2 ms·> the largest IPO in history is Alibaba with $25B Facebook's IPO was much larger at $104Bby menzoic 10y ago> the largest IPO in history is Alibaba with $25B Facebook's IPO was much larger at $104Baneesh 10y agoDifferent metrics. Alibaba raised $25B. Facebook's market cap was around $104B (intraday) upon their IPO, but they only raised about $16B in the offering.yladiz 10y agoGoing by market cap, Alibaba was at $230B following the IPO (their shares were around $93).