X0306 5 2020-12-31 0 0 0000084246 RLI CORP RLI 0001540227 Diefenthaler Aaron Paul 9025 N. LINDBERGH DRIVE PEORIA IL 61615 1 VP, CIO, Treasurer Common Stock 20752.2849 D Common Stock 3187.3056 I Employee Stock Ownership Plan - ESOP Common Stock 1319.0725 I By Executive Deferred Compensation Stock Option 93.24 2021-08-21 2028-08-21 Common Stock 12500 12500 D Restricted Stock Unit Common Stock 300 300 D Restricted Stock Unit Common Stock 300 300 D Stock Option 47.61 2016-05-07 2023-05-07 Common Stock 12000 12000 D Stock Option 64.09 2017-05-05 2024-05-05 Common Stock 9000 9000 D Stock Option 56.71 2018-05-04 2025-05-04 Common Stock 11000 11000 D Stock Option 63.14 2019-05-03 2026-05-03 Common Stock 9000 9000 D Stock Option 82.66 2020-05-02 2027-05-02 Common Stock 7500 7500 D Ownership reflects dividend reinvestment Balance reflects annual company contributions and dividend reinvestment. Pursuant to option schedule wherein 20% of the aggregate number of shares granted may be exercised commencing one year from grant date and each year thereafter in 20% increments. Upon vesting, each restricted stock unit represents the right to receive one share of common stock. These restricted stock units are scheduled to vest 100% on the third anniversary of the date of grant. Upon vesting, each restricted stock unit represents the right to receive one share of common stock. Stock option grant price adjusted to reflect $2.00 extraordinary dividend declared 11-12-15. /s/ Aaron Paul Diefenthaler 2021-01-29