Parkland survivor David Hogg is asking his followers to target Fox News host Laura Ingraham’s advertisers over a negative comment she made about rejections he’s received from colleges.

On Wednesday, Ingraham tweeted a Daily Wire story about Hogg getting turned down from four colleges he applied to.

“David Hogg Rejected By Four Colleges To Which He Applied and whines about it. (Dinged by UCLA with a 4.1 GPA...totally predictable given acceptance rates),” she wrote.

Hogg responded to Ingraham later that day, tweeting, “Soooo @IngrahamAngle what are your biggest advertisers...asking for a friend. #BoycottIngramAdverts.”

He then tweeted a list of 12 of Ingraham’s advertisers, which includes Arby’s, Hulu, Trip Advisor, AT&T, Allstate, and more. He also asked his followers to contact those companies.

On Thursday, Ingraham apologized to Hogg in a series of Tweets, where she seemed to also pat herself on the back in the process.

Since the Parkland shooting at Marjory Stoneman Douglas on Feb. 14, which left 17 people dead, Hogg has become a national figure and prominent student activist. He helped spearhead the March for Our Lives in D.C. on March 24. 

In the past, Hogg has used his massive Twitter following to his advantage, prompting Delta and United Airlines to cut ties with the NRA, and calling on spring breakers to boycott Florida so legislators will be forced to revise gun control policy in his home state.

Many called Ingraham out for being so critical of Hogg’s college rejections, including politicians and lawmakers.