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Serra-de Estrela Investments Ltd | RoundOS

01 · Free data roomBuild, share and track important documents.

Data room analytics Document Analytics Pitch Deck Tracking Secure sharing Permissions NDA & agreements Watermarking Versions Branding

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Startups Venture capital M&A data room Investor relations

Beyond fundraising

Sales deals Board documents Due diligence Real estate

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Fundraising hub Pre-seed Seed Series A

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Blog Funding Customer stories Investor room template

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SAFE, dilution, runway, pipeline coverage, investor fit.

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Serra-de Estrela Investments Ltd

Activity from announced rounds

Activity in this selection View all activity

Activity in this selectionUnited States · Aug 31, 2026 · Aug 1, 2026

Rounds participated in: 1
Confirmed lead rounds: —
New companies: 1
Funding in participating rounds: —

By stage

Undisclosed1

By primary sector

Defense tech1

By country

United States1

Rounds

1 in this selection

Aug 4

Isengard Industries

Builds precision strike and counter-UAS systems for allied militaries

UndisclosedStrategic

Role not disclosed

1–1 of 1

Most frequent co-investors

A3 Management Group1 shared Backswing Ventures1 shared Sterling Road1 shared Y Combinator (YC)1 shared

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RoundOS

A free data room for modern deals, with an AI operator that runs the fundraise.

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01 · Explore

Data Room AI Fundraising CRM Pricing Security Document Analytics Pitch Deck Tracking

02 · Data Room

Data room analytics Secure document sharing Data room permissions NDA & agreements Dynamic watermarking Document versions Custom branding

03 · Operator

Fundraising hub Pre-seed fundraising Seed fundraising Series A fundraising Fundraising follow-up Investor research Investor updates Integrations

04 · Use cases

Startup data room VC and LP data room M&A data room

Due diligence data room

Investor relations

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Board documents

Real estate data room

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All free tools SAFE calculator Dilution calculator Runway calculator Pipeline coverage Investor fit checker Follow-up generator Round leak audit

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