Armstrong Brian
SEC CIK 1851492 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| COIN | Coinbase | COB, CEO, Dir, 10% | 287 | — | $616.37M | 114 | 2021-11-30 | 2026-01-05 |
Most active insiders at COIN, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Ehrsam Frederick Ernest III | Dir | — | $114.29M |
| 2 | Armstrong Brian | COB, CEO, Dir, 10% | — | $86.46M |
| 3 | HAAS ALESIA J | CFO | — | $80.61M |
| 4 | Choi Emilie | Pres, COO | — | $31.09M |
| 5 | WILSON FREDERICK R | Dir | — | $18.21M |
| 6 | Grewal Paul | CLO | — | $7.23M |
| 7 | Andreessen Marc L | Dir | — | $3.88M |
| 8 | Brock Lawrence J | CHRO | — | $3.47M |
| 9 | Jones Jennifer N. | CAO | — | $1.55M |
| 10 | Clement Paul | Dir | — | — |
Transactions 114
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-01-07 | 2026-01-05 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale+OE | $248.96 | -40.0K | 287 | -99% | -$9.96M |
| D | 2026-01-07 | 2026-01-05 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | M - OptEx | $18.71 | +40.0K | 40.0K | New | +$748.4K |
| DM | 2025-12-23 | 2025-12-22 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale+OE | $250.15 | -40.0K | 30.9K | -56% | -$10.01M |
| D | 2025-12-23 | 2025-12-22 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | M - OptEx | $18.71 | +40.0K | 40.0K | New | +$748.4K |
| DM | 2025-12-10 | 2025-12-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale+OE | $273.86 | -40.0K | 1,773 | -96% | -$10.95M |
| D | 2025-12-10 | 2025-12-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | M - OptEx | $18.71 | +40.0K | 40.0K | New | +$748.4K |
| D | 2025-12-10 | 2025-11-26 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | M - OptEx | $18.71 | +40.0K | 40.0K | New | +$748.4K |
| DM | 2025-12-10 | 2025-11-26 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale+OE | $257.31 | -40.0K | 26.4K | -60% | -$10.29M |
| DM | 2025-11-19 | 2025-11-17 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale+OE | $271.87 | -40.0K | 639 | -98% | -$10.87M |
| D | 2025-11-19 | 2025-11-17 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | M - OptEx | $18.71 | +40.0K | 40.0K | New | +$748.4K |
| DMI | 2025-11-14 | 2025-11-10 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $320.68 | -25.0K | 14.3K | -64% | -$8.02M |
| DI | 2025-11-14 | 2025-11-10 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-11-05 | 2025-11-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $337.49 | -25.0K | 3,597 | -87% | -$8.44M |
| DI | 2025-11-05 | 2025-11-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-10-15 | 2025-10-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $361.33 | -25.0K | 22.8K | -52% | -$9.03M |
| DI | 2025-10-15 | 2025-10-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-10-06 | 2025-10-02 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $355.46 | -25.0K | 21.7K | -54% | -$8.89M |
| DI | 2025-10-06 | 2025-10-02 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-09-17 | 2025-09-15 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $322.29 | -25.0K | 7,981 | -76% | -$8.06M |
| DI | 2025-09-17 | 2025-09-15 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DI | 2025-09-08 | 2025-09-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-09-08 | 2025-09-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $302.19 | -25.0K | 526 | -98% | -$7.55M |
| DMI | 2025-08-14 | 2025-08-12 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $326.71 | -25.0K | 8,513 | -75% | -$8.17M |
| DI | 2025-08-14 | 2025-08-12 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DI | 2025-08-06 | 2025-08-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-08-06 | 2025-08-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $317.09 | -25.0K | 526 | -98% | -$7.93M |
| DI | 2025-07-03 | 2025-07-01 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-07-03 | 2025-07-01 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $338.30 | -25.0K | 7,797 | -76% | -$8.46M |
| DMI | 2025-06-27 | 2025-06-25+ | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +450.0K | 114.3K | New | $0 |
| DMI | 2025-06-27 | 2025-06-25+ | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $362.75 | -450.0K | 264.7K | -63% | -$163.24M |
| DI | 2025-05-16 | 2025-05-14 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-05-16 | 2025-05-14 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $254.55 | -25.0K | 8,427 | -75% | -$6.36M |
| DI | 2025-05-07 | 2025-05-05 | COIN | Coinbase | Armstrong Brian | COB AND CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-05-07 | 2025-05-05 | COIN | Coinbase | Armstrong Brian | COB AND CEO, Dir, 10% | S - Sale | $200.54 | -25.0K | 9,675 | -72% | -$5.01M |
| DI | 2025-04-25 | 2025-04-23 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +20.0K | 20.5K | +3,802% | $0 |
| DMI | 2025-04-25 | 2025-04-23 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $198.44 | -20.0K | 526 | -97% | -$3.97M |
| DMI | 2025-04-07 | 2025-04-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $168.53 | -15.0K | 560 | -96% | -$2.53M |
| DI | 2025-04-07 | 2025-04-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +15.0K | 15.5K | +2,852% | $0 |
| DI | 2025-03-26 | 2025-03-25 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $198.15 | -10.0K | 526 | -95% | -$1.98M |
| DI | 2025-03-26 | 2025-03-24 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +10.0K | 10.5K | +1,901% | $0 |
| DMI | 2025-03-17 | 2025-03-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $187.23 | -15.0K | 12.4K | -55% | -$2.81M |
| DI | 2025-03-17 | 2025-03-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +15.0K | 15.5K | +2,852% | $0 |
| DMI | 2025-02-12 | 2025-02-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $275.26 | -25.0K | 2,387 | -91% | -$6.88M |
| DI | 2025-02-12 | 2025-02-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-02-05 | 2025-02-03 | COIN | Coinbase | Armstrong Brian | COB AND CEO, Dir, 10% | S - Sale | $270.99 | -25.0K | 21.0K | -54% | -$6.77M |
| DI | 2025-02-05 | 2025-02-03 | COIN | Coinbase | Armstrong Brian | COB AND CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-01-15 | 2025-01-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $243.95 | -25.0K | 13.8K | -64% | -$6.10M |
| DI | 2025-01-15 | 2025-01-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2025-01-07 | 2025-01-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $261.07 | -25.0K | 2,735 | -90% | -$6.53M |
| DI | 2025-01-07 | 2025-01-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DI | 2024-12-17 | 2024-12-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +25.0K | 25.5K | +4,753% | $0 |
| DMI | 2024-12-17 | 2024-12-16 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $314.10 | -25.0K | 18.5K | -57% | -$7.85M |
| MI | 2024-11-20 | 2024-11-18 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $328.01 | -58.3K | 526 | -99% | -$19.11M |
| DMI | 2024-11-13 | 2024-11-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $307.33 | -325.0K | 48.3K | -87% | -$99.88M |
| DI | 2024-11-13 | 2024-11-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +325.0K | 325.5K | +61,787% | $0 |
| DMI | 2024-09-05 | 2024-09-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $173.93 | -23.1K | 12.9K | -64% | -$4.01M |
| DI | 2024-09-05 | 2024-09-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.6K | +4,387% | $0 |
| DMI | 2024-08-16 | 2024-08-14 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $194.94 | -23.1K | 6,783 | -77% | -$4.50M |
| DI | 2024-08-16 | 2024-08-14 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.6K | +4,387% | $0 |
| DI | 2024-07-15 | 2024-07-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.6K | +4,387% | $0 |
| DMI | 2024-07-15 | 2024-07-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $220.32 | -23.1K | 526 | -98% | -$5.08M |
| DMI | 2024-06-05 | 2024-06-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $230.88 | -23.1K | 1,631 | -93% | -$5.33M |
| DI | 2024-06-05 | 2024-06-03 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.6K | +4,387% | $0 |
| DMI | 2024-04-08 | 2024-04-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $256.30 | -23.1K | 17.3K | -57% | -$5.91M |
| DI | 2024-04-08 | 2024-04-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.6K | +4,387% | $0 |
| I | 2024-03-27 | 2024-03-25 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | J - Other | $0.00 | +526 | 526 | New | $0 |
| DMI | 2024-03-13 | 2024-03-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $264.51 | -23.1K | 1,900 | -92% | -$6.10M |
| DI | 2024-03-13 | 2024-03-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.1K | New | $0 |
| DMI | 2024-03-12 | 2024-03-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $259.87 | -250.0K | 175.2K | -59% | -$64.97M |
| DI | 2024-03-12 | 2024-03-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +250.0K | 250.0K | New | $0 |
| DMI | 2024-03-06 | 2024-03-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $224.19 | -23.1K | 10.2K | -69% | -$5.17M |
| DI | 2024-03-06 | 2024-03-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.1K | New | $0 |
| DMI | 2024-01-16 | 2024-01-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $146.14 | -23.1K | 1,300 | -95% | -$3.37M |
| DI | 2024-01-16 | 2024-01-11 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.1K | New | $0 |
| DI | 2023-12-15 | 2023-12-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +9,153 | 9,153 | New | $0 |
| DI | 2023-12-15 | 2023-12-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $150.01 | -9,153 | 0 | -100% | -$1.37M |
| DMI | 2023-12-14 | 2023-12-12 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $139.20 | -23.1K | 22.4K | -51% | -$3.21M |
| DI | 2023-12-14 | 2023-12-12 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.1K | New | $0 |
| DMI | 2023-12-06 | 2023-12-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $141.89 | -23.1K | 5,600 | -80% | -$3.27M |
| DI | 2023-12-06 | 2023-12-04 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +23.1K | 23.1K | New | $0 |
| DMI | 2023-11-29 | 2023-11-27+ | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +92.8K | 50.0K | New | $0 |
| DI | 2023-11-29 | 2023-11-27 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | G - Gift | $0.00 | -42.8K | 0 | -100% | $0 |
| DI | 2023-11-29 | 2023-11-28 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $125.19 | -50.0K | 0 | -100% | -$6.26M |
| DMI | 2023-11-22 | 2023-11-20 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $103.92 | -4,625 | 4,425 | -51% | -$480.6K |
| DI | 2023-11-22 | 2023-11-20 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +4,625 | 4,625 | New | $0 |
| DMI | 2023-08-03 | 2023-08-01 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $92.20 | -29.7K | 27.2K | -52% | -$2.74M |
| DI | 2023-08-03 | 2023-08-01 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +29.7K | 29.7K | New | $0 |
| DMI | 2023-07-20 | 2023-07-18 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $105.69 | -59.5K | 22.9K | -72% | -$6.28M |
| DI | 2023-07-20 | 2023-07-18 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +59.5K | 59.5K | New | $0 |
| DMI | 2023-07-17 | 2023-07-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $104.25 | -27.6K | 15.1K | -65% | -$2.88M |
| DMI | 2023-07-17 | 2023-07-13 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $7.15 | +31.9K | 13.0K | New | +$227.9K |
| DMI | 2023-06-22 | 2023-06-20 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $55.99 | -29.7K | 17.3K | -63% | -$1.66M |
| DI | 2023-06-22 | 2023-06-20 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +29.7K | 29.7K | New | $0 |
| DMI | 2023-06-07 | 2023-06-05 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $59.90 | -29.7K | 26.3K | -53% | -$1.78M |
| DI | 2023-06-07 | 2023-06-05 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +29.7K | 29.7K | New | $0 |
| DI | 2023-05-26 | 2023-05-24 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +29.7K | 29.7K | New | $0 |
| DMI | 2023-05-26 | 2023-05-24 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $57.71 | -29.7K | 666 | -98% | -$1.72M |
| DMI | 2023-05-09 | 2023-05-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $56.56 | -29.7K | 6,002 | -83% | -$1.68M |
| DI | 2023-05-09 | 2023-05-08 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | C - Cnv Deriv | $0.00 | +29.7K | 29.7K | New | $0 |
| DMI | 2023-03-29 | 2023-03-27 | COIN | Coinbase | Armstrong Brian | COB, CEO, Dir, 10% | S - Sale | $62.86 | -29.7K | 4,693 | -86% | -$1.87M |
Purchase Sale Sale after option exercise All abbreviations