Action News was there as Joseph Cavanaugh, 21, was taken into custody at his home in Levittown, Pa. on Friday morning.
The meetups drew hundreds of people to the city, leading to reckless driving and other dangerous behavior overnight between Sept. 21 and Sept. 22. One police officer was injured.
"This is a very significant arrest today. He's pretty much the top of the organization when it comes to planning the event," said Lt Dennis Rosenbaum of the Philadelphia Police Dept. "This has been a month-long investigation with several more arrests to come."
Another man, 20-year-old James Hare of Philadelphia, was also arrested Friday for his involvement in the chaos.
Hundreds of people and vehicles gathered for approximately a dozen car meetups that ended with thousands of dollars in damage and a police officer injured.
The meetups spanned across the city, from Northeast Philadelphia to South Philadelphia, and ended with more than 100 vehicles at City Hall.
Illegal car meetups lead to violence across Philadelphia; 1 officer injured in crash
Eight arrests have been made so far.
Two weeks ago, police arrested 18-year-old Shane Thomas in Plymouth Township. Police say Thomas was the person seen on video wearing a banana costume at the event.
Thomas was allegedly seen committing a string of crimes, including damaging at least one police vehicle.
Man who allegedly damaged a police vehicle while wearing a banana costume arrested