Security key
Y18284169
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 37,401
- Total 13F value
- $122,675
- Share change
- +37,370
- SEC-reported price per share
- $3.28
- Number of holders
- 4
- Value change
- +$122,574
- Number of buys
- 3
- Number of sells
- 1
- Shares outstanding
- 538,462
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
4
Top holders
4
CISS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
C3is Inc. SEC filings
C3is Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP Y18284169
Recent filing periods:
Ownership snapshot
Top reported holders of CISS - C3is 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
Imperial Petroleum Inc./M...
Disclosed value leader
Imperial Petroleum Inc./M...
Comparable rows
6/6
Latest evidence
31 Mar 2025
13D/G
13F
Lead comparable stake: 73%
13D/G row: Imperial Petroleum Inc./Marshall Islands
Quick read
Imperial Petroleum Inc./Marshall Islands leads the comparable SEC ownership view at 73%.
6 of 6 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 Imperial Petroleum Inc./Marshall Islands's linked filing trail.
Comparable ownership
Top 5
Imperial Petroleum Inc./Marshall ...
73%
L1 Capital Global Opportunities M...
5%
TOWERVIEW LLC
4.1%
WEXFORD CAPITAL LP
0.55%
SBI Securities Co., Ltd.
0.01%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 6 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Imperial Petroleum Inc./Marshall Islands |
13D/G
Imperial Petroleum Inc.
|
73%
|
$5,766,126
11,532,251 shares
|
$0 | 10 Jan 2025 |
| L1 Capital Global Opportunities Master Fund, Ltd. |
13D/G
|
5%
|
$111,325
222,650 shares
|
$0 | 31 Dec 2024 |
| TOWERVIEW LLC |
13F
Company
|
4.1%
|
$117,593
180,913 shares
|
— | 31 Mar 2025 |
| WEXFORD CAPITAL LP |
13F
Company
|
0.55%
|
$16,010
24,632 shares
|
— | 31 Mar 2025 |
| SBI Securities Co., Ltd. |
13F
Company
|
0.01%
|
$20
31 shares
|
— | 31 Mar 2025 |
| Estabrook Capital Management |
13F
Company
|
0%
|
$5
7 shares
|
— | 31 Mar 2025 |
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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
4
Shares
37,401
Rows available
4
| 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 Q2 2025 vs Q4 2025 Across Filers
Q4 2025 holders
5
Q2 2025 holders
4
Holder diff
-1
| Investor | Q4 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q4 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend