Latest Period
n/a
Security Snapshot
MARINUS PHARMACEUTICALS, INC. - COMMON STOCK (MRNS) Institutional Ownership
CUSIP: 56854Q200
13F Institutional Holders and Ownership History from Q3 2020 to Q4 2025
Institutions Reporting
Shares (Excl. Options)
Price
$0.55
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- MRNS
- Shares outstanding
- 54,731,500
- SEC-reported price per share
- $0.55
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MRNS - MARINUS PHARMACEUTICALS, INC. - COMMON STOCK is tracked under CUSIP 56854Q200.
- Latest finished 13F holder period is not available.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 1 to 0 between Q3 2025 and Q4 2025.
- SEC-reported value moved from $531 to $0.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Schedule 13D/G
Open SEC evidence
Ownership context comes from Schedule 13D/G and available holder history for this CUSIP.
Security key
56854Q200
Latest holder period
n/a
13F holders
13D/G owners
3
CIK / CUSIP context first
MRNS full holder history
MARINUS PHARMACEUTICALS, INC. SEC filings
MARINUS PHARMACEUTICALS, INC. company facts
MARINUS PHARMACEUTICALS, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 56854Q200:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
MRNS
| 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 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
22
Latest
n/a
Rows shown
1-22 of 22
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 0 | $0 | -$531 | $0.55 | 0 |
| 2025 Q3 | 302 | $531 | +$531 | $1.76 | 1 |
| 2025 Q2 | 6,001 | $3,239 | +$3,239 | $0.54 | 1 |
| 2025 Q1 | 0 | $0 | -$15,805,974 | $0.55 | 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 |