Roblox (RBLX) legal chief sells 22,735 shares under Rule 10b5-1 plan

Rhea-AI Filing Summary

Roblox Corp’s Chief Legal Officer and Corporate Secretary Mark Reinstra reported open-market sales of a total of 22,735 shares of Class A Common Stock on May 20–21, 2026 at prices around $44–$46 per share. The filing notes that a portion of the shares was sold to cover statutory tax withholding tied to vesting of RSUs and PSUs under a mandatory sell-to-cover arrangement, and all reported transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on February 19, 2026. Following these transactions, he continues to hold 432,738 shares directly, in addition to indirect holdings through several trusts.

Insider Trade Summary 10b5-1

Net Seller: 22,735 shares ($1,035,526)

Net Sell 9 txns

Insider Reinstra Mark

Role Chief Legal Off. & Corp. Sec.

Sold 22,735 shs ($1.04M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	561	$45.9302	$26K
Sale	Class A Common Stock	4,899	$46.4564	$228K
Sale	Class A Common Stock	1,903	$44.4758	$85K
Sale	Class A Common Stock	15,372	$45.3768	$698K
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 437,637 shares (Direct, null); Class A Common Stock — 16,653 shares (Indirect, See Footnote)

Footnotes (1)

1. Represents the number of shares sold to cover statutory tax withholding obligations arising in connection with the vesting of certain Restricted Stock Units ("RSUs") and Performance Stock Units ("PSUs"). These shares were sold pursuant to a mandatory "sell-to-cover" arrangement under the Issuer's equity incentive plan to satisfy tax withholding obligations and do not represent a discretionary transaction by the Reporting Person. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $43.92 to $44.91, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 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. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.92 to $45.89, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 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. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.15 to $46.145, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.15 to $46.92, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 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. 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. 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. 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. 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.

Key Figures

Shares sold: 22,735 shares Sale prices: $44–$46 per share Direct holdings after trades: 432,738 shares +2 more

5 metrics

Shares sold 22,735 shares Total Class A Common Stock sold on May 20–21, 2026

Sale prices $44–$46 per share Approximate range of weighted average sale prices reported

Direct holdings after trades 432,738 shares Direct Class A Common Stock held following latest reported sale

Single trade example 15,372 shares at $45.3768 Open-market sale of Class A Common Stock on May 20, 2026

Single trade example 4,899 shares at $46.4564 Open-market sale of Class A Common Stock on May 21, 2026

Key Terms

Rule 10b5-1 Plan, Restricted Stock Units ("RSUs"), Performance Stock Units ("PSUs"), sell-to-cover arrangement, +1 more

5 terms

Rule 10b5-1 Plan regulatory

"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person"

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

"arising in connection with the vesting of certain 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.

Performance Stock Units ("PSUs") financial

"arising in connection with the vesting of certain Restricted Stock Units ("RSUs") and Performance Stock Units ("PSUs")"

sell-to-cover arrangement financial

"sold pursuant to a mandatory "sell-to-cover" arrangement under the Issuer's equity incentive plan"

statutory tax withholding obligations financial

"sold to cover statutory tax withholding obligations arising in connection with the vesting"

Form 4 Insider Transactions: What Each Field Means →

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 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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/20/2026		S(1)		1,903	D	$44.4758(2)	453,570(3)	D
Class A Common Stock	05/20/2026		S(1)		15,372	D	$45.3768(4)	438,198(3)	D
Class A Common Stock	05/21/2026		S(5)		561	D	$45.9302(6)	437,637(3)	D
Class A Common Stock	05/21/2026		S(5)		4,899	D	$46.4564(7)	432,738(3)	D
Class A Common Stock								16,653	I	See Footnote(8)
Class A Common Stock								120,272	I	See footnote(9)
Class A Common Stock								33,538	I	See footnote(10)
Class A Common Stock								16,653	I	See Footnote(11)
Class A Common Stock								33,538	I	See footnote(12)

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. Represents the number of shares sold to cover statutory tax withholding obligations arising in connection with the vesting of certain Restricted Stock Units ("RSUs") and Performance Stock Units ("PSUs"). These shares were sold pursuant to a mandatory "sell-to-cover" arrangement under the Issuer's equity incentive plan to satisfy tax withholding obligations and do not represent a discretionary transaction by the Reporting Person.

2. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $43.92 to $44.91, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. 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.

4. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.92 to $45.89, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. 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.

6. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.15 to $46.145, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

7. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.15 to $46.92, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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.

9. 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.

10. 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.

11. 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.

12. 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 Reinstra	05/22/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

How many Roblox (RBLX) shares did Mark Reinstra sell in this Form 4?

Mark Reinstra reported selling a total of 22,735 shares of Roblox Class A Common Stock. These sales occurred over May 20–21, 2026 and are classified as open-market transactions in the Form 4 insider trading report.

What prices did Mark Reinstra receive for his Roblox (RBLX) share sales?

The reported sales prices ranged around $44–$46 per share, with weighted average prices of $44.4758, $45.3768, $45.9302, and $46.4564. Footnotes explain that each line reflects multiple trades within specified price ranges.

How many Roblox (RBLX) shares does Mark Reinstra hold after these transactions?

After the reported sales, Mark Reinstra directly holds 432,738 shares of Roblox Class A Common Stock. The Form 4 also lists additional indirect holdings through several trusts for which he serves as trustee, with separate share amounts reported for each trust.

Were Mark Reinstra’s Roblox (RBLX) share sales discretionary or pre-planned?

The Form 4 states the transactions were effected under a Rule 10b5-1 trading plan adopted on February 19, 2026. Such plans are pre-arranged, meaning the timing and conditions of trades are set in advance rather than decided opportunistically.

Did any of the Roblox (RBLX) sales cover tax obligations on RSU or PSU vesting?

Yes. A footnote explains that a portion of the sold shares covered statutory tax withholding from vesting of Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) under a mandatory sell-to-cover arrangement, rather than representing discretionary sales.

What indirect Roblox (RBLX) holdings are reported for Mark Reinstra in this Form 4?

The Form 4 lists indirect holdings in several trusts, including the Susan P. Reinstra 2022 Annuity Trust, San Domenico Trust, and multiple Mark L. Reinstra Annuity Trusts. The filing notes he serves as trustee and may be deemed to have beneficial ownership.