Security key
03214Q108
Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX)
CUSIP: 03214Q108
Q1 2026 13F Holders as of 31 Mar 2026
- Type / Class
- Equity / Common stock, $0.0001 par value
- Shares outstanding
- 137,544,784
- Total 13F shares
- 84,509,434
- Share change
- +17,439,347
- Total reported value
- $1,422,156,057
- Put/Call ratio
- 56%
- Price per share
- $16.86
- Number of holders
- 243
- Value change
- +$346,278,962
- Number of buys
- 166
- Number of sells
- 89
Report period
Q1 2026
Institutions
243
Top holders
10
AMPX full security history
Previous quarter: Q4 2025
Amprius Technologies, Inc. SEC filings
Amprius Technologies, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 03214Q108
Recent filing periods:
Top shareholders 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. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: 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.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
|
Company |
5.8%
|
7,297,002
|
$76,764,461 | $0 | 30 Sep 2025 | |
| Alan E. Salzman |
13D/G
|
SALZMAN ALAN E |
2.6%
|
3,112,992
|
$20,047,668 | $0 | 06 Aug 2025 | |
| Sandra Wallach |
3/4/5
|
Chief Financial Officer |
0.73%
|
1,005,275
|
$6,852,155 | -$193,512 | 21 Aug 2025 | |
| Constantin Ionel Stefan |
3/4/5
|
Chief Technology Officer |
0.61%
|
833,330
|
$9,624,961 | -$10,030,728 | 04 Mar 2026 | |
| Donald R. Dixon |
3/4/5
|
Director |
0.56%
|
771,931
|
$1,945,266 | — | 13 Jun 2025 | |
| Thomas M. Stepien |
3/4/5
|
Chief Executive Officer, Director |
0.55%
|
760,000
|
$8,778,000 | — | 04 Mar 2026 | |
| Ricardo C. Rodriguez |
3/4/5
|
Chief Financial Officer |
0.25%
|
350,000
|
$4,042,500 | — | 04 Mar 2026 | |
| Livingston Satterthwaite |
3/4/5
|
Director |
0.24%
|
336,083
|
$846,929 | — | 13 Jun 2025 | |
| Kathleen A. Bayless |
3/4/5
|
Director |
0.15%
|
205,697
|
$518,356 | — | 13 Jun 2025 | |
| Steven Chu |
3/4/5
|
Director |
0.09%
|
127,339
|
$2,360,177 | -$5,863,984 | 10 Mar 2026 | |
| Wen Hsuan Hsieh |
3/4/5
|
Director |
0.03%
|
44,444
|
$809,911 | -$7,620,033 | 12 Mar 2026 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.2%
|
7,128,657
|
$56,245,105 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
2%
|
2,809,821
|
$22,169,489 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.9%
|
2,678,417
|
$21,136,655 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.9%
|
2,553,710
|
$20,148,772 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
1.7%
|
2,393,212
|
$18,882,443 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.6%
|
2,194,841
|
$17,317,295 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
1.5%
|
2,098,946
|
$16,560,684 | — | 31 Dec 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
1.4%
|
1,955,018
|
$15,425,092 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
1.2%
|
1,691,500
|
$13,345,935 | — | 31 Dec 2025 | |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
1.2%
|
1,602,001
|
$12,639,788 | — | 31 Dec 2025 | |
| Stephens Investment Management Group LLC |
13F
|
Company |
1%
|
1,441,698
|
$11,374,997 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
1%
|
1,436,939
|
$11,337,449 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.95%
|
1,311,915
|
$10,351,010 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.95%
|
1,304,838
|
$10,295,172 | — | 31 Dec 2025 | |
| Hudson Bay Capital Management LP |
13F
|
Company |
0.8%
|
1,100,000
|
$8,679,000 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.79%
|
1,085,270
|
$8,562,780 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.75%
|
1,036,891
|
$8,181,070 | — | 31 Dec 2025 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.72%
|
984,906
|
$7,770,908 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.7%
|
963,171
|
$7,599,419 | — | 31 Dec 2025 | |
| JUPITER ASSET MANAGEMENT LTD |
13F
|
Company |
0.7%
|
960,912
|
$7,581,595 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.64%
|
874,080
|
$6,896,491 | — | 31 Dec 2025 | |
| Hood River Capital Management LLC |
13F
|
Company |
0.59%
|
809,744
|
$6,388,880 | — | 31 Dec 2025 | |
| Baird Financial Group, Inc. |
13F
|
Company |
0.56%
|
773,428
|
$6,102,347 | — | 31 Dec 2025 | |
| STIFEL FINANCIAL CORP |
13F
|
Company |
0.56%
|
771,509
|
$6,087,214 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.51%
|
707,079
|
$5,578,853 | — | 31 Dec 2025 | |
| THAMES CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.38%
|
526,832
|
$4,156,704 | — | 31 Dec 2025 | |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
|
Company |
0.38%
|
516,765
|
$4,077,276 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.36%
|
493,862
|
$3,896,571 | — | 31 Dec 2025 | |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. |
13F
|
Company |
0.36%
|
490,886
|
$3,873,091 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.35%
|
479,500
|
$3,783,255 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.34%
|
469,906
|
$3,707,558 | — | 31 Dec 2025 | |
| Artemis Investment Management LLP |
13F
|
Company |
0.34%
|
464,029
|
$3,661,189 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.33%
|
454,854
|
$3,588,798 | — | 31 Dec 2025 | |
| OSTERWEIS CAPITAL MANAGEMENT INC |
13F
|
Company |
0.33%
|
454,830
|
$3,588,609 | — | 31 Dec 2025 | |
| OPPENHEIMER & CO INC |
13F
|
Company |
0.32%
|
442,090
|
$3,488,090 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.31%
|
431,786
|
$3,406,794 | — | 31 Dec 2025 | |
| Engineers Gate Manager LP |
13F
|
Company |
0.26%
|
360,401
|
$2,843,564 | — | 31 Dec 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.26%
|
359,386
|
$2,835,556 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.23%
|
309,714
|
$2,443,640 | — | 31 Dec 2025 |
Institutional Holders of Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX) as of Q1 2026
As of 31 Mar 2026,
Amprius Technologies, Inc. - Common stock, $0.0001 par value (AMPX) was held by
243 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
84,509,434 shares.
The largest 10 holders included
BlackRock, Inc., VANGUARD CAPITAL MANAGEMENT LLC, JANE STREET GROUP, LLC, Driehaus Capital Management LLC, TWO SIGMA INVESTMENTS, LP, MORGAN STANLEY, GEODE CAPITAL MANAGEMENT, LLC, STATE STREET CORP, UBS Group AG, and GOLDMAN SACHS GROUP INC.
This page lists
243
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
205
Q1 2026 holders
243
Holder diff
38
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.