A few days after Dropbox filing for an IPO, here is Spotify. Their F-1 can be found here. The data from the filing document is not exhaustive enough for me, many pas financing rounds are not described but the Luxembourg register of commerce helps too.

Spotify founders Martin Lorentzon and Daniel Ek

Just like for Dropbox, this is a filing only, so the price per share is tentative and the valuation is not fixed yet. The price per share could probably go from €20 to €100…