Executive and director filing history, acquisition and disposal balance, executive concentration, cadence, and stored market context.
Symbol
AMPXLatest filing 15 Jun 2026
Company Read
Net disposal
AMPX has 26 stored insider filings.
Acquisitions account for 30.8% of classified filings and disposals account for 69.2%.
The largest stored filing is $19.7M from SUN, KANG.
Latest filing
15 Jun 2026most recent stored row
Largest filing
$19.7Mreported transaction value
Total filings
26stored transaction rows
Acquisition value
$3.0M8 acquisitions
Disposal value
$36.0M18 disposals
Net value
$-33.0Macquisitions minus disposals
Filing cadence
Last 12 active months
Mar 20262
Apr 20266
May 20268
Jun 202610
Acquisitions 30.8% · Disposals 69.2%
Mar 2026$4.1M
Apr 2026$29.9M
May 2026$2.8M
Jun 2026$2.3M
Executive concentration
By filing count
SUN, KANGDirector · 11 filings
STEPIEN, THOMAS MDirector, Chief Executive Officer · 6 filings
DIXON, DONALD RDirector · 4 filings
STEFAN, CONSTANTIN IONELChief Technology Officer · 2 filings
SATTERTHWAITE, LIVINGSTONDirector · 1 filings
CHU, STEVENDirector · 1 filings
BAYLESS, KATHLEEN ADirector · 1 filings
Market Context
AMPX weekly market snapshot
Week 31 Jul 2026
Latest close
9.60 USDstored weekly close
1-week move
+3.9%latest weekly bar
13-week move
-22.5%medium-term context
Relative Strength
-30.4Sharemaestro indicator
Fair value gap
+55.0%price vs fair value
Trend signal
0smoothed trend state
Transaction History
Latest insider filings for AMPX
Showing 1-26 of 26
Date
15 Jun 2026
Insider
DIXON, DONALD RDirector
Side
Disposal
Shares
85000
Price
17.17
Value
1459212
Security
Common stock
Date
12 Jun 2026
Insider
BAYLESS, KATHLEEN ADirector
Side
Acquisition
Shares
10423
Price
0.00
Value
0
Security
Common stock
Date
12 Jun 2026
Insider
CHU, STEVENDirector
Side
Acquisition
Shares
10423
Price
0.00
Value
0
Security
Common stock
Date
12 Jun 2026
Insider
DIXON, DONALD RDirector
Side
Acquisition
Shares
10423
Price
0.00
Value
0
Security
Common stock
Date
12 Jun 2026
Insider
SATTERTHWAITE, LIVINGSTONDirector
Side
Acquisition
Shares
10423
Price
0.00
Value
0
Security
Common stock
Date
9 Jun 2026
Insider
DIXON, DONALD RDirector
Side
Disposal
Shares
40000
Price
19.13
Value
765200
Security
Common stock
Date
4 Jun 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Disposal
Shares
2000
Price
20.97
Value
41940
Security
Common stock
Date
4 Jun 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Acquisition
Shares
36914
Price
0.00
Value
0
Security
Common stock
Date
4 Jun 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Disposal
Shares
30384
Price
0.00
Value
0
Security
Common stock
Date
4 Jun 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Disposal
Shares
36914
Price
0.00
Value
0
Security
Common stock
Date
27 May 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Disposal
Shares
4375
Price
17.19
Value
75222
Security
Common stock
Date
27 May 2026
Insider
STEFAN, CONSTANTIN IONELChief Technology Officer
Side
Disposal
Shares
3208
Price
17.19
Value
55157
Security
Common stock
Date
27 May 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
356
Price
17.19
Value
6121
Security
Common stock
Date
26 May 2026
Insider
DIXON, DONALD RDirector
Side
Disposal
Shares
17895
Price
17.90
Value
320252
Security
Common stock
Date
21 May 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
67796
Price
14.79
Value
1002594
Security
Common stock
Date
21 May 2026
Insider
STEPIEN, THOMAS MDirector, Chief Executive Officer
Side
Disposal
Shares
60702
Price
14.79
Value
897685
Security
Common stock
Date
21 May 2026
Insider
STEFAN, CONSTANTIN IONELChief Technology Officer
Side
Disposal
Shares
28812
Price
14.79
Value
426083
Security
Common stock
Date
5 May 2026
Insider
SUN, KANGDirector
Side
Acquisition
Shares
6250
Price
0.00
Value
0
Security
Common stock
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
1250963
Price
15.73
Value
19681151
Security
Common stock
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
249037
Price
16.78
Value
4179563
Security
Common stock
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Acquisition
Shares
1312505
Price
1.78
Value
2336259
Security
Common stock
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
1312505
Price
1.78
Value
2336259
Security
Stock Option (right to buy)
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
187495
Price
3.68
Value
689982
Security
Stock Option (right to buy)
Date
1 Apr 2026
Insider
SUN, KANGDirector
Side
Acquisition
Shares
187495
Price
3.68
Value
689982
Security
Common stock
Date
23 Mar 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
152823
Price
18.69
Value
2855696
Security
Common stock
Date
23 Mar 2026
Insider
SUN, KANGDirector
Side
Disposal
Shares
65046
Price
19.06
Value
1239705
Security
Common stock
Plain English Guide
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