U.S. Big Tech's artificial intelligence investments and takeover plans are increasingly drawing regulatory scrutiny worldwide.

Significant merger deals, including Nvidia Corp (NVDA  ) - Arm Holdings Plc (ARM  ) and Intel Corp's (INTC  ) - Tower Semiconductor Ltd (TSEM  ), succumbed to regulatory opposition over anticompetitive grounds.

The European Union's competition watchdog plans to examine Microsoft Corp's (MSFT  ) recent investment in Mistral AI, alongside its ongoing scrutiny of Microsoft's close relationship with OpenAI Inc. Microsoft has formed a strategic partnership with Mistral, investing €15 million ($16.3 million) to make Mistral's artificial intelligence models available on its Azure cloud platform.

Unlike OpenAI's models, which are proprietary, Mistral's are open for sharing.

This investment in Mistral, known for developing algorithmic models for AI services similar to those by OpenAI, will turn into equity in Mistral's next funding round, Bloomberg reports.

While Microsoft has primarily collaborated with OpenAI, investing about $13 billion, its ties with OpenAI and its new investment in Mistral are closely watched by U.K. and EU regulators, raising concerns about potential formal investigations that could impact Microsoft's AI endeavors.

Separately, the U.K.'s Competition and Markets Authority (CMA) has initiated a formal investigation into Qualcomm Inc's (QCOM  ) acquisition of the Israeli semiconductor company Autotalks Ltd for terms undisclosed due to concerns that the deal might restrict competition in the market.

The CMA has set a deadline of April 25 to determine whether to greenlight the acquisition or escalate it to a more detailed investigation, Bloomberg reports.

Qualcomm, headquartered in San Diego, California, announced its intention to acquire Autotalks through its subsidiary, Qualcomm Technologies Inc, aiming to enhance its portfolio in automotive safety systems, specifically in crash-prevention technology.

Additionally, the European Union is examining the takeover, following requests from 15 EU member states, indicating significant regulatory scrutiny over the transaction's potential impact on competition.

Price Actions: Microsoft shares traded lower by 0.55% at $405.32 on the last check Tuesday. QCOM shares traded higher by 0.89% at $158.43.