upseed
Browse programs

Organization · Private Equity

SIG Investments

SIG Investments is a private equity firm based in Rotterdam, focusing on sustainable investments in small to medium-sized enterprises. They employ a disciplined long-term strategy supported by local market knowledge.

Private EquityFunder
Official website (opens in a new tab)

Overview

What SIG Investments does

What SIG Investments is

SIG Investments is a private equity firm based in Rotterdam, focusing on sustainable investments in small to medium-sized enterprises. They employ a disciplined long-term strategy supported by local market knowledge.

How it participates in the startup ecosystem

The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.

Operational profile

Organization status and context

Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.

Operational status
Active
Organization type
Private Equity
Founded
Founded in 2011
Approximate age
About 15 years
Structured capabilities
Funder
Last reviewed
March 4, 2026

Official channels

Find SIG Investments elsewhere

Open the official website or a supported primary organization account.

Capability profile

SIG Investments as a funder

Investment thesis

Stammes Investment Groep emphasizes sustainable investments in small to medium-sized companies. The firm employs a long-term investment strategy supported by local market expertise.

Focus narrative

Stammes Investment Groep invests in small to medium-sized companies, emphasizing sustainable practices. The firm operates with a long-term investment strategy and leverages its local market expertise.

Focus and fit

Regions
Europe

Availability

Currently deploying
Not published

Connected ecosystem

Continue from SIG Investments

These links use structured organization type, sector, and regional relationships. They do not imply endorsement or commercial similarity.

Same organization type

EQT GroupSame type: Private Equity · FunderSummit PartnersSame type: Private Equity · FunderPermiraSame type: Private Equity · FunderAdvent InternationalSame type: Private Equity · Funder

Structured regional focus

EuropeContinent · 12,949 organizations

Common questions

What to know about SIG Investments

Upseed classifies SIG Investments under the Private Equity organization type. Its current public profile includes funder capabilities.

Next step

Keep comparing startup organizations

Return to the organization index or continue through a verified sector, place, peer, or program connected to this profile.

Browse organizationsExplore Europe

Source and update disclosure

Know what this page is based on

Source basis

Public organization and program material, official websites, and structured Upseed records.

Last reviewed

March 4, 2026

Known limits

Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.

Official website Suggest a correction

Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.