Insider trading

Period: 120 months Stock: CERS Role: CEO × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

21 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.

21 decisions over 120 months Remove this filter
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.

21 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.

21 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.
21 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
21 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.

21 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
16 Jul 2026
Jayaraman Vivek K Chief Executive Officer
Sold on a plan
$52.66K 16,666 at 3.16
0.7%
Planned (10b5-1)
30 Jun 2026
Greenman William Mariner President and CEO
Sold on a plan
$299.94K 101,919 at 2.94
2.0%
Planned (10b5-1)
12 Mar 2026
Greenman William Mariner President and CEO
Sold on a plan
$742.02K 447,757 at 1.66
8.2%
Planned (10b5-1)
6 Mar 2026
Greenman William Mariner President and CEO
Sold on a plan
$156.80K 78,187 at 2.01
1.4%
Planned (10b5-1)
14 Mar 2025
Greenman William Mariner President and CEO
Sold on a plan
$178.10K 122,827 at 1.45
2.9%
Planned (10b5-1)
13 Mar 2025
Greenman William Mariner President and CEO
Sold on a plan
$103.07K 71,086 at 1.45
1.6%
Planned (10b5-1)
7 Mar 2025
Greenman William Mariner President and CEO
Sold on a plan
$91.35K 60,984 at 1.50
1.4%
Planned (10b5-1)
4 Mar 2025
Greenman William Mariner President and CEO
Sold on a plan
$35.65K 23,023 at 1.55
0.7%
Planned (10b5-1)
14 Mar 2024
Greenman William Mariner President and CEO
Sold at will
$128.20K 63,611 at 2.02
2.0%
Not planned
13 Mar 2024
Greenman William Mariner President and CEO
Sold at will
$128.18K 62,315 at 2.06
1.9%
Not planned
13 Mar 2023
Greenman William Mariner President and CEO
Sold, plan not stated 2×
$169.34K 60,480 at 2.80
2.3%
14 Mar 2022
Greenman William Mariner President and CEO
Sold, plan not stated 3×
$831.63K 165,021 at 5.04
8.0%
25 Feb 2022
Greenman William Mariner President and CEO
Sold, plan not stated 2×
$1.76M 308,263 at 5.70
16.2%
15 Mar 2021
Greenman William Mariner President and CEO
Sold, plan not stated 3×
$997.52K 156,407 at 6.38
13.8%
17 Mar 2020
Greenman William Mariner President and CEO
Sold, plan not stated 3×
$388.27K 108,011 at 3.59
13.4%
4 Jun 2019
Greenman William Mariner President and CEO
Bought
$46.00K 10,000 at 4.60
1.6%
First buy on file
13 Mar 2019
Greenman William Mariner President and CEO
Sold, plan not stated 2×
$222.29K 37,678 at 5.90
6.3%
12 Mar 2019
Greenman William Mariner President and CEO
Sold, plan not stated
$50.42K 7,781 at 6.48
1.4%
13 Mar 2018
Greenman William Mariner President and CEO
Sold, plan not stated
$50.66K 10,031 at 5.05
2.7%
12 Mar 2018
Greenman William Mariner President and CEO
Sold, plan not stated
$37.14K 7,735 at 4.80
2.2%
15 Mar 2017
Greenman William Mariner President and CEO
Sold, plan not stated
$36.99K 8,786 at 4.21
2.7%
Showing 1–21 of 21.