Western Alliance Bancorporation
MX ˙ BMV ˙ US9576381092
SecurityMX:WAL / Western Alliance Bancorporation
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership891,509 shares
Latest Disclosed Value $ 63,163,420
Ameriprise Financial Inc reports 55.75% increase in ownership of WAL / Western Alliance Bancorporation

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 891,509 shares of Western Alliance Bancorporation (MX:WAL) valued at $63,163,420 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 572,415 shares of Western Alliance Bancorporation. This represents a change in shares of 55.75% during the quarter.

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 WESTERN ALLIANCE BANCORP COM 957638109 891,509 319,094 55.75 63,163 31.26 0.0027
2026-02-17 2025-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 572,415 82,568 16.86 48,123 13.28 0.0109
2025-11-14 2025-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 489,847 6,562 1.36 42,480 12.72 0.0098
2025-08-14 2025-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 483,285 7,350 1.54 37,687 3.07 0.0093
2025-05-14 2025-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 475,935 120,105 33.75 36,562 23.00 0.0099
2025-02-14 2024-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 355,830 1,743 0.49 29,726 -2.93 0.0076
2024-11-14 2024-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 354,087 54,425 18.16 30,625 62.69 0.0079
2024-08-14 2024-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 299,662 -110,635 -26.96 18,825 -28.52 0.0051
2024-05-15 2024-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 410,297 -264,832 -39.23 26,337 -40.71 0.0072
2024-02-14 2023-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 675,129 -256,625 -27.54 44,417 3.70 0.0133
2023-11-14 2023-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 931,754 -152,817 -14.09 42,833 8.29 0.0141
2023-08-14 2023-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,084,571 397,474 57.85 39,554 61.98 0.0124
2023-05-22 2023-03-31 13F/A-1 WESTERN ALLIANCE BANCORP COM 957638109 687,097 687,097 24,419 0.0080
2023-05-15 2023-03-31 13F WESTAMERICA BANCORPORATION COM 957638109 687,097 687,097 24,419 0.0015
2023-02-14 2022-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 0 -5,706 -100.00 0 -100.00
2022-11-14 2022-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 5,706 -206,811 -97.32 377 -97.49 0.0001
2022-08-15 2022-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 212,517 -5,875 -2.69 15,004 -17.05 0.0052
2022-05-16 2022-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 218,392 -44,024 -16.78 18,087 -35.97 0.0053
2022-02-14 2021-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 262,416 10,045 3.98 28,249 1.48 0.0078
2021-11-15 2021-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 252,371 180,884 253.03 27,838 319.69 0.0089
2021-08-16 2021-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 71,487 -162 -0.23 6,633 -1.92 0.0021
2021-05-17 2021-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 71,649 462 0.65 6,763 58.46 0.0022
2021-02-12 2020-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 71,187 1,271 1.82 4,268 93.03 0.0015
2020-11-16 2020-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 69,916 -196,263 -73.73 2,211 -78.06 0.0009
2020-08-14 2020-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 266,179 -115,154 -30.20 10,079 -13.67 0.0043
2020-05-15 2020-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 381,333 -225,613 -37.17 11,675 -66.25 0.0061
2020-02-14 2019-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 606,946 62,962 11.57 34,597 38.02 0.0144
2019-11-14 2019-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 543,984 23,500 4.52 25,067 7.69 0.0112
2019-08-14 2019-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 520,484 -190,528 -26.80 23,276 -20.23 0.0104
2019-05-15 2019-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 711,012 166,033 30.47 29,180 35.58 0.0134
2019-02-14 2018-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 544,979 8,235 1.53 21,522 -29.52 0.0108
2018-11-14 2018-09-30 13F WESTERN ALLIANCE BAN COM 957638109 536,744 -532,445 -49.80 30,536 -49.55 0.0107
2018-08-14 2018-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,069,189 -305,294 -22.21 60,526 -24.22 0.0268
2018-05-14 2018-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,374,483 696,666 102.78 79,871 108.05 0.0361
2018-02-12 2017-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 677,817 106,876 18.72 38,391 26.68 0.0175
2017-11-07 2017-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 570,941 181,812 46.72 30,306 58.30 0.0144
2017-08-10 2017-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 389,129 45,644 13.29 19,145 13.55 0.0096
2017-05-05 2017-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 343,485 -199,837 -36.78 16,860 -36.30 0.0087
2017-02-03 2016-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 543,322 -92,709 -14.58 26,467 10.85 0.0145
2016-11-08 2016-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 636,031 -247,204 -27.99 23,877 -17.09 0.0134
2016-08-08 2016-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 883,235 3,584 0.41 28,800 -1.92 0.0169
2016-05-12 2016-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 879,651 39,985 4.76 29,364 -2.48 0.0175
2016-02-11 2015-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 839,666 -61,054 -6.78 30,110 8.85 0.0177
2015-11-12 2015-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 900,720 34,505 3.98 27,661 -5.41 0.0171
2015-08-13 2015-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 866,215 -130,925 -13.13 29,244 -1.05 0.0166
2015-05-14 2015-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 997,140 38,030 3.97 29,555 10.84 0.0170
2015-02-13 2014-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 959,110 8,518 0.90 26,664 17.37 0.0155
2014-11-14 2014-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 950,592 14,900 1.59 22,718 2.02 0.0137
2014-08-13 2014-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 935,692 3,000 0.32 22,269 -2.95 0.0131
2014-05-14 2014-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 932,692 -286,220 -23.48 22,945 -21.11 0.0138
2014-02-14 2013-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 1,218,912 -10,127 -0.82 29,083 25.01 0.0176
2013-11-14 2013-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,229,039 -61,628 -4.77 23,265 13.88 0.0153
2013-08-14 2013-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 1,290,667 1,290,667 20,430 0.0141
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.