The Iconic raked in $370.5 million in revenue last year, a 38.3% increase on 2017.
While the etailer posted a net loss of $18.3 million, this included a charge of $15 million relating to a cash reward scheme.
Excluding the scheme costings, it reduced its net loss by two thirds on last year.
The loss was also attributed to increased sales and marketing costs 33.6%, as well as a 50% rise in distribution expenses due to doubling its distribution centre capacity.
Staff numbers rose 75% to 1000 in 2018, adding 55% to administration costs.
Parent company Global Fashion Group has injected $17.7 million in cash to drive growth.
Other key metrics in 2018 included:
1. Double digit market share
The Iconic reported it hit double digit market share, with 15% of all households across Australia and New Zealand shopping with the retailer throughout 2018.
2. Growth in brand partners
The Iconic now has over 1,000 brands and 60,000 products on site including House of Holland, Swarovski and Nudie Jeans
3. Mobile-first tech targets
The Iconic's mobile-first strategy hit new targets, with the app garnering over two million downloads across iOS and Android, and seven out of every 10 visits to the site via mobile.
4. Record traffic
The Iconic receives over 150 million visits annually.