---
schema_version: "secwatch.filing_event.v1"
accession: "0001212545-24-000133"
form_type: "8-K"
ticker: "WAL"
cik: "0001212545"
company_name: "WESTERN ALLIANCE BANCORPORATION"
filed_at: "2024-04-24T23:59:59+00:00"
generated_at: "2026-06-03T09:22:45.913692+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Western Alliance appoints three new directors, board expanded to 16

## Summary
- Greta Guggenheim, Christopher A. Halmy, and Mary Chris Jammet appointed to board effective April 22, 2024.
- Board expanded to sixteen directors; appointees will stand for election at June 12, 2024 annual meeting.
- Committee assignments: Guggenheim to Risk and Finance/Investment; Halmy to Audit and Finance/Investment; Jammet to Compensation and Audit.
- Each appointee will also serve on the board of Western Alliance Bank and receive standard non-employee director compensation.
- No arrangements or transactions requiring disclosure under Item 404(a) were identified.

## SEC filing metadata
- accession: 0001212545-24-000133
- form_type: 8-K
- ticker: WAL
- cik: 0001212545
- company_name: WESTERN ALLIANCE BANCORPORATION
- filed_at: 2024-04-24T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1212545/000121254524000133/0001212545-24-000133-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1212545/000121254524000133/wal-20240422.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001212545-24-000133
- JSON: https://secwatch.observer/filing/0001212545-24-000133.json
- Plain text: https://secwatch.observer/filing/0001212545-24-000133.txt

## Key facts
- Executive change
  Christopher A. Halmy was appointed as director at WESTERN ALLIANCE BANCORPORATION.
  - Action: appointed
  - Role: director
  source text: On April 22, 2024, the Board of Directors (the “Board”) of Western Alliance Bancorporation (the “Company”) appointed Greta Guggenheim, Christopher A. Halmy and Mary Chris Jammet as directors of the Company, effective immediately, by expanding the Board to sixteen directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1212545/000121254524000133/0001212545-24-000133-index.htm
- Executive change
  Greta Guggenheim was appointed as director at WESTERN ALLIANCE BANCORPORATION.
  - Action: appointed
  - Role: director
  source text: On April 22, 2024, the Board of Directors (the “Board”) of Western Alliance Bancorporation (the “Company”) appointed Greta Guggenheim, Christopher A. Halmy and Mary Chris Jammet as directors of the Company, effective immediately, by expanding the Board to sixteen directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1212545/000121254524000133/0001212545-24-000133-index.htm
- Executive change
  Mary Chris Jammet was appointed as director at WESTERN ALLIANCE BANCORPORATION.
  - Action: appointed
  - Role: director
  source text: On April 22, 2024, the Board of Directors (the “Board”) of Western Alliance Bancorporation (the “Company”) appointed Greta Guggenheim, Christopher A. Halmy and Mary Chris Jammet as directors of the Company, effective immediately, by expanding the Board to sixteen directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1212545/000121254524000133/0001212545-24-000133-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.