Rubico Shares Jump After Trillium Filing Flip Stirs RUBI Volatility

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.