Mark Reinstra is Secretary at Roblox Corp (RBLX). They have made 33 open-market trades across 1 company since 2021, most recently 2026-10-05.
CIK 0001835037
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 33 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| RBLX | 386,625 | $19.1M |
Shares reported on the most recent Form 4, priced at the 2026-10-06 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| RBLX | SELL · 10b5-1 | 2026-10-05 | 2026-10-06 | $44.20 | $250K | +12.5% | — | — |
| RBLX | SELL · 10b5-1 | 2026-09-08 | 2026-09-09 | $44.80 | $259K | +14.1% | +7.0% | — |
| RBLX | SELL | 2026-08-20 | 2026-08-24 | $37.96 | $681K | +7.0% | +26.4% | — |
| RBLX | SELL · 10b5-1 | 2026-08-19 | 2026-08-20 | $40.00 | $250K | +5.3% | +32.7% | — |
| RBLX | SELL · 10b5-1 | 2026-07-06 | 2026-07-07 | $57.34 | $259K | -7.3% | -35.4% | -20.1% |
| RBLX | SELL · 10b5-1 | 2026-06-08 | 2026-06-08 | $41.71 | $249K | +23.0% | +31.7% | +7.0% |
| RBLX | SELL · 10b5-1 | 2026-05-20 | 2026-05-22 | $45.55 | $1.0M | -9.9% | -1.6% | -19.6% |
| RBLX | SELL | 2026-04-13 | 2026-04-15 | $57.94 | $1.1M | -6.3% | -30.2% | -11.2% |
| RBLX | SELL | 2026-02-20 | 2026-02-24 | $61.61 | $1.1M | -5.2% | -19.6% | -31.3% |
| RBLX | SELL | 2026-02-13 | 2026-02-19 | $63.94 | $3.8M | +5.3% | -10.7% | -28.0% |
| RBLX | SELL | 2026-02-10 | 2026-02-11 | $72.65 | $2.5M | -1.8% | -17.4% | -39.2% |
| RBLX | SELL | 2025-11-20 | 2025-11-24 | $95.24 | $3.2M | +7.3% | -8.8% | -30.4% |
| RBLX | SELL · 10b5-1 | 2025-11-05 | 2025-11-07 | $104.60 | $502K | -9.9% | -9.6% | -43.9% |
| RBLX | SELL | 2025-08-20 | 2025-08-22 | $117.71 | $3.7M | +5.3% | +11.1% | -25.6% |
| RBLX | SELL · 10b5-1 | 2025-06-16 | 2025-06-18 | $99.75 | $15.0M | -2.5% | +20.6% | +31.6% |
| RBLX | SELL · 10b5-1 | 2025-05-27 | 2025-05-29 | $84.64 | $4.2M | +9.2% | +22.6% | +43.0% |
| RBLX | SELL | 2025-05-20 | 2025-05-22 | $80.66 | $2.6M | +13.1% | +28.6% | +47.2% |
| RBLX | SELL | 2025-02-20 | 2025-02-24 | $61.39 | $2.0M | -3.2% | -0.2% | +41.2% |
| RBLX | SELL | 2025-02-11 | 2025-02-12 | $65.94 | $2.6M | -6.9% | -11.5% | +20.7% |
| RBLX | SELL · 10b5-1 | 2025-01-22 | 2025-01-24 | $65.89 | $1.6M | +17.3% | -5.1% | +2.1% |
| RBLX | SELL · 10b5-1 | 2025-01-16 | 2025-01-21 | $64.98 | $3.2M | +6.8% | -5.6% | -9.9% |
| RBLX | SELL · 10b5-1 | 2024-12-23 | 2024-12-26 | $59.75 | $1.4M | +3.5% | +12.0% | +0.7% |
| RBLX | SELL · 10b5-1 | 2024-12-11 | 2024-12-13 | $60.00 | $300K | +1.8% | +4.2% | -5.3% |
| RBLX | SELL · 10b5-1 | 2024-11-25 | 2024-11-26 | $48.75 | $439K | +16.0% | +22.1% | +24.4% |
| RBLX | SELL | 2024-11-20 | 2024-11-22 | $51.43 | $1.7M | +20.0% | +20.6% | +27.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.