One Killmail, Ten Billion ISK
The record is a single loss, not a fleet engagement: one Bowhead, no capital losses, no supercapital losses, no structures. The event category supplied is a skirmish, and the scale comes entirely from the price attached to that one hull. That figure is the individual killmail value, which is why a lone ship loss can sit alongside totals normally produced by far larger fights. Around 65 participants appear in the record.
The Name on the Final Blow
The killmail credit belongs to Painter Alt 2 of Goonswarm Federation, and Goonswarm Federation is also the attacker organisation listed against the loss. Those tallies describe the recorded killmail, not a wider engagement. On the other side of the ledger sits The Mickey Mouse Club, the victim organisation attached to the Bowhead. That is the whole of the sourced story: one expensive ship, one credited final blow, and no other losses recorded in this event.