Insider trading

Period: 12 months Stock: TWST + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

137 decisions over 12 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

137 decisions over 12 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

137 decisions over 12 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

137 decisions over 12 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
137 decisions over 12 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
137 decisions over 12 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

137 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
29 May 2026
Laponis Adam Chief Financial Officer
Sold on a plan
$280.00K 4,000 at 70.00
3.4%
Planned (10b5-1)
28 May 2026
Leproust Emily M. Chief Executive Officer
Sold on a plan 4×
$1.12M 16,470 at 67.91
1.9%
Planned (10b5-1)
28 May 2026
Sold on a plan
$170.00K 2,500 at 68.00
10.1%
Planned (10b5-1)
27 May 2026
Leproust Emily M. Chief Executive Officer
Sold on a plan 2×
$1.63M 25,017 at 65.29
2.9%
Planned (10b5-1)
26 May 2026
Leproust Emily M. Chief Executive Officer
Sold on a plan
$1.58M 24,282 at 65.08
2.8%
Planned (10b5-1)
26 May 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$49.99K 800 at 62.48
1.6%
Not planned
26 May 2026
Sold on a plan
$30.52K 500 at 61.04
2.0%
Planned (10b5-1)
21 May 2026
Leproust Emily M. Chief Executive Officer
Sold at will
$366.83K 6,888 at 53.26
0.8%
Not planned
21 May 2026
Finn Patrick John President and COO
Sold at will
$221.55K 4,160 at 53.26
1.5%
Not planned
21 May 2026
Laponis Adam Chief Financial Officer
Sold at will
$107.53K 2,019 at 53.26
1.7%
Not planned
21 May 2026
Cho Dennis See Remarks
Sold at will
$87.45K 1,642 at 53.26
1.2%
Not planned
21 May 2026
Green Paula SVP of Human Resources
Sold at will
$74.51K 1,399 at 53.26
1.1%
Not planned
21 May 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$36.64K 688 at 53.26
1.4%
Not planned
12 May 2026
JOHANNESSEN JAN Director
Sold at will
$673.44K 12,000 at 56.12
40.3%
Not planned
8 May 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$282.19K 4,961 at 56.88
9.1%
Not planned
4 May 2026
Leproust Emily M. Chief Executive Officer
Sold at will
$293.00K 5,127 at 57.15
0.6%
Not planned
4 May 2026
Finn Patrick John President and COO
Sold at will
$162.53K 2,844 at 57.15
1.0%
Not planned
4 May 2026
Cho Dennis See Remarks
Sold at will
$112.13K 1,962 at 57.15
1.4%
Not planned
4 May 2026
Green Paula SVP of Human Resources
Sold at will
$63.78K 1,116 at 57.15
0.9%
Not planned
4 May 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$9.37K 164 at 57.15
0.3%
Not planned
27 Apr 2026
Sold on a plan
$30.92K 500 at 61.83
1.9%
Planned (10b5-1)
23 Apr 2026
Finn Patrick John President and COO
Sold at will
$141.03K 2,321 at 60.76
0.8%
Not planned
22 Apr 2026
Leproust Emily M. Chief Executive Officer
Sold on a plan 2×
$526.29K 8,061 at 65.29
0.9%
Planned (10b5-1)
21 Apr 2026
Leproust Emily M. Chief Executive Officer
Sold on a plan
$104.67K 1,610 at 65.01
0.2%
Planned (10b5-1)
17 Apr 2026
Laponis Adam Chief Financial Officer
Sold on a plan
$240.00K 4,000 at 60.00
3.3%
Planned (10b5-1)
14 Apr 2026
Laponis Adam Chief Financial Officer
Sold on a plan
$165.00K 3,000 at 55.00
2.4%
Planned (10b5-1)
9 Apr 2026
Laponis Adam Chief Financial Officer
Sold at will
$129.56K 2,597 at 49.89
2.0%
Not planned
1 Apr 2026
Sold on a plan
$51.00K 1,000 at 51.00
3.7%
Planned (10b5-1)
20 Mar 2026
Leproust Emily M. Chief Executive Officer
Sold at will
$76.28K 1,742 at 43.79
0.2%
Not planned
20 Mar 2026
Cho Dennis See Remarks
Sold at will
$15.50K 354 at 43.79
0.3%
Not planned
20 Mar 2026
Green Paula SVP of Human Resources
Sold at will
$13.00K 297 at 43.79
0.2%
Not planned
17 Mar 2026
CHESS ROBERT Director
Sold on a plan
$470.00K 10,000 at 47.00
32.2%
Planned (10b5-1)
6 Mar 2026
Leproust Emily M. Chief Executive Officer
Sold at will
$112.49K 2,423 at 46.43
0.3%
Not planned
6 Mar 2026
Green Paula SVP of Human Resources
Sold at will
$43.41K 935 at 46.43
0.7%
Not planned
6 Mar 2026
Cho Dennis See Remarks
Sold at will
$19.73K 425 at 46.43
0.3%
Not planned
6 Mar 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$11.42K 246 at 46.43
0.4%
Not planned
23 Feb 2026
Leproust Emily M. Chief Executive Officer
Sold at will
$336.54K 7,205 at 46.71
0.8%
Not planned
23 Feb 2026
Finn Patrick John President and COO
Sold at will
$200.57K 4,294 at 46.71
1.5%
Not planned
23 Feb 2026
Laponis Adam Chief Financial Officer
Sold at will
$97.39K 2,085 at 46.71
1.6%
Not planned
23 Feb 2026
WERNER ROBERT F. Chief Accounting Officer
Sold at will
$79.08K 1,693 at 46.71
3.0%
Not planned
23 Feb 2026
Green Paula SVP of Human Resources
Sold at will
$68.43K 1,465 at 46.71
1.2%
Not planned
23 Feb 2026
Cho Dennis See Remarks
Sold at will
$39.42K 844 at 46.71
0.6%
Not planned
17 Feb 2026
Finn Patrick John President and COO
Sold on a plan 4×
$3.56M 68,967 at 51.65
19.3%
Planned (10b5-1)
17 Feb 2026
Green Paula SVP of Human Resources
Sold at will
$2.06M 39,404 at 52.40
23.8%
Not planned
13 Feb 2026
CHESS ROBERT Director
Sold at will
$105.40K 2,184 at 48.26
9.4%
Not planned
13 Feb 2026
Finn Patrick John President and COO
Sold on a plan
$87.57K 1,750 at 50.04
0.6%
Planned (10b5-1)
12 Feb 2026
Laponis Adam Chief Financial Officer
Sold on a plan
$350.00K 7,000 at 50.00
5.1%
Planned (10b5-1)
12 Feb 2026
Finn Patrick John President and COO
Sold on a plan
$175.79K 3,500 at 50.23
1.1%
Planned (10b5-1)
11 Feb 2026
Cho Dennis See Remarks
Sold on a plan
$249.65K 5,000 at 49.93
3.5%
Planned (10b5-1)
6 Feb 2026
JOHANNESSEN JAN Director
Sold at will
$105.39K 2,200 at 47.91
11.0%
Not planned
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