AMPRIUS TECHNOLOGIES INC (AMPX) Stock Ownership

NYSE:AMPX • US03214Q1085

Current stock price

16.12 USD
-1.04 (-6.06%)
At close:
15.9209 USD
-0.2 (-1.24%)
After Hours:

AMPX Ownership information

AMPX Ownership Chart.AMPX Ownership Chart: showing Insider, Institutional ownership and shares available to the public.AMPX Ownership.InsiderInstitutionalPublic



Shares Outstanding137.02M
Float124.70M
Float Short Interest Percentage16.15%
Owners (insider)6.32%
Owners (institutional)57.32%
Owners (insider) change0.49%
Owners (institutional) change4.56%
AMPX Institutional Ownership HistoryAMPX Institutional Ownership HistoryAMPX Institutional Ownership History Dec 2022 Mar 2023 Jun 2023 Sep 2023 Dec 2023 Mar 2024 Jun 2024 Sep 2024 Dec 2024 Mar 2025 Jun 2025 Sep 2025 Dec 2025 20M 40M 60M
AMPX Historical Insider Transactions ChartAMPX Historical Insider Buy and Sell Transactions ChartAMPX Historical Insider Transactions Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 Mar 2026 0 1M -1M 2M -2M
DateNameTypeSharesPriceAmount
Mar 23, 2026Sun KangOpen Market Sale21786918.80$ 4,095,401.63
Mar 12, 2026HSIEH Wen HsuanOption Excercise2702512.61$ 705,355.11
Mar 12, 2026HSIEH Wen HsuanOpen Market Sale41314618.44$ 7,620,033.19
Mar 10, 2026Chu StevenOption Excercise2596971.28$ 332,436.71
Mar 10, 2026Chu StevenOpen Market Sale32219718.20$ 5,863,983.95
Mar 4, 2026RODRIGUEZ RICARDO C.Grant1500000.00$ 0.00
Mar 4, 2026Stepien Thomas MGrant1500000.00$ 0.00
Mar 4, 2026Stefan Constantin IonelGrant1100000.00$ 0.00
Feb 23, 2026Sun KangOpen Market Sale6125110.16$ 622,034.53
Feb 23, 2026Stefan Constantin IonelOpen Market Sale2536610.16$ 257,604.41
Jan 28, 2026Stefan Constantin IonelOption Excercise396900.05$ 2,035.80
Jan 28, 2026Stefan Constantin IonelOpen Market Sale3969012.00$ 476,351.44
Jan 21, 2026Stefan Constantin IonelOption Excercise5677070.14$ 81,194.26
Jan 21, 2026Stefan Constantin IonelOpen Market Sale56770712.03$ 6,830,523.48
Jan 16, 2026Sun KangOption Excercise9937332.40$ 2,381,088.10
Jan 16, 2026Sun KangOpen Market Sale99373311.06$ 10,994,943.52
Jan 12, 2026Sun KangOption Excercise5062671.80$ 913,263.90
Jan 12, 2026Sun KangOpen Market Sale50626710.10$ 5,111,474.14
Dec 19, 2025Stepien Thomas MGrant2000000.00$ 0.00
Dec 11, 2025Stefan Constantin IonelOption Excercise1250000.05$ 6,250.00
Dec 11, 2025Stefan Constantin IonelOpen Market Sale19825510.51$ 2,083,382.49
Nov 21, 2025Sun KangOpen Market Sale6865510.08$ 692,131.65
Nov 21, 2025Stefan Constantin IonelOpen Market Sale2502410.08$ 252,274.45
Nov 17, 2025Sun KangOption Excercise10000000.28$ 278,124.74
Nov 17, 2025Sun KangOpen Market Sale100000010.60$ 10,595,300.00
Oct 6, 2025RODRIGUEZ RICARDO C.Grant2000000.00$ 0.00
Aug 21, 2025Stefan Constantin IonelOpen Market Sale191596.82$ 130,591.58
Aug 21, 2025Wallach SandraOpen Market Sale283906.82$ 193,511.92
Aug 21, 2025Sun KangOpen Market Sale656546.82$ 447,510.79
Jun 13, 2025SATTERTHWAITE LIVINGSTONGrant444440.00$ 0.00
Jun 13, 2025BAYLESS KATHLEEN AGrant444440.00$ 0.00
Jun 13, 2025Chu StevenGrant444440.00$ 0.00
Jun 13, 2025DIXON DONALD RGrant444440.00$ 0.00
Jun 13, 2025HSIEH Wen HsuanGrant444440.00$ 0.00
May 21, 2025Stefan Constantin IonelOpen Market Sale203662.43$ 49,530.11
May 21, 2025Wallach SandraOpen Market Sale275952.43$ 67,111.04
May 21, 2025Sun KangOpen Market Sale697862.43$ 169,719.55
May 1, 2025Stepien Thomas MGrant4000000.00$ 0.00