Imperial Petroleum Inc./Marshall Islands

Holdings History for C3is Inc. - Common Stock, $0.01 par value (CISS)

Symbol: CISS on Nasdaq
Investment type: Equity / Common Stock, $0.01 par value
Latest Disclosed Shares Owned: 36,337,209 shares
Security Ownership %: 74%

Imperial Petroleum Inc. ownership in C3is Inc. Common Stock, $0.01 par value (CISS)

30 Dec 2025 - Imperial Petroleum Inc. has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 36,337,209 shares of C3is Inc. Common Stock, $0.01 par value (CISS). This represents 74% ownership of the company. In their previous filing dated 10 Oct 2025, Imperial Petroleum Inc./Marshall Islands had reported owning 6,000,000 shares, indicating an increase of +506%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Imperial Petroleum Inc.	74%	+7.5%	$53,415,697	36,337,209	+30,337,209	+506%	$1.47	13D/A	29 Dec 2025	30 Dec 2025, 17:00
Imperial Petroleum Inc.	61%	-11%	$18,375,000	12,500,000	+6,500,000	+108%	$1.47	13D/A	12 Dec 2025	15 Dec 2025, 06:05
Imperial Petroleum Inc.	69%	-21%	$13,680,000	6,000,000	+1,064,329	+22%	$2.28	13D/A	09 Oct 2025	10 Oct 2025, 17:00
Imperial Petroleum Inc.	87%		$16,238,358	4,935,671			$3.29	13D/A	11 Apr 2025	15 Apr 2025, 20:00