Dropbox Andrew Houston trust plans $13.3M stock sale

Rhea-AI Filing Summary

DROPBOX, INC. (DBX) has a notice filed under Rule 144 indicating that the Andrew Houston Revocable Trust plans to sell up to 383,800 shares of common stock. The planned sale, described as Founders Shares acquired from the issuer, is to be executed through Morgan Stanley Smith Barney LLC on NASDAQ.

Key Figures

Shares to be sold under Rule 144: 383,800 shares Aggregate market value of planned sale: $13,275,642.00 Context share count: 150,561,680 shares +2 more

5 metrics

Shares to be sold under Rule 144 383,800 shares Planned sale by Andrew Houston Revocable Trust

Aggregate market value of planned sale $13,275,642.00 Approximate market value for 383,800 shares of common stock

Context share count 150,561,680 shares Share count referenced in the Rule 144 section

Shares acquisition date June 25, 2007 Acquisition date for the founders shares to be sold

Trading market NASDAQ Listed market for Dropbox common stock in the planned sale

Key Terms

Rule 144, Founders Shares, Revocable Trust, 10% Stockholder

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Founders Shares financial

"Common | 06/25/2007 | Founders Shares | Issuer"

Founders shares are a special block of a company’s stock originally given to the people who started the business; they often carry extra voting power or favorable terms compared with regular shares. For investors, these shares matter because they concentrate control and influence how future funding, ownership dilution, and decision-making will play out—think of founders shares as the steering wheel that can steer a company’s direction even as more passengers (investors) climb aboard.

Revocable Trust financial

"Name of Person for Whose Account the Securities are To Be Sold | ANDREW HOUSTON REVOCABLE TRUST"

A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.

10% Stockholder regulatory

"Director Officer 10% Stockholder"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for DROPBOX, INC. (DBX)?

It discloses that the Andrew Houston Revocable Trust intends to sell up to 383,800 shares of Dropbox common stock under Rule 144, with the shares described as Founders Shares originally acquired from the issuer.

How many DROPBOX, INC. (DBX) shares are planned to be sold under this Form 144?

The filing states that up to 383,800 shares of Dropbox common stock are planned to be sold for the account of the Andrew Houston Revocable Trust.

What is the approximate aggregate value of the DBX shares in this Form 144 notice?

The Form 144 lists an approximate aggregate market value of $13,275,642.00 for the planned sale of 383,800 shares of Dropbox common stock.

How were the DROPBOX, INC. (DBX) shares described in the Form 144 acquired?

The shares are described as Founders Shares acquired from the issuer, with an acquisition date of June 25, 2007 given in the filing.

Which broker is listed for executing the planned DBX Rule 144 sale?

The planned sale of Dropbox common stock is listed as being through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

What share count for DROPBOX, INC. is mentioned in the Form 144 context?

The filing references 150,561,680 shares of Dropbox common stock in connection with the Rule 144 calculations, presented as a share count context figure.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/10/2026 - 04:42 PM Accepted by SEC EDGAR 09/10/2026 - 04:42 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001734563
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	DROPBOX INC
SEC File Number	001-38434
Address of Issuer	50 Hawthorne Street San Francisco CALIFORNIA 94105
Phone	4159307766
Name of Person for Whose Account the Securities are To Be Sold	ANDREW HOUSTON REVOCABLE TRUST
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director
Relationship to Issuer	Officer
Relationship to Issuer	10% Stockholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	383800	13275642.00	150561680	09/10/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/25/2007	Founders Shares	Issuer			383800	06/25/2007	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/10/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/11/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Andrew Houston
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)