Dropbox (DBX.O): Pillar 3 AI Infra Opportunity is Credible but Premature; D/G to Sell

We downgrade DBX to Sell from Neutral with a $29 TP. We come away from our deep dive of the AI storage infrastructure pivot ("Pillar 3") as an intriguing opportunity yet believe the current valuation derives too much success too early. We treat Pillar 3 as a long-dated call option, with a probability-weighted analysis estimating ~$3/share of value relative to a ~$12/share recovery from DBX's April lows, which we see as difficult to justify on fundamentals alone. Against a core FSS business that is showing signs of stabilization but has yet to establish a clear path to sustained growth, we view the current risk/reward as unfavorable at 20x '28 adj FCFe/sh (ex-SBC). Our $29 TP embeds the $3 Pillar 3 opp, valuing the core at 8x P/adj FCFe vs. low growth peers at 6-8x. We value Pillar 3 at ~$3/share on a probability-weighted basis, reflecting the unusually wide range of outcomes for a pre-revenue opportunity: a 30% probability to a bear case with zero value, 50% to a base case where Pillar