Lu James Fu Bin

Director · Ten-percent owner · GRND

As of 2026-09-16, Lu James Fu Bin has 57 Form 4 transactions on record across 1 company — 31 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Pattern in the record: open-market sales filed in December in multiple years since 2024 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct: $69KIndirect: $286.3M$286.3Mas of 2026-09-16
  • Direct $69K
  • Indirect $286.3M
GRNDindirect18,432,101 sh$286.3M
GRNDdirect4,455 sh$69K

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

GRND · 57 trades
2026-02-06: Sale, 475,000 sh ($4.8M)2026-02-05: Sale, 600,000 sh ($6.0M)2026-02-04: Sale, 375,000 sh ($3.8M)2026-02-03: Sale, 234,339 sh ($2.5M)2026-02-02: Sale, 178,427 sh ($2.0M)2026-01-30: Sale, 200,000 sh ($2.3M)2026-01-27: Sale, 200,000 sh ($2.3M)2026-01-26: Sale, 239,000 sh ($2.9M)2026-01-23: Sale, 200,000 sh ($2.4M)2026-01-22: Sale, 200,000 sh ($2.4M)2026-01-21: Sale, 200,000 sh ($2.4M)2026-01-20: Sale, 200,000 sh ($2.4M)2026-01-12: Sale, 112,368 sh ($1.5M)2026-01-09: Sale, 302,939 sh ($4.0M)2026-01-05: Sale, 92,071 sh ($1.2M)2025-12-29: Sale, 3,628 sh ($49K)2025-12-26: Sale, 43,994 sh ($594K)2025-12-23: Sale, 100,000 sh ($1.4M)2025-11-18: Sale, 75,748 sh ($1.0M)2025-11-17: Sale, 4,316 sh ($60K)2025-11-14: Sale, 363,665 sh ($5.1M)2025-11-13: Sale, 205,579 sh ($3.0M)2025-11-12: Sale, 291,948 sh ($4.3M)2025-11-11: Sale, 558,744 sh ($8.4M)2025-10-17: Sale, 250,000 sh ($3.3M)2025-10-16: Sale, 400,000 sh ($5.1M)2025-10-15: Sale, 400,000 sh ($5.2M)2025-10-13: Sale, 253,809 sh ($3.4M)2025-10-13: Sale, 96,191 sh ($1.2M)2025-10-10: Sale, 300,000 sh ($3.6M)2025-10-09: Sale, 1,000,000 sh ($13.2M)2025-06-03: Award / grant, 456 sh ($0)2025-05-28: Sale, 852,567 sh ($20.4M)2025-05-27: Sale, 251,898 sh ($6.0M)2025-05-23: Sale, 229,627 sh ($5.5M)2025-05-22: Sale, 168,009 sh ($4.0M)2025-05-14: Sale, 200,811 sh ($4.8M)2025-05-13: Sale, 1,073,942 sh ($25.8M)2025-05-12: Sale, 480,770 sh ($11.4M)2025-03-17: Exercise, 334,281 sh ($3.6M)2025-03-17: Exercise, 327,053 sh ($831K)2025-02-14: Disposition, 853,784 sh ($15.6M)2025-02-14: Exercise, 1,336,124 sh ($15.4M)2025-02-14: Exercise, 1,336,124 sh ($0)2024-12-31: Exercise, 478,199 sh ($4.3M)2024-12-31: Exercise, 568,539 sh ($3.8M)2024-12-31: Exercise, 480,947 sh ($3.6M)2024-12-31: Exercise, 318,916 sh ($2.1M)2024-12-31: Exercise, 285,609 sh ($0)2024-12-31: Exercise, 517,456 sh ($0)2024-12-31: Exercise, 445,209 sh ($0)2024-12-31: Exercise, 443,943 sh ($0)2024-12-10: Sale, 375,000 sh ($5.7M)2024-12-10: Sale, 375,000 sh ($5.7M)2024-12-05: Sale, 386,922 sh ($5.9M)2024-12-04: Sale, 692,211 sh ($10.6M)2024-07-30: Award / grant, 7,240 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-02-06GRNDSale475,000 @ $10.01$4.8M−2.5% of holding18,432,101Form 4
2026-02-05GRNDSale600,000 @ $10.07$6.0M−3.1% of holding18,907,101Form 4
2026-02-04GRNDSale375,000 @ $10.13$3.8M−1.9% of holding19,507,101Form 4
2026-02-03GRNDSale234,339 @ $10.73$2.5M−1.2% of holding19,882,101Form 4
2026-02-02GRNDSale178,427 @ $11.14$2.0M−0.9% of holding20,116,440Form 4
2026-01-30GRNDSale200,000 @ $11.27$2.3M−1.0% of holding20,294,867Form 4
2026-01-27GRNDSale200,000 @ $11.74$2.3M−1.0% of holding20,494,867Form 4
2026-01-26GRNDSale239,000 @ $11.97$2.9M−1.1% of holding20,694,867Form 4
2026-01-23GRNDSale200,000 @ $11.90$2.4M−0.9% of holding20,933,867Form 4
2026-01-22GRNDSale200,000 @ $11.98$2.4M−0.9% of holding21,133,867Form 4
2026-01-21GRNDSale200,000 @ $11.99$2.4M−0.9% of holding21,333,867Form 4
2026-01-20GRNDSale200,000 @ $12.06$2.4M−0.9% of holding21,533,867Form 4
2026-01-12GRNDSale112,368 @ $13.23$1.5M−96.2% of holding4,455Form 4
2026-01-09GRNDSale302,939 @ $13.22$4.0M−72.2% of holding116,823Form 4
2026-01-05GRNDSale92,071 @ $13.53$1.2M−18.0% of holding419,762Form 4
2025-12-29GRNDSale3,628 @ $13.50$49K−0.7% of holding511,833Form 4
2025-12-26GRNDSale43,994 @ $13.51$594K−7.9% of holding515,461Form 4
2025-12-23GRNDSale100,000 @ $13.80$1.4M−15.2% of holding559,455Form 4
2025-11-18GRNDSale75,748 @ $13.65$1.0M−0.3% of holding22,388,867Form 4
2025-11-17GRNDSale4,316 @ $14.01$60K−0.0% of holding22,464,615Form 4
2025-11-14GRNDSale363,665 @ $14.10$5.1M−1.6% of holding22,468,931Form 4
2025-11-13GRNDSale205,579 @ $14.45$3.0M−0.9% of holding22,832,596Form 4
2025-11-12GRNDSale291,948 @ $14.80$4.3M−1.3% of holding23,038,175Form 4
2025-11-11GRNDSale558,744 @ $14.99$8.4M−2.3% of holding23,330,123Form 4
2025-10-17GRNDSale250,000 @ $13.13$3.3M−1.0% of holding23,888,867Form 4
2025-10-16GRNDSale400,000 @ $12.66$5.1M−1.6% of holding24,138,867Form 4
2025-10-15GRNDSale400,000 @ $12.96$5.2M−1.6% of holding24,538,867Form 4
2025-10-13GRNDSale253,809 @ $13.22$3.4M−1.0% of holding24,938,867Form 4
2025-10-13GRNDSale96,191 @ $12.25$1.2M−0.4% of holding25,192,676Form 4
2025-10-10GRNDSale300,000 @ $11.94$3.6M−1.2% of holding25,288,867Form 4
2025-10-09GRNDSale1,000,000 @ $13.15$13.2M−3.8% of holding25,588,867Form 4
2025-05-28GRNDSale852,567 @ $23.93$20.4M−3.1% of holding26,588,867Form 4
2025-05-27GRNDSale251,898 @ $23.86$6.0M−0.9% of holding27,441,434Form 4
2025-05-23GRNDSale229,627 @ $23.99$5.5M−0.8% of holding27,693,332Form 4
2025-05-22GRNDSale168,009 @ $23.98$4.0M−0.6% of holding27,922,959Form 4
2025-05-14GRNDSale200,811 @ $24.05$4.8M−0.7% of holding28,082,445Form 4
2025-05-13GRNDSale1,073,942 @ $24.01$25.8M−3.9% of holding26,536,256Form 4
2025-05-12GRNDSale480,770 @ $23.78$11.4M−1.7% of holding27,610,198Form 4
2024-12-10GRNDSale375,000 @ $15.14$5.7M−1.2% of holding31,915,655Form 4
2024-12-10GRNDSale375,000 @ $15.14$5.7M−1.2% of holding31,540,655Form 4
2024-12-05GRNDSale386,922 @ $15.32$5.9M−1.2% of holding32,581,478Form 4
2024-12-04GRNDSale692,211 @ $15.37$10.6M−2.1% of holding32,968,400Form 4
15 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2025-06-03GRNDAward / grant4562,645Form 4
2025-03-17GRNDExercise334,28128,090,968Form 4
2025-03-17GRNDExercise327,0530Form 4
2025-02-14GRNDDisposition853,7841,757,712Form 4
2025-02-14GRNDExercise1,336,1242,611,496Form 4
2025-02-14GRNDExercise1,336,1240Form 4
2024-12-31GRNDExercise478,19928,425,249Form 4
2024-12-31GRNDExercise568,53929,222,365Form 4
2024-12-31GRNDExercise480,94729,790,903Form 4
2024-12-31GRNDExercise318,91628,903,448Form 4
2024-12-31GRNDExercise285,6090Form 4
2024-12-31GRNDExercise517,4560Form 4
2024-12-31GRNDExercise445,2090Form 4
2024-12-31GRNDExercise443,9430Form 4
2024-07-30GRNDAward / grant7,2409,885Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.