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MX ˙ BMV ˙ US9576381092
SecurityMX:WAL / Western Alliance Bancorporation
InstitutionHarbor Advisors LLC
Latest Disclosed Ownership15,000 shares
Latest Disclosed Value $ 1,062,750
Harbor Advisors LLC reports 7.14% increase in ownership of WAL / Western Alliance Bancorporation

On May 7, 2026 - Harbor Advisors LLC filed a 13F-HR form disclosing ownership of 15,000 shares of Western Alliance Bancorporation (MX:WAL) valued at $1,062,750 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 14,000 shares of Western Alliance Bancorporation. This represents a change in shares of 7.14% 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)
2026-05-07 2026-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 15,000 1,000 7.14 1,063 -9.69 0.1535
2026-01-30 2025-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 14,000 5,000 55.56 1,177 50.77 0.1768
2025-11-12 2025-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 9,000 0 0.00 780 11.27 0.1204
2025-08-13 2025-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 9,000 0 0.00 702 1.45 0.1149
2025-05-15 2025-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 9,000 2,000 28.57 691 18.32 0.1201
2025-02-11 2024-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 7,000 2,000 40.00 585 35.19 0.0919
2024-11-14 2024-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 5,000 0 0.00 432 37.58 0.0724
2024-07-30 2024-06-30 13F WESTERN ALLIANCE BANCORP COM 957638109 5,000 0 0.00 314 -1.87 0.0576
2024-05-01 2024-03-31 13F WESTERN ALLIANCE BANCORP COM 957638109 5,000 0 0.00 321 -2.44 0.0590
2024-02-01 2023-12-31 13F WESTERN ALLIANCE BANCORP COM 957638109 5,000 0 0.00 329 43.23 0.0629
2023-11-07 2023-09-30 13F WESTERN ALLIANCE BANCORP COM 957638109 5,000 5,000 230 0.0492
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.