| Name: | Adventurer (former: 4 Puppies, Unity) |
| Length: | 40m (130ft) |
| Guests: | 14 |
| Crew: | 8 |
| Builder: | Palmer Johnson |
| Designer: | Palmer Johnson Design Team |
| Interior Designer: | Palmer Johnson Design Team |
| Year: | 2003 |
| Engines: | Caterpillar |
| Speed: | 15 |
| Volume: | 399 tons |
| MMSI: | 339911000 |
| Price: | $10,000,000 |
| Owner: | Martin Peter Holt |
The ADVENTURER yacht, still widely known online under her former name 4*PUPPIES, is a classic American-built motor yacht with long-range capability, generous volume, and a warm family-cruising character. Built by Palmer Johnson in 2003 and refitted in 2022, she combines the strength of U.S. yacht construction with the comfort and practicality expected from a proven 40-meter displacement yacht.
Originally launched as UNITY, the yacht later became known as 4*PUPPIES before being sold and renamed ADVENTURER. Despite the name change, many yacht databases, brokerage references, and online search results still identify her as 4*PUPPIES, which explains why both names remain connected to the vessel.
ADVENTURER is linked to American businessman Peter Martin Holt, the former head of HOLT CAT and former controlling owner of the San Antonio Spurs. Holt is part of one of America’s most important Caterpillar dealer families and has long been associated with business, sports, philanthropy, and yachting.
ADVENTURER was built by Palmer Johnson, one of the best-known American yacht builders. The shipyard, historically based in Sturgeon Bay, Wisconsin, built a reputation for strong aluminum yachts, sport yachts, custom motor yachts, and high-quality American craftsmanship.
At 39.62 meters, ADVENTURER sits in a highly practical size category. She is large enough to offer excellent guest comfort, crew space, long-range cruising ability, and big-yacht systems, while still being compact enough to access a wide range of marinas and anchorages.
Her 399 GT volume is especially important. It gives her the spacious feel of a larger yacht while keeping her just under 400 GT, a practical threshold for regulation, operation, and management.
ADVENTURER measures 39.62 meters, or 130 feet, with a beam of approximately 8.53 meters and a draft of about 2.01 meters. She has an aluminum hull and aluminum superstructure, which helps keep her strong, efficient, and well suited for long-range cruising.
She is powered by twin Caterpillar diesel engines. Her top speed is around 14.5 to 15 knots, while her comfortable cruising speed is approximately 12 knots.
One of her most attractive technical features is her long-range capability. Brokerage and yacht data sources describe ADVENTURER as having transatlantic range, with reported range figures of around 5,000 nautical miles. That makes her suitable for extended cruising between the United States, Caribbean, Mediterranean, and remote destinations.
The yacht received a significant refit in 2022. Brokerage information describes several important upgrades, including a full paint job, a new air-conditioning plant, a new shore-power converter, and major top-end servicing of the main engines.
These updates are important because they make ADVENTURER more attractive as a proven, modernized yacht rather than simply a 2003 build. A well-executed refit can extend a yacht’s useful life, improve comfort, reduce technical risk, and make ownership more enjoyable.
Her 2022 refit helped preserve her classic Palmer Johnson quality while refreshing the systems and appearance expected by modern owners.
ADVENTURER has a bright and welcoming interior with a layout designed for comfortable family cruising and entertaining. Her interior design is credited to Preston Phillips and A La Mer.
The yacht can accommodate up to 10 guests in her standard five-cabin arrangement, with some brokerage descriptions noting that she can sleep up to 14 guests when using the convertible study as an additional sleeping space.
Her accommodation includes a full-beam owner’s suite, VIP and guest cabins, and a flexible study with an attached full bathroom. This study can be used as an office, children’s lounge, playroom, media space, or sixth guest cabin.
She carries a crew of around 8, allowing for professional service and safe operation during extended passages.
ADVENTURER offers the kind of exterior spaces that make a yacht ideal for warm-weather cruising. Her sundeck features a central Jacuzzi, sun pads, bar, barbecue, and seating areas for relaxing, dining, and entertaining.
The yacht also has a spacious sky lounge with panoramic windows, a bar, game table, and comfortable lounge seating. This gives guests an attractive indoor-outdoor lifestyle, with options for both casual family time and more formal entertaining.
Her shallow draft adds to her cruising appeal, allowing access to anchorages and destinations that deeper yachts might find more difficult.
The yacht was originally launched as UNITY. She later became known as 4*PUPPIES, a distinctive name that made her easy to identify in marinas and yacht databases.
After a later sale, she was renamed ADVENTURER. The new name fits her character well: a capable, long-range yacht built for owners who enjoy serious cruising rather than simply short coastal trips.
Because online yacht records often take time to update, many websites still show her as 4*PUPPIES or list both names together. For search purposes, the best description is: ADVENTURER, ex-4*PUPPIES, ex-UNITY.
The yacht ADVENTURER is associated with Peter Martin Holt, an American businessman best known for his leadership of HOLT CAT and his long connection to the San Antonio Spurs.
Peter M. Holt was born in 1948 and is part of the famous Holt family, whose history is closely connected to Caterpillar equipment. The Holt name traces back to Benjamin Holt, who developed the first practical track-type tractor in the early 1900s. That innovation helped inspire the Caterpillar name and became one of the foundations of modern heavy equipment.
HOLT CAT grew into the largest Caterpillar dealership in the United States. The company serves major industries across Texas, including construction, energy, infrastructure, mining, oil and gas, power systems, agriculture, and heavy equipment support. Peter Holt helped expand and modernize the business, building on generations of family involvement in Caterpillar distribution.
Holt is also well known in American sports. He became involved with the San Antonio Spurs in the 1990s and helped keep the franchise in San Antonio. During his time as the team’s controlling owner, the Spurs became one of the most successful organizations in the NBA, winning championships in 1999, 2003, 2005, 2007, and 2014. His era of ownership is closely associated with stability, long-term management, and the championship culture built around Tim Duncan, Gregg Popovich, Tony Parker, and Manu Ginóbili.
Beyond business and sports, Holt is a Vietnam veteran and recipient of major military honors, including the Silver Star, Bronze Stars, and Purple Heart. His public story is often framed around service, family enterprise, resilience, leadership, and loyalty to San Antonio.
Peter M. Holt’s net worth is estimated at around $800 million. His wealth is primarily linked to the Holt family’s long-standing Caterpillar dealership business, HOLT CAT, as well as past sports ownership, investments, real estate, and other private assets. HOLT CAT is widely regarded as the largest Caterpillar dealer in the United States, serving major industries across Texas, including construction, energy, mining, infrastructure, agriculture, and power systems.
The company is also linked to private aviation. HOLT CAT owns a Bombardier Challenger 300 private jet with the registration N610HC. The Challenger 300 is a super-midsize business jet known for its range, comfort, and efficiency, making it well suited for business travel between company locations, client meetings, and private destinations.
In recent news, Peter M. Holt and a former yacht captain became involved in dueling lawsuits involving disputed allegations related to drug transport and alleged extortion. The claims are contested, and Holt has strongly denied wrongdoing while filing his own counterclaims. Because the matter is ongoing litigation, it should be treated as an unresolved legal dispute.
A yacht such as ADVENTURER is estimated to be worth in the range of $8 million to $12 million, depending on her condition, refit quality, equipment, survey results, market demand, and final sale terms.
Her value is supported by several strengths: Palmer Johnson build quality, Caterpillar machinery, a 2022 refit, large volume under 400 GT, shallow draft, transatlantic range, and a flexible family-friendly layout.
Annual running costs for a yacht of this size are typically estimated at around $1 million to $1.5 million, depending on crew, insurance, maintenance, cruising schedule, fuel use, dockage, and management.
Palmer Johnson is one of the most respected names in American yacht building. Founded in the early 20th century, the company became known for building custom sailing yachts, motor yachts, aluminum yachts, and later high-performance sport yachts.
The yard’s Sturgeon Bay heritage gave it a reputation for strong engineering and practical yacht construction. Palmer Johnson yachts from this era are often appreciated for their durability, seakeeping, and American craftsmanship.
ADVENTURER is a good example of Palmer Johnson’s ability to build a yacht that is not only attractive, but also capable of real long-distance cruising.
ADVENTURER’s twin Caterpillar engines are a fitting feature given her connection to the Holt family. Caterpillar machinery is widely respected in the marine world for durability, serviceability, and global support.
For an owner with deep ties to Caterpillar through HOLT CAT, a yacht powered by Caterpillar engines is a natural match. The combination of long-range cruising, proven engines, and accessible support makes ADVENTURER a practical and confidence-inspiring vessel.
ADVENTURER is not a flashy new-build yacht trying to chase trends. Her appeal is different. She is a proven, American-built, long-range yacht with comfortable guest spaces, a major refit, practical systems, and a strong cruising profile.
Her name suits her purpose. ADVENTURER is built for owners who want to travel, explore, host family and friends, and enjoy the sea in comfort. She has enough volume for relaxed onboard living, enough range for serious passages, and enough character to stand out from more generic yachts.
The yacht formerly known as 4*PUPPIES is now named ADVENTURER.
ADVENTURER was originally launched as UNITY. She later became 4*PUPPIES before being renamed ADVENTURER.
ADVENTURER was built by Palmer Johnson in the United States and delivered in 2003.
ADVENTURER measures 39.62 meters, or 130 feet.
Her exterior design is credited to Palmer Johnson and Murray & Associates. Her interior is credited to Preston Phillips and A La Mer.
ADVENTURER can accommodate up to 10 guests in standard use, with some layouts allowing up to 14 guests when the study is used as an additional cabin.
ADVENTURER is associated with American businessman Peter Martin Holt, former leader of HOLT CAT and former controlling owner of the San Antonio Spurs.
ADVENTURER is not believed to be available for public yacht charter.
Her estimated value is around $8 million to $12 million, depending on condition, refit details, and market factors.
ADVENTURER, formerly known as 4*PUPPIES and originally launched as UNITY, is a well-built 40-meter Palmer Johnson yacht with a strong American pedigree, transatlantic range, practical Caterpillar machinery, and a comfortable family-focused layout.
Her 2022 refit gave her renewed appeal, while her name change to ADVENTURER reflects her true personality: a capable yacht designed for travel, exploration, and time well spent at sea.
Her association with Peter M. Holt adds another layer to the story. Holt’s background with HOLT CAT, the San Antonio Spurs, military service, and American business leadership makes ADVENTURER not just a yacht, but part of a wider story of enterprise, family legacy, and life on the water.
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