MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (MRNS) Institutional Ownership

13F Institutional Holders and Ownership History from Q3 2020 to Q2 2025

Type / Class
Equity / COMMON STOCK
Symbol
MRNS
Shares outstanding
54,731,500
Price per share
$0.54
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (MRNS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SUVRETTA CAPITAL MANAGEMENT, LLC 5.5% +42% $1,662,437 +$504,541 3,022,612 +44% SUVRETTA CAPITAL MANAGEMENT, LLC 07 Feb 2025
VANGUARD GROUP INC 4.7% $1,428,222 2,596,768 The Vanguard Group 31 Dec 2024
TANG CAPITAL PARTNERS LP 3% $903,070 1,641,945 TANG CAPITAL MANAGEMENT, LLC 31 Dec 2024

Institutional Holders of MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (MRNS) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q2 6,001 $3,239 +$3,239 $0.54 1
2025 Q1 0 $0 -$15,805,974 $0.54 0
2024 Q4 29,546,858 $15,806,681 -$30,407,453 $0.54 51
2024 Q3 41,360,707 $72,857,551 -$1,829,578 $1.76 72
2024 Q2 43,261,432 $50,613,042 -$154,128,331 $1.17 87
2024 Q1 53,814,604 $486,485,651 -$1,482,664 $9.04 112
2023 Q4 53,838,147 $585,186,420 +$27,804,176 $10.87 104
2023 Q3 51,062,301 $411,105,468 +$48,310,465 $8.05 102
2023 Q2 44,658,216 $485,001,751 +$47,690,063 $10.86 104
2023 Q1 41,133,046 $283,923,170 +$27,882,072 $6.90 85
2022 Q4 36,217,050 $144,151,783 +$42,915,680 $3.98 71
2022 Q3 25,225,216 $167,892,039 +$2,295,744 $6.65 64
2022 Q2 28,789,161 $140,549,658 -$7,995,233 $4.84 67
2022 Q1 29,952,564 $280,390,852 -$1,230,168 $9.35 82
2021 Q4 29,927,351 $355,704,830 -$20,472,880 $11.88 73
2021 Q3 31,795,764 $361,957,260 -$2,691,074 $11.38 78
2021 Q2 31,397,248 $563,274,910 +$7,464,957 $17.94 79
2021 Q1 31,028,457 $480,277,396 +$31,148,764 $15.48 85
2020 Q4 29,493,235 $359,839,976 +$131,125,817 $12.20 82
2020 Q3 18,608,810 $238,849,091 +$238,841,091 $12.85 73