Latest Period
Q1 2026
Security Snapshot
Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX) Institutional Ownership
CUSIP: 03214Q108
13F Institutional Holders and Ownership History from Q3 2022 to Q1 2026
Institutions Reporting
243
Shares (Excl. Options)
84,509,434
Price
$16.86
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- Type / Class
- Equity / Common stock, $0.0001 par value
- Symbol
- AMPX on NYSE
- Shares outstanding
- 137,544,784
- Price per share
- $17.68
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 84,509,434
- Total reported value
- $1,422,156,057
- % of total 13F portfolios
- 0%
- Share change
- +17,439,347
- Value change
- +$346,278,962
- Number of holders
- 243
- Price from insider filings
- $17.68
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- AMPX - Amprius Technologies, Inc. - Common stock, $0.0001 par value is tracked under CUSIP 03214Q108.
- 243 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 205 to 243 between Q4 2025 and Q1 2026.
- Reported value moved from $534,260,199 to $1,422,156,057.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 243 institutions filings for Q1 2026.
Security key
03214Q108
Latest holder period
Q1 2026
13F holders
243
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
AMPX full holder history
Amprius Technologies, Inc. SEC filings
Amprius Technologies, Inc. company facts
Amprius Technologies, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 03214Q108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
AMPX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 5.8% | $76,764,461 | 7,297,002 | BlackRock, Inc. | 30 Sep 2025 | |||
| JANE STREET GROUP, LLC | 5.1% | $118,269,258 | 7,014,784 | JANE STREET GROUP, LLC | 22 Apr 2026 | |||
| SALZMAN ALAN E | 2.6% | $20,047,668 | 3,112,992 | SALZMAN ALAN E | 06 Aug 2025 |
As of 31 Mar 2026, 243 institutional investors reported holding 84,509,434 shares of Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX). This represents 61% of the company’s total 137,544,784 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
42%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6.7% | 9,225,611 | +4.6% | 0% | $155,543,800 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.6% | 4,908,875 | 0% | 0% | $82,763,633 |
| JANE STREET GROUP, LLC | 3% | 4,160,656 | +1849% | 0.08% | $70,148,660 |
| Driehaus Capital Management LLC | 2.8% | 3,794,178 | +59% | 0.47% | $63,969,841 |
| TWO SIGMA INVESTMENTS, LP | 2.5% | 3,506,075 | +144% | 0.05% | $59,112,425 |
| MORGAN STANLEY | 2.3% | 3,162,167 | +13% | 0% | $53,314,136 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 2,814,530 | +5.1% | 0% | $47,463,273 |
| STATE STREET CORP | 2% | 2,712,630 | +6.2% | 0% | $45,734,942 |
| UBS Group AG | 1.7% | 2,311,554 | +10% | 0.01% | $38,972,800 |
| GOLDMAN SACHS GROUP INC | 1.6% | 2,226,181 | +1.4% | 0% | $37,533,412 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.5% | 2,024,760 | 0.01% | $34,137,454 | |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.4% | 1,897,420 | +2255% | 0% | $31,992,000 |
| Baird Financial Group, Inc. | 1.2% | 1,585,098 | +105% | 0.04% | $26,724,752 |
| CITADEL ADVISORS LLC | 1% | 1,438,660 | +216% | 0.02% | $24,255,808 |
| MARSHALL WACE, LLP | 0.89% | 1,227,599 | 0.02% | $20,697,318 | |
| Qube Research & Technologies Ltd | 0.89% | 1,227,570 | +40% | 0.03% | $20,696,830 |
| JPMORGAN CHASE & CO | 0.88% | 1,216,185 | +1357% | 0% | $17,902,242 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 0.85% | 1,170,131 | +19% | 0.07% | $19,728,409 |
| D. E. Shaw & Co., Inc. | 0.78% | 1,075,386 | 0.01% | $18,131,008 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.78% | 1,073,396 | 0% | 0% | $18,097,457 |
| BARCLAYS PLC | 0.77% | 1,054,927 | +124% | 0.01% | $17,786,068 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.76% | 1,039,394 | +0.24% | 0% | $17,524,183 |
| MILLENNIUM MANAGEMENT LLC | 0.75% | 1,035,238 | -4.6% | 0.01% | $17,454,113 |
| NORTHERN TRUST CORP | 0.74% | 1,022,625 | +6.2% | 0% | $17,241,457 |
| HRT FINANCIAL LP | 0.73% | 1,002,658 | 0.04% | $16,904,000 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
15
Latest
Q1 2026
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 84,509,434 | $1,422,156,057 | +$346,278,962 | $16.86 | 243 |
| 2025 Q4 | 67,707,437 | $534,260,199 | +$34,169,820 | $7.89 | 205 |
| 2025 Q3 | 63,619,076 | $669,377,974 | +$261,382,421 | $10.52 | 186 |
| 2025 Q2 | 38,039,587 | $160,145,831 | +$72,882,798 | $4.21 | 118 |
| 2025 Q1 | 20,792,389 | $55,722,164 | +$11,174,039 | $2.68 | 99 |
| 2024 Q4 | 16,629,172 | $46,565,451 | +$26,312,011 | $2.80 | 89 |
| 2024 Q3 | 8,263,083 | $9,170,989 | +$545,018 | $1.11 | 65 |
| 2024 Q2 | 7,645,780 | $9,709,555 | +$3,389,388 | $1.27 | 64 |
| 2024 Q1 | 4,918,277 | $13,032,986 | +$1,051,870 | $2.65 | 44 |
| 2023 Q4 | 4,444,605 | $23,509,171 | +$1,730,773 | $5.29 | 49 |
| 2023 Q3 | 4,208,635 | $19,949,419 | +$5,319,098 | $4.74 | 46 |
| 2023 Q2 | 2,710,621 | $19,460,082 | +$5,334,118 | $7.18 | 41 |
| 2023 Q1 | 1,947,022 | $16,956,748 | +$807,030 | $8.71 | 25 |
| 2022 Q4 | 1,860,925 | $14,756,175 | +$4,534,753 | $7.93 | 22 |
| 2022 Q3 | 1,273,029 | $11,741,000 | +$11,741,025 | $9.22 | 12 |