Baszucki 10b5-1 sales reported for RBLX (RBLX)

Rhea-AI Filing Summary

Rule 144 notice filed for proposed sales of Common Stock by Greg Baszucki and an affiliated trust. The filing lists sales dated 06/01/2026 and 05/05/2026, each showing 8,333 shares and gross amounts of $388,569.46 and $374,711.68 respectively. The entries identify a 10b5-1 plan as the method for the reported sales.

Key Figures

Shares per transaction: 8,333 shares Gross proceeds (06/01/2026): $388,569.46 Gross proceeds (05/05/2026): $374,711.68

3 metrics

Shares per transaction 8,333 shares listed on each visible transaction line

Gross proceeds (06/01/2026) $388,569.46 10b5-1 Sales entry dated 06/01/2026

Gross proceeds (05/05/2026) $374,711.68 10b5-1 Sales entry dated 05/05/2026

Key Terms

10b5-1 Sales, Form 144, Founders Shares

3 terms

10b5-1 Sales regulatory

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

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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.

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.

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Available on EDGAR 07/01/2026 - 05:01 PM Accepted by SEC EDGAR 07/01/2026 - 05:01 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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	453148.54	671595792	07/01/2026	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	06/01/2026	8333	388569.46
10b5-1 Sales for GREG AND CHRISTINA BASZUCKI LIV TR 3150 South Delaware Street San Mateo CA 94403	Common	06/01/2026	8333	388569.46
10b5-1 Sales for GREG BASZUCKI 3150 South Delaware Street San Mateo CA 94403	Common	05/05/2026	8333	374711.68
10b5-1 Sales for GREG AND CHRISTINA BASZUCKI LIV TR 3150 South Delaware Street San Mateo CA 94403	Common	05/05/2026	8333	374711.68

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the RBLX Form 144 show about Greg Baszucki sales?

The Form 144 lists proposed sales by Greg Baszucki and an affiliated trust. It shows 8,333 shares on 06/01/2026 with gross proceeds of $388,569.46, and similar entries on 05/05/2026.

Were the reported RBLX sales executed under a trading plan?

Yes. The filing repeatedly identifies the transactions as 10b5-1 Sales, indicating the sales were reported as conducted pursuant to a predefined trading plan, as stated in the entries.

How many shares per transaction are listed in the RBLX filing?

Each visible transaction in the excerpt lists 8,333 shares per line. The filing shows multiple dated entries with that same share count for both the individual and the trust.

What dollar amounts are shown for the May and June 2026 entries?

The excerpt shows gross proceeds of $374,711.68 for 05/05/2026 entries and $388,569.46 for 06/01/2026 entries tied to the 8,333 share lines.

Does this Form 144 indicate who receives the proceeds?

The excerpt lists the selling parties (Greg Baszucki and Greg and Christina Baszucki Living Trust) but does not state the recipient of proceeds beyond identifying the sellers in the filing.