Roblox insider plans $344K sale of 8,333 shares

Rhea-AI Filing Summary

Roblox Corp (RBLX) received a Rule 144 notice indicating that Greg Baszucki, through Morgan Stanley Smith Barney LLC Executive Financial Services, plans to sell 8,333 shares of Roblox common stock on the NYSE, with an approximate aggregate market value of $344,069.57 as of September 1, 2026.

The shares are identified as Founders Shares originally acquired from the issuer on September 21, 2016. The notice also lists prior Rule 144 sales in the last three months by Greg Baszucki and the Greg and Christina Baszucki LIV Trust, each involving 8,333 shares of common stock on July 1, 2026 and August 4, 2026 under Rule 10b5-1 trading plans.

Key Figures

Shares to be sold: 8,333 shares of common stock Aggregate market value: $344,069.57 Date of acquisition of Founders Shares: 09/21/2016 +4 more

7 metrics

Shares to be sold 8,333 shares of common stock Proposed Rule 144 sale for Greg and Christina Baszucki LIV

Aggregate market value $344,069.57 Market value for 8,333 Roblox common shares as of 09/01/2026

Date of acquisition of Founders Shares 09/21/2016 Founders Shares originally acquired from Roblox Corporation

Prior sale consideration (08/04/2026) $312,190.01 10b5-1 sale of 8,333 common shares for Greg Baszucki on 08/04/2026

Prior sale consideration (07/01/2026) $480,695.77 10b5-1 sale of 8,333 common shares for Greg Baszucki on 07/01/2026

Shares per prior transaction 8,333 shares Each reported 10b5-1 sale in the past three months involved 8,333 shares

Signature date 09/01/2026 Date signed by /s/ Greg Baszucki on the notice

Key Terms

Rule 144, 10b5-1, Founders Shares, Form 144, +1 more

5 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.

10b5-1 regulatory

"10b5-1 Sales for GREG BASZUCKI 3150 South Delaware 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.

Founders Shares financial

"Common | 09/21/2016 | 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.

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

NYSE market

"344069.57 | 669992988 | 09/01/2026 | NYSE"

A large, regulated marketplace where stocks and other securities are listed and traded, acting like a global auction house that matches buyers and sellers and helps determine share prices. It matters to investors because listing and trading there provide liquidity, price discovery, and regulatory oversight—making it easier to buy or sell holdings and giving companies a visible platform that can affect credibility and access to capital.

FAQ

What does the Form 144 filing disclose for Roblox (RBLX)?

The filing discloses that Greg Baszucki has notified an intent under Rule 144 to sell 8,333 shares of Roblox common stock through Morgan Stanley Smith Barney LLC, with an indicated market value of about $344,069.57 as of September 1, 2026.

How many Roblox (RBLX) shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 8,333 shares of Roblox common stock. These are described as Founders Shares originally acquired from Roblox Corporation on September 21, 2016.

What is the approximate market value of the Roblox (RBLX) shares in this Form 144?

The shares covered by the notice have an indicated aggregate market value of $344,069.57, based on the price information given for 8,333 common shares of Roblox Corporation as of September 1, 2026.

Which broker is handling the proposed Roblox (RBLX) share sale?

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

What prior Roblox (RBLX) sales are reported in the last three months?

The filing lists multiple 10b5-1 sales of 8,333 shares each of Roblox common stock on July 1, 2026 and August 4, 2026 by Greg Baszucki and the Greg and Christina Baszucki LIV Trust, with consideration amounts of $312,190.01 and $480,695.77 for each respective date.

On which exchange are the Roblox (RBLX) shares in this filing traded?

The common shares referenced in the notice are stated as traded on the NYSE. The filing ties the proposed Rule 144 sale and related price information to Roblox Corporation common stock listed on that exchange.

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

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Available on EDGAR 09/01/2026 - 04:51 PM Accepted by SEC EDGAR 09/01/2026 - 04:51 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	0001834990
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	Roblox Corporation
SEC File Number	001-39763
Address of Issuer	3150 South Delaware Street San Mateo CALIFORNIA 94403
Phone	8888582569
Name of Person for Whose Account the Securities are To Be Sold	GREG AND CHRISTINA BASZUCKI LIV TR
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

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	8333	344069.57	669992988	09/01/2026	NYSE

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	09/21/2016	Founders Shares	Issuer			8333	09/21/2016	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 GREG BASZUCKI 3150 South Delaware Street San Mateo CA 94403	Common	08/04/2026	8333	312190.01
10b5-1 Sales for GREG AND CHRISTINA BASZUCKI LIV TR 3150 South Delaware Street San Mateo CA 94403	Common	08/04/2026	8333	312190.01
10b5-1 Sales for GREG BASZUCKI 3150 South Delaware Street San Mateo CA 94403	Common	07/01/2026	8333	480695.77
10b5-1 Sales for GREG AND CHRISTINA BASZUCKI LIV TR 3150 South Delaware Street San Mateo CA 94403	Common	07/01/2026	8333	480695.77

144: Remarks and Signature

Remarks
Date of Notice	09/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/28/2025
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/ Greg Baszucki
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)