Insider trading

Period: 120 months Stock: KROS + 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.

102 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.

102 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.

102 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.

102 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.
102 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
102 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.

102 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
18 Aug 2026
Cho Esther Chief Legal Officer
Sold at will
$46.15K 4,485 at 10.29
11.1%
Not planned
18 Aug 2026
Lerner Lorena Raquel Chief Scientific Officer
Sold at will
$36.71K 3,568 at 10.29
11.5%
Not planned
18 Aug 2026
Tanini Annita Corp. Controller & VP, Finance
Sold at will
$12.59K 1,224 at 10.29
2.6%
Not planned
18 Aug 2026
Sold on a plan
$5.68K 551 at 10.30
4.4%
Planned (10b5-1)
17 Aug 2026
Bought on a plan
$10.27K 1,000 at 10.27
5.4%
Bought on a plan
15 Jul 2026
Bought on a plan
$10.61K 1,000 at 10.61
5.7%
Bought on a plan
15 Jun 2026
Bought on a plan
$10.19K 1,000 at 10.19
6.0%
Bought on a plan
11 Jun 2026
Sold on a plan
$5.52K 550 at 10.04
4.2%
Planned (10b5-1)
4 Jun 2026
Knowles Julius Director
Sold on a plan
$28.17K 2,625 at 10.73
19.3%
Planned (10b5-1)
4 Jun 2026
Farzan Nima Director
Sold on a plan
$28.17K 2,625 at 10.73
21.2%
Planned (10b5-1)
4 Jun 2026
Seth Alpna Director
Sold on a plan
$28.14K 2,625 at 10.72
21.2%
Planned (10b5-1)
15 May 2026
Bought on a plan
$10.58K 1,000 at 10.58
11.8%
Bought on a plan
15 Apr 2026
Bought on a plan
$11.70K 1,000 at 11.70
13.4%
Bought on a plan
9 Mar 2026
Bought on a plan
$22.42K 2,000 at 11.21
36.7%
Bought on a plan
19 Feb 2026
Seehra Jasbir CHIEF EXECUTIVE OFFICER
Sold at will
$113.43K 7,015 at 16.17
1.8%
Not planned
18 Feb 2026
Cho Esther SVP, General Counsel
Sold at will
$77.58K 4,745 at 16.35
10.7%
Not planned
18 Feb 2026
Regnante Keith CHIEF FINANCIAL OFFICER
Sold at will
$77.48K 4,739 at 16.35
10.8%
Not planned
18 Feb 2026
Lerner Lorena Raquel Chief Science Officer
Sold at will
$63.32K 3,873 at 16.35
11.1%
Not planned
15 Oct 2025
ADAR1 Capital Management, LLC 10% owner · indirect
Sold at will 3×
$95.66M 5,389,264 at 17.75
100%
Sold half or more
15 Oct 2025
Sold at will 4×
$84.98M 4,787,331 at 17.75
100%
Sold half or more
9 Apr 2025
ADAR1 Capital Management, LLC 10% owner · indirect
Bought 5×
$9.46M 934,258 at 10.13
27.0%
First buy on file
13 Aug 2024
ORBIMED ADVISORS LLC Director · indirect
Sold at will 2×
$11.00M 250,000 at 44.01
67.7%
Sold half or more
13 Aug 2024
GORDON CARL L Director · indirect
Sold at will 2×
$11.00M 250,000 at 44.01
67.7%
Sold half or more
4 Nov 2023
Regnante Keith Chief Financial Officer
Sold at will
$1.81M 40,000 at 45.29
100%
Sold half or more
9 Jun 2023
Regnante Keith Chief Financial Officer
Sold on a plan 3×
$908.37K 20,000 at 45.42
100%
Sold half or more
8 Jun 2023
Regnante Keith Chief Financial Officer
Sold on a plan 2×
$955.87K 20,000 at 47.79
100%
Sold half or more
15 Jul 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$1.38M 46,034 at 30.00
32.6%
13 Jul 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$57.48K 1,916 at 30.00
2.0%
11 May 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 5×
$222.05K 5,300 at 41.90
5.8%
11 Apr 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 4×
$332.70K 5,300 at 62.77
5.8%
6 Apr 2022
Rovaldi Christopher Chief Operating Officer
Sold, plan not stated
$112.32K 1,728 at 65.00
100%
Sold half or more
4 Apr 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$477.00K 7,950 at 60.00
8.5%
1 Apr 2022
Rovaldi Christopher Chief Operating Officer
Sold, plan not stated 5×
$49.68K 864 at 57.49
100%
Sold half or more
11 Mar 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 3×
$141.45K 2,650 at 53.38
3.0%
11 Feb 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 3×
$137.96K 2,650 at 52.06
3.0%
11 Jan 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 3×
$142.45K 2,650 at 53.75
3.0%
5 Jan 2022
Knowles Julius Director · indirect
Sold, plan not stated 6×
$234.99K 4,034 at 58.25
1.7%
5 Jan 2022
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$159.00K 2,650 at 60.00
3.0%
4 Jan 2022
Knowles Julius Director · indirect
Sold, plan not stated 10×
$1.15M 20,062 at 57.55
7.9%
3 Jan 2022
Knowles Julius Director · indirect
Sold, plan not stated 8×
$1.37M 23,555 at 58.01
8.9%
15 Dec 2021
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$36.75K 735 at 50.00
0.9%
13 Dec 2021
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 3×
$96.81K 1,915 at 50.55
2.2%
2 Dec 2021
Knowles Julius Director · indirect
Sold, plan not stated 8×
$1.36M 25,338 at 53.57
9.2%
1 Dec 2021
Knowles Julius Director · indirect
Sold, plan not stated 8×
$1.22M 22,313 at 54.68
7.9%
11 Nov 2021
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated 2×
$316.06K 5,300 at 59.63
5.8%
10 Nov 2021
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$954.00K 15,900 at 60.00
15.6%
4 Nov 2021
Lachey Jennifer Chief Scientific Officer
Sold, plan not stated
$530.00K 10,600 at 50.00
11.0%
3 Nov 2021
Knowles Julius Director · indirect
Sold, plan not stated 4×
$669.78K 15,967 at 41.95
5.6%
2 Nov 2021
Knowles Julius Director · indirect
Sold, plan not stated 4×
$334.15K 7,881 at 42.40
2.8%
1 Nov 2021
Knowles Julius Director · indirect
Sold, plan not stated 4×
$1.00M 23,803 at 42.15
7.8%
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