[Form 4] Roblox Corp Insider Trading Activity

Rhea-AI Filing Summary

Roblox Corp (RBLX): Insider transaction disclosed. Chief Legal Officer & Corporate Secretary Mark Reinstra reported an open‑market sale of 2,401 Class A shares at $104.6 on November 5, 2025, made under a Rule 10b5‑1 plan adopted on August 6, 2025.

Following the sale, he beneficially owned 387,314 shares directly. Indirect holdings shown include 120,272 shares (San Domenico Trust), 33,538 shares (Mark L. Reinstra 2023 Annuity Trust), 16,653 shares (Mark L. Reinstra 2022 Annuity Trust), 33,538 shares (Susan P. Reinstra 2023 Annuity Trust), and 16,653 shares (Susan P. Reinstra 2022 Annuity Trust).

The filing also notes transfers on November 5, 2025: 1,821 shares from each of the two 2023 annuity trusts were moved to the San Domenico Trust.

Insights

Governance & Insider Transactions Analyst

Routine 10b5‑1 sale with updated direct and trust holdings.

The report lists a sale of 2,401 shares at $104.6 on November 5, 2025, executed under a Rule 10b5‑1 plan adopted on August 6, 2025. Such plans pre‑schedule trades, reducing discretion at the time of sale.

Direct beneficial ownership stands at 387,314 shares. The filing itemizes additional indirect positions held via family trusts, plus same‑day transfers of 1,821 shares from each 2023 annuity trust to the San Domenico Trust. These entries document ownership structure; actual market impact depends on future holder actions.

Because the activity is administrative and pre‑planned, and no issuer cash flows are involved, the disclosure reads as neutral for the equity narrative absent further context.

SEC Form 4

FORM 4

UNITED 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 CA 94403

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Roblox Corp [ RBLX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal Off. & Corp. Sec.

3. Date of Earliest Transaction (Month/Day/Year)
11/05/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	11/05/2025		S(1)		2,401	D	$104.6	387,314(2)	D
Class A Common Stock								120,272(3)	I	See footnote(4)
Class A Common Stock								33,538(3)	I	See footnote(5)
Class A Common Stock								16,653	I	See Footnote(6)
Class A Common Stock								33,538(3)	I	See footnote(7)
Class A Common Stock								16,653	I	See Footnotes(8)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount 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 August 06, 2025.

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. On November 05, 2025, the Reporting Person transferred 1,821 shares of the Issuer's Class A Common Stock from the Susan P. Reinstra 2023 Annuity Trust and 1,821 shares of Class A Common Stock from the Mark L. Reinstra 2023 Annuity Trust to the San Domenico Trust dated August 12, 1999.

4. 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.

5. 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.

6. 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.

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.

8. 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.

Remarks:

	/s/ Mark Reinstra	11/07/2025
	** Signature of Reporting Person	Date
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.

FAQ

What did Roblox (RBLX) disclose in this insider filing?

An officer reported selling 2,401 Class A shares at $104.6 on November 5, 2025 under a Rule 10b5‑1 plan.

How many Roblox shares did the reporting person hold directly after the trade?

Direct beneficial ownership was 387,314 shares following the reported transaction.

When was the Rule 10b5‑1 plan adopted for the RBLX trade?

The plan was adopted on August 6, 2025.

Were there any trust-related share movements disclosed for RBLX?

Yes. On November 5, 2025, 1,821 shares from each of two 2023 annuity trusts were transferred to the San Domenico Trust.

What indirect Roblox holdings are listed in the filing?

Indirect amounts include 120,272 (San Domenico Trust), 33,538 (Mark L. Reinstra 2023 Annuity Trust), 16,653 (Mark L. Reinstra 2022 Annuity Trust), 33,538 (Susan P. Reinstra 2023 Annuity Trust), and 16,653 (Susan P. Reinstra 2022 Annuity Trust).

What is the reporting person’s role at Roblox?

He is the Chief Legal Officer & Corporate Secretary.