Insider trading

Period: 120 months Stock: MLYS + 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.

109 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.

109 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.

109 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.

109 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.
109 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
109 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.

109 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
13 Nov 2025
Karydas Daphne Director
Sold at will 2×
$689.80K 15,000 at 45.99
100%
Sold half or more
13 Nov 2025
Gold Alexander M Director
Sold at will
$592.50K 12,742 at 46.50
100%
Sold half or more
12 Nov 2025
Gold Alexander M Director
Sold at will 2×
$323.89K 6,933 at 46.72
100%
Sold half or more
11 Nov 2025
Congleton Jon Chief Executive Officer
Sold at will 6×
$9.09M 200,000 at 45.44
24.1%
Not planned
11 Nov 2025
Levy Adam Scott CFO and Secretary
Sold at will 9×
$5.36M 119,524 at 44.88
86.0%
Sold half or more
11 Nov 2025
Gold Alexander M Director
Sold at will 2×
$659.71K 15,000 at 43.98
100%
Sold half or more
15 Oct 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan
$445.98K 10,369 at 43.01
12.7%
Planned (10b5-1)
13 Oct 2025
Congleton Jon Chief Executive Officer
Sold on a plan 2×
$644.33K 15,100 at 42.67
1.8%
Planned (10b5-1)
13 Oct 2025
Levy Adam Scott CFO and Secretary
Sold on a plan 2×
$451.98K 10,758 at 42.01
8.4%
Planned (10b5-1)
15 Sep 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan 2×
$409.27K 11,367 at 36.00
12.2%
Planned (10b5-1)
4 Sep 2025
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$30.00M 1,176,470 at 25.50
27.5%
Largest buy in 3 yrs
4 Sep 2025
AKKARAJU SRINIVAS Director · indirect
Bought
$15.00M 588,235 at 25.50
opened
13 Aug 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan
$146.99K 11,365 at 12.93
10.9%
Planned (10b5-1)
30 Jul 2025
Levy Adam Scott CFO and Secretary
Sold at will 2×
$884.37K 59,925 at 14.76
31.1%
Not planned
29 Jul 2025
Levy Adam Scott CFO and Secretary
Sold at will
$11.30K 807 at 14.00
0.4%
Not planned
28 Jul 2025
Levy Adam Scott CFO and Secretary
Sold at will
$181.80K 12,946 at 14.04
6.3%
Not planned
14 Jul 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan
$165.88K 11,366 at 14.59
10.4%
Planned (10b5-1)
11 Jul 2025
Congleton Jon Chief Executive Officer
Sold on a plan
$230.43K 15,884 at 14.51
1.8%
Planned (10b5-1)
11 Jul 2025
Levy Adam Scott CFO and Secretary
Sold on a plan
$155.45K 10,758 at 14.45
4.9%
Planned (10b5-1)
13 Jun 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan
$165.93K 11,366 at 14.60
10.1%
Planned (10b5-1)
14 May 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan
$173.77K 11,366 at 15.29
9.6%
Planned (10b5-1)
14 Apr 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan 2×
$165.19K 11,366 at 14.53
9.2%
Planned (10b5-1)
11 Apr 2025
Congleton Jon Chief Executive Officer
Sold on a plan
$186.80K 15,319 at 12.19
1.7%
Planned (10b5-1)
11 Apr 2025
Levy Adam Scott CFO and Secretary
Sold on a plan
$129.68K 10,757 at 12.06
4.8%
Planned (10b5-1)
1 Apr 2025
Rodman David Malcom Chief Medical Officer
Sold on a plan 3×
$879.01K 55,771 at 15.76
32.3%
Planned (10b5-1)
13 Mar 2025
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$17.50M 1,296,296 at 13.50
43.4%
+43% of stake
13 Mar 2025
Samsara BioCapital GP, LLC 10% owner · indirect
Bought
$8.10M 600,000 at 13.50
11.8%
Largest buy in 3 yrs
13 Mar 2025
AKKARAJU SRINIVAS Director · indirect
Bought
$8.10M 600,000 at 13.50
11.8%
13 Mar 2025
Slingsby Brian Taylor Director · indirect
Bought
$3.50M 259,259 at 13.50
3.0%
13 Jan 2025
Congleton Jon Chief Executive Officer
Sold on a plan
$166.08K 18,333 at 9.06
2.0%
Planned (10b5-1)
13 Jan 2025
Levy Adam Scott CFO and Secretary
Sold on a plan 2×
$97.86K 10,757 at 9.10
4.5%
Planned (10b5-1)
11 Nov 2024
Rodman David Malcom Chief Medical Officer
Sold on a plan
$75.40K 5,026 at 15.00
3.4%
Planned (10b5-1)
6 Nov 2024
Rodman David Malcom Chief Medical Officer
Sold on a plan
$383.07K 25,482 at 15.03
15.8%
Planned (10b5-1)
11 Oct 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$206.43K 15,271 at 13.52
1.7%
Planned (10b5-1)
11 Oct 2024
Levy Adam Scott CFO and Secretary
Sold on a plan
$146.00K 10,757 at 13.57
4.3%
Planned (10b5-1)
24 Jul 2024
Slingsby Brian Taylor Director · indirect
Sold at will
$7.18M 550,000 at 13.05
6.0%
Not planned
16 Jul 2024
Rodman David Malcom Chief Medical Officer
Sold on a plan
$7.88K 525 at 15.00
0.5%
Planned (10b5-1)
11 Jul 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$210.08K 15,746 at 13.34
1.7%
Planned (10b5-1)
11 Jul 2024
Levy Adam Scott CFO and Secretary
Sold on a plan
$141.39K 10,757 at 13.14
4.2%
Planned (10b5-1)
20 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$175.24K 14,940 at 11.73
1.6%
Planned (10b5-1)
18 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$199.07K 16,607 at 11.99
1.7%
Planned (10b5-1)
17 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$217.71K 17,766 at 12.25
1.8%
Planned (10b5-1)
14 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$203.16K 16,229 at 12.52
1.6%
Planned (10b5-1)
13 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$509.03K 39,961 at 12.74
3.9%
Planned (10b5-1)
12 Jun 2024
Congleton Jon Chief Executive Officer
Sold on a plan
$212.01K 16,607 at 12.77
1.6%
Planned (10b5-1)
11 Jun 2024
Levy Adam Scott CFO and Secretary
Sold on a plan
$1.25M 96,815 at 12.94
27.5%
Planned (10b5-1)
9 May 2024
Rodman David Malcom Chief Medical Officer
Sold on a plan
$1.50K 100 at 15.00
0.1%
Planned (10b5-1)
12 Feb 2024
Samsara BioCapital GP, LLC 10% owner · indirect
Bought
$7.50M 555,555 at 13.50
12.3%
First buy on file
22 Nov 2023
Congleton Jon Chief Executive Officer
Bought
$25.36K 4,250 at 5.97
0.4%
6 Sep 2023
Congleton Jon Chief Executive Officer
Bought
$27.18K 2,250 at 12.08
0.2%
Showing 51–100 of 109. ← Newer Page 2 of 3 Older →