Insider trading

Period: 120 months Stock: PDFS Role: Directors × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

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

27 decisions over 120 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.

27 decisions over 120 months Remove this filter
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.

27 decisions over 120 months
The trade

Minimum amount

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

27 decisions over 120 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.
27 decisions over 120 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
27 decisions over 120 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.

27 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
12 Aug 2026
Zhang Shuo Director
Sold at will
$77.26K 1,501 at 51.47
6.0%
Not planned
13 May 2025
Bought
$145.88K 7,500 at 19.45
33.2%
Largest buy in 3 yrs
24 Feb 2025
Bought
$92.24K 4,000 at 23.06
21.5%
First buy on file
11 Dec 2024
Erba Nancy Director · indirect
Sold at will
$61.62K 2,000 at 30.81
12.7%
Not planned
3 Jun 2024
Zhang Shuo Director
Sold at will
$190.63K 5,500 at 34.66
34.6%
Not planned
26 Feb 2024
Li Ye Jane Director
Sold at will
$321.16K 9,653 at 33.27
44.3%
Not planned
23 Feb 2024
Li Ye Jane Director
Sold at will
$52.05K 1,531 at 34.00
6.6%
Not planned
21 Feb 2024
BRONSON JOSEPH R Director
Sold at will
$519.45K 15,000 at 34.63
36.2%
Not planned
13 Dec 2023
Sold at will
$150.69K 4,883 at 30.86
25.6%
Not planned
12 Dec 2023
Sold at will
$27.13K 867 at 31.29
4.3%
Not planned
29 Nov 2023
Erba Nancy Director · indirect
Sold at will
$55.03K 1,800 at 30.57
10.3%
Not planned
18 Aug 2023
Zhang Shuo Director
Sold at will
$102.84K 3,047 at 33.75
16.1%
Not planned
28 Feb 2023
Sold, plan not stated
$496.15K 13,316 at 37.26
44.5%
22 Feb 2023
BRONSON JOSEPH R Director
Sold, plan not stated
$455.81K 12,500 at 36.47
24.7%
16 Nov 2022
Sold, plan not stated
$75.13K 2,500 at 30.05
7.7%
16 Nov 2022
Zhang Shuo Director
Sold, plan not stated
$59.68K 2,000 at 29.84
11.4%
15 Nov 2022
Sold, plan not stated
$74.48K 2,500 at 29.79
7.2%
15 Mar 2022
Zhang Shuo Director
Sold, plan not stated
$280.93K 11,017 at 25.50
51.5%
Sold half or more
12 Nov 2021
Sold, plan not stated
$98.99K 3,000 at 33.00
9.8%
20 Nov 2020
Sold, plan not stated
$183.80K 8,678 at 21.18
44.0%
6 Nov 2019
Sold, plan not stated
$34.87K 2,214 at 15.75
9.4%
5 Nov 2019
Sold, plan not stated
$6.16K 386 at 15.97
1.6%
13 Jun 2019
Sold, plan not stated
$12.95K 1,000 at 12.95
4.9%
18 Aug 2017
LANZA LUCIO Director
Sold, plan not stated
$900.16K 60,000 at 15.00
15.8%
9 Jun 2017
LANZA LUCIO Director
Sold, plan not stated
$790.59K 45,000 at 17.57
10.6%
24 May 2017
LANZA LUCIO Director
Sold, plan not stated
$495.10K 30,000 at 16.50
8.6%
18 May 2017
LANZA LUCIO Director
Sold, plan not stated
$249.17K 15,000 at 16.61
4.5%
Showing 1–27 of 27.