$AMPX stock is down 13% today. Here's what we see in our data.

$AMPX stock has now fallen 13% today, according to our price data from Polygon. There has been approximately $116,488,638 of trading volume.

It has been the 109th most-searched ticker on Quiver Quantitative over the last day, out of 12,761 total tickers searched.

Here is what we see in our data on $AMPX (you can track the company live on Quiver's $AMPX stock page):

$AMPX Insider Trading Activity

$AMPX insiders have traded $AMPX stock on the open market 29 times in the past 6 months. Of those trades, 0 have been purchases and 29 have been sales.

Here’s a breakdown of recent trading of $AMPX stock by insiders over the last 6 months:

KANG SUN has made 0 purchases and 10 sales selling 3,347,272 shares for an estimated $45,693,282.
CONSTANTIN IONEL STEFAN (Chief Technology Officer) has made 0 purchases and 7 sales selling 664,783 shares for an estimated $8,045,719.
WEN HSUAN HSIEH has made 0 purchases and 2 sales selling 413,146 shares for an estimated $7,620,033.
STEVEN CHU has made 0 purchases and 4 sales selling 322,197 shares for an estimated $5,863,983.
DONALD R DIXON has made 0 purchases and 3 sales selling 142,895 shares for an estimated $2,544,664.
THOMAS M STEPIEN (Chief Executive Officer) has made 0 purchases and 3 sales selling 67,077 shares for an estimated $1,014,847.

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$AMPX Hedge Fund Activity

We have seen 164 institutional investors add shares of $AMPX stock to their portfolio, and 107 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

JANE STREET GROUP, LLC added 3,947,231 shares (+1849.5%) to their portfolio in Q1 2026, for an estimated $66,550,314
TWO SIGMA INVESTMENTS, LP added 2,069,136 shares (+144.0%) to their portfolio in Q1 2026, for an estimated $34,885,632
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added 2,024,760 shares (+inf%) to their portfolio in Q1 2026, for an estimated $34,137,453
PRICE T ROWE ASSOCIATES INC /MD/ added 1,816,842 shares (+2254.8%) to their portfolio in Q1 2026, for an estimated $30,631,956
SUSQUEHANNA INTERNATIONAL GROUP, LLP removed 1,602,330 shares (-94.7%) from their portfolio in Q1 2026, for an estimated $27,015,283
DRIEHAUS CAPITAL MANAGEMENT LLC added 1,400,966 shares (+58.5%) to their portfolio in Q1 2026, for an estimated $23,620,286
NORGES BANK added 1,304,838 shares (+inf%) to their portfolio in Q4 2025, for an estimated $10,295,171

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

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$AMPX Analyst Ratings

Wall Street analysts have issued reports on $AMPX in the last several months. We have seen 1 firms issue buy ratings on the stock, and 0 firms issue sell ratings.

Here are some recent analyst ratings:

Needham issued a "Buy" rating on 01/29/2026

To track analyst ratings and price targets for $AMPX, check out Quiver Quantitative's $AMPX forecast page.

$AMPX Price Targets

Multiple analysts have issued price targets for $AMPX recently. We have seen 6 analysts offer price targets for $AMPX in the last 6 months, with a median target of $20.5.

Here are some recent targets:

An analyst from Clear Street set a target price of $33.0 on 06/03/2026
Austin Bohlig from Needham set a target price of $20.0 on 03/10/2026
Christopher Souther from B. Riley Securities set a target price of $22.0 on 03/09/2026
Eric Stine from Craig-Hallum set a target price of $21.0 on 03/06/2026
Derek Soderberg from Cantor Fitzgerald set a target price of $20.0 on 03/06/2026
Chip Moore from Roth Capital set a target price of $20.0 on 03/06/2026

You can track data on $AMPX on Quiver Quantitative.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.