How many institutions own KZR stock?

A company's 13F filings with the Securities and Exchange Commission (SEC) provides investors with comprehensive information about institutional ownership in a listed company, a sign of strength in terms of how many institutions have confidence in that company. The number of institutional investors who currently own KZR shares is 46, representing 61.12% of the company's common stock.

Who are the major shareholders selling Kezar Life Sciences, Inc. stock?

SPHERA FUNDS MANAGEMENT LTD., in the last quarter, reduced its stake in KZR by -100% restricting it's holding to 0 shares of worth nearly -. VANGUARD GROUP INC also lessened -2.92% of the KZR shares from its portfolio, reducing its holding to 268.17 thousand shares of worth $1.05M. DIMENSIONAL FUND ADVISORS LP also shunned KZR shares holding by -22.49% last quarter which brought its holding to 23.23 thousand shares worth $90.60K.

Investors who are buying KZR stock?

As per its latest 13F filing, CITADEL ADVISORS LLC increased its stake in KZR by 100% in the last quarter. The institutional holder raised its holding to 15.7 thousand shares having worth more than $61.23K. STONEPINE CAPITAL MANAGEMENT, LLC also added 125.59% more shares of KZR to its portfolio, raising its holding to 383.18 thousand shares of worth $1.49M. BML CAPITAL MANAGEMENT, LLC also increased its KZR shares holding by 13.48% which brought its holding to 720.79 thousand shares worth $2.81M.

KZR's major insiders: who are they?

The insider with the most stakes in KZR is Equal Talent Investments Ltd , 10 percent owner at the company. Additionally, KZR stock is highly held by 10 percent owner Morningside Venture Investments Ltd and 10 percent owner Cormorant Asset Management, LP among others.

Did an insider recently sell KZR stock?

Company executives, directors, and other insiders own 10.57% percent of Kezar Life Sciences, Inc.'s stock. Within the last six months, there have been 0 transaction(s) in which KZR insiders have sold stock, totaling 0 shares. Insiders that have sold shares include SCHILLER MARK C., CHIANG PICHI LUO, and MORNINGSIDE VENTURE INVESTMENTS LTD.

Which insider recently purchased KZR stock?

There have been 0 transaction(s) during the past 6-months in which Kezar Life Sciences, Inc. insiders have bought stock, totalling 0 shares

How much of KZR does insiders own?

Around 0 Kezar Life Sciences, Inc. shares are held by insiders, which represents about 10.57% of KZR stock.

Who is the insider with the largest stake?

KZR 10 percent owner, Equal Talent Investments Ltd holds the largest portfolio of the company's shares. KZR shares owned by Equal total nearly 6.25 million.

Which institution holds the most shares in KZR?

SPHERA FUNDS MANAGEMENT LTD. is the largest institutional owner in KZR which holds 0 shares worth - or 0% of the total KZR shares outstanding followed by CITADEL ADVISORS LLC with ownership of 15.7 thousand shares representing 0.21% of the KZR ownership. BOOTHBAY FUND MANAGEMENT, LLC is the third largest stakeholder with 20.9 thousand shares or 0.29% of the ownership worth more than $81.51K.

Is Kezar Life Sciences, Inc. stock optionable?

Stock options give the owner the ability but not the obligation to buy or sell a security at a predetermined price and date. Stock options can be classified into two types: puts and calls. A put is a bet on falling stock, and a call is a bet on rising stock. As far as the KZR is concerned, it is a stock which is optionable.

Is there a short position on KZR's shares?

Number of KZR shares short is 588.61K. Shares short is a market sentiment in which investors have sold their shares short in a given stock but have not yet covered them or closed them out.

About how many outstanding KZR shares are there?

As of today, 7.32M shares of KZR are outstanding.

Is there many float in KZR stock?

Float represents the number of tradeable shares in a specific stock. By subtracting restricted and closely-held shares from a firm's total outstanding shares, we can calculate its floating stock. The term "closely-held shares" refers to shares held by employees, major shareholders, and company insiders. At present, KZR has 4.69M shares in float.

KZR short ratio: what is it?

Short ratio is calculated by dividing the number of short shares, short interest or bets that shareholders will sell short from the average daily volume. A higher ratio indicates longer times needed to repurchase borrowed shares (sold). The short ratio for KZR is 8.59.

Kezar Life Sciences (KZR) insider trading activity: Get Latest News Today

Stock Outstanding Shares

Making an investment decision in the stock market involves a certain amount of risk, so it's important to thoroughly review a company's stock before making any decisions. Stock float, number of short positions and outstanding shares are among the many factors an investor should take into account.

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares8.06

Short Percent Of Float8.23

Shares Outstanding7.32M

Shares Float4.69M

Shares Short588.61K

Short Ratio8.59

8.23%

Short % of Float

8.06%

Short % of Shares Outstanding

Market Insider

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

10.57% Percentage of Shares held by All Insiders

61.12% Percentage of Shares held by All Institutions

68.35% Percentage of Float held by Institutions

Number of Institutions Holding Shares

Institutional Ownership

About 61.12% of KZR shares are held by financial institutions. SPHERA FUNDS MANAGEMENT LTD. is the top corporate investor, holding 0 shares valued at -. A 0% stake in Kezar Life Sciences, Inc. is owned by the company. CITADEL ADVISORS LLC owns 15.7K shares valued at $61.23K, which translates its holding of 0.21% of the stake in the company.

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Sep 30, 2025	SPHERA FUNDS MANAGEMENT LTD.	0%	0	-	-58.54K	-100.00%
Sep 30, 2025	CITADEL ADVISORS LLC	0.21%	15.7K	61.23K	15.7K	+100.00%
Sep 30, 2025	BOOTHBAY FUND MANAGEMENT, LLC	0.29%	20.9K	81.51K	0	0
Sep 30, 2025	VANGUARD GROUP INC	3.67%	268.17K	1.05M	-8.06K	-2.92%
Sep 30, 2025	STONEPINE CAPITAL MANAGEMENT, LLC	5.24%	383.18K	1.49M	213.32K	+125.59%
Sep 30, 2025	SUVRETTA CAPITAL MANAGEMENT, LLC	9.8%	716.76K	2.8M	0	0
Sep 30, 2025	TANG CAPITAL MANAGEMENT LLC	9.85%	720K	2.81M	0	0
Sep 30, 2025	BML CAPITAL MANAGEMENT, LLC	9.86%	720.79K	2.81M	85.6K	+13.48%
Sep 30, 2025	STATE STREET CORP	0.29%	21.09K	82.26K	0	0
Sep 30, 2025	DIMENSIONAL FUND ADVISORS LP	0.32%	23.23K	90.6K	-6.74K	-22.49%
Sep 30, 2025	TWO SIGMA INVESTMENTS, LP	0.32%	23.68K	92.36K	-1.2K	-4.83%
Sep 30, 2025	RBF CAPITAL, LLC	0.39%	28.25K	110.19K	0	0
Sep 30, 2025	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.56%	41K	159.9K	0	0
Sep 30, 2025	BARCLAYS PLC	0%	1	4	1	+100.00%
Sep 30, 2025	CITIGROUP INC	0%	51	199	0	0
Sep 30, 2025	ADVISOR GROUP HOLDINGS, INC.	0%	90	323	0	0
Sep 30, 2025	BNP PARIBAS ARBITRAGE, SNC	0%	96	374	0	0
Sep 30, 2025	CIBC PRIVATE WEALTH GROUP, LLC	0%	100	390	0	0
Sep 30, 2025	AVIDITY PARTNERS MANAGEMENT LP	0%	0	-	-502.6K	-100.00%
Sep 30, 2025	MILLENNIUM MANAGEMENT LLC	0%	0	-	-25.68K	-100.00%
Sep 30, 2025	TWO SIGMA ADVISERS, LP	0.74%	54.26K	211.62K	-380	-0.70%
Sep 30, 2025	GEODE CAPITAL MANAGEMENT, LLC	0.9%	65.5K	255.52K	383	+0.59%
Sep 30, 2025	SHAY CAPITAL LLC	0.93%	67.66K	263.88K	0	0
Sep 30, 2025	BLACKROCK, INC.	1.34%	98.1K	382.6K	432	+0.44%
Sep 30, 2025	IKARIAN CAPITAL, LLC	1.46%	106.9K	416.91K	0	0
Sep 30, 2025	BANK OF AMERICA CORP /DE/	0%	121	472	-59	-32.78%
Sep 30, 2025	JPMORGAN CHASE & CO	0%	209	815	0	0
Sep 30, 2025	UBS GROUP AG	0%	356	1.39K	315	+768.29%
Sep 30, 2025	GLOBAL RETIREMENT PARTNERS, LLC	0.01%	1K	3.9K	0	0
Sep 30, 2025	TOWER RESEARCH CAPITAL LLC (TRC)	0.02%	1.19K	4.63K	1.04K	+718.62%
Sep 30, 2025	WELLS FARGO & COMPANY/MN	0.08%	5.85K	22.8K	100	+1.74%
Sep 30, 2025	MORGAN STANLEY	0.11%	7.82K	30.5K	-873	-10.04%
Sep 30, 2025	FMR LLC	0.12%	8.73K	34.06K	-13.93K	-61.47%
Sep 30, 2025	LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	0.18%	13.04K	50.86K	13.04K	+100.00%
Sep 30, 2025	RENAISSANCE TECHNOLOGIES LLC	1.59%	115.89K	451.95K	28.6K	+32.77%
Sep 30, 2025	ADAR1 CAPITAL MANAGEMENT, LLC	1.71%	124.97K	487.37K	-22.44K	-15.22%
Sep 30, 2025	PEAPOD LANE CAPITAL LLC	1.72%	125.77K	490.54K	10.65K	+9.25%
Sep 30, 2025	ACADIAN ASSET MANAGEMENT LLC	1.83%	133.53K	519K	0	0
Sep 30, 2025	ORBIMED ADVISORS LLC	2.64%	192.7K	751.53K	0	0
Sep 30, 2025	QIMING U.S. VENTURES MANAGEMENT, LLC	1.13%	82.87K	323.2K	0	0
Sep 30, 2025	NORTHERN TRUST CORP	0.19%	13.94K	54.37K	0	0
Jun 30, 2025	PEAPOD LANE CAPITAL LLC	1.57%	115.12K	527.28K	-9.3K	-7.48%
Jun 30, 2025	GOLDMAN SACHS GROUP INC	0%	0	-	-28.18K	-100.00%
Jun 30, 2025	VANGUARD GROUP INC	3.78%	276.23K	1.27M	0	0
Jun 30, 2025	WOODLINE PARTNERS LP	0%	0	-	-25.56K	-100.00%
Jun 30, 2025	MILLENNIUM MANAGEMENT LLC	0.35%	25.68K	117.6K	-5.7K	-18.17%
Jun 30, 2025	TOWER RESEARCH CAPITAL LLC (TRC)	0%	145	664	145	+100.00%
Jun 30, 2025	BANK OF AMERICA CORP /DE/	0%	180	824	8	+4.65%
Jun 30, 2025	RBF CAPITAL, LLC	0.39%	28.25K	129.4K	0	0
Jun 30, 2025	DIMENSIONAL FUND ADVISORS LP	0.41%	29.97K	137.26K	-2.34K	-7.24%
Jun 30, 2025	RENAISSANCE TECHNOLOGIES LLC	1.19%	87.28K	399.76K	1.7K	+1.99%
Jun 30, 2025	ACADIAN ASSET MANAGEMENT LLC	1.83%	133.53K	610K	0	0
Jun 30, 2025	FMR LLC	0.31%	22.67K	103.81K	8.36K	+58.44%
Jun 30, 2025	QIMING U.S. VENTURES MANAGEMENT, LLC	1.13%	82.87K	379.55K	0	0
Jun 30, 2025	SHAY CAPITAL LLC	0.93%	67.66K	309.89K	150	+0.22%
Jun 30, 2025	IKARIAN CAPITAL, LLC	1.46%	106.9K	489.61K	0	0
Jun 30, 2025		1.57%	115.12K	527.28K	-9.3K	-7.48%
Jun 30, 2025	CLEAR HARBOR ASSET MANAGEMENT, LLC	0%	0	-	-15.81K	-100.00%
Jun 30, 2025	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0%	0	-	-11.8K	-100.00%
Jun 30, 2025	JPMORGAN CHASE & CO	0%	209	957	43	+25.90%
Jun 30, 2025	ADVISOR GROUP HOLDINGS, INC.	0%	90	412	86	+2,150.00%
Jun 30, 2025	WELLS FARGO & COMPANY/MN	0.08%	5.75K	26.32K	43	+0.75%
Jun 30, 2025	NORTHERN TRUST CORP	0.19%	13.94K	63.85K	0	0
Jun 30, 2025	BOOTHBAY FUND MANAGEMENT, LLC	0.29%	20.9K	95.72K	0	0
Jun 30, 2025	TWO SIGMA INVESTMENTS, LP	0.34%	24.88K	113.96K	-6.99K	-21.92%
Jun 30, 2025	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.56%	41K	187.78K	0	0
Jun 30, 2025	TWO SIGMA ADVISERS, LP	0.75%	54.64K	250.26K	-9.87K	-15.30%
Jun 30, 2025	SPHERA FUNDS MANAGEMENT LTD.	0.8%	58.54K	268.11K	-49.93K	-46.03%
Jun 30, 2025	GEODE CAPITAL MANAGEMENT, LLC	0.89%	65.12K	298.31K	-2.45K	-3.62%
Jun 30, 2025	BLACKROCK, INC.	1.34%	97.67K	447.33K	15.06K	+18.23%
Jun 30, 2025	ADAR1 CAPITAL MANAGEMENT, LLC	2.02%	147.4K	675.11K	0	0
Jun 30, 2025	ORBIMED ADVISORS LLC	2.64%	192.7K	882.57K	0	0
Jun 30, 2025	SQUAREPOINT OPS LLC	0%	0	-	-20.3K	-100.00%
Jun 30, 2025	CIBC PRIVATE WEALTH GROUP, LLC	0%	100	458	0	0
Jun 30, 2025	GLOBAL RETIREMENT PARTNERS, LLC	0.01%	1K	4.58K	1K	+100.00%
Jun 30, 2025	MORGAN STANLEY	0.12%	8.69K	39.82M	1.48K	+20.55%
Jun 30, 2025	STONEPINE CAPITAL MANAGEMENT, LLC	2.32%	169.86K	777.95K	69.86K	+69.86%
Jun 30, 2025	AVIDITY PARTNERS MANAGEMENT LP	6.87%	502.6K	2.3M	0	0
Jun 30, 2025	BML CAPITAL MANAGEMENT, LLC	8.69%	635.18K	2.91M	227.05K	+55.63%
Jun 30, 2025	SUVRETTA CAPITAL MANAGEMENT, LLC	9.8%	716.76K	3.28M	0	0
Jun 30, 2025	TANG CAPITAL MANAGEMENT LLC	9.85%	720K	3.3M	0	0
Jun 30, 2025	CITIGROUP INC	0%	51	234	0	0
Jun 30, 2025	UBS GROUP AG	0%	41	188	-2K	-97.99%
Jun 30, 2025	BNP PARIBAS ARBITRAGE, SNC	0%	96	440	0	0
Jun 30, 2025	STATE STREET CORP	0.29%	21.09K	96.61K	0	0
Mar 31, 2025	CLEAR HARBOR ASSET MANAGEMENT, LLC	0.22%	15.81K	77.13K	15.81K	+100.00%
Mar 31, 2025	AVIDITY PARTNERS MANAGEMENT LP	6.88%	502.6K	2.45M	0	0
Mar 31, 2025	GEODE CAPITAL MANAGEMENT, LLC	0.92%	67.56K	329.79K	994	+1.49%
Mar 31, 2025	SHAY CAPITAL LLC	0.92%	67.51K	329.45K	8.35K	+14.12%
Mar 31, 2025	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.16%	11.8K	57.58K	-400	-3.28%
Mar 31, 2025	TANG CAPITAL MANAGEMENT LLC	9.86%	720K	3.51M	0	0
Mar 31, 2025	RENAISSANCE TECHNOLOGIES LLC	1.17%	85.58K	417.65K	-2.1K	-2.40%
Mar 31, 2025	BML CAPITAL MANAGEMENT, LLC	5.59%	408.14K	1.99M	359.47K	+738.62%
Mar 31, 2025	VANGUARD GROUP INC	3.78%	276.23K	1.35M	2.12K	+0.77%
Mar 31, 2025	ORBIMED ADVISORS LLC	2.64%	192.7K	940.38K	0	0
Mar 31, 2025	MORGAN STANLEY	0.1%	7.21K	35.19K	-13.4K	-65.01%
Mar 31, 2025	ACADIAN ASSET MANAGEMENT LLC	1.83%	133.53K	650K	-12.14K	-8.33%
Mar 31, 2025	SPHERA FUNDS MANAGEMENT LTD.	1.48%	108.47K	529.35K	0	0
Mar 31, 2025	IKARIAN CAPITAL, LLC	1.46%	106.9K	521.68K	0	0
Mar 31, 2025	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.56%	41K	200.08K	41K	+100.00%
Mar 31, 2025	DIMENSIONAL FUND ADVISORS LP	0.44%	32.31K	157.67K	0	0
Mar 31, 2025	TWO SIGMA INVESTMENTS, LP	0.44%	31.87K	155.53K	-30.11K	-48.58%
Mar 31, 2025	MILLENNIUM MANAGEMENT LLC	0.43%	31.38K	153.13K	-11.96K	-27.59%
Mar 31, 2025	AMUNDI	0%	0	-	-8.22K	-100.00%
Mar 31, 2025	CITADEL ADVISORS LLC	0%	0	-	-270	-100.00%
Mar 31, 2025	SIMPLEX TRADING, LLC	0%	0	-	-400	-100.00%
Mar 31, 2025	TWO SIGMA ADVISERS, LP	0.88%	64.51K	314.8K	-35.63K	-35.58%
Mar 31, 2025	RBF CAPITAL, LLC	0.39%	28.25K	137.88K	0	0
Mar 31, 2025	GOLDMAN SACHS GROUP INC	0.39%	28.18K	137.51K	-24.09K	-46.09%
Mar 31, 2025	WOODLINE PARTNERS LP	0.35%	25.56K	124.71K	25.56K	+100.00%
Mar 31, 2025	BOOTHBAY FUND MANAGEMENT, LLC	0.29%	20.9K	101.99K	0	0
Mar 31, 2025	SQUAREPOINT OPS LLC	0.28%	20.3K	99.06K	20.3K	+100.00%
Mar 31, 2025	FMR LLC	0.2%	14.31K	69.81K	5.9K	+70.28%
Mar 31, 2025	NORTHERN TRUST CORP	0.19%	13.94K	68.03K	0	0
Mar 31, 2025	WELLS FARGO & COMPANY/MN	0.08%	5.7K	27.83K	-474	-7.67%
Mar 31, 2025	UBS GROUP AG	0.03%	2.04K	9.96K	-12.8K	-86.25%
Mar 31, 2025	BANK OF AMERICA CORP /DE/	0%	172	839	2	+1.18%
Mar 31, 2025	JPMORGAN CHASE & CO	0%	166	810	-11.72K	-98.60%
Mar 31, 2025	CIBC PRIVATE WEALTH GROUP, LLC	0%	100	402	100	+100.00%
Mar 31, 2025	CITIGROUP INC	0%	51	249	0	0
Mar 31, 2025	MARQUETTE ASSET MANAGEMENT, LLC	0%	0	-	-17.81K	-100.00%
Mar 31, 2025	TOWER RESEARCH CAPITAL LLC (TRC)	0%	0	-	-1.04K	-100.00%
Mar 31, 2025	AFFINITY ASSET ADVISORS, LLC	0%	0	-	-142.32K	-100.00%
Mar 31, 2025	BNP PARIBAS ARBITRAGE, SNC	0%	96	468	-13	-11.93%
Mar 31, 2025	STONEPINE CAPITAL MANAGEMENT, LLC	1.37%	100K	488K	-10K	-9.09%
Mar 31, 2025	SUVRETTA CAPITAL MANAGEMENT, LLC	9.81%	716.76K	3.5M	0	0
Mar 31, 2025	BLACKROCK, INC.	1.13%	82.61K	403.16K	-241	-0.29%
Mar 31, 2025	ADVISOR GROUP HOLDINGS, INC.	0%	0	-	-3.69K	-100.00%
Mar 31, 2025	ADAR1 CAPITAL MANAGEMENT, LLC	2.02%	147.4K	719.33K	0	0
Mar 31, 2025		1.7%	124.43K	607.2K	433	+0.35%
Mar 31, 2025	STATE STREET CORP	0.29%	21.09K	102.93K	0	0
Mar 31, 2025	QIMING U.S. VENTURES MANAGEMENT, LLC	1.14%	82.87K	404.41K	0	0
Mar 31, 2024	AVANTAX ADVISORY SERVICES, INC.	0.02%	11.11K	10.02K	11.11K	+100.00%
Mar 31, 2024	FIRST BANK & TRUST	0.02%	11.74K	10.58K	11.74K	+100.00%
Mar 31, 2024	PROSHARE ADVISORS LLC	0.02%	12.82K	11.56K	1.01K	+8.55%
Mar 31, 2024	RETIREMENT CAPITAL STRATEGIES	0.02%	15K	13.52K	0	0
Mar 31, 2024	PRELUDE CAPITAL MANAGEMENT, LLC	0.14%	100.8K	90.88K	100.8K	+100.00%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.12%	89.7K	80.87K	-6.12K	-6.38%
Mar 31, 2024	AMUNDI	0.11%	82.24K	64.78K	0	0
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.11%	79.06K	71.28K	0	0
Mar 31, 2024	AVIDITY PARTNERS MANAGEMENT LP	6.93%	5.03M	4.53M	546	+0.01%
Mar 31, 2024	SPHERA FUNDS MANAGEMENT LTD.	2.83%	2.05M	1.85M	0	0
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	1.89%	1.37M	1.24M	19.04K	+1.41%
Mar 31, 2024	RENAISSANCE TECHNOLOGIES LLC	1.84%	1.34M	1.21M	46.16K	+3.57%
Mar 31, 2024	TWO SIGMA INVESTMENTS, LP	1.79%	1.3M	1.17M	86.01K	+7.07%
Mar 31, 2024	TWO SIGMA ADVISERS, LP	1.7%	1.23M	1.11M	-90.5K	-6.84%
Mar 31, 2024	IKARIAN CAPITAL, LLC	1.2%	868.99K	783.48K	15.6K	+1.83%
Mar 31, 2024	QIMING U.S. VENTURES MANAGEMENT, LLC	1.14%	828.71K	747.17K	0	0
Mar 31, 2024	MILLENNIUM MANAGEMENT LLC	1.13%	816.97K	736.58K	-2.11M	-72.09%
Mar 31, 2024	ACUITAS INVESTMENTS, LLC	0.95%	690.83K	622.85K	690.83K	+100.00%
Mar 31, 2024	TANG CAPITAL MANAGEMENT LLC	0.95%	688.94K	621.15K	382.28K	+124.66%
Mar 31, 2024	NORTHERN TRUST CORP	0.71%	515.36K	464.65K	-28.1K	-5.17%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.3%	214.26K	193.18K	-7.95K	-3.58%
Mar 31, 2024	BOOTHBAY FUND MANAGEMENT, LLC	0.21%	150.49K	135.68K	15.6K	+11.57%
Mar 31, 2024	MORGAN STANLEY	0.14%	101.15K	91.2K	-158.13K	-60.99%
Mar 31, 2024	PANAGORA ASSET MANAGEMENT INC	0.32%	233.21K	210.26K	149.12K	+177.34%
Mar 31, 2024	CITADEL ADVISORS LLC	0.7%	509.56K	459.42K	144.24K	+39.48%
Mar 31, 2024	D. E. SHAW & CO., INC.	0.58%	419.43K	378.15K	42.45K	+11.26%
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.56%	404.71K	364.88K	-38.02K	-8.59%
Mar 31, 2024	SCHRODER INVESTMENT MANAGEMENT GROUP	0.48%	350.39K	315.92K	0	0
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.43%	314.76K	283.79K	0	0
Mar 31, 2024	MARQUETTE ASSET MANAGEMENT, LLC	0.17%	126.1K	113.69K	126.1K	+100.00%
Mar 31, 2024	RHUMBLINE ADVISERS	0.15%	109.44K	98.7K	2.58K	+2.41%
Mar 31, 2024	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.15%	108.6K	97.91K	-50K	-31.53%
Mar 31, 2024	UBS GROUP AG	0.1%	71.51K	64.5K	22.34K	+45.42%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.07%	53.32K	48.07K	-32.09K	-37.57%
Mar 31, 2024	JACOBS LEVY EQUITY MANAGEMENT, INC	0.07%	53.22K	47.98K	-917.62K	-94.52%
Mar 31, 2024	BARCLAYS PLC	0.07%	50.12K	45K	-47.92K	-48.88%
Mar 31, 2024	PRICE T ROWE ASSOCIATES INC /MD/	0.07%	47.67K	43K	1.33K	+2.86%
Mar 31, 2024	AMERICAN INTERNATIONAL GROUP, INC.	0.05%	35.17K	31.71K	-301	-0.85%
Mar 31, 2024	BANK OF AMERICA CORP /DE/	0.05%	33.25K	29.96K	-55.99K	-62.74%
Mar 31, 2024	OCCUDO QUANTITATIVE STRATEGIES LP	0.04%	31.77K	28.64K	-2.53K	-7.36%
Mar 31, 2024	JPMORGAN CHASE & CO	0.04%	30.46K	27.47K	-15.8K	-34.14%
Mar 31, 2024	SUVRETTA CAPITAL MANAGEMENT, LLC	9.88%	7.17M	6.46M	0	0
Mar 31, 2024	ORBIMED ADVISORS LLC	2.66%	1.93M	1.74M	0	0
Mar 31, 2024	CITIGROUP INC	0.02%	15.6K	14.06K	4.83K	+44.85%
Mar 31, 2024	DIVERSIFIED TRUST CO	0.02%	16.13K	14.54K	0	0
Mar 31, 2024	FIDELIS CAPITAL PARTNERS, LLC	0.04%	27.27K	24.58K	27.27K	+100.00%
Mar 31, 2024	XTX TOPCO LTD	0.02%	16.72K	15.08K	-27.3K	-62.01%
Mar 31, 2024	MANUFACTURERS LIFE INSURANCE COMPANY, THE	0.02%	17.7K	15.96K	-96	-0.54%
Mar 31, 2024	PRUDENTIAL FINANCIAL INC	0.03%	18.98K	17.08K	0	0
Mar 31, 2024	INVESCO LTD.	0.03%	19.48K	17.56K	-1.24K	-5.96%
Mar 31, 2024	PRINCIPAL FINANCIAL GROUP INC	0.03%	21.97K	19.8K	-5.14K	-18.97%
Mar 31, 2024	FMR LLC	0.03%	22.09K	19.92K	3.58K	+19.31%
Mar 31, 2024	FEDERATED HERMES, INC.	0.03%	23.48K	21.17K	3.06K	+15.00%
Mar 31, 2024	NEW YORK STATE COMMON RETIREMENT FUND	0.03%	23.75K	21K	0	0
Mar 31, 2024	SG AMERICAS SECURITIES, LLC	0.03%	24.62K	22K	-19.33K	-43.98%
Mar 31, 2024	AFFINITY ASSET ADVISORS, LLC	2.43%	1.76M	1.59M	1.76M	+100.00%
Mar 31, 2024	ACADIAN ASSET MANAGEMENT LLC	2.47%	1.79M	1.61M	534.2K	+42.51%
Mar 31, 2024	VANGUARD GROUP INC	4.26%	3.09M	2.79M	30.74K	+1.00%
Mar 31, 2024	BLACKROCK INC.	6.36%	4.62M	4.16M	-200.28K	-4.16%
Mar 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0.38%	273.43K	246.52K	71.54K	+35.44%
Mar 31, 2024	DEUTSCHE BANK AG\	0.38%	279.27K	251.34K	0	0
Mar 31, 2024	PROSIGHT MANAGEMENT, LP	1.33%	963.6K	868.78K	-2.4M	-71.37%
Mar 31, 2024	STATE STREET CORP	1.55%	1.12M	1.01M	7.72K	+0.69%
Mar 31, 2024	GSA CAPITAL PARTNERS LLP	0.39%	282.6K	255K	22.19K	+8.52%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.31%	226.49K	204.2K	0	0
Mar 31, 2024	ADAR1 CAPITAL MANAGEMENT, LLC	0.33%	236.62K	213.34K	236.62K	+100.00%
Mar 31, 2024	NISA INVESTMENT ADVISORS, LLC	0%	50	45	0	0
Mar 31, 2024	ADVISOR GROUP HOLDINGS, INC.	0%	75	68	-60	-44.44%
Mar 31, 2024	CIBC PRIVATE WEALTH GROUP, LLC	0%	1K	920	1K	+100.00%
Mar 31, 2024	CAPITAL ADVISORS, LTD. LLC	0%	1.61K	1K	1.61K	+100.00%
Mar 31, 2024	AMALGAMATED BANK	0%	1.63K	1K	-4.89K	-75.00%
Mar 31, 2024	CUTLER GROUP LLC / CA	0%	2.4K	2K	0	0
Mar 31, 2024	AMERITAS INVESTMENT PARTNERS, INC.	0.01%	4.13K	3.72M	0	0
Mar 31, 2024	LEGAL & GENERAL GROUP PLC	0.01%	6.81K	6.14M	0	0
Mar 31, 2024	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.04%	26.2K	84.09K	26.2K	+100.00%
Mar 31, 2024	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	0.01%	10.14K	31.73K	-8.4K	-45.31%
Dec 31, 2023	AMUNDI	0.11%	82.24K	74.84K	82.24K	+100.00%
Dec 31, 2023	SQUAREPOINT OPS LLC	0.26%	186.71K	176.88K	33.78K	+22.09%
Dec 31, 2023	BNP PARIBAS ARBITRAGE, SNC	0.28%	201.89K	191.27K	118.09K	+140.92%
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.31%	222.22K	210.53K	-41.62K	-15.78%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.31%	226.49K	214.58K	-118.95K	-34.43%
Dec 31, 2023	MORGAN STANLEY	0.36%	259.28K	245.64K	124.46K	+92.31%
Dec 31, 2023	GSA CAPITAL PARTNERS LLP	0.36%	260.41K	247K	260.41K	+100.00%
Dec 31, 2023	DEUTSCHE BANK AG\	0.38%	279.27K	265.3K	233.23K	+506.58%
Dec 31, 2023	TANG CAPITAL MANAGEMENT LLC	0.42%	306.67K	290.53K	306.67K	+100.00%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.43%	314.76K	298.21K	1.2K	+0.38%
Dec 31, 2023	SCHRODER INVESTMENT MANAGEMENT GROUP	0.48%	350.39K	331.96K	350.39K	+100.00%
Dec 31, 2023	CITADEL ADVISORS LLC	0.14%	100.4K	95.12K	1.6K	+1.62%
Dec 31, 2023	D. E. SHAW & CO., INC.	0.52%	376.98K	357.15K	333.3K	+763.14%
Dec 31, 2023	ANSON FUNDS MANAGEMENT LP	0.84%	611.25K	579.1K	611.25K	+100.00%
Dec 31, 2023	QIMING U.S. VENTURES MANAGEMENT, LLC	1.14%	828.71K	785.12K	0	0
Dec 31, 2023	IKARIAN CAPITAL, LLC	1.17%	853.39K	808.5K	0	0
Dec 31, 2023	JACOBS LEVY EQUITY MANAGEMENT, INC	1.34%	970.84K	919.77K	662.26K	+214.62%
Dec 31, 2023	STATE STREET CORP	1.54%	1.12M	1.06M	3.49K	+0.31%
Dec 31, 2023	GOLDMAN SACHS GROUP INC	0.61%	442.72K	419.43K	-942.29K	-68.03%
Dec 31, 2023	NORTHERN TRUST CORP	0.75%	543.47K	514.88K	-26.32K	-4.62%
Dec 31, 2023	TWO SIGMA INVESTMENTS, LP	1.67%	1.22M	1.15M	537.81K	+79.27%
Dec 31, 2023	ACADIAN ASSET MANAGEMENT LLC	1.73%	1.26M	1.19M	424.94K	+51.09%
Dec 31, 2023	RENAISSANCE TECHNOLOGIES LLC	1.78%	1.29M	1.22M	683.22K	+112.24%
Dec 31, 2023	TWO SIGMA ADVISERS, LP	1.82%	1.32M	1.25M	652.4K	+97.39%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	1.86%	1.35M	1.28M	62.03K	+4.80%
Dec 31, 2023	GRANAHAN INVESTMENT MANAGEMENT, LLC	2.62%	1.91M	1.81M	453.62K	+31.23%
Dec 31, 2023	ORBIMED ADVISORS LLC	2.65%	1.93M	1.83M	-3.54M	-64.73%
Dec 31, 2023	SPHERA FUNDS MANAGEMENT LTD.	2.82%	2.05M	1.94M	0	0
Dec 31, 2023	MILLENNIUM MANAGEMENT LLC	4.03%	2.93M	2.77M	-474.55K	-13.95%
Dec 31, 2023	VANGUARD GROUP INC	4.21%	3.06M	2.9M	22.92K	+0.75%
Dec 31, 2023	PROSIGHT MANAGEMENT, LP	4.63%	3.37M	3.19M	-1.41M	-29.46%
Dec 31, 2023	BLACKROCK INC.	6.63%	4.82M	4.56M	-135.02K	-2.73%
Dec 31, 2023	AVIDITY PARTNERS MANAGEMENT LP	6.91%	5.03M	4.76M	-985.65K	-16.40%
Dec 31, 2023	SUVRETTA CAPITAL MANAGEMENT, LLC	9.86%	7.17M	6.79M	0	0
Dec 31, 2023	JPMORGAN CHASE & CO	0.06%	46.26K	43.83K	-912.36K	-95.17%
Dec 31, 2023	PRICE T ROWE ASSOCIATES INC /MD/	0.06%	46.35K	44K	0	0
Dec 31, 2023	UBS GROUP AG	0.07%	49.17K	46.57K	15.02K	+43.98%
Dec 31, 2023	ENGINEERS GATE MANAGER LP	0.08%	56.83K	53.84K	43.32K	+320.72%
Dec 31, 2023	PALE FIRE CAPITAL SE	0.09%	68.85K	65.23K	0	0
Dec 31, 2023	JANE STREET GROUP, LLC	0.1%	69.43K	65.78K	69.43K	+100.00%
Dec 31, 2023	ALLIANCEBERNSTEIN L.P.	0.11%	79.06K	74.9K	-8.6K	-9.81%
Dec 31, 2023	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.22%	158.6K	150.26K	-151.5K	-48.86%
Dec 31, 2023	PANAGORA ASSET MANAGEMENT INC	0.12%	84.09K	79.66K	84.09K	+100.00%
Dec 31, 2023	BANK OF AMERICA CORP /DE/	0.12%	89.24K	84.51K	24.82K	+38.53%
Dec 31, 2023	WELLS FARGO & COMPANY/MN	0.13%	95.82K	90.78K	-20.67K	-17.74%
Dec 31, 2023	BARCLAYS PLC	0.13%	98.04K	93K	85.45K	+678.57%
Dec 31, 2023	HRT FINANCIAL LP	0.14%	103.79K	98K	103.79K	+100.00%
Dec 31, 2023	RHUMBLINE ADVISERS	0.15%	106.86K	101.18K	0	0
Dec 31, 2023	BOOTHBAY FUND MANAGEMENT, LLC	0.19%	134.88K	127.79K	0	0

Insiders

Among the KZR insiders holding of 10.57% of the stake in company, EQUAL TALENT INVESTMENTS LTD, 10 percent owner, holds the largest shares of 6.25M. MORNINGSIDE VENTURE INVESTMENTS LTD, 10 percent owner, is the second largest KZR insider with ownership of 5.45M shares. CORMORANT ASSET MANAGEMENT, LP, 10 percent owner, stands third with possession of 1.57M shares of that stake.

Insiders	Designation	Shares Held
EQUAL TALENT INVESTMENTS LTD	10 percent owner	6.25M
MORNINGSIDE VENTURE INVESTMENTS LTD	10 percent owner	5.45M
CORMORANT ASSET MANAGEMENT, LP	10 percent owner	1.57M
BERGER FRANKLIN M	director	825.69K
BAY CITY CAPITAL LLC	10 percent owner	622.23K
KIRK CHRISTOPHER J.	President and CSO	342.61K
KAUFFMAN MICHAEL	director	63.69K
FOWLER JOHN FRANKLIN	CEO	38.46K
BELSKY MARC	CFO	15.38K
ECONOMIDES VASSILIKI	SVP, Strategy & External Aff.	7.57K
SCHILLER MARK C.	Chief Operating Officer	2.74K
CHIANG PICHI LUO	SVP, Corporate Controller	2.71K

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Jul 02, 2025	SCHILLER MARK C.	SALE	4.28	561	2.4K	2.74K
Jul 02, 2025	CHIANG PICHI LUO	SALE	4.28	264	1.13K	2.71K
Jul 02, 2024	SCHILLER MARK C.	SALE	0.58	6.69K	3.88K	33.01K
Feb 06, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.88	40K	275.32K	5.45M
Feb 03, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.15	25K	178.65K	5.49M
Feb 02, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.19	50K	359.5K	5.51M
Feb 01, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.95	40K	278K	5.56M
Jan 31, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.08	30K	212.4K	5.6M
Jan 30, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.91	30K	207.3K	5.63M
Jan 25, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.85	50K	342.5K	5.66M
Jan 24, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.98	80K	558.4K	5.71M
Jan 23, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.81	80K	544.8K	5.79M
Jan 17, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.79	6.11K	41.51K	5.87M
Jan 13, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.15	1.97K	14.09K	5.88M
Jan 12, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.77	5K	33.85K	5.88M
Jan 06, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.89	3K	20.67K	5.89M
Jan 05, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	6.97	12.16K	84.77K	5.89M
Jan 04, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.17	30K	215.1K	5.9M
Jan 03, 2023	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.10	500	3.55K	5.93M
Dec 29, 2022	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	7.10	25K	177.5K	5.93M
Oct 04, 2022	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	8.82	3.61K	31.86K	6.08M
Oct 03, 2022	MORNINGSIDE VENTURE INVESTMENTS LTD	SALE	8.78	28.7K	251.96K	6.08M
Mar 18, 2022	BERGER FRANKLIN M	PURCHASE	15.96	15K	239.4K	825.69K
Jan 03, 2022	KAUFFMAN MICHAEL	SALE	16.45	5K	82.25K	63.69K
Jun 11, 2020	EQUAL TALENT INVESTMENTS LTD	PURCHASE	5.50	1.45M	8M	6.25M
Jun 11, 2020	BERGER FRANKLIN M	PURCHASE	5.50	100K	550K	784K
Feb 04, 2020	FOWLER JOHN FRANKLIN	PURCHASE	2.60	38.46K	100K	38.46K
Feb 04, 2020	KIRK CHRISTOPHER J.	PURCHASE	2.60	38.46K	100K	342.61K
Feb 04, 2020	MORNINGSIDE VENTURE INVESTMENTS LTD	PURCHASE	2.60	3.8M	9.88M	6.11M
Feb 04, 2020	BELSKY MARC	PURCHASE	2.60	15.38K	40K	15.38K
Feb 04, 2020	ECONOMIDES VASSILIKI	PURCHASE	2.60	5.77K	15K	7.57K
Feb 04, 2020	BERGER FRANKLIN M	PURCHASE	2.60	120.85K	314.2K	684K
Nov 13, 2019	BELSKY MARC	PURCHASE	2.76	800	2.21K	2K
Oct 10, 2019	FOWLER JOHN FRANKLIN	PURCHASE	3.24	1K	3.24K	296.95K
Aug 20, 2019	BELSKY MARC	PURCHASE	4.42	200	884	1.2K
Aug 20, 2019	ECONOMIDES VASSILIKI	PURCHASE	4.41	350	1.54K	1.8K
Aug 13, 2019	FOWLER JOHN FRANKLIN	PURCHASE	4.66	2K	9.31K	295.95K
Aug 13, 2019	KIRK CHRISTOPHER J.	PURCHASE	4.61	5K	23.04K	302.93K
Aug 09, 2019	FOWLER JOHN FRANKLIN	PURCHASE	5.25	500	2.63K	293.2K
Aug 09, 2019	KIRK CHRISTOPHER J.	PURCHASE	4.97	5K	24.83K	297.93K
Aug 09, 2019	BELSKY MARC	PURCHASE	4.82	500	2.41K	1K
Aug 09, 2019	ECONOMIDES VASSILIKI	PURCHASE	4.96	1.02K	5.06K	1.45K
Jul 26, 2019	BELSKY MARC	PURCHASE	5.80	56	324.8	500
Jul 25, 2019	BELSKY MARC	PURCHASE	5.65	444	2.51K	444
Jul 22, 2019	ECONOMIDES VASSILIKI	PURCHASE	5.82	431	2.51K	431
May 30, 2019	ECONOMIDES VASSILIKI	PURCHASE	10.19	750	7.64K	11.32K
Jun 25, 2018	BAY CITY CAPITAL LLC	PURCHASE	15.00	150K	2.25M	622.23K
Jun 25, 2018	BERGER FRANKLIN M	PURCHASE	15.00	50K	750K	563.16K
Jun 25, 2018	MORNINGSIDE VENTURE INVESTMENTS LTD	PURCHASE	15.00	250K	3.75M	2.31M
Jun 25, 2018	CORMORANT ASSET MANAGEMENT, LP	PURCHASE	15.00	250K	3.75M	1.57M

Frequently Asked Questions