Western Alliance Bancorporation
US ˙ NYSE ˙ US9576381092

SecurityWAL / Western Alliance Bancorporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership1,372,535 shares
Latest Disclosed Value $ 97,242,462
Janus Henderson Group Plc reports 1.63% decrease in ownership of WAL / Western Alliance Bancorporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 1,372,535 shares of Western Alliance Bancorporation (US:WAL) valued at $97,244,105 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,395,277 shares of Western Alliance Bancorporation. This represents a change in shares of -1.63% during the quarter. The current value of the position is $110,818,476 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)
2026-05-18 2026-03-31 13F/A-1 WESTERN ALLIANCE BANCORP COM 957638109 1,372,535 -22,742 -1.63 97,242 -17.10 0.0164
2026-05-15 2026-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,372,535 -22,742 -1.63 97,242 -17.10 0.0180
2026-02-17 2025-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,395,277 -389,648 -21.83 117,302 -24.22 0.0525
2025-11-14 2025-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,784,925 -117 -0.01 154,789 11.20 0.0707
2025-08-14 2025-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,785,042 -571,849 -24.26 139,200 -22.41 0.0682
2025-05-15 2025-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 2,356,891 15,338 0.66 179,404 -8.29 0.0983
2025-02-14 2024-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 2,341,553 445,176 23.48 195,616 19.26 0.0994
2024-11-14 2024-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,896,377 74,956 4.12 164,019 43.35 0.0840
2024-08-14 2024-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,821,421 204,130 12.62 114,421 10.22 0.0613
2024-05-15 2024-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,617,291 -1,829 -0.11 103,811 -2.54 0.0566
2024-02-14 2023-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,619,120 339,505 26.53 106,522 81.08 0.0635
2023-11-14 2023-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,279,615 299,561 30.57 58,825 64.58 0.0385
2023-08-14 2023-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 980,054 917,598 1,469.19 35,743 1,510.73 0.0222
2023-05-15 2023-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 62,456 28,581 84.37 2,219 10.01 0.0015
2023-02-14 2022-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 33,875 2,300 7.28 2,017 -2.84 0.0014
2023-01-13 2022-09-30 13F/A-1 WESTERN ALLIANCE BANCORP COM 957638109 31,575 1,834 6.17 2,076 -1.19 0.0016
2022-11-14 2022-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 31,575 1,834 2,076 0.0005
2022-08-15 2022-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 29,741 4,028 15.67 2,101 -1.32 0.0014
2022-05-16 2022-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 25,713 -1,068 -3.99 2,129 -26.15 0.0010
2022-02-14 2021-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 26,781 10,417 63.66 2,883 61.97 0.0012
2021-11-16 2021-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 16,364 11,990 274.12 1,780 338.42 0.0008
2021-08-16 2021-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 4,374 993 29.37 406 27.27 0.0002
2021-05-17 2021-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 3,381 -1,239 -26.82 319 15.16 0.0001
2021-02-16 2020-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 4,620 4,620 277 0.0001
2020-11-16 2020-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 0 -52,088 -100.00 0 -100.00
2020-08-14 2020-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 52,088 -47,129 -47.50 1,973 -35.03 0.0011
2020-05-14 2020-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 99,217 93,080 1,516.70 3,037 767.71 0.0021
2020-02-18 2019-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 6,137 -1,024 -14.30 350 6.06 0.0002
2019-11-14 2019-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 7,161 823 12.99 330 16.61 0.0002
2019-07-31 2019-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 6,338 -3,707 -36.90 283 -31.31 0.0002
2019-04-30 2019-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 10,045 -4,691 -31.83 412 -29.21 0.0002
2019-02-06 2018-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 14,736 -10,792 -42.28 582 -59.92 0.0004
2018-11-09 2018-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 25,528 870 3.53 1,452 4.01 0.0008
2018-08-10 2018-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 24,658 17,160 228.86 1,396 220.18 0.0008
2018-05-14 2018-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 7,498 7,498 436 0.0003
2017-11-14 2017-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 0 -74,891 -100.00 0 -100.00
2017-08-17 2017-06-30 13F/A-1 WESTERN ALLIANCE BANCORP COM 957638109 74,891 74,891 3,685 0.0025
2017-08-14 2017-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 74,891 3,685 0.0025
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.