EAST WEST BANCORP INC

Note 10 — Stock Compensation Plans

Pursuant to the Company’s 2021 Stock Incentive Plan, as amended, the Company may issue stock, stock options, restricted stock, RSUs including performance-based RSUs, stock purchase warrants, stock appreciation rights, phantom stock and dividend equivalents to eligible employees, non-employee directors, consultants, and other service providers of East West and its subsidiaries. RSUs represent the Company’s primary form of stock-based incentive awards. There wereno outstanding awards other than RSUs as of both September 30, 2026 and December 31, 2025.

Total stock compensation expense associated with the Company’s various employee stock compensation plans was $16 million and $52 million for the three and nine months ended September 30, 2026, respectively, compared with $36 million and $63 million for the three and nine months ended September 30, 2025, respectively.

Restricted Stock Units — RSUs are granted under the Company’s long-term incentive plan at no cost to the recipient and generally cliff vest after three years of continued employment. Upon vesting, RSUs are settled in shares of the Company’s common stock, and accrued dividends are paid. Certain RSUs are subject only to time-based vesting conditions, while performance-based RSUs are subject to specified performance criteria. Performance-based RSUs are granted annually upon approval by the Company’s Compensation and Management Development Committee based on performance in the year preceding the grant date. The number of performance-based RSUs that ultimately vest may range from 0% to a maximum of 200% of the target award, based on the Company’s achievement of specified performance criteria over athree-year performance period. For information regarding the Company’s accounting for stock-based compensation plans, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Stock-Based Compensation to the Consolidated Financial Statements in the Company’s 2025 Form 10-K.

The following table summarizes activity in the Company’s time- and performance-based RSUs that were settled in shares for the nine months ended September 30, 2026. Performance-based RSUs are presented at the target award level, assuming 100% of the applicable performance criteria.

As of September 30, 2026, unrecognized compensation costs related to unvested time-based RSUs and performance-based RSUs were $44 million and $9 million, respectively, and are expected to be recognized over weighted-average periods of 1.9 years and 2.1 years, respectively.