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Neptunia
pull test

Posidonia: how it all began

Once upon a time, there were three pioneers, Enrico Ardito, Giuseppe Ardito, and Cesare Livraghi, who, before World War II, started recycling spare parts under the name 'Neptunia'.

In the 1960s, Posidonia expanded its business by designing, building, and installing mooring buoys for Italian and international offshore oil terminals and platforms, thus beginning collaborations with world-renowned clients such as Shell and Eni.

As second-hand anchors, chains, and moorings were used, a 500-ton pull test was set up for retesting.

The same pull test is still the most powerful in the Mediterranean, approved by major classification societies.

In 1973, Ettore Ardito, son of Giuseppe Ardito and grandson of Enrico Ardito, joined the company and worked alongside Cesare Livraghi to move the company forward.

In 1980, Neptunia took a decisive step: it ceased reselling second-hand equipment to launch its own production of High Holding Power (HHP) anchors. This leap in quality was born from the meeting between Ettore Ardito and engineer Arie Ouwehand, a key figure in the development of the renowned POOL® anchors. This partnership led to the licensed production of HV® anchors in Italy: a perfect blend of Dutch engineering rigor and Posidonia’s manufacturing excellence, capable of meeting the most stringent quality standards of international classification societies.
It marked the beginning of a strategic collaboration and a technical dialogue that has evolved over decades and remains a fundamental pillar of our business today.

From Neptunia to Posidonia
marine chains

From Neptunia to Posidonia

In 1984, with the entry of new partners such as Giuseppe Ruzzin, who had been with Neptunia since the 1950s, and Fausto Peirano, along with the Ardito family, Neptunia became Posidonia - a new company focused on producing Made in Italy products.

At the time, the market for chains was still strong but required new ideas. Therefore, in 1990, Posidonia was one of the first companies to explore the Chinese and Indian markets. It concluded its first joint venture with a Chinese chain factory, offering immediate shipping at the lowest price in Europe.

Posidonia was also an early adopter of open market policies, interacting with major European and international names. In 1996, it was one of the first companies to be approved by all naval registries for its Emergency Towing System, in compliance with the new IMO regulations.

In the early 2000s, Giacomo Ardito, Serena Ardito, and Emiliano Seggi joined the company, taking the place of Ettore Ardito and Giuseppe Ruzzin, who became honorary presidents.

This new generation led the company towards customization of anchors and deck materials. 

Today, Posidonia is a leader in custom-designed anchors produced in Italy and certified by organizations worldwide.

Posidonia's achievements


  • In 2011

    After 3 years of study and testing, Posidonia obtained approval from ABS, RMRS, RINA, BV, LR, and DNV for its SHHP anchors. Today, Posidonia works with all IACS entities and with all national and international naval and river registers.

  • In March 2013
    first record

    Posidonia achieved its first record: the PTW+® SHHP (Super High Holding Power) anchor, the world's largest anchor made of DUPLEX® - a special stainless steel with impressive mechanical properties and corrosion resistance.

  • On November 2, 2013

    Posidonia reached its latest milestone: the 15,000 kg PTW HHP (High Holding Power) anchor! One of the largest welded anchors ever built in the EU, it was replicated in 2020 with another 21-tonne PTW anchor.

  • In 2015

    Posidonia relocated its production facility from Genoa to Novi Ligure, with new offices, warehouse, and workshop covering over 6,000 sqm strategically located between two highways.

  • In 2017
    The world's most luxurious anchor was born

    AIDA, an anchor decorated with Crystal Caviar crystals for luminous and sparkling anchors. AIDA was the first of the super-customized anchors, not only for mechanical performance, less weight and more performance, but also for aesthetics, confirming our leadership in the Super yacht market.

  • In 2019

    Openable Panama chock with RINA certification.

  • In 2020

    Supply of anchors for 10 Royal Australian Navy vessels (Evolved Cape-class patrol boats).
    Supply of 21-ton anchors for the world's largest cruise ship.

  • In 2022

    Manufacturing of submarine anchors.
    Supply of 4-ton anchors for Zuckerberg's hydrogen-powered yacht (the largest built in the Netherlands).

  • In 2023

    Participation in IMDEX Singapore (defense sector).
    Purchase of a COBOT for semi-automatic welding.
    Green transition: installation of a 50 kW solar panel system and subsequent energy supply certification.

  • In 2024

    Hook bollard for the Italian Navy with RINA certification.
    Design/development of the Weak Link with LR certification.
    New commercial partnership in Turkey.

  • In 2025

    Opening of the new warehouse facility.
    Certifications for COMPACT (LR) and Plow anchors (BV and LR).
    First non-magnetic cast AC-14 anchor manufactured in Italy for the Italian Navy (with RINA certification).
    Supply of anchors for 100% electric shuttle vessels ("water taxis") in Sweden, expanding throughout Northern Europe (Candela project).

  • In 2026

    First participation in Seawork (opening up to a new market).
    First production of aluminum cruciform bollards and double bitts (presented at Seawork).
    Supply of anchors, chains, and deck equipment, including the first castings in Italy suitable for low temperatures (-50 °C).

Posidonia Srl has evolved over almost 100 years while still keeping its tradition alive. Its expertise and skills have been acquired over time, reflecting the company's long-standing profession.
News and Events
Pull Test Posidonia Srl
How a Marine Anchor Is Certified: From Design to Marking
11 September 2026
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100% Quality
ISO 9001:2015 quality system and IACS approvals guarantee our 100% quality products.
Abs Certification
Bureau Veritas Certification
DNV Certification
Korean Register Certification
Lloyd's Register Marine Certification
ClassNK Certification
Russian Maritime Register of Shipping Certification
RINA Certifcation
ISO 9001 Certification

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UFFICI E OFFICINA - HEAD OFFICE AND WAREHOUSE: VIA TRATTATO DI MAASTRICHT 10 - 15067 - NOVI LIGURE - AL - ITALY PHONE +39 0143 76669 - FAX +39 0143 143 2230 P. IVA 01289670109 REA: GE - 283254 CAPITALE SOCIALE € 161.683,00