서부 동맹 은행
MX ˙ BMV ˙ US9576381092
SecurityMX:WAL / Western Alliance Bancorporation
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership50,529 shares
Latest Disclosed Value $ 3,579,980
Bnp Paribas Arbitrage, Sa reports 140.20% increase in ownership of WAL / Western Alliance Bancorporation

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 50,529 shares of Western Alliance Bancorporation (MX:WAL) valued at $3,579,980 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 21,036 shares of Western Alliance Bancorporation. This represents a change in shares of 140.20% 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)
2026-05-12 2026-03-31 13F Western Alliance Bancorp Equity 957638109 50,529 29,493 140.20 3,580 102.43 0.0002
2026-02-10 2025-12-31 13F Western Alliance Bancorp Equity 957638109 21,036 -1,830 -8.00 1,768 -10.80 0.0008
2025-11-13 2025-09-30 13F Western Alliance Bancorp Equity 957638109 22,866 10,886 90.87 1,983 112.21 0.0011
2025-08-14 2025-06-30 13F Western Alliance Bancorp Equity 957638109 11,980 -1,158 -8.81 934 -7.43 0.0005
2025-05-14 2025-03-31 13F Western Alliance Bancorp Equity 957638109 13,138 896 7.32 1,009 -1.27 0.0006
2025-02-14 2024-12-31 13F Western Alliance Bancorp Equity 957638109 12,242 -21,831 -64.07 1,023 -65.31 0.0006
2024-11-13 2024-09-30 13F Western Alliance Bancorp Equity 957638109 34,073 31,214 1,091.78 2,947 1,545.81 0.0020
2024-08-13 2024-06-30 13F Western Alliance Bancorp Equity 957638109 2,859 -55,332 -95.09 180 -95.21 0.0001
2024-05-01 2024-03-31 13F Western Alliance Bancorp Equity 957638109 58,191 54,865 1,649.58 3,735 1,613.30 0.0033
2024-02-14 2023-12-31 13F/A-2 Western Alliance Bancorp Equity 957638109 3,326 -288,362 -98.86 219 -98.37 0.0002
2024-02-07 2023-12-31 13F/A-1 Western Alliance Bancorp Equity 957638109 3,326 -288,362 219 0.0000
2024-02-07 2023-12-31 13F Western Alliance Bancorp Equity 957638109 3,326 219
2023-11-14 2023-09-30 13F Western Alliance Bancorp Equity 957638109 291,688 286,825 5,898.11 13,409 7,475.14 0.0172
2023-08-09 2023-06-30 13F Western Alliance Bancorp Equity 957638109 4,863 2,363 94.52 177 101.14 0.0002
2023-05-12 2023-03-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 2,500 -36,628 -93.61 89 -96.22 0.0001
2023-02-14 2022-12-31 13F Western Alliance Bancorp Equity 957638109 39,128 -5,512 -12.35 2,330 -20.59 0.0036
2022-11-16 2022-09-30 13F/A-1 Western Alliance Bancorp Equity 957638109 44,640 3,107 7.48 2,935 0.07 0.0047
2022-11-15 2022-09-30 13F Western Alliance Bancorp Equity 957638109 44,640 3,107 2,935 0.0007
2022-08-12 2022-06-30 13F Western Alliance Bancorp Equity 957638109 41,533 -88,894 -68.16 2,932 -72.85 0.0046
2022-05-18 2022-03-31 13F/A-1 Western Alliance Bancorp Equity 957638109 130,427 89,303 217.16 10,802 144.04 0.0145
2022-02-09 2021-12-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 41,124 1,141 2.85 4,427 1.75 0.0063
2021-11-16 2021-09-30 13F/A-1 WESTERN ALLIANCE BANCORP EQUITY 957638109 39,983 -19,096 -32.32 4,351 -20.69 0.0062
2021-11-12 2021-09-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 17,992 -41,087 569 0.0000
2021-08-10 2021-06-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 59,079 31,595 114.96 5,485 111.37 0.0073
2021-05-07 2021-03-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 27,484 -8,965 -24.60 2,596 18.76 0.0038
2021-02-10 2020-12-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 36,449 18,457 102.58 2,185 284.68 0.0041
2020-10-30 2020-09-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 17,992 -3,930 -17.93 569 -31.57 0.0008
2020-08-06 2020-06-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 21,922 1,198 5.78 830 30.91 0.0015
2020-05-13 2020-03-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 20,724 -603 -2.83 634 -47.82 0.0013
2020-02-12 2019-12-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 21,327 -10,783 -33.58 1,216 -17.85 0.0022
2019-11-07 2019-09-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 32,110 -7,150 -18.21 1,480 -15.73 0.0026
2019-07-30 2019-06-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 39,260 -66,400 -62.84 1,756 -59.52 0.0035
2019-04-25 2019-03-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 105,660 -67,545 -39.00 4,336 -36.60 0.0094
2019-02-12 2018-12-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 173,205 55,120 46.68 6,840 1.82 0.0162
2018-11-07 2018-09-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 118,085 9,577 8.83 6,718 9.36 0.0099
2018-07-25 2018-06-30 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 108,508 83,253 329.65 6,143 318.68 0.0102
2018-05-11 2018-03-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 25,255 -11,050 -30.44 1,468 -28.61 0.0027
2018-03-05 2017-12-31 13F/A-1 WESTERN ALLIANCE BANCORP EQUITY 957638109 36,305 24,398 204.90 2,056 225.16 0.0036
2018-02-01 2017-12-31 13F WESTERN ALLIANCE BANCORP EQUITY 957638109 36,305 24,398 2,056
2017-11-03 2017-09-30 13F WESTERN ALLIANCE BANCORP STOCK 957638109 11,907 9,376 370.45 632 409.68 0.0015
2017-08-03 2017-06-30 13F WESTERN ALLIANCE BANCORP STOCK 957638109 2,531 1,060 72.06 125 72.22 0.0004
2017-05-03 2017-03-31 13F WESTERN ALLIANCE BANCORP STOCK 957638109 1,471 -5,255 -78.13 72 -77.98 0.0002
2017-02-14 2016-12-31 13F WESTERN ALLIANCE BANCORP STOCK 957638109 6,726 381 6.00 328 37.39 0.0015
2016-10-05 2016-09-30 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 6,345 -2,924 -31.55 238 -21.19 0.0010
2016-07-06 2016-06-30 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 9,269 9,205 14,382.81 303 15,000.00 0.0014
2016-04-22 2016-03-31 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 64 -8,273 -99.23 2 -99.33 0.0000
2016-04-19 2015-12-31 13F/A-1 * WESTERN ALLIANCE BANCORP COM STOCK 957638109 8,337 -9,130 -52.27 299 -44.40 0.0015
2016-02-10 2015-12-31 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 8,337 299
2015-11-13 2015-09-30 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 17,467 10,990 169.68 536 145.87 0.0013
2015-08-14 2015-06-30 13F WESTERN ALLIANCE BANCORP COM STOCK 957638109 6,477 4,685 261.44 219 311.32 0.0006
2015-05-15 2015-03-31 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 1,792 1,792 -60.50 53 -51.02 0.0001
2015-02-11 2014-12-31 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 0 -4,537 -100.00 0 -100.00
2014-11-12 2014-09-30 13F * WESTERN ALLIANCE BANCORP COM STOCK 957638109 4,537 4,359 2,448.88 108 2,600.00 0.0001
2014-08-14 2014-06-30 13F/A-1 * WESTERN ALLIANCE BANCORP COM STOCK 957638109 178 -783 -81.48 4 -81.82 0.0000
2014-08-14 2014-06-30 13F WESTERN ALLIANCE BANCORP COM STOCK 957638109 178 4
2014-04-02 2013-12-31 13F/A-1 WESTERN ALLIANCE BANCORP STOCK 957638109 961 -19,381 -95.28 23 -94.29 0.0000
2013-11-13 2013-09-30 13F WESTERN ALLIANCE BANCORP STOCK 957638109 20,342 -5,873 -22.40 385 -7.00 0.0003
2013-08-13 2013-06-30 13F WESTERN ALLIANCE BANCORP STOCK 957638109 26,215 26,215 415 0.0003
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.