Prosperity Bancshares, Inc.
US ˙ NYSE ˙ US7436061052

SecurityPB / Prosperity Bancshares, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership45,220 shares
Latest Disclosed Value $ 3,038,106
Janus Henderson Group Plc reports 8.91% increase in ownership of PB / Prosperity Bancshares, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 45,220 shares of Prosperity Bancshares, Inc. (US:PB) valued at $3,037,880 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 41,520 shares of Prosperity Bancshares, Inc.. This represents a change in shares of 8.91% during the quarter. The current value of the position is $3,108,875 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-18 2026-03-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 45,220 3,700 8.91 3,038 5.89 0.0005
2026-05-15 2026-03-31 13F PROSPERITY BANCSHARES COM 743606105 45,220 3,700 3,038 0.0006
2026-02-17 2025-12-31 13F PROSPERITY BANCSHARES COM 743606105 41,520 0 0.00 2,869 4.18 0.0013
2025-11-14 2025-09-30 13F PROSPERITY BANCSHARES COM 743606105 41,520 0 0.00 2,755 -5.49 0.0013
2025-08-14 2025-06-30 13F PROSPERITY BANCSHARES COM 743606105 41,520 -63 -0.15 2,914 -0.58 0.0014
2025-05-15 2025-03-31 13F PROSPERITY BANCSHARES COM 743606105 41,583 -2,300 -5.24 2,931 -11.37 0.0016
2025-02-14 2024-12-31 13F PROSPERITY BANCSHARES COM 743606105 43,883 -1,500 -3.31 3,307 1.10 0.0017
2024-11-14 2024-09-30 13F PROSPERITY BANCSHARES COM 743606105 45,383 5,750 14.51 3,271 34.83 0.0017
2024-08-14 2024-06-30 13F PROSPERITY BANCSHARES COM 743606105 39,633 -7,165 -15.31 2,427 -21.16 0.0013
2024-05-15 2024-03-31 13F PROSPERITY BANCSHARES COM 743606105 46,798 1 0.00 3,077 -2.90 0.0017
2024-02-14 2023-12-31 13F PROSPERITY BANCSHARES COM 743606105 46,797 -2,572 -5.21 3,170 17.59 0.0019
2023-11-14 2023-09-30 13F PROSPERITY BANCSHARES COM 743606105 49,369 8,502 20.80 2,696 16.82 0.0018
2023-08-14 2023-06-30 13F PROSPERITY BANCSHARES COM 743606105 40,867 -31 -0.08 2,308 -8.31 0.0014
2023-05-15 2023-03-31 13F PROSPERITY BANCSHARES COM 743606105 40,898 23,918 140.86 2,516 103.89 0.0017
2023-02-14 2022-12-31 13F PROSPERITY BANCSHARES COM 743606105 16,980 -1 -0.01 1,234 8.91 0.0009
2023-01-13 2022-09-30 13F/A-1 PROSPERITY BANCSHARES COM 743606105 16,981 18 0.11 1,133 -2.16 0.0008
2022-11-14 2022-09-30 13F PROSPERITY BANCSHARES COM 743606105 16,981 18 1,133 0.0008
2022-08-15 2022-06-30 13F PROSPERITY BANCSHARES COM 743606105 16,963 -2,056 -10.81 1,158 -12.21 0.0008
2022-05-16 2022-03-31 13F PROSPERITY BANCSHARES COM 743606105 19,019 -2 -0.01 1,319 -4.14 0.0006
2022-02-14 2021-12-31 13F PROSPERITY BANCSHARES COM 743606105 19,021 9,684 103.72 1,376 107.23 0.0006
2021-11-16 2021-09-30 13F PROSPERITY BANCSHARES COM 743606105 9,337 9,337 664 0.0003
2021-08-16 2021-06-30 13F PROSPERITY BANCSHARES COM 743606105 0 -506,657 -100.00 0 -100.00
2021-05-17 2021-03-31 13F PROSPERITY BANCSHARES COM 743606105 506,657 -392,011 -43.62 37,944 -39.13 0.0173
2021-02-16 2020-12-31 13F PROSPERITY BANCSHARES COM 743606105 898,668 -144,722 -13.87 62,332 15.26 0.0290
2020-11-16 2020-09-30 13F PROSPERITY BANCSHARES COM 743606105 1,043,390 -294,213 -22.00 54,079 -31.91 0.0282
2020-08-14 2020-06-30 13F PROSPERITY BANCSHARES COM 743606105 1,337,603 263,234 24.50 79,427 53.22 0.0446
2020-05-14 2020-03-31 13F PROSPERITY BANCSHARES COM 743606105 1,074,369 -774,044 -41.88 51,838 -60.99 0.0357
2020-02-18 2019-12-31 13F PROSPERITY BANCSHARES COM 743606105 1,848,413 364,566 24.57 132,882 26.79 0.0680
2019-11-14 2019-09-30 13F PROSPERITY BANCSHARES COM 743606105 1,483,847 9,290 0.63 104,804 7.61 0.0568
2019-07-31 2019-06-30 13F PROSPERITY BANCSHARES COM 743606105 1,474,557 16,108 1.10 97,394 -3.30 0.0530
2019-04-30 2019-03-31 13F PROSPERITY BANCSHARES COM 743606105 1,458,449 -310,673 -17.56 100,720 -8.62 0.0558
2019-02-06 2018-12-31 13F PROSPERITY BANCSHARES COM 743606105 1,769,122 -276,493 -13.52 110,216 -22.31 0.0703
2018-11-09 2018-09-30 13F PROSPERITY BANCSHARES COM 743606105 2,045,615 -9,570 -0.47 141,863 0.98 0.0758
2018-08-10 2018-06-30 13F PROSPERITY BANCSHARES COM 743606105 2,055,185 -13,991 -0.68 140,492 -6.52 0.0801
2018-05-14 2018-03-31 13F PROSPERITY BANCSHARES COM 743606105 2,069,176 90,565 4.58 150,284 8.40 0.0886
2018-03-12 2017-12-31 13F/A-1 PROSPERITY BANCSHARES COM 743606105 1,978,611 20,695 1.06 138,641 7.72 0.0854
2018-02-09 2017-12-31 13F PROSPERITY BANCSHARES COM 743606105 1,978,611 20,695 138,641
2017-11-14 2017-09-30 13F PROSPERITY BANCSHARES COM 743606105 1,957,916 1,017,115 108.11 128,701 112.94 0.0825
2017-08-17 2017-06-30 13F/A-1 PROSPERITY BANCSHARES COM 743606105 940,801 940,801 60,440 0.0412
2017-08-14 2017-06-30 13F PROSPERITY BANCSHARES COM 743606105 940,801 60,440 0.0413
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.