Andrew Houston - 10 Sep 2026 Form 4 Insider Report for DROPBOX, INC. (DBX)

Reporting relationship: Co-CEO, Director, 10%+ Owner
Issuer ticker: DBX
Reported as of: 10 Sep 2026
Net transaction value: -$13,439,216
SEC form: 4
Accepted by SEC: 14 Sep 2026, 17:25:44 UTC
Prior SEC filing: 17 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Cara Angelmar, Attorney-in-Fact

Key filing fact

Andrew Houston filed Form 4 for DROPBOX, INC. (DBX) on 14 Sep 2026.

Key facts

This page summarizes Andrew Houston's Form 4 filing for DROPBOX, INC. (DBX).
4 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 14 Sep 2026, 17:25.

Change

Previous filing in this sequence was filed on 17 Jun 2026.
Current net transaction value: -$13,439,216.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001734563 Primary reporting owner

Houston Andrew

Relationship: Co-CEO, Director, 10%+ Owner
Address: 50 HAWTHORNE STREET, SAN FRANCISCO
Signature: /s/ Cara Angelmar, Attorney-in-Fact
Signature date: 14 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DBX transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +383,800
Change %
Price: $0.000000^*
Shares after: 383,800
Date: 10 Sep 2026
Ownership: See Footnote
Footnotes: F1, F2

DBX transaction

Class A Common Stock

Sale

Transaction value: $11,350,091
Shares: -324,432
Change %: -85%
Price: $34.98
Shares after: 59,368
Date: 10 Sep 2026
Ownership: See Footnote
Footnotes: F2, F3, F4

DBX transaction

Class A Common Stock

Sale

Transaction value: $2,089,124
Shares: -59,368
Change %: -100%
Price: $35.19
Shares after: 0
Date: 10 Sep 2026
Ownership: See Footnote
Footnotes: F2, F3, F5

DBX holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 8,266,666
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F6

DBX holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 716,728
Date: 10 Sep 2026
Ownership: See Footnote
Footnotes: F7

DBX holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 444,444
Date: 10 Sep 2026
Ownership: See Footnote
Footnotes: F8

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DBX transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -383,800
Change %: -0.58%
Price: $0.000000^*
Shares after: 65,944,829
Date: 10 Sep 2026
Ownership: See foonote
Underlying class: Class A Common Stock
Underlying amount: 383,800
Exercise price
Footnotes: F2, F9

DBX holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 7,608,764
Date: 10 Sep 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 7,608,764
Exercise price
Footnotes: F7, F9

DBX holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 500,500
Date: 10 Sep 2026
Ownership: See foonote
Underlying class: Class A Common Stock
Underlying amount: 500,500
Exercise price
Footnotes: F9, F10

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 10 footnotes

Footnote F1

383,800 shares of Class B Common Stock were converted into 383,800 shares of Class A Common Stock at the election of the Reporting Person and had no expiration date.

Footnote F2

Shares held by the Andrew Houston Revocable Trust u/a/d 9/7/2011, for which Reporting Person serves as trustee.

Footnote F3

These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 11, 2026.

Footnote F4

This transaction was executed in multiple trades at prices ranging from $34.15 to $35.145. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F5

This transaction was executed in multiple trades at prices ranging from $35.15 to $35.28. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F6

These securities are restricted stock awards of Class A Common Stock. The restricted stock awards vest over a period of up to ten years following the closing of the Issuer's initial public offering of Class A Common Stock, or March 27, 2028, upon achievement of service-based, market-based, and liquidity event-related performance vesting conditions.

Footnote F7

Shares held by the Houston Remainder Trust u/a/d 12/30/2010, for which Reporting Person serves as trustee.

Footnote F8

Shares held by The Erin Yu Houston Revocable Trust u/a/d 1/18/2024, for which the Reporting Person's spouse serves as trustee.

Footnote F9

The Issuer's Class B Common Stock is convertible into the Issuer's Class A Common Stock on a one-for-one basis at the Reporting Person's election and has no expiration date.

Footnote F10

Shares held by the Houston 2012 Irrevocable Children's Trust u/a/d 4/12/2012, for which Reporting Person serves as trustee.