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Carbon Sky Index · Model Intelligence Report

G650

Large · 602 aircraft tracked
FI-GULFSTREAMG6
Report Period
Apr — Jul 2026
Active Fleet
521tails
Movements Tracked
10,077
Data Current To
2 Jul 2026
Fleet Signal · Apr — Jul 2026

G650 movements are up 13.8% on the prior period, with activity concentrated in North America (79% of movements). Short-haul share sits at 35% and 26% of movements fall within EU ETS scope — an indicative liability of €2937k for the window.

56/100
Stability Index
FI-GULFSTREAMG6Published 2 Jul 2026
Executive SummaryOne-glance signal panel · current 90 days
Headline

Type standing 6th of 6 — the standout signal this window; other dimensions are steady.

Flight Activity
Rising▲

Fleet movements up 13.8% versus the prior 90 days.

Utilisation
Strengthening▲

Median hours per active airframe up 5.7% period-on-period.

Deployment Stability
Mixed▬

Stability index 56/100 across utilisation spread, corridor regularity and active-set churn.

Efficiency Trend
Improving▲

Efficiency index up 2.2pp on the prior window (5/100).

Regulatory Exposure
Moderate▲

26% of movements ETS-scoped — ~€2937k indicative exposure at €70/t.

Type Standing
6th of 6▬

Ranks 6th of 6 large types on hourly CO₂ intensity (lower is leaner).

Fleet OverviewTrailing period · vs prior 90 days
Active Aircraft
521
distinct tail numbers
▼ −1.1%
Avg Flights / Month
3,359
fleet-wide monthly average
▲ +13.8%
Efficiency Index
5.2/100
% flights under 18 lbs CO₂/nm
▲ +2.2pp
Short-Haul Share
35%
movements under 300 nm
▲ +3.8pp
Median Annual Utilisation
149hrs
per active airframe / year
▲ +5.7%
EU ETS Liability Proxy
106,417t
CO₂ total · this period
▲ +1.0%
Competitive PositionHead-to-head vs comparable types · current 90 days

CO₂ per flight hour vs cohort

Lower is leaner · t/hr
Falcon 2000
2.19
Challenger 300
2.32
Challenger 600
2.35
Citation Longitude
2.38
GIV
4.20
G650
4.39
Cohort

Head-to-head against the 5 most-active large types with at least 60 tracked movements this window (of 27 that qualified).

MetricThis typePeer medianRankReading
CO₂ per flight hour4.39 t/hr2.35 t/hr6th of 6
85th percentile of large types by published CO₂/hr — higher than most
Burns 87% more CO₂ per hour than the peer median (2.35 t/hr) — 6th of 6.
CO₂ per nautical mile10.8 kg/nm6.3 kg/nm5th of 6Per-nm intensity runs 71% above the peer median — a thinner efficiency margin on a distance basis (5th of 6).
Median utilisation149 hrs/yr89 hrs/yr3rd of 6Active airframes fly 67% more hours than the peer median — more intensive deployment (3rd of 6).
Average sector length1,057 nm596 nm1st of 6Sectors run 77% longer than the peer median; longer legs spread climb-phase emissions over more distance (1st of 6).
Activity per tail19.3 mvmts21.0 mvmts4th of 6Each tail logs 8% fewer movements than the peer median (4th of 6).
Short-haul share35 %39 %1st of 611% less short-haul exposure than the peer median — a lighter drag from the segment where CO₂/nm is worst (1st of 6).
Note

Peer values are computed live from each comparable type's tracked flights over the same window. Percentiles, where shown, are against published CO₂/hr for every spec'd type in the category.

Activity & Utilisation TrendApr 2026 — Jul 2026
Mar 25
May 25
Jul 25
Sep 25
Nov 25
Jan 26
Mar 26
Apr 26
May 26
Jun 26
Jul 26
Reading

Fleet movements are up 13.8% period-on-period, with the current window (highlighted) running above the trailing mean. Average sector length is down 8.8% over the same window.

Flight Activity by RegionShare of movements · vs prior 90 days
North America
78.5%▼1.8pp
7,583 mvmts
Europe
12.1%▲0.1pp
1,172 mvmts
Middle East
6.1%▲1.6pp
589 mvmts
Asia Pacific
2.2%▲0.1pp
210 mvmts
Latin America
1.0%
94 mvmts
Africa
0.2%▲0.1pp
15 mvmts
Implication

Regional attribution uses registration jurisdiction. 4.1% of movements had a jurisdiction not mapped to a region and are excluded from this split. A larger European share raises the proportion of movements falling within EU ETS scope.

Registry ConcentrationBy movements
1
United StatesN6–
2,776 movements tracked
27.5%
fleet share
2
United StatesN1–
1,053 movements tracked
10.4%
fleet share
3
United StatesN8–
806 movements tracked
8.0%
fleet share
4
United StatesN7–
598 movements tracked
5.9%
fleet share
5
QatarA7–
579 movements tracked
5.7%
fleet share
Note

Concentration is by registration jurisdiction, inferred from the registration country — not by beneficial operator or owner, which we do not hold.

Tail ConcentrationTop 10 most active
#RegRegistryFlightsShareSignal
1N757RRUnited States1011.00%Low
2N652BAUnited States940.93%Low
3N659FXUnited States760.75%Low
4N555GAUnited States730.72%Low
5N671FXUnited States730.72%Low
6N654FXUnited States710.70%Low
7A7-CGGQatar710.70%Low
8N665FXUnited States700.69%Low
9N670FXUnited States680.67%Low
10N673FXUnited States670.66%Low
Note

Amber dot marks a single tail above 2% of tracked movements — a concentration signal worth noting when reading fleet-level averages.

What Changed90 days vs prior 90 days
Total Fleet Activity
10,077
movements · prior 8,857
▲ +13.8%
Avg Sector Length
1057.0nm
prior 1159.3 nm
▼ −8.8%
Short-Haul Share
35%
prior 31%
▲ +3.8pp
ETS Scoped CO₂
41,952t
prior 30,833 t
▲ +36.1%
Behavioural SignalsWhat changed · why it matters
Corridor activation

A cluster of 6 movements on the San Antonio–Teterboro corridor ran 800% above the trailing 30-day average for that route pair with a directional skew toward Teterboro.

Why it matters

A short, sharp activation on one corridor. Comparable corridor spikes typically revert within two to three weeks, so worth tracking as transient versus sustained activity. The directional imbalance points to a repositioning component that can compress utilisation efficiency on the affected tails.

Corridor activation

A cluster of 6 movements on the Nice/Cote D'Azur–Zurich corridor ran 800% above the trailing 30-day average for that route pair.

Why it matters

A short, sharp activation on one corridor. Comparable corridor spikes typically revert within two to three weeks, so worth tracking as transient versus sustained activity.

Corridor activation

A cluster of 10 movements on the Teterboro–Westhampton Beach corridor ran 650% above the trailing 30-day average for that route pair.

Why it matters

A short, sharp activation on one corridor. Comparable corridor spikes typically revert within two to three weeks, so worth tracking as transient versus sustained activity.

Utilisation divergence

Active airframes fly 67% more hours than the large types median.

Why it matters

More intensive deployment than comparable types — a structural difference in how this fleet is worked, not a one-off.

Stability IndexBehavioural consistency · current 90 days
56/100
Moderate fleet stability

Consistency of operational behaviour across the tracked fleet over the current 90-day window.

Utilisation Consistency50

Flight-hour distribution across 521 active tails has a coefficient of variation of 0.90; the top quartile accounts for 56% of total hours.

Route Regularity37

Corridors recur at a 37% repeat rate (5,881 distinct corridors over 9,351 routed movements); the top 20 carry 6% of movements.

Fleet Composition94

16 tails entered and 22 left the active set vs the prior window — normal churn for this type.

Regulatory Emissions ExposureEU ETS · UK ETS · ReFuelEU
Total CO₂ This Period
106,417t
fleet total · current 90d
▲ +1.0%
EU ETS Scoped Flights
26.2%
2,643 of 10,077 movements
▲ +6.9pp
ETS Scoped CO₂
41,952t
ETS-scope flights only
▲ +36.1%
Estimated ETS Liability
€2937k
41,952 t at €70/t
▲ +36.1%

Highest Emissions Routes

Top 5 by avg CO₂ / flight
RouteMonthly MvmtsAvg CO₂ / FlightETS ScopedExposure
Tokyo → Teterboro252,956 kg—High
Los Angeles → Nice/Cote D'Azur149,438 kg✓High
Hong Kong → Auckland148,565 kg—High
Anchorage → Hong Kong147,955 kg—High
Paris → Los Angeles147,922 kg✓High
Regulatory Context

Business aviation flights operating within or into the EEA fall under the EU Emissions Trading System. For operators with significant European exposure, ETS allowance cost is a direct and growing operating expense.

Risk SignalsApr — Jul 2026
Utilisation DecayLow

Median flight hours per active airframe rose 5.7% versus the prior window. Sustained under-utilisation lowers fleet deployment efficiency and raises the share of fixed operating cost absorbed per flight hour.

Short-Haul ConcentrationElevated

35% of movements are sub-300 nm sectors where the type runs below optimal range — up from 31% a period earlier. Rising short-haul share is the largest single drag on fleet efficiency.

Activity VolatilityElevated

Month-to-month movement counts show a coefficient of variation of 0.27 across the trend window, indicating a lumpier, less predictable deployment profile.

Emissions Regulatory ExposureElevated

EU ETS cost on scoped flights averages roughly €1,111 per movement at €70/t. A material per-flight cost on European-heavy routings.

Operational & Regulatory ImplicationsWhat to do about it · considerations, not advice
01
Emissions / ETS

EU ETS exposure and per-flight intensity

26% of tracked movements fall within EU ETS scope — an indicative €2937k exposure at €70/t this window. SAF blending or routing longer sectors lowers per-flight CO₂ intensity and the associated allowance cost.

02
Operational efficiency

Short-haul concentration is the largest efficiency drag

35% of movements are sub-300 nm sectors, where CO₂/nm is worst. Redeploying marginal short legs to longer sectors is the clearest lever on distance-basis intensity — the metric on which this type ranks against large types.

03
Deployment

Concentration worth monitoring

Activity concentrates in North America (79% of movements), so regional regulatory change would land unevenly on this fleet. Route exposure, by contrast, is diffuse — the top 20 corridors carry just 6% of routed movements, so no single route dominates.

These are operational and regulatory considerations derived from observed flight behaviour and computed emissions — not financial advice, pricing guidance, or transaction recommendations.

Methodology

Fleet movements are derived from ADS-B flight data. Emissions are computed per flight under the EUROCONTROL EMEP/EEA 2023 inventory method on a tank-to-wake basis; this report aggregates those stored values and does not recompute emissions. The efficiency index reflects the share of flights with CO₂ intensity below 18 lbs/nm; short-haul is movements under 300 nm. CO₂ converts from pounds to tonnes (÷ 2,204.62), flight time from seconds to hours (÷ 3,600). Concentration is reported by registration jurisdiction and individual tail. Regional breakdowns are inferred from registration jurisdiction. The competitive benchmark compares this type against the most-active comparable types in the same category, aggregated live over the same window; percentiles, where shown, are against published CO₂/hr for every spec’d type in the category. EU ETS scope follows EEA airport touch; the indicative liability applies a €70/t allowance price. Stability sub-scores derive from flight-hour dispersion, top-20 route-pair concentration and active-set churn. All figures are indicative and subject to ADS-B coverage gaps.

Scope & exclusions

This report describes how the fleet flies — flight activity, computed emissions and aircraft-type specifications. It does not cover, infer or imply asking prices, resale or residual values, value forecasts, time-to-sell, market conditions, maintenance status, ownership identity, or buy/hold/sell guidance. We do not hold that data. Stating the boundary plainly is part of the report’s credibility: every conclusion here is computed from observed flight behaviour and templated from the exact figures, never free-written.

Coverage

602 G650 airframes tracked · 521 active in period · 10,077 movements · 100% with valid CO₂ · 100% with valid duration. Report window Apr 2026 — Jul 2026, vs the prior 90-day comparison period.

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Carbon Sky Index
Modelled on the EUROCONTROL EMEP/EEA 2023 methodology · ICAO-aligned · London · FI-GULFSTREAMG6 · Generated 2 Jul 2026