Dropbox Co-Founder Houston Files to Sell Another $12M in Shares
DBX sits 57% above its 52-week low of $21.695.
Summary
Dropbox co-founder Andrew Houston's trust filed to sell 354,300 shares (~$12M), following a $13.4M sale three weeks earlier. Part of a broader insider distribution pattern.
Key Events · Ownership and Investor Activity · DBX
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Houston Trust Files New $12M Sale
Andrew Houston Revocable Trust filed a Form 144 to sell 354,300 shares worth approximately $11.99 million, with an approximate sale date of 10/01/2026.
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Follows $13.4M Sale Three Weeks Ago
The same trust sold 383,800 shares for $13.44 million on 09/10/2026 under a 10b5-1 plan, bringing the combined recent disposal to roughly $25.4 million.
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Broader Insider Distribution
Insiders have sold a net $19.6 million in open-market shares over the past 90 days, with no open-market purchases, indicating a persistent distribution pattern.
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10b5-1 Plan Adopted June 2026
The sale is executed under a pre-existing 10b5-1 trading plan adopted on 06/11/2026, which provides a mechanical framework for the disposals.
Analysis · DBX · Technology
Andrew Houston's revocable trust has filed to sell 354,300 shares worth approximately $12 million, just three weeks after selling 383,800 shares for $13.4 million. The combined $25 million in planned and completed sales by the co-founder and 10% owner represents a significant distribution of stock, adding to the $19.6 million in net insider selling over the past 90 days. While the sales are executed under a pre-existing 10b5-1 plan adopted in June 2026, the sheer size and frequency of Houston's disposals stand out against a backdrop of declining profits and a recent security breach disclosure.
How filings like this one have moved
In the 30 days to Oct 16, 2026, 29.2% of the 1503 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.39%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, DBX was trading at $34.08 on NASDAQ in the Technology sector, with a market capitalization of approximately $7.4B. The 52-week trading range was $21.70 to $38.17. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.