STOCK TITAN

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

(Moderate)
(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.
Insider Reinstra Mark
Role Chief Legal Off. & Corp. Sec.
Sold 6,250 shs ($250K)
Type Security Shares Price Value
Sale Class A Common Stock F1, F2 6,250 $40.00 $250K
holding Class A Common Stock F3 -- -- --
holding Class A Common Stock F4 -- -- --
holding Class A Common Stock F5 -- -- --
holding Class A Common Stock F6 -- -- --
holding Class A Common Stock F7 -- -- --
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 sold 6,250 shares Class A Common Stock sold on 2026-08-19
Sale price per share $40.00 Per-share price for 6,250 shares sold on 2026-08-19
Direct holdings after transaction 415,998 shares Direct Class A Common Stock holdings following sale; portion are RSUs
Net shares sold 6,250 shares Net sell direction in transaction summary
Rule 10b5-1 Plan regulatory
"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 ownership financial
"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 Trust financial
"held directly by the Mark L. Reinstra 2022 Annuity Trust"

FAQ

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.

How many RBLX shares does Mark Reinstra hold directly after this transaction?

After the reported sale, Mark Reinstra held 415,998 shares of Roblox Corp Class A Common Stock directly. A portion of these directly held securities consists of Restricted Stock Units (RSUs), each representing a contingent right to receive one share.

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.

What was the total value of the RBLX shares sold by Mark Reinstra?

Mark Reinstra sold 6,250 shares at $40.00 per share, for a total transaction value of $250,000, based on the reported per-share sale price and share count in the Form 4.

Does Mark Reinstra have indirect ownership of RBLX shares through trusts?

Yes. The filing explains that additional Roblox Corp shares are held by several trusts, including the San Domenico Trust and various 2022 and 2023 annuity trusts, for which Reinstra or his spouse may be deemed to have beneficial ownership.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Reinstra Mark

(Last)(First)(Middle)
C/O ROBLOX CORPORATION
3150 S. DELAWARE ST.

(Street)
SAN MATEO CALIFORNIA 94403

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Roblox Corp [ RBLX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Legal Off. & Corp. Sec.
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock08/19/2026S(1)6,250D$40415,998(2)D
Class A Common Stock128,006ISee footnote(3)
Class A Common Stock12,786ISee Footnote(4)
Class A Common Stock12,786ISee Footnote(5)
Class A Common Stock33,538ISee footnote(6)
Class A Common Stock33,538ISee footnote(7)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. 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. 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. 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. 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. 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. 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. 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.
Remarks:
/s/ Mark Reinstra08/20/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)