The S&P/ASX 200 Index (ASX: XJO) is on course to start the week with a decline. At the time of writing, the benchmark index is down 0.45% to 8,225.3 points.

Four ASX shares that are not letting that hold them back are listed below. Here's why they are rising:

Brainchip Holdings Ltd (ASX: BRN)

The Brainchip share price is up almost 10% to 40 cents. This is despite there being no news out of the semiconductor company. However, this strong gain is a continuation of a recent uptrend in its share price on the back of no news. In fact, at the end of last week, Brainchip was hit with a speeding ticket because of its gains. The Australian stock exchange operator asked: "Is BRN aware of any information concerning it that has not been announced to the market which, if known by some in the market, could explain the recent trading in its securities?" It simply answered "No". It also gave the same response to the follow up question: "is there any other explanation that BRN may have for the recent trading in its securities?"

Imricor Medical Systems Inc (ASX: IMR)

The Imricor Medical Systems share price is up 9% to $1.28. This morning, this medical device company announced its first order from the Middle East. Imricor's Chair and CEO, Steve Wedan, said: "The Middle East is an exciting market for Imricor where there is a focus on adopting leading healthcare technologies supported by world class physicians. We are looking forward to establishing the first iCMR lab in Qatar and expanding into Saudi Arabia and beyond in 2025." Imricor Medical Systems is a developer of MRI-compatible products for cardiac catheter ablation procedures.

Strike Energy Ltd (ASX: STX)

The Strike Energy share price is up 1% to 20.25 cents. This follows the release of an announcement relating to the logging and evaluation program at the Walyering East-1 exploration well. Management advised that it has been completed with independent petrophysical assessment indicating a potential gas discovery in the Cattamarra Formation. This is subject to retrieving gas samples.

Wildcat Resources Ltd (ASX: WC8)

The Wildcat Resources share price is up 2% to 26.5 cents. This is despite there being no news out of the lithium explorer. However, with its shares down 60% year to date, it seems that some investors believe that a buying opportunity has been created. Wildcat is exploring the Tabba Tabba Lithium Project in Western Australia.