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MRNS

Marinus Pharmaceuticals, Inc
MRNS

Delisted

MRNS was delisted on the 10th of February, 2025.

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87 hedge funds and large institutions have $480M invested in Marinus Pharmaceuticals, Inc in 2021 Q1 according to their latest regulatory filings, with 11 funds opening new positions, 44 increasing their positions, 18 reducing their positions, and 12 closing their positions.

New
Increased
Maintained
Reduced
Closed

144% more repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 18

50% more funds holding in top 10

Funds holding in top 10: 2 → 3 (+1)

27% more capital invested

Capital invested by funds: $378M → $480M (+$103M)

8% less first-time investments, than exits

New positions opened: 11 | Existing positions closed: 12

1% less funds holding

Funds holding: 88 → 87 (-1)

66% less call options, than puts

Call options by funds: $3.65M | Put options by funds: $10.8M

Holders
87
Holders Change
-1
Holders Change %
-1.14%
% of All Funds
1.53%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.05%
New
11
Increased
44
Reduced
18
Closed
12
Calls
$3.65M
Puts
$10.8M
Net Calls
-$7.17M
Net Calls Change
-$789K

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$9.35M
2
AG
Artal Group
Luxembourg
+$7.23M
3
SCM
Suvretta Capital Management
New York
+$5.73M
4
SAM
Scion Asset Management
California
+$4.3M
5
Goldman Sachs
Goldman Sachs
New York
+$2.42M

Top Sellers

Rank Fund Capital Flow
1
RCM
RA Capital Management
Massachusetts
-$15.9M
2
Alyeska Investment Group
Alyeska Investment Group
Illinois
-$8.9M
3
LM
Luminus Management
Texas
-$4.33M
4
KPWS
Kestra Private Wealth Services
Texas
-$2.47M
5
LCM
Laurion Capital Management
New York
-$1.95M
Name Holding Trade Value Shares
Change 		Change in
Stake
Bank of New York Mellon
26
Bank of New York Mellon
New York
$1.48M +$104K +7,158 +8%
Assenagon Asset Management
27
Assenagon Asset Management
Luxembourg
$1.43M – – –
Victory Capital Management
28
Victory Capital Management
Texas
$1.42M +$91.6K +6,330 +7%
First Trust Advisors
29
First Trust Advisors
Illinois
$1.33M +$261K +18,042 +26%
N
30
Nuveen
North Carolina
$1.33M +$30K +2,073 +2%
Charles Schwab
31
Charles Schwab
California
$1.16M +$194K +13,412 +22%
SC
32
Saltoro Capital
Texas
$1.09M +$231K +16,000 +29%
Los Angeles Capital Management
33
Los Angeles Capital Management
California
$1.08M +$157K +10,835 +18%
Morgan Stanley
34
Morgan Stanley
New York
$1.06M +$497K +34,343 +100%
Dimensional Fund Advisors
35
Dimensional Fund Advisors
Texas
$941K -$34.3K -2,369 -4%
DMK
36
David M. Knott
$933K +$510K +35,266 +141%
Two Sigma Investments
37
Two Sigma Investments
New York
$927K -$82.9K -5,732 -9%
California Public Employees Retirement System
38
California Public Employees Retirement System
California
$787K -$65.2K -4,510 -8%
Jane Street
39
Jane Street
New York
$721K +$523K +36,137 +347%
Millennium Management
40
Millennium Management
New York
$702K +$125K +8,642 +24%
California State Teachers Retirement System (CalSTRS)
41
California State Teachers Retirement System (CalSTRS)
California
$680K +$88K +6,083 +16%
T. Rowe Price Associates
42
T. Rowe Price Associates
Maryland
$653K +$610K +42,186 New
PAI
43
Palo Alto Investors
California
$485K – – –
HP
44
Harbourvest Partners
Massachusetts
$479K +$448K +30,962 New
State of Wisconsin Investment Board
45
State of Wisconsin Investment Board
Wisconsin
$471K – – –
Citadel Advisors
46
Citadel Advisors
Florida
$453K +$424K +29,291 New
Bank of America
47
Bank of America
North Carolina
$450K +$238K +16,441 +130%
Blackstone Inc
48
Blackstone Inc
New York
$439K +$411K +28,382 New
RhumbLine Advisers
49
RhumbLine Advisers
Massachusetts
$402K -$8.94K -618 -2%
MS
50
Maven Securities
Jersey
$379K +$181K +12,500 +100%
1
2
3 4

MRNS Hedge Fund Activity: Q1 2021 in Review

87 of the 5,695 institutional investors tracked by Wall St. Rank reported a position in Marinus Pharmaceuticals, Inc (MRNS) for Q1 2021, worth a combined $480M — up 27% from $378M a quarter earlier.

Sellers outnumbered buyers: 12 funds closed out of MRNS and 11 opened new positions — a net loss of 1 holder — while 18 trimmed existing stakes and 44 added.

The largest buyer was BlackRock, adding an estimated $9.35M. The largest seller was RA Capital Management, exiting entirely with an estimated $15.9M sold.

  • 87 institutional investors held Marinus Pharmaceuticals, Inc (MRNS) as of Q1 2021, down from 88 in Q4 2020.
  • Funds reported $480M of Marinus Pharmaceuticals, Inc stock for Q1 2021, up 27% quarter-over-quarter.
  • 11 funds opened new Marinus Pharmaceuticals, Inc positions in Q1 2021 and 12 closed out, a net change of -1 holder.
  • The largest Marinus Pharmaceuticals, Inc buyer in Q1 2021 was BlackRock, an estimated $9.35M added.
  • The largest Marinus Pharmaceuticals, Inc seller in Q1 2021 was RA Capital Management, an estimated $15.9M sold.

Based on aggregated 13F filings for Q1 2021.