AMPX
Amprius Technologies, Inc.
NYSE · USIndustrialsElectrical Equipment & Parts
$10.06-1.01%
Price as of Jul 20, 2026
AMPX ownership
Amprius Technologies, Inc. ownership & insider activity
Latest available institutional positioning and SEC Form 4 insider transactions, coalesced at the company entity level when listings share coverage.
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
10
Net (3m)
-$5.0M
Insider trades by month Buys Sells
Jan
Feb
Mar
Apr
May
Jun
Context3-month price -48.2%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 16, 2026 | DIXON DONALD Rdirector | Grant | 10,423 | — |
| Jun 16, 2026 | DIXON DONALD Rdirector | Sell | 85,000 | $17.17 |
| Jun 16, 2026 | Chu Stevendirector | Grant | 10,423 | — |
| Jun 16, 2026 | SATTERTHWAITE LIVINGSTONdirector | Grant | 10,423 | — |
| Jun 16, 2026 | BAYLESS KATHLEEN Adirector | Grant | 10,423 | — |
| Jun 11, 2026 | DIXON DONALD Rdirector | Sell | 40,000 | $19.13 |
| Jun 5, 2026 | Stepien Thomas Mdirector, officer: Chief Executive Officer | Sell | 2,000 | $20.97 |
| May 28, 2026 | Sun Kangdirector | Sell | 356 | $17.19 |
| May 28, 2026 | DIXON DONALD Rdirector | Sell | 17,895 | $17.90 |
| May 28, 2026 | Stefan Constantin Ionelofficer: Chief Technology Officer | Sell | 3,208 | $17.19 |
| May 28, 2026 | Stepien Thomas Mdirector, officer: Chief Executive Officer | Sell | 4,375 | $17.19 |
| May 26, 2026 | Stefan Constantin Ionelofficer: Chief Technology Officer | Sell | 28,812 | $14.79 |
| May 26, 2026 | Sun Kangdirector | Sell | 67,796 | $14.79 |
| May 26, 2026 | Stepien Thomas Mdirector, officer: Chief Executive Officer | Sell | 60,702 | $14.79 |
| May 7, 2026 | Sun Kangdirector | Grant | 6,250 | — |
| May 7, 2026 | Stepien Thomas Mdirector, officer: Chief Executive Officer | Grant | 200,000 | — |
| Apr 2, 2026 | Sun Kangdirector | Sell | 249,037 | $16.78 |
| Apr 2, 2026 | Sun Kangdirector | Sell | 1,250,963 | $15.73 |
| Apr 2, 2026 | Sun Kangdirector | Option | 1,312,505 | $1.78 |
| Apr 2, 2026 | Sun Kangdirector | Option | 187,495 | $3.68 |
| Mar 24, 2026 | Sun Kangdirector | Sell | 152,823 | $18.69 |
| Mar 24, 2026 | Sun Kangdirector | Sell | 65,046 | $19.06 |
| Mar 13, 2026 | HSIEH Wen Hsuandirector | Sell | 282,500 | $18.55 |
| Mar 13, 2026 | HSIEH Wen Hsuandirector | Sell | 130,646 | $18.22 |
| Mar 13, 2026 | HSIEH Wen Hsuandirector | Option | 270,251 | $2.61 |
| Mar 12, 2026 | Chu Stevendirector | Sell | 166,632 | $17.92 |
| Mar 12, 2026 | Chu Stevendirector | Option | 69,422 | $0.62 |
| Mar 12, 2026 | Chu Stevendirector | Sell | 100,000 | $18.65 |
| Mar 12, 2026 | Chu Stevendirector | Sell | 50,000 | $18.21 |
| Mar 12, 2026 | Chu Stevendirector | Sell | 5,565 | $18.53 |
Source: AMPX SEC Form 4 filings, latest Jun 16, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their AMPX positions over the last 6 months (SEC Form 13F).
Increased
190
New positions
128
Reduced
115
Sold out
73
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 9.2M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 8.8M | Feb 12, 2026 |
| VANGUARD GROUP INC | Increased | 7.1M | Jan 29, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 6.6M | May 15, 2026 |
| JANE STREET GROUP, LLC | Increased | 6.6M | May 12, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 4.9M | May 15, 2026 |
| CITADEL ADVISORS LLC | Increased | 4.2M | May 15, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | Increased | 3.8M | May 15, 2026 |
| TWO SIGMA INVESTMENTS, LP | Increased | 3.5M | May 15, 2026 |
| MORGAN STANLEY | Reduced | 3.2M | May 15, 2026 |
| UBS GROUP AG | Increased | 2.9M | May 5, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.8M | May 15, 2026 |
| MORGAN STANLEY | Increased | 2.8M | Feb 13, 2026 |
| STATE STREET CORP | Increased | 2.7M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.7M | Feb 9, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.