Companies which oppose passage of Referendum 74, which would uphold a gay marriage law approved by Washington state lawmakers, are keeping silent on the issue.

One such company is Breier-Scheetz Properties, an apartment-management company which donated $20,000 in August to Preserve Marriage Washington, the campaign working to repeal the marriage law.

According to the Puget Sound Business Journal, the company has refused to discuss the issue and company representatives who answered the phone repeatedly hung up on reporters asking.

Other companies opposed to the law have also refused to discuss their donations, including technology company Inrix and Seattle developer Murray Franklyn. Inrix CEO Bryan Mistele and Murray Franklyn President George Reece each donated $5,000 to Preserve Marriage Washington.

Louise Chernin, president and CEO of the Greater Seattle Business Association (GSBA), which supports gay nuptials, said that some businesses opposed to Referendum 74 might be keeping quiet out of concern about a backlash.

“They have to fear being a business that represents values that are not embraced by the majority of the population in Washington,” said Chernin. “Do they really want to be seen as not supporting equality and stable family life? I think that would not be a smart thing to do.”

Opponents of marriage equality have launched national boycotts against three companies which have endorsed such unions: General Mills, T-Mobile and Starbucks.