Apr 29, 2026
13GVanguard Capital Management
Common Stock
New position
7.56% ownership
35,245,879 shares
Current position
WhaleWave
Ownership research
Company ownership
AMT · SEC CIK 0001053507
Broad multi-source activity
Analysis window: last 120 days.
2 of 4 source families recorded activity between Jul 28, 2026 and Oct 28, 2026.
Activity
2 of 4
Filing types detected
Recent events
4
Jul 28 – Oct 28
Insider purchases
$500.73K
Reported Schedule 13D and 13G ownership events.
Apr 29, 2026
13GVanguard Capital Management
Common Stock
7.56% ownership
35,245,879 shares
Current position
Apr 28, 2026
13GVanguard Portfolio Management
Common Stock
5.94% ownership
27,718,958 shares
Current position
Mar 26, 2026
1 reported event
Confirmed sales
$894.45K
1 matched event
The Vanguard Group
Common Stock
0% ownership
0 shares
Historical record