$CISS

$0.49 -$0.00 (0.16%) Close

$CISS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 1.5M shares outstanding

Who owns CISS?

By type of holder

Institutions 5.0% Insiders 0.3% Everyone else 94.7%

Concentration Top 7 holders own 422.0%

Imperial Petroleum Inc. 411.8% · HRT Financial LP 1.6%

Institutional ownership

5.0%

-0.9 pts vs last qtr

Institutional holders

0 vs last qtr

Net shares bought

−14.0K

by institutions in Q2 2026

New / sold out

2 / 2

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Towerview LLC NEW +50.0K
Caitong International Asset Management Co., Ltd NEW +2

Biggest sellers in Q2 2026

HRT Financial LP −52.1K
StoneX Group Inc. SOLD OUT −10.4K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for C3is Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2023–FY2025

+71779.9%

+2581.04% a year

Each share's claim on the business

−99.9%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $751K

over 3 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

64.4%

of institutional shares changed hands

Top 10 managers, median time held

0 quarters

Super Investors

Investment managers reporting CISS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
HF HRT Financial LP	24.5K	1.64%	−52.1K (−68.0%)	Q1 '26	0.0%
Shares held by quarter Peak holding76.5K (Q1'26) Change over 8 quarters+24.5K Share of the company1.640% HRT Financial LP's full portfolio →
T Towerview LLC	50.0K	3.36%	NEW	Q2 '26	0.1%
Shares held by quarter Peak holding180.9K (Q1'25) Change over 8 quarters+50.0K Share of the company3.360% Towerview LLC's full portfolio →

HRT Financial LP

24.5K

% of company

1.64%

Change vs last qtr

−52.1K (−68.0%)

Held since

Q1 '26

Towerview LLC

50.0K

% of company

3.36%

Change vs last qtr

NEW

Held since

Q2 '26

3 more super investors behind a free account

See every manager holding C3is Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CISS on Form N-PORT; together they hold 0.0% of the company

No fund reports holding CISS yet.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
IP Imperial Petroleum Inc. 5%+ holder 13D · 80.5%	6.1M	411.84%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company411.840% Disclosed stake13D · 80.5% View the 13D/G filing →
AP Arethusa Properties LTD 5%+ holder 13D · 2.7%	72.3K	4.85%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.850% Disclosed stake13D · 2.7% View the 13D/G filing →

Imperial Petroleum Inc.

5%+ holder13D · 80.5%

6.1M

% of company

411.84%

Change vs last qtr

—

Held since

—

Arethusa Properties LTD

5%+ holder13D · 2.7%

72.3K

% of company

4.85%

Change vs last qtr

—

Held since

—

2 more holders behind a free account

See every insider and 5%+ holder of C3is Inc.

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