The last two defendants convicted for helping disgraced financier R. Allen Stanford bilk investors out of more than $US7 billion ($A6.80 billion) in one of the biggest Ponzi schemes in US history have each been sentenced to 20 years prison.
Lawyers for Gilbert Lopez Jr, the ex-chief accounting officer for one of Stanford's companies, and Mark Kuhrt, the ex-global controller for another company, had asked for lesser terms.
The two argued that their clients were not as culpable as two other former executives who received significantly smaller sentences.
Jack Zimmermann, Lopez's lawyer, told US District Judge David Hittner on Thursday his client was "down the chain" of Stanford's business empire and "had no decision making authority in any of the things that ran this fraud".
Richard Kuniansky, Kuhrt's lawyer, said his client had believed Stanford legitimately borrowed investor funds and was going to pay the money back.
Lopez and Kuhrt were both convicted at trial last year of conspiracy to commit wire fraud and nine counts of wire fraud.
Hittner sentenced each to 20 years for each count, to be served at the same time. The judge also fined Lopez $US25,000, but waived a fine for Kuhrt.
Lopez, 70, covered his face with his hands after being sentenced, while Kuhrt, 40, stared down at the floor with his eyes closed.
Family members who were in the courtroom cried after the sentences were announced.
Lopez's lawyer had asked for a three-year prison term, asking for leniency in part based on his client's age. Kuhrt's lawyer had asked for five years.
Prosecutors said Stanford, a one-time billionaire, persuaded investors to buy certificates of deposit from his bank on the Caribbean island nation of in Antigua.
He then used that money to bankroll a string of failed businesses and his lavish lifestyle, which included yachts, a fleet of private jets and sponsorship of cricket tournaments.
Authorities said Stanford and others in his companies lied to investors from more than 100 countries, telling them their funds were being safely invested in stocks, bonds and other securities.Prosecutor Jeffrey Goldberg told Hittner both Lopez and Kuhrt helped hide the massive fraud by misrepresenting to investors in reports and other documents that their money was safe and Stanford's bank was on solid financial ground.