How many institutions own MRNS 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 MRNS shares is 108, representing 83.04% of the company's common stock.

Who are the major shareholders selling Marinus Pharmaceuticals, Inc. stock?

QUBE RESEARCH & TECHNOLOGIES LTD, in the last quarter, reduced its stake in MRNS by -61.66% restricting it's holding to 12.9 thousand shares of worth nearly $6.90K. TANG CAPITAL MANAGEMENT LLC also lessened -65.07% of the MRNS shares from its portfolio, reducing its holding to 1.64 million shares of worth $878.61K. FEDERATED HERMES, INC. also shunned MRNS shares holding by -38.88% last quarter which brought its holding to 2.29 thousand shares worth $1.22K.

Investors who are buying MRNS stock?

As per its latest 13F filing, ADVISOR GROUP HOLDINGS, INC. increased its stake in MRNS by 100% in the last quarter. The institutional holder raised its holding to 6 thousand shares having worth more than $3.24K. DELTEC ASSET MANAGEMENT LLC also added 100% more shares of MRNS to its portfolio, raising its holding to 200 thousand shares of worth $107.02K. ROYAL BANK OF CANADA also increased its MRNS shares holding by 303.42% which brought its holding to 249.14 thousand shares worth $134.00K.

MRNS's major insiders: who are they?

The insider with the most stakes in MRNS is Bain Capital Life Sciences Investors, LLC , 10 percent owner at the company. Additionally, MRNS stock is highly held by 10 percent owner Domain Partners VI, L.P. and director Bloch Stephen M among others.

Did an insider recently sell MRNS stock?

Company executives, directors, and other insiders own 10.94% percent of Marinus Pharmaceuticals, Inc.'s stock. Within the last six months, there have been 0 transaction(s) in which MRNS insiders have sold stock, totaling 0 shares. Insiders that have sold shares include EZICKSON ELAN, JOHNSON MARVIN, and MANNING MARTHA E.

Which insider recently purchased MRNS stock?

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

How much of MRNS does insiders own?

Around 0 Marinus Pharmaceuticals, Inc. shares are held by insiders, which represents about 10.94% of MRNS stock.

Who is the insider with the largest stake?

MRNS 10 percent owner, Bain Capital Life Sciences Investors, LLC holds the largest portfolio of the company's shares. MRNS shares owned by Bain total nearly 3.98 million.

Which institution holds the most shares in MRNS?

ADVISOR GROUP HOLDINGS, INC. is the largest institutional owner in MRNS which holds 6 thousand shares worth $3.24K or 0.01% of the total MRNS shares outstanding followed by COPPELL ADVISORY SOLUTIONS LLC with ownership of 3.09 thousand shares representing 0.01% of the MRNS ownership. QUBE RESEARCH & TECHNOLOGIES LTD is the third largest stakeholder with 12.9 thousand shares or 0.02% of the ownership worth more than $6.90K.

Is Marinus Pharmaceuticals, 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 MRNS is concerned, it is a stock which is optionable.

Is there a short position on MRNS's shares?

Number of MRNS shares short is 5.66M. 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 MRNS shares are there?

As of today, 55.22M shares of MRNS are outstanding.

Is there many float in MRNS 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, MRNS has 37.39M shares in float.

MRNS 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 MRNS is 1.09.

Marinus Pharmaceuticals (MRNS) 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.

ShortableNo

OptionableYes

Short Percent Of Outstanding Shares10.28

Short Percent Of Float10.32

Shares Outstanding55.22M

Shares Float37.39M

Shares Short5.66M

Short Ratio1.09

10.32%

Short % of Float

10.28%

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

10.94% Percentage of Shares held by All Insiders

83.04% Percentage of Shares held by All Institutions

93.24% Percentage of Float held by Institutions

108

Number of Institutions Holding Shares

Institutional Ownership

About 83.04% of MRNS shares are held by financial institutions. ADVISOR GROUP HOLDINGS, INC. is the top corporate investor, holding 6K shares valued at $3.24K. A 0.01% stake in Marinus Pharmaceuticals, Inc. is owned by the company. COPPELL ADVISORY SOLUTIONS LLC owns 3.09K shares valued at $31.42K, which translates its holding of 0.01% of the stake in the company.

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Jun 30, 2025	ADVISOR GROUP HOLDINGS, INC.	0.01%	6K	3.24K	6K	+100.00%
Dec 31, 2024	COPPELL ADVISORY SOLUTIONS LLC	0.01%	3.09K	31.42K	0	0
Dec 31, 2024	QUBE RESEARCH & TECHNOLOGIES LTD	0.02%	12.9K	6.9K	-20.74K	-61.66%
Dec 31, 2024	DELTEC ASSET MANAGEMENT LLC	0.35%	200K	107.02K	200K	+100.00%
Dec 31, 2024	ROYAL BANK OF CANADA	0.44%	249.14K	134K	187.38K	+303.42%
Dec 31, 2024	TANG CAPITAL MANAGEMENT LLC	2.87%	1.64M	878.61K	-3.06M	-65.07%
Dec 31, 2024	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	4.71%	2.69M	1.44M	0	0
Dec 31, 2024	JPMORGAN CHASE & CO	0.85%	487.58K	260.91K	354.39K	+266.08%
Dec 31, 2024	GABELLI & CO INVESTMENT ADVISERS, INC.	0.17%	100K	53.51K	100K	+100.00%
Dec 31, 2024	FEDERATED HERMES, INC.	0%	2.29K	1.22K	-1.45K	-38.88%
Dec 31, 2024	ENGINEERS GATE MANAGER LP	0.03%	16.02K	8.57K	-13.46K	-45.65%
Dec 31, 2024	POINT72 ASIA (SINGAPORE) PTE. LTD.	0.04%	20.78K	11.12K	1.5K	+7.79%
Dec 31, 2024	BANK OF AMERICA CORP /DE/	0%	1.65K	885	-271.96K	-99.40%
Dec 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0%	1.32K	707	1.32K	+100.00%
Dec 31, 2024	HARVEST INVESTMENT SERVICES, LLC	0.07%	41.14K	22.02K	41.14K	+100.00%
Dec 31, 2024	COMMONWEALTH EQUITY SERVICES, LLC	0.02%	12.52K	7K	-100	-0.79%
Dec 31, 2024	VIRTU FINANCIAL LLC	0.12%	66.72K	36K	66.72K	+100.00%
Dec 31, 2024	UBS GROUP AG	0.45%	258.94K	138.54K	256.69K	+11,367.85%
Dec 31, 2024	GSA CAPITAL PARTNERS LLP	3.21%	1.84M	983K	820.86K	+80.74%
Dec 31, 2024	STATE STREET CORP	0.39%	222.58K	119.1K	16.1K	+7.80%
Dec 31, 2024	WOODLINE PARTNERS LP	4.08%	2.34M	1.25M	1.07M	+84.75%
Dec 31, 2024	ABRDN PLC	4.65%	2.66M	1.42M	0	0
Dec 31, 2024		4.72%	2.7M	1.44M	2.7M	+100.00%
Dec 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	0.92%	529.05K	283.21K	-39.46K	-6.94%
Dec 31, 2024	ACADIAN ASSET MANAGEMENT LLC	1.22%	696.74K	371K	-213.6K	-23.46%
Dec 31, 2024	MORGAN STANLEY	5.76%	3.3M	1.77M	3.13M	+1,898.71%
Dec 31, 2024	ODDO BHF ASSET MANAGEMENT SAS	4.72%	2.7M	1.44M	2.7M	+100.00%
Dec 31, 2024	1620 INVESTMENT ADVISORS, INC.	0%	1K	535	0	0
Dec 31, 2024	CITADEL ADVISORS LLC	0%	1.9K	1.02K	-32.6K	-94.49%
Dec 31, 2024	ADVISOR GROUP HOLDINGS, INC.	0.01%	6K	3.24K	-5K	-45.45%
Dec 31, 2024	GROUP ONE TRADING, L.P.	0.01%	6.31K	3.38K	-5.38K	-46.04%
Dec 31, 2024	PERFROMANCE WEALTH PARTNERS, LLC	0.02%	11K	5.89K	0	0
Dec 31, 2024	BERYL CAPITAL MANAGEMENT LLC	7.39%	4.23M	2.26M	4.23M	+100.00%
Dec 31, 2024	TWO SIGMA INVESTMENTS, LP	0.04%	22.87K	12.24K	-24.8K	-52.02%
Dec 31, 2024	TOWER RESEARCH CAPITAL LLC (TRC)	0.04%	23.2K	12.41K	9.43K	+68.54%
Dec 31, 2024	HRT FINANCIAL LP	0.05%	30.94K	16K	30.94K	+100.00%
Dec 31, 2024	GOLDMAN SACHS GROUP INC	0.09%	52.33K	28K	12.25K	+30.57%
Dec 31, 2024	MILLENNIUM MANAGEMENT LLC	0.42%	239.41K	128.11K	-243.09K	-50.38%
Dec 31, 2024	SCHRODER INVESTMENT MANAGEMENT GROUP	0.51%	290K	152.57K	0	0
Dec 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.18%	100.85K	53.97K	26.97K	+36.51%
Dec 31, 2024	SIMPLEX TRADING, LLC	0.02%	9.53K	5K	-44.11K	-82.24%
Dec 31, 2024	JACOBS LEVY EQUITY MANAGEMENT, INC	0.04%	20.36K	10.89K	-393.91K	-95.09%
Dec 31, 2024	BLACKROCK, INC.	1.54%	883.68K	472.85K	-975.53K	-52.47%
Dec 31, 2024	VANGUARD GROUP INC	4.54%	2.6M	1.39M	-206.2K	-7.36%
Dec 31, 2024	WELLS FARGO & COMPANY/MN	0%	1.8K	963	0	0
Dec 31, 2024	PRICE T ROWE ASSOCIATES INC /MD/	0.08%	44.2K	24K	0	0
Dec 31, 2024	ASSENAGON ASSET MANAGEMENT S.A.	0.1%	57.13K	30.57K	-387.06K	-87.14%
Dec 31, 2024	XTX TOPCO LTD	0.38%	219.82K	117.63K	206.61K	+1,564.66%
Dec 31, 2024	NORTHERN TRUST CORP	0.2%	113.28K	60.62K	-4.58K	-3.89%
Mar 31, 2024	ABRDN PLC	1.03%	552.57K	5M	0	0
Mar 31, 2024	POINT72 ASSET MANAGEMENT, L.P.	0.91%	491.62K	4.44M	-1.78K	-0.36%
Mar 31, 2024	NORTHERN TRUST CORP	0.87%	469.6K	4.25M	10.51K	+2.29%
Mar 31, 2024	MORGAN STANLEY	0.76%	408.06K	3.69M	-175.73K	-30.10%
Mar 31, 2024	ALLY BRIDGE GROUP (NY) LLC	0.73%	394.77K	3.57M	394.77K	+100.00%
Mar 31, 2024	WELLINGTON MANAGEMENT GROUP LLP	0.55%	294.98K	2.67M	53.68K	+22.25%
Mar 31, 2024	SCHRODER INVESTMENT MANAGEMENT GROUP	0.54%	290K	2.62M	0	0
Mar 31, 2024	GHOST TREE CAPITAL, LLC	0.53%	285K	2.58M	150K	+111.11%
Mar 31, 2024	CITADEL ADVISORS LLC	0.34%	184.6K	1.67M	168.8K	+1,068.35%
Mar 31, 2024	PROPEL BIO MANAGEMENT, LLC	0.34%	180.1K	1.63M	0	0
Mar 31, 2024	ALTIUM CAPITAL MANAGEMENT LP	0.33%	176.84K	1.6M	-23.16K	-11.58%
Mar 31, 2024	JANE STREET GROUP, LLC	0.31%	167.93K	1.52M	69.9K	+71.29%
Mar 31, 2024	EXOME ASSET MANAGEMENT LLC	0.3%	163.1K	1.47M	163.1K	+100.00%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.3%	160.16K	1.45M	-9.39K	-5.54%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.29%	154.67K	1.4M	5.24K	+3.51%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.29%	153.6K	1.39M	-3.5K	-2.23%
Mar 31, 2024	SIMPLIFY ASSET MANAGEMENT INC.	0.28%	150K	1.36M	0	0
Mar 31, 2024	BOOTHBAY FUND MANAGEMENT, LLC	0.26%	141.21K	1.28M	-20.46K	-12.65%
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.26%	139.75K	1.26M	0	0
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.25%	136.32K	1.23M	63.7K	+87.72%
Mar 31, 2024	PRUDENTIAL FINANCIAL INC	0.73%	390.43K	3.53M	39.6K	+11.29%
Mar 31, 2024	SUVRETTA CAPITAL MANAGEMENT, LLC	9.5%	5.11M	46.18M	-237.6K	-4.44%
Mar 31, 2024	CAPTION MANAGEMENT, LLC	0.7%	378.4K	3.42M	378.4K	+100.00%
Mar 31, 2024	ASSENAGON ASSET MANAGEMENT S.A.	0.5%	271.16K	2.45M	0	0
Mar 31, 2024	IKARIAN CAPITAL, LLC	0.39%	212.2K	1.92M	212.2K	+100.00%
Mar 31, 2024	WALLEYE CAPITAL LLC	0.35%	185.42K	1.68M	-67.08K	-26.57%
Mar 31, 2024	BLACKROCK INC.	8.78%	4.72M	42.67M	121.28K	+2.64%
Mar 31, 2024	GMT CAPITAL CORP	3.03%	1.63M	14.73M	-93.33K	-5.42%
Mar 31, 2024	UBS GROUP AG	0.23%	123.85K	1.12M	40.78K	+49.09%
Mar 31, 2024	TREXQUANT INVESTMENT LP	0.2%	107.53K	972.1K	56.68K	+111.47%
Mar 31, 2024	HAP TRADING, LLC	0.19%	101K	16.3K	101K	+100.00%
Mar 31, 2024	SIMPLEX TRADING, LLC	0.17%	92.27K	834K	92.27K	+100.00%
Mar 31, 2024	RHUMBLINE ADVISERS	0.14%	77.1K	696.95K	1.31K	+1.73%
Mar 31, 2024	HUSSMAN STRATEGIC ADVISORS, INC.	0.14%	73.5K	664.44K	73.5K	+100.00%
Mar 31, 2024	QUBE RESEARCH & TECHNOLOGIES LTD	0.08%	44.2K	399.57K	38.9K	+733.96%
Mar 31, 2024	CAMPBELL & CO INVESTMENT ADVISER LLC	0.13%	69.51K	628.41K	-35.87K	-34.04%
Mar 31, 2024	VICTORY CAPITAL MANAGEMENT INC	0.11%	61.22K	553.43K	-22.05K	-26.48%
Mar 31, 2024	JEFFERIES FINANCIAL GROUP INC.	0.1%	53.19K	480.8K	-112.92K	-67.98%
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.08%	41.3K	373.35K	2.03K	+5.17%
Mar 31, 2024	JPMORGAN CHASE & CO	0.06%	33.63K	304.05K	-10.4K	-23.62%
Mar 31, 2024	GRIMES & COMPANY, INC.	0.06%	33.55K	303.28K	-751	-2.19%
Mar 31, 2024	AMERICAN INTERNATIONAL GROUP, INC.	0.05%	26.98K	243.92K	1.78K	+7.05%
Mar 31, 2024	METLIFE INVESTMENT MANAGEMENT, LLC	0.05%	26.36K	238.26K	0	0
Mar 31, 2024	Y-INTERCEPT (HONG KONG) LTD	0.05%	25.76K	232.87K	25.76K	+100.00%
Mar 31, 2024	INVESCO LTD.	0.04%	23.71K	214.32K	554	+2.39%
Mar 31, 2024	BELVEDERE TRADING LLC	0.02%	13.2K	119.33K	1.5K	+12.82%
Mar 31, 2024	MANUFACTURERS LIFE INSURANCE COMPANY, THE	0.04%	20.12K	181.88K	84	+0.42%
Mar 31, 2024	NEW YORK STATE COMMON RETIREMENT FUND	0.03%	17.11K	155K	-15	-0.09%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.03%	16.37K	148.02K	2.43K	+17.43%
Mar 31, 2024	CITIGROUP INC	0.03%	13.71K	123.96K	5.53K	+67.49%
Mar 31, 2024	PROSHARE ADVISORS LLC	0.03%	13.66K	123.51K	1.78K	+15.00%
Mar 31, 2024	DENALI ADVISORS LLC	0.03%	13.6K	122.94K	0	0
Mar 31, 2024	FOX RUN MANAGEMENT, L.L.C.	0.02%	10.66K	96.39K	10.66K	+100.00%
Mar 31, 2024	JENNISON ASSOCIATES LLC	5.52%	2.97M	26.81M	6.72K	+0.23%
Mar 31, 2024	VANGUARD GROUP INC	5.22%	2.81M	25.37M	132.69K	+4.96%
Mar 31, 2024	AVORO CAPITAL ADVISORS LLC	7.7%	4.14M	37.43M	990.61K	+31.45%
Mar 31, 2024	FRANKLIN RESOURCES INC	6.5%	3.49M	31.58M	-340.7K	-8.89%
Mar 31, 2024	CORMORANT ASSET MANAGEMENT, LP	6.05%	3.25M	29.38M	0	0
Mar 31, 2024	EVENTIDE ASSET MANAGEMENT, LLC	4.37%	2.35M	21.21M	-2.18M	-48.20%
Mar 31, 2024	ADAGE CAPITAL PARTNERS GP, L.L.C.	4.34%	2.33M	21.07M	-250K	-9.69%
Mar 31, 2024	LION POINT CAPITAL, LP	3.94%	2.12M	19.16M	-15.2K	-0.71%
Mar 31, 2024	BLEICHROEDER LP	3.48%	1.87M	16.93M	0	0
Mar 31, 2024	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	2.59%	1.39M	12.6M	-37.68K	-2.63%
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	2.26%	1.21M	10.98M	75.27K	+6.61%
Mar 31, 2024	WOODLINE PARTNERS LP	2.21%	1.19M	10.73M	386.78K	+48.35%
Mar 31, 2024	STATE STREET CORP	2.2%	1.18M	10.68M	175.84K	+17.48%
Mar 31, 2024	SOFINNOVA INVESTMENTS, INC.	1.59%	854.7K	7.73M	754.7K	+754.70%
Mar 31, 2024	BALYASNY ASSET MANAGEMENT L.P.	1.58%	849.45K	7.68M	849.45K	+100.00%
Mar 31, 2024	SUPERSTRING CAPITAL MANAGEMENT LP	1.05%	565.55K	5.11M	103.11K	+22.30%
Dec 31, 2023		0.33%	180.1K	1.96M	180.1K	+100.00%
Dec 31, 2023	POINT72 ASSET MANAGEMENT, L.P.	0.92%	493.4K	5.36M	-571.64K	-53.67%
Dec 31, 2023	ABRDN PLC	1.02%	552.57K	6.01M	552.57K	+100.00%
Dec 31, 2023	OPALEYE MANAGEMENT INC.	1.05%	563.5K	6.13M	-20.5K	-3.51%
Dec 31, 2023	MORGAN STANLEY	1.08%	583.8K	6.35M	536.65K	+1,138.24%
Dec 31, 2023	CITADEL ADVISORS LLC	0.2%	105.3K	1.14M	-13K	-10.99%
Dec 31, 2023	IKARIAN CAPITAL, LLC	1.38%	746.07K	8.11M	0	0
Dec 31, 2023	WOODLINE PARTNERS LP	1.48%	800K	8.7M	168.48K	+26.68%
Dec 31, 2023	STATE STREET CORP	1.87%	1.01M	10.93M	10.35K	+1.04%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	2.11%	1.14M	12.39M	94.55K	+9.05%
Dec 31, 2023	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	2.65%	1.43M	15.56M	0	0
Dec 31, 2023	GMT CAPITAL CORP	3.19%	1.72M	18.73M	0	0
Dec 31, 2023	SOFINNOVA INVESTMENTS, INC.	0.19%	100K	1.09M	-220.6K	-68.81%
Dec 31, 2023	BLEICHROEDER LP	3.47%	1.87M	20.35M	0	0
Dec 31, 2023	LION POINT CAPITAL, LP	3.96%	2.13M	23.2M	-11K	-0.51%
Dec 31, 2023	ADAGE CAPITAL PARTNERS GP, L.L.C.	4.79%	2.58M	28.06M	-323.23K	-11.13%
Dec 31, 2023	VANGUARD GROUP INC	4.96%	2.67M	29.06M	95.76K	+3.72%
Dec 31, 2023	JENNISON ASSOCIATES LLC	5.49%	2.96M	32.17M	3.82K	+0.13%
Dec 31, 2023	AVORO CAPITAL ADVISORS LLC	5.84%	3.15M	34.24M	0	0
Dec 31, 2023	CORMORANT ASSET MANAGEMENT, LP	6.03%	3.25M	35.33M	625K	+23.81%
Dec 31, 2023	FRANKLIN RESOURCES INC	7.11%	3.83M	41.68M	49.59K	+1.31%
Dec 31, 2023	EVENTIDE ASSET MANAGEMENT, LLC	8.4%	4.53M	49.24M	0	0
Dec 31, 2023	BLACKROCK INC.	8.53%	4.6M	49.99M	453.64K	+10.94%
Dec 31, 2023	SUVRETTA CAPITAL MANAGEMENT, LLC	9.91%	5.35M	58.11M	141.18K	+2.71%
Dec 31, 2023	RHUMBLINE ADVISERS	0.14%	75.79K	823.8K	5.08K	+7.19%
Dec 31, 2023	BARCLAYS PLC	0.14%	76.37K	830K	67.36K	+747.45%
Dec 31, 2023	UBS GROUP AG	0.15%	83.07K	902.97K	26.93K	+47.96%
Dec 31, 2023	VICTORY CAPITAL MANAGEMENT INC	0.15%	83.27K	905.15K	-11.28K	-11.93%
Dec 31, 2023	QUBE RESEARCH & TECHNOLOGIES LTD	0.17%	92.84K	1.01M	92.84K	+100.00%
Dec 31, 2023	JANE STREET GROUP, LLC	0.18%	98.04K	1.07M	-40.83K	-29.40%
Dec 31, 2023	CAMPBELL & CO INVESTMENT ADVISER LLC	0.2%	105.38K	1.15M	105.38K	+100.00%
Dec 31, 2023	GHOST TREE CAPITAL, LLC	0.25%	135K	1.47M	135K	+100.00%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.26%	139.75K	1.52M	1.48K	+1.07%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.28%	149.43K	1.62M	10.5K	+7.56%
Dec 31, 2023	SIMPLIFY ASSET MANAGEMENT INC.	0.28%	150K	1.63M	0	0
Dec 31, 2023	HAP TRADING, LLC	0.28%	150K	273.75M	-100K	-40.00%
Dec 31, 2023	BOOTHBAY FUND MANAGEMENT, LLC	0.3%	161.67K	1.76M	-292.2K	-64.38%
Dec 31, 2023	JEFFERIES FINANCIAL GROUP INC.	0.31%	166.1K	1.81M	-88.63K	-34.79%
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.31%	169.55K	1.84M	6.15K	+3.76%
Dec 31, 2023	ALTIUM CAPITAL MANAGEMENT LP	0.37%	200K	2.17M	74.97K	+59.96%
Dec 31, 2023	WELLINGTON MANAGEMENT GROUP LLP	0.45%	241.3K	2.62M	241.3K	+100.00%
Dec 31, 2023	WALLEYE CAPITAL LLC	0.47%	252.5K	2.74M	-88.1K	-25.87%
Dec 31, 2023	ASSENAGON ASSET MANAGEMENT S.A.	0.5%	271.16K	2.95M	-240.04K	-46.96%
Dec 31, 2023	SCHRODER INVESTMENT MANAGEMENT GROUP	0.54%	290K	3.15M	290K	+100.00%
Dec 31, 2023	CAPTION MANAGEMENT, LLC	0.59%	320.6K	3.48M	320.6K	+100.00%
Dec 31, 2023	PRUDENTIAL FINANCIAL INC	0.65%	350.83K	3.81M	79.55K	+29.32%
Dec 31, 2023	NORTHERN TRUST CORP	0.85%	459.09K	4.99M	28.86K	+6.71%

Insiders

Among the MRNS insiders holding of 10.94% of the stake in company, BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC, 10 percent owner, holds the largest shares of 3.98M. DOMAIN PARTNERS VI, L.P., 10 percent owner, is the second largest MRNS insider with ownership of 2.48M shares. BLOCH STEPHEN M, director, stands third with possession of 2.46M shares of that stake.

Insiders	Designation	Shares Held
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	10 percent owner	3.98M
DOMAIN PARTNERS VI, L.P.	10 percent owner	2.48M
BLOCH STEPHEN M	director	2.46M
CANAAN VII L P		2.46M
CANAAN VII LP	10 percent owner	1.85M
BRAUNSTEIN SCOTT	CHAIRMAN AND CEO	304.6K
CASHMAN CHRISTOPHER MICHAEL	CEO	239.76K
PFANSTIEL STEVEN	CFO AND COO	79.77K
HULIHAN JOSEPH	CHIEF MEDICAL OFFICER	72.73K
SHAFER CHRISTINA	CHIEF COMMERCIAL OFFICER	67.41K
MANNING MARTHA E	SVP, GEN. COUNSEL & CORP. SEC.	60.26K
MEHRA ANAND	10 percent owner	15.47K
SMITH EDWARD F	Former VP, CFO & Treasurer	13.29K
JOHNSON MARVIN	director	12.49K
EZICKSON ELAN	director	10.9K
FISCHER SETH H. Z.	director	6.03K
AUSTIN CHARLES	director	5.28K
VITULLO NICOLE	director	0
FARFEL GAIL M	Chief Clinical Dev & Reg Offic	0

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Jan 21, 2025	EZICKSON ELAN	SALE	0.54	1.6K	864	10.9K
Jan 21, 2025	JOHNSON MARVIN	SALE	0.54	1.61K	869.4	12.49K
Aug 14, 2024	BRAUNSTEIN SCOTT	PURCHASE	1.10	5.93K	6.53K	304.6K
Aug 05, 2024	MANNING MARTHA E	SALE	1.13	3.62K	4.09K	60.26K
Aug 05, 2024	HULIHAN JOSEPH	SALE	1.13	4.83K	5.46K	72.73K
Aug 05, 2024	SHAFER CHRISTINA	SALE	1.14	3.82K	4.35K	67.41K
Aug 05, 2024	BRAUNSTEIN SCOTT	SALE	1.13	12.15K	13.72K	298.67K
Aug 05, 2024	PFANSTIEL STEVEN	SALE	1.13	4.66K	5.26K	79.77K
Feb 20, 2024	MANNING MARTHA E	SALE	9.57	1.89K	18.13K	52.97K
Feb 20, 2024	SHAFER CHRISTINA	SALE	9.56	2.15K	20.58K	60.31K
Feb 16, 2024	PFANSTIEL STEVEN	SALE	9.97	3.09K	30.83K	71.7K
Feb 16, 2024	BRAUNSTEIN SCOTT	SALE	9.94	11.85K	117.79K	223.51K
Feb 16, 2024	HULIHAN JOSEPH	SALE	9.98	2.81K	28.08K	66.64K
Aug 08, 2023	PFANSTIEL STEVEN	SALE	8.93	14	125.02	49.32K
Aug 08, 2023	HULIHAN JOSEPH	SALE	8.93	13	116.09	47.61K
Aug 08, 2023	BRAUNSTEIN SCOTT	SALE	8.94	30	268.2	160.76K
Aug 08, 2023	SHAFER CHRISTINA	SALE	8.93	11	98.23	40.63K
Aug 08, 2023	MANNING MARTHA E	SALE	8.93	11	98.23	33.03K
Aug 07, 2023	BRAUNSTEIN SCOTT	SALE	9.55	6.41K	61.24K	160.79K
Aug 07, 2023	PFANSTIEL STEVEN	SALE	9.54	2.79K	26.62K	49.34K
Aug 07, 2023	MANNING MARTHA E	SALE	9.54	2.17K	20.69K	33.04K
Aug 07, 2023	HULIHAN JOSEPH	SALE	9.55	2.89K	27.59K	47.63K
Aug 07, 2023	SHAFER CHRISTINA	SALE	9.52	2.39K	22.71K	40.64K
Feb 06, 2023	AUSTIN CHARLES	SALE	6.49	1.07K	6.96K	5.28K
Feb 06, 2023	EZICKSON ELAN	SALE	6.56	750	4.92K	5.6K
Feb 06, 2023	FISCHER SETH H. Z.	SALE	6.54	1.02K	6.66K	6.03K
Mar 15, 2021	VITULLO NICOLE	SALE	15.87	4.25K	67.45K	0
Mar 09, 2021	SMITH EDWARD F	SALE	17.80	40.36K	718.34K	13.29K
Jan 30, 2020	SMITH EDWARD F	SALE	2.05	2.38K	4.88K	17.72K
Dec 13, 2019	BRAUNSTEIN SCOTT	PURCHASE	1.25	100K	125K	100K
May 16, 2019	SMITH EDWARD F	SALE	5.03	24.21K	121.78K	20.1K
Jan 29, 2019	SMITH EDWARD F	SALE	3.06	2.49K	7.63K	44.31K
Jan 28, 2019	CASHMAN CHRISTOPHER MICHAEL	SALE	3.13	8.14K	25.48K	239.76K
Jan 29, 2018	SMITH EDWARD F	SALE	7.91	3K	23.73K	49.8K
Jan 18, 2018	CASHMAN CHRISTOPHER MICHAEL	SALE	6.28	9.57K	60.07K	247.9K
Dec 19, 2017	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	SALE	7.11	55.23K	392.43K	3.98M
Dec 18, 2017	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	SALE	7.50	300K	2.25M	4.13M
Dec 15, 2017	BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC	SALE	8.64	102.88K	888.49K	4.43M
Oct 20, 2016	MEHRA ANAND	SALE	1.39	12.53K	17.4K	15.47K
Aug 08, 2016	CANAAN VII LP	SALE	1.50	19.95K	29.93K	1.85M
Aug 05, 2016	CANAAN VII LP	SALE	1.50	129.2K	193.81K	1.87M
Aug 04, 2016	CANAAN VII LP	SALE	1.50	3.33K	4.99K	2M
Aug 03, 2016	CANAAN VII LP	SALE	1.50	142.25K	213.38K	2M
Jul 29, 2016	CANAAN VII LP	SALE	1.71	24.54K	41.96K	2.15M
Jul 27, 2016	CANAAN VII LP	SALE	1.80	209	376.2	2.17M
Jul 26, 2016	CANAAN VII LP	SALE	1.81	20.38K	36.89K	2.17M
Jul 25, 2016	CANAAN VII LP	SALE	1.86	137.62K	255.97K	2.19M
Jul 22, 2016	CANAAN VII LP	SALE	1.94	133.13K	258.28K	2.33M
Nov 06, 2015	CASHMAN CHRISTOPHER MICHAEL	PURCHASE	5.61	3.56K	19.98K	116.09K
Apr 21, 2015	FARFEL GAIL M	SALE	9.48	30K	284.51K	0
Aug 05, 2014	BLOCH STEPHEN M	PURCHASE	8.00	625K	5M	2.46M
Aug 05, 2014	CANAAN VII L P	PURCHASE	8.00	625K	5M	2.46M
Aug 05, 2014	MEHRA ANAND	PURCHASE	8.00	12.53K	100.22K	28K
Aug 05, 2014	DOMAIN PARTNERS VI, L.P.	PURCHASE	8.00	419.74K	3.36M	2.48M

Frequently Asked Questions