Matthew D Kaufman
Insider
First SEC filing: March 26, 2025 · Latest: March 26, 2025
Insider at
Insider transactions
0 buys (P)
20 sells (S)
Net: $-8,399,845
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 20, 2026 | RBLX | S | 10,994 | $37.78 | $415,353 | 338,970 Direct | -3.14% | Disposed | 20.6% (price as of 2026-10-06) |
| Aug. 20, 2026 | RBLX | S | 3,910 | $38.47 | $150,418 | 335,060 Direct | -1.15% | Disposed | 18.4% (price as of 2026-10-06) |
| May 20, 2026 | RBLX | S | 1,410 | $44.42 | $62,632 | 362,910 Direct | -0.39% | Disposed | 2.6% (price as of 2026-10-06) |
| May 20, 2026 | RBLX | S | 12,756 | $45.36 | $578,612 | 350,154 Direct | -3.51% | Disposed | 0.4% (price as of 2026-10-06) |
| May 20, 2026 | RBLX | S | 190 | $45.89 | $8,719 | 349,964 Direct | -0.05% | Disposed | -0.7% (price as of 2026-10-06) |
| April 13, 2026 | RBLX | S | 13,225 | $57.94 | $766,256 | 364,420 Direct | -3.50% | Disposed | -21.4% (price as of 2026-10-06) |
| April 13, 2026 | RBLX | S | 100 | $58.45 | $5,845 | 364,320 Direct | -0.03% | Disposed | -22.1% (price as of 2026-10-06) |
| March 1, 2026 | RBLX | A | 85,609 | · | · | 377,645 Direct | +29.31% | Acquired | (price as of 2026-10-06) |
| March 1, 2026 | RBLX | A | 92,194 | · | · | 92,194 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 20, 2026 | RBLX | S | 5,588 | $60.94 | $340,533 | 301,675 Direct | -1.82% | Disposed | -25.2% (price as of 2026-10-06) |
| Feb. 20, 2026 | RBLX | S | 8,589 | $61.88 | $531,487 | 293,086 Direct | -2.85% | Disposed | -26.4% (price as of 2026-10-06) |
| Feb. 20, 2026 | RBLX | S | 1,050 | $62.73 | $65,866 | 292,036 Direct | -0.36% | Disposed | -27.4% (price as of 2026-10-06) |
| Feb. 10, 2026 | RBLX | S | 27,634 | $72.61 | $2,006,505 | 309,663 Direct | -8.19% | Disposed | -37.3% (price as of 2026-10-06) |
| Feb. 10, 2026 | RBLX | S | 2,400 | $73.15 | $175,560 | 307,263 Direct | -0.78% | Disposed | -37.7% (price as of 2026-10-06) |
| Feb. 9, 2026 | RBLX | M | 97,522 | · | · | 337,297 Direct | +40.67% | Acquired | (price as of 2026-10-06) |
| Feb. 9, 2026 | RBLX | M | 97,522 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S 10b5-1 | 6,000 | $98.21 | $589,260 | 254,642 Direct | -2.30% | Disposed | -53.6% (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S | 3,200 | $93.49 | $299,168 | 251,442 Direct | -1.26% | Disposed | -51.3% (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S | 2,526 | $94.57 | $238,884 | 248,916 Direct | -1.00% | Disposed | -51.8% (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S | 4,886 | $95.52 | $466,711 | 244,030 Direct | -1.96% | Disposed | -52.3% (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S | 3,595 | $96.55 | $347,097 | 240,435 Direct | -1.47% | Disposed | -52.8% (price as of 2026-10-06) |
| Nov. 20, 2025 | RBLX | S | 660 | $97.15 | $64,119 | 239,775 Direct | -0.27% | Disposed | -53.1% (price as of 2026-10-06) |
| Nov. 6, 2025 | RBLX | S 10b5-1 | 6,000 | $101.48 | $608,880 | 260,642 Direct | -2.25% | Disposed | -55.1% (price as of 2026-10-06) |
| Nov. 3, 2025 | RBLX | S 10b5-1 | 6,000 | $112.99 | $677,940 | 266,642 Direct | -2.20% | Disposed | -59.7% (price as of 2026-10-06) |
| Oct. 2, 2025 | RBLX | S 10b5-1 | 6,000 | $135.02 | $810,120 | 272,642 Direct | -2.15% | Disposed | -66.3% (price as of 2026-10-06) |
| Sept. 18, 2025 | RBLX | S 10b5-1 | 6,000 | $136.55 | $819,300 | 278,642 Direct | -2.11% | Disposed | -66.6% (price as of 2026-10-06) |
| Sept. 10, 2025 | RBLX | A | 9,627 | · | · | 284,642 Direct | +3.50% | Acquired | (price as of 2026-10-06) |
| Sept. 4, 2025 | RBLX | S 10b5-1 | 6,000 | $134.20 | $805,200 | 275,015 Direct | -2.14% | Disposed | -66.1% (price as of 2026-10-06) |
| Aug. 21, 2025 | RBLX | S 10b5-1 | 6,000 | $116.84 | $701,040 | 281,015 Direct | -2.09% | Disposed | -61.0% (price as of 2026-10-06) |
| Aug. 20, 2025 | RBLX | S | 1,230 | $116.05 | $142,742 | 299,993 Direct | -0.41% | Disposed | -60.7% (price as of 2026-10-06) |
| Aug. 20, 2025 | RBLX | S | 3,945 | $117.02 | $461,644 | 296,048 Direct | -1.32% | Disposed | -61.1% (price as of 2026-10-06) |
| Aug. 20, 2025 | RBLX | S | 5,621 | $117.97 | $663,109 | 290,427 Direct | -1.90% | Disposed | -61.4% (price as of 2026-10-06) |
| Aug. 20, 2025 | RBLX | S | 3,412 | $118.67 | $404,902 | 287,015 Direct | -1.17% | Disposed | -61.6% (price as of 2026-10-06) |
| Aug. 7, 2025 | RBLX | S 10b5-1 | 6,000 | $133.67 | $802,020 | 301,223 Direct | -1.95% | Disposed | -65.9% (price as of 2026-10-06) |
| July 17, 2025 | RBLX | S 10b5-1 | 6,000 | $118.51 | $711,060 | 307,223 Direct | -1.92% | Disposed | -61.6% (price as of 2026-10-06) |
| July 3, 2025 | RBLX | S 10b5-1 | 6,000 | $102.58 | $615,480 | 313,223 Direct | -1.88% | Disposed | -55.6% (price as of 2026-10-06) |
| June 20, 2025 | RBLX | S 10b5-1 | 6,000 | $103.35 | $620,100 | 319,223 Direct | -1.84% | Disposed | -55.9% (price as of 2026-10-06) |
| June 5, 2025 | RBLX | S 10b5-1 | 6,000 | $91.69 | $550,140 | 325,223 Direct | -1.81% | Disposed | -50.3% (price as of 2026-10-06) |
| May 20, 2025 | RBLX | S | 13,928 | $80.61 | $1,122,736 | 332,316 Direct | -4.02% | Disposed | -43.5% (price as of 2026-10-06) |
| May 20, 2025 | RBLX | S | 1,093 | $81.23 | $88,784 | 331,223 Direct | -0.33% | Disposed | -43.9% (price as of 2026-10-06) |
| May 15, 2025 | RBLX | S 10b5-1 | 6,000 | $79.94 | $479,640 | 346,244 Direct | -1.70% | Disposed | -43.0% (price as of 2026-10-06) |
| May 5, 2025 | RBLX | S 10b5-1 | 11,425 | $71.80 | $820,315 | 352,819 Direct | -3.14% | Disposed | -36.5% (price as of 2026-10-06) |
| May 5, 2025 | RBLX | S 10b5-1 | 575 | $72.46 | $41,664 | 352,244 Direct | -0.16% | Disposed | -37.1% (price as of 2026-10-06) |
| April 3, 2025 | RBLX | S 10b5-1 | 6,000 | $57.99 | $347,940 | 364,244 Direct | -1.62% | Disposed | -21.4% (price as of 2026-10-06) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 1, 2026 | RBLX | Performance Stock Unit | Class A Common Stock | · | · | 92,194 | Acquired |
| Feb. 9, 2026 | RBLX | Performance Stock Unit | Class A Common Stock | · | · | 97,522 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 26, 2025 | RBLX | Class A Common Stock | 370,244 | Direct |
| March 26, 2025 | RBLX | Stock Option (Right to Buy) | 41,334 | Direct |
| March 26, 2025 | RBLX | Performance Stock Unit | · | Direct |
| March 26, 2025 | RBLX | Performance Stock Unit | · | Direct |
| March 26, 2025 | RBLX | Performance Stock Unit | · | Direct |