Navalyze · Market view · Compare
Compare operators, 2025
Pick a company or group, then the competitors to hold it against, or compare verifiers. Every figure comes from the public THETIS-MRV reports for EU and EEA voyages.
- Siemyour view
Side by side
All 2025 reports of each operator, across every ship type. Change is against 2024 where the operator reported then.
| Siem | |
|---|---|
| Ships | 16 |
| CO₂ emitted | 301 kt |
| Fuel per mile | 111 kg/nm |
| Average speed | 15.1 kn |
| CO₂ at berth | 3.0% |
| Ships burning LNG | 1 |
| Main segment | Ro-ro |
Fuel per mile and speed depend on ship size and type; compare them within a segment below.
Segment by segment
Efficiency only compares within a ship type. Each row gives the CO₂ per transport work of an operator's typical (median) ship, and the bar sets it against the typical ship of the whole segment: to the left of the line it emits less CO₂ for the same transport work, to the right more.
Ro-ro
CO₂ per transport work (cargo) in g CO₂/t·nm · segment median 95.2
- Siem129 (+36% vs median)
- ← bettersegment medianworse →
| Ships | Per work | vs median | Fuel kg/nm | Speed kn | Hours at sea | At berth | LNG | |
|---|---|---|---|---|---|---|---|---|
| Siem | 4 | 129 | +36% | 128 | 15.5 | 6,072 | 2.4% | – |
| Segment median | 95.2 | 0% |
Vehicle carrier
CO₂ per transport work (cargo) in g CO₂/t·nm · segment median 55.4
- Siem59.1 (+7% vs median)
- ← bettersegment medianworse →
| Ships | Per work | vs median | Fuel kg/nm | Speed kn | Hours at sea | At berth | LNG | |
|---|---|---|---|---|---|---|---|---|
| Siem | 3 | 59.1 | +7% | 88 | 13.7 | 3,833 | 2.3% | 1 |
| Segment median | 55.4 | 0% |
Reefer
CO₂ per transport work (cargo) in g CO₂/t·nm · segment median 56.8
- Siem40.9 (−28% vs median)
- ← bettersegment medianworse →
| Ships | Per work | vs median | Fuel kg/nm | Speed kn | Hours at sea | At berth | LNG | |
|---|---|---|---|---|---|---|---|---|
| Siem | 5 | 40.9 | −28% | 93 | 15.5 | 2,383 | 4.9% | – |
| Segment median | 56.8 | 0% |
Verification and monitoring
Who verifies each operator's reports, and which MRV methods its ships use to measure fuel (share of reports).
| Verifiers (ships) | A · delivery notes | B · tank monitoring | C · flow meters | D · direct | |
|---|---|---|---|---|---|
| Siem | DNV (16) | 41% | 12% | 53% | 0% |
Siem: ships furthest from their peers
Each ship's CO₂ per transport work against the median ship of its type and size band. +100% means the ship emits twice as much CO₂ for the same transport work as a typical ship of its size. Ro-pax ships show passenger figures, with freight underneath.
| Ship | IMO | Segment | CO₂ per transport work | Size-band median | vs median | Speed kn | CO₂ | Allowances |
|---|---|---|---|---|---|---|---|---|
| LISTA | 9503627 | Ro-ro | 234 g CO₂/t·nm | 161 | +45% | 15.5 | 45,151 t | €1.8m |
| DUNEDIN STAR | 9038945 | Reefer | 96.9 g CO₂/t·nm | 67.4 | +44% | 14.9 | 4,126 t | €113k |
| STAR PRIMA | 9338747 | Other | 74.0 g CO₂/t·nm | 54.9 | +35% | 15.4 | 18,019 t | €516k |
| LEEVSTEN | 9869954 | Ro-ro | 135 g CO₂/t·nm | 100 | +35% | 16.9 | 34,976 t | €955k |
| LISMORE | 9848467 | Ro-ro | 90.6 g CO₂/t·nm | 76.5 | +19% | 16.8 | 53,930 t | €1.6m |
| STAR FIRST | 9330056 | Other | 54.8 g CO₂/t·nm | 54.9 | 0% | 15.2 | 15,230 t | €405k |
| COTE D'IVOIRIAN STAR | 9172478 | Reefer | 40.9 g CO₂/t·nm | 43.0 | −5% | 15.6 | 13,096 t | €358k |
| SIEM CONFUCIUS | 9841017 | Vehicle carrier | 52.4 g CO₂/t·nm | 55.4 | −5% | 13.2 | 14,040 t | €395k |
| CARIBBEAN STAR | 9150810 | Reefer | 39.7 g CO₂/t·nm | 43.0 | −8% | 15.8 | 12,036 t | €323k |
| COLOMBIAN STAR | 9172480 | Reefer | 41.5 g CO₂/t·nm | 46.5 | −11% | 16.0 | 12,133 t | €325k |
| COSTA RICAN STAR | 9150822 | Reefer | 40.5 g CO₂/t·nm | 46.5 | −13% | 14.7 | 12,216 t | €330k |
| SIEM ARISTOTLELNG | 9841029 | Vehicle carrier | 63.1 g CO₂/t·nm | 76.1 | −17% | 14.6 | 14,324 t | €409k |
| SIEM CICERO | 9762534 | Vehicle carrier | 59.1 g CO₂/t·nm | 76.1 | −22% | 13.3 | 12,790 t | €0 |
| MOSEL ACE | 9177052 | Ro-ro | 123 g CO₂/t·nm | 161 | −23% | 12.0 | 16,463 t | €540k |
30 of 17 reports shown. A high ratio can mean an older or faster-sailing ship, short trades with much time manoeuvring, or part-loaded voyages; it marks where to look first.
Notes
- Companies are ISM companies (Document of Compliance holders) as named in THETIS, usually the ship manager.
- Groups combine ISM companies matched on name and known ownership. If a company is in the wrong group, tell us at info@navalyze.com.
- Efficiency figures use full-year reports with fuel; totals include part-year reports.
- Euro figures use the EUA price set at the top of the page.
- Verifier names vary by entity and year (for example DNV AS and DNV Hellas); they are rolled up into one brand. A verifier's figures cover the ships whose 2025 report it verified.