Arkady Romanovich Rotenberg (Russian: Аркадий Романович Ротенберг; born 15 December 1951) is a Russian billionaire businessman and oligarch. With his brother Boris Rotenberg, he was co-owner of the Stroygazmontazh (S.G.M. group), the largest construction company for gas pipelines and electrical power supply lines in Russia.

In 2023, Forbes estimated Rotenberg's wealth at $3.5 billion. He is a close confidant, business partner, and childhood friend of president Vladimir Putin. Rotenberg became a billionaire through lucrative state-sponsored construction projects and oil pipelines. The Pandora Papers leak implicated Rotenberg in facilitating and maintaining elaborate networks of offshore wealth for Russian political and economic elites.

Since 2014, following the Russian annexation of Crimea, Arkady Rotenberg has been subject to sanctions by the United States government.

Rotenberg is Jewish. He was born in 1951 in Leningrad, where his father, Roman, worked in management at the Red Dawn telephone factory, allowing the family to avoid living in a communal apartment. In 1963, when he was age twelve, Rotenberg and Vladimir Putin both joined Anatoly Rakhlin's sambo club.

In 1978, Rotenberg graduated from the Lesgaft National State University of Physical Education, Sport and Health and became a judo trainer. After Putin returned to Russia in 1990, Rotenberg trained with him several times a week. During the 1990s, Rotenberg and his brother, Boris, who had moved to Finland, traded in petroleum products. When Putin became vice-mayor, Rotenberg secured funding from Gennady Timchenko to found Yavara-Neva, a professional judo club. Later, after the club won nine European Judo Championships and trained four Olympic champions, it was given a new state-funded $180 million facility, including a thousand-seat arena and a yacht club.

In 2000, Putin, who had become President of Russia, created Rosspirtprom, a state-owned enterprise controlling 30% of Russia's vodka market, and put Rotenberg in control. In 2001, Rotenberg and his brother founded the SMP bank (Russian: банк «Северный морской путь»), which operates in 40 Russian cities with over 100 branches, more than half of them in the Moscow area. SMP oversees the operation of more than 900 ATM-machines. SMP bank also became a leading large-diameter gas pipe supplier.

Gazprom often appears to have paid Rotenberg inflated prices. In 2007, Gazprom rejected an earlier plan to build a 350-mile pipeline and instead paid Rotenberg $45 billion, 300% of ordinary costs, to build a 1,500 mile pipeline to the Arctic Circle. In 2008, Rotenberg formed Stroygazmontazh (SGM) with five companies he had purchased from Gazprom for $348 million. In 2009, the company earned over $2 billion in revenue.

Rotenberg then bought Northern Europe Pipe Project, which eventually supplied 90% of Gazprom's large diameter pipes and operated at a 30% profit margin, twice the industry average. In 2013, Gazprom increased Rotenberg's contract for a Krasnodar pipeline by 45%, then continued payments for a year after the Bulgarian segment was canceled.