The group becomes the seventh rock band to spend multiple weeks on top.

Tool returns to No. 1 on the Billboard Artist 100 chart (dated Sept. 14) to become the top musical act in the U.S. for a second total week, as the group's fifth LP, Fear Inoculum, debuts at No. 1 on the Billboard 200 with 270,000 equivalent album units, according to Nielsen Music.

The Artist 100 measures artist activity across key metrics of music consumption, blending album and track sales, radio airplay, streaming and social media fan interaction to provide a weekly multi-dimensional ranking of artist popularity.

The new set, Tool's first in 13 years, marks the group's third Billboard 200 No. 1. It launches with the biggest one-week total for a rock album (in both units and album sales) since Dave Matthews Band's Come Tomorrow in June 2018.

The group first hit No. 1 on the Artist 100 four weeks ago, after its catalog was made available on streaming and digital services for the first time.

Tool also becomes the seventh rock duo or group to have spent multiple weeks at No. 1 on the Artist 100 (dating to the list's 2014 inception), joining Twenty One Pilots (four weeks); Tom Petty & The Heartbreakers and Queen (three each); and Bon Jovi, Linkin Park and Mumford & Sons (two each).

Rounding out the Artist 100's top five, Taylor Swift dips to No. 2 after logging her record-extending 37th week at No. 1, Post Malone rises 4-3, Lana Del Rey re-enters at No. 4, as her new album Norman Fucking Rockwell! debuts at No. 3 on the Billboard 200, and Lizzo falls 2-5.

Check out this week's full Artist 100 chart here.