Mark Reinstra

CIK: 0001835037

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)56 (73.7%)

Position reduction

Option Exercises (M)12 (15.8%)

Derivative conversions

Awards (A)4 (5.3%)

Compensation grants

Other (G, F, J, C, D, …)4 (5.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

RBLX

Roblox Corp

Officer

Discretionary Trading P&L

Holdings

Transaction History (76 total)

RBLX
Roblox Corp
Oct 5, 2026
Sale(S)
Direct
3K shares at avg. $43.88$132K
RBLX
Roblox Corp
Oct 5, 2026
Sale(S)
Direct
2.7K shares at avg. $44.56$119K
RBLX
Roblox Corp
Sep 8, 2026
Sale(S)
Direct
3.8K shares at avg. $45.03$169K
RBLX
Roblox Corp
Sep 8, 2026
Sale(S)
Direct
100 shares at avg. $45.73$5K
RBLX
Roblox Corp
Sep 8, 2026
Sale(S)
Direct
1.9K shares at avg. $44.30$85K
RBLX
Roblox Corp
Aug 20, 2026
Sale(S)
Direct
13K shares at avg. $37.78$492K
RBLX
Roblox Corp
Aug 20, 2026
Sale(S)
Direct
4.9K shares at avg. $38.45$189K
RBLX
Roblox Corp
Aug 19, 2026
Sale(S)
Direct
6.3K shares at avg. $40.00$250K
RBLX
Roblox Corp
Jul 6, 2026
Sale(S)
Direct
3.2K shares at avg. $57.24$184K
RBLX
Roblox Corp
Jul 6, 2026
Sale(S)
Direct
1.1K shares at avg. $57.94$64K
RBLX
Roblox Corp
Jul 6, 2026
Sale(S)
Direct
200 shares at avg. $55.77$11K
RBLX
Roblox Corp
Jun 8, 2026
Sale(S)
Direct
6K shares at avg. $41.71$249K
RBLX
Roblox Corp
May 21, 2026
Sale(S)
Direct
561 shares at avg. $45.93$26K
RBLX
Roblox Corp
May 21, 2026
Sale(S)
Direct
4.9K shares at avg. $46.46$228K
RBLX
Roblox Corp
May 20, 2026
Sale(S)
Direct
1.9K shares at avg. $44.48$85K
RBLX
Roblox Corp
May 20, 2026
Sale(S)
Direct
15.4K shares at avg. $45.38$698K
RBLX
Roblox Corp
Apr 13, 2026
Sale(S)
Direct
100 shares at avg. $58.47$6K
RBLX
Roblox Corp
Apr 13, 2026
Sale(S)
Direct
18.6K shares at avg. $57.94$1.1M
RBLX
Roblox Corp
Mar 1, 2026
Award(A)
Direct
96.8K shares-
RBLX
Roblox Corp
Feb 20, 2026
Sale(S)
Direct
10.2K shares at avg. $61.89$631K
RBLX
Roblox Corp
Feb 20, 2026
Sale(S)
Direct
5.9K shares at avg. $60.92$360K
RBLX
Roblox Corp
Feb 20, 2026
Sale(S)
Direct
1.1K shares at avg. $62.69$67K
RBLX
Roblox Corp
Feb 13, 2026
Sale(S)
Direct
60K shares at avg. $63.94$3.8M
RBLX
Roblox Corp
Feb 10, 2026
Sale(S)
Direct
2.6K shares at avg. $73.14$191K
RBLX
Roblox Corp
Feb 10, 2026
Sale(S)
Direct
31.7K shares at avg. $72.61$2.3M

		Type	Shares	Price		Ownership
Oct 5, 2026	RBLX Roblox Corp	Sale(S)	3,000	$43.88	$131,632	Direct
Oct 5, 2026	RBLX Roblox Corp	Sale(S)	2,666	$44.56	$118,790	Direct
Sep 8, 2026	RBLX Roblox Corp	Sale(S)	3,753	$45.03	$169,000	Direct
Sep 8, 2026	RBLX Roblox Corp	Sale(S)	100	$45.73	$4,573	Direct
Sep 8, 2026	RBLX Roblox Corp	Sale(S)	1,920	$44.30	$85,048	Direct
Aug 20, 2026	RBLX Roblox Corp	Sale(S)	13,020	$37.78	$491,840	Direct
Aug 20, 2026	RBLX Roblox Corp	Sale(S)	4,914	$38.45	$188,947	Direct
Aug 19, 2026	RBLX Roblox Corp	Sale(S)	6,250	$40.00	$250,000	Direct
Jul 6, 2026	RBLX Roblox Corp	Sale(S)	3,212	$57.24	$183,843	Direct
Jul 6, 2026	RBLX Roblox Corp	Sale(S)	1,100	$57.94	$63,737	Direct
Jul 6, 2026	RBLX Roblox Corp	Sale(S)	200	$55.77	$11,154	Direct
Jun 8, 2026	RBLX Roblox Corp	Sale(S)	5,978	$41.71	$249,342	Direct
May 21, 2026	RBLX Roblox Corp	Sale(S)	561	$45.93	$25,767	Direct
May 21, 2026	RBLX Roblox Corp	Sale(S)	4,899	$46.46	$227,590	Direct
May 20, 2026	RBLX Roblox Corp	Sale(S)	1,903	$44.48	$84,637	Direct
May 20, 2026	RBLX Roblox Corp	Sale(S)	15,372	$45.38	$697,532	Direct
Apr 13, 2026	RBLX Roblox Corp	Sale(S)	100	$58.47	$5,847	Direct
Apr 13, 2026	RBLX Roblox Corp	Sale(S)	18,553	$57.94	$1,074,961	Direct
Mar 1, 2026	RBLX Roblox Corp	Award(A)	96,790	-	$0	Direct
Feb 20, 2026	RBLX Roblox Corp	Sale(S)	10,203	$61.89	$631,464	Direct
Feb 20, 2026	RBLX Roblox Corp	Sale(S)	5,913	$60.92	$360,220	Direct
Feb 20, 2026	RBLX Roblox Corp	Sale(S)	1,070	$62.69	$67,078	Direct
Feb 13, 2026	RBLX Roblox Corp	Sale(S)	60,000	$63.94	$3,836,484	Direct
Feb 10, 2026	RBLX Roblox Corp	Sale(S)	2,615	$73.14	$191,254	Direct
Feb 10, 2026	RBLX Roblox Corp	Sale(S)	31,705	$72.61	$2,302,221	Direct

1-25 of 76 transactions

About Reinstra Mark

Reinstra Mark (SEC CIK 0001835037) files insider reports with the SEC as Chief Legal Off. & Corp. Sec. of Roblox Corp (RBLX).

Signal8 holds 33 ownership filings by Reinstra Mark, all Form 4s, filed between Sep 24, 2024 and Oct 6, 2026. Those filings report 76 transactions, from Sep 23, 2024 to Oct 5, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Reinstra Mark's filings is in SAN MATEO, CA.

Recent filings by Reinstra Mark

Oct 5, 2026: Open-market sales of RBLX shares (2 lines, Form 4, code S).
Sep 8, 2026: Open-market sales of RBLX shares (3 lines, Form 4, code S).
Aug 20, 2026: Open-market sales of RBLX shares (2 lines, Form 4, code S).
Aug 19, 2026: Open-market sale of RBLX shares (Form 4, code S).
Jul 6, 2026: Open-market sales of RBLX shares (3 lines, Form 4, code S).

Other insiders filing for Roblox Corp (RBLX)

Rawlings Amy Marie, Chief Accounting Officer
Baszucki Gregory, Director
Wong Andrea L, Director
BUCKLEY SEAN JACK, Chief People & Systems Officer
Kaufman Matthew D, Chief Safety Officer
CHOPRA NAVEEN K., Chief Financial Officer

How to read Form 4 transaction codes