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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1759425	Mirum Pharmaceuticals Inc.	MIRM	Pharmaceutical Preparations (2834)	831281555

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1780235	Niall O'donnell	C/O Rivervest Venture Partners 101 S. Hanley Road Suite 1850 St.louis MO 63105		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2022-11-11	174,121	$19.99	1,746,997	No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.
Common Stock	Disposition	2022-11-14	32,109	$19.60	1,714,888	No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.
Common Stock	Disposition	2022-11-15	93,770	$19.69	1,621,118	No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.
No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.
No	4	S	Indirect	By RiverVest Venture Fund IV, L.P.

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.95 to $20.28, inclusive. The reporting persons undertake to provide Mirum Pharmaceuticals, Inc., any security holder of Mirum Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3) and (4) to this Form 4.
RiverVest Venture Partners IV, L.P. is the general partner of RiverVest Venture Fund IV, L.P. The Reporting Person is a manager of RiverVest Venture Partners IV, LLC, the sole general partner of RiverVest Venture Partners IV, L.P., and as a result may be deemed to share dispositive voting and investment power with respect to the shares held by RiverVest Venture Partners IV, L.P. The Reporting Person disclaims beneficial ownership of all shares held by RiverVest Venture Partners IV, L.P. except to the extent of his pecuniary interests therein.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.105 to $20.43, inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.00 to $20.32, inclusive.