Insider trading

Period: 120 months Stock: CERS Role: Directors × + 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.

36 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.

36 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.

36 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.

36 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.
36 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
36 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.

36 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
9 Jun 2026
BJERKHOLT ERIC Director
Sold at will
$53.18K 20,454 at 2.60
7.2%
Not planned
25 Aug 2025
Gregory Dean A. Director
Bought
$31.25K 25,000 at 1.25
40.5%
Largest buy in 3 yrs
13 Dec 2024
Gregory Dean A. Director
Bought on a plan
$2.93K 1,725 at 1.70
2.9%
Bought on a plan
12 Dec 2024
BJERKHOLT ERIC Director
Sold at will
$35.70K 20,000 at 1.79
11.0%
Not planned
13 May 2024
Shan Hua Director
Bought
$4.97K 2,500 at 1.99
8.4%
First buy on file
10 May 2024
Bought
$3.58K 2,000 at 1.79
1.9%
First buy on file
9 May 2024
Witney Frank Director
Bought
$37.80K 20,000 at 1.89
12.5%
First buy on file
9 May 2024
Bought
$4.69K 2,500 at 1.88
2.4%
13 Dec 2023
BJERKHOLT ERIC Director
Bought
$16.20K 10,000 at 1.62
7.6%
22 Aug 2023
Lucena Ann Director
Bought
$12.64K 7,500 at 1.69
11.6%
First buy on file
21 Aug 2023
BJERKHOLT ERIC Director
Bought
$17.15K 10,000 at 1.72
8.2%
Largest buy in 3 yrs
26 May 2023
Bought
$9.54K 5,000 at 1.91
4.4%
First buy on file
24 May 2023
SCHULZE GAIL Director
Bought
$19.98K 9,850 at 2.03
13.4%
First buy on file
23 May 2023
BJERKHOLT ERIC Director
Bought
$10.00K 5,000 at 2.00
6.5%
First buy on file
10 Nov 2022
Sold, plan not stated
$48.88K 12,500 at 3.91
9.9%
9 Nov 2021
SCHULZE GAIL Director
Sold, plan not stated
$188.43K 25,000 at 7.54
47.1%
4 Aug 2021
Sold, plan not stated
$80.48K 12,877 at 6.25
12.1%
18 May 2021
Sold, plan not stated
$28.74K 5,000 at 5.75
7.7%
16 Feb 2021
Sold, plan not stated
$77.80K 10,000 at 7.78
14.3%
22 Dec 2020
Sold, plan not stated 2×
$326.86K 39,336 at 8.31
16.4%
14 Dec 2020
SCHULZE GAIL Director
Sold, plan not stated 2×
$456.82K 62,393 at 7.32
100%
Sold half or more
17 Nov 2020
Sold, plan not stated
$62.51K 10,000 at 6.25
14.3%
24 Aug 2020
Sold, plan not stated
$126.46K 16,008 at 7.90
7.1%
7 Aug 2020
Sold, plan not stated 2×
$285.15K 40,076 at 7.12
16.5%
11 Feb 2020
MOORE TIMOTHY L. Director
Bought
$17.17K 3,614 at 4.75
84.1%
First buy on file
29 Jan 2020
Witney Frank Director
Bought
$100.00K 24,096 at 4.15
66.5%
First buy on file
29 Jan 2020
BJERKHOLT ERIC Director
Bought
$83.00K 20,000 at 4.15
467%
First buy on file
29 Jan 2020
Bought
$40.00K 9,639 at 4.15
5.4%
First buy on file
29 Jan 2020
MOORE TIMOTHY L. Director
Bought
$15.00K 3,614 at 4.15
84.1%
First buy on file
29 Jan 2020
Bought
$10.00K 2,410 at 4.15
opened
First buy on file
29 Jan 2020
Bought
$4.15K 1,000 at 4.15
2.2%
First buy on file
4 Dec 2019
SCHULZE GAIL Director
Sold, plan not stated
$62.85K 15,000 at 4.19
36.6%
19 Aug 2019
Sold, plan not stated 2×
$50.74K 9,131 at 5.56
4.9%
16 Aug 2019
Sold, plan not stated
$50.74K 9,664 at 5.25
5.4%
8 Jun 2018
SCHULZE GAIL Director
Sold, plan not stated 2×
$349.13K 52,500 at 6.65
66.9%
Sold half or more
18 May 2018
Sold, plan not stated 2×
$152.95K 23,000 at 6.65
16.1%
Showing 1–36 of 36.