Security key
03214Q108
Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX)
CUSIP: 03214Q108
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common stock, $0.0001 par value
- Total 13F shares
- 20,792,389
- Total 13F value
- $55,722,164
- Share change
- +4,210,781
- Put/Call ratio
- 23%
- SEC-reported price per share
- $2.68
- Number of holders
- 99
- Value change
- +$11,174,039
- Number of buys
- 63
- Number of sells
- 34
- Shares outstanding
- 142,842,515
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
Q1 2025
Institutions
99
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, $0.0001 par value (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
Amprius, Inc.
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
0/15
Latest evidence
31 Dec 2024
3/4/5
13F
Highest disclosed value: $11,700,072
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC has the largest disclosed position value at $11.7M.
0 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 VANGUARD GROUP INC's linked filing trail.
Disclosed position value
Top 5
Amprius, Inc.
$2.01M
VANGUARD GROUP INC
$11.7M
Invesco Ltd.
$6.96M
Board of Trustees of The Leland S...
$4.08M
STIFEL FINANCIAL CORP
$2.51M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Amprius, Inc. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$2,012,807
2,500,071 shares
|
— | 23 Oct 2024 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$11,700,072
4,178,597 shares
|
— | 31 Dec 2024 |
| Invesco Ltd. |
13F
Company
|
—
denominator unverified
|
$6,957,053
2,484,662 shares
|
— | 31 Dec 2024 |
| Board of Trustees of The Leland Stanford Junior University |
13F
Company
|
—
denominator unverified
|
$4,081,160
1,457,557 shares
|
— | 31 Dec 2024 |
| STIFEL FINANCIAL CORP |
13F
Company
|
—
denominator unverified
|
$2,508,126
895,760 shares
|
— | 31 Dec 2024 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
denominator unverified
|
$2,142,280
765,100 shares
|
— | 31 Dec 2024 |
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 Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
99
Shares
20,792,389
Rows available
99
| 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 Q1 2025 vs Q1 2025 Across Filers
Q1 2025 holders
99
Q1 2025 holders
99
Holder diff
0
| Investor | Q1 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|