Neptunia Invest

CEO and co-founder Johan Karlsson leads the firm alongside his brother Mikael Karlsson, a co-founder and Partner. Chairman Gunnar Brock, former CEO of Atlas Copco and Tetra Pak, provides governance oversight. The firm's website states that influence over core holdings is exercised through board representation, suggesting significant investment authority sits with the founders and board.

Neptunia is a Swedish investment company with corporate bonds listed on Nasdaq Stockholm. It operates as a permanent-capital vehicle, meaning it holds core assets indefinitely rather than cycling through funds with defined lifespans. The capital base combines private equity from founders and co-investors like the Ehrnrooth family with public debt-market funding.

Slättö and MW Group are Neptunia's original core holdings, founded separately by Johan and Mikael Karlsson before the 2014 formation of Neptunia. Slättö is a real estate fund manager investing in Nordic properties across several thematic strategies. MW Group provides services to critical infrastructure and total defense customers in the same region. Both remain core, long-duration holdings.

Since 2019, Neptunia has built a minority-stake portfolio focused on entrepreneur-led companies with digital business models. These positions sit alongside its controlling core holdings in Slättö and MW Group. The firm describes itself as 'one of several significant investors' in these minority deals, adding capital and industrial networks rather than seeking full operational control.

The firm's website identifies real estate, defense and security, and energy as its explicit investment sectors. Sectors outside these three — such as consumer goods, software, or healthcare — do not appear in its disclosed mandate. The listed minority-stakes portfolio may provide some indirect technology exposure, but the core strategy remains resolutely asset-heavy and Nordic-focused.