Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Gritstone Bio, Inc. (GRTS) since 2018 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Gritstone Bio, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1656634.
Total stock buying since 2018: $15,022,814.
Total stock sales since 2018: $1,080,434.
Total stock option exercises since 2018: $80,068.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2024 | 0 | $0 | 86,769 | $56,105 | 0 | $0 |
| 2023 | 12,000 | $22,824 | 0 | $0 | 0 | $0 |
| 2021 | 0 | $0 | 48,900 | $916,699 | 89,624 | $65,570 |
| 2020 | 1,347,709 | $5,000,000 | 0 | $0 | 10,000 | $3,449 |
| 2019 | 0 | $0 | 10,000 | $107,630 | 20,000 | $11,049 |
| 2018 | 666,666 | $9,999,990 | 0 | $0 | 0 | $0 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2024-12 | 0 | $0 | 12,000 | $180 | 0 | $0 |
| 2024-05 | 0 | $0 | 74,769 | $55,925 | 0 | $0 |
| 2023-05 | 12,000 | $22,824 | 0 | $0 | 0 | $0 |
| 2021-12 | 0 | $0 | 1,000 | $13,010 | 1,000 | $345 |
| 2021-11 | 0 | $0 | 1,000 | $11,140 | 1,000 | $345 |
| 2021-10 | 0 | $0 | 2,000 | $21,390 | 2,000 | $690 |
| 2021-09 | 0 | $0 | 2,000 | $22,748 | 2,000 | $690 |
| 2021-05 | 0 | $0 | 2,900 | $26,111 | 2,900 | $2,201 |
| 2021-03 | 0 | $0 | 0 | $0 | 50,724 | $38,499 |
| 2021-01 | 0 | $0 | 40,000 | $822,300 | 30,000 | $22,800 |
| 2020-12 | 1,347,709 | $5,000,000 | 0 | $0 | 0 | $0 |
| 2020-08 | 0 | $0 | 0 | $0 | 10,000 | $3,449 |
| 2019-08 | 0 | $0 | 10,000 | $107,630 | 10,000 | $7,600 |
| 2019-01 | 0 | $0 | 0 | $0 | 10,000 | $3,449 |
| 2018-09 | 666,666 | $9,999,990 | 0 | $0 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2024-12-18 | Economides Vassiliki (EVP, CHIEF FINANCIAL OFFICER) | Sale | 12,000 | .01 | 180 |
| 2024-05-16 | Economides Vassiliki (EVP, CHIEF FINANCIAL OFFICER) | Sale | 13,749 | .75 | 10,284 |
| 2024-05-16 | Hawryluk Matthew (EVP, CHIEF BUSINESS OFFICER) | Sale | 9,259 | .75 | 6,925 |
| 2024-05-16 | Jooss Karin (SEE REMARKS) | Sale | 13,749 | .75 | 10,284 |
| 2024-05-16 | Jones Erin (EVP, CHIEF OPERATING OFFICER) | Sale | 13,749 | .75 | 10,284 |
| 2024-05-16 | Allen Andrew R (PRESIDENT AND CEO) | Sale | 24,263 | .75 | 18,148 |
| 2023-05-23 | Economides Vassiliki (See Remarks) | Buy | 12,000 | 1.90 | 22,824 |
| 2021-12-01 | Jones Erin (Chief Operating Officer) | Sale | 1,000 | 13.01 | 13,010 |
| 2021-12-01 | Jones Erin (Chief Operating Officer) | Option Ex | 1,000 | .34 | 345 |
| 2021-11-01 | Jones Erin (See Remarks) | Sale | 1,000 | 11.14 | 11,140 |
| 2021-11-01 | Jones Erin (See Remarks) | Option Ex | 1,000 | .34 | 345 |
| 2021-10-04 | Jones Erin (See Remarks) | Sale | 1,000 | 10.71 | 10,710 |
| 2021-10-04 | Jones Erin (See Remarks) | Option Ex | 1,000 | .34 | 345 |
| 2021-10-01 | Jones Erin (See Remarks) | Sale | 1,000 | 10.68 | 10,680 |
| 2021-10-01 | Jones Erin (See Remarks) | Option Ex | 1,000 | .34 | 345 |
| 2021-09-08 | Jones Erin (See Remarks) | Sale | 2,000 | 11.37 | 22,748 |
| 2021-09-08 | Jones Erin (See Remarks) | Option Ex | 2,000 | .34 | 690 |
| 2021-05-27 | Rousseau Raphael (See Remarks) | Sale | 2,900 | 9.00 | 26,111 |
| 2021-05-27 | Rousseau Raphael (See Remarks) | Option Ex | 2,900 | .76 | 2,201 |
| 2021-03-08 | Yelensky Roman (See Remarks) | Option Ex | 50,724 | .76 | 38,499 |
| 2021-01-20 | Rousseau Raphael (See Remarks) | Sale | 10,000 | 25.07 | 250,710 |
| 2021-01-20 | Rousseau Raphael (See Remarks) | Option Ex | 10,000 | .76 | 7,600 |
| 2021-01-19 | Yelensky Roman (See Remarks) | Sale | 10,000 | 22.10 | 221,030 |
| 2021-01-19 | Rousseau Raphael (See Remarks) | Sale | 20,000 | 17.53 | 350,560 |
| 2021-01-19 | Rousseau Raphael (See Remarks) | Option Ex | 20,000 | .76 | 15,200 |
| 2020-12-30 | Woiwode Thomas (Director) | Buy | 1,347,709 | 3.71 | 5,000,000 |
| 2020-08-17 | Jones Erin (See Remarks) | Option Ex | 10,000 | .34 | 3,449 |
| 2019-08-21 | Rousseau Raphael (See Remarks) | Sale | 10,000 | 10.76 | 107,630 |
| 2019-08-21 | Rousseau Raphael (See Remarks) | Option Ex | 10,000 | .76 | 7,600 |
| 2019-01-29 | Jones Erin (See Remarks) | Option Ex | 10,000 | .34 | 3,449 |
| 2018-09-28 | Clarus Ventures Iii, Llc | Buy | 333,333 | 15.00 | 4,999,995 |
| 2018-09-28 | Simon Nicholas | Buy | 333,333 | 15.00 | 4,999,995 |
Insider trading activities including stock purchases, stock sales, and option exercises of GRTS listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Gritstone Bio, Inc. (symbol GRTS, CIK number 1656634) see the Securities and Exchange Commission (SEC) website.