| 1966 On the 14th of January 1966, the 1st tug named Ultramar arrived in Chile, in Arica, the most modern tug at the time, fitted with steerable nozzle around the propeller, providing an improved maneuverability |
 |
|
1969 Ultramar II arrived in Chile, a tug with similar features as Ultramar, however positioned in Valparaiso, Chile´s main port. |
|
1974 Newly built Ultramar III arrived in Chile, positioned in San Antonio |
 |
|
1976 The only tugboat in Antofagasta was bought, operated by PSNC under the name of Coloso and was renamed Ultramar IV |
 |
|
1977 Ultratug saw a new opportunity, buying 2 more tugs, built in Spain from an owner that went bankrupt and renamed them Ultramar V and Ultramar VI. They were positioned in Valparaiso and San Antonio, while Ultramar III was relocated in San Vicente. |
| 1979 A 2nd hand tug was bought in Germany, renamed Ultramar VII, which was positioned in Punta Arenas. One year later, came Ultramar VIII, which was located in the same port. |
 |
 |
1981 Ultramar IX was purchased, positioned in San Antonio, being fitted with fire-fighting equipment, necessary for the chemical terminals in that port. |
| 1983 Enap developed its offshore activity in the Magellan Straight area. Ultratug successfully won a tender to provide transportation for Enap´s personnel working on the oil rigs with a crew boat named Ñandú. |
 |
 |
1984 Ultramar X was constructed in Germany, a powerful multipurpose tug fitted with the new ASD propulsion system, the 1st tugboat of this type in Chile and South America, fitted with anchor handling and fire-fighting equipment, being able to assist in ports, oil & gas terminals and the offshore industry. |
| 1985 Ultratug joined forces with Smit Lloyd from Holland and successfully won a tender to provide offshore support services for Enap in the Magellan Strait with 5 AHTS (Anchor Handling Tug Supply) vessels |
 |
| 1990 Hand in hand with the business growth in Chile, booming import and export activity, Ultratug gradually developed its fleet until reaching 14 units in 1990. Moreover, Kenrick was acquired, a traditional agency which also operated tugboats in Valparaiso and San Antonio, enabling us to consolidate our position in those 2 ports. |
 |
 |
1991 Ultratug purchased the first two tugs ever built in Chile, named Pangui & Pulli |
| 1992 Ultratug saw an opportunity abroad with the acquisition of an argentine company named Rio Luján, which operated 3 tugboats in Buenos Aires. |
 |
 |
1993-1995 The 2 smallest tugs of Ultratug fleet were swapped with a large tug named Amadeo, belonging to Comapa. During same year and in 1995, 4 additional tugs were purchased, also built in Chile, sisterships to Pangui & Pulli, but more powerful. |
| 1995 The former Ultramar VI was moved in Perú and renamed Manu, starting our tugboat activity in that country through Petrolera Transoceanica. At the end of the 3rd decade, the total fleet comprised of 26 units: 22 tugs, 3 OSVs (Offshore Support Vessel), 1 crew boat |
 |
|
1996 Due to Enap’s activity in the Chilean Offshore was falling sharply, as oil reserves were depleted, Enap moved to Argentina, through its subsidiary Sipetrol and we followed them, starting our Offshore activity there through our shipping company Antares. |
 |
 |
1999 Taking advantage of the close relationship between Antares and Petrobras, we managed to fix a Timecharter contract with the Brazilian oil company, being this the first step into that market |
| 2000 Looking for synergies, we merged Rio Luján and Antares. |
 |
|
2002 Company Nate was acquired, specialized in providing integral oil terminal support services in Comodoro Rivadavia, Argentina. |
| 2003- 2005 Antares’ tug fleet grew rapidly with 3 tugs, and expanding its business to Bahia Blanca. In 2005, Antares acquired Antillana, increasing its fleet and its share in the Buenos Aires tugboat market |
 |
|
2006 The Joint Venture between Wilson Sons and Ultratug was created, enabling us to grow very rapidly in the Brazilian Offshore market. |
 |
|
2007 We entered in the Ecuadorian harbor towage business, through Japina. |
| 2011 We entered the harbor towage business in Uruguay, through Urutug. |
 |
|
2014 We entered the harbor towage business in Colombia, through Coltugs. Additionally, we commenced our barge transportation business in Uruguay, through Transfluvial. |
| 2016 Ultratug won a tender for harbor towage operation in Lázaro Cárdenas, Mexico, beginning operations in January 2017 under the name of Mextug. In the meantime, the other businesses continued to grow, ending our fifth decade of expansion with a fleet of 99 units: 64 tugs, 23 OSVs, 12 others. |
 |
At present, Ultratug comprises of a modern and versatile fleet of tugs, OSVs, PSV, pilot boats, and Pusher tugs and Barges active in 8 countries.