Insider trading

Period: 12 months Stock: AMPX Type of trade: Sold × Minimum amount: $1M × + 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.

12 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.

12 decisions over 12 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.

12 decisions over 12 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.

12 decisions over 12 months Remove this filter
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.
12 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
12 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.

12 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
15 Jun 2026
DIXON DONALD R Director · indirect
Sold at will
$1.46M 85,000 at 17.17
19.1%
Not planned
21 May 2026
Sun Kang Director
Sold at will
$1.00M 67,796 at 14.79
5.0%
Not planned
1 Apr 2026
Sun Kang Director
Sold at will 2×
$23.86M 1,500,000 at 15.91
52.8%
Sold half or more
23 Mar 2026
Sun Kang Director · indirect
Sold at will 2×
$4.10M 217,869 at 18.80
79.4%
Sold half or more
12 Mar 2026
HSIEH Wen Hsuan Director
Sold at will 2×
$7.62M 413,146 at 18.44
90.3%
Sold half or more
12 Mar 2026
Chu Steven Director
Sold at will 3×
$2.88M 155,565 at 18.50
55.0%
Sold half or more
10 Mar 2026
Chu Steven Director
Sold at will
$2.99M 166,632 at 17.92
56.7%
Sold half or more
22 Jan 2026
Stefan Constantin Ionel Chief Technology Officer
Sold at will
$5.93M 492,827 at 12.04
39.7%
Not planned
16 Jan 2026
Sun Kang Director
Sold at will
$10.52M 950,548 at 11.07
40.4%
Not planned
12 Jan 2026
Sun Kang Director
Sold at will
$5.11M 506,267 at 10.10
26.5%
Not planned
11 Dec 2025
Stefan Constantin Ionel Chief Technology Officer
Sold at will
$2.08M 198,255 at 10.51
20.9%
Not planned
17 Nov 2025
Sun Kang Chief Executive Officer
Sold at will
$10.60M 1,000,000 at 10.60
40.4%
Not planned
Showing 1–12 of 12.