Companies / Amprius Technologies, Inc.
Amprius Technologies, Inc.
NYSE: AMPXCIK 1899287FREMONT, CA
Insider flow · last 90 daysNet sells $2.54M
Financials · FY2025
Ownership
146.1M shares outstanding · as of Jul 31, 2026
Ownership
| Insiders | 2.21% | 3,222,068 |
| Institutions | 51.82% | 75,700,480 |
| Public float | 45.97% | 67,158,070 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 8
View all →| Insider | % of shares | Shares |
|---|---|---|
Sun KangDirector | 0.96% | 1,398,806 |
Stefan Constantin IonelFormerChief Technology Officer | 0.57% | 833,330 |
Stepien Thomas MCEOChief Executive Officer · Director | 0.52% | 760,000 |
Dixon Donald RDirector | 0.25% | 359,380 |
Rodriguez Ricardo C.Chief Financial Officer | 0.24% | 350,000 |
Bayless Kathleen aDirector | 0.15% | 216,120 |
Chu StevenDirector | 0.09% | 137,762 |
HSIEH Wen HsuanFormerDirector | 0.03% | 44,444 |
Institutional holders 218
View all →| Holder | Value | % of shares |
|---|---|---|
| $157.10M | 7.76% | |
| $59.11M | 2.40% | |
| $56.25M | 4.88% | |
| $47.46M | 1.93% | |
| $44.91M | 2.22% | |
| $22.17M | 1.92% | |
| $20.70M | 0.84% | |
| $18.88M | 1.64% | |
| $18.13M | 0.74% | |
| $17.45M | 0.71% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Add | Common stock | $34.89M | +2.1M +144.00% | 3,506,075 2.40% of shares | medium |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $34.81M | +2.5M +28.46% | 11,335,092 7.76% of shares | medium |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | New | Common stock | $20.70M | +1.2M | 1,227,599 0.84% of shares | medium |
| Q1 2026 as of | D. E. Shaw & Co., Inc. 13F manager | New | Common stock | $18.13M | +1.1M | 1,075,386 0.74% of shares | medium |
| Q2 2026 as of | Deutsche Bank AG 13F manager | Trim | Common stock | $-10.52M | -759K -38.81% | 1,196,197 0.82% of shares | medium |
| Q4 2025 as of | Norges Bank 13F manager | New | Common stock | $10.30M | +1.3M | 1,304,838 0.89% of shares | medium |
| Q1 2026 as of | Norges Bank 13F manager | Exit | Common stock | $-10.30M | -1.3M -100.00% | 0 | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common stock | $9.52M | +687K +26.89% | 3,240,285 2.22% of shares | medium |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| AMPX | — | 03214Q108 |