Insider trading

Period: 120 months Stock: CBIO Type of trade: Bought × + 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.

33 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.

33 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.

33 decisions over 120 months Remove this filter
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

33 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.
33 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
33 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.

33 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
16 Jul 2026
Fairmount Funds Management LLC Director · indirect
Bought
$12.38M 853,450 at 14.50
31.1%
+31% of stake
4 Dec 2025
Fairmount Funds Management LLC Director · indirect
Bought
$18.24M 1,360,000 at 13.41
98.0%
First buy on file
21 Jun 2024
Rock Edwin Chief Medical Officer
Bought
$30.72K 115,000 at 0.27
20.3%
+20% of stake
20 Jun 2024
Rock Edwin Chief Medical Officer
Bought
$48.11K 190,000 at 0.25
50.6%
+51% of stake
18 Jun 2024
Hahn Brian M. SVP Finance, CFO
Bought
$4.33K 17,500 at 0.25
32.9%
+33% of stake
22 Sep 2023
Rock Edwin Chief Medical Officer
Bought
$41.96K 30,403 at 1.38
8.8%
21 Sep 2023
Rock Edwin Chief Medical Officer
Bought
$48.30K 35,000 at 1.38
11.3%
10 May 2023
JUNIUS DANIEL M Director
Bought
$46.80K 30,000 at 1.56
47.4%
Largest buy in 3 yrs
8 May 2023
Johnson Bruce S SVP & Chief Commercial Officer
Bought
$21.20K 13,500 at 1.57
10.8%
First buy on file
24 Feb 2023
Bought
$170.00K 100,000 at 1.70
1.2%
23 Feb 2023
Bought
$350.76K 200,000 at 1.75
2.4%
22 Feb 2023
Bought
$269.00K 150,000 at 1.79
1.8%
21 Feb 2023
Bought
$92.50K 50,000 at 1.85
0.6%
17 Feb 2023
Bought
$341.00K 200,000 at 1.71
2.5%
16 Feb 2023
Bought
$531.13K 315,266 at 1.68
4.2%
15 Feb 2023
Bought
$2.16M 1,000,000 at 2.16
15.2%
Largest buy in 3 yrs
9 Feb 2023
Bought
$37.12K 11,451 at 3.24
0.2%
First buy on file
22 Dec 2022
Rock Edwin Chief Medical Officer
Bought
$247.50K 110,000 at 2.25
55.0%
Largest buy in 3 yrs
17 Nov 2022
JUNIUS DANIEL M Director
Bought
$37.40K 20,000 at 1.87
46.2%
First buy on file
15 Nov 2022
Rock Edwin Chief Medical Officer
Bought
$166.00K 100,000 at 1.66
100%
Largest buy in 3 yrs
14 Nov 2022
Rock Edwin Chief Medical Officer
Bought
$143.00K 100,000 at 1.43
opened
First buy on file
11 Nov 2022
Magnani John L. SVP of Research, CSO
Bought
$52.70K 45,045 at 1.17
14.0%
First buy on file
11 Nov 2022
Semerjian Harout Chief Executive Officer
Bought
$32.25K 25,000 at 1.29
opened
First buy on file
11 Nov 2022
Bought
$25.03K 19,400 at 1.29
370%
First buy on file
11 Nov 2022
Hahn Brian M. SVP Finance, CFO
Bought
$21.20K 20,000 at 1.06
54.3%
First buy on file
11 Nov 2022
Girard Armand SVP, Chief Business Officer
Bought
$6.83K 6,500 at 1.05
28.7%
First buy on file
16 Nov 2021
Bought
$82.00K 40,000 at 2.05
762%
First buy on file
4 Nov 2020
Bought 3×
$3.29M 1,266,737 at 2.60
34.1%
Largest buy in 3 yrs
30 Oct 2020
Bought 3×
$2.56M 932,612 at 2.75
27.6%
First buy on file
9 Mar 2020
JUNIUS DANIEL M Director
Bought
$68.00K 20,000 at 3.40
111%
First buy on file
5 Sep 2019
Bought 3×
$5.31M 1,668,746 at 3.18
84.7%
First buy on file
13 Aug 2019
JUNIUS DANIEL M Director
Bought
$31.80K 10,000 at 3.18
125%
First buy on file
20 Dec 2016
JUNIUS DANIEL M Director
Bought
$30.05K 5,000 at 6.01
opened
First buy on file
Showing 1–33 of 33.