Matthew D. Kaufman is Chief Safety Officer at Roblox Corp (RBLX). They have made 6 open-market trades across 1 company since 2025, most recently 2026-08-20.
CIK 0002044191
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 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| RBLX | 335,060 | $16.6M |
Shares reported on the most recent Form 4, priced at the 2026-08-24 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 | 2026-08-20 | 2026-08-24 | $37.96 | $566K | +7.0% | +26.4% | — |
| RBLX | SELL | 2026-05-20 | 2026-05-22 | $45.27 | $650K | -9.9% | -1.6% | -19.6% |
| RBLX | SELL | 2026-04-13 | 2026-04-15 | $57.94 | $772K | -6.3% | -30.2% | -11.2% |
| RBLX | SELL | 2026-02-20 | 2026-02-24 | $61.59 | $938K | -5.2% | -19.6% | -31.3% |
| RBLX | SELL | 2026-02-10 | 2026-02-11 | $72.65 | $2.2M | -1.8% | -17.4% | -39.2% |
| RBLX | SELL · 10b5-1 | 2025-11-20 | 2025-11-24 | $95.96 | $3.1M | +7.3% | -8.8% | -30.4% |
| RBLX | SELL · 10b5-1 | 2025-11-06 | 2025-11-10 | $101.48 | $609K | -12.6% | -10.0% | -30.0% |
| RBLX | SELL · 10b5-1 | 2025-11-03 | 2025-11-05 | $112.99 | $678K | -0.7% | -5.6% | -35.9% |
| RBLX | SELL · 10b5-1 | 2025-10-02 | 2025-10-06 | $135.02 | $1.6M | +7.1% | -18.6% | -35.5% |
| RBLX | SELL · 10b5-1 | 2025-09-18 | 2025-09-22 | $136.55 | $1.6M | -2.9% | -6.9% | -40.3% |
| RBLX | SELL · 10b5-1 | 2025-09-04 | 2025-09-08 | $134.20 | $1.6M | +4.3% | -3.0% | -24.8% |
| RBLX | SELL · 10b5-1 | 2025-08-20 | 2025-08-22 | $117.56 | $4.0M | +5.3% | +11.1% | -25.6% |
| RBLX | SELL · 10b5-1 | 2025-08-07 | 2025-08-08 | $133.67 | $1.6M | -7.8% | -0.0% | -21.2% |
| RBLX | SELL · 10b5-1 | 2025-07-17 | 2025-07-21 | $118.51 | $711K | +11.6% | -4.1% | +9.2% |
| RBLX | SELL · 10b5-1 | 2025-07-03 | 2025-07-08 | $102.58 | $615K | +18.0% | +22.9% | +19.7% |
| RBLX | SELL · 10b5-1 | 2025-06-20 | 2025-06-24 | $103.35 | $620K | +2.6% | +12.5% | +30.3% |
| RBLX | SELL · 10b5-1 | 2025-06-05 | 2025-06-09 | $91.69 | $550K | +9.8% | +14.7% | +38.2% |
| RBLX | SELL | 2025-05-20 | 2025-05-22 | $80.66 | $2.4M | +13.1% | +28.6% | +47.2% |
| RBLX | SELL · 10b5-1 | 2025-05-15 | 2025-05-19 | $79.94 | $480K | +6.5% | +25.7% | +46.9% |
| RBLX | SELL · 10b5-1 | 2025-05-05 | 2025-05-07 | $71.83 | $862K | +14.6% | +35.2% | +79.4% |
| RBLX | SELL · 10b5-1 | 2025-04-03 | 2025-04-07 | $57.99 | $348K | +9.5% | +29.2% | +97.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.