AMPX
AMPRIUS TECHNOLOGIES, INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
None.
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Citadel Advisors re-entered | Q3 2024(8Q snapshot) | 7Q | $1.05 | $16 | +1411% |
| Two Sigma Investments | Q3 2024(8Q snapshot) | 7Q | $1.05 | $16 | +1411% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $1.05 | $16 | +1411% |
| Millennium Management re-entered | Q3 2024(8Q snapshot) | 7Q | $1.05 | $16 | +1411% |
| Renaissance Technologies | Q4 2024(8Q snapshot) | 6Q | $2.34 | $16 | +578% |
| D.E. Shaw re-entered | Q1 2025(8Q snapshot) | 5Q | $0.00 | $16 | — |
| Point72 Asset Management | Q4 2025(8Q snapshot) | 2Q | $11 | $16 | +41% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at Amprius Technologies, Inc.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from Jun 5, 2026 — the most recent Form 4 on file — not from today.
- Form 40002067233-26-000015Jun 5, 2026
- Form 40001476220-26-000029May 28, 2026
- Form 40002067233-26-000012May 28, 2026
- Form 40001940928-26-000020May 28, 2026
- Form 40001045434-26-000005May 28, 2026
- Form 40001476220-26-000025May 26, 2026
- Form 40001940928-26-000016May 26, 2026
- Form 40002067233-26-000008May 26, 2026
- Form 4/Aamend0002067233-26-000004May 7, 2026
- Form 40001476220-26-000017May 7, 2026
- Form 40001476220-26-000015Apr 2, 2026
- Form 40001476220-26-000013Mar 24, 2026
- Form 4/Aamend0001920996-26-000004Mar 13, 2026
- Form 40001835160-26-000007Mar 13, 2026
- Form 40001296381-26-000003Mar 12, 2026
Fundamentals
XBRL · AMPRIUS TECHNOLOGIES, INC.Annual figures sourced directly from AMPRIUS TECHNOLOGIES, INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for Amprius Technologies, Inc. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-K/AMaterial event (amended)May 19, 2026
- 8-KMaterial eventMay 7, 2026
- 10-QQuarterly reportMay 7, 2026
- 8-KMaterial eventMay 6, 2026
- DEF 14AProxy statementApr 29, 2026
- 8-KMaterial eventApr 21, 2026
- 10-KAnnual reportMar 6, 2026
- 8-KMaterial eventMar 4, 2026
- 8-KMaterial eventFeb 3, 2026
- 8-KMaterial eventJan 12, 2026
- 8-KMaterial eventDec 22, 2025
- 10-QQuarterly reportNov 6, 2025
- 8-KMaterial eventNov 6, 2025
- 8-KMaterial eventOct 6, 2025
- 8-KMaterial eventSep 2, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| D.E. Shaw | Q2 2026 | open | $17 | $16 | -6% |
| Point72 Asset Management | Q4 2025 | open | $11 | $16 | +41% |
| Citadel Advisors | Q2 2025 | open | $2.73 | $16 | +481% |
| D.E. Shaw | Q1 2025 | open | $0.00 | — | +0% |
| Millennium Management | Q1 2025 | open | $3.39 | $16 | +368% |
| Renaissance Technologies | Q4 2024 | open | $2.34 | $16 | +578% |
| Citadel Advisors | Q3 2024 | Q4 2024 | $1.05 | $2.23 | +112% |
| Two Sigma Investments | Q3 2024 | open | $1.05 | $16 | +1411% |
| AQR Capital Management | Q3 2024 | open | $1.05 | $16 | +1411% |
| Millennium Management | Q3 2024 | Q4 2024 | $1.05 | $2.23 | +112% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.