AMPX offering history
Every offering-related filing in Amprius Technologies, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 501 filings back to Dec 15, 2021.
| Date | Filing | What it means | |
|---|---|---|---|
| Oct 9, 2026 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| May 7, 2026 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Dec 9, 2024 | 424B7 → | UPDATE | Resale prospectus — existing holders registering to sell |
| Oct 23, 2024 | 424B7 → | UPDATE | Resale prospectus — existing holders registering to sell |
| Jul 8, 2024 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jul 8, 2024 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| May 13, 2024 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| May 13, 2024 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Oct 27, 2023 | RW → | WITHDRAWN | Registration withdrawn |
| Oct 27, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Oct 23, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Oct 10, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Oct 10, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Oct 5, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Oct 5, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Oct 3, 2023 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Oct 3, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Aug 11, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Aug 11, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Aug 11, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jul 25, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jul 25, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jul 25, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 27, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 26, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jun 15, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 15, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 15, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 9, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 9, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 9, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| May 12, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| May 12, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| May 12, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| May 10, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
Two honest limits. (1) A 424B takedown can price shares or notes — EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.
AMPX offering FAQ
When did AMPX last execute an offering?
Per SEC filings, Amprius Technologies, Inc.'s most recent priced offering document is a 8-K filed 2026-05-07. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did AMPX last announce or register an offering?
The most recent registration is a S-3ASR filed 2026-10-09. A registration is capacity to sell shares — not a sale.
Does an offering always mean dilution?
Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.
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