Sigma AI · Phase 1 Diagnostic
Dixstone Fleet Performance
Internal diagnostic baseline · 5-rig jack-up fleet · West Africa & North SeaRevenue (FY25 LTM)
$142.4M
▲ 8.2% YoY
EBITDA margin
34.2%
−8pp vs peer median 42%
OPEX per rig per day
$68.5k
+18% vs peer median $58k
Fleet utilisation
71%
4 of 5 rigs contracted
Inventory / rig
$8.4M
3.4× peer median $2.5M
NPT (downtime)
13.8%
vs peer ~8%
★ Executive headline
Dixstone is operating $25M of working capital and ~$11M of annual EBITDA below the Tier 1 jack-up peer median — the gap is structural, not cyclical, and concentrated in 4 levers.
Revenue base is healthy (4 of 5 rigs on contract with Perenco group). The performance gap sits in cost structure (OPEX/day 18% above peers), inventory bloat ($42M total, $25M release opportunity), vendor concentration (top 3 suppliers = 47% of spend with single-source exposure on critical BOP spares), and one chronically idle rig (Sentinel — warm-stacked since FY24 Q2, no contract pipeline).
FINDINGS
The five things the GM needs to know
FINDING 01
Inventory is the single biggest cash trap
$42.0M total inventory; $8.4M/rig vs peer median $2.5M/rig. 34% of stock has not moved in 24+ months. Releasable working capital: ~$25M.
FINDING 02
Vendor concentration = supply-chain risk
Top 3 suppliers represent 47% of FY25 spend. Single-source exposure on BOP parts (NOV), drilling fluids (M-I SWACO) and OCTG (Tenaris). One supplier disruption = fleet at risk.
FINDING 03
Emergency procurement premium
$4.2M spent YTD on expedited POs — ~10× normal price on the same SKUs. Root cause: weak MRP discipline + missing min/max levels at offshore warehouses.
FINDING 04
NPT drag costs ~25 rig-days / year / rig
Fleet NPT averaging 13.8% vs peer median 8%. Top NPT category: equipment failure (52% of total NPT hours). At average day rate $115k, this = ~$14M/year lost revenue.
FINDING 05
Dixstone Sentinel — fleet rationalisation candidate
Warm-stacked since FY24 Q2 (~14 months). Burning $35k/day preservation cost ($12.8M/year). No customer pipeline. Decision required: reactivate, sell, or scrap.
Revenue & EBITDA — last 12 months
Monthly, USD M · Revenue (bar) vs EBITDA (line)
Where the value is leaking
EBITDA gap vs peer median, USD M / year
Active rigs
4 / 5
Sentinel warm-stacked
Weighted avg day rate
$115k/day
Fleet utilisation
71%
excl. Sentinel: 89%
Avg NPT
13.8%
REVEFF (Revenue Efficiency)
94.1%
peer 96–97%
FTE (total)
491
112 / rig active
⚠ Operational risk
Equipment-failure NPT is the dominant cost driver — $14M/year in lost revenue.
52% of fleet NPT hours come from top-drive, mud-pump and BOP failures. This is a reliability problem, not a crew problem — and it links directly to deferred maintenance + critical-spares stockouts (see Inventory).
Fleet roster · FY25 LTM
Per-rig snapshot| Rig | Built | Location | Customer | Day rate | OPEX/day | Utilisation | NPT | FTE | Status |
|---|
NPT breakdown — what's causing the downtime
% of total NPT hours, FY25 LTM
Per-rig revenue efficiency vs target (96%)
Actual revenue / contracted revenue
Annual procurement spend
$87.3M
Top-3 vendor concentration
47%
single-source on critical BOP / OCTG
Supplier OTIF (on time & in full)
73%
industry benchmark 90%+
Avg procurement cycle
47 days
target 28 days
Emergency POs (YTD)
$4.2M
~10× standard pricing
Active suppliers
218
tail of 142 = <0.5% spend each
⚠ Top supply-chain risk
Single-source exposure on three critical categories. A 30-day disruption from any one would idle 1–2 rigs.
BOP & control system spares — NOV (sole-sourced). Drilling fluids & mud chemicals — M-I SWACO (sole-sourced). Premium OCTG & tubulars — Tenaris (sole-sourced). Combined exposure: $41M of annual spend with no qualified alternate. Recommended action: dual-source these three categories within 6 months.
Spend by category
FY25 LTM, USD M
Vendor concentration (top 10)
Pareto · % of total spend
Top 10 suppliers · risk-adjusted
FY25 LTM spend + OTIF + sourcing status| Supplier | Category | FY25 spend | % of total | OTIF | Sourcing | Risk |
|---|
Emergency POs by month
Expedited spend, USD k · target: 0
Procurement cycle by category
PO raised → goods received, days
Total inventory value
$42.0M
$8.4M / rig vs $2.5M peer
Dead stock (24m+ no movement)
$14.3M
34% of total
Slow-moving (12-24m)
$8.7M
21%
Inventory turns
0.8×
peer 2.4×
Days inventory held
456
target <150
Critical-spares coverage
62%
target 95%+
★ Working-capital opportunity
The paradox: $23M of dead and slow stock alongside 38% critical-spares stockouts. The MRP / stocking policy is mismatched to the actual operational pattern.
Dixstone holds too much of what doesn't move and too little of what does. Root cause: no formal min/max system, no SKU-criticality classification, and inventory positioned offshore not centrally. A 6-month working-capital programme would release ~$25M cash while simultaneously closing the critical-spares gap.
Inventory $ per rig — by warehouse / asset
USD M · with $2.5M peer median benchmark line
Inventory aging distribution
USD M by last-movement bucket
Inventory profile · per rig / warehouse
Latest snapshot · FY25 month-end| Location | Total $M | Dead $M | % dead | Critical SKU coverage | Stockouts (YTD) | Status |
|---|
Critical spares — coverage vs stockouts
% of critical SKUs with min/max-compliant stock vs YTD stockout incidents
Working-capital release path
USD M · 12-month inventory normalisation
Total OPEX (FY25 LTM)
$93.7M
OPEX per rig per day
$68.5k
+18% vs peer median $58k
Personnel cost % of OPEX
52%
vs peer 48%
Maintenance % of OPEX
24%
elevated — see Reliability
Logistics premium (expedites)
$4.2M
FY25 budget variance
+7.3%
over budget
★ OPEX gap diagnosis
The 18% OPEX gap vs peer median is ~$10.5k/rig/day = ~$15M/year fleet-wide. Three drivers explain 85% of it.
(1) Personnel cost ~$2.4k/day premium — higher local-vs-expat blended rate + over-staffing on Ranger (124 FTE vs fleet avg 112). (2) Maintenance & spares ~$3.5k/day premium — driven by reactive repairs + emergency procurement. (3) Logistics ~$1.8k/day premium — expedites, multi-stop offshore supply runs, no warehouse consolidation across WAF.
OPEX breakdown by category
FY25 LTM, USD M and % of total
OPEX per rig per day · Dixstone vs peers
USD k/day, latest FY
OPEX per rig · FY25 LTM
USD M and $/day| Rig | Personnel | Maint & spares | Logistics | Catering & crew change | Other | Total $M | $/day |
|---|
FY25 variance to budget — by category
Budget vs actual, USD M · over (red) / under (green)
CAPEX (FY25 LTM)
$31.8M
CAPEX % of revenue
22.3%
peer 25–40%
Maintenance CAPEX
$18.9M
59% of total
SPS cycle cost / rig
$32M
Ranger SPS due FY26
Sentinel preservation
$12.8M/yr
no contract pipeline
Deferred maintenance backlog
$8.7M
★ Capital allocation lens
CAPEX is underspent on reliability and overspent on preserving a non-earning asset.
$8.7M of maintenance work has been deferred — the same reliability gap that drives the NPT cost in Operations. Meanwhile, $12.8M/year is being spent preserving Sentinel with no contract pipeline. A fleet-rationalisation decision on Sentinel + reallocating that capex into reliability programmes would deliver ~$20M of EBITDA improvement over 18 months.
CAPEX mix · Maintenance / SPS / Growth
FY23–FY25, USD M
SPS calendar · next 36 months
USD M outflow + days off-hire per rig
Major capex projects · FY25
Status, budget vs actual, business case| Project | Rig | Budget | Actual / committed | Variance | Status | Business case |
|---|
★ Strategic prescription
Eight prioritised actions. Combined potential: ~$30M working-capital release + ~$25M annual EBITDA improvement within 18 months.
Tagged by horizon: Quick Win (under 3 months, low risk) · Structural (3–12 months, medium risk) · Strategic (12+ months, transformational).
VALUE WATERFALL
From baseline to target
EBITDA bridge · FY25 actual → FY27 target
USD M · cumulative impact of recommended actions