Prosperity Bancshares, Inc.
US ˙ NYSE ˙ US7436061052

SecurityPB / Prosperity Bancshares, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership45,023 shares
Latest Disclosed Value $ 3,025
Amalgamated Bank reports 7.80% increase in ownership of PB / Prosperity Bancshares, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 45,023 shares of Prosperity Bancshares, Inc. (US:PB) valued at $3,024,645 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 41,765 shares of Prosperity Bancshares, Inc.. This represents a change in shares of 7.80% during the quarter. The current value of the position is $3,041,304 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)
2026-05-08 2026-03-31 13F PROSPERITY BANCSHARES COM 743606105 45,023 3,258 7.80 3 50.00 0.0231
2026-02-05 2025-12-31 13F PROSPERITY BANCSHARES COM 743606105 41,765 -1,428 -3.31 3 0.00 0.0208
2025-10-29 2025-09-30 13F PROSPERITY BANCSHARES COM 743606105 43,193 -71 -0.16 3 -33.33 0.0205
2025-08-04 2025-06-30 13F PROSPERITY BANCSHARES COM 743606105 43,264 -20 -0.05 3 0.00 0.0235
2025-04-25 2025-03-31 13F PROSPERITY BANCSHARES COM 743606105 43,284 -1,832 -4.06 3 0.00 0.0264
2025-02-04 2024-12-31 13F PROSPERITY BANCSHARES COM 743606105 45,116 0 0.00 3 0.00 0.0279
2024-10-30 2024-09-30 13F PROSPERITY BANCSHARES COM 743606105 45,116 -13,549 -23.10 3 0.00 0.0268
2024-08-12 2024-06-30 13F PROSPERITY BANCSHARES COM 743606105 58,665 1,203 2.09 4 0.00 0.0306
2024-04-23 2024-03-31 13F PROSPERITY BANCSHARES COM 743606105 57,462 -537 -0.93 4 0.00 0.0323
2024-02-06 2023-12-31 13F PROSPERITY BANCSHARES COM 743606105 57,999 -716 -1.22 4 0.00 0.0313
2023-11-08 2023-09-30 13F PROSPERITY BANCSHARES COM 743606105 58,715 -1,771 -2.93 3 0.00 0.0273
2023-08-11 2023-06-30 13F PROSPERITY BANCSHARES COM 743606105 60,486 -1,692 -2.72 3 0.00 0.0276
2023-05-02 2023-03-31 13F PROSPERITY BANCSHARES COM 743606105 62,178 -10,167 -14.05 4 -40.00 0.0326
2023-02-10 2022-12-31 13F PROSPERITY BANCSHARES COM 743606105 72,345 7,612 11.76 5 -99.88 0.0469
2022-11-09 2022-09-30 13F PROSPERITY BANCSHARES COM 743606105 64,733 -2,710 -4.02 4,316 -6.26 0.0417
2022-08-15 2022-06-30 13F PROSPERITY BANCSHARES COM 743606105 67,443 4,135 6.53 4,604 4.83 0.0429
2022-08-25 2022-03-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 63,308 -2,251 -3.43 4,392 -7.34 0.0341
2022-06-30 2022-03-31 13F PROSPERITY BANCSHARES COM 743606105 63,308 -2,251 4,392 0.0349
2022-02-15 2021-12-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 65,559 -1,060 -1.59 4,740 0.02 0.0350
2022-02-15 2021-12-31 13F PROSPERITY BANCSHARES COM 743606105 65,559 -1,060 4,740 0.0350
2021-10-29 2021-09-30 13F PROSPERITY BANCSHARES COM 743606105 66,619 -6,826 -9.29 4,739 -10.13 0.0400
2021-08-16 2021-06-30 13F PROSPERITY BANCSHARES COM 743606105 73,445 62,277 557.64 5,273 530.74 0.0423
2021-05-13 2021-03-31 13F PROSPERITY BANCSHARES COM 743606105 11,168 -739 -6.21 836 1.21 0.0313
2021-02-12 2020-12-31 13F PROSPERITY BANCSHARES COM 743606105 11,907 36 0.30 826 34.31 0.0313
2020-10-30 2020-09-30 13F PROSPERITY BANCSHARES COM 743606105 11,871 -62 -0.52 615 -13.26 0.0267
2020-08-10 2020-06-30 13F PROSPERITY BANCSHARES COM 743606105 11,933 -9,162 -43.43 709 -30.35 0.0328
2020-05-13 2020-03-31 13F PROSPERITY BANCSHARES COM 743606105 21,095 -473 -2.19 1,018 -34.36 0.0249
2020-02-13 2019-12-31 13F PROSPERITY BANCSHARES COM 743606105 21,568 7,778 56.40 1,551 59.24 0.0285
2019-11-13 2019-09-30 13F PROSPERITY BANCSHARES COM 743606105 13,790 -230 -1.64 974 5.18 0.0205
2019-08-14 2019-06-30 13F PROSPERITY BANCSHARES COM 743606105 14,020 660 4.94 926 0.33 0.0216
2019-05-15 2019-03-31 13F PROSPERITY BANCSHARES COM 743606105 13,360 293 2.24 923 13.39 0.0224
2019-02-15 2018-12-31 13F PROSPERITY BANCSHARES COM 743606105 13,067 -223 -1.68 814 -11.71 0.0231
2018-11-14 2018-09-30 13F PROSPERITY BANCSHARES COM 743606105 13,290 -53 -0.40 922 1.10 0.0228
2018-07-18 2018-06-30 13F PROSPERITY BANCSHARES COM 743606105 13,343 34 0.26 912 -5.69 0.0223
2018-05-22 2018-03-31 13F PROSPERITY BANCSHARES COM 743606105 13,309 -119 -0.89 967 2.76 0.0257
2018-02-13 2017-12-31 13F PROSPERITY BANCSHARES COM 743606105 13,428 743 5.86 941 12.83 0.0255
2017-11-09 2017-09-30 13F PROSPERITY BANCSHARES COM 743606105 12,685 -672 -5.03 834 -2.80 0.0260
2017-08-10 2017-06-30 13F PROSPERITY BANCSHARES COM 743606105 13,357 3,913 41.43 858 30.40 0.0281
2017-05-12 2017-03-31 13F PROSPERITY BANCSHARES COM 743606105 9,444 11 0.12 658 -2.81 0.0328
2017-02-14 2016-12-31 13F PROSPERITY BANCSHARES COM 743606105 9,433 1,075 12.86 677 47.49 0.0306
2016-11-15 2016-09-30 13F/A-1 PROSPERITY BANCSHARES COM 743606105 8,358 67 0.81 459 5.76 0.0266
2016-08-16 2016-06-30 13F PROSPERITY BANCSHARES COM 743606105 8,291 473 6.05 434 19.56 0.0251
2016-05-11 2016-03-31 13F PROSPERITY BANCSHARES COM 743606105 7,818 722 10.17 363 6.76 0.0354
2016-02-10 2015-12-31 13F PROSPERITY BANCSHARES COM 743606105 7,096 -513 -6.74 340 -9.09 0.0419
2015-11-04 2015-09-30 13F PROSPERITY BANCSHARES COM 743606105 7,609 108 1.44 374 -13.63 0.0392
2015-07-10 2015-06-30 13F PROSPERITY BANCSHARES COM 743606105 7,501 7,501 433 0.0425
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.