Katryn Blake insider trades: Twist Bioscience (TWST) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Katryn reports to the SEC
Open-market buys and sales
61 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 12, 2026 | TWST | ↓ Sell | 2,240 | $122.88 | $275K | Direct | Aug 14, 2026 (2d) |
| May 7, 2018 | CMPR | ↓ Sell | 9,297 | $140.61 | $1.3M | Direct | May 8, 2018 (1d) |
| Feb 1, 2018 | CMPR | ↓ Sell | 37,406 | $144.17 | $5.4M | Direct | Feb 2, 2018 (1d) |
| Dec 20, 2017 | CMPR | ↓ Sell | 30,000 | $118.55 | $3.6M | Direct | Dec 21, 2017 (1d) |
| Oct 2, 2017 | CMPR | ↓ Sell | 20,842 | $100.00 | $2.1M | Direct | Oct 4, 2017 (2d) |
| Sep 11, 2017 | CMPR | ↓ Sell | 1,501 | $95.00 | $143K | Direct | Sep 12, 2017 (1d) |
| Aug 22, 2017 | CMPR | ↓ Sell | 473 | $90.00 | $43K | Direct | Aug 23, 2017 (1d) |
| Jul 7, 2017 | CMPR | ↓ Sell | 2,309 | $95.00 | $219K | Direct | Jul 11, 2017 (4d) |
| Jun 2, 2017 | CMPR | ↓ Sell | 723 | $90.99 | $66K | Direct | Jun 5, 2017 (3d) |
| May 24, 2017 | CMPR | ↓ Sell | 1,916 | $90.00 | $172K | Direct | May 25, 2017 (1d) |
| Feb 7, 2017 | CMPR | ↓ Sell | 1,258 | $85.00 | $107K | Direct | Feb 8, 2017 (1d) |
| Jan 5, 2017 | CMPR | ↓ Sell | 1,028 | $95.00 | $98K | Direct | Jan 6, 2017 (1d) |
| Dec 8, 2016 | CMPR | ↓ Sell | 723 | $90.00 | $65K | Direct | Dec 12, 2016 (4d) |
| Nov 16, 2016 | CMPR | ↓ Sell | 778 | $85.00 | $66K | Direct | Nov 17, 2016 (1d) |
| Sep 2, 2016 | CMPR | ↓ Sell | 723 | $99.98 | $72K | Direct | Sep 6, 2016 (4d) |
| Aug 16, 2016 | CMPR | ↓ Sell | 777 | $97.23 | $76K | Direct | Aug 17, 2016 (1d) |
| Aug 8, 2016 | CMPR | ↓ Sell | 1,027 | $94.48 | $97K | Direct | Aug 10, 2016 (2d) |
| Jun 2, 2016 | CMPR | ↓ Sell | 723 | $99.41 | $72K | Direct | Jun 3, 2016 (1d) |
| May 27, 2016 | CMPR | ↓ Sell | 17,309 | $100.00 | $1.7M | Direct | Jun 1, 2016 (5d) |
| May 16, 2016 | CMPR | ↓ Sell | 3,112 | $93.87 | $292K | Direct | May 18, 2016 (2d) |
| May 10, 2016 | CMPR | ↓ Sell | 1,312 | $95.00 | $125K | Direct | May 12, 2016 (2d) |
| May 9, 2016 | CMPR | ↓ Sell | 703 | $90.66 | $64K | Direct | May 10, 2016 (1d) |
| Apr 20, 2016 | CMPR | ↓ Sell | 922 | $95.00 | $88K | Direct | Apr 22, 2016 (2d) |
| Feb 8, 2016 | CMPR | ↓ Sell | 1,971 | $77.00 | $152K | Direct | Feb 9, 2016 (1d) |
| Dec 1, 2015 | CMPR | ↓ Sell | 722 | $92.57 | $67K | Direct | Dec 3, 2015 (2d) |
| Nov 23, 2015 | CMPR | ↓ Sell | 579 | $85.90 | $50K | Direct | Nov 24, 2015 (1d) |
| Nov 6, 2015 | CMPR | ↓ Sell | 1,577 | $78.94 | $124K | Direct | Nov 10, 2015 (4d) |
| Sep 1, 2015 | CMPR | ↓ Sell | 721 | $68.85 | $50K | Direct | Sep 2, 2015 (1d) |
| Aug 27, 2015 | CMPR | ↓ Sell | 579 | $70.00 | $41K | Direct | Aug 28, 2015 (1d) |
| Aug 7, 2015 | CMPR | ↓ Sell | 1,891 | $70.00 | $132K | Direct | Aug 11, 2015 (4d) |
| Jul 2, 2015 | CMPR | ↓ Sell | 605 | $82.63 | $50K | Direct | Jul 6, 2015 (4d) |
| Jun 1, 2015 | CMPR | ↓ Sell | 3,688 | $82.24 | $303K | Direct | Jun 2, 2015 (1d) |
| May 26, 2015 | CMPR | ↓ Sell | 739 | $81.90 | $61K | Direct | May 27, 2015 (1d) |
| May 15, 2015 | CMPR | ↓ Sell | 2,013 | $84.94 | $171K | Direct | May 19, 2015 (4d) |
| Apr 8, 2015 | CMPR | ↓ Sell | 5,399 | $90.00 | $486K | Direct | Apr 10, 2015 (2d) |
| Apr 2, 2015 | CMPR | ↓ Sell | 505 | $87.03 | $44K | Direct | Apr 3, 2015 (1d) |
| Apr 2, 2015 | CMPR | ↓ Sell | 100 | $87.80 | $9K | Direct | Apr 3, 2015 (1d) |
| Mar 16, 2015 | CMPR | ↓ Sell | 2,300 | $81.85 | $188K | Direct | Mar 18, 2015 (2d) |
| Mar 16, 2015 | CMPR | ↓ Sell | 985 | $82.71 | $81K | Direct | Mar 18, 2015 (2d) |
| Dec 4, 2014 | CMPR | ↓ Sell | 26,845 | $70.00 | $1.9M | Direct | Dec 5, 2014 (1d) |
| Dec 3, 2014 | CMPR | ↓ Sell | 7,277 | $70.00 | $509K | Direct | Dec 4, 2014 (1d) |
| Nov 24, 2014 | CMPR | ↓ Sell | 579 | $65.48 | $38K | Direct | Nov 25, 2014 (1d) |
| Nov 6, 2014 | VPRT | ↓ Sell | 1,575 | $66.24 | $104K | Direct | Nov 7, 2014 (1d) |
| Oct 30, 2014 | VPRT | ↓ Sell | 42,631 | $60.00 | $2.6M | Direct | Nov 3, 2014 (4d) |
| Oct 2, 2014 | VPRT | ↓ Sell | 474 | $55.00 | $26K | Direct | Oct 6, 2014 (4d) |
| Sep 30, 2014 | VPRT | ↓ Sell | 1,965 | $55.00 | $108K | Direct | Oct 2, 2014 (2d) |
| Sep 17, 2014 | VPRT | ↓ Sell | 11,363 | $50.00 | $568K | Direct | Sep 19, 2014 (2d) |
| Jan 2, 2014 | VPRT | ↓ Sell | 848 | $55.39 | $47K | Direct | Jan 6, 2014 (4d) |
| Nov 25, 2013 | VPRT | ↓ Sell | 639 | $57.44 | $37K | Direct | Nov 26, 2013 (1d) |
| Nov 6, 2013 | VPRT | ↓ Sell | 606 | $55.87 | $34K | Direct | Nov 8, 2013 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other TWST insiders
Open-market trades in the last 12 months
About Katryn Blake's insider trades
Katryn Blake is an insider at Twist Bioscience (TWST). Since Mar 26, 2012, Katryn has reported no open-market purchases and 61 sales worth $25.5M on SEC Form 4. In the last 12 months: 1 sale ($275K).
Their filings also include option exercises (99 filings), shares withheld for taxes (91 filings), grants and awards (40 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every TWST insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.