Sirena sells its first steel 42m before its Monaco debut
A spec-built 42m sold before its Monaco premiere
Sirena Marine has sold the first hull of the Sirena Superyachts 42M ahead of the model's world premiere at the Monaco Yacht Show, which runs from 23 to 26 September 2026. The 42.2m yacht is the largest the Turkish builder has produced and its first with a steel hull and aluminium superstructure. It measures about 433 GT and accommodates 10 guests in five staterooms, with exterior lines by Luca Vallebona, interiors by Hot Lab and naval architecture by Van Oossanen, which fitted the hull with its Fast Displacement Hull Form and a Hull Vane foil.
Construction began on spec in 2024 at the builder's Yalova yard near Istanbul, and the boat found an owner while still under construction. The model is listed at 23.95m euros with Northrop and Johnson as central agent. Sirena described the deal as an in-house sale to an experienced owner. Its chief commercial officer, Ali Onger, said the sale confirmed that 'our approach to building modern, highly capable superyachts resonates with experienced owners.'
A sub-40m production yard steps up in size
Sirena built its name on sub-40m production and semi-custom motor yachts, a range that tops out around 27 metres. The 42M is its first move above 40 metres and its first steel build. To make room, the company has leased waterside halls at Yalova, adding roughly 150,000 square metres of space and lifting its workforce toward 1,200 people, with the larger yacht concentrated there.
Selling the debut hull before any public showing removes the financial exposure a spec build normally carries and books the yard's first slot at the top of its range. In a segment where buyers have turned patient, late-model turnkey tonnage in the 30 to 45m band still commands the firmest prices. A hull that can deliver soon, from a builder with an existing owner base, is the profile buyers have been paying up for.
Turkey's yards keep climbing the size ladder
The sale lands as Turkey holds a place among the top building nations in BOAT International's Global Order Book, behind Italy and the Netherlands on most measures, even after national order intake cooled from its 2024 peak. Turkish yards have long led the sub-40m and explorer niches on price and build quality. Steel superyachts above 40 metres put them into more direct competition with established Italian and northern European houses.
For an owner, the value line is the point. A steel 42m that pairs Dutch naval architecture and Italian styling with a sub-40m production builder's cost base sits apart from a comparable Italian or Dutch new build, and the first hull is already committed. What Monaco will test is whether the second and third slots move as quickly, and whether the rest of a fleet still rooted below 40 metres follows the flagship upward.
What owners and crew report
Sirena's own commercial leadership frames the sale as proof the yard can hold buyers at a larger size
"Our approach to building modern, highly capable superyachts resonates with experienced owners."
Ali Onger, Chief Commercial Officer, Sirena Marine
What is good, and what to watch
Strong points
- Sold before the model had even been shown publiclyFinding a buyer for the first hull ahead of its Monaco Yacht Show premiere removes the spec-build risk the yard carried and proves demand exists sight-unseen, on the strength of the naval architecture and the builder's track record alone.
- A genuine step up in engineering, not just sizeVan Oossanen's Fast Displacement Hull Form and Hull Vane foil are proven, named technologies rather than an unverified claim, and the steel hull with aluminium superstructure is a real construction change from Sirena's aluminium production range.
- Priced below comparable Italian or Dutch steel 42m new buildsAt EUR 23.95m for a steel-hulled, Van Oossanen-engineered 42m with recognised Italian design input, the price sits below what a comparable yacht from an established Italian or northern European steel yard typically commands.
What to watch
- No sea trial or performance data exists yetAs a spec-built first hull sold before completion, there is no published speed, range or fuel-burn figure to check the naval architecture's real-world performance against Van Oossanen's design targets.
- First hull from a yard with no steel-superyacht track recordSirena's production history tops out around 27 m in aluminium; this 42m steel flagship is a first-of-type build for the yard, carrying the usual first-hull risk that an established steel-superyacht builder does not.
- Whether the range holds above 40m is still unprovenOne sold hull answers demand for a single boat, not whether Sirena can sustain a slot at the top of its range; the article itself notes that the second and third hulls have not yet been confirmed to move as quickly.
Practical detail
| Price | EUR 23.95 million, listed with Northrop & Johnson as central agent |
|---|---|
| Size / volume | 42.2 m LOA, about 433 GT |
| Accommodation | 10 guests in five staterooms |
| Naval architecture | Van Oossanen, with a Fast Displacement Hull Form and a Hull Vane foil |
| Design | Exterior by Luca Vallebona, interior by Hot Lab |
| What is not published | No sea trial or performance figures (speed, range, fuel burn) have been released for this hull; construction began on spec in 2024 with no prior test data to compare it against |
Questions this story answers
What happened?
Sirena Marine has sold the first hull of its 42M, the largest yacht and first steel build in the Turkish yard's history, before the model reaches its Monaco Yacht Show premiere in September. The 42.2m boat was laid down on spec in 2024 and found an owner while still under construction, listed at 23.95m euros with Northrop and Johnson. For buyers it is a signal that a yard known for sub-40m production yachts can now hold a slot at the top of its range.
What is good about it?
Sold before the model had even been shown publicly. Finding a buyer for the first hull ahead of its Monaco Yacht Show premiere removes the spec-build risk the yard carried and proves demand exists sight-unseen, on the strength of the naval architecture and the builder's track record alone.
What should an owner or buyer watch?
No sea trial or performance data exists yet. As a spec-built first hull sold before completion, there is no published speed, range or fuel-burn figure to check the naval architecture's real-world performance against Van Oossanen's design targets.
What do owners and crew report?
"Our approach to building modern, highly capable superyachts resonates with experienced owners." (Ali Onger, Chief Commercial Officer, Sirena Marine)
Who reported this?
SuperYacht Times, Megayacht News, YachtBuyer, BOAT International, Northrop & Johnson.
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