Insider Trading for AMBR
View recent insider trading activity including purchases, sales, and awards. Insider trading can provide insights into how executives view their company's prospects.
Insider Trading Summary
Shares Acquired
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Shares Disposed
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Net Position
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Recent Activity (30 Days)
No insider transactions in the past 30 days.
Quarterly Activity (3 Months)
Acquisitions: 1.0K shares
Dispositions: 1.0K shares
Net: 0 shares
Quarterly insider activity shows a balanced approach to trading.
Key Insider Activity: Mar 20, 2014 to Jun 24, 2026
Cross Atlantic Capital Partners, Inc.
Other10 Percent Owner
-10.1M shares
23 transactions
CALDWELL DONALD R
Other10 Percent Owner
-10.1M shares
30 transactions
GOLDMAN SACHS GROUP INC
Other10 Percent Owner
-5.1M shares
4 transactions
IP WING WAI
DirectorDirector
-3.0K shares
4 transactions
Ngai Yuk Chun
ExecutiveCorporate Officer
-12.5K shares
4 transactions
Transaction Details
| Date | Insider | Role | Transaction | Shares | Price | Value | Owned After | SEC Filing |
|---|---|---|---|---|---|---|---|---|
| Jun 24, 2026 | IP WING WAI | DDirector | Award/Grant | 1.0K | $0.00 | $0.00 | 2.0K | View |
| Jun 24, 2026 | IP WING WAI | DDirector | Award/Grant | 1.0K | $0.00 | $0.00 | 0 | View |
| Jun 24, 2026 | IP WING WAI | DDirector | Unknown | 3.0K | $0.00 | $0.00 | 0 | View |
Apr 1, 2026 | Locked | — | — | — | — | — | — | — |
Apr 1, 2026 | Locked | — | — | — | — | — | — | — |
Apr 1, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Apr 10, 2017 | Locked | — | — | — | — | — | — | — |
Apr 10, 2017 | Locked | — | — | — | — | — | — | — |
Apr 7, 2017 | Locked | — | — | — | — | — | — | — |
Apr 7, 2017 | Locked | — | — | — | — | — | — | — |
Apr 6, 2017 | Locked | — | — | — | — | — | — | — |
Apr 6, 2017 | Locked | — | — | — | — | — | — | — |
Apr 5, 2017 | Locked | — | — | — | — | — | — | — |
Apr 5, 2017 | Locked | — | — | — | — | — | — | — |
Apr 4, 2017 | Locked | — | — | — | — | — | — | — |
Apr 4, 2017 | Locked | — | — | — | — | — | — | — |
Apr 3, 2017 | Locked | — | — | — | — | — | — | — |
Apr 3, 2017 | Locked | — | — | — | — | — | — | — |
Mar 31, 2017 | Locked | — | — | — | — | — | — | — |
Mar 31, 2017 | Locked | — | — | — | — | — | — | — |
Mar 30, 2017 | Locked | — | — | — | — | — | — | — |
Mar 30, 2017 | Locked | — | — | — | — | — | — | — |
Nov 29, 2016 | Locked | — | — | — | — | — | — | — |
Nov 29, 2016 | Locked | — | — | — | — | — | — | — |
Nov 28, 2016 | Locked | — | — | — | — | — | — | — |
Nov 28, 2016 | Locked | — | — | — | — | — | — | — |
Nov 23, 2016 | Locked | — | — | — | — | — | — | — |
Nov 23, 2016 | Locked | — | — | — | — | — | — | — |
Sep 14, 2016 | Locked | — | — | — | — | — | — | — |
Sep 14, 2016 | Locked | — | — | — | — | — | — | — |
Feb 19, 2016 | Locked | — | — | — | — | — | — | — |
Feb 19, 2016 | Locked | — | — | — | — | — | — | — |
Feb 10, 2016 | Locked | — | — | — | — | — | — | — |
Sep 16, 2015 | Locked | — | — | — | — | — | — | — |
Sep 16, 2015 | Locked | — | — | — | — | — | — | — |
Feb 19, 2015 | Locked | — | — | — | — | — | — | — |
Sep 10, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 26, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Mar 20, 2014 | Locked | — | — | — | — | — | — | — |
Click "View" in the SEC Filing column to access the detailed SEC form submission for each transaction.
Executive Activity:
Executives have been net sellers of AMBR stock, though this may be part of planned diversification.