RBLX (NYSE: RBLX) Form 144 details 20,834-share sale and 10b5-1 trades

Rhea-AI Filing Summary

David Baszucki has filed a Form 144 notice for the potential sale of up to 20,834 shares of common stock of a company whose shares trade on the NYSE under ticker RBLX. The filing lists Morgan Stanley Smith Barney LLC as broker and an approximate sale date of 12/18/2025, with the shares to be sold on the NYSE. These shares were originally acquired on 04/06/2004 as founders shares from the issuer.

The notice also reports that the issuer has 654,855,044 shares of common stock outstanding. Over the prior three months, related accounts sold common shares in several transactions, including 10,584 shares for gross proceeds of 1,008,013.01 on 11/20/2025 and 22,688 shares for 2,358,871.36 on 11/12/2025. Additional Rule 10b5‑1 plan sales include 46,062 shares for 4,815,081.96 for The Baszucki Family Foundation and 20,834 shares for 2,177,878.02 for The Freedom Revocable Trust, both on 11/11/2025.

Insights

Insider trading and ownership analyst

Routine Form 144 notice outlines planned and recent insider-related sales in RBLX.

The disclosure shows David Baszucki planning to sell up to 20,834 common shares of the RBLX-listed issuer through Morgan Stanley Smith Barney LLC, with an approximate trade date of 12/18/2025. The shares were acquired as founders shares on 04/06/2004, which indicates long-held equity rather than recent grants.

The filing also details prior three‑month sales: 10,584 and 22,688 common shares with gross proceeds of 1,008,013.01 and 2,358,871.36, plus Rule 10b5‑1 plan sales of 46,062 and 20,834 shares for The Baszucki Family Foundation and The Freedom Revocable Trust totaling several million dollars. These transactions are framed within standard Rule 144 and Rule 10b5‑1 processes, and the text explicitly includes a representation that the seller does not know undisclosed material adverse information about the issuer. Overall, this reads as structured diversification and philanthropy-related selling rather than a new, thesis-changing development.

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

Relationship to Issuer

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	20834	1789848.94	654855044	12/18/2025	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	04/06/2004	Founders Shares	Issuer			20834	04/06/2004	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
DAVID BASZUCKI 3150 South Delaware Street San Mateo CA 94403	Common	11/20/2025	10584	1008013.01
DAVID BASZUCKI 3150 South Delaware Street San Mateo CA 94403	Common	11/12/2025	22688	2358871.36
10b5-1 Sales for THE BASZUCKI FAMILY FOUNDATION 3150 South Delaware Street San Mateo CA 94403	Common	11/11/2025	46062	4815081.96
10b5-1 Sales for THE FREEDOM REVOCABLE TRUST 3150 South Delaware Street San Mateo CA 94403	Common	11/11/2025	20834	2177878.02

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

How many RBLX shares does David Baszucki plan to sell under this Form 144?

The Form 144 indicates a proposed sale of up to 20,834 shares of common stock through Morgan Stanley Smith Barney LLC, to be sold on the NYSE around 12/18/2025.

When and how were the Form 144 RBLX shares originally acquired?

The shares covered by this notice are common stock acquired on 04/06/2004 as founders shares from the issuer, with an acquisition amount of 20,834 shares.

How many RBLX shares are shown as outstanding in this Form 144 filing?

The filing reports that there are 654,855,044 shares of common stock outstanding for the issuer whose stock trades on the NYSE under ticker RBLX.

What recent RBLX stock sales by David Baszucki are disclosed?

The filing lists sales of 10,584 common shares for gross proceeds of 1,008,013.01 on 11/20/2025 and 22,688 common shares for 2,358,871.36 on 11/12/2025 by David Baszucki.

Which RBLX-related Rule 10b5-1 plan sales are included in the past 3 months?

The notice shows Rule 10b5‑1 sales on 11/11/2025 of 46,062 common shares for gross proceeds of 4,815,081.96 for The Baszucki Family Foundation and 20,834 common shares for 2,177,878.02 for The Freedom Revocable Trust.

What representation does the seller make about information on the RBLX issuer?

By signing the notice, the seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed, and this also applies as of any Rule 10b5‑1 plan adoption date.