Will MKSI report a sequential decline in chemistry equipment bookings in Q1 or Q2 2026?

The chemistry equipment business nearly doubled in FY2025, creating a very high comparison base. After a near-doubling, some sequential moderation is almost inevitable — sustaining that growth rate is extremely difficult. The question asks about a sequential decline in EITHER Q1 or Q2, which is a compound probability (more likely than a single-quarter question). Lunar New Year seasonality typically weakens Q1, which could create a sequential decline from a strong Q4. However, the backlog through mid-2026 suggests demand remains robust.

Five consecutive strong quarters of bookings, with the business nearly doubling. The AI packaging demand is genuinely structural (layer counts 20→40→80), but the question is about sequential direction, not YoY growth. After such strong growth, even flat bookings would be remarkable. The backlog extends through mid-2026, providing support, but bookings for new orders could soften even as backlog is shipped. Seasonal patterns and the law of large numbers suggest at least one quarter of sequential decline is plausible.

The committee noted that the pace of doubling is unsustainable and normalization to steady growth is expected. A sequential decline doesn't necessarily indicate a trend reversal — it could simply be normalization. The compound nature (Q1 OR Q2) increases the probability. Q1 Lunar New Year seasonality specifically affects chemistry business. On balance, I see about 40% chance because while demand drivers remain strong, the base effect and seasonality create natural sequential softening potential.

This is essentially a coin flip. After a near-doubling in FY2025, some sequential moderation in at least one of two quarters is natural. The question isn't whether demand is weakening (structural AI packaging demand supports continued growth) but whether quarter-to-quarter variation creates a dip. Over two quarters, the probability of at least one sequential decline is meaningful. Lunar New Year Q1 weakness is a specific catalyst.

The backlog extends through mid-2026, which supports robust shipments. But the question is about bookings (new orders), not shipments. If AI packaging demand is building ahead of schedule, customers may have already placed orders (front-loaded bookings) that would create a natural trough. The Thailand and Malaysia capacity investments suggest management sees sustained demand, but capacity ramp-up takes time. I lean slightly below 50% because the structural demand drivers remain intact.

After 5 consecutive strong quarters, a sequential decline in at least one of the next two quarters is statistically likely purely from mean reversion. But the committee's evidence shows the demand drivers are structural (AI layer count progression). The question is whether the structural driver overwhelms the statistical tendency toward normalization. I see this as close to 50/50, leaning slightly below because strong demand drivers resist sequential declines.

Strong backlog and AI demand support continued bookings growth. Sequential decline possible from Lunar New Year seasonality but not the base case. Below 50% given structural demand support.

After near-doubling, some normalization is expected. Two-quarter window makes a sequential decline in at least one quarter more probable. But backlog visibility reduces risk.

Demand drivers are strong but the base effect creates natural sequential headwinds. Below 50% because AI packaging demand continues to strengthen, but sequential decline in one of two quarters is plausible.