Roblox (NYSE: RBLX) holder Mark Reinstra plans 6,250

Roblox (NYSE: RBLX) holder Mark Reinstra plans 6,250-share sale

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

Roblox Corp (RBLX) is the issuer for a Rule 144 notice filed in connection with planned sales of its common stock by Mark Reinstra. The notice lists a proposed sale of 6,250 shares of Roblox common stock through Morgan Stanley Smith Barney LLC, with a proposed aggregate sale price of $235,437.50 as of August 19, 2026. The shares were acquired upon the vesting of restricted stock units during the period from May 20, 2024 through August 20, 2024. The filing also details several prior sales of Roblox common stock by Mark Reinstra over the previous three months, including transactions under a Rule 10b5-1 trading plan.

Positive

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Negative

• None.

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Shares to be sold6,250 sharesPlanned sale of Roblox common stock listed in the Form 144
Proposed aggregate sale price$235,437.50Aggregate price for 6,250 Roblox shares in the planned sale as of 08/19/2026
Shares sold on 07/06/20264,512 shares10b5-1 sale of Roblox common stock by Mark Reinstra
Aggregate proceeds on 07/06/2026$258,733.42Total value of 4,512 Roblox shares sold under 10b5-1
Shares sold on 06/08/20265,978 shares10b5-1 sale of Roblox common stock by Mark Reinstra
Aggregate proceeds on 06/08/2026$249,342.38Total value of 5,978 Roblox shares sold under 10b5-1
Shares sold on 05/20/202617,275 sharesSale of Roblox common stock by Mark Reinstra not marked as 10b5-1
Aggregate proceeds on 05/20/2026$782,169.62Total value of 17,275 Roblox shares sold
Rule 144regulatory
“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.
restricted stock unitsfinancial
“The securities to be sold were acquired upon the vesting of restricted stock units”
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.
10b5-1 Salesregulatory
“10b5-1 Sales for MARK REINSTRA 3150 South Delaware Street”
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.

What does the Form 144 filing for RBLX by Mark Reinstra disclose?

The Form 144 for RBLX discloses that Mark Reinstra plans to sell 6,250 shares of Roblox common stock. The shares were acquired from vesting restricted stock units between May 20, 2024 and August 20, 2024, and the proposed aggregate sale price is $235,437.50.

What prior Roblox (RBLX) stock sales by Mark Reinstra are reported in the last three months?

The filing lists four prior Roblox (RBLX) sales: 4,512 shares for $258,733.42 on July 6, 2026; 5,978 shares for $249,342.38 on June 8, 2026; 5,460 shares for $253,356.56 on May 21, 2026; and 17,275 shares for $782,169.62 on May 20, 2026.

Are any of Mark Reinstra’s recent Roblox (RBLX) stock sales under a 10b5-1 plan?

Yes. The filing identifies several transactions as 10b5-1 sales for Mark Reinstra. These include sales of common stock on May 21, 2026, June 8, 2026, and July 6, 2026, each specifying share amounts and total sale values under a Rule 10b5-1 trading plan.

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

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Accepted by SEC EDGAR 08/19/2026 – 04:32 PM
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144: Filer Information

144: Issuer Information

144: Securities Information

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

* 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

144: Remarks and Signature