The Backlog Is Not Your Friend

The aerospace components market is, by most headline measures, in excellent shape. One widely circulated market-research estimate puts the global A&D components sector at roughly $64 billion in 2025 and $156 billion by 2034—a compounded rate that would make most industrial manufacturers envious, and a figure worth treating as directional rather than precise.¹ The production ramp underneath it is better documented: Boeing moved the 737 line to 47 aircraft a month during the second quarter of 2026, against a stated goal of 63,² and Airbus is targeting 70 to 75 A320-family aircraft a month by the end of 2027.³ The global order backlog has passed 17,000 aircraft—close to 60% of the active fleet, and near twelve years of current production capacity.⁴ On the defense side, Congress appropriated $831.3 billion for the Department of Defense in FY2025 and $839.2 billion in FY2026, NATO allies are committing to higher spending targets, and demand for munitions, unmanned systems, and next-generation propulsion is accelerating across every tier.⁵ The complicating reality: demand written on order books at the OEM level does not translate cleanly into profitable throughput at the Tier 2 and Tier 3 shops actually making the parts.

What owners are navigating right now

The structural mismatch between OEM demand and sub-tier supply capacity is well documented, but the lived experience of the shops caught in the middle deserves a closer read. Owners of highly engineered components businesses—precision machined structures, complex castings and forgings, specialty coatings, NDT-dependent assemblies—are navigating a distinct set of pressures that don’t resolve simply because the headline backlog numbers look good.

• A Pacific Northwest precision machining shop with roughly $18M in revenue and long-term supply agreements with two Tier 1 primes recently found itself simultaneously facing a Nadcap audit renewal, a customer-mandated ERP migration required for portal compliance, and a gap in its aerospace quality engineering bench after a key hire departed. None of these challenges individually would be disqualifying—together, they consumed the owner’s attention for most of a year while throughput stalled at roughly 80% of contract volume.

• A specialty aerostructures fabricator with deep expertise in complex titanium assemblies has been asked by its largest customer (roughly 65% of revenue) to qualify a second source for one of its highest-margin part families—ostensibly a “resilience” initiative driven by OEM supply chain policy. The owner suspects this is a prelude to a managed price reduction. Concentration risk and customer leverage are two sides of the same coin in this segment, and the OEM production ramp doesn’t change that dynamic.

• A defense-facing castings and machining shop producing structural components for rotorcraft programs saw its specialty alloy lead times extend materially as raw material supply remained constrained—an industry-wide condition, with titanium running around nine months and some single-source steel alloys at seventy to eighty weeks.⁶ With cost pass-through limited by fixed-price agreements negotiated before the inflationary period, the shop absorbed significant margin compression for two consecutive years. The owner is now restructuring contract terms on renewals—a negotiation that is easier said than done when the customer is a Tier 1 with structural leverage.

The verticalization question

One of the more interesting dynamics unfolding in aerospace components right now is the verticalization push from OEMs and large primes. Reshoring and supply chain resilience—priorities that were theoretical before COVID and are now structural—have driven a wave of strategic acquisitions targeting Tier 2 and Tier 3 suppliers once considered too small or niche to warrant attention. Apollo’s $3.6 billion acquisition of Barnes Group, completed in January 2025, is the clearest signal that patient, well-capitalized buyers see durable value in this segment.⁷

The open question is what this means for independent operators. OEM verticalization can be a threat (losing a customer to in-house production) or an opportunity (becoming the acquisition target). For highly specialized shops with genuinely defensible process expertise—not just AS9100 certification, but real metallurgical or geometric complexity that competitors cannot easily replicate—the current environment appears to favor sellers. For shops whose primary moat is incumbency and switching cost rather than technical differentiation, the picture is less clear. The compliance stack (AS9100, Nadcap, ITAR where applicable) is genuinely burdensome for smaller operators, but it is also a moat against casual competition that the market currently rewards. Nadcap accreditation is not a regulatory requirement; it is a condition the subscribing primes impose, which is a different and in some ways more durable thing.⁸

What Watershed is watching

Watershed’s interest in aerospace components is rooted in what we find genuinely interesting about technically complex manufacturing: the combination of high certification barriers, process-specific know-how, and long program lifetimes creates a business model that is difficult to disrupt and meaningful to steward. We are particularly drawn to shops with defensible process niches—special processes like thermal spray, precision EDM, or complex multi-axis machined structures—where the intellectual content of the work is embedded in the operators and fixtures as much as in the documentation. The compliance stack is burdensome for smaller shops, but it is also a moat against casual competition that we respect rather than resent.

Questions? Comments? Complaints? Happy to compare notes with others in the trenches. Feel free to reach out anytime to david@watershedholdco.com.