Roblox (NYSE: RBLX) executive sells $250K in shares under plan

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Roblox Corp (RBLX) insider Mark Reinstra, Chief Legal Officer and Corporate Secretary, reported selling 6,250 shares of Class A Common Stock on 2026-08-19 at $40.00 per share in an open-market or private transaction. The sale was effected pursuant to a Rule 10b5-1 Plan adopted on February 19, 2026. Following this transaction, Reinstra held 415,998 shares directly, a portion of which are Restricted Stock Units, and also had additional indirect holdings through several personal and family trusts for which he or his spouse may be deemed to have beneficial ownership.

Positive

• None.

Negative

• None.

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InsiderReinstra Mark
RoleChief Legal Off. & Corp. Sec.
Sold6,250 shs ($250K)

Holdings After Transaction:

Class A Common Stock — 415,998 shares (Direct);

Class A Common Stock — 220,654 shares (Indirect, See footnote)
Footnotes (7)

1. F1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on February 19, 2026.
2. F2. A portion of these securities are Restricted Stock Units (“RSUs”). Each RSU represents a contingent right to receive one share of the Issuer’s Class A Common Stock.
3. F3. These shares are held directly by the San Domenico Trust dated August 12, 1999 for which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership over the securities held by the trust.
4. F4. These shares are held directly by the Mark L. Reinstra 2022 Annuity Trust for which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the securities held by the Annuity Trust.
5. F5. These shares are held directly by the Susan P. Reinstra 2022 Annuity Trust for which the Reporting Person serves as trustee. The spouse of the Reporting Person may be deemed to have beneficial ownership of the securities held by the Annuity Trust.
6. F6. These shares are held directly by the Mark L. Reinstra 2023 Annuity Trust for which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the securities held by the Annuity Trust.
7. F7. These shares are held directly by the Susan P. Reinstra 2023 Annuity Trust for which the Reporting Person serves as trustee. The spouse of the Reporting Person may be deemed to have beneficial ownership of the securities held by the Annuity Trust.

Shares sold6,250 sharesClass A Common Stock sold on 2026-08-19
Sale price per share$40.00Per-share price for 6,250 shares sold on 2026-08-19
Direct holdings after transaction415,998 sharesDirect Class A Common Stock holdings following sale; portion are RSUs
Net shares sold6,250 sharesNet sell direction in transaction summary
Rule 10b5-1 Planregulatory
“transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan”
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
Restricted Stock Units (“RSUs”)financial
“A portion of these securities are Restricted Stock Units (“RSUs”).”
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
beneficial ownershipfinancial
“The Reporting Person may be deemed to have beneficial ownership over the securities”
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Annuity Trustfinancial
“held directly by the Mark L. Reinstra 2022 Annuity Trust”

What insider transaction did RBLX executive Mark Reinstra report on this Form 4?

Mark Reinstra reported a sale of 6,250 shares of Roblox Corp Class A Common Stock on 2026-08-19 at $40.00 per share in an open-market or private transaction, under a pre-established Rule 10b5-1 trading plan.

Was the RBLX insider sale by Mark Reinstra under a Rule 10b5-1 plan?

Yes. The filing states that the transactions were effected pursuant to a Rule 10b5-1 Plan adopted by Mark Reinstra on February 19, 2026, indicating the trades were made under a pre-arranged trading plan.

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

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Available on EDGAR 08/20/2026 – 04:17 PM
Accepted by SEC EDGAR 08/20/2026 – 04:16 PM
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SEC Form 4