Noble Corporation plc Acquires Diamond Offshore Drilling, Inc.

Maersk Drilling and Noble Corporation Agree to 50/50 Combination

November 10, 2021

Oil & Gas

The Drilling Company of 1972 A/S (Maersk Drilling) and Noble Corporation have entered into a definitive agreement to combine in a 50/50, primarily all‑stock transaction. The combined company will be named Noble Corporation, listed on the New York Stock Exchange and Nasdaq Copenhagen, and is expected to create a stronger customer proposition, deliver cost synergies and a modernized fleet.

ExxonMobil Acquires Denbury Inc.

November 2, 2023

Energy

Exxon Mobil Corporation completed its all‑stock acquisition of Denbury Inc. in a transaction valued at $4.9 billion, with Denbury shareholders receiving 0.84 shares of ExxonMobil per Denbury share. The deal adds Denbury's ~1,300 miles of CO2 pipelines, onshore sequestration sites and Gulf Coast/Rockies oil and gas operations (over 200 million boe of proved reserves and roughly 46,000–47,000 boe/d of production), strengthening ExxonMobil's Low Carbon Solutions and CCS capabilities.

Helix Energy Solutions Acquires Alliance Group of Companies

May 17, 2022

Energy

Helix Energy Solutions Group completed the acquisition of 100% of the equity interests in the Alliance group of companies, a Louisiana-based offshore shallow-water decommissioning and support-services provider, for $120 million in cash plus potential earnouts. The deal expands Helix's decommissioning and life-of-field maintenance capabilities and increases its presence on the Gulf of Mexico shelf as part of its Energy Transition strategy.

Transocean to Acquire Valaris in $5.8 Billion All-Stock Deal

February 9, 2026

Energy

Transocean and Valaris have signed a definitive agreement to combine in an all-stock transaction valued at approximately $5.8 billion, with Transocean acquiring Valaris. The deal is structured as a court-approved scheme of arrangement under Bermuda law and is expected to close in the second half of 2026, subject to regulatory and shareholder approvals.

Drilling Tools International Acquires Superior Drilling Products

March 7, 2024

Manufacturing

Drilling Tools International Corp. (DTI) agreed to acquire Superior Drilling Products, Inc. (SDP/SDPI) for approximately $32.2 million in cash and DTI stock, a deal approved by both companies' boards and expected to close in Q3 2024. The transaction brings SDP's Drill‑N‑Ream technology, PDC bit manufacturing and engineering capabilities into DTI to expand product offerings, capture manufacturing and distribution synergies, and support expansion—particularly in the Middle East.

OCI Acquires DRILLTOOLS

September 27, 2024

Manufacturing

OCI, LLC, a Brookville, Pennsylvania-based manufacturer and portfolio company of Grand Valley Holdings and Gemspring Capital, has acquired DRILLTOOLS, a Kilgore, Texas-based manufacturer of rotary drilling tools and excavation products. The acquisition expands OCI's product suite, manufacturing capabilities, and technical expertise to better serve infrastructure, utility, and commercial contractors; DRILLTOOLS will continue to operate from its Texas headquarters.