Insider trading

Period: 120 months Stock: PRTA Plan: Not on a plan × + 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.

129 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.

129 decisions over 120 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.

129 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.

129 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.
129 decisions over 120 months Remove this filter
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
129 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.

129 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
8 Oct 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$770.90K 90,000 at 8.57
20.5%
+21% of stake
7 Oct 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$1.05M 125,000 at 8.40
39.8%
+40% of stake
2 Oct 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$857.24K 100,000 at 8.57
46.7%
+47% of stake
29 Sep 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$1.41M 162,000 at 8.68
312%
Largest buy in 3 yrs
28 Sep 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$889.87K 103,500 at 8.60
124%
+124% of stake
18 Sep 2026
SCULLY WILLIAM P 10% owner
Bought
$843.46K 100,000 at 8.43
12.1%
2 Sep 2026
SCULLY WILLIAM P 10% owner
Bought
$255.74K 27,000 at 9.47
3.4%
20 Aug 2026
SCULLY WILLIAM P 10% owner
Bought
$439.43K 50,000 at 8.79
6.7%
7 Aug 2026
SCULLY WILLIAM P 10% owner
Bought
$293.05K 34,000 at 8.62
4.5%
7 Aug 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$30.17K 3,500 at 8.62
4.4%
16 Jun 2026
SCULLY WILLIAM P 10% owner
Bought
$157.99K 20,000 at 7.90
2.7%
11 Jun 2026
SCULLY WILLIAM P 10% owner
Bought
$1.02M 125,000 at 8.17
13.4%
4 Jun 2026
SCULLY WILLIAM P 10% owner
Bought
$465.30K 50,000 at 9.31
5.6%
2 Jun 2026
SCULLY WILLIAM P 10% owner
Bought
$471.30K 50,000 at 9.43
6.0%
22 May 2026
SCULLY WILLIAM P 10% owner
Bought
$981.30K 100,000 at 9.81
13.6%
6 May 2025
EcoR1 Capital, LLC 10% owner · indirect
Sold at will
$15.16M 1,984,053 at 7.64
27.2%
Not planned
5 May 2025
EcoR1 Capital, LLC 10% owner · indirect
Sold at will
$7.93M 977,693 at 8.11
11.8%
Not planned
2 May 2025
EcoR1 Capital, LLC 10% owner · indirect
Sold at will
$27.74M 3,317,938 at 8.36
28.6%
Not planned
14 Jan 2025
SCULLY WILLIAM P 10% owner
Bought
$1.28M 100,000 at 12.79
15.7%
Largest buy in 3 yrs
31 Dec 2024
SCULLY WILLIAM P 10% owner
Bought 3×
$416.39K 32,000 at 13.01
5.2%
20 Dec 2024
SCULLY WILLIAM P 10% owner
Bought
$31.81K 2,000 at 15.91
0.3%
18 Dec 2024
SCULLY WILLIAM P 10% owner
Bought
$1.02M 73,436 at 13.93
6.0%
First buy on file
20 Mar 2023
Walker Karin L Chief Accounting Officer
Sold at will 2×
$238.61K 5,000 at 47.72
100%
Sold half or more
15 Mar 2023
Walker Karin L Chief Accounting Officer
Sold, plan not stated 2×
$968.35K 20,000 at 48.42
100%
Sold half or more
15 Mar 2023
Malecek Michael J Chief Legal Officer
Sold, plan not stated 2×
$726.59K 15,000 at 48.44
100%
Sold half or more
15 Mar 2023
Garren Hideki Chief Medical Officer
Sold, plan not stated 2×
$580.94K 12,000 at 48.41
100%
Sold half or more
15 Mar 2023
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 2×
$484.31K 10,000 at 48.43
75.8%
Sold half or more
15 Feb 2023
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 2×
$533.40K 10,000 at 53.34
75.8%
Sold half or more
18 Jan 2023
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 3×
$555.31K 10,000 at 55.53
75.8%
Sold half or more
10 Jan 2023
Cooke Shane Director
Sold, plan not stated
$264.61K 5,000 at 52.92
100%
Sold half or more
5 Jan 2023
Sold, plan not stated
$263.35K 5,000 at 52.67
80.4%
Sold half or more
3 Jan 2023
Ekman Lars Director
Sold, plan not stated 7×
$886.41K 15,834 at 55.98
98.5%
Sold half or more
21 Dec 2022
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 2×
$589.69K 10,000 at 58.97
75.8%
Sold half or more
12 Dec 2022
Cooke Shane Director
Sold, plan not stated 3×
$305.19K 5,000 at 61.04
100%
Sold half or more
5 Dec 2022
Sold, plan not stated 5×
$310.36K 5,000 at 62.07
80.4%
Sold half or more
1 Dec 2022
Ekman Lars Director
Sold, plan not stated 2×
$975.41K 15,834 at 61.60
98.5%
Sold half or more
1 Dec 2022
Garren Hideki Chief Medical Officer
Sold, plan not stated
$250.04K 4,000 at 62.51
100%
Sold half or more
30 Nov 2022
Malecek Michael J Chief Legal Officer
Sold, plan not stated 7×
$311.38K 5,000 at 62.28
100%
Sold half or more
23 Nov 2022
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 3×
$610.85K 10,000 at 61.09
75.8%
Sold half or more
18 Nov 2022
Walker Karin L Chief Accounting Officer
Sold, plan not stated 2×
$570.71K 10,000 at 57.07
100%
Sold half or more
10 Nov 2022
Cooke Shane Director
Sold, plan not stated 3×
$280.83K 5,000 at 56.17
100%
Sold half or more
7 Nov 2022
Sold, plan not stated 3×
$278.08K 5,000 at 55.62
80.4%
Sold half or more
1 Nov 2022
Ekman Lars Director
Sold, plan not stated 4×
$995.66K 15,833 at 62.88
98.5%
Sold half or more
1 Nov 2022
Garren Hideki Chief Medical Officer
Sold, plan not stated 2×
$247.57K 4,000 at 61.89
100%
Sold half or more
27 Oct 2022
Malecek Michael J Chief Legal Officer
Sold, plan not stated
$1.24M 20,000 at 62.00
100%
Sold half or more
26 Oct 2022
Malecek Michael J Chief Legal Officer
Sold, plan not stated 3×
$3.92M 65,000 at 60.31
100%
Sold half or more
24 Oct 2022
Walker Karin L Chief Accounting Officer
Sold, plan not stated 4×
$1.14M 20,000 at 57.23
100%
Sold half or more
19 Oct 2022
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 4×
$564.39K 10,000 at 56.44
75.8%
Sold half or more
10 Oct 2022
Cooke Shane Director
Sold, plan not stated 2×
$279.55K 5,000 at 55.91
100%
Sold half or more
5 Oct 2022
Sold, plan not stated 4×
$289.62K 5,000 at 57.92
80.4%
Sold half or more
Showing 1–50 of 129. Page 1 of 3 Older →