Insider trading

Period: 120 months Stock: KYMR + 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.

204 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.

204 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.

204 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.

204 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.
204 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
204 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.

204 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
20 Feb 2026
Esposito Pamela Director
Sold on a plan 2×
$218.27K 2,500 at 87.31
100%
Sold half or more
20 Jan 2026
Esposito Pamela Director
Sold on a plan 3×
$373.52K 5,500 at 67.91
100%
Sold half or more
31 Dec 2025
Mainolfi Nello Chief Executive Officer
Sold on a plan 2×
$2.34M 30,000 at 78.06
4.3%
Planned (10b5-1)
17 Dec 2025
Esposito Pamela Director
Sold on a plan 4×
$2.26M 27,563 at 82.16
100%
Sold half or more
12 Dec 2025
Booth Bruce Director · indirect
Sold at will 2×
$61.73K 678 at 91.04
0.1%
Not planned
11 Dec 2025
BAKER BROS. ADVISORS LP Director · indirect
Bought 2×
$172.50M 2,005,813 at 86.00
33.7%
Largest buy in 3 yrs
11 Dec 2025
Booth Bruce Director · indirect
Sold at will 2×
$556.59K 6,101 at 91.23
0.9%
Not planned
10 Dec 2025
Booth Bruce Director · indirect
Sold at will 10×
$21.08M 229,809 at 91.73
25.1%
Not planned
8 Dec 2025
Mainolfi Nello Chief Executive Officer
Sold on a plan
$8.92M 100,000 at 89.17
13.1%
Planned (10b5-1)
8 Dec 2025
Gollob Jared Chief Medical Officer
Sold on a plan 6×
$4.37M 49,307 at 88.67
31.0%
Planned (10b5-1)
8 Dec 2025
Sold on a plan 2×
$448.82K 5,000 at 89.76
100%
Sold half or more
29 Oct 2025
Mainolfi Nello Chief Executive Officer
Sold on a plan 3×
$1.83M 30,000 at 60.99
4.3%
Planned (10b5-1)
15 Oct 2025
Gollob Jared Chief Medical Officer
Sold on a plan 4×
$3.66M 59,576 at 61.42
35.1%
Planned (10b5-1)
13 Oct 2025
Sold on a plan
$295.95K 5,000 at 59.19
100%
Sold half or more
13 Oct 2025
Gollob Jared Chief Medical Officer
Sold on a plan
$186.84K 3,114 at 60.00
2.6%
Planned (10b5-1)
17 Sep 2025
Jacobs Bruce N. Chief Financial Officer
Sold on a plan
$3.96M 79,220 at 50.00
25.8%
Planned (10b5-1)
16 Sep 2025
Mainolfi Nello Chief Executive Officer
Sold on a plan
$1.47M 30,000 at 49.00
4.3%
Planned (10b5-1)
30 Jun 2025
BAKER BROS. ADVISORS LP Director · indirect
Bought 2×
$28.84M 655,500 at 44.00
12.0%
Largest buy in 3 yrs
30 Jun 2025
Bought 3×
$13.96M 317,167 at 44.00
12.8%
11 Jun 2025
Ridloff Elena Director
Sold on a plan
$225.00K 4,500 at 50.00
100%
Sold half or more
3 Jun 2025
Mainolfi Nello Chief Executive Officer
Sold on a plan
$1.47M 30,000 at 49.00
4.3%
Planned (10b5-1)
3 Jun 2025
Ridloff Elena Director
Sold on a plan 2×
$553.20K 12,000 at 46.10
100%
Sold half or more
3 Jun 2025
Sold on a plan
$311.10K 6,349 at 49.00
100%
Sold half or more
3 Jun 2025
Esposito Pamela Director
Sold on a plan
$245.19K 5,000 at 49.04
100%
Sold half or more
23 May 2025
Chadwick Jeremy G Chief Operating Officer
Sold at will
$75.44K 2,575 at 29.30
3.7%
Not planned
3 Mar 2025
Jacobs Bruce N. Chief Financial Officer
Sold at will 2×
$214.22K 7,035 at 30.45
3.4%
Not planned
3 Mar 2025
Gollob Jared Chief Medical Officer
Sold at will 2×
$174.79K 5,740 at 30.45
4.6%
Not planned
3 Mar 2025
Chiniara Ellen Chief Legal Officer
Sold at will 2×
$68.24K 2,241 at 30.45
2.7%
Not planned
3 Mar 2025
Chadwick Jeremy G Chief Operating Officer
Sold at will 2×
$42.11K 1,383 at 30.45
2.0%
Not planned
6 Jan 2025
Chiniara Ellen Chief Legal Officer
Sold at will
$130.64K 3,129 at 41.75
5.4%
Not planned
2 Dec 2024
Esposito Pamela Director
Sold on a plan
$122.50K 2,500 at 49.00
100%
Sold half or more
17 Sep 2024
Esposito Pamela Director
Sold on a plan 2×
$651.77K 13,500 at 48.28
100%
Sold half or more
26 Aug 2024
Sold on a plan
$245.51K 5,000 at 49.10
100%
Sold half or more
20 Aug 2024
BAKER BROS. ADVISORS LP Director · indirect
Bought
$46.41 1 at 46.41
0.0%
First buy on file
16 Jul 2024
Gollob Jared Chief Medical Officer
Sold on a plan 2×
$1.06M 23,145 at 45.81
19.5%
Planned (10b5-1)
15 Jul 2024
Gollob Jared Chief Medical Officer
Sold on a plan
$742.93K 16,455 at 45.15
14.7%
Planned (10b5-1)
9 Jul 2024
Booth Bruce Director · indirect
Sold on a plan 10×
$17.35M 453,960 at 38.21
38.6%
Planned (10b5-1)
13 Jun 2024
Booth Bruce Director · indirect
Sold on a plan 2×
$356.80K 10,200 at 34.98
1.3%
Planned (10b5-1)
12 Jun 2024
Booth Bruce Director · indirect
Sold on a plan 4×
$593.38K 16,740 at 35.45
2.0%
Planned (10b5-1)
7 Jun 2024
Horobin Joanna Director
Sold on a plan 2×
$280.40K 8,500 at 32.99
100%
Sold half or more
23 May 2024
Chadwick Jeremy G Chief Operating Officer
Sold at will
$90.10K 2,575 at 34.99
5.5%
Not planned
15 Mar 2024
Booth Bruce Director · indirect
Sold on a plan 6×
$2.90M 71,764 at 40.46
8.2%
Planned (10b5-1)
14 Mar 2024
Booth Bruce Director · indirect
Sold on a plan 6×
$2.23M 55,779 at 39.98
6.4%
Planned (10b5-1)
13 Mar 2024
Booth Bruce Director · indirect
Sold on a plan 4×
$5.88M 139,255 at 42.23
14.4%
Planned (10b5-1)
13 Mar 2024
Sold on a plan 2×
$4.86M 115,090 at 42.23
2.4%
Planned (10b5-1)
13 Mar 2024
Atlas Venture Fund X, L.P. 10% owner · indirect
Sold on a plan 2×
$1.02M 24,165 at 42.23
2.8%
Planned (10b5-1)
12 Mar 2024
Booth Bruce Director · indirect
Sold on a plan 4×
$6.84M 162,918 at 41.98
16.0%
Planned (10b5-1)
12 Mar 2024
Sold on a plan 2×
$5.65M 134,647 at 41.98
2.7%
Planned (10b5-1)
12 Mar 2024
Atlas Venture Fund X, L.P. 10% owner · indirect
Sold on a plan 2×
$1.19M 28,271 at 41.98
3.2%
Planned (10b5-1)
11 Mar 2024
Booth Bruce Director · indirect
Sold on a plan 4×
$2.19M 51,184 at 42.85
5.5%
Planned (10b5-1)
Showing 51–100 of 204. ← Newer Page 2 of 5 Older →