Matrekis has had 4 concerts.

Matrekis is most often considered to be Hard Rock.

The last Matrekis concert was on July 13, 2017 at Chippewa Valley Festival Grounds in Cadott, Wisconsin, United States. The bands that performed were: Korn / Avenged Sevenfold / Shinedown / Megadeth / Rob Zombie / Stone Sour / Slayer / Volbeat / Lamb of God / Anthrax / Lit / Thousand Foot Krutch / Sevendust / Insane Clown Posse / Ratt / Clutch / Hellyeah / Lita Ford / Badflower / Mushroomhead / Faster Pussycat / Emperor / Gemini Syndrome / Devour the Day / Texas Hippie Coalition / Lacey Sturm / Bobaflex / Seasons After / one less reason / The Nearly Deads / Tom Keifer / Jack Russell's Great White / Shallow Side / Vimic / Failure Anthem / Zealots / City of the Weak / Via / Scattered Hamlet / nuisance / Motley 2 / Rachel Lorin / Emergent / Wrecked / Scarlet Canary / Veilside / Crown Jewels / My Memory Remains / Probable Cause / Ignescent / OBLIVIOUS SIGNAL / Antistar / Fall II Rise / Awaken The Shadow / Matrekis / Stare Across.