United Security Bancshares
BU SEMBOL ARTIK AKTİF DEĞİL

SecurityUBFO / United Security Bancshares
InstitutionBlackRock, Inc.
Latest Disclosed Ownership649,837 shares
Latest Disclosed Value $ 6,829,786
BlackRock, Inc. reports 5.36% increase in ownership of UBFO / United Security Bancshares

On May 13, 2026 - BlackRock, Inc. filed a 13F-HR form disclosing ownership of 649,837 shares of United Security Bancshares (US:UBFO) valued at $6,829,787 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 616,799 shares of United Security Bancshares. This represents a change in shares of 5.36% during the quarter. The current value of the position is $6,829,787 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)
2026-05-13 2026-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 649,837 33,038 5.36 6,830 9.95 0.0000
2026-02-12 2025-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 616,799 104,694 20.44 6,211 30.02 0.0001
2025-11-12 2025-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 512,105 -3,426 -0.66 4,778 7.13 0.0001
2025-08-12 2025-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 515,531 366,961 247.00 4,459 235.01 0.0001
2025-05-02 2025-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 148,570 1,619 1.10 1,331 -10.31 0.0000
2025-02-07 2024-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 146,951 25,337 20.83 1,484 40.13 0.0000
2024-11-13 2024-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 121,614 3,810 3.23 1,059 24.00 0.0000
2024-08-13 2024-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 117,804 757 0.65 854 -5.32 0.0000
2024-05-10 2024-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 117,047 15,285 15.02 902 5.50 0.0000
2024-02-13 2023-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 101,762 -648 -0.63 856 12.35 0.0000
2023-11-13 2023-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 102,410 3,378 3.41 762 15.48 0.0000
2023-08-11 2023-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 99,032 37,130 59.98 660 67.26 0.0000
2023-05-12 2023-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 61,902 17,736 40.16 395 22.36 0.0000
2023-02-13 2022-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 44,166 722 1.66 323 13.38 0.0000
2022-11-14 2022-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 43,444 -12,835 -22.81 284 -33.64 0.0000
2022-08-12 2022-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 56,279 -2,643 -4.49 428 -12.47 0.0000
2022-05-12 2022-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 58,922 -6,882 -10.46 489 -8.43 0.0000
2022-02-10 2021-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 65,804 -7,909 -10.73 534 -9.34 0.0000
2021-11-09 2021-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 73,713 -25,342 -25.58 589 -27.19 0.0000
2021-08-11 2021-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 99,055 -858,878 -89.66 809 -89.69 0.0000
2021-05-07 2021-03-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 957,933 146,582 18.07 7,846 37.17 0.0002
2021-02-05 2020-12-31 13F UNITED SEC BANCSHARES CALIF COM 911460103 811,351 57,046 7.56 5,720 24.08 0.0002
2020-11-06 2020-09-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 754,305 -35,782 -4.53 4,610 -12.80 0.0002
2020-08-14 2020-06-30 13F UNITED SEC BANCSHARES CALIF COM 911460103 790,087 38,252 5.09 5,287 9.85 0.0002
2020-05-01 2020-03-31 13F UNITED SECURITY BANCSHARES C COM 911460103 751,835 27,146 3.75 4,813 -38.10 0.0002
2020-02-13 2019-12-31 13F UNITED SECURITY BANCSHARES C COM 911460103 724,689 13,610 1.91 7,775 3.94 0.0003
2019-11-08 2019-09-30 13F UNITED SECURITY BANCSHARES C COM 911460103 711,079 34,731 5.14 7,480 -2.91 0.0003
2019-08-22 2019-06-30 13F/A-1 UNITED SECURITY BANCSHARES C COM 911460103 676,348 49,775 7.94 7,704 16.01 0.0003
2019-08-13 2019-06-30 13F UNITED SECURITY BANCSHARES C COM 911460103 676,348 49,775 7,704
2019-05-09 2019-03-31 13F UNITED SECURITY BANCSHARES C COM 911460103 626,573 -27,673 -4.23 6,641 5.95 0.0003
2019-02-08 2018-12-31 13F UNITED SECURITY BANCSHARES C COM 911460103 654,246 15,889 2.49 6,268 -11.56 0.0003
2018-11-09 2018-09-30 13F UNITED SECURITY BANCSHARES C COM 911460103 638,357 10,584 1.69 7,087 0.80 0.0003
2018-08-09 2018-06-30 13F UNITED SECURITY BANCSHARES C COM 911460103 627,773 14,040 2.29 7,031 6.56 0.0003
2018-05-09 2018-03-31 13F UNITED SECURITY BANCSHARES C COM 911460103 613,733 -10,855 -1.74 6,598 -3.97 0.0003
2018-02-09 2017-12-31 13F UNITED SECURITY BANCSHARES C COM 911460103 624,588 12,531 2.05 6,871 18.16 0.0003
2017-11-14 2017-09-30 13F UNITED SECURITY BANCSHARES C COM 911460103 612,057 13,466 2.25 5,815 5.02 0.0003
2017-08-10 2017-06-30 13F UNITED SECURITY BANCSHARES C COM 911460103 598,591 536,691 867.03 5,537 1,127.72 0.0003
2017-05-12 2017-03-31 13F UNITED SECURITY BANCSHARES C COM 911460103 61,900 61,900 451 0.0000
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.