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COMPANY RESEARCH · Investors & ecosystem

Ground State Ventures

Backs quantum technology startups at their earliest stages, with investments across computing, sensing, communications and infrastructure. Ground State Ventures is the current name of QDNL Participations, not a separate investor.

Official website ↗
Netherlands · Research reviewed 7 Sept 2026

Latest record: 1 evidence source added · axis ratings unchanged.

Review history 2 records

Record dates use UTC and show when an assessment or clarification was saved. Review dates show the evidence check. Earlier records were recovered from QubitWire’s source history; no earlier score movement is inferred.

  1. 1 evidence source added · axis ratings unchanged

    Assessment reviewed 6 Sept 2026 · Research reviewed 7 Sept 2026

    Open this evidence record →

    What changed
    Research brief
    Previously

    None recorded

    Now

    Initial technology, access and evidence brief

    Evidence sources
    Sources added (1)
    Sources in this record (4)
Identity & attribution
Organization record
Ground State Ventures (organization-193)
Recorded role
Specialist early-stage quantum venture capital
Recorded aliases
QDNL Participations
Name and period
Formerly QDNL Participations. Renamed Ground State Ventures in April 2026; this is the same organization, not a second entry.
Product scope
Specialist venture funding and company-building support

A company profile may discuss several systems. Capabilities remain attached to the product and conditions named in each source; they do not transfer automatically to related organizations. A verified security relationship has not been attached to this record.

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TECHNOLOGY & ACCESS

What it does. Where it fits.

Specialist venture funding and company-building support

Who should look closer

Early quantum founders seeking a specialist first investor, and readers following the emerging component and infrastructure companies behind the larger hardware platforms.

QubitWire’s editorial assessment of practical fit.

Explore the firm and portfolio

The official site describes its investment focus and supplies a contact route for founders. Funding follows investor selection and is not an open-access service.

Check the current access route ↗
DOCUMENTED EVIDENCE

What the sources establish

Rhonexum confirms that QDNL Participations led the equity investment within its $1 million pre-seed financing announced in March 2026. The investor's April announcement confirms the Ground State Ventures rebrand and says its fund had reached $88 million while approaching final close.

rhonexum.com ↗gsv.vc ↗

What remains unresolved

The cited April update does not confirm a completed final fund close. A funded company or announced portfolio valuation does not establish realized investment returns or delivered technical performance.

The next question to watch

Can new portfolio companies document delivered products and customer adoption, and is a completed final fund close subsequently confirmed by the firm?

A research question, not a promised milestone.

QubitWire coverage

No published QubitWire stories currently match this organization. The evidence sources below provide the starting point.

Open research questions

Editorial questions for this profile. No reviewed closure decision has been recorded; unanswered questions do not lower the official score.

Open research question

Can new portfolio companies document delivered products and customer adoption, and is a completed final fund close subsequently confirmed by the firm?

What evidence would help

A source addressing this question must identify the named system, experiment or deployment, its conditions, measured outcome and remaining limitations. Do named recipients confirm the support or program outcome?

What would resolve it?

An editorial review must explain which part of this question the evidence resolves. A roadmap or an announcement alone does not close it.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Which named system or service can I use under the documented access route?

What evidence would help

Check the current terms for explore the firm and portfolio. Identify the system version, eligibility, restrictions and whether the result used hardware or simulation.

What would resolve it?

Current primary documentation must identify the offering, eligible user and access conditions. An unspecified company-level access claim is insufficient.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Does the organization support your stage, geography and technology?

What evidence would help

Provide the source location, relevant product or generation, workload, resource constraints and reported uncertainty. Keep measurements, simulations and announced targets distinct.

What would resolve it?

A source reviewer must map the evidence to this exact scope. Missing disclosure remains unknown; it is not technical failure.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence

Questions are drawn from the existing brief and sector reading guide. Research brief reviewed 7 Sept 2026. Following stores a local bookmark; it does not send email alerts or imply a scheduled review.

Since your review

Scope: Ground State Ventures. Reading a page never marks its records reviewed.

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Existing material records remain available after setup. Routine rechecks and initial entries are excluded from material counts.

Public 7-day, 30-day & full history →

From claim to assessment

These are the existing assessment claims and their recorded criterion links. A source link is not an independent replication. New research does not change these published ratings automatically.

Source references in method 1.0 · assessment reviewed 6 Sept 2026
Recorded claim & sourceAssessment linkageProvenance & limits
Source 1

Confirms the rebrand, $88 million raised while approaching final close, and named Dutch and international early-stage investments.

We've changed our name: QDNL Participations is now Ground State Ventures ↗Published 28 Apr 2026
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Support availability

The current specialist venture offering describes funding and commercial support.

Network contribution

Named portfolio and recipient relationships establish a support network; broader maintained partnership programs are not established.

Published rating inputs remain unchanged.		Organization-originated source

Source type: official. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 6 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Source 2

Rhonexum confirms $1 million pre-seed funding led by equity investment from QDNL Participations; first product commercialization is a planned use of funds.

Rhonexum secures $1 million to miniaturize quantum computing with cryogenic electronics ↗Published 18 Mar 2026
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Execution

Rhonexum confirms an executed financing led by the organization under its previous name.

Ecosystem outcomes

A named recipient confirms funding support; subsequent company success and investor returns are not inferred.

Network contribution

Named portfolio and recipient relationships establish a support network; broader maintained partnership programs are not established.

Published rating inputs remain unchanged.		External source; collaborators may be involved

Source type: customer. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 6 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Source 3

Legacy official site explicitly identifies the new Ground State Ventures name and describes funding and commercial support for quantum founders.

QDNL Participations ↗Published Not recorded
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Support availability

The current specialist venture offering describes funding and commercial support.

Published rating inputs remain unchanged.		Organization-originated source

Source type: official. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 6 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Revision and evidence-family boundaries

Record reference: 54f5622477eefacc8ac246055b5db90b647db5df6af1eca218e65fc666078443. Read prior recorded revisions.

Repeated coverage can describe the same experiment. The assessment does not contain a reviewed claim-family grouping, so the number of links is never shown as a replication count. Source pages can change independently of this saved assessment; the original source text is not archived here.

CHECK THE ORIGINALS

Sources & evidence

  1. We've changed our name: QDNL Participations is now Ground State Ventures ↗Organization-originated source · 28 Apr 2026

    Confirms the rebrand, $88 million raised while approaching final close, and named Dutch and international early-stage investments.

  2. Rhonexum secures $1 million to miniaturize quantum computing with cryogenic electronics ↗External source (may be a collaborator) · 18 Mar 2026

    Rhonexum confirms $1 million pre-seed funding led by equity investment from QDNL Participations; first product commercialization is a planned use of funds.

  3. QDNL Participations ↗Organization-originated source · Publication date not stated

    Legacy official site explicitly identifies the new Ground State Ventures name and describes funding and commercial support for quantum founders.

  4. Ground State Ventures official website ↗official · Publication date not stated

    The current website describes support from the earliest stages, investment across computing, sensing, communications and infrastructure, and a public founder contact route.

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