# Partnos

Partnos is a Single Family Office based in Sastamala, Finland.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Sastamala, Finland
- **Region:** Europe
- **Address:** Sastamala, Finland
- **Founded:** 2012
- **Assets under management:** 68 (Altss estimate)
- **Website:** partnos.fi
- **LinkedIn:** https://fi.linkedin.com/company/partnos

## Regulatory record

- **Reports private funds:** No

## About

Partnos traces its roots more than fifty years to Jarmo Nieminen. He founded the firm after exiting Vexve Oy, where he served as owner and CEO. Kirsi-Marja Nieminen participates in governance as a family owner. The firm deploys capital through direct co-investments and SPVs alongside real estate. Asset classes include industrial ownership, commercial and residential properties, and operating hospitality venues. Confirmed holdings encompass Tyrvään Pappila, Funkkistalo, Mattilan Majatalo, and Kärppälän Ratsutila, all located in Finland. Geographic focus remains Europe with no disclosed positions outside the region. Cultural initiatives such as Tyrvää Jazz and Art Pappila operate as integrated vehicles. Partnos maintains a compact team led by CEO Satu Herrainsilta and Creative Manager Helimaaria Utriainen. No additional offices appear in public records. Adjacent activities center on local networks including the Tampere Chamber of Commerce and Visit Tampere Partner Network. No operational events from the last twenty-four months have been recorded. Partnos integrates family governance with direct control of operating companies and real assets. This structure allows alignment between investment decisions and legacy preservation without external fund commitments.

## Sectors

- Industrial Tech
- Supply Chain & Logistics
- Real Estate

## People

- Jarmo Nieminen — Founder
- Kirsi-Marja Nieminen — Family Member
- Satu Herrainsilta — CEO
- Helimaaria Utriainen — Creative Manager

## Questions

### Who runs investment decisions at Partnos?

Jarmo Nieminen serves as founder and 100 percent owner. Satu Herrainsilta acts as CEO with day-to-day responsibility for investment and hospitality operations.

### How does Partnos source proprietary deal flow?

The firm relies on local networks in the Tampere region and direct relationships developed through prior industrial ownership. No external placement agents are referenced.

### Is Partnos structured as a single family office or does it operate more like a venture firm?

Partnos functions strictly as a single-family office. It does not raise external capital or manage third-party funds.

### Does Partnos participate in fund commitments or only direct deals?

The firm executes direct co-investments and SPVs. No allocations to external funds are disclosed.

### What investment stages does Partnos typically target?

Partnos focuses on mature industrial ownership and operating real estate assets. Early-stage venture activity is not indicated.

### Does Partnos maintain philanthropic structures, and how are they separated?

No separate philanthropic foundation is disclosed. Cultural programming through Art Pappila and Tyrvää Jazz operates as part of the commercial portfolio.

## Related profiles

- [Panteles Advisors](https://altss.com/profile/panteles-advisors)
- [DLF Venture](https://altss.com/profile/dlf-venture)

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Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/partnos

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