Insider trading

Period: 120 months Stock: PRTA Minimum amount: $1M × + 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.

30 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.

30 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.

30 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.

30 decisions over 120 months Remove this filter
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.
30 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
30 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.

30 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
7 Oct 2026
SCULLY WILLIAM P 10% owner · indirect
Bought
$1.05M 125,000 at 8.40
39.8%
+40% 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
11 Jun 2026
SCULLY WILLIAM P 10% owner
Bought
$1.02M 125,000 at 8.17
13.4%
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
18 Dec 2024
SCULLY WILLIAM P 10% owner
Bought
$1.02M 73,436 at 13.93
6.0%
First buy on file
7 Jun 2023
Karp Carol D. Chief Regulatory Officer
Sold on a plan 4×
$1.42M 20,000 at 71.05
100%
Sold half or more
7 Jun 2023
Zago Wagner M. Chief Scientific Officer
Sold on a plan 4×
$1.35M 19,000 at 71.06
100%
Sold half or more
17 May 2023
Nguyen Tran Chief Strategy Officer and CFO
Sold on a plan 5×
$7.03M 95,000 at 73.99
96.7%
Sold half or more
17 May 2023
Kinney Gene G. President and CEO
Sold on a plan 3×
$3.32M 45,000 at 73.70
77.9%
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
28 Sep 2022
Ekman Lars Director
Sold, plan not stated
$1.52M 31,666 at 48.09
99.2%
Sold half or more
28 Sep 2022
Sold, plan not stated
$1.20M 25,000 at 48.09
95.4%
Sold half or more
20 Jul 2022
Nguyen Tran Chief Strategy Officer and CFO
Sold, plan not stated 2×
$1.37M 42,120 at 32.49
92.9%
Sold half or more
5 May 2022
EcoR1 Capital, LLC 10% owner · indirect
Sold, plan not stated
$30.84M 1,062,736 at 29.02
8.4%
5 May 2022
EcoR1 Capital, LLC 10% owner · indirect
Bought
$30.84M 1,062,736 at 29.02
10.1%
Largest buy in 3 yrs
12 Jan 2022
EcoR1 Capital, LLC 10% owner · indirect
Bought
$11.25M 300,000 at 37.50
2.7%
20 Oct 2021
Walker Karin L Chief Accounting Officer
Sold, plan not stated 3×
$1.39M 23,000 at 60.25
100%
Sold half or more
12 Jul 2021
Sold, plan not stated 13×
$1.33M 23,892 at 55.51
100%
Sold half or more
22 Jun 2021
Zago Wagner M. Chief Scientific Officer
Sold, plan not stated 4×
$5.32M 115,250 at 46.15
100%
Sold half or more
24 Mar 2021
EcoR1 Capital, LLC 10% owner · indirect
Bought
$18.16M 875,000 at 20.75
8.6%
Largest buy in 3 yrs
17 Feb 2021
EcoR1 Capital, LLC 10% owner · indirect
Bought
$4.67M 198,840 at 23.46
2.0%
16 Feb 2021
EcoR1 Capital, LLC 10% owner · indirect
Bought
$2.03M 89,200 at 22.78
0.9%
12 Feb 2021
EcoR1 Capital, LLC 10% owner · indirect
Bought 2×
$6.96M 345,300 at 20.16
3.7%
First buy on file
25 Sep 2017
Nickerson Tara Chief Business Officer
Sold, plan not stated 2×
$1.11M 17,500 at 63.60
89.7%
Sold half or more
1 Mar 2017
Kinney Gene G. President and CEO
Sold, plan not stated 2×
$1.53M 25,163 at 60.77
90.0%
Sold half or more
Showing 1–30 of 30.