DBX: Form 144 reports insider share sales

DBX reported Rule 144 sales by an affiliated trust and filing activity for founder shares.

Rhea-AI Filing Summary

DBX reported Rule 144 sales by an affiliated trust and filing activity for founder shares. The excerpt lists three 10b5-1 sales by The Andrew Houston Revocable Trust on 03/02/2026, 04/01/2026, and 05/14/2026 with share counts and gross proceeds reported. The filing also references founder/common shares associated with the issuer.

Insights

Equity Compliance Analyst

Routine resale activity under Rule 144 and 10b5-1 plans is disclosed.

The excerpt documents three 10b5-1 sales by The Andrew Houston Revocable Trust on 03/02/2026 (109,498 shares, $2,731,361.98), 04/01/2026 (111,166 shares, $2,544,602.08), and 05/14/2026 (37,498 shares, $973,547.42).

These entries are compliance disclosures of secondary dispositions; cash‑flow treatment indicates proceeds were generated by the selling trust. Subsequent filings may provide additional holder identities or confirm whether sales were pursuant to pre‑arranged plans.

Key Figures

Sale on 03/02/2026: 109,498 shares Proceeds on 03/02/2026: $2,731,361.98 Sale on 04/01/2026: 111,166 shares +3 more

6 metrics

Sale on 03/02/2026 109,498 shares <date>03/02/2026</date> 10b5-1 sale

Proceeds on 03/02/2026 <money>$2,731,361.98</money> Gross proceeds reported for the 03/02/2026 sale

Sale on 04/01/2026 111,166 shares <date>04/01/2026</date> 10b5-1 sale

Proceeds on 04/01/2026 <money>$2,544,602.08</money> Gross proceeds reported for the 04/01/2026 sale

Sale on 05/14/2026 37,498 shares <date>05/14/2026</date> 10b5-1 sale

Proceeds on 05/14/2026 <money>$973,547.42</money> Gross proceeds reported for the 05/14/2026 sale

Key Terms

10b5-1, Rule 144 / Form 144, Founders Shares

3 terms

10b5-1 regulatory

"10b5-1 Sales for THE ANDREW HOUSTON REVOCABLE TRUST 1800 Owens Street"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Rule 144 / Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

Founders Shares market

"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.

FAQ

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

What does the DBX Form 144 disclose about recent insider activity?

It discloses three 10b5-1 sales by The Andrew Houston Revocable Trust on 03/02/2026, 04/01/2026, and 05/14/2026. The filing lists share counts of 109,498, 111,166, and 37,498 with reported gross proceeds.

How many shares were sold by the trust in each reported DBX transaction?

The filing lists three transactions: 109,498 shares on 03/02/2026, 111,166 shares on 04/01/2026, and 37,498 shares on 05/14/2026. Each row includes the corresponding gross proceeds.

What proceeds were reported for the May 14, 2026 DBX sale?

The 05/14/2026 sale by the trust shows reported gross proceeds of $973,547.42 for 37,498 shares. The entry appears as a 10b5-1 sale disclosed on the Form 144 excerpt.

Does the Form 144 show whether these were planned sales or open‑market trades?

Each listed transaction is labeled as a 10b5-1 Sale, indicating they were executed under written trading plans. The excerpt labels them as 10b5-1 sales but does not include additional plan terms or broker details.

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

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Accepted by SEC EDGAR 05/18/2026 - 04:30 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	1800 Owens Street San Francisco CALIFORNIA 94158
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	30332	813504.24	158037382	05/18/2026	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			30332	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for THE ANDREW HOUSTON REVOCABLE TRUST 1800 Owens Street San Francisco CA 94158	Common	05/14/2026	37498	973547.42
10b5-1 Sales for THE ANDREW HOUSTON REVOCABLE TRUST 1800 Owens Street San Francisco CA 94158	Common	04/01/2026	111166	2544602.08
10b5-1 Sales for THE ANDREW HOUSTON REVOCABLE TRUST 1800 Owens Street San Francisco CA 94158	Common	03/02/2026	109498	2731361.98

144: Remarks and Signature

Remarks
Date of Notice	05/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/12/2025
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)