"Evolve" is rock's most popular album in the first half of 2018.

It’s all about Imagine Dragons on Nielsen Music’s mid-year 2018 rock charts, as the band leads multiple lists thanks to the continuing popularity of the group’s Evolve album and its singles.

In the tracking period of Dec. 29, 2017, through June 28, 2018, Imagine Dragons’ 2017 album Evolve ranks as the most popular rock album in the U.S. During the first six months of the year, the set earned 634,000 equivalent album units. The set also finished the first six months of the year as the second-largest-selling album, with 194,000 copies sold (behind only Dave Matthews Band’s Come Tomorrow, with 316,000 sold).

Equivalent album units are comprised of traditional album sales, track equivalent albums (TEA) and streaming equivalent albums (SEA). Each unit -- through June 28, ahead of the previously announced weighting change -- equaled one album sale, or 10 individual tracks sold from one album, or 1,500 on-demand audio streams generated by songs on an album. (For the sake of clarity, equivalent album units do not include listening to music on broadcast radio or digital radio broadcasts.)

Notably, four out of the top 10 most popular rock albums so far in 2018 are greatest-hits compilations. Elton John’s Diamonds (No. 5), Queen’s Greatest Hits (No. 7), Five Finger Death Punch’s A Decade of Destruction (No. 8) and Tom Petty & The Heartbreakers’ Greatest Hits (No. 9).

Imagine Dragons’ Evolve single “Whatever It Takes” was the top-selling digital rock song of the first six months of 2018, with 617,000 downloads sold. The album’s lead single, “Believer,” rules as the top on-demand rock streaming song (audio and video streams combined; 297.2 million streams), as well as the top on-demand rock audio song stream (140.4 million) and on-demand rock video stream (156.8 million).

Overall equivalent album units for the rock genre totaled 61.51 million for the first half of the year -- up 6.6 percent. Traditional album sales fell 9.3 percent to 26.59 million, while rock digital song sales dropped 24 percent to 47.74 million.

Total rock on-demand streams grew 31.9 percent to 59.03 billion, while audio alone jumped 36.6 percent to 45.22 billion and video alone increased 18.7 percent to 13.81 billion.

2018’s Mid-Year Top 10 Rock Albums (Based on Overall Equivalent Album Units*)

1. Imagine Dragons, Evolve (634,000)

2. Dave Matthews Band, Come Tomorrow (332,000)

3. Fall Out Boy, Mania (233,000)

4. Panic! at the Disco, Pray for the Wicked (232,000)

5. Elton John, Diamonds (229,000)

6. Imagine Dragons, Night Visions (213,000)

7. Queen, Greatest Hits (201,000)

8. Five Finger Death Punch, A Decade of Destruction (198,000)

9. Tom Petty & The Heartbreakers, Greatest Hits (190,000)

10. Twenty One Pilots, Blurryface (189,000)

2018’s Mid-Year Top 10 Selling Rock Albums

1. Dave Matthews Band, Come Tomorrow (316,000)

2. Imagine Dragons, Evolve (194,000)

3. Fall Out Boy, Mania (162,000)

4. Jack White, Boarding House Reach (159,000)

5. Panic! at the Disco, Pray for the Wicked (151,000)

6. Metallica, Hardwired… To Self-Destruct (142,000)

7. Breaking Benjamin, Ember (123,000)

8. Greta Van Fleet, From the Fires (109,000)

9. Soundtrack, Guardians of the Galaxy, Vol. 2: Awesome Mix Vol. 2 (106,000)

10. Five Finger Death Punch, And Justice for None (100,000)

2018’s Mid-Year Top 10 Selling Digital Rock Songs

1. Imagine Dragons, “Whatever It Takes” (617,000)

2. Imagine Dragons, “Thunder” (579,000)

3. Bad Wolves, “Zombie” (394,000)

4. Portugal. The Man, “Feel It Still” (332,000)

5. Imagine Dragons, “Believer” (297,000)

6. Alice Merton, “No Roots” (207,000)

7. Foster the People, “Sit Next to Me” (190,000)

8. Disturbed, “The Sound of Silence” (137,000)

9. Walk the Moon, “One Foot” (132,000)

10. Panic! at the Disco, “Say Amen (Saturday Night)” (118,000)

2018’s Mid-Year Top 10 On-Demand Rock Song Streams (Audio and Video Combined)

1. Imagine Dragons, “Believer” (297,207,000)

2. Imagine Dragons, “Thunder” (274,866,000)

3. Portugal. The Man, “Feel It Still” (159,715,000)

4. Imagine Dragons, “Whatever It Takes” (115,928,000)

5. Imagine Dragons, “Radioactive” (113,624,000)

6. Twenty One Pilots, “Heathens” (104,328,000)

7. Foster the People, “Pumped Up Kicks” (95,335,000)

8. Twenty One Pilots, “Stressed Out” (94,329,000)

9. Skillet, “Monster” (89,728,000)

9. Bad Wolves, “Zombie” (85,529,000)

2018’s Mid-Year Top 10 On-Demand Rock Audio Streams

1. Imagine Dragons, “Believer” (140,419,000)

2. Imagine Dragons, “Thunder” (133,858,000)

3. Portugal. The Man, “Feel It Still” (125,125,000)

4. Imagine Dragons, “Whatever It Takes” (86,198,000)

5. Imagine Dragons, “Radioactive” (65,491,000)

6. Foster the People, “Sit Next to Me” (61,634,000)

7. Journey, “Don’t Stop Believin’” (56,742,000)

8. The Killers, “Mr. Brightside” (55,308,000)

9. Eagles, “Hotel California” (53,561,000)

10. Imagine Dragons, “Demons” (53,039,000)

2018’s Mid-Year Top 10 On-Demand Rock Video Streams

1. Imagine Dragons, “Believer” (156,789,000)

2. Imagine Dragons, “Thunder” (141,008,000)

3. Skillet, “Monster” (67,597,000)

4. Smash Mouth, “All Star” (55,234,000)

5. Twenty One Pilots, “Heathens” (53,138,000)

6. Foster the People, “Pumped Up Kicks” (51,639,000)

7. Bad Wolves, “Zombie” (50,085,000)

8. Lynyrd Skynyrd, “Simple Man” (48,318,000)

9. Imagine Dragons, “Radioactive” (48,133,000)

10. Twenty One Pilots, “Stressed Out” (47,997,000)

Source: Nielsen Music, for the tracking period of Dec. 29, 2017 – June 28, 2018.

* Note: Nielsen Music’s consumption unit totals for albums include SEA and TEA for an album's songs registered before an album's release, but during the tracking period.