Insider trading

Period: 12 months Stock: SIBN 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.

14 decisions over 12 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.

14 decisions over 12 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.

14 decisions over 12 months
The trade

Minimum amount

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

14 decisions over 12 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.
14 decisions over 12 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
14 decisions over 12 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.

14 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
1 Oct 2026
DUNN JEFFREY W Director
Sold at will
$369.40K 20,000 at 18.47
55.5%
Sold half or more
1 Sep 2026
DUNN JEFFREY W Director
Sold on a plan 2×
$378.16K 20,000 at 18.91
55.5%
Sold half or more
3 Aug 2026
DUNN JEFFREY W Director
Sold at will
$369.21K 20,000 at 18.46
55.5%
Sold half or more
5 Jun 2026
DUNN JEFFREY W Director
Sold at will
$54.51K 3,575 at 15.25
18.2%
Not planned
29 May 2026
Sold at will
$49.49K 3,500 at 14.14
5.1%
Not planned
28 May 2026
Sold at will
$54.70K 3,780 at 14.47
5.2%
Not planned
4 May 2026
DUNN JEFFREY W Director
Sold at will
$4.43K 337 at 13.15
3.5%
Not planned
12 Mar 2026
Nishimura Mika Director
Sold at will
$56.70K 4,100 at 13.83
11.1%
Not planned
2 Feb 2026
DUNN JEFFREY W Director
Sold at will
$5.53K 337 at 16.42
3.3%
Not planned
8 Jan 2026
DUNN JEFFREY W Director · indirect
Sold on a plan
$425.51K 20,000 at 21.28
20.0%
Planned (10b5-1)
8 Dec 2025
DUNN JEFFREY W Director · indirect
Sold on a plan
$362.61K 18,759 at 19.33
14.6%
Planned (10b5-1)
8 Dec 2025
DUNN JEFFREY W Director
Sold on a plan
$23.99K 1,241 at 19.33
10.7%
Planned (10b5-1)
11 Nov 2025
DUNN JEFFREY W Director
Sold on a plan 2×
$1.52M 80,000 at 18.95
88.6%
Sold half or more
3 Nov 2025
DUNN JEFFREY W Director
Sold at will
$4.34K 293 at 14.80
2.6%
Not planned
Showing 1–14 of 14.