Obsidian Security Funding: $100M Raised, Series C

Obsidian Security is based in Waltham. It has raised $100M in total funding. Latest round: Series C. Backed by IVP, Norwest, GV.

Obsidian Security funding overview

Obsidian Security is based in Waltham. Obsidian Security has raised $100M in total disclosed funding. That places its disclosed total in the $25M–$100M range. Its most recent disclosed round is a Series C. Investors on record include IVP, Norwest, GV, Greylock Partners. 4 distinct backers are named across the disclosed rounds.

Obsidian Security at a glance

Total raised
$100M
Latest round
Series C
Headquarters
Waltham
Notable investors
IVP, Norwest, GV, Greylock Partners

Frequently asked about Obsidian Security funding

How much has Obsidian Security raised?
Obsidian Security has raised $100M in total disclosed funding across the rounds on record.
Who has invested in Obsidian Security?
IVP, Norwest, GV, Greylock Partners are named among the investors backing Obsidian Security.
What was the latest Obsidian Security funding round?
The most recent disclosed round is a Series C.
Where is Obsidian Security based?
Obsidian Security is based in Waltham.

Round data for Obsidian Security is compiled from public filings and announcements; blank fields mean nothing has been disclosed rather than nothing exists. Continue with the companies in Waltham and backer lists below.

Obsidian Security funding history

2 disclosed rounds on record, including 1 reported through SEC Form D filings.

  1. Filed August 2026 — Private financing. $81.5M sold of a $109.9M offering. 22 investors reported. SEC Form D filing
  2. Date undisclosed — Series C. $90M.

SEC Form D filings report the amount sold against a stated offering size, which can differ from press-reported round totals, and they do not name the round — those entries appear as Private financing.

Companies related to Obsidian Security (36)

Browse related funding lists (6)

Company funding database · Investor directory · Founder database · Mega-rounds 2026

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