AMPRIUS TECHNOLOGIES INC (AMPX) Institutional Ownership Changes & 13F Activity
AMPRIUS TECHNOLOGIES INC (AMPX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Driehaus Capital Management Llc, Lmr Partners Llp, Point72 Asset Management, L.P., Nearwater Capital Markets, Ltd, and Susquehanna International Group, Llp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| State Street Corp | Buy | +527,655 | +19.5% | 3,240,285 | $44.91M | Q2 2026 | Sep 22, 2026 |
| Manufacturers Life Insurance Company, The | Buy | +10,937 | +18.6% | 69,727 | $966.42K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Buy | +237,684 | +16.5% | 1,676,344 | $23.23M | Q2 2026 | Sep 02, 2026 |
| Corient Private Wealth Llc | Buy | +3,574 | +22.3% | 19,573 | $271.28K | Q2 2026 | Aug 27, 2026 |
| California State Teachers Retirement System | Sell | -18,639 | -11.7% | 141,264 | $1.96M | Q2 2026 | Aug 24, 2026 |
| Cantor Fitzgerald, L. P. | Buy | +147,909 | — | 147,909 | $2.05M | Q2 2026 | Aug 19, 2026 |
| Mercer Global Advisors Inc | Buy | +18,889 | — | 18,889 | $261.80K | Q2 2026 | Aug 19, 2026 |
| Capstone Investment Advisors, Llc | Buy | +32,390 | — | 32,390 | $448.93K | Q2 2026 | Aug 17, 2026 |
| Driehaus Capital Management Llc | Sell | -2,448,909 | -64.5% | 1,345,269 | $18.65M | Q2 2026 | Aug 14, 2026 |
| Lmr Partners Llp | Buy | +1,750,850 | — | 1,750,850 | $24.27M | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | Buy | +1,111,890 | +3982.3% | 1,139,811 | $15.80M | Q2 2026 | Aug 14, 2026 |
| Nearwater Capital Markets, Ltd | Buy | +1,034,700 | — | 1,034,700 | $14.34M | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Buy | +1,011,099 | +1133.9% | 1,100,269 | $15.25M | Q2 2026 | Aug 14, 2026 |
| Two Sigma Investments, Lp | Buy | +812,555 | +23.2% | 4,318,630 | $59.86M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Sell | -759,585 | -18.3% | 3,401,071 | $47.14M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +571,613 | — | 571,613 | $7.92M | Q2 2026 | Aug 14, 2026 |
| Hood River Capital Management Llc | Buy | +463,369 | +48.8% | 1,412,516 | $19.58M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Sell | -403,574 | -37.5% | 671,812 | $9.31M | Q2 2026 | Aug 14, 2026 |
| Trexquant Investment Lp | Buy | +381,275 | +53.2% | 1,097,532 | $15.21M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Buy | +342,797 | — | 342,797 | $4.75M | Q2 2026 | Aug 14, 2026 |
| Tudor Investment Corp Et Al | Buy | +327,767 | +78.1% | 747,428 | $10.36M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +316,113 | +14.2% | 2,542,294 | $35.24M | Q2 2026 | Aug 14, 2026 |
| Credit Agricole S A | Buy | +265,189 | — | 265,189 | $3.68M | Q2 2026 | Aug 14, 2026 |
| Price T Rowe Associates Inc | Sell | -261,537 | -13.8% | 1,635,883 | $22.68M | Q2 2026 | Aug 14, 2026 |
| Hsbc Holdings Plc | Buy | +259,508 | — | 259,508 | $3.62M | Q2 2026 | Aug 14, 2026 |
| Group One Trading Llc | Buy | +213,312 | — | 213,312 | $2.96M | Q2 2026 | Aug 14, 2026 |
| Exoduspoint Capital Management, Lp | Buy | +179,272 | — | 179,272 | $2.48M | Q2 2026 | Aug 14, 2026 |
| Sender Co & Partners, Inc. | Buy | +176,449 | +98.4% | 355,692 | $4.93M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +172,779 | +16.7% | 1,208,017 | $16.74M | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -162,898 | -70.2% | 69,211 | $959.26K | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about AMPX activity
Which institutional owners are buying AMPX?
Institutional owners buying AMPX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in AMPX activity?
"Buy" means an investor increased their reported position in AMPX compared to the prior reporting period. This reflects growing exposure to AMPRIUS TECHNOLOGIES INC (AMPX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in AMPX increasing?
Institutional interest in AMPX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related AMPX Institutional Insights
- AMPX Overview
- AMPX 13F Institutional Holders
- AMPX Top Institutional Shareholders
- Industrials Sector Institutional Ownership
- Industrials Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Industrials Stocks By Institutional Investors
- Most Sold Industrials Stocks By Institutional Investors
- AMPX Insider Trading & SEC Form 4 Activity
- AMPX Articles
- Top Institutional Investor Stock Rankings