Insider trading

Period: 120 months Stock: PRTA + Add filter Clear all
Views & alerts

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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.

170 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.

170 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.

170 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.

170 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.
170 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
170 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.

170 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%
29 Jul 2026
Isaacs Michael John General Counsel & Company Sec.
Sold on a plan
$71.06K 8,386 at 8.47
19.0%
Planned (10b5-1)
29 Jul 2026
Kingston Anne Evans Chief Strategy Officer
Sold on a plan
$64.92K 7,662 at 8.47
12.1%
Planned (10b5-1)
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
24 Jan 2024
Walker Karin L Chief Accounting Officer
Sold on a plan
$170.00K 5,000 at 34.00
100%
Sold half or more
20 Dec 2023
Walker Karin L Chief Accounting Officer
Sold on a plan 2×
$185.95K 5,000 at 37.19
100%
Sold half or more
30 Nov 2023
Walker Karin L Chief Accounting Officer
Sold on a plan
$170.00K 5,000 at 34.00
100%
Sold half or more
25 Oct 2023
Walker Karin L Chief Accounting Officer
Sold on a plan 3×
$205.19K 5,000 at 41.04
100%
Sold half or more
11 Oct 2023
Smith Brandon S. Chief Operating Officer
Sold on a plan 2×
$186.98K 4,000 at 46.75
100%
Sold half or more
4 Oct 2023
Karp Carol D. Chief Regulatory Officer
Sold on a plan 2×
$233.08K 5,000 at 46.62
100%
Sold half or more
27 Sep 2023
Malecek Michael J Chief Legal Officer
Sold on a plan 2×
$236.88K 5,000 at 47.38
100%
Sold half or more
19 Sep 2023
Walker Karin L Chief Accounting Officer
Sold on a plan
$261.81K 5,000 at 52.36
100%
Sold half or more
13 Sep 2023
Smith Brandon S. Chief Operating Officer
Sold on a plan 2×
$221.96K 4,000 at 55.49
100%
Sold half or more
13 Sep 2023
Garren Hideki Chief Medical Officer
Sold on a plan
$110.95K 2,000 at 55.48
100%
Sold half or more
6 Sep 2023
Karp Carol D. Chief Regulatory Officer
Sold on a plan 2×
$273.80K 5,000 at 54.76
100%
Sold half or more
30 Aug 2023
Malecek Michael J Chief Legal Officer
Sold on a plan 3×
$275.07K 5,000 at 55.01
100%
Sold half or more
18 Aug 2023
Walker Karin L Chief Accounting Officer
Sold on a plan
$285.92K 5,000 at 57.18
100%
Sold half or more
16 Aug 2023
Smith Brandon S. Chief Operating Officer
Sold on a plan 3×
$234.84K 4,000 at 58.71
100%
Sold half or more
16 Aug 2023
Garren Hideki Chief Medical Officer
Sold on a plan 3×
$117.48K 2,000 at 58.74
100%
Sold half or more
2 Aug 2023
Karp Carol D. Chief Regulatory Officer
Sold on a plan 2×
$335.07K 5,000 at 67.01
100%
Sold half or more
2 Aug 2023
Zago Wagner M. Chief Scientific Officer
Sold on a plan 2×
$268.18K 4,000 at 67.05
100%
Sold half or more
26 Jul 2023
Malecek Michael J Chief Legal Officer
Sold on a plan 3×
$311.64K 5,000 at 62.33
100%
Sold half or more
19 Jul 2023
Walker Karin L Chief Accounting Officer
Sold on a plan 2×
$345.94K 5,000 at 69.19
100%
Sold half or more
12 Jul 2023
Smith Brandon S. Chief Operating Officer
Sold on a plan 2×
$270.03K 4,000 at 67.51
100%
Sold half or more
12 Jul 2023
Garren Hideki Chief Medical Officer
Sold on a plan 2×
$135.03K 2,000 at 67.51
100%
Sold half or more
5 Jul 2023
Karp Carol D. Chief Regulatory Officer
Sold on a plan 2×
$340.64K 5,000 at 68.13
100%
Sold half or more
5 Jul 2023
Zago Wagner M. Chief Scientific Officer
Sold on a plan 2×
$272.65K 4,000 at 68.16
100%
Sold half or more
3 Jul 2023
Selkoe Dennis J. Director
Sold on a plan
$337.15K 5,000 at 67.43
63.7%
Sold half or more
28 Jun 2023
Malecek Michael J Chief Legal Officer
Sold on a plan 3×
$349.12K 5,000 at 69.82
100%
Sold half or more
20 Jun 2023
Walker Karin L Chief Accounting Officer
Sold on a plan 3×
$344.49K 5,000 at 68.90
100%
Sold half or more
Showing 1–50 of 170. Page 1 of 4 Older →