The US-based group had challenged the companies to use their association with the Chinese Olympics to protest to the host government about its stance on Darfur.
Civil conflict in Darfur has so far claimed the lives of 200,000 people and displaced 2.5m in the last four years.
China has close ties with Sudan, from which it buys oil, and has blocked moves in the UN aimed at pressuring the Sudanese government to bring an end to the conflict in the region.
said none of the 19 sponsors contacted the Chinese government about its stance on war-torn Sudan.
It said the companies were guilty of engaging in "a form of silent complicity" by not challenging the Chinese government's attitude to the Darfur genocide.
The group used a marking system for all of the companies, based on their efforts to lobby or take action on Sudan, and for making donations to humanitarian organisations. It awarded an F to 13 of them, which included Samsung, Staples, Microsoft, Volkswagen, Swatch and Visa.
General Electric achieved the best grade overall, receiving a C+ for making $2m in contributions to aid efforts, contacting the International Olympic Committee about Sudan, and for "appearing to understand the situation".
Adidas and McDonald's were also awarded C grades for contacting the German foreign ministry and the IOC about the Darfur crisis.
Coca-Cola, Johnson & Johnson and United Parcel Service received D grades for their overall efforts. The group noted that Coca-Cola donated $750,000 to Red Cross and Red Crescent, and planned a series of shareholder forums about its business dealings in regions affected by war.
Ellen Freudenheim, corporate outreach director at Dream for Darfur, said: "We are demanding that multinational corporations have the decency to say to the Olympic host that the Darfur situation threatens their investments as sponsors, threatens the reputation of the games, and therefore is a matter of business concern, as well as a moral issue."
China's own human rights record, including its stance on the death penalty, prisoners of conscience, torture and freedom of speech, have also come under heavy criticism by campaign groups in the lead up to next year's Olympics.