Mark Reinstra 10b5-1 sales disclosed (NYSE: RBLX)

Rhea-AI Filing Summary

RBLX insider filing reports Rule 144/10b5-1 sales by Mark Reinstra. The filing lists multiple brokered 10b5-1 dispositions of Common Stock, including sales on 04/13/2026, 05/20/2026, 05/21/2026, and 06/08/2026. The filing also lists Restricted Stock Unit entries dated 11/20/2024 and 05/20/2025.

Insights

Securities Attorney

Form 144 lists 10b5-1 sales and RSU entries for Mark Reinstra.

The excerpt documents Rule 144/10b5-1 dispositions of Common Stock on specified dates with per-trade share counts and proceeds. It also shows two Restricted Stock Unit entries with grant dates and unit counts.

These entries are procedural disclosures of reported sales under an established trading plan; cash-flow treatment is tied to the listed proceeds and brokered sales, as shown by the per-trade amounts.

Corporate Governance Analyst

Multiple scheduled dispositions are shown; no new corporate actions appear.

The filing lists four executed 10b5-1 sales with exact share counts and proceeds, and two RSU line items with unit counts and grant dates. There is no indication of pending corporate approvals or issuer-directed offerings in the excerpt.

Subsequent filings would show any changes to ownership or additional plan details.

Key Figures

Sale on 04/13/2026: 18,653 shares Proceeds 04/13/2026: $1,080,807.82 Sale on 05/20/2026: 17,275 shares +7 more

10 metrics

Sale on 04/13/2026 18,653 shares 10b5-1 sale on <date>04/13/2026</date>

Proceeds 04/13/2026 $1,080,807.82 Proceeds from 10b5-1 sale on <date>04/13/2026</date>

Sale on 05/20/2026 17,275 shares 10b5-1 sale on <date>05/20/2026</date>

Proceeds 05/20/2026 $782,169.62 Proceeds from 10b5-1 sale on <date>05/20/2026</date>

Sale on 05/21/2026 5,460 shares 10b5-1 sale on <date>05/21/2026</date>

Proceeds 05/21/2026 $253,356.56 Proceeds from 10b5-1 sale on <date>05/21/2026</date>

Sale on 06/08/2026 5,978 shares 10b5-1 sale on <date>06/08/2026</date>

Proceeds 06/08/2026 $249,342.38 Proceeds from 10b5-1 sale on <date>06/08/2026</date>

RSUs 11/20/2024 3,715 units Restricted Stock Units dated <date>11/20/2024</date>

RSUs 05/20/2025 797 units Restricted Stock Units dated <date>05/20/2025</date>

Key Terms

10b5-1, Restricted Stock Units, Rule 144

3 terms

10b5-1 regulatory

"10b5-1 Sales for MARK REINSTRA 3150 South Delaware"

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.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 3715 | 11/20/2024"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Rule 144 regulatory

"144: Securities To Be Sold"

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.

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Available on EDGAR 07/06/2026 - 04:25 PM Accepted by SEC EDGAR 07/06/2026 - 04:24 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	4512	250009.92	671595792	07/06/2026	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	11/20/2024	Restricted Stock Units	Issuer			3715	11/20/2024	N/A
Common	05/20/2025	Restricted Stock Units	Issuer			797	05/20/2025	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 MARK REINSTRA 3150 South Delaware Street San Mateo CA 94403	Common	06/08/2026	5978	249342.38
10b5-1 Sales for MARK REINSTRA 3150 South Delaware Street San Mateo CA 94403	Common	05/21/2026	5460	253356.56
MARK REINSTRA 3150 South Delaware Street San Mateo CA 94403	Common	05/20/2026	17275	782169.62
MARK REINSTRA 3150 South Delaware Street San Mateo CA 94403	Common	04/13/2026	18653	1080807.82

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 transactions does the RBLX Form 144 show?

The filing records multiple 10b5-1 sales by Mark Reinstra totaling individual trades on 04/13/2026, 05/20/2026, 05/21/2026, and 06/08/2026, each with reported share counts and proceeds.

How many shares were sold on 04/13/2026 in the RBLX filing?

The filing shows 18,653 shares sold on 04/13/2026 for $1,080,807.82, reported as a 10b5-1 sale by Mark Reinstra in the excerpt.

Does the Form 144 list any Restricted Stock Units for RBLX?

Yes. The excerpt lists Restricted Stock Units dated 11/20/2024 with 3,715 units and dated 05/20/2025 with 797 units attributed to the issuer entries.

Who executed the 10b5-1 sales disclosed in the RBLX excerpt?

The trades are reported for Mark Reinstra, with a mailing address shown and multiple 10b5-1 sales recorded on the dates included in the excerpt along with share counts and proceeds.

Are proceeds from the trades listed in the filing?

Yes. Each trade entry in the excerpt includes a proceeds figure, for example $782,169.62 for 05/20/2026 and $249,342.38 for 06/08/2026, shown alongside share counts.