AMPRIUS TECHNOLOGIES INC (AMPX) Institutional Shareholders
AMPRIUS TECHNOLOGIES INC (AMPX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.34B in AMPX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AMPX tracked by InsiderSet, reporting ownership valued at approximately $157.10M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $108.14M, representing an estimated loss of -31.17% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% of the total disclosed AMPX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Morgan Stanley, and several other long-term asset managers with concentrated positions in AMPRIUS TECHNOLOGIES INC (AMPX).
This page ranks the largest institutional AMPX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
249
Total Reported Value
$1.34B
Largest Holder
Blackrock, Inc.
Largest Position
$157.10M
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
80
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 11,335,092 | $157,104,377 | $108,136,778 | -$48,967,599 | -31.17% | |
| Vanguard Capital Management Llc | 0.00% | 5,562,985 | $77,102,972 | $53,070,877 | -$24,032,095 | -31.17% | |
| Morgan Stanley | 0.00% | 5,105,505 | $70,762,300 | $48,706,518 | -$22,055,782 | -31.17% | |
| Two Sigma Investments, Lp | 0.05% | 4,318,630 | $59,856,212 | $41,199,730 | -$18,656,482 | -31.17% | |
| Ubs Group Ag | 0.01% | 4,072,269 | $56,441,649 | $38,849,446 | -$17,592,203 | -31.17% | |
| Geode Capital Management, Llc | 0.00% | 3,520,655 | $48,805,499 | $33,587,049 | -$15,218,450 | -31.18% | |
| Jane Street Group, Llc | 0.03% | 3,401,071 | $47,138,844 | $32,446,217 | -$14,692,627 | -31.17% | |
| State Street Corp | 0.00% | 3,240,285 | $44,910,350 | $30,912,319 | -$13,998,031 | -31.17% | |
| Goldman Sachs Group Inc | 0.00% | 2,542,294 | $35,236,188 | $24,253,485 | -$10,982,703 | -31.17% | |
| Jupiter Asset Management Ltd | 0.15% | 2,133,397 | $29,568,882 | $20,352,607 | -$9,216,275 | -31.17% | |
| Lmr Partners Llp | 0.18% | 1,750,850 | $24,266,781 | $16,703,109 | -$7,563,672 | -31.17% | |
| Citadel Advisors Llc | 0.01% | 1,676,344 | $23,234,128 | $15,992,322 | -$7,241,806 | -31.17% | |
| Price T Rowe Associates Inc | 0.00% | 1,635,883 | $22,675,000 | $15,606,324 | -$7,068,676 | -31.17% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,457,629 | $20,202,738 | $13,905,781 | -$6,296,957 | -31.17% | |
| Hood River Capital Management Llc | 0.14% | 1,412,516 | $19,577,472 | $13,475,403 | -$6,102,069 | -31.17% | |
| Renaissance Technologies LLC | Jim Simons | 0.03% | 1,408,925 | $19,527,701 | $13,441,144 | -$6,086,557 | -31.17% |
| Driehaus Capital Management Llc | 0.11% | 1,345,269 | $18,645,428 | $12,833,866 | -$5,811,562 | -31.17% | |
| Baird Financial Group, Inc. | 0.03% | 1,324,909 | $18,363,239 | $12,639,632 | -$5,723,607 | -31.17% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.02% | 1,248,700 | $17,306,982 | $11,912,598 | -$5,394,384 | -31.17% | |
| Northern Trust Corp | 0.00% | 1,229,628 | $17,042,644 | $11,730,651 | -$5,311,993 | -31.17% | |
| Millennium Management Llc | 0.01% | 1,208,017 | $16,743,116 | $11,524,482 | -$5,218,634 | -31.17% | |
| Deutsche Bank Ag\ | 0.00% | 1,196,197 | $16,579,290 | $11,411,719 | -$5,167,571 | -31.17% | |
| Barclays Plc | 0.01% | 1,180,878 | $16,366,969 | $11,265,576 | -$5,101,393 | -31.17% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,176,959 | $16,312,652 | $11,228,189 | -$5,084,463 | -31.17% | |
| Point72 Asset Management, L.P. | 0.02% | 1,139,811 | $15,797,780 | $10,873,797 | -$4,923,983 | -31.17% | |
| Qube Research & Technologies Ltd | 0.02% | 1,136,175 | $15,747,386 | $10,839,109 | -$4,908,277 | -31.17% | |
| Susquehanna International Group, Llp | 0.01% | 1,100,269 | $15,249,728 | $10,496,566 | -$4,753,162 | -31.17% | |
| Trexquant Investment Lp | 0.09% | 1,097,532 | $15,211,794 | $10,470,455 | -$4,741,339 | -31.17% | |
| First Trust Advisors Lp | 0.01% | 1,037,344 | $14,377,587 | $9,896,262 | -$4,481,325 | -31.17% | |
| Nearwater Capital Markets, Ltd | 0.25% | 1,034,700 | $14,340,942 | $9,871,038 | -$4,469,904 | -31.17% | |
| Vanguard Fiduciary Trust Co | 0.00% | 989,691 | $13,717,117 | $9,441,652 | -$4,275,465 | -31.17% | |
| Shannon River Fund Management Llc | 1.04% | 838,887 | $11,626,974 | $8,002,982 | -$3,623,992 | -31.17% | |
| Tudor Investment Corp Et Al | 0.04% | 747,428 | $10,359,352 | $7,130,463 | -$3,228,889 | -31.17% | |
| Imc-Chicago, Llc | 0.09% | 734,114 | $10,174,820 | $7,003,448 | -$3,171,372 | -31.17% | |
| Stifel Financial Corp | 0.01% | 731,470 | $10,138,180 | $6,978,224 | -$3,159,956 | -31.17% | |
| Stephens Investment Management Group Llc | 0.11% | 714,324 | $9,900,531 | $6,814,651 | -$3,085,880 | -31.17% | |
| D. E. Shaw & Co., Inc. | 0.01% | 671,812 | $9,311,314 | $6,409,086 | -$2,902,228 | -31.17% | |
| Timessquare Capital Management, Llc | 0.13% | 641,990 | $8,897,981 | $6,124,585 | -$2,773,396 | -31.17% | |
| Oberweis Asset Management Inc/ | 0.18% | 636,200 | $8,817,732 | $6,069,348 | -$2,748,384 | -31.17% | |
| Invesco Ltd. | 0.00% | 571,613 | $7,922,555 | $5,453,188 | -$2,469,367 | -31.17% | |
| Wolf Hill Capital Management, Lp | 0.71% | 527,259 | $7,307,810 | $5,030,051 | -$2,277,759 | -31.17% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.01% | 523,062 | $7,249,639 | $4,990,011 | -$2,259,628 | -31.17% | |
| Massachusetts Financial Services Co | 0.00% | 506,268 | $7,016,874 | $4,829,797 | -$2,187,077 | -31.17% | |
| Oppenheimer & Co Inc | 0.07% | 504,746 | $6,995,780 | $4,815,277 | -$2,180,503 | -31.17% | |
| Dnb Asset Management As | 0.02% | 491,965 | $6,818,635 | $4,693,346 | -$2,125,289 | -31.17% | |
| Polen Capital Management | David M. Polen | 0.06% | 465,598 | $6,453,188 | $4,441,805 | -$2,011,383 | -31.17% |
| Sei Investments Co | 0.01% | 443,230 | $6,143,165 | $4,228,414 | -$1,914,751 | -31.17% | |
| Coppell Advisory Solutions Llc | 0.51% | 500 | $6,138,458 | $4,770 | -$6,133,688 | -99.92% | |
| Federated Hermes, Inc. | 0.01% | 428,693 | $5,941,685 | $4,089,731 | -$1,851,954 | -31.17% | |
| Algert Global Llc | 0.07% | 424,833 | $5,888,185 | $4,052,907 | -$1,835,278 | -31.17% |
Frequently asked questions about AMPX
Who owns the most AMPX stock?
The largest holders of AMPX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for AMPRIUS TECHNOLOGIES INC (AMPX).
Is AMPX widely held by superinvestors?
Many widely followed stocks like AMPX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly AMPX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.