National Security Strategic Investment Fund
The National Security Strategic Investment Fund (NSSIF) is the UK Government's deep tech venture capital fund for National Security and Defence, investing in early-stage companies developing "dual-use" technologies with both commercial and national security applications. Its strategy focuses on providing patient capital for long-term growth in critical sectors like AI, quantum technologies, semiconductors, and advanced manufacturing, to strengthen the UK's technological infrastructure and strategic interests.
43% of their portfolio is in Defense & Space. Deal activity increased 50% year-over-year (3 deals in the last 12 months). Their most common stage is series-a (43% of deals). Average disclosed round size is $37.1M (across 7 rounds with reported amounts).
Portfolio
7
Fund Size
—
Top Stage
Series A
Last 12 Mo
3
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
| MMutable Tactics | Pre-Seed | $2.1M | Mar 2026 |
 Optalysys | Series A | $26.4M | Jan 2026 |
 Space Forge | Series A | $26.8M | May 2025 |
 Tekever | Series B | $70M | Nov 2024 |
 Riverlane | Series C | $75M | Aug 2024 |
 Quantum Motion | Series C | $50.5M | Feb 2023 |
| Quantum Motion | Series A | $9M | May 2020 |
Top Co-Investors
Last updated: 16 April 2026