Nicolaas Hubertus Holzken is a Dutch kickboxer and professional boxer, widely known for his explosive fighting style and impressive achievements in the world of combat sports.
Competing in both kickboxing and boxing, Holzken is a former Glory Welterweight Champion and has been ranked among the best welterweights in the world.
Here we have Nieky Holzken’s net worth, earnings, career, personal details, and more.
Nieky Holzken’s Biography and Career
| Name | Nieky Holzken |
|---|---|
| Date of Birth | December 16, 1983 |
| Birthplace | Helmond, Netherlands |
| Nationality | Dutch |
| Height | 6 ft (1.83 m) |
| Weight Class | Welterweight (Kickboxing), Cruiserweight (Boxing) |
| Reach | 74.5 inches (189 cm) |
| Style | Kickboxing, Boxing, Muay Thai |
Born on December 16, 1983, in Helmond, Netherlands, Nieky Holzken started his martial arts journey at an early age. He trained in various disciplines such as kickboxing and Muay Thai before eventually transitioning to professional boxing.
His career has been marked by an impressive mix of kickboxing and boxing achievements, solidifying him as one of the top Dutch fighters in the global combat sports arena.
Professional Career
Nieky Holzken began his kickboxing career in the early 2000s, quickly gaining recognition for his sharp striking abilities. Over the years, he rose through the ranks, competing against some of the best fighters in the world.
His breakout came when he became the Glory Welterweight Champion, a title he defended successfully multiple times. He gained further recognition for his technical precision and knockouts, establishing himself as a top contender in the welterweight division.
Holzken’s professional boxing career began as a crossover endeavor, adding another dimension to his skill set. He made his debut in boxing with an undefeated streak and later competed for world titles in the cruiserweight division.
Holzken’s most notable boxing match was in 2018, when he faced Callum Smith for the WBA Super Middleweight Title in the World Boxing Super Series. Although Holzken lost the bout via unanimous decision, he displayed commendable toughness and skill against one of the top fighters in the sport.
As of 2024, Holzken continues to compete in kickboxing, fighting under the ONE Championship banner, where he has faced top-tier talent.
His career highlights include significant victories over elite fighters like Raymond Daniels, Murthel Groenhart, and Cosmo Alexandre.
Achievements
- Glory Welterweight Champion (multiple defenses)
- K-1 European Champion
- Competitor in the World Boxing Super Series for the WBA Super Middleweight title
Nieky Holzken’s Net Worth Details
Nieky Holzken’s net worth is estimated to be $3 million as of 2025, primarily accumulated from his kickboxing career, professional boxing bouts, and various endorsement deals.
His earnings have come from prize money in high-profile kickboxing tournaments, as well as from his participation in major boxing matches.
Fight Purse Earnings
| Fight Purse Breakdown |
|---|
| Glory Welterweight Championship defense (per fight) – $200,000 |
| World Boxing Super Series participation – $500,000 |
Net Worth Growth
| Year | Net Worth (Approx.) |
|---|---|
| 2020 | $1.5 million |
| 2021 | $2.0 million |
| 2022 | $2.5 million |
| 2023 | $3.0 million |
| 2024 | $3.0 million |
Endorsements
Holzken has partnered with several brands throughout his career, with endorsements from combat sports equipment manufacturers and lifestyle brands. Some of the key brands he has collaborated with include Venum, a popular brand for combat sports gear, and NutriForce Sports, a company known for providing supplements and nutritional products.
Professional Boxing Records
| 15 fights | 14 wins | 1 loss |
|---|---|---|
| By knockout | 11 | 0 |
| By decision | 3 | 1 |
FAQs
1. What is Nieky Holzken’s professional boxing record?
Nieky Holzken holds a professional boxing record of 14 wins (11 KOs) and 1 loss. His sole defeat came against Callum Smith in 2018 during the World Boxing Super Series semi-final for the WBC Diamond super-middleweight title.
2. Has Nieky Holzken won any major boxing titles?
Yes, he won the BeNeLux super-middleweight title in 2016 and defended it successfully. However, his primary acclaim comes from kickboxing, where he is a former Glory Welterweight Champion and multi-time world titleholder.
3. How did Nieky Holzken transition from kickboxing to boxing?
Holzken began boxing professionally in 2013 while still active in kickboxing. His striking precision and footwork from kickboxing translated seamlessly into boxing, allowing him to dominate regional circuits before competing in high-profile events like the World Boxing Super Series.
4. What was Nieky Holzken’s most notable boxing match?
His most notable bout was a 12-round unanimous decision loss to Callum Smith in 2018. Despite taking the fight on six days’ notice as a replacement, Holzken showcased resilience and durability against the future WBA super-middleweight champion.
5. Who trained Nieky Holzken in boxing?
Holzken trained under kickboxing legend Ramon Dekkers early in his career, which heavily influenced his striking style. His boxing training was managed by teams in the Netherlands, focusing on adapting his kickboxing techniques to the sweet science.
6. What weight class does Nieky Holzken compete in?
As a boxer, he competed in the super-middleweight division (168 lbs). In kickboxing, he has fought in welterweight, middleweight, and lightweight categories across organizations like Glory and ONE Championship.
7. How has his kickboxing career influenced his boxing style?
Holzken’s kickboxing background honed his aggressive combinations, body-shot expertise, and counter-punching accuracy. His signature liver shot and fluid footwork are hallmarks of the Dutch kickboxing style, which he adapted effectively in boxing.
8. Has Nieky Holzken ever competed in MMA?
While primarily a striker, he fought a special-rules bout against Yoshihiro Akiyama in 2024 under mixed MMA, boxing, and Muay Thai rules. Holzken won via first-round TKO, showcasing his versatility across disciplines.
9. What are Nieky Holzken’s signature techniques in boxing?
He is renowned for his left hook to the body (particularly liver shots) and crisp combinations like the jab-cross-leg kick. His ability to switch stances and pressure opponents with technical precision sets him apart.
10. Is Nieky Holzken still active in boxing?
Holzken remains active in combat sports but focuses predominantly on kickboxing under ONE Championship. His last professional boxing match was in 2018, though he continues to train in both disciplines. These FAQs highlight Holzken’s hybrid career, blending elite striking skills across kickboxing and boxing while cementing his legacy as a versatile combat sports icon.
