What does CUSIP 56854Q200 represent in this 13F holders report?

CUSIP 56854Q200 is the security identifier for MRNS - MARINUS PHARMACEUTICALS, INC. - COMMON STOCK used to aggregate holder disclosures.

How many institutions held MRNS - MARINUS PHARMACEUTICALS, INC. - COMMON STOCK in Q1 2024?

112 institutional investors reported MRNS - MARINUS PHARMACEUTICALS, INC. - COMMON STOCK for Q1 2024. Use the holders table for investor-level position and value details.

MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (MRNS)

CUSIP: 56854Q200

Q1 2024 13F Holders as of 31 Mar 2024

Security type / class: Equity / COMMON STOCK
Total 13F shares: 53,814,604
Total 13F value: $486,485,651
Share change: -4,291
Put/Call ratio: 156%
SEC-reported price per share: $9.04
Number of holders: 112
Value change: -$1,482,664
Number of buys: 58
Number of sells: 48
Shares outstanding: 54,731,500

Security key

56854Q200

Report period

Q1 2024

Institutions

112

Top holders

MRNS full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2025 MARINUS PHARMACEUTICALS, INC. SEC filings MARINUS PHARMACEUTICALS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 56854Q200

Newer quarter: Q3 2025

Recent filing periods:

Q4 2025 Q3 2025

Ownership snapshot

Top reported holders of MRNS - MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

MONTANOVA CAPITAL, LLC

Disclosed value leader

MONTANOVA CAPITAL, LLC

Comparable rows

0/15

Latest evidence

31 Dec 2023

13F Highest disclosed value: $58,112,314 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

MONTANOVA CAPITAL, LLC has the largest disclosed position value at $58.11M.

0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens MONTANOVA CAPITAL, LLC's linked filing trail.

Disclosed position value Top 5

MONTANOVA CAPITAL, LLC $58.11M

BlackRock Finance, Inc. $49.99M

EVENTIDE ASSET MANAGEMENT, LLC $49.24M

FRANKLIN TEMPLETON INC $41.68M

Cormorant Asset Management, LP $35.33M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
MONTANOVA CAPITAL, LLC	13F Company 13F	— denominator unverified	$58,112,314 5,346,119 shares	—	31 Dec 2023
BlackRock Finance, Inc.	13F Company 13F	— denominator unverified	$49,994,152 4,599,278 shares	—	31 Dec 2023
EVENTIDE ASSET MANAGEMENT, LLC	13F Company 13F	— denominator unverified	$49,241,067 4,529,997 shares	—	31 Dec 2023
FRANKLIN TEMPLETON INC	13F Company 13F	— denominator unverified	$41,675,091 3,833,955 shares	—	31 Dec 2023
Cormorant Asset Management, LP	13F Company 13F	— denominator unverified	$35,327,500 3,250,000 shares	—	31 Dec 2023
Avoro Capital Advisors LLC	13F Company 13F	— denominator unverified	$34,240,500 3,150,000 shares	—	31 Dec 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2024

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

112

53,814,604

Rows available

112

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2024 vs Q3 2025 Across Filers

Q3 2025 holders

Q1 2024 holders

112

Holder diff

111

Investor	Q3 2025 Shares	Q1 2024 Shares	Share Diff	Share Chg %	Q3 2025 value	Q1 2024 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend