Warberg Asset Management LLC AMPX/WS — AMPRIUS TECHNOLOGIES INC

Ownership history in Warberg Asset Management LLC  ·  9 quarters on record

AI Ownership Summary

Warberg Asset Management LLC reported AMPRIUS TECHNOLOGIES INC (AMPX/WS) in 9 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.07% in 2026 Q1. The latest visible filing shows AMPX/WS at 0.07% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this AMPX/WS ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Warberg Asset Management LLC's position in AMPRIUS TECHNOLOGIES INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

AMPX/WS was reported at 0.07% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.07% in 2026 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

AMPX/WS stock page Warberg Asset Management LLC fund profile Warberg Asset Management LLC full holdings
How Warberg Asset Management LLC held AMPX/WS — position size vs. price
% of Fund (quarterly)
📋 Quarterly Holdings History 5 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 63,200 +34,200 +117.9% 0.07% $434K 2026-05-07 —
2025 Q3 REDUCED — — — 29,000 -69,000 -70.4% 0.02% $106K 2025-11-06 —
2024 Q4 REDUCED — — — 98,000 -183,481 -65.2% 0.01% $34.8M 2025-02-13 —
2024 Q1 REDUCED — — — 281,481 -90,398 -24.3% 0.01% $70.4M 2024-05-06 —
2023 Q4 REDUCED — — — 371,879 -67,259 -15.3% 0.03% $145.0M 2024-02-07 —
4 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding AMPX/WS

As of 2026 Q1 — sorted by position size

CSS LLC/IL 3Y 7Y 0.25% ARISTEIA CAPITAL, L.L.C. 3Y 7Y 0.17% BOOTHBAY FUND MANAGEMENT, LLC 3Y 7Y 0.1% LMR Partners LLP 3Y 7Y 0.07% Caption Management, LLC 3Y 7Y 0.04% DRW Securities, LLC 3Y 7Y 0.03% Hudson Bay Capital Management LP 3Y 7Y 0.02% WOLVERINE ASSET MANAGEMENT LLC 3Y 7Y 0.01% Janney Montgomery Scott LLC 3Y 7Y 0.0% D. E. Shaw & Co., Inc. 3Y 7Y 0.0%

FAQ About Warberg Asset Management LLC and AMPX/WS

These are the practical questions this page is built to answer before you even open the full history table.

How long has Warberg Asset Management LLC reported owning AMPX/WS?

Warberg Asset Management LLC reported AMPX/WS across 5 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported AMPX/WS position in Warberg Asset Management LLC's portfolio?

The largest reported portfolio weight for AMPX/WS was 0.07% in 2026 Q1.

What is the latest reported AMPX/WS position on this page?

The most recent filing on this page is 2026 Q1, when Warberg Asset Management LLC reported 63,200 shares, equal to 0.07% of portfolio, with an estimated market value of $434K.

What does the chart on this AMPX/WS ownership page compare?

The chart compares Warberg Asset Management LLC's quarterly AMPX/WS portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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