"Support" is a euphemism for Opened For. So Artists big themselves up for having done done so also by using the euphemistic phrase "Shared the Stage With." Usually, it's a handful of acts, which is great - for the exposure you're supposed to get (if people are in the house) - and the expanded name recognition you get (if you ensure your name is on the bill).

In "our" case - and as KRucial Reggae, we speak of Dub Station (the Label band or all-star players who've performed as players on KRucial sponsored events) - who's opened for a veritable who's who of Acts in the Industry:

Artists Supported, or Opened for...

Buju Banton     Beres Hammond     Black Uhuru     Culture (w/Joseph Hill)     Elephant Man     Itals (w/Keith Porter)   

Jimmy Cliff     John Browns Body     Meditations     Midnite     Michael Rose     Professor Nuts   

Ras Michael & The Sons of Negus     Sister Carol     Third World     Toots & the Maytals     Yellowman     the Wailers

...in Hip Hop:    Edo-G    Masta Ace    KRS-one