George Bickerstaff
Insider
First SEC filing: Dec. 21, 2017 · Latest: Dec. 21, 2017
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-925,600
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. 5, 2026 | CDNA | S | 20,000 | $46.28 | $925,600 | 134,061 Direct | -12.98% | Disposed | 48.2% (price as of 2026-10-05) |
| June 12, 2026 | CDNA | A | 9,795 | · | · | 154,061 Direct | +6.79% | Acquired | (price as of 2026-10-05) |
| Sept. 11, 2025 | CDNA | M | 29,136 | $7.96 | $231,923 | 144,266 Direct | +25.31% | Acquired | 761.6% (price as of 2026-10-05) |
| Sept. 11, 2025 | CDNA | M | 29,136 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 13, 2025 | CDNA | A | 12,103 | · | · | 115,130 Direct | +11.75% | Acquired | (price as of 2026-10-05) |
| March 10, 2025 | CDNA | S | 20,000 | $18.36 | $367,200 | 103,027 Direct | -16.26% | Disposed | 273.5% (price as of 2026-10-05) |
| Nov. 1, 2024 | CDNA | M | 2,226 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 1, 2024 | CDNA | M | 5,255 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 1, 2024 | CDNA | M | 2,226 | $5.49 | $12,221 | 123,027 Direct | +1.84% | Acquired | 1149.2% (price as of 2026-10-05) |
| Nov. 1, 2024 | CDNA | M | 5,255 | $5.85 | $30,742 | 120,801 Direct | +4.55% | Acquired | 1072.3% (price as of 2026-10-05) |
| June 14, 2024 | CDNA | A | 16,048 | · | · | 16,048 Direct | · | Acquired | (price as of 2026-10-05) |
| June 14, 2024 | CDNA | A | 16,048 | · | · | 16,048 Direct | · | Acquired | (price as of 2026-10-05) |
| June 14, 2024 | CDNA | A | 10,570 | · | · | 115,546 Direct | +10.07% | Acquired | (price as of 2026-10-05) |
| May 14, 2024 | CDNA | M | 5,255 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 14, 2024 | CDNA | M | 5,255 | $10.00 | $52,550 | 104,976 Direct | +5.27% | Acquired | 585.8% (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 4,453 | · | · | 2,226 Direct | -66.67% | Disposed | (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 9,745 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 5,255 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 4,453 | $5.49 | $24,447 | 99,721 Direct | +4.67% | Acquired | 1149.2% (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 9,745 | $4.95 | $48,238 | 95,268 Direct | +11.39% | Acquired | 1285.5% (price as of 2026-10-05) |
| Aug. 11, 2023 | CDNA | M | 5,255 | $5.02 | $26,380 | 85,523 Direct | +6.55% | Acquired | 1266.1% (price as of 2026-10-05) |
| June 16, 2023 | CDNA | A | 29,136 | · | · | 29,136 Direct | · | Acquired | (price as of 2026-10-05) |
| June 16, 2023 | CDNA | A | 18,844 | · | · | 80,268 Direct | +30.68% | Acquired | (price as of 2026-10-05) |
| Jan. 6, 2023 | CDNA | A | 1,323 | · | · | 61,424 Direct | +2.20% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2022 | CDNA | M | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 23, 2022 | CDNA | M | 15,000 | $1.22 | $18,300 | 60,101 Direct | +33.26% | Acquired | 5521.3% (price as of 2026-10-05) |
| Oct. 4, 2022 | CDNA | A | 986 | · | · | 45,101 Direct | +2.24% | Acquired | (price as of 2026-10-05) |
| July 1, 2022 | CDNA | A | 812 | · | · | 44,115 Direct | +1.88% | Acquired | (price as of 2026-10-05) |
| June 16, 2022 | CDNA | A | 7,606 | · | · | 7,606 Direct | · | Acquired | (price as of 2026-10-05) |
| June 16, 2022 | CDNA | A | 4,863 | · | · | 43,303 Direct | +12.65% | Acquired | (price as of 2026-10-05) |
| May 9, 2022 | CDNA | A | 223 | $22.46 | $5,009 | 38,440 Direct | +0.58% | Acquired | 205.3% (price as of 2026-10-05) |
| April 25, 2022 | INVA | A | 12,647 | · | · | 137,207 Direct | +10.15% | Acquired | (price as of 2026-10-05) |
| April 25, 2022 | INVA | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| April 1, 2022 | CDNA | A | 481 | · | · | 38,217 Direct | +1.27% | Acquired | (price as of 2026-10-05) |
| Feb. 28, 2022 | CDNA | S | 25,000 | $39.11 | $977,750 | 37,736 Direct | -39.85% | Disposed | 75.4% (price as of 2026-10-05) |
| Jan. 3, 2022 | CDNA | A | 287 | · | · | 62,736 Direct | +0.46% | Acquired | (price as of 2026-10-05) |
| Oct. 1, 2021 | CDNA | A | 196 | · | · | 62,449 Direct | +0.31% | Acquired | (price as of 2026-10-05) |
| July 1, 2021 | CDNA | A | 188 | · | · | 62,253 Direct | +0.30% | Acquired | (price as of 2026-10-05) |
| June 16, 2021 | CDNA | A | 1,127 | · | · | 62,065 Direct | +1.85% | Acquired | (price as of 2026-10-05) |
| June 16, 2021 | CDNA | A | 1,812 | · | · | 1,812 Direct | · | Acquired | (price as of 2026-10-05) |
| May 24, 2021 | INVA | P | 10,000 | $13.46 | $134,600 | 124,560 Direct | +8.73% | Acquired | 53.4% (price as of 2026-10-05) |
| May 21, 2021 | INVA | P | 10,000 | $12.97 | $129,700 | 114,560 Direct | +9.56% | Acquired | 59.2% (price as of 2026-10-05) |
| May 21, 2021 | CDNA | S | 799 | $75.97 | $60,700 | 60,938 Direct | -1.29% | Disposed | -9.7% (price as of 2026-10-05) |
| May 21, 2021 | CDNA | S | 9,201 | $75.28 | $692,651 | 61,737 Direct | -12.97% | Disposed | -8.9% (price as of 2026-10-05) |
| May 14, 2021 | INVA | A | 17,482 | · | · | 104,560 Direct | +20.08% | Acquired | (price as of 2026-10-05) |
| May 12, 2021 | CDNA | S | 600 | $63.75 | $38,250 | 70,938 Direct | -0.84% | Disposed | 7.6% (price as of 2026-10-05) |
| May 12, 2021 | CDNA | S | 9,400 | $63.03 | $592,482 | 71,538 Direct | -11.61% | Disposed | 8.8% (price as of 2026-10-05) |
| April 1, 2021 | CDNA | A | 193 | · | · | 80,938 Direct | +0.24% | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2021 | CDNA | A | 258 | · | · | 80,745 Direct | +0.32% | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2020 | CDNA | S | 2,076 | $72.84 | $151,216 | 80,487 Direct | -2.51% | Disposed | -5.8% (price as of 2026-10-05) |
| Dec. 14, 2020 | CDNA | S | 3,224 | $72.04 | $232,257 | 82,563 Direct | -3.76% | Disposed | -4.8% (price as of 2026-10-05) |
| Dec. 14, 2020 | CDNA | S | 4,700 | $71.10 | $334,170 | 85,787 Direct | -5.19% | Disposed | -3.5% (price as of 2026-10-05) |
| Oct. 1, 2020 | CDNA | A | 444 | · | · | 90,487 Direct | +0.49% | Acquired | (price as of 2026-10-05) |
| July 1, 2020 | CDNA | A | 527 | · | · | 90,043 Direct | +0.59% | Acquired | (price as of 2026-10-05) |
| June 18, 2020 | CDNA | A | 4,978 | $31.35 | $156,060 | 4,978 Direct | · | Acquired | 118.8% (price as of 2026-10-05) |
| June 18, 2020 | CDNA | A | 3,190 | · | · | 88,847 Direct | +3.72% | Acquired | (price as of 2026-10-05) |
| May 13, 2020 | CDNA | S | 10,000 | $27.65 | $276,500 | 85,657 Direct | -10.45% | Disposed | 148.0% (price as of 2026-10-05) |
| April 24, 2020 | INVA | A | 16,917 | · | · | 87,078 Direct | +24.11% | Acquired | (price as of 2026-10-05) |
| April 1, 2020 | CDNA | A | 669 | · | · | 96,326 Direct | +0.70% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2020 | CDNA | A | 653 | · | · | 95,657 Direct | +0.69% | Acquired | (price as of 2026-10-05) |
| Oct. 1, 2019 | CDNA | A | 541 | · | · | 95,004 Direct | +0.57% | Acquired | (price as of 2026-10-05) |
| July 1, 2019 | CDNA | A | 468 | · | · | 94,463 Direct | +0.50% | Acquired | (price as of 2026-10-05) |
| June 17, 2019 | CDNA | A | 4,152 | $38.26 | $158,856 | 4,152 Direct | · | Acquired | 79.2% (price as of 2026-10-05) |
| June 17, 2019 | CDNA | A | 2,613 | · | · | 93,995 Direct | +2.86% | Acquired | (price as of 2026-10-05) |
| April 24, 2019 | INVA | A | 16,399 | · | · | 70,161 Direct | +30.50% | Acquired | (price as of 2026-10-05) |
| April 16, 2019 | CDNA | X | 4,415 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| April 16, 2019 | CDNA | X | 4,415 | $1.12 | $4,945 | 91,382 Direct | +5.08% | Acquired | 6023.2% (price as of 2026-10-05) |
| April 15, 2019 | CDNA | P | 4,415 | $28.26 | $124,768 | 4,415 Direct | · | Acquired | 142.7% (price as of 2026-10-05) |
| April 1, 2019 | CDNA | A | 514 | · | · | 86,967 Direct | +0.59% | Acquired | (price as of 2026-10-05) |
| March 21, 2019 | CDNA | X | 25,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| March 21, 2019 | CDNA | X | 7,980 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| March 21, 2019 | CDNA | X | 25,000 | $1.12 | $28,000 | 86,453 Direct | +40.68% | Acquired | 6023.2% (price as of 2026-10-05) |
| March 21, 2019 | CDNA | X | 7,980 | $1.12 | $8,938 | 61,453 Direct | +14.92% | Acquired | 6023.2% (price as of 2026-10-05) |
| March 20, 2019 | CDNA | P | 25,000 | $36.14 | $903,500 | 25,000 Direct | · | Acquired | 89.8% (price as of 2026-10-05) |
| March 20, 2019 | CDNA | P | 7,980 | $36.14 | $288,397 | 7,980 Direct | · | Acquired | 89.8% (price as of 2026-10-05) |
| Feb. 27, 2019 | INVA | P | 15,000 | $15.90 | $238,500 | 53,762 Direct | +38.70% | Acquired | 29.9% (price as of 2026-10-05) |
| Feb. 21, 2019 | INVA | P | 10,000 | $14.90 | $149,000 | 38,762 Direct | +34.77% | Acquired | 38.6% (price as of 2026-10-05) |
| Jan. 2, 2019 | CDNA | A | 535 | · | · | 53,473 Direct | +1.01% | Acquired | (price as of 2026-10-05) |
| Oct. 1, 2018 | CDNA | A | 734 | · | · | 52,938 Direct | +1.41% | Acquired | (price as of 2026-10-05) |
| June 29, 2018 | CDNA | A | 1,197 | · | · | 52,204 Direct | +2.35% | Acquired | (price as of 2026-10-05) |
| June 20, 2018 | CDNA | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 20, 2018 | CDNA | A | 5,000 | · | · | 51,007 Direct | +10.87% | Acquired | (price as of 2026-10-05) |
| April 24, 2018 | INVA | A | 14,249 | · | · | 28,762 Direct | +98.18% | Acquired | (price as of 2026-10-05) |
| April 2, 2018 | CDNA | A | 2,221 | · | · | 46,007 Direct | +5.07% | Acquired | (price as of 2026-10-05) |
| March 21, 2018 | INO | M | 4,090 | · | · | 8,180 Direct | -33.33% | Disposed | (price as of 2026-10-05) |
| March 21, 2018 | INO | M | 4,090 | · | · | 4,090 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2018 | CDNA | A | 2,004 | · | · | 43,786 Direct | +4.80% | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2017 | INVA | A | 14,513 | · | · | 14,513 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 9, 2017 | CDNA | A | 6,679 | · | · | 6,679 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 8, 2017 | CDNA | D | 10,948 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Oct. 2, 2017 | CDNA | A | 5,951 | · | · | 41,782 Direct | +16.61% | Acquired | (price as of 2026-10-05) |
| July 13, 2017 | CDNA | A | 15,000 | $1.22 | $18,300 | 15,000 Direct | · | Acquired | 5521.3% (price as of 2026-10-05) |
| July 13, 2017 | CDNA | A | 5,000 | · | · | 35,831 Direct | +16.22% | Acquired | (price as of 2026-10-05) |
| July 3, 2017 | CDNA | A | 9,910 | · | · | 30,831 Direct | +47.37% | Acquired | (price as of 2026-10-05) |
| May 12, 2017 | INO | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 12, 2017 | INO | A | 7,669 | · | · | 7,669 Direct | · | Acquired | (price as of 2026-10-05) |
| April 1, 2017 | CDNA | A | 2,243 | · | · | 20,921 Direct | +12.01% | Acquired | (price as of 2026-10-05) |
| March 21, 2017 | INO | A | 12,270 | · | · | 12,270 Direct | · | Acquired | (price as of 2026-10-05) |
| March 21, 2017 | INO | A | 20,000 | $5.86 | $117,200 | 20,000 Direct | · | Acquired | -98.4% (price as of 2026-10-05) |
| June 17, 2015 | CDNA | A | 5,255 | · | · | 5,255 Direct | -50.00% | Disposed | (price as of 2026-10-05) |
Showing latest 100 of 115 transactions
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 |
|---|---|---|---|---|---|---|---|
| Sept. 11, 2025 | CDNA | Stock Option (right to buy) | Common Stock | $7.96 | June 16, 2033 | 29,136 | Disposed |
| Nov. 1, 2024 | CDNA | Stock Option (right to buy) | Common Stock | $5.49 | Nov. 9, 2024 | 2,226 | Disposed |
| Nov. 1, 2024 | CDNA | Stock Option (right to buy) | Common Stock | $5.85 | June 17, 2025 | 5,255 | Disposed |
| June 14, 2024 | CDNA | Stock Option (right to buy) | Common Stock | · | June 14, 2034 | 16,048 | Acquired |
| June 14, 2024 | CDNA | Stock Option (right to buy) | Common Stock | $9.35 | June 14, 2034 | 16,048 | Acquired |
| May 14, 2024 | CDNA | Stock Option (right to buy) | Common Stock | $10.00 | July 21, 2024 | 5,255 | Disposed |
| Aug. 11, 2023 | CDNA | Option to Purchase Common Stock | Common Stock | $5.49 | Nov. 9, 2024 | 4,453 | Disposed |
| Aug. 11, 2023 | CDNA | Stock Option (right to buy) | Common Stock | $4.95 | July 15, 2026 | 9,745 | Disposed |
| Aug. 11, 2023 | CDNA | Stock Option (right to buy) | Common Stock | $5.02 | June 16, 2026 | 5,255 | Disposed |
| June 16, 2023 | CDNA | Common Stock | Common Stock | $7.96 | June 16, 2033 | 29,136 | Acquired |
| Nov. 23, 2022 | CDNA | Stock Option (right to buy) | Common Stock | $1.22 | July 13, 2027 | 15,000 | Disposed |
| June 16, 2022 | CDNA | Common Stock | Common Stock | $20.56 | June 16, 2032 | 7,606 | Acquired |
| April 25, 2022 | INVA | Non-statutory Stock Option | Common Stock | $17.79 | April 24, 2032 | 10,000 | Acquired |
| June 16, 2021 | CDNA | Stock Option (right to buy) | Common Stock | $88.70 | June 16, 2031 | 1,812 | Acquired |
| June 18, 2020 | CDNA | Stock Option (right to buy) | Common Stock | $31.35 | June 18, 2030 | 4,978 | Acquired |
| June 17, 2019 | CDNA | Stock Option (right to buy) | Common Stock | $38.26 | June 17, 2029 | 4,152 | Acquired |
| April 16, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2023 | 4,415 | Disposed |
| April 15, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2023 | 4,415 | Acquired |
| March 21, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2021 | 25,000 | Disposed |
| March 21, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2021 | 7,980 | Disposed |
| March 20, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2021 | 25,000 | Acquired |
| March 20, 2019 | CDNA | Warrant (right to buy) | Common Stock | $1.12 | June 17, 2021 | 7,980 | Acquired |
| June 20, 2018 | CDNA | Stock Option (right to buy) | Common Stock | $14.74 | June 20, 2028 | 15,000 | Acquired |
| March 21, 2018 | INO | Restricted Stock Unit | Common Stock | · | · | 4,090 | Disposed |
| Nov. 9, 2017 | CDNA | Option to Purchase Common Stock [F3] | Common Stock | · | Nov. 9, 2024 | 6,679 | Acquired |
| Nov. 8, 2017 | CDNA | Option to Purchase Common Stock | Common Stock | $12.40 | June 19, 2024 | 10,948 | Disposed |
| July 13, 2017 | CDNA | Stock Option (right to buy) | Common Stock | $1.22 | July 13, 2027 | 15,000 | Acquired |
| May 12, 2017 | INO | Common Stock Option | Common Stock | $7.14 | May 12, 2027 | 12,500 | Acquired |
| May 12, 2017 | INO | Restricted Stock Unit | Common Stock | · | · | 7,669 | Acquired |
| March 21, 2017 | INO | Restricted Stock Unit | Common Stock | · | · | 12,270 | Acquired |
| March 21, 2017 | INO | Common Stock Option | Common Stock | $5.86 | March 21, 2027 | 20,000 | Acquired |
| July 15, 2016 | CDNA | Stock Option (right to buy) | Common Stock | $4.95 | July 15, 2026 | 9,745 | Acquired |
| June 16, 2016 | CDNA | Stock Option (right to buy) | Common Stock | $5.02 | June 16, 2026 | 5,255 | Acquired |
| June 17, 2015 | CDNA | Stock Option (right to buy) | Common Stock | · | June 17, 2025 | 5,255 | Disposed |
| June 16, 2015 | CDNA | Stock Option (right to buy) | Common Stock | $6.08 | June 16, 2025 | 5,255 | Acquired |
| July 21, 2014 | CDNA | Option to Purchase Common Stock | Common Stock | $10.00 | July 21, 2024 | 5,255 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.