Imperial Petroleum (IMPP) director discloses stock and option holdings

Rhea-AI Filing Summary

Imperial Petroleum Inc. director Kostogiannis Ioannis has reported his initial ownership position. The filing shows 16,469 shares of Common Stock and 235 shares of 8.75% Series A Cumulative Redeemable Perpetual Preferred Stock held directly. He also holds stock options over 3,000 Common shares at an exercise price of 3.6000, with 50% already vested and the remainder vesting on April 12, 2026, and fully vested options over 12,500 Common shares at an exercise price of 1.6000. The entry reflects holdings only and does not report new buy or sell transactions.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Kostogiannis Ioannis

(Last) (First) (Middle)

IMPERIAL PETROLEUM INC.

331 KIFISSIAS AVENUE ERITHREA

(Street)

ATHENS GREECE 14561

(City) (State) (Zip)

GREECE

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Imperial Petroleum Inc./Marshall Islands [ IMPP ]

3a. Foreign Trading Symbol
[NONE]

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	16,469	D
8.75% Series A Cumulative Redeemable Perp. Preferred Stock	235	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	04/12/2034	Common Stock	3,000	$3.6	D
Stock Option (Right to Buy)	(2)	10/30/2033	Common Stock	12,500	$1.6	D

Explanation of Responses:

1. 50% of the shares subject to such option are vested and exercisable. The remaining 50% of the shares subject to such option vest and become exercisable on April 12, 2026, subject to the Reporting Person's continuous service to the Issuer on such date.

2. Fully vested.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Nina Pyndiah, Attorney-in-Fact	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What insider position does Kostogiannis Ioannis report in Imperial Petroleum (IMPP)?

Kostogiannis Ioannis reports an initial position as a director of Imperial Petroleum, holding 16,469 Common Stock shares and 235 shares of 8.75% Series A Cumulative Redeemable Perpetual Preferred Stock, plus stock options over additional Common shares at set exercise prices.

How many Imperial Petroleum (IMPP) common shares does the director directly own?

The director directly owns 16,469 shares of Imperial Petroleum Common Stock. This figure reflects his reported direct equity stake, separate from any options, as of the Form 3 filing and indicates his baseline ownership before any future transactions.

What stock options over Imperial Petroleum (IMPP) common shares does the director hold?

He holds stock options over 3,000 Common Stock shares at an exercise price of $3.6000 and over 12,500 Common Stock shares at $1.6000. These options provide the right, but not the obligation, to buy shares at those prices before expiration.

What are the vesting terms of the Imperial Petroleum (IMPP) stock options at $3.6000?

For the option with a $3.6000 exercise price, 50% of the 3,000 underlying shares are vested and exercisable. The remaining 50% vest and become exercisable on April 12, 2026, subject to the director’s continuous service to the company until that date.

Are any of the Imperial Petroleum (IMPP) director’s stock options already fully vested?

Yes. The stock option covering 12,500 Common Stock shares at a $1.6000 exercise price is fully vested. This means all 12,500 underlying shares are currently exercisable, subject to the option’s stated expiration date and other standard plan conditions.

Does this Imperial Petroleum (IMPP) Form 3 show any insider share purchases or sales?

No. The Form 3 reflects only existing holdings and option positions for director Kostogiannis Ioannis. It lists Common Stock, preferred shares, and stock options but does not report any new purchases, sales, or other transactional changes in ownership.