# National Security Strategic Investment Fund (NSSIF): portfolio, investments and team > National Security Strategic Investment Fund (NSSIF) is a corporate vc based in United Kingdom. Source: https://millionrounds.com/fund/national-security-strategic-investment-fund-nssif (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Investor](https://millionrounds.com/investors) # National Security Strategic Investment Fund (NSSIF) Last cheque observed Sep 2026; 6 cheques on record. Email Deploying now Corporate VC Seed Growth Deep Tech National Security Defence Follow National Security Strategic Investment Fund (NSSIF) and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fnational-security-strategic-investment-fund-nssif) Deploying now **100%** of best year **5** **cheques in 12 months**, 6 on record Since the last cheque **47** days **00** hrs **00** min **00** sec Median round **$50M** Rounds led **0 of 6** Mostly in **United Kingdom, 67%** Pitch National Security Strategic Investment Fund (NSSIF) ## National Security Strategic Investment Fund (NSSIF) highlights - 01 5 cheques in the last 12 months - 02 Mostly Series A and Growth: 67% of its rounds ## What they do > The UK Government’s deep tech venture capital fund for National Security and Defence. From their own website - **Type:** Corporate VC - **Cheque size:** Not stated - **Stages:** Seed Growth - **Sectors:** Deep Tech National Security Defence - **Based in:** United Kingdom - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **6 appearances** - **2026** 4 rounds - **Sept** **[Open Cosmos](https://millionrounds.com/company/open-cosmos)** Growth · GB · ETF Partners **$346M** With 11 others - **Jul** **[Greenjets](https://millionrounds.com/company/greenjets)** Series A · GB · Firms' own news pages **$40M** With 3 others - **Jun** **[Optera](https://millionrounds.com/company/optera)** Seed · US · Firms' own news pages **$4.0M** With 4 others - **Apr** **[Archangel Lightworks](https://millionrounds.com/company/archangel-lightworks)** Series A · GB · Firms' own news pages **$13M** With 7 others - **2025** 1 round - **Dec** **[Nu Quantum](https://millionrounds.com/company/nu-quantum)** Series A · GB · Firms' own news pages **$60M** With 10 others - **2024** 1 round - **Nov** **[Tekever](https://millionrounds.com/company/tekever)** Series B · PT · TechCrunch **$74M** With 5 others An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor. ## What they claim to have backed From their own portfolio page (on their website) **21** of 26 we have independently watched raise [Archangel Lightworks](https://millionrounds.com/company/archangel-lightworks)[Bazze](https://millionrounds.com/company/bazze)[Duality](https://millionrounds.com/company/duality-technologies)[Greenjets](https://millionrounds.com/company/greenjets)[ICEYE](https://millionrounds.com/company/iceye)[Kraken Technology](https://millionrounds.com/company/kraken-technology)[Mutable Tactics](https://millionrounds.com/company/mutable-tactics)[Nu Quantum](https://millionrounds.com/company/nu-quantum)[Optalysys](https://millionrounds.com/company/optalysys)[Orca Computing](https://millionrounds.com/company/orca-computing)[Oxford Space](https://millionrounds.com/company/oxford-space-systems)[PSIQuantum](https://millionrounds.com/company/psiquantum)[Photonic](https://millionrounds.com/company/photonic)[Quantum Motion](https://millionrounds.com/company/quantum-motion)[Red6](https://millionrounds.com/company/red-6)[Refute](https://millionrounds.com/company/refute)[Riverlane](https://millionrounds.com/company/riverlane)[Sofant](https://millionrounds.com/company/sofant-technologies)[Space Forge](https://millionrounds.com/company/space-forge)[TEKEVER](https://millionrounds.com/company/tekever)[Wayland Additive](https://millionrounds.com/company/wayland-additive) ClearSpace Delta.g Optera Sensofusion Untap Health Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded. ## The cheque Seed Growth Median round joined **$50M** the round, not its cheque Led 0 of 6 rounds **0%** - **Sole investor:** Never alone - **Last cheque:** Sept 2026 Rounds by stage said on their site - Series A *3* - Growth said *1* - Seed said *1* - Series B *1* Cheques by month Led Joined Nov 2023 Oct 2026 Often in the room with - [Blackfinch Ventures](https://millionrounds.com/fund/blackfinch-ventures) 2 - [NATO Innovation Fund (NIF)](https://millionrounds.com/fund/nato-innovation-fund) 2 **Pitching National Security Strategic Investment Fund (NSSIF)?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Who they invest alongside The investors most often in the same rounds as National Security Strategic Investment Fund (NSSIF). A count of rooms they were both in, not a relationship either has claimed. [**Blackfinch Ventures** VC firm **2** rounds together](https://millionrounds.com/fund/blackfinch-ventures)[**NATO Innovation Fund (NIF)** VC firm **2** rounds together](https://millionrounds.com/fund/nato-innovation-fund) ## Recently backed The latest companies National Security Strategic Investment Fund (NSSIF) put money into. [**Open Cosmos** $346M · Sept 2026](https://millionrounds.com/company/open-cosmos)[**Optera** $4.0M · Jun 2026](https://millionrounds.com/company/optera)[**Archangel Lightworks** $13M · Apr 2026](https://millionrounds.com/company/archangel-lightworks)[**Nu Quantum** $60M · Dec 2025](https://millionrounds.com/company/nu-quantum) ## Quick answers about National Security Strategic Investment Fund (NSSIF) ### What does National Security Strategic Investment Fund (NSSIF) invest in? National Security Strategic Investment Fund (NSSIF) invests most often at Series A and Growth (67% of the rounds on record), in sectors such as Deep Tech, National Security and Defence. ### How active is National Security Strategic Investment Fund (NSSIF)? 6 investments on record, 5 of them in the last 12 months. The most recent was in Sept 2026. ### What has National Security Strategic Investment Fund (NSSIF) invested in recently? Its most recent investments on record: Open Cosmos (Growth, Sept 2026), Greenjets (Series A, Jul 2026) and Optera (Seed, Jun 2026). ### How big are National Security Strategic Investment Fund (NSSIF)'s cheques? The median round it joins is $50M. ### Does National Security Strategic Investment Fund (NSSIF) lead rounds? Rarely, if at all: none of its 6 investments on record names it as the lead. ### Where does National Security Strategic Investment Fund (NSSIF) invest? Most of the companies it backs are in the United Kingdom (67%), the United States (17%) and Portugal (17%). ### Is National Security Strategic Investment Fund (NSSIF) investing now? Yes: it is actively investing, with 5 investments in the last 12 months. ### Who does National Security Strategic Investment Fund (NSSIF) invest alongside? Most often Blackfinch Ventures (2 rounds together) and NATO Innovation Fund (NIF) (2 rounds together). ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=national-security-strategic-investment-fund-nssif) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=national-security-strategic-investment-fund-nssif)