There have been 50 recent insider transactions recorded for Twist Bioscience Corporation (TWST), including 7 buys and 42 sells. Total insider buying was valued at RSU Award and total insider selling at $5.99M.
Notable insiders with recent activity include Starovasnik Melissa A., Leproust Emily M., Green Paula. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — TWST
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Starovasnik Melissa A. |
Director |
Informative Sell |
1,000 |
$51.00 |
$51K |
25,722 |
| 2026-03-20 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
1,742 |
$43.79 |
$76.28K |
858,887 |
| 2026-03-20 |
Green Paula |
SVP of Human Resources |
Informative Sell |
297 |
$43.79 |
$13K |
124,104 |
| 2026-03-20 |
Cho Dennis |
See Remarks |
Informative Sell |
354 |
$43.79 |
$15.5K |
137,903 |
| 2026-03-17 |
Chess Robert |
Director |
Option Exercise (Sell) |
10,000 |
$11.89 |
$118.9K |
18,417 |
| 2026-03-06 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
246 |
$46.43 |
$11.42K |
54,799 |
| 2026-03-06 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
2,423 |
$46.43 |
$112.49K |
860,629 |
| 2026-03-06 |
Green Paula |
SVP of Human Resources |
Informative Sell |
935 |
$46.43 |
$43.41K |
124,401 |
| 2026-03-06 |
Cho Dennis |
See Remarks |
Informative Sell |
425 |
$46.43 |
$19.73K |
138,257 |
| 2026-02-23 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
1,693 |
$46.71 |
$79.08K |
55,045 |
| 2026-02-23 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
7,205 |
$46.71 |
$336.54K |
863,052 |
| 2026-02-23 |
Green Paula |
SVP of Human Resources |
Informative Sell |
1,465 |
$46.71 |
$68.43K |
125,336 |
| 2026-02-23 |
Finn Patrick John |
President and COO |
Informative Sell |
4,294 |
$46.71 |
$200.57K |
284,129 |
| 2026-02-23 |
Laponis Adam |
Chief Financial Officer |
Informative Sell |
2,085 |
$46.71 |
$97.39K |
128,291 |
| 2026-02-23 |
Cho Dennis |
See Remarks |
Informative Sell |
844 |
$46.71 |
$39.42K |
138,682 |
| 2026-02-17 |
Green Paula |
SVP of Human Resources |
Informative Sell |
39,404 |
$52.40 |
$2.06M |
126,041 |
| 2026-02-17 |
Finn Patrick John |
President and COO |
Option Exercise (Sell) |
18,205 |
$23.33 |
$424.72K |
- |
| 2026-02-13 |
Finn Patrick John |
President and COO |
Option Exercise (Sell) |
500 |
$23.33 |
$11.67K |
18,052 |
| 2026-02-13 |
Chess Robert |
Director |
Informative Sell |
2,184 |
$48.26 |
$105.4K |
21,084 |
| 2026-02-12 |
Laponis Adam |
Chief Financial Officer |
Informative Sell |
7,000 |
$50.00 |
$350K |
130,031 |
| 2026-02-12 |
Finn Patrick John |
President and COO |
Option Exercise (Sell) |
1,000 |
$23.33 |
$23.33K |
18,705 |
| 2026-02-11 |
Cho Dennis |
See Remarks |
Informative Sell |
5,000 |
$49.93 |
$249.65K |
138,581 |
| 2026-02-09 |
Werner Robert F. |
Chief Accounting Officer |
Gift (Given) |
2,000 |
- |
- |
56,738 |
| 2026-02-06 |
Johannessen Jan |
Director |
Informative Sell |
2,200 |
$47.91 |
$105.39K |
17,754 |
| 2026-02-05 |
Crandell Keith |
Director |
RSU Award |
5,095 |
- |
- |
27,571 |
| 2026-02-05 |
Ragusa Robert P |
Director |
RSU Award |
5,095 |
- |
- |
28,983 |
| 2026-02-05 |
Johannessen Jan |
Director |
RSU Award |
5,095 |
- |
- |
19,954 |
| 2026-02-05 |
Chess Robert |
Director |
RSU Award |
5,095 |
- |
- |
23,268 |
| 2026-02-05 |
Chan Nelson |
Director |
RSU Award |
5,095 |
- |
- |
33,251 |
| 2026-02-05 |
Blake Katryn |
Director |
RSU Award |
5,095 |
- |
- |
19,448 |
| 2026-02-05 |
Starovasnik Melissa A. |
Director |
RSU Award |
5,095 |
- |
- |
26,722 |
| 2026-02-04 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
7,000 |
$45.65 |
$319.54K |
58,738 |
| 2026-02-03 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
175 |
$46.58 |
$8.15K |
65,738 |
| 2026-02-03 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
5,001 |
$46.58 |
$232.93K |
869,312 |
| 2026-02-03 |
Green Paula |
SVP of Human Resources |
Informative Sell |
1,194 |
$46.58 |
$55.61K |
165,445 |
| 2026-02-03 |
Finn Patrick John |
President and COO |
Informative Sell |
2,705 |
$46.58 |
$125.99K |
307,788 |
| 2026-02-03 |
Cho Dennis |
See Remarks |
Informative Sell |
1,099 |
$46.58 |
$51.19K |
143,581 |
| 2026-01-23 |
Finn Patrick John |
President and COO |
Informative Sell |
2,390 |
$44.91 |
$107.33K |
310,493 |
| 2026-01-13 |
Finn Patrick John |
President and COO |
Option Exercise (Sell) |
3,279 |
$8.82 |
$28.92K |
- |
| 2026-01-13 |
Laponis Adam |
Chief Financial Officer |
Informative Sell |
3,000 |
$40.00 |
$120K |
137,031 |
| 2026-01-09 |
Laponis Adam |
Chief Financial Officer |
Informative Sell |
2,738 |
$35.26 |
$96.54K |
140,031 |
| 2025-12-22 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
1,605 |
$34.56 |
$55.46K |
874,313 |
| 2025-12-22 |
Green Paula |
SVP of Human Resources |
Informative Sell |
273 |
$34.56 |
$9.43K |
166,639 |
| 2025-12-22 |
Cho Dennis |
See Remarks |
Informative Sell |
324 |
$34.56 |
$11.2K |
144,680 |
| 2025-12-08 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
230 |
$32.88 |
$7.56K |
65,913 |
| 2025-12-08 |
Leproust Emily M. |
Chief Executive Officer |
Informative Sell |
2,255 |
$32.88 |
$74.14K |
875,918 |
| 2025-12-08 |
Green Paula |
SVP of Human Resources |
Informative Sell |
877 |
$32.88 |
$28.83K |
166,912 |
| 2025-12-08 |
Cho Dennis |
See Remarks |
Informative Sell |
398 |
$32.88 |
$13.09K |
145,004 |
| 2025-11-24 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
822 |
$28.71 |
$23.6K |
66,143 |
| 2025-11-21 |
Werner Robert F. |
Chief Accounting Officer |
Informative Sell |
229 |
$26.50 |
$6.07K |
66,965 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
