 0.50 0.0007
2022-02-09 2021-12-31 13F MIDDLEFIELD BANC COM 596304204 95,947 2,894 3.11 2,381 6.29 0.0007
2021-11-12 2021-09-30 13F MIDDLEFIELD BANC COM 596304204 93,053 1,675 1.83 2,240 3.85 0.0007
2021-08-12 2021-06-30 13F MIDDLEFIELD BANC COM 596304204 91,378 -802 -0.87 2,157 11.65 0.0007
2021-05-14 2021-03-31 13F MIDDLEFIELD BANC COM 596304204 92,180 13,557 17.24 1,932 9.21 0.0006
2021-03-08 2020-12-31 13F/A-2 MIDDLEFIELD BANC COM 596304204 78,623 0 0.00 1,769 16.53 0.0006
2021-02-11 2020-12-31 13F MIDDLEFIELD BANC COM 596304204 78,623 0 1,769 638.8688
2020-11-12 2020-09-30 13F MIDDLEFIELD BANC COM 596304204 78,623 193 0.25 1,518 -6.70 0.0006
2020-08-13 2020-06-30 13F MIDDLEFIELD BANC COM 596304204 78,430 4,138 5.57 1,627 38.59 0.0007
2020-05-14 2020-03-31 13F MIDDLEFIELD BANC COM 596304204 74,292 900 1.23 1,174 -38.69 0.0006
2020-02-14 2019-12-31 13F MIDDLEFIELD BANC COM 596304204 73,392 36,696 100.00 1,915 11.40 0.0007
2019-11-12 2019-09-30 13F MIDDLEFIELD BANC COM 596304204 36,696 722 2.01 1,719 16.62 0.0007
2019-08-13 2019-06-30 13F MIDDLEFIELD BANC COM 596304204 35,974 1,686 4.92 1,474 4.32 0.0006
2019-08-12 2019-03-31 13F/A-2 MIDDLEFIELD BANC COM 596304204 34,288 2,073 6.43 1,413 3.37 0.0006
2019-05-10 2019-03-31 13F MIDDLEFIELD BANC COM 596304204 34,288 2,073 1,413
2019-02-26 2018-12-31 13F/A-1 MIDDLEFIELD BANC COM 596304204 32,215 4,029 14.29 1,367 2.94 0.0006
2019-02-13 2018-12-31 13F MIDDLEFIELD BANC COM 596304204 32,215 4,029 1,367
2018-11-13 2018-09-30 13F MIDDLEFIELD BANC COM 596304204 28,186 3,862 15.88 1,328 7.70 0.0005
2018-08-10 2018-06-30 13F MIDDLEFIELD BANC COM 596304204 24,324 16,788 222.77 1,233 233.24 0.0005
2018-05-11 2018-03-31 13F MIDDLEFIELD BANC COM 596304204 7,536 7,536 370 0.0002
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.