The Board of Directors of Mirum Pharmaceuticals, Inc. (the "Company") sets high standards for the Company's
employees, officers and directors. Implicit in this philosophy is the importance of sound corporate governance. It
is the duty of the Board of Directors to serve as a prudent fiduciary for shareholders and to oversee the management
of the Company's business. To fulfill its responsibilities and to discharge its duty, the Board of Directors follows
the procedures and standards that are set forth in these guidelines. These guidelines are subject to modification
from time to time as the Board of Directors deems appropriate in the best interests of the Company or as required by
applicable laws and regulations.