C3is Inc (CISS) Institutional Ownership

What the institutions did with CISS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers reporting

6

filed a 13F this quarter

Managers holding

4

+1 on the quarter

Buyers

3

3 opened new

Sellers

3

2 sold out entirely

Buyer share

50.0%

of managers who traded it

Breadth

+0.0

net buyers, as a share of those trading

Only 6 managers reported a position this quarter, so the percentages above describe a very small sample.

Largest holders

Manager	Shares	% of reported
TOWERVIEW LLC	50.0K	67.1%
HRT FINANCIAL LP	24.5K	32.8%
Integrated Wealth Concepts LLC	5	0.0%
Caitong International Asset Management Co., Ltd	2	0.0%

Largest changes

Manager	Action	Previous	Current	Change
HRT FINANCIAL LP	Reduced	76.5K	24.5K	-52.1K
TOWERVIEW LLC	New	0	50.0K	+50.0K
StoneX Group Inc.	Sold Out	10.4K	0	-10.4K
SUMMIT SECURITIES GROUP LLC	Sold Out	1.5K	0	-1.5K
Integrated Wealth Concepts LLC	New	0	5	+5
Caitong International Asset Management Co., Ltd	New	0	2	+2

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.