Sirius Venture Partners

Managing Partner Friedrich von Diest has the final say on commitments. He has been an active business angel and founder since 1992 and personally sourced, financed and exited roughly 25 technology companies before formalizing the Sirius platform in 1998. Co-Managing Partner Michael Blum oversees organizational development and communications but the investment pipeline flows through von Diest and the Venture Partners he selects.

Sourcing depends on von Diest's 30-year network of entrepreneurs, operators and fellow business angels concentrated in the German Mittelstand technology ecosystem. The firm's Venture Partners — former interim managers, corporate-strategy advisors and eco-tech specialists — bring their own regional and sector-specific relationships. Sirius explicitly markets this as a 'hochkarätiges Netzwerk' and lists more than 2,500 evaluated business cases as evidence of top-of-funnel reach.

Sirius operates as a private equity GmbH with no disclosed external limited partners, making it structurally closer to a permanent-capital investment office than a fund manager that recycles committed capital. The firm has not announced a fundraising cycle and its deployment rhythm tracks von Diest's personal balance sheet, not vehicle-level timelines. Allocators should treat it as a co-investment or deal-by-deal counterparty rather than a blind-pool fund.

The firm's disclosed model is exclusively direct equity and co-investment in operating companies. Friedrich von Diest's background includes acting as a 'Fondsinvestor' since 1998, so the team may evaluate fund stakes on a personal-account basis, but Sirius Venture Partners itself describes its mandate as Beteiligungen an Unternehmen — direct equity participations in companies.

The firm invests from late seed ('späte Seed-Phase') through expansion and into founder-succession situations. Von Diest's track record includes company formation, growth financings, M&A-led consolidation and IPOs with volumes up to EUR 100 million, so the team is comfortable holding positions across the full corporate lifecycle — provided the company exhibits what the firm calls 'überdurchschnittliches Wachstumspotenzial'.

Sirius does not publish a formal exclusion list. The stated focus is innovative technologies, products and business models with above-average growth potential. Its Venture Partners' functional expertise covers enterprise software, industrial tech, digital health and climate-related enterprises; sectors outside those domains are unlikely to meet the partnership's underwriting criteria.

No philanthropic foundation linked to Sirius Venture Partners has been publicly disclosed. The firm's public record is entirely commercial; any charitable or social-impact activities that von Diest or his partners undertake appear to be conducted through personal vehicles unconnected to the GmbH.