By September 2017, following various hearings, all five men pleaded guilty to their roles in the global conspiracy.
On 2 November 2017, at the Old Bailey in London, Mereacre was sentenced to 10 years in prison whilst his second in command, Iurie Bivol, was sentenced to seven.
The court ruled that Sheth, Gincota and Serghei Bivol should be sentenced to four years, three years and eight months, and three years and five months respectively.
The judge in the case, Christopher Moss QC, described the fraudsers' scam as a "wholesale attack" on the integrity of the UK's banking system, the Daily Mail reported.
Moss said the sentencing decisions were based on the £6.9m investigators were able to trace in evidence. Previously, the NCA revealed that the true figure was significantly higher.
"Sheth abused his position of trust at the bank to knowingly open sham accounts for the network, providing a vital service which enabled them to launder £16m worth of stolen cash," Mike Hulett, head of operations at the NCA's cybercrime unit, said in September this year.
Speaking this week, Hulett said the sentencing was "the culmination of a complex, international investigation into professional money laundering networks here in the UK.
"With the support of the banking industry and law enforcement partners in the UK, the US, Romania and Moldova, we have successfully shut down these networks, causing major disruption to organised cybercriminals who will no longer have access to their stolen profits."
Barclays said: "This is a rare occasion where an individual deliberately exploited our systems."
A spokesperson added: "We have worked with and supported the NCA with this investigation and welcome the outcome of proceedings. Barclays will always support law enforcement in identifying criminal activity and bringing prosecutions."