Security key
03214Q108
Amprius Technologies, Inc. - Common Stock (AMPX)
CUSIP: 03214Q108
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 67,707,437
- Total 13F value
- $534,260,199
- Share change
- +5,469,575
- Put/Call ratio
- 35%
- SEC-reported price per share
- $7.89
- Number of holders
- 205
- Value change
- +$34,169,820
- Number of buys
- 130
- Number of sells
- 82
- Shares outstanding
- 144,605,635
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
205
Top holders
10
AMPX full security history
Ownership snapshot
Full 13F holder table
Amprius Technologies, Inc. SEC filings
Amprius Technologies, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of AMPX - Amprius Technologies, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Alan E. Salzman
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Sep 2025
13D/G
3/4/5
13F
Lead comparable stake: 2.6%
13D/G row: Alan E. Salzman
Showing 1-6 of 15 holder rows.
Quick read
Alan E. Salzman leads the comparable SEC ownership view at 2.6%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Alan E. Salzman's linked filing trail.
Comparable ownership
Top 5
Alan E. Salzman
2.6%
Sandra Wallach
0.7%
BlackRock, Inc.
5.2%
VANGUARD GROUP INC
4.5%
DRIEHAUS CAPITAL MANAGEMENT LLC
2.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Alan E. Salzman |
13D/G
SALZMAN ALAN E
|
2.6%
|
$20,047,668
3,112,992 shares
|
$0 | 06 Aug 2025 |
| Sandra Wallach |
3/4/5
Chief Financial Officer
|
0.7%
|
$6,852,155
1,005,275 shares
|
-$193,512 | 21 Aug 2025 |
| BlackRock, Inc. |
13F
Company
|
5.2%
|
$78,433,995
7,455,703 shares
|
— | 30 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
4.5%
|
$68,512,762
6,512,620 shares
|
— | 30 Sep 2025 |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
Company
|
2.1%
|
$32,513,838
3,090,669 shares
|
— | 30 Sep 2025 |
| MORGAN STANLEY |
13F
Company
|
1.9%
|
$28,863,777
2,743,705 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
205
Shares
67,707,437
Rows available
205
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
186
Q4 2025 holders
205
Holder diff
19
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|