NASDAQ:RUBI 5 November 2025 - 12 June 2026

Rubico Inc. shares surged again on Friday, posting another big move in what’s been a wild week for the micro-cap. Traders cited a burst of ownership filings as a key driver. RUBI was recently at $0.8396, up about 35% from Thursday’s close. The stock opened at $0.7034 and hit an intraday high of $1.22. More than 200 million shares traded. Micro-caps like Rubico are known for sharp swings when volume spikes, since small demand changes can overwhelm the supply of sellers.

Rubico Inc. surged on Thursday, with RUBI on Nasdaq last quoted at $0.6732, up $0.2032, or roughly 43% from the day before. The stock started at $0.50 and swung between $0.46 and a session peak of $1.07. By 14:49 ET, trading volume hit 154.16 million shares.

Rubico Inc shares jumped over 100% in U.S. premarket hours Tuesday as the small Nasdaq-listed tanker company drew attention before the session opened.

Rubico Inc surged 53% to $1.55 ahead of Tuesday’s open, following a 20% climb to $1.01 the previous day. Monday’s session saw the stock move from $0.94 to $1.32, with volume hitting roughly 17.7 million shares.

Rubico Inc., a tiny crude‑oil shipping spin‑off, has become one of the wildest tickers on the Nasdaq Capital Market. After a dilutive equity offering, major fleet refinancing and a 1‑for‑30 reverse stock split in November, RUBI stock is now trading in the high‑$2 range on December 3, 2025 — roughly 99% below its split‑adjusted 52‑week high of about $200.70. Investing.com+1

Rubico Inc., the tiny Greek crude‑oil tanker owner that only began trading on Nasdaq in August, is back in the spotlight today after closing a major $84 million fleet refinancing — and still seeing its stock sink around the $0.20 level. Investing.com Australia+1

Rubico Inc. published a Form 6‑K on Friday confirming it closed a firm‑commitment public offering of 12,315,270 units on Nov. 6 at $0.609 per unit. Gross proceeds were approximately $7.5 million before fees. The underwriter partially exercised the over‑allotment option for 1,847,290 warrants at closing. SEC

Rubico Inc. is a Marshall Islands-incorporated shipping company providing crude oil transportation services via a small fleet of tankersglobenewswire.comglobenewswire.com. The company was created as a spin-off from TOP Ships Inc., a Greek tanker owner, to separately house two Suezmax oil tankersstocktwits.com. Both 2021-built vessels are “eco” fuel-efficient tankers on long-term time charter contracts with Clearlake, ensuring stable charter revenue streamsrivieramm.com. Rubico’s strategy focuses on owning and operating these modern tankers, leveraging their high specification and scrubber-fitted fuel efficiency to attract charterersglobenewswire.com.