Q4'25 vs Q1'26 — Delta analysis (for critical review)

Purpose: find what weakened, disappeared, or decelerated between Q4'25 (released 2026.01.22) and Q1'26 (released 2026.04.21). Not trying to find explicit negatives; earnings releases don't contain those. Looking for:
- indicators that were highlighted then quietly dropped
- metrics whose framing shifted from stronger to weaker units
- initiatives that promised milestones then went silent
- guidance that remained unchanged despite visibly worsening inputs

1. Headline YoY growth rates

Observation: the growth story is real and broadly accelerating. But two indicators moved the wrong way: total op profit margin compression more than doubled (−90bp → −200bp), and FCF growth very slightly decelerated. These are the Q1 reality that the "beat-and-raise" framing tends to hide.

2. Operational signals — the language shift

The supplier input phrasing is the subtlest and most telling. When a company moves from annual to sequential framing, the annual trend has usually peaked. 40% y/y on a 2024 base is very different from "we grew QoQ in double digits." The latter can coexist with the annual rate cooling to ~15–25%.

3. Initiatives Q4'25 highlighted that Q1'26 did not mention

• "CFM–IATA renewed agreement on open aftermarket for CFM56 and LEAP" — Q4 talking point affirming independent MRO access; Q1 silent. Interpretation: probably resolved, no new news, but worth noting in context of GE's Premier MRO expansion (which runs in the opposite direction — deeper GE control over the MRO chain).
• "Hybrid electric demonstrator ground tests launched" — Q4 highlighted milestone. Q1 says nothing about progress. Avio Aero's AMBER program (EU-funded, hydrogen-fuel-cell hybrid) appears to be the successor program but the connection isn't spelled out and the prior demo's results aren't reported.
• "Global MRO network $1B investment, half-billion specifically for LEAP in Brazil / Malaysia / Dubai / Dallas" — Q4 explicit geographic breakout. Q1 mentions Iberia (Premier MRO #7) and Delta TechOps LEAP-1B expansion, but no progress readout on the Brazil / Malaysia / Dubai / Dallas sites. These were announced in October–December 2025, so at 4–6 months no construction or commissioning milestone has surfaced.
• "Shield AI collaboration to power next-gen autonomous systems with F110" — Q4 highlighted. Q1 silent. The Q1 defense narrative is anchored on GEK1500+Kratos and T408. Two parallel autonomous-systems partnerships may both be alive, but the reader is not told.
• "Hindustan Aeronautics 113 F404 engines" — Q4 announced. Q1 separately announced a 2026.04.13 F404-IN20 India depot contract, but this is a services/footprint extension, not a new-unit announcement. The main HAL 113-unit order's production cadence isn't updated.

4. Geographic rotation of engine wins

• Q4'25 big wins: Dubai Airshow — Riyadh Air 120 LEAP-1A, flydubai 60 GEnx (Middle East-heavy).
• Q1'26 big wins: American 300+ LEAP-1A, United 300 GEnx, Delta 60 GEnx (U.S.-heavy).

This is the one datapoint that is ambiguous in direction. In one reading, GE is benefiting from balanced geographic demand. In a more cautious reading, the Middle East order pipeline has gone quiet as regional airlines pause decisions amid the Hormuz situation, and U.S. carriers happen to be where new demand is landing right now. Either way, a string of Q2–Q3 without Middle East wins would confirm the cautious read.

5. Guidance maintained — but assumptions silently worsened

The most important comparison.

And yet:

The assumptions worsened — materially — and the guidance range did not move down. GE added "trending to high-end" language on top. Two readings:

• Bullish read (GE's frame): the operational momentum and backlog are so strong that an assumption deterioration of this magnitude doesn't dent the 2026 range. The aftermarket cushion absorbs the macro shock.
• Cautious read: a Q1 beat gives room to absorb the worsening macro while keeping the range intact, which means the "high-end trending" is essentially consumed by the first quarter's outperformance, not by incremental improvement from here. If macro keeps deteriorating, the next revision could be a mid-range or low-end trend, then a formal cut.

Both readings are consistent with the data. The bullish read is the one GE is selling. The cautious read is the one a reader who saw the original Q4'25 assumptions has to at least entertain.

6. What is genuinely good (calibrating the critique)

The delta analysis can't be all negatives — then it would be the opposite bias. Things that are genuinely strong and accelerating in Q1 vs Q4:

• LEAP ISV +50%+ is a real acceleration over Q4'25 LEAP shop-visit cadence and a verifiable operational win.
• CES op profit +23% vs Q4'25 +5% — big improvement. Margin compression gets the attention, but absolute profit growth accelerated hugely.
• DPT book-to-bill 2.4× — first time such ratio disclosed at this level. Defense order acceleration is real.
• Spare parts delinquency +70% growing alongside spare parts revenue +25% — this is the single most bullish structural signal. Demand running faster than supply.
• Tariff-related charge reversal ~$100M — genuinely removes an overhang. Not just narrative.

7. The two "no-progress" findings that matter

If I had to pick the two most important critical findings from this delta exercise:

1. Op profit margin compression doubled (−90bp → −200bp) and was explained by the same cause both quarters ("install engine growth including GE9X, investments"). If the cause is the same, the effect widening means either the mix got meaningfully worse or additional unstated pressure (e.g., supply-chain cost). The press release doesn't disambiguate.

2. Guidance was maintained through a visibly worse macro backdrop, which mathematically implies the Q1 operational beat is being consumed by the guidance-preservation. The "trending to high-end" framing is not incremental good news on top of Q4 — it is, essentially, "we are using up our upside to offset the new downside."

These two findings don't undermine the broader story (installed base, aftermarket backlog, geographic diversification all still hold), but they should sit alongside it in the article so the reader doesn't inherit IR framing uncorrected.