The label has put out releases by bands including Tristan Psionic, Sianspheric, Shallow North Dakota, Eric's Trip, Hayden, Chore, Frank Black and the Catholics, A Northern Chorus, Raising the Fawn, Teenage Head, Simply Saucer, and Voivod.

[8] The event featured Another White Male, Choke To Start, Gorp, Hayden, hHead, Hip Club Groove, Kittens, Kottmeier, The Mercury Men, Monster Voodoo Machine, The New Grand, Poledo, Project 9, Rheostatics, Shallow, Sianspheric, Smoother, Sparkmarker, Treble Charger, and Tristan Psionic.

In honour of the label’s second anniversary, Sonic Unyon rented the 44-meter yacht Captain Matthew Flinders for a floating party tour of Toronto’s waters on September 17, 1995.

[10] The label, which had been operating out of a warehouse in Hamilton’s Corktown neighbourhood, was able to purchase the Wilson Street building after being granted a year of rent-free tenancy there.

[12] On October 3, 1998, Sonic Unyon marked the label’s fifth anniversary with a celebration that included the release of the Now We Are 5 compilation, the grand opening of the Sonic Unyon Record Store (located on the main level of 22 Wilson Street), an all-ages show at its headquarters, and a licensed concert in an upstairs hall of the nearby Fortune Village restaurant.

The latter concert featured sets from Blonde Redhead, Danko Jones, The Mooney Suzuki, The New Grand, Bill Priddle, Julie Doiron, Thrush Hermit, and Tristan Psionic.

[16] Sonic Unyon also ran hardcore label Goodfellow Records (active 1997-2009), as well as the more mainstream imprint Labwork Music (a joint effort with EMI Canada[17]), which released Wintersleep's Welcome to the Night Sky, the album that earned them a JUNO Award for New Group of the Year.

[20] Complementing the building's basement hardcore shows and in-store pop-ups, between 2002 and 2007 the label’s third floor space hosted concerts from dozens of bands including Alexisonfire, Frank Black and the Catholics, Converge, Cursed, The Evens, and Voivod.

In 2009, Sonic Unyon returned to event production at scale by organizing Supercrawl,[21] a free annual multi-arts festival dedicated to showcasing the arts scene in the James North region of Hamilton.

Sonic Unyon also produced the 2021 and 2023 Grey Cup Festivals, the 2023 and 2024 Polaris Music Prize Galas and the 2023 edition of CBC Toronto's Sounds of the Season.

[25][26] In 2019, the label released a triple-LP vinyl retrospective, Now We Are 25, as well as a documentary of the same name that featured appearances from artists Joel Plaskett of Thrush Hermit, Hayden, Chris Murphy and Jay Ferguson of Sloan, Terra Lightfoot, music media personalities George Stromboulopoulos and Alan Cross, and others.