Bayon TV said it collected more than $2.5 million in the week following the deadly bridge stampede.
The seven-day ceremony is meant to put the souls of the dead at ease.
The Diamond Bridge stampede left 351 dead and 395 injured at last count, one of the worst disasters in Cambodia, in decades.
Prime Minister Hun Sen said on Monday no one would be fired as a result of the disaster, and that no single person deserved the blame.
Monday marked the seven-day funeral ceremonies for the 351 casualties, a figure revised upward Monday from 345.
Cambodian-Americans gathered at their embassy in Washington on Wednesday to pay their respects to those who died on Diamond bridge.
People were pressed from all sides on the bridge, three survivors of the tragedy, which claimed 347 lives, told “Hello VOA” on Thursday.
By Friday evening, Bayon TV had raised more than $1.08 million and CTN had brought in more than $500,000.
With the official figure at 347 dead, opposition lawmaker, Mu Sochua said the cause of the disaster must be uncovered and dealt with.
For some, the bridge had become an icon of fear to be avoided.
Phnom Penh authorities will build a memorial on Diamond Island for the dead.
Officials say at least 378 people were killed during a crowd stampede on a bridge near Diamond Island, following the Water Festival.
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