The top 10 most significant tech mergers or acquisitions worldwide in 2021 are:

1. Microsoft’s acquisition of Nuance Communications – Microsoft acquired Nuance, a leading provider of speech recognition and artificial intelligence (AI) tools, for $19.7 billion.

2. Amazon’s acquisition of MGM Studios – Amazon acquired MGM Studios for $8.45 billion, expanding its content library and strengthening its position in the streaming market.

3. Square’s acquisition of Afterpay – Square, a digital payments company founded by Jack Dorsey, acquired the Australian buy-now-pay-later platform Afterpay for $29 billion.

4. Salesforce’s acquisition of Slack – Salesforce acquired Slack, a popular workplace communication platform, for $27.7 billion, enabling Salesforce to expand its collaboration and communication offerings.

5. Nvidia’s acquisition of ARM – Nvidia acquired ARM, a British semiconductor and software design company, from SoftBank for $40 billion. This deal is still under scrutiny by regulatory authorities.

6. Verizon’s acquisition of Tracfone – Verizon acquired the prepaid mobile provider Tracfone for $6.25 billion, expanding its reach in the prepaid market and increasing its customer base.

7. Paypal’s acquisition of Curv – Paypal acquired Curv, an Israeli cryptocurrency security firm, to strengthen its capabilities in the digital asset custody space.

8. Twilio’s acquisition of Segment – Twilio, a cloud communications platform, acquired Segment, a customer data platform, for $3.2 billion, enhancing Twilio’s customer engagement and analytics capabilities.

9. Zoom’s acquisition of Five9 – Zoom acquired Five9, a cloud-based contact center software provider, for $14.7 billion, aiming to enhance its communications portfolio and expand into the call center market.

10. Visa’s acquisition of Tink – Visa acquired Tink, a European open banking platform, for $2.2 billion, allowing Visa to offer enhanced financial services and expand its presence in the European market.