[3/19 18:00] Samsung HBM4 exclusive supply for OpenAI's first custom "Titan" chip / Samsung-AMD strategic HBM4 partnership for MI455X

AI News Flash for March 19, 2026 at 18:00 UTC. Topics: 1. Samsung HBM4 exclusive supply for OpenAI's first custom "Titan" chip https://www.businessday.co.za/world/international-companies/2026-03-19-samsung-electronics-to-supply-hbm4-chips-for-openais-first-in-house-ai-processor/ 2. Samsung-AMD strategic HBM4 partnership for MI455X https://www.newsbytesapp.com/news/science/samsung-to-supply-amd-s-next-gen-ai-chips-with-hbm4-memory/story 3. Record M&A $813.3B quarter, AI mega-deals https://www.marketscreener.com/news/talk-of-ai-disruption-wars-oil-and-rates-dominates-m-a-conference-even-as-deals-soar-ce7e5edede8ffe24 4. $12.5M open source security pledge by 7 AI companies https://aws.amazon.com/blogs/opensource/aws-and-others-invest-12-5m-to-defend-the-open-source-ecosystem-from-ai-threats/