There is a long list of 83 institutional holders of KZR 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 KZR by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-KZR table below, the initial column indicates the name of each top institutional holder of KZR, with a link to that fund's top holdings. The next columns indicate the amount of KZR stock held by each of the institutional holders of KZR, followed by the KZR 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
Suvretta Capital Management LLC	7,167,591	$6,791	12/31/2023
KZR	7,167,591	$6,791	12/31/2023
Avidity Partners Management LP	5,025,454	$4,761	12/31/2023
KZR	5,025,454	$4,761	12/31/2023
BlackRock Inc.	4,817,266	$4,564	12/31/2023
KZR	4,817,266	$4,564	12/31/2023
Prosight Management LP	3,365,333	$3,188	12/31/2023
KZR	3,365,333	$3,188	12/31/2023
Vanguard Group Inc.	3,063,484	$2,902	12/31/2023
KZR	3,063,484	$2,902	12/31/2023
Millennium Management LLC	2,927,563	$2,774	12/31/2023
KZR	2,927,563	$2,774	12/31/2023
Sphera Funds Management LTD.	2,051,676	$1,944	12/31/2023
KZR	2,051,676	$1,944	12/31/2023
Orbimed Advisors LLC	1,927,000	$1,826	12/31/2023
KZR	1,927,000	$1,826	12/31/2023
Granahan Investment Management Inc. MA	1,906,175	$1,806	12/31/2023
KZR	1,906,175	$1,806	12/31/2023
Geode Capital Management LLC	1,354,648	$1,284	12/31/2023
KZR	1,354,648	$1,284	12/31/2023
Two Sigma Advisers LP	1,322,300	$1,253	12/31/2023
KZR	1,322,300	$1,253	12/31/2023
Renaissance Technologies LLC	1,291,919	$1,224	12/31/2023
KZR	1,291,919	$1,224	12/31/2023
Acadian Asset Management LLC	1,256,635	$1,189	12/31/2023
KZR	1,256,635	$1,189	12/31/2023
Two Sigma Investments LP	1,216,247	$1,152	12/31/2023
KZR	1,216,247	$1,152	12/31/2023
State Street Corp	1,116,052	$1,057	12/31/2023
KZR	1,116,052	$1,057	12/31/2023
Jacobs Levy Equity Management Inc.	970,835	$920	12/31/2023
KZR	970,835	$920	12/31/2023
Ikarian Capital LLC	853,391	$809	12/31/2023
KZR	853,391	$809	12/31/2023
Qiming U.S. Ventures Management LLC	828,711	$785	12/31/2023
KZR	828,711	$785	12/31/2023
Anson Funds Management LP	611,249	$579	12/31/2023
KZR	611,249	$579	12/31/2023
Northern Trust Corp	543,466	$515	12/31/2023
KZR	543,466	$515	12/31/2023
Citadel Advisors LLC		$440	12/31/2023
KZR	365,329	$346	12/31/2023
Call	100,400	$95	12/31/2023
Put	800	$1	12/31/2023
Goldman Sachs Group Inc.	442,721	$419	12/31/2023
KZR	442,721	$419	12/31/2023
D. E. Shaw & Co. Inc.	376,976	$357	12/31/2023
KZR	376,976	$357	12/31/2023
Schroder Investment Management Group	350,394	$332	12/31/2023
KZR	350,394	$332	12/31/2023
Nuveen Asset Management LLC	314,762	$298	12/31/2023
KZR	314,762	$298	12/31/2023
Tang Capital Management LLC	306,665	$291	12/31/2023
KZR	306,665	$291	12/31/2023
Deutsche Bank AG	279,265	$265	12/31/2023
KZR	279,265	$265	12/31/2023
GSA Capital Partners LLP	260,407	$247	12/31/2023
KZR	260,407	$247	12/31/2023
Morgan Stanley	259,283	$246	12/31/2023
KZR	259,283	$246	12/31/2023
Charles Schwab Investment Management Inc.	226,490	$215	12/31/2023
KZR	226,490	$215	12/31/2023
Bank of New York Mellon Corp	222,217	$211	12/31/2023
KZR	222,217	$211	12/31/2023
BNP Paribas Arbitrage SA	201,887	$191	12/31/2023
KZR	201,887	$191	12/31/2023
Squarepoint Ops LLC	186,705	$177	12/31/2023
KZR	186,705	$177	12/31/2023
Susquehanna International Group LLP		$156	12/31/2023
KZR	85,407	$81	12/31/2023
Call	78,800	$75	12/31/2023
Bridgeway Capital Management Inc.	158,600	$150	12/31/2023
KZR	158,600	$150	12/31/2023
Boothbay Fund Management LLC	134,884	$128	12/31/2023
KZR	134,884	$128	12/31/2023
Rhumbline Advisers	106,855	$101	12/31/2023
KZR	106,855	$101	12/31/2023
HRT Financial LP	103,785	$98	12/31/2023
KZR	103,785	$98	12/31/2023
Barclays PLC	98,037	$93	12/31/2023
KZR	98,037	$93	12/31/2023
Wells Fargo & Company MN	95,815	$91	12/31/2023
KZR	95,815	$91	12/31/2023
Bank of America Corp DE	89,241	$85	12/31/2023
KZR	89,241	$85	12/31/2023
Panagora Asset Management Inc.	84,087	$80	12/31/2023
KZR	84,087	$80	12/31/2023
Alliancebernstein L.P.	79,058	$75	12/31/2023
KZR	79,058	$75	12/31/2023
Amundi	82,243	$75	12/31/2023
KZR	82,243	$75	12/31/2023
Jane Street Group LLC	69,432	$66	12/31/2023
KZR	69,432	$66	12/31/2023
Pale Fire Capital SE	68,851	$65	12/31/2023
KZR	68,851	$65	12/31/2023
Engineers Gate Manager LP	56,826	$54	12/31/2023
KZR	56,826	$54	12/31/2023
UBS Group AG	49,174	$47	12/31/2023
KZR	49,174	$47	12/31/2023
JPMorgan Chase & Co.	46,259	$44	12/31/2023
KZR	46,259	$44	12/31/2023
Price T Rowe Associates Inc. MD	46,347	$44	12/31/2023
KZR	46,347	$44	12/31/2023