Westlake (WLK) Change in Inventory (2010 - 2026)

Westlake's Change in Inventory history runs 17 years deep, the most recent figure standing at $8.0 million for Q1 2026.

• On a quarterly basis, Change in Inventory fell 89.19% year-over-year to $8.0 million in Q1 2026; TTM through Mar 2026 was -$117.0 million, a 194.35% decrease from a year earlier, with the FY2025 full-year figure at -$51.0 million, down 152.58% from the prior year.
• Change in Inventory advanced to $8.0 million in Q1 2026 per WLK's latest filing, from -$64.0 million in the prior quarter.
• Across five years, Change in Inventory topped out at $163.0 million in Q2 2022 and bottomed at -$198.0 million in Q4 2022.
• The 5-year median for Change in Inventory is $8.0 million (2026), against an average of -$3.3 million.
• Across the five-year window, Change in Inventory jumped 1153.85% in 2022 and plunged 318.52% in 2025, its largest moves.
• Year by year, Change in Inventory stood at -$198.0 million in 2022, then jumped by 71.72% to -$56.0 million in 2023, then jumped by 51.79% to -$27.0 million in 2024, then slumped by 137.04% to -$64.0 million in 2025, then jumped by 112.5% to $8.0 million in 2026.
• Per Business Quant, the three latest WLK Change in Inventory figures stand at $8.0 million (Q1 2026), -$64.0 million (Q4 2025), and -$2.0 million (Q3 2025).