Howmet's Rally Pushes Valuation Further Above Fundamentals

What happened

Howmet Aerospace has rallied 26.5% year-to-date through September 2026, driven by strong aerospace demand and management's raised 2026 guidance, but the stock now trades at a premium valuation of ~67x P/E and ~43x EV/EBITDA. The rally has extended the stock well above the DeepValue model's base-case implied value of $260 and toward the $300 trim threshold, with the underlying thesis unchanged: sustained aftermarket spares strength and successful integration of the $1.8B CAM acquisition are required to justify the multiple. The latest master report maintains a WAIT rating, citing that the next 6-9 months contain the key swing factors: first post-close CAM segment disclosures, tariff pass-through timing, and any OEM rate disappointments, all of which could reset margins or free cash flow expectations. The new article adds a risk not emphasized in the report: emerging competition from SpaceX in aerospace supply, which could challenge Howmet's content-per-aircraft narrative if SpaceX's vertically integrated approach reduces third-party supplier needs. Given the stock's strong run and insider selling activity (including a large CEO sale in May 2025 and a sizable officer sale in February 2026), the risk/reward to buying at current levels appears skewed to the downside absent confirmation that CAM economics and aftermarket strength persist.

Implication

Investors should resist the urge to buy into the momentum without evidence that the premium multiple is supported by fundamentals. The next two quarterly reports will be critical: they must show that CAM is delivering >20% EBITDA margin and synergies without working capital drag, and that tariff pass-through timing is not compressing margins. If either fails, the stock could re-rate toward the bear case of $190, representing significant downside. Conversely, if CAM integrates smoothly and aftermarket demand remains robust, the bull case of $315 remains viable. Until then, the stock is a hold for existing positions, and new money should wait for better entry points or confirmation of execution.

Thesis delta

The core thesis remains a WAIT, but the new article introduces SpaceX as an additional competitive risk that was not previously highlighted in the DeepValue report. While the report already cites OEM rate risks and CAM integration uncertainty, the SpaceX angle adds a potential long-term threat to Howmet's aerospace content growth, though its near-term impact is unclear. This does not change the rating but adds one more reason to demand a larger margin of safety before buying at rich multiples.