Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in AMPX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 9.2M | $155.5M | +4.5% | 6.514% | 0.00% |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 6.6M | $111.3M | +30.5% | 4.661% | 0.01% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 4.9M | $82.8M | — | 3.466% | 0.00% |
| 4 | CITADEL ADVISORS LLC | 4.2M | $71.1M | +147.1% | 2.977% | 0.03% |
| 5 | DRIEHAUS CAPITAL MANAGEMENT LLC | 3.8M | $64.0M | +58.5% | 2.679% | 0.47% |
| 6 | TWO SIGMA INVESTMENTS, LP | 3.5M | $59.1M | +144.0% | 2.476% | 0.05% |
| 7 | MORGAN STANLEY | 3.2M | $53.3M | +12.5% | 2.233% | 0.00% |
| 8 | UBS Group AG | 2.9M | $49.1M | +38.7% | 2.056% | 0.01% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 2.8M | $47.5M | +5.1% | 1.987% | 0.00% |
| 10 | STATE STREET CORP | 2.7M | $45.7M | +6.2% | 1.915% | 0.00% |
| 11 | GOLDMAN SACHS GROUP INC | 2.2M | $37.5M | +1.4% | 1.572% | 0.00% |
| 12 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.0M | $34.1M | — | 1.430% | 0.01% |
| 13 | Baird Financial Group, Inc. | 1.6M | $26.7M | +104.9% | 1.119% | 0.04% |
| 14 | Point72 Asset Management, L.P. | 1.5M | $24.9M | +24.6% | 1.041% | 0.03% |
| 15 | MARSHALL WACE, LLP | 1.2M | $20.7M | — | 0.867% | 0.02% |
| 16 | Qube Research & Technologies Ltd | 1.2M | $20.7M | +40.4% | 0.867% | 0.02% |
| 17 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.2M | $19.7M | +18.8% | 0.826% | 0.07% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | $18.1M | — | 0.758% | 0.00% |
| 19 | BARCLAYS PLC | 1.1M | $17.8M | -13.5% | 0.745% | 0.01% |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.0M | $17.5M | +0.2% | 0.734% | 0.00% |
| 21 | NORTHERN TRUST CORP | 1.0M | $17.2M | +6.2% | 0.722% | 0.00% |
| 22 | Hood River Capital Management LLC | 949K | $16.0M | +17.2% | 0.670% | 0.16% |
| 23 | Stephens Investment Management Group LLC | 893K | $15.1M | -38.0% | 0.631% | 0.21% |
| 24 | DEUTSCHE BANK AG\ | 875K | $14.8M | -55.2% | 0.618% | 0.00% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 873K | $14.7M | — | 0.616% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in AMPX — a direct measure of their conviction.
Filings activity in AMPX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new AMPX position in Q1 2026
Institutions that fully closed their AMPX position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 238 | +19% | 61.96% | +37.15 pp | $1.43B | +150% |
| Q4 2025 | 200 | +9.9% | 24.81% | 5.59 pp | $573M | 18% |
| Q3 2025 | 182 | +52% | 30.40% | +23.51 pp | $702M | +341% |
| Q2 2025 | 120 | +24% | 6.89% | +4.48 pp | $159M | +185% |
| Q1 2025 | 97 | +10% | 2.41% | +0.41 pp | $56M | +20% |
| Q4 2024 | 88 | +35% | 2.00% | +1.59 pp | $46M | +388% |
| Q3 2024 | 65 | +1.6% | 0.41% | 0.02 pp | $9M | 3.4% |
| Q2 2024 | 64 | — | 0.43% | — | $10M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AMPX stock.
Based on Q1 2026 13F filings, institutional ownership of Amprius Technologies, Inc. stands at 62.0%, held across 238 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of AMPX, with approximately 9,225,611 shares worth $0.16B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of AMPX, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC, TWO SIGMA INVESTMENTS, LP, Point72 Asset Management, L.P..
Our composite Smart Money Score for AMPX is 80 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
79 institutions opened new positions in AMPX during Q1 2026, while 41 fully exited. 143 added to existing positions and 16 trimmed.
AMPX institutional ownership rose by 37.15 percentage points quarter-over-quarter, with a net change of +38 holders.
The top 10 institutions account for 51.7% of all reported 13F value in AMPX, and the top 25 account for 73.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Amprius Technologies, Inc. (AMPX) Institutional Ownership