About Imperial Petroleum
Imperial Petroleum Inc Marshall Islands is an SEC registrant, classified under SIC 4412 (Deep Sea Foreign Transportation of Freight). It files with the SEC under Central Index Key 0001876581, and its shares are listed as IMPP on Nasdaq. Its most recent filing on EDGAR is a 4, filed October 21, 2026. 60 institutional investment managers reported holding its shares on Form 13F for Q2 2026, against 58 in Q1 2026. Its officers, directors and 10% owners have filed 3 Form 4 reports since 2026. 1 investor reports a stake of 5% or more on Schedule 13D or 13G. 2 registered funds report holding its shares on Form N-PORT.
Across SEC filings
Institutional holders · 13F
Q2 2026| Largest holders | Reported value |
|---|---|
| ACADIAN ASSET MANAGEMENT LLC | $8.5M |
| Anson Funds Management LP | $7.3M |
| Deuterium Capital Management LLC | $3.6M |
| RENAISSANCE TECHNOLOGIES LLC | $3.0M |
| MARSHALL WACE LLP | $2.9M |
Funds & ETFs · N-PORT
2 funds| Fund | Value | % of fund |
|---|---|---|
| AUER GROWTH | $393.8K | 0.46% |
| ACUITAS US MICROCAP FUND | $261.4K | 0.22% |
2 funds reported holding $655.1K in total on their latest public Form N-PORT reports, the most recent dated August 2026. Security record
Insider trades · Form 4
No open-market purchases or sales by Imperial Petroleum insiders in the last 12 months.
Latest filings
- Harry Vafias 2026-10-21 Exercise
- Harry Vafias 2026-08-21 Exercise
5%+ holders · 13D/G
1 filer| Filer | % of class | Filed |
|---|---|---|
| Flawless Management Inc 13D | 31.9% | 2026-06-24 |
Latest Schedule 13D or 13G from each filer; stakes a filer has reported closed are left out.