In Q4'25, Archer Aviation's (ACHR) operating cash flow reached -$129.3M USD, marking the lowest point in the observed period and reflecting intensified cash outflows. Free cash flow for the same quarter stood at -$158.9M USD, similarly hitting a record low amid ongoing operational investments. From Q1'23 to Q4'25, both operating and free cash flows exhibited a consistent downward trend, with operating cash flow deteriorating from -$63.7M USD to -$129.3M USD and free cash flow from -$75.1M USD to -$158.9M USD, indicating escalating negative cash generation likely driven by R&D and expansion in the eVTOL sector. Notable acceleration in declines occurred post-Q2'24, with quarterly drops averaging over 10% in magnitude, underscoring sustained cash burn without signs of stabilization in this bar chart analysis.