The Republican detailed the returns in a campaign filing submitted late Tuesday night.
The move comes after The Atlanta Journal-Constitution found that the two Georgia insurance companies sent the money into Oxendine's campaign through 10 Alabama-based political action committees.
Georgia law forbids public officials from taking money from the companies they regulate.
Oxendine has said in a statement that he had requested an advisory opinion from the state ethics officials days before the newspaper's story ran in May. He had called the story a "hit piece."