REV Ocean, although not strictly considered a superyacht, has been developed with legendary superyacht designer Espen Øino and is set to become the most advanced research vessel in the world. The vessel will be packed with advanced oceanography equipment including an autonomous submersible, as well as laboratories and an auditorium, and has been designed to be as fuel-efficient as possible. REV Ocean was technically launched in August 2019 at the Fincantieri/ Vard Holdings yard, but in 2020 the team behind the project announced that construction had been significantly delayed and that REV Ocean will not set sail until at least 2024.

One of the most secretive large-scale projects underway, very little is known about the 158m Project Blue, currently underway at Lürssen in Germany. Due for delivery in 2023, Project Blue is understood to have an interior volume close to the 15,917GT Dilbar.

Also underway at Lürssen in Germany, the 146m secret superyacht project Project Opera was technically launched for the first time in early 2021. It is understood to be the rebuilt 145m Project Sassi, which was sadly destroyed in the company's 2018 shipyard fire. Project Opera is reported to have a 20m beam and an interior volume exceeding 10,000 GT. 

In May 2021 she was spotted on the move as she headed to Lürssen's outfitting facility in Bremen. 

The 145m Lürssen superyacht Project Luminance is taking shape at the German yard and is understood to be based at an outfitting facility in Lemwerder where it will complete construction ahead of its launch date in 2022. 

It comes after the bow section of the ultra-secret superyacht was glimpsed underway at Lürssen for the first time early in 2021.

Currently on hold, the 141m Dream Symphony began construction in 2011 at Dream Ship Victory in Turkey. Designed by Dykstra Naval Architects, Dream Symphony is a monohull sailing yacht with accommodation for a total of 18 guests and 32 crew members. 

Currently on hold, the 127m Privilege One was originally due for delivery in 2022. Designed by Laraki Yacht Design, the yacht is set to include amenities such as five swimming pools, a beauty parlour, cinema, two helicopter pads and a submarine that emerges from the side of the hull. 

Accommodation is for a total of 28 guests and 39 crew. In 2018, it was reported that the main facility of shipyard Privilege Yachts had been put up for auction. 

Recently linked to Amazon founder Jeff Bezos, this massive 127m sailing yacht is currently underway at Dutch yard Oceanco. Little is known about this ultra-secretive project, but it is understood that the yacht is a three-masted schooner with an aluminium and steel construction. 

The yacht is set to become the largest sailing yacht in the world when it is delivered in 2022. She was recently glimpsed for the first time as she left the shed at Oceanco.

Sold by German yard Lürssen and Moran Yacht and Ship in 2019, the 125m Project JAG is designed by Nuvolari Lenard with an interior by Reymond Langton. 

Scheduled for delivery in 2023, the yacht will have accommodation for a total of 20 guests in 11 cabins and a number of standout features include a helipad, beauty salon, spa, sauna, swimming pool, indoor and outdoor cinema and a dance floor. Project JAG will have ample room for toys and tenders, including a sailing dinghy, Sea Bobs, windsurfers and a submarine.  

Project Y910 was designed by Cor D. Rover with naval architecture by McFarlane ShipDesign and interior design by Winch Design and Stirling & Co. Originally built as a passenger vessel at Stocznia Gdynia in Poland, she was extended in 2006 with a new bow, transom and superstructure. 

At 120m, Project Y910 can accommodate up to 36 guests across 18 suites with a crew of 50. Highlights of the 6,000 GT project include hybrid diesel-electric propulsion, two full-beam tender garages, two certified helipads, a heli hangar with refuelling capabilities and two swimming pools. Project Y910 is presently under consideration to be sold at auction in December 2021 and is currently berthed at Fincantieri Shipyard in Trieste ready for outfitting.

Announced in September 2020, the 120m in-build Amels superyacht Project Signature is designed by superyacht designer Espen Øino and marks the second custom collaboration between the studio and the Dutch shipyard. Described as a "unique and powerful" vessel by Imperial, 

Project Signature is set to be a "green, ecological superyacht" with diesel-electric engines and Azipod propulsion with superlative noise and vibration management. Project Signature is due for delivery in 2025.

Technically launched at the end of 2020, the 118m Project 1010 is set to become Feadship's largest build to date, superseding the 110 metre Anna which launched in 2018. Project 1010 is now undergoing outfitting at Feadship's Makkum facility where it will remain until the official launch in 2022. 

Setting a new size record for an Abeking & Rasmussen build, this project has been kept under tight wraps. The 118 metre Project 6507 is said to be designed for adventurous cruising, with lots of room for tenders, toys and even a submarine. 

One report claims there is also a Neptune Lounge, where guests can relax and dine. The yacht's designer, Joseph Dirand, is better known as an architect and a furniture designer, who makes much of his "French touch" and art of living. His biggest project to date has been a 26-metre Otam.

The 117m superyacht Y719 currently underway at Oceanco takes the title as the largest superyacht under construction in The Netherlands. The highly, secretive 117 metre superyacht was revealed for the first time in October 2021 after it launched from the yard's Alblasserdam facility. 

While details remain sparse, it is known that Y719 features a steel hull and aluminium superstructure, five decks and is scheduled for a 2021 delivery. 

Little is known about this mysterious 111m superyacht currently underway at Freire Shipyard in Spain. Known as Freire NB-724 and due for delivery in 2022, the yacht is designed by Marin Teknikk and features a steel hull, aluminium superstructure and interior volume of 6,950GT.

Nothing is yet known about the 110m in-build superyacht Oceanco Y722, which is due for delivery in 2023.

Currently undergoing outfitting, the 109m Oceanco superyacht Y720 is designed inside and out by Sinot Yacht Architecture and Design and is due for delivery in 2021. 

Key features include three deckhouses on the main, bridge and upper decks, which are all surrounded by glass windows. Lateral Naval Architects meanwhile is responsible for naval architecture. 

Currently underway at German yard Lürssen, with a delivery date set for 2022, the 107m Northern Star features an aft deck helipad, inverted bow design and interior volume of more than 6,500GT. 

It is also understood that Northern Star will have state-of-the-art energy saving, power storage and heating and cooling systems while the interior will have accommodation for a total of 20 guests.

Very little is known about the 105 metre Oceanco project other than its codename, Y1050. 

The vessel is currently under construction in the Netherlands and is set for a 2022 delivery. Oceanco Y1050 will join an exclusive fleet of 100m+ superyachts.