Why Westlake stock is jumping today after its ACI deal filing
NEW YORK, Jan 8, 2026, 13:30 EST — Regular session Westlake Corp (WLK) shares jumped 7.4% in early afternoon trading on Thursday, extending a sharp intraday rebound after the chemical maker disclosed it had completed an acquisition in its compounds business. The stock was up $5.51 at $79.98, after ending Wednesday at $74.47. The purchase matters now because Westlake is leaning harder into specialty compounds — plastics tailored for specific uses — as investors look for steadier earnings in a sector that can swing with construction demand and commodity chemical pricing. Compounding is the work of blending a base polymer