History
Transocean spent a decade refinancing debt, absorbing rivals and swapping bonds for shares, and by mid-2026 had a pending merger with Valaris and a growing contract backlog.
2016-2017: Buying in Transocean Partners
The record opens in July 2016 with Transocean Inc. closing a $1.25 billion offering of 9.00% notes due 2023, much of it used to buy back older notes. On July 31 it agreed to acquire Transocean Partners, the listed partnership in which it already held about 21.3 million units, swapping each public unit for 1.1427 Transocean shares. In November it raised the ratio to 1.2000, and unitholders approved on December 6. The deal closed on December 9, with about 23.8 million new shares issued and Partners becoming a wholly owned subsidiary.
In between, Transocean funded two newbuild drillships with rig-secured notes: $600 million for the Deepwater Thalassa in October and $625 million for the Deepwater Proteus in December. It also won a Suncor contract for the Barents, and Reliance agreed to pay about $160 million to end the Discoverer India contract early. In October 2017 it issued $750 million of 7.50% notes to repay near-term maturities.
2017-2019: Songa and Ocean Rig
In August 2017 Transocean agreed to buy Songa Offshore, paying roughly half in new shares and half in exchangeable bonds. By December it had signed exchanges of about $273.5 million of 0.5% exchangeable bonds due 2023 for Songa's bonds and a $50 million loan from Perestroika, the investment company of Frederik Mohn. The bonds could turn into about 26.6 million shares. The records from 2018 treat the Songa rigs as part of Transocean.
In September 2018 it agreed to buy Ocean Rig, offering 1.6128 shares plus $12.75 in cash per share, about $1.17 billion in cash in all. Ocean Rig holders were to own about 24% of the company. A March 2019 contract announcement confirms the deal had closed, giving a fleet of 48 rigs. Meanwhile it signed a new $1.0 billion secured revolving credit facility and issued rig-secured bonds on the Songa Enabler and Encourage, Pontus, Poseidon, and Endurance and Equinox. The share count rose from about 391 million at the end of 2017 to about 610 million a year later.
2020-2022: Debt under strain
In January 2020 Transocean issued $750 million of 8.00% notes due 2027 and gave notice to redeem the 9.00% notes. The year turned difficult. In August it swapped 0.5% bonds for new 2.5% exchangeable bonds due 2027, and in September it exchanged about $1.5 billion of older notes for $687 million of new 11.50% notes. Holders including PIMCO and Whitebox sent default notices over guarantees, and Whitebox sued. The company called the claims meritless, and the outcomes are not stated. In October the NYSE warned that the share price had been under $1.00 for 30 trading days, and the outcome is not stated either.
In 2021 it exchanged more 2023 bonds for 4.00% exchangeable bonds due 2025, delayed delivery of its Atlas and Titan drillships with shipyard financing, and set up a $400 million share-sale programme. In 2022 it extended its revolver to June 2025 at a smaller size, replaced the share programme with a $435 million one, and in September raised $300 million of 4.625% exchangeable bonds with warrants. Contract wins for Petrobras 10000, Conqueror, Asgard, Corcovado and Orion added backlog.
2023-2024: Debt into shares, and the Norge buyout
In 2023 Transocean refinanced rig-secured notes into $1.175 billion of 8.75% notes due 2030 and issued $525 million of 8.375% notes on the Titan. It converted bonds into shares: a holder of $213 million of 2027 exchangeables took 34.6 million shares in April, and in October $101 million of other exchangeables were swapped for new shares. It bought out Liquila, owner of the Deepwater Aquila, for 11.9 million shares, and financed the rig with $325 million of 8.000% notes.
In April 2024 it issued $1.8 billion of unsecured notes due 2029 and 2031 and extended the revolver, with $510 million running to June 2028. In June it bought Hayfin's 67.0% of the joint venture owning Transocean Norge for 55.5 million shares and $130 million of notes, taking share capital to 940,828,901. New contracts for Invictus, Atlas and Conqueror followed.
2025: Equity to clear 2027 debt
In July 2025 holders swapped about $157 million of 4.0% exchangeable bonds for about 59 million shares. In September Transocean sold 143,750,000 shares at $3.05, including the underwriters' option, to repay debt including part of the 8.00% notes due 2027. It then closed $500 million of 7.875% notes due 2032 on October 15 and tendered for $104.8 million of older notes.
2026: The Valaris merger
On February 9, 2026 Transocean agreed to acquire Valaris at 15.235 Transocean shares per Valaris share, leaving Transocean holders with about 53% of the combined company and Valaris holders about 47%. In March it repaid the Titan notes in full. April brought about $1.0 billion of Petrobras and Vår Energi backlog, plus a Corcovado extension. The US Department of Justice issued a Second Request on May 4, and a preliminary joint proxy followed on May 19. On June 30 an Equinor agreement for three rigs, worth over $1 billion, was announced, conditional on license approvals.
As of that date, US foreign-investment clearance for the Valaris deal had been received on June 29, but the antitrust review was open and completion was still expected in the second half of 2026. The fleet stood at 27 units.
Written from the 73 story beats below (2016 to 1 July 2026), which come from the company's own announcements and filings.