The company admitted in August that its bond traders had submitted illegal bids at Treasury note auctions.
Interserve were found to have engaged in illegal anti-competitive bid rigging activities and were fined a sum of £11,634,750.
The illegal bids continue to cost Salomon customers.
Salomon refused to disclose many details of the illegal bids, saying that it had been asked by Federal prosecutors not to make any additional information public.
The scandal involved billions of dollars of illegal bids in the multitrillion-dollar Treasury market.
The firm made comparatively little from the illegal bids, estimating last year that its illegal profits ran between $3.3 million and $4.6 million.
Salomon admitted that employees on its government trading desk had submitted numerous illegal bids, at times using customers' names to purchase securities without authorization.
It also acknowledged that four top executives had known of an illegal bid since April but failed to report it.
The scandal involved billions of dollars of illegal bids placed at Treasury auctions.
For comparison they provided profit figures made in auctions where there were no illegal bids, and they were higher.