Deerfield Mgmt Form 4 Mirum Pharmaceuticals / MANAGEMENT COMPANY, L.P. ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:	3235-0287
Estimated average burden
hours per response:	0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Flynn James E

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mirum Pharmaceuticals, Inc. [ MIRM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)	X	Other (specify below)
* Possible Member of 10% Group

3. Date of Earliest Transaction (Month/Day/Year)
07/02/2021

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/02/2021		S		10,599	D	$17.011(1)	155,401	I	Through Deerfield Special Situations Fund, L.P.(4)(5)
Common Stock	07/06/2021		S		49,239	D	$16.195(2)	106,162	I	Through Deerfield Special Situations Fund, L.P.(4)(5)
Common Stock	07/07/2021		S		6,837	D	$15.869(3)	99,325	I	Through Deerfield Special Situations Fund, L.P.(4)(5)
Common Stock								1,558,456	I	Through Deerfield Healthcare Innovations Fund, L.P.(4)(5)
Common Stock								1,724,456	I	Through Deerfield Private Design Fund IV, L.P.(4)(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

Flynn James E

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Mgmt HIF, L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

37TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Mgmt IV, L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Private Design Fund IV, L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Healthcare Innovations Fund, L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

37TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Mgmt L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

37TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

Deerfield Special Situations Fund, L.P.

(Last) (First) (Middle)

345 PARK AVENUE SOUTH, 12TH FLOOR

37TH FLOOR

(Street)

NEW YORK NY 10010

(City) (State) (Zip)

Explanation of Responses:

1. The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $16.85 to $17.55, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer 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 and 2 of this Form 4.

2. The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $16.185 to $16.345, inclusive.

3. The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $15.84 to $15.955, inclusive.

4. This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt IV, L.P. is the general partner of Deerfield Private Design Fund IV, L.P. ("Fund IV"). Deerfield Mgmt, L.P. is the general partner of Deerfield Special Situations Fund, L.P. ("Deerfield Special Situations"). Deerfield Mgmt HIF, L.P. is the general partner of Deerfield Healthcare Innovations Fund, L.P. (collectively with Fund IV and Deerfield Special Situations, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P., Deerfield Mgmt IV, L.P., Deerfield Mgmt HIF, L.P. and Deerfield Management Company, L.P.

5. In accordance with Instruction 4 (b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Remarks:

Jonathan Isler, Attorney-in-Fact: Power of Attorney, which is hereby incorporated by reference to Exhibit 24 to a Form 3 with regard to Proteon Therapeutics, Inc. filed with the Securities and Exchange Commission on August 4, 2017 by Deerfield Special Situations Fund, L.P., Deerfield Partners, L.P., Deerfield International Master Fund, L.P., Deerfield Private Design Fund III, L.P., Deerfield Private Design Fund IV, L.P., Deerfield Mgmt, L.P., Deerfield Mgmt III, L.P., Deerfield Mgmt IV, L.P., Deerfield Management Company, L.P., and James E. Flynn.

	/s/ Jonathan Isler, Attorney-in-Fact	07/07/2021
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.