James Fu Bin Lu
Insider
Activist
First SEC filing: Nov. 22, 2022 · Latest: Nov. 26, 2025
Insider at
Insider transactions
0 buys (P)
31 sells (S)
Net: $-101,592,323
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 |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 6, 2026 | GRND | S | 475,000 | $10.01 | $4,754,750 | 18,432,101 Indirect | -2.51% | Disposed | 35.3% (price as of 2026-10-05) |
| Feb. 5, 2026 | GRND | S | 600,000 | $10.07 | $6,042,000 | 18,907,101 Indirect | -3.08% | Disposed | 34.5% (price as of 2026-10-05) |
| Feb. 4, 2026 | GRND | S | 375,000 | $10.13 | $3,798,750 | 19,507,101 Indirect | -1.89% | Disposed | 33.7% (price as of 2026-10-05) |
| Feb. 3, 2026 | GRND | S | 234,339 | $10.73 | $2,514,457 | 19,882,101 Indirect | -1.16% | Disposed | 26.2% (price as of 2026-10-05) |
| Feb. 2, 2026 | GRND | S | 178,427 | $11.14 | $1,987,677 | 20,116,440 Indirect | -0.88% | Disposed | 21.5% (price as of 2026-10-05) |
| Jan. 30, 2026 | GRND | S | 200,000 | $11.27 | $2,254,000 | 20,294,867 Indirect | -0.98% | Disposed | 20.1% (price as of 2026-10-05) |
| Jan. 27, 2026 | GRND | S | 200,000 | $11.74 | $2,348,000 | 20,494,867 Indirect | -0.97% | Disposed | 15.3% (price as of 2026-10-05) |
| Jan. 26, 2026 | GRND | S | 239,000 | $11.97 | $2,860,830 | 20,694,867 Indirect | -1.14% | Disposed | 13.1% (price as of 2026-10-05) |
| Jan. 23, 2026 | GRND | S | 200,000 | $11.90 | $2,380,000 | 20,933,867 Indirect | -0.95% | Disposed | 13.8% (price as of 2026-10-05) |
| Jan. 22, 2026 | GRND | S | 200,000 | $11.98 | $2,396,000 | 21,133,867 Indirect | -0.94% | Disposed | 13.0% (price as of 2026-10-05) |
| Jan. 21, 2026 | GRND | S | 200,000 | $11.99 | $2,398,000 | 21,333,867 Indirect | -0.93% | Disposed | 12.9% (price as of 2026-10-05) |
| Jan. 20, 2026 | GRND | S | 200,000 | $12.06 | $2,412,000 | 21,533,867 Indirect | -0.92% | Disposed | 12.3% (price as of 2026-10-05) |
| Jan. 12, 2026 | GRND | S | 112,368 | $13.23 | $1,486,629 | 4,455 Direct | -96.19% | Disposed | 2.3% (price as of 2026-10-05) |
| Jan. 9, 2026 | GRND | S | 302,939 | $13.22 | $4,004,854 | 116,823 Direct | -72.17% | Disposed | 2.4% (price as of 2026-10-05) |
| Jan. 5, 2026 | GRND | S | 92,071 | $13.53 | $1,245,721 | 419,762 Direct | -17.99% | Disposed | 0.1% (price as of 2026-10-05) |
| Dec. 29, 2025 | GRND | S | 3,628 | $13.50 | $48,978 | 511,833 Direct | -0.70% | Disposed | 0.3% (price as of 2026-10-05) |
| Dec. 26, 2025 | GRND | S | 43,994 | $13.51 | $594,359 | 515,461 Direct | -7.86% | Disposed | 0.2% (price as of 2026-10-05) |
| Dec. 23, 2025 | GRND | S | 100,000 | $13.80 | $1,380,000 | 559,455 Direct | -15.16% | Disposed | -1.9% (price as of 2026-10-05) |
| Nov. 18, 2025 | GRND | S | 75,748 | $13.65 | $1,033,960 | 22,388,867 Indirect | -0.34% | Disposed | -0.8% (price as of 2026-10-05) |
| Nov. 17, 2025 | GRND | S | 4,316 | $14.01 | $60,467 | 22,464,615 Indirect | -0.02% | Disposed | -3.4% (price as of 2026-10-05) |
| Nov. 14, 2025 | GRND | S | 363,665 | $14.10 | $5,127,676 | 22,468,931 Indirect | -1.59% | Disposed | -4.0% (price as of 2026-10-05) |
| Nov. 13, 2025 | GRND | S | 205,579 | $14.45 | $2,970,617 | 22,832,596 Indirect | -0.89% | Disposed | -6.3% (price as of 2026-10-05) |
| Nov. 12, 2025 | GRND | S | 291,948 | $14.80 | $4,320,830 | 23,038,175 Indirect | -1.25% | Disposed | -8.5% (price as of 2026-10-05) |
| Nov. 11, 2025 | GRND | S | 558,744 | $14.99 | $8,375,573 | 23,330,123 Indirect | -2.34% | Disposed | -9.7% (price as of 2026-10-05) |
| Oct. 17, 2025 | GRND | S | 250,000 | $13.13 | $3,282,500 | 23,888,867 Indirect | -1.04% | Disposed | 3.1% (price as of 2026-10-05) |
| Oct. 16, 2025 | GRND | S | 400,000 | $12.66 | $5,064,000 | 24,138,867 Indirect | -1.63% | Disposed | 7.0% (price as of 2026-10-05) |
| Oct. 15, 2025 | GRND | S | 400,000 | $12.96 | $5,184,000 | 24,538,867 Indirect | -1.60% | Disposed | 4.5% (price as of 2026-10-05) |
| Oct. 13, 2025 | GRND | S | 96,191 | $12.25 | $1,178,340 | 25,192,676 Indirect | -0.38% | Disposed | 10.5% (price as of 2026-10-05) |
| Oct. 13, 2025 | GRND | S | 253,809 | $13.22 | $3,355,355 | 24,938,867 Indirect | -1.01% | Disposed | 2.4% (price as of 2026-10-05) |
| Oct. 10, 2025 | GRND | S | 300,000 | $11.94 | $3,582,000 | 25,288,867 Indirect | -1.17% | Disposed | 13.4% (price as of 2026-10-05) |
| Oct. 9, 2025 | GRND | S | 1,000,000 | $13.15 | $13,150,000 | 25,588,867 Indirect | -3.76% | Disposed | 3.0% (price as of 2026-10-05) |
| July 30, 2025 | GRND | A | 7,240 | · | · | 9,885 Direct | +273.72% | Acquired | (price as of 2026-10-05) |
| June 3, 2025 | GRND | A | 456 | · | · | 2,645 Direct | +20.83% | Acquired | (price as of 2026-10-05) |
| May 28, 2025 | GRND | S | 852,567 | $23.93 | $20,401,928 | 26,588,867 Indirect | -3.11% | Disposed | -43.4% (price as of 2026-10-05) |
| May 27, 2025 | GRND | S | 251,898 | $23.86 | $6,010,286 | 27,441,434 Indirect | -0.91% | Disposed | -43.3% (price as of 2026-10-05) |
| May 23, 2025 | GRND | S | 229,627 | $23.99 | $5,508,752 | 27,693,332 Indirect | -0.82% | Disposed | -43.6% (price as of 2026-10-05) |
| May 22, 2025 | GRND | S | 168,009 | $23.98 | $4,028,856 | 27,922,959 Indirect | -0.60% | Disposed | -43.5% (price as of 2026-10-05) |
| May 14, 2025 | GRND | S | 200,811 | $24.05 | $4,829,505 | 28,082,445 Indirect | -0.71% | Disposed | -43.7% (price as of 2026-10-05) |
| May 13, 2025 | GRND | S | 1,073,942 | $24.01 | $25,785,347 | 26,536,256 Indirect | -3.89% | Disposed | -43.6% (price as of 2026-10-05) |
| May 12, 2025 | GRND | S | 480,770 | $23.78 | $11,432,711 | 27,610,198 Indirect | -1.71% | Disposed | -43.1% (price as of 2026-10-05) |
| March 17, 2025 | GRND | X | 334,281 | $10.73 | $3,586,835 | 28,090,968 Indirect | -1.18% | Disposed | 26.2% (price as of 2026-10-05) |
| March 17, 2025 | GRND | X | 327,053 | $2.54 | $830,715 | 0 Indirect | -100.00% | Disposed | 433.1% (price as of 2026-10-05) |
| Feb. 14, 2025 | GRND | X | 1,336,124 | $11.50 | $15,365,426 | 2,611,496 Direct | +104.76% | Acquired | 17.7% (price as of 2026-10-05) |
| Feb. 14, 2025 | GRND | D | 853,784 | $18.26 | $15,590,096 | 1,757,712 Direct | -32.69% | Disposed | -25.8% (price as of 2026-10-05) |
| Feb. 14, 2025 | GRND | X | 1,336,124 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 480,947 | $7.51 | $3,611,912 | 29,790,903 Indirect | -1.59% | Disposed | 80.3% (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 568,539 | $6.69 | $3,803,526 | 29,222,365 Indirect | -1.91% | Disposed | 102.4% (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 318,916 | $6.46 | $2,060,197 | 28,903,448 Indirect | -1.09% | Disposed | 109.6% (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 478,199 | $9.03 | $4,318,137 | 28,425,249 Indirect | -1.65% | Disposed | 49.9% (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 445,209 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 517,456 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 285,609 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 31, 2024 | GRND | X | 443,943 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 10, 2024 | GRND | S | 375,000 | $15.14 | $5,677,500 | 1,275,372 Direct | -22.72% | Disposed | -10.6% (price as of 2026-10-05) |
| Dec. 10, 2024 | GRND | S | 375,000 | $15.14 | $5,677,500 | 1,650,372 Direct | -18.52% | Disposed | -10.6% (price as of 2026-10-05) |
| Dec. 10, 2024 | GRND | S | 375,000 | $15.14 | $5,677,500 | 31,540,655 Indirect | -1.17% | Disposed | -10.6% (price as of 2026-10-05) |
| Dec. 10, 2024 | GRND | S | 375,000 | $15.14 | $5,677,500 | 31,915,655 Indirect | -1.16% | Disposed | -10.6% (price as of 2026-10-05) |
| Dec. 5, 2024 | GRND | S | 386,922 | $15.32 | $5,927,645 | 32,581,478 Indirect | -1.17% | Disposed | -11.6% (price as of 2026-10-05) |
| Dec. 4, 2024 | GRND | S | 692,211 | $15.37 | $10,639,283 | 32,968,400 Indirect | -2.06% | Disposed | -11.9% (price as of 2026-10-05) |
| Dec. 3, 2024 | GRND | S | 633,273 | $15.32 | $9,701,742 | 33,660,611 Indirect | -1.85% | Disposed | -11.6% (price as of 2026-10-05) |
| Dec. 2, 2024 | GRND | S | 683,297 | $15.17 | $10,365,615 | 33,027,338 Indirect | -2.03% | Disposed | -10.7% (price as of 2026-10-05) |
| Nov. 13, 2024 | GRND | S | 195,600 | $14.39 | $2,814,684 | 34,977,181 Indirect | -0.56% | Disposed | -5.9% (price as of 2026-10-05) |
| Nov. 12, 2024 | GRND | S | 215,980 | $14.72 | $3,179,226 | 35,172,781 Indirect | -0.61% | Disposed | -8.0% (price as of 2026-10-05) |
| July 30, 2024 | GRND | A | 7,240 | · | · | 9,885 Direct | +273.72% | Acquired | (price as of 2026-10-05) |
| July 19, 2024 | GRND | A | 8,756 | · | · | 12,901 Direct | +211.24% | Acquired | (price as of 2026-10-05) |
| June 14, 2024 | GRND | S | 388,000 | $9.02 | $3,499,760 | 35,388,761 Indirect | -1.08% | Disposed | 50.1% (price as of 2026-10-05) |
| June 13, 2024 | GRND | S | 409,670 | $9.27 | $3,797,641 | 35,776,761 Indirect | -1.13% | Disposed | 46.1% (price as of 2026-10-05) |
| June 12, 2024 | GRND | S | 295,263 | $9.12 | $2,692,799 | 36,186,431 Indirect | -0.81% | Disposed | 48.5% (price as of 2026-10-05) |
| June 11, 2024 | GRND | S | 45,186 | $9.06 | $409,385 | 36,481,694 Indirect | -0.12% | Disposed | 49.4% (price as of 2026-10-05) |
| June 10, 2024 | GRND | S | 133,549 | $9.14 | $1,220,638 | 36,526,880 Indirect | -0.36% | Disposed | 48.1% (price as of 2026-10-05) |
| June 6, 2024 | GRND | S | 230,273 | $9.30 | $2,141,539 | 36,660,429 Indirect | -0.62% | Disposed | 45.6% (price as of 2026-10-05) |
| June 5, 2024 | GRND | S | 207,870 | $9.24 | $1,920,719 | 36,890,702 Indirect | -0.56% | Disposed | 46.5% (price as of 2026-10-05) |
| May 20, 2024 | GRND | S | 212,605 | $9.38 | $1,994,235 | 37,098,572 Indirect | -0.57% | Disposed | 44.3% (price as of 2026-10-05) |
| May 17, 2024 | GRND | S | 94,634 | $9.48 | $897,130 | 37,311,177 Indirect | -0.25% | Disposed | 42.8% (price as of 2026-10-05) |
| May 16, 2024 | GRND | S | 281,427 | $9.58 | $2,696,071 | 37,405,811 Indirect | -0.75% | Disposed | 41.3% (price as of 2026-10-05) |
| May 15, 2024 | GRND | S | 21,063 | $10.02 | $211,051 | 37,687,238 Indirect | -0.06% | Disposed | 35.1% (price as of 2026-10-05) |
| May 15, 2024 | GRND | S | 1,000,000 | $10.00 | $10,000,000 | 37,708,301 Indirect | -2.58% | Disposed | 35.4% (price as of 2026-10-05) |
| May 15, 2024 | GRND | S | 1,000,000 | $10.00 | $10,000,000 | 37,708,301 Indirect | -2.58% | Disposed | 35.4% (price as of 2026-10-05) |
| May 14, 2024 | GRND | S | 7,417 | $10.25 | $76,024 | 4,145 Direct | -64.15% | Disposed | 32.1% (price as of 2026-10-05) |
| May 14, 2024 | GRND | S | 7,417 | $10.25 | $76,024 | 4,145 Direct | -64.15% | Disposed | 32.1% (price as of 2026-10-05) |
| May 13, 2024 | GRND | S | 14,779 | $10.01 | $147,938 | 38,708,301 Indirect | -0.04% | Disposed | 35.3% (price as of 2026-10-05) |
| May 13, 2024 | GRND | S | 11,270 | $10.00 | $112,700 | 11,562 Direct | -49.36% | Disposed | 35.4% (price as of 2026-10-05) |
| May 13, 2024 | GRND | S | 14,779 | $10.01 | $147,938 | 38,708,301 Indirect | -0.04% | Disposed | 35.3% (price as of 2026-10-05) |
| May 13, 2024 | GRND | S | 11,270 | $10.00 | $112,700 | 11,562 Direct | -49.36% | Disposed | 35.4% (price as of 2026-10-05) |
| April 1, 2024 | GRND | S | 445,209 | $2.62 | $1,166,448 | 445,209 Indirect | -50.00% | Disposed | 416.8% (price as of 2026-10-05) |
| April 1, 2024 | GRND | S | 517,456 | $3.44 | $1,780,049 | 517,456 Indirect | -50.00% | Disposed | 293.6% (price as of 2026-10-05) |
| April 1, 2024 | GRND | S | 285,609 | $3.67 | $1,048,185 | 285,609 Indirect | -50.00% | Disposed | 268.9% (price as of 2026-10-05) |
| March 16, 2024 | GRND | S | 443,943 | $2.96 | $1,314,071 | 443,943 Indirect | -50.00% | Disposed | 357.4% (price as of 2026-10-05) |
| March 16, 2024 | GRND | S | 327,053 | $2.54 | $830,715 | 327,053 Indirect | -50.00% | Disposed | 433.1% (price as of 2026-10-05) |
| Sept. 15, 2023 | GRND | S | None | $1626814.15 | · | · Indirect | · | Disposed | -100.0% (price as of 2026-10-05) |
| Sept. 15, 2023 | GRND | S | None | $3052338.33 | · | · Indirect | · | Disposed | -100.0% (price as of 2026-10-05) |
| Sept. 15, 2023 | GRND | S | None | $2948063.52 | · | · Indirect | · | Disposed | -100.0% (price as of 2026-10-05) |
| June 21, 2023 | GRND | A | 16,582 | · | · | 22,832 Direct | +265.31% | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2022 | GRND | S | 297,157 | · | · | 0 Indirect | · | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2022 | GRND | C | 554,639 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 14, 2022 | GRND | C | 297,157 | $1640306.64 | $487,428,600,222 | 38,723,080 Indirect | +0.77% | Acquired | -100.0% (price as of 2026-10-05) |
| Nov. 18, 2022 | GRND | A | 6,250 | · | · | 6,250 Direct | · | Acquired | (price as of 2026-10-05) |
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 17, 2025 | GRND | Call Option (obligation to sell) | Common Stock | $10.73 | March 31, 2025 | 327,053 | Disposed |
| Feb. 14, 2025 | GRND | Warrants (right to buy) | Common Stock | $11.50 | Nov. 18, 2027 | 1,336,124 | Disposed |
| Dec. 31, 2024 | GRND | Call Option (obligation to sell) | Common Stock | $7.51 | Dec. 31, 2024 | 445,209 | Disposed |
| Dec. 31, 2024 | GRND | Call Option (obligation to sell) | Common Stock | $6.69 | Dec. 31, 2024 | 517,456 | Disposed |
| Dec. 31, 2024 | GRND | Call Option (obligation to sell) | Common Stock | $6.46 | Dec. 31, 2024 | 285,609 | Disposed |
| Dec. 31, 2024 | GRND | Call Option (obligation to sell) | Common Stock | $9.03 | Dec. 31, 2024 | 443,943 | Disposed |
| April 1, 2024 | GRND | Call Option (obligation to sell) | Common Stock | · | Dec. 31, 2024 | 445,209 | Disposed |
| April 1, 2024 | GRND | Call Option (obligation to sell) | Common Stock | · | Dec. 31, 2024 | 517,456 | Disposed |
| April 1, 2024 | GRND | Call Option (obligation to sell) | Common Stock | · | Dec. 31, 2024 | 285,609 | Disposed |
| March 16, 2024 | GRND | Call Option (obligation to sell) | Common Stock | · | Dec. 31, 2024 | 443,943 | Disposed |
| March 16, 2024 | GRND | Call Option (obligation to sell) | Common Stock | · | March 31, 2025 | 327,053 | Disposed |
| Sept. 15, 2023 | GRND | Guaranteed Exchangeable Note (Third Issue) [F1] | Common Stock | · | March 30, 2024 | · | Disposed |
| Sept. 15, 2023 | GRND | Guaranteed Exchangeable Note (Second Issue) [F1] | Common Stock | · | March 30, 2024 | · | Disposed |
| Sept. 15, 2023 | GRND | Guaranteed Exchangeable Note (Initial Issue) [F1] | Common Stock | · | March 30, 2024 | · | Disposed |
| Dec. 14, 2022 | GRND | Options | Common Stock | $5.52 | · | 297,157 | Acquired |
| Dec. 14, 2022 | GRND | Options | Common Stock | $2.56 | · | 554,639 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.