Prosperity Bancshares, Inc.
US ˙ NYSE ˙ US7436061052

SecurityPB / Prosperity Bancshares, Inc.
InstitutionBrown Advisory Inc
Latest Disclosed Ownership1,565,282 shares
Latest Disclosed Value $ 105,155,655
Brown Advisory Inc reports 21.98% decrease in ownership of PB / Prosperity Bancshares, Inc.

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 1,565,282 shares of Prosperity Bancshares, Inc. (US:PB) valued at $105,155,645 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,006,168 shares of Prosperity Bancshares, Inc.. This represents a change in shares of -21.98% during the quarter. The current value of the position is $105,734,799 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 PROSPERITY BANCSHARES COM 743606105 1,565,282 -440,886 -21.98 105,156 -24.16 0.0770
2026-02-13 2025-12-31 13F PROSPERITY BANCSHARES COM 743606105 2,006,168 -20,079 -0.99 138,646 3.13 0.1934
2025-11-14 2025-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,026,247 42,823 2.16 134,442 -3.50 0.1750
2025-08-13 2025-06-30 13F PROSPERITY BANCSHARES COM 743606105 1,983,424 -259,817 -11.58 139,316 -12.98 0.1834
2025-04-30 2025-03-31 13F PROSPERITY BANCSHARES COM 743606105 2,243,241 -106,741 -4.54 160,100 -9.58 0.2288
2025-02-14 2024-12-31 13F PROSPERITY BANCSHARES COM 743606105 2,349,982 -83,209 -3.42 177,071 0.98 0.2246
2024-11-13 2024-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,433,191 18,298 0.76 175,360 18.77 0.2202
2024-08-14 2024-06-30 13F PROSPERITY BANCSHARES COM 743606105 2,414,893 -131,804 -5.18 147,647 -11.86 0.1930
2024-04-24 2024-03-31 13F PROSPERITY BANCSHARES COM 743606105 2,546,697 14,727 0.58 167,522 -2.31 0.2239
2024-02-08 2023-12-31 13F PROSPERITY BANCSHARES COM 743606105 2,531,970 8,373 0.33 171,490 24.51 0.2411
2023-10-25 2023-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,523,597 -33,751 -1.32 137,738 -4.64 0.2261
2023-07-31 2023-06-30 13F PROSPERITY BANCSHARES COM 743606105 2,557,348 -16,809 -0.65 144,439 -8.79 0.2256
2023-05-08 2023-03-31 13F PROSPERITY BANCSHARES COM 743606105 2,574,157 13,890 0.54 158,362 -14.90 0.2681
2023-02-13 2022-12-31 13F PROSPERITY BANCSHARES COM 743606105 2,560,267 -21,963 -0.85 186,080 8.07 0.3456
2022-11-14 2022-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,582,230 30,734 1.20 172,184 -1.15 0.3349
2022-11-14 2022-06-30 13F/A-2 PROSPERITY BANCSHARES COM 743606105 2,551,496 20,858 0.82 174,191 -0.79 0.3276
2022-09-13 2022-06-30 13F/A-1 PROSPERITY BANCSHARES COM 743606105 2,473,989 22,215 168,899 0.2921
2022-08-02 2022-06-30 13F PROSPERITY BANCSHARES COM 743606105 2,472,169 19,561 168,892 0.1123
2022-11-14 2022-03-31 13F/A-2 PROSPERITY BANCSHARES COM 743606105 2,530,638 70,251 2.86 175,576 -1.30 0.2617
2022-09-13 2022-03-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 2,451,774 -8,613 170,104 0.2388
2022-05-09 2022-03-31 13F PROSPERITY BANCSHARES COM 743606105 2,452,608 -7,779 170,247 0.2314
2022-01-27 2021-12-31 13F PROSPERITY BANCSHARES COM 743606105 2,460,387 270,020 12.33 177,886 14.18 0.2204
2021-11-12 2021-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,190,367 161,368 7.95 155,800 6.94 0.2300
2021-07-29 2021-06-30 13F PROSPERITY BANCSHARES COM 743606105 2,028,999 101,199 5.25 145,683 0.91 0.2196
2021-05-14 2021-03-31 13F PROSPERITY BANCSHARES COM 743606105 1,927,800 491,612 34.23 144,372 44.93 0.2468
2021-02-12 2020-12-31 13F PROSPERITY BANCSHARES COM 743606105 1,436,188 328,786 29.69 99,614 73.55 0.1768
2020-11-16 2020-09-30 13F PROSPERITY BANCSHARES COM 743606105 1,107,402 73,967 7.16 57,397 -6.47 0.1186
2020-08-14 2020-06-30 13F PROSPERITY BANCSHARES COM 743606105 1,033,435 56,574 5.79 61,366 30.19 0.1430
2020-05-15 2020-03-31 13F PROSPERITY BANCSHARES COM 743606105 976,861 7,535 0.78 47,134 -32.36 0.1444
2020-02-14 2019-12-31 13F PROSPERITY BANCSHARES COM 743606105 969,326 14,336 1.50 69,684 3.31 0.1768
2019-11-14 2019-09-30 13F PROSPERITY BANCSHARES COM 743606105 954,990 226,860 31.16 67,451 40.25 0.1893
2019-08-12 2019-06-30 13F PROSPERITY BANCSHARES COM 743606105 728,130 127,045 21.14 48,093 15.85 0.1376
2019-05-15 2019-03-31 13F PROSPERITY BANCSHARES COM 743606105 601,085 71,221 13.44 41,512 25.75 0.1177
2019-02-13 2018-12-31 13F PROSPERITY BANCSHARES COM 743606105 529,864 6,263 1.20 33,012 -9.09 0.1109
2018-11-13 2018-09-30 13F PROSPERITY BANCSHARES COM 743606105 523,601 17,688 3.50 36,313 5.00 0.1033
2018-08-10 2018-06-30 13F PROSPERITY BANCSHARES COM 743606105 505,913 -10,355 -2.01 34,584 -7.77 0.1064
2018-06-28 2018-03-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 516,268 5,697 1.12 37,497 4.81 0.1212
2018-05-14 2018-03-31 13F PROSPERITY BANCSHARES COM 743606105 298,686 -211,885 21,694
2018-02-12 2017-12-31 13F PROSPERITY BANCSHARES COM 743606105 510,571 14,762 2.98 35,775 9.77 0.1133
2017-11-13 2017-09-30 13F PROSPERITY BANCSHARES COM 743606105 495,809 23,337 4.94 32,590 7.38 0.1081
2017-08-14 2017-06-30 13F PROSPERITY BANCSHARES COM 743606105 472,472 18,800 4.14 30,351 -4.03 0.0928
2017-05-15 2017-03-31 13F PROSPERITY BANCSHARES COM 743606105 453,672 25,427 5.94 31,625 2.88 0.1079
2017-02-13 2016-12-31 13F PROSPERITY BANCSHARES COM 743606105 428,245 29,081 7.29 30,739 40.30 0.1097
2016-11-14 2016-09-30 13F PROSPERITY BANCSHARES COM 743606105 399,164 31,528 8.58 21,910 16.88 0.0753
2016-08-09 2016-06-30 13F PROSPERITY BANCSHARES COM 743606105 367,636 11,524 3.24 18,746 13.47 0.0659
2016-05-13 2016-03-31 13F PROSPERITY BANCSHARES COM 743606105 356,112 -313,470 -46.82 16,520 -48.45 0.0570
2016-02-08 2015-12-31 13F PROSPERITY BANCSHARES COM 743606105 669,582 29,879 4.67 32,046 2.00 0.1087
2015-11-13 2015-09-30 13F PROSPERITY BANCSHARES COM 743606105 639,703 21,147 3.42 31,417 -12.04 0.1122
2015-08-11 2015-06-30 13F PROSPERITY BANCSHARES COM 743606105 618,556 -66,807 -9.75 35,716 -0.70 0.1163
2015-05-14 2015-03-31 13F PROSPERITY BANCSHARES COM 743606105 685,363 -23,099 -3.26 35,969 -8.29 0.1145
2015-02-13 2014-12-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 708,462 -144,491 -16.94 39,221 -19.57 0.1237
2015-02-09 2014-12-31 13F PROSPERITY BANCSHARES COM 743606105 721,534 40,004
2014-11-10 2014-09-30 13F PROSPERITY BANCSHARES COM 743606105 852,953 10,032 1.19 48,763 -7.59 0.1567
2014-08-08 2014-06-30 13F PROSPERITY BANCSHARES COM 743606105 842,921 23,574 2.88 52,767 -2.64 0.1660
2014-05-13 2014-03-31 13F PROSPERITY BANCSHARES COM 743606105 819,347 28,678 3.63 54,200 8.14 0.1727
2014-02-11 2013-12-31 13F PROSPERITY BANCSHARES COM 743606105 790,669 35,667 4.72 50,120 7.35 0.1625
2013-11-08 2013-09-30 13F PROSPERITY BANCSHARES COM 743606105 755,002 199,957 36.03 46,689 62.42 0.1667
2013-08-13 2013-06-30 13F PROSPERITY BANCSHARES COM 743606105 555,045 555,045 28,746 0.1151
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.