Comparable stake leader
VANGUARD GROUP INC
SEC ownership of Roblox Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001315098.
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
28 May 2026
- Public ticker
- RBLX on NYSE
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- VANGUARD GROUP INC
- Latest 13D/G holder
- VANGUARD GROUP INC
- Latest parsed ownership date
- 28 May 2026
- Issuer CIK
- 0001315098
- Issuer location
- San Mateo, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Roblox Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
28 May 2026
13D/G
13F
3/4/5
Lead comparable stake: 9.3%
13D/G row: VANGUARD GROUP INC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 9.3%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 5
VANGUARD GROUP INC
9.3%
FMR LLC
7.9%
David Baszucki
7%
BlackRock, Inc.
5.5%
Altos Ventures IV, L.P.
3.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
9.3%
|
$3,837,692,306
57,640,317 shares
|
$0 | 31 Mar 2025 |
| FMR LLC |
13D/G
13F
Company
|
7.9%
|
$5,227,376,792
49,459,521 shares
|
+$1,039,080,032 | 30 Jun 2025 |
| David Baszucki |
13D/G
3/4/5
President & CEO, Director, 10%+ Owner
|
7%
|
$5,110,111,289
48,349,998 shares
|
$0 | 30 Jun 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
5.5%
|
$4,916,697,447
35,494,495 shares
|
$0 | 30 Sep 2025 |
| Altos Ventures IV, L.P. |
13D/G
3/4/5
Anthony P. Lee · 10%+ Owner
|
3.7%
|
$1,492,469,997
22,416,191 shares
|
$0 | 31 Dec 2024 |
| Christopher Carvalho |
3/4/5
Director
|
0.18%
|
$65,217,412
1,153,066 shares
|
-$6,497,739 | 28 May 2026 |
| Anthony P. Lee |
3/4/5
Director
|
0.14%
|
$49,520,315
875,536 shares
|
-$65,322,182 | 28 May 2026 |
| Arvind Chakravarthy |
3/4/5
Chief People & Systems Officer
|
0.03%
|
$18,932,433
219,157 shares
mixed-class rows
|
-$12,369,768 | 20 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$510,812,398.
Buys
$0
Insiders: 0
Sells
$510,812,398
Insiders: 13
Net
-$510,812,398
Shares: -5,394,059
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 5,394,059
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 200,137 | $0 | $9,707,397 | -$9,707,397 |
| 3-6 | 0 | 789,864 | $0 | $57,149,171 | -$57,149,171 |
| 6-9 | 0 | 382,508 | $0 | $40,839,570 | -$40,839,570 |
| 9-12 | 0 | 4,021,550 | $0 | $403,116,260 | -$403,116,260 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 29 reporting-owner rows connected to Roblox Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
29
Largest Forms 3/4/5 holder
David Baszucki
Net 12M change
-$510,812,400
Latest report
01 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| David Baszucki | President & CEO, Director, 10%+ Owner | $1,929,036,808 | -$365,246,620 | -16% | Mixed | 20 May 2026 |
| Index Ventures Growth III (Jersey), L.P. | 10%+ Owner | $1,898,930,825 | Mixed | 10 Mar 2021 | ||
| Altos Ventures IV Reserve Fund, L.P. | 10%+ Owner | $667,582,842 | Mixed | 19 Nov 2021 | ||
| Gregory Baszucki | Director | $423,186,767 | -$3,642,037 | -0.85% | Mixed | 01 Jun 2026 |
| Hodong Nam | 10%+ Owner | $154,809,718 | Mixed | 24 Apr 2024 | ||
| Altos Ventures IV Liquidity Fund, L.P. | 10%+ Owner | $126,754,629 | Mixed | 17 Jul 2023 | ||
| Han Kim | 10%+ Owner | $126,729,976 | Mixed | 27 Nov 2023 | ||
| Christopher Carvalho | Director | $65,217,412 | -$6,497,739 | -9.1% | Median | 28 May 2026 |
| Manuel Bronstein | Chief Product Officer | $64,527,418 | -$3,023,436 | -4.5% | Mixed | 20 Aug 2025 |
| Michael J. Guthrie | Chief Financial Officer | $56,889,225 | -$4,577,260 | -7.4% | Mixed | 05 Jun 2025 |
| Anthony P. Lee | Director | $49,520,315 | -$65,322,182 | -57% | Median | 28 May 2026 |
| Craig Donato | Chief Business Officer | $48,889,695 | Mixed | 24 May 2023 | ||
| Altos Hybrid 2, L.P. | 10%+ Owner | $28,383,730 | Mixed | 24 Nov 2021 | ||
| Mark Reinstra | Chief Legal Off. & Corp. Sec. | $28,246,638 | -$28,179,180 | -50% | Mixed | 20 May 2026 |
| Altos Ventures IV, L.P. | 10%+ Owner | $20,862,868 | Mixed | 09 Feb 2024 | ||
| Arvind Chakravarthy | Chief People & Systems Officer | $18,932,433 | -$12,369,768 | -40% | Mixed | 20 Feb 2026 |
| Daniel Sturman | Chief Technology Officer | $18,926,612 | Mixed | 20 May 2024 | ||
| Naveen K. Chopra | Chief Financial Officer | $17,280,321 | -$3,396,739 | -16% | Filing P/S | 20 May 2026 |
| Matthew D. Kaufman | Chief Safety Officer | $16,060,582 | -$15,940,923 | -50% | Filing P/S | 20 May 2026 |
| Barbara Messing | CMKtg & Communications Officer | $9,037,018 | Mixed | 21 Nov 2023 |
Recent insider transactions for Roblox Corp
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gregory Baszucki | RBLX | Class A Common Stock | Sale | -1.28% | $777,139 | $46.63 | -16,666 | 1,286,168 | 01 Jun 2026 | See Footnotes |
| Anthony P. Lee | RBLX | Class A Common Stock | Award | 5,185 | 5,185 | 28 May 2026 | Direct | |||
| Gina Mastantuono | RBLX | Class A Common Stock | Award | 36.1% | 5,185 | 19,557 | 28 May 2026 | Direct | ||
| Gregory Baszucki | RBLX | Class A Common Stock | Award | 5,185 | 5,185 | 28 May 2026 | Direct | |||
| Jason Kilar | RBLX | Class A Common Stock | Award | 34.5% | 5,185 | 20,223 | 28 May 2026 | Direct | ||
| Christopher Carvalho | RBLX | Class A Common Stock | Award | 0.47% | 5,185 | 1,112,098 | 28 May 2026 | Direct | ||
| Andrea L. Wong | RBLX | Class A Common Stock | Award | 460.9% | 5,185 | 6,310 | 28 May 2026 | Direct | ||
| Dennis M. Durkin | RBLX | Class A Common Stock | Award | 147.1% | 5,185 | 8,709 | 28 May 2026 | Direct | ||
| Gina Mastantuono | RBLX | Class A Common Stock | Other | -7.27% | -1,126 | 14,372 | 27 May 2026 | Direct | ||
| Gina Mastantuono | RBLX | Phantom Stock | Other | 33.4% | 1,126 | 4,501 | 27 May 2026 | Direct | ||
| Gregory Baszucki | RBLX | Class A Common Stock | Other | -100% | -1,126 | 0 | 27 May 2026 | Direct | ||
| Gregory Baszucki | RBLX | Phantom Stock | Other | 33.4% | 1,126 | 4,501 | 27 May 2026 | Direct | ||
| Jason Kilar | RBLX | Class A Common Stock | Other | -6.97% | -1,126 | 15,038 | 27 May 2026 | Direct | ||
| Jason Kilar | RBLX | Phantom Stock | Other | 33.4% | 1,126 | 4,501 | 27 May 2026 | Direct | ||
| Amy M. Rawlings | RBLX | Class A Common Stock | Sale | -0.78% | $13,152 | $48.00 | -274 | 34,964 | 26 May 2026 | Direct |
| Sean Jack Buckley | RBLX | Class A Common Stock | Sale | -4.66% | $219,932 | $46.36 | -4,744 | 97,141 | 22 May 2026 | Direct |
| Mark Reinstra | RBLX | Class A Common Stock | Sale | -1.25% | $253,357 | $46.40 | -5,460 | 432,738 | 21 May 2026 | Direct |
| Mark Reinstra | RBLX | Class A Common Stock | Sale | -3.79% | $782,170 | $45.28 | -17,275 | 438,198 | 20 May 2026 | Direct |
| Sean Jack Buckley | RBLX | Class A Common Stock | Sale | -5.27% | $256,501 | $45.27 | -5,666 | 101,885 | 20 May 2026 | Direct |
| Naveen K. Chopra | RBLX | Class A Common Stock | Sale | -4.24% | $763,602 | $45.28 | -16,863 | 380,758 | 20 May 2026 | Direct |
| Amy M. Rawlings | RBLX | Class A Common Stock | Sale | -7.59% | $130,969 | $45.24 | -2,895 | 35,238 | 20 May 2026 | Direct |
| Matthew D. Kaufman | RBLX | Class A Common Stock | Sale | -3.94% | $649,956 | $45.27 | -14,356 | 349,964 | 20 May 2026 | Direct |
| David Baszucki | RBLX | Class A Common Stock | Sale | -5.61% | $2,292,446 | $45.28 | -50,628 | 852,214 | 20 May 2026 | Direct |
| Gregory Baszucki | RBLX | Class A Common Stock | Sale | -1.27% | $749,424 | $44.97 | -16,666 | 1,294,501 | 05 May 2026 | See Footnotes |
| Amy M. Rawlings | RBLX | Class A Common Stock | Award | 15.9% | 5,228 | 38,133 | 17 Apr 2026 | Direct | ||
| Matthew D. Kaufman | RBLX | Class A Common Stock | Sale | -3.53% | $772,102 | $57.94 | -13,325 | 364,320 | 13 Apr 2026 | Direct |
| Mark Reinstra | RBLX | Class A Common Stock | Sale | -3.93% | $1,080,808 | $57.94 | -18,653 | 455,473 | 13 Apr 2026 | Direct |
| David Baszucki | RBLX | Class A Common Stock | Conversion of derivative security | 333.3% | 2,687,511 | 3,493,765 | 02 Apr 2026 | See Footnote | ||
| David Baszucki | RBLX | Class B Common Stock | Conversion of derivative security | -12.3% | -2,687,511 | 19,194,993 | 02 Apr 2026 | See Footnote | ||
| Gregory Baszucki | RBLX | Class A Common Stock | Sale | -1.26% | $965,840 | $57.95 | -16,666 | 1,302,834 | 01 Apr 2026 | See Footnotes |
| Dennis M. Durkin | RBLX | Restricted Stock Unit | Award | 3,524 | 3,524 | 19 Mar 2026 | Direct | |||
| David Baszucki | RBLX | Class A Common Stock | Award | 12.8% | 102,303 | 902,842 | 01 Mar 2026 | Direct | ||
| David Baszucki | RBLX | Performance Stock Unit | Award | 613,822 | 613,822 | 01 Mar 2026 | Direct | |||
| Mark Reinstra | RBLX | Class A Common Stock | Award | 25.6% | 96,790 | 474,126 | 01 Mar 2026 | Direct | ||
| Mark Reinstra | RBLX | Performance Stock Unit | Award | 104,236 | 104,236 | 01 Mar 2026 | Direct | |||
| Matthew D. Kaufman | RBLX | Class A Common Stock | Award | 29.3% | 85,609 | 377,645 | 01 Mar 2026 | Direct | ||
| Matthew D. Kaufman | RBLX | Performance Stock Unit | Award | 92,194 | 92,194 | 01 Mar 2026 | Direct | |||
| Naveen K. Chopra | RBLX | Class A Common Stock | Award | 22.6% | 73,299 | 397,621 | 01 Mar 2026 | Direct | ||
| Naveen K. Chopra | RBLX | Performance Stock Unit | Award | 135,320 | 135,320 | 01 Mar 2026 | Direct | |||
| Gregory Baszucki | RBLX | Class A Common Stock | Sale | -1.26% | $1,149,634 | $68.98 | -16,666 | 1,311,167 | 27 Feb 2026 | See Footnotes |
| Andrea L. Wong | RBLX | Class A Common Stock | Sale | -1.24% | $37,249 | $66.16 | -563 | 44,702 | 24 Feb 2026 | See footnote |
| David Baszucki | RBLX | Class A Common Stock | Sale | -1.34% | $667,706 | $61.63 | -10,834 | 800,539 | 20 Feb 2026 | Direct |
| Arvind Chakravarthy | RBLX | Class A Common Stock | Sale | -10.8% | $1,319,234 | $61.61 | -21,413 | 177,589 | 20 Feb 2026 | Direct |
| Naveen K. Chopra | RBLX | Class A Common Stock | Sale | -3.77% | $783,349 | $61.61 | -12,714 | 324,322 | 20 Feb 2026 | Direct |
| Matthew D. Kaufman | RBLX | Class A Common Stock | Sale | -4.96% | $937,887 | $61.59 | -15,227 | 292,036 | 20 Feb 2026 | Direct |
| Amy M. Rawlings | RBLX | Class A Common Stock | Sale | -8.28% | $181,683 | $61.57 | -2,951 | 32,705 | 20 Feb 2026 | Direct |
| Mark Reinstra | RBLX | Class A Common Stock | Sale | -4.36% | $1,058,762 | $61.61 | -17,186 | 377,136 | 20 Feb 2026 | Direct |
| Jason Kilar | RBLX | Class A Common Stock | Other | -6.51% | -1,125 | 16,164 | 20 Feb 2026 | Direct | ||
| Jason Kilar | RBLX | Phantom Stock | Other | 50% | 1,125 | 3,375 | 20 Feb 2026 | Direct | ||
| Gina Mastantuono | RBLX | Class A Common Stock | Other | -6.77% | -1,125 | 15,498 | 20 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.