There is a long list of 191 institutional holders of MIRM within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of MIRM by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-MIRM table below, the initial column indicates the name of each top institutional holder of MIRM, with a link to that fund's top holdings. The next columns indicate the amount of MIRM stock held by each of the institutional holders of MIRM, followed by the MIRM position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Frazier Life Sciences Management L.P.	6,495,392	$191,744	12/31/2023
MIRM	6,495,392	$191,744	12/31/2023
BVF Inc. IL	4,370,024	$129,003	12/31/2023
MIRM	4,370,024	$129,003	12/31/2023
Eventide Asset Management LLC	2,663,649	$78,631	12/31/2023
MIRM	2,663,649	$78,631	12/31/2023
Vanguard Group Inc.	2,476,244	$73,099	12/31/2023
MIRM	2,476,244	$73,099	12/31/2023
BlackRock Inc.	2,461,750	$72,671	12/31/2023
MIRM	2,461,750	$72,671	12/31/2023
Janus Henderson Group PLC	2,062,551	$60,893	12/31/2023
MIRM	2,062,551	$60,893	12/31/2023
Cadian Capital Management LP	1,934,922	$57,119	12/31/2023
MIRM	1,934,922	$57,119	12/31/2023
Rock Springs Capital Management LP	1,851,464	$54,655	12/31/2023
MIRM	1,851,464	$54,655	12/31/2023
State Street Corp	1,734,775	$51,211	12/31/2023
MIRM	1,734,775	$51,211	12/31/2023
Novo Holdings A S	1,500,000	$44,280	12/31/2023
MIRM	1,500,000	$44,280	12/31/2023
Citadel Advisors LLC		$42,256	12/31/2023
MIRM	1,442,812	$42,592	12/31/2023
Put	21,900	$646	12/31/2023
Call	10,500	$310	12/31/2023
Price T Rowe Associates Inc. MD	1,164,682	$34,383	12/31/2023
MIRM	1,164,682	$34,383	12/31/2023
Avidity Partners Management LP	1,142,850	$33,737	12/31/2023
MIRM	1,142,850	$33,737	12/31/2023
Tang Capital Management LLC	1,137,107	$33,567	12/31/2023
MIRM	1,137,107	$33,567	12/31/2023
Franklin Resources Inc.	913,068	$26,954	12/31/2023
MIRM	913,068	$26,954	12/31/2023
First Turn Management LLC	836,302	$24,688	12/31/2023
MIRM	836,302	$24,688	12/31/2023
Pictet Asset Management Holding SA	793,655	$23,429	12/31/2023
MIRM	793,655	$23,429	12/31/2023
Geode Capital Management LLC	681,180	$20,112	12/31/2023
MIRM	681,180	$20,112	12/31/2023
Polar Capital Holdings Plc	625,000	$18,450	12/31/2023
MIRM	625,000	$18,450	12/31/2023
William Blair Investment Management LLC	621,778	$18,355	12/31/2023
MIRM	621,778	$18,355	12/31/2023
AXA S.A.	593,713	$17,526	12/31/2023
MIRM	593,713	$17,526	12/31/2023
Adage Capital Partners GP L.L.C.	575,000	$16,974	12/31/2023
MIRM	575,000	$16,974	12/31/2023
Perceptive Advisors LLC	534,942	$15,791	12/31/2023
MIRM	534,942	$15,791	12/31/2023
Boone Capital Management LLC	490,139	$14,469	12/31/2023
MIRM	490,139	$14,469	12/31/2023
Nuveen Asset Management LLC	470,340	$13,884	12/31/2023
MIRM	470,340	$13,884	12/31/2023
Goldman Sachs Group Inc.	456,318	$13,471	12/31/2023
MIRM	456,318	$13,471	12/31/2023
Nicholas Investment Partners LP	398,883	$11,775	12/31/2023
MIRM	398,883	$11,775	12/31/2023
Sofinnova Investments Inc.	352,397	$10,403	12/31/2023
MIRM	352,397	$10,403	12/31/2023
Two Sigma Advisers LP	336,300	$9,928	12/31/2023
MIRM	336,300	$9,928	12/31/2023
Prosight Management LP	293,301	$8,658	12/31/2023
MIRM	293,301	$8,658	12/31/2023
Northern Trust Corp	288,035	$8,503	12/31/2023
MIRM	288,035	$8,503	12/31/2023
Charles Schwab Investment Management Inc.	266,681	$7,872	12/31/2023
MIRM	266,681	$7,872	12/31/2023
Clearbridge Investments LLC	264,097	$7,796	12/31/2023
MIRM	264,097	$7,796	12/31/2023
Woodline Partners LP	253,263	$7,476	12/31/2023
MIRM	253,263	$7,476	12/31/2023
Penn Capital Management Co. Inc.	245,728	$7,263	12/31/2023
MIRM	245,728	$7,263	12/31/2023
Morgan Stanley	244,691	$7,223	12/31/2023
MIRM	244,691	$7,223	12/31/2023
Checkpoint Capital L.P.	233,659	$6,898	12/31/2023
MIRM	233,659	$6,898	12/31/2023
Ardsley Advisory Partners LP	225,000	$6,642	12/31/2023
MIRM	225,000	$6,642	12/31/2023
Millennium Management LLC	224,376	$6,624	12/31/2023
MIRM	224,376	$6,624	12/31/2023
New York State Common Retirement Fund	222,864	$6,579	12/31/2023
MIRM	222,864	$6,579	12/31/2023
Ensign Peak Advisors Inc	222,614	$6,572	12/31/2023
MIRM	222,614	$6,572	12/31/2023
Healthcare of Ontario Pension Plan Trust Fund	211,949	$6,257	12/31/2023
MIRM	211,949	$6,257	12/31/2023
California State Teachers Retirement System	211,111	$6,232	12/31/2023
MIRM	211,111	$6,232	12/31/2023
Two Sigma Investments LP	196,128	$5,790	12/31/2023
MIRM	196,128	$5,790	12/31/2023
Baker BROS. Advisors LP	190,476	$5,623	12/31/2023
MIRM	190,476	$5,623	12/31/2023
Pathway Capital Management LP	190,286	$5,617	12/31/2023
MIRM	190,286	$5,617	12/31/2023
Rice Hall James & Associates LLC	214,887	$5,398	03/31/2024
MIRM	214,887	$5,398	03/31/2024
JPMorgan Chase & Co.		$5,225	12/31/2023
MIRM	186,583	$5,508	12/31/2023
Put	9,600	$283	12/31/2023
Deutsche Bank AG	171,526	$5,063	12/31/2023
MIRM	171,526	$5,063	12/31/2023
Bank of America Corp DE	150,824	$4,452	12/31/2023
MIRM	150,824	$4,452	12/31/2023