The compatibilizer additives market is projected to grow from USD 2.3 billion in 2026 to USD 4.5 billion by 2036, at a CAGR of 7.0%. Maleic-Anhydride Grafted Polyolefins will dominate with a 46.0% market share, while polyolefin blends & alloys will lead the application segment with a 34.0% share.