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AMPRIUS TECH (AMPX)
NYSE
$9.95-$0.39 (-3.75%)
Price as of Aug 24, 2026 10:53 AM EDT- $1.5BMarket Cap
- 44.21%1-Year Change
- Electrical Equipment & PartsIndustry
AMPRIUS TECH (AMPX)
$9.95-$0.39 (-3.75%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BLACKROCK, INC. | 8.00% | 11.3M | +2.1M (+18.61%) | Jun 30, 2026 |
VANGUARD GROUP INC | 5.03% | 7.1M | +616,037 (+8.64%) | Dec 31, 2025 |
VANGUARD CAPITAL MANAGEMENT LLC | 3.93% | 5.6M | +654,110 (+11.76%) | Jun 30, 2026 |
MORGAN STANLEY | 3.60% | 5.1M | +1.9M (+38.06%) | Jun 30, 2026 |
JANE STREET GROUP, LLC | 3.26% | 4.6M | +3.5M (+74.77%) | Jun 30, 2026 |
SUSQUEHANNA INTERNATIONAL GROUP, LLP | 3.22% | 4.6M | -595,700 (-13.05%) | Jun 30, 2026 |
TWO SIGMA INVESTMENTS, LP | 3.05% | 4.3M | +812,555 (+18.82%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 3.39% | 4.8M | +99,776 (+2.08%) | Mar 31, 2026 |
CALAMOS INVESTMENT TRUST/IL | 0.84% | 1.2M | +512,074 (+43.23%) | Apr 30, 2026 |
FIDELITY SALEM STREET TRUST | 0.82% | 1.2M | +1.1M (+92.45%) | Apr 30, 2026 |
FIDELITY CONCORD STREET TRUST | 0.79% | 1.1M | +3,232 (+0.29%) | May 31, 2026 |
T. Rowe Price New Horizons Fund, Inc. | 0.79% | 1.1M | +1.1M (+100.00%) | Mar 31, 2026 |
VANGUARD SCOTTSDALE FUNDS | 0.50% | 709,294 | +52,228 (+7.36%) | May 31, 2026 |
SCHWAB STRATEGIC TRUST | 0.50% | 701,709 | -9,288 (-1.32%) | May 31, 2026 |
Current Ownership Distribution
- Institutions444.4M (68.73%)
- Mutual Funds118.7M (18.36%)
- Insiders83.5M (12.91%)
- Other0 (0.00%)
Insider Transactions
- 12.91% (83.5M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 3Number of InsiderSelling (last 12 months)
- $127.0MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
SATTERTHWAITE LIVINGSTON | Award | Jun 12, 2026 | $0.00 | 10,423 | $0.00 | 346,506 |
Chu Steven | Award | Jun 12, 2026 | $0.00 | 10,423 | $0.00 | 137,762 |
Sun Kang | Exempt | Apr 01, 2026 | $2.3M | 1.3M | $1.78 | 0 |
Sun Kang | Exempt | Apr 01, 2026 | $689,981.60 | 187,495 | $3.68 | 1.8M |
Sun Kang | Exempt | Apr 01, 2026 | $2.3M | 1.3M | $1.78 | 2.7M |
Sun Kang | Exempt | Apr 01, 2026 | $689,981.60 | 187,495 | $3.68 | 2.8M |
Sun Kang | Sell | Apr 01, 2026 | $19.7M | 1.3M | $15.73 | 1.6M |
Sun Kang | Sell | Apr 01, 2026 | $4.2M | 249,037 | $16.78 | 1.3M |
Chu Steven | Exempt | Mar 12, 2026 | $224,833.23 | 86,143 | $2.61 | 184,108 |
Chu Steven | Exempt | Mar 12, 2026 | $43,041.64 | 69,422 | $0.62 | 0 |
Chu Steven | Exempt | Mar 12, 2026 | $224,833.23 | 86,143 | $2.61 | 213,482 |
Chu Steven | Exempt | Mar 12, 2026 | $43,041.64 | 69,422 | $0.62 | 282,904 |
Chu Steven | Sell | Mar 12, 2026 | $1.9M | 100,000 | $18.65 | 182,904 |
Chu Steven | Sell | Mar 12, 2026 | $910,740.00 | 50,000 | $18.21 | 132,904 |
Chu Steven | Sell | Mar 12, 2026 | $103,145.05 | 5,565 | $18.53 | 127,339 |
Chu Steven | Exempt | Mar 10, 2026 | $64,561.84 | 104,132 | $0.62 | 293,971 |
Chu Steven | Sell | Mar 10, 2026 | $3.0M | 166,632 | $17.92 | 127,339 |
Chu Steven | Exempt | Mar 10, 2026 | $64,561.84 | 104,132 | $0.62 | 69,422 |
Stefan Constantin Ionel Chief Technology Officer | Award | Mar 04, 2026 | $0.00 | 110,000 | $0.00 | 833,330 |
Stepien Thomas M Chief Executive Officer | Award | Mar 04, 2026 | $0.00 | 150,000 | $0.00 | 760,000 |
RODRIGUEZ RICARDO C. Chief Financial Officer | Award | Mar 04, 2026 | $0.00 | 150,000 | $0.00 | 350,000 |
Sun Kang | Sell | Feb 23, 2026 | $622,034.53 | 61,251 | $10.16 | 1.3M |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 28, 2026 | $0.00 | 90 | $0.00 | 0 |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 28, 2026 | $0.00 | 39,600 | $0.00 | 0 |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 28, 2026 | $55.80 | 90 | $0.62 | 748,786 |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 28, 2026 | $1,980.00 | 39,600 | $0.05 | 788,386 |
Stefan Constantin Ionel Chief Technology Officer | Sell | Jan 28, 2026 | $476,351.44 | 39,690 | $12.00 | 748,696 |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 23, 2026 | $0.00 | 1,600 | $0.00 | 39,600 |
Stefan Constantin Ionel Chief Technology Officer | Exempt | Jan 23, 2026 | $80.00 | 1,600 | $0.05 | 750,296 |
Stefan Constantin Ionel Chief Technology Officer | Sell | Jan 23, 2026 | $19,200.00 | 1,600 | $12.00 | 748,696 |