DFX Intelligence

Robert Nelsen

Managing Partnerat Arch Venture Partners· Seattle, WA

As of 2026-10-01 · this person's identity; each section below carries its own date

Current roles: 2
Investments attributed: 1
Board seats: 1

Ask DFX about this View relationships Find contacts Investments Board seats

As of 2026-10-01 · this person's identity; each section below carries its own date

What matters now

1 deal
12 months
1 investment attributed in the last 12 months; latest Paradigm Health Series B ($78M) on 4 Dec 2025.
A partner with a recent deal is actively writing cheques now.
Factfunding announcements and Form D naming the personFor Founders, co-investorsInvestments →
Moved
role ended
Left Arch Venture Partners (Co-founder & Managing Director) on 30 Sep 2026.
A partner who moved takes relationships and deal flow to the next firm.
FactForm ADV Schedule A and team pagesFor Founders, recruiters, LPsRoles →

Relationship network

4 connected entities1 observed investment recordinvestment records 2025

From the roles sources name this person in, the investments a source attributes to them, and the boards and funds Form D names them on.

Robert Nelsen

Managing Partner

Reading the network

Organization
Company
Fund or vehicle

›How strength and recency are read

Venture relationships are not scored. Each line names its claim: a round led or joined, a board seat or a filing that names the firm, a listing on a portfolio page (dated by when DFX saw it, never by when the investment was made), a disclosed LP commitment, or a co-investor pair counted from observed participations. Observed means a named source says so; Derived means DFX counted it from observed rows; Inferred means a match that may be wrong.

Darker lines were active in the last 24 months or are current; lighter lines are older or undated.

Ask DFX about this network

Which companies and boards is Robert Nelsen connected to?

How am I connected?

Name your firm, a company or a person, and DFX finds the published routes to Robert Nelsen: a shared portfolio company or board, a prior employer, a co-investor, a shared LP or service provider. Every step is a filed or published record with its source; none is a guess about who knows whom.

See how you connect to Robert Nelsen

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Drawing the relationship network…

Roles

2 current, 1 past

Arch Venture Partners Co-founder & Managing Director
? to present · “team page: Robert Nelsen / Co-founder & Managing Director”
Fact Firm website
Arch Venture Partners Managing Partner
? to present · “said Robert Nelsen, Managing Partner at ARCH Venture Partners and Paradigm Health Co-Founder and Board Chair.”
Fact Press release
Arch Venture Partners Co-founder & Managing Director
? to Sep 30, 2026 · “was on the team page; absent on 2026-09-30”
Inference Firm website

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
Paradigm Health	Series B · $78.0M · Series B	Arch Venture Partners	confirmed	Dec 4, 2025	Fact prnewswire.com

Board seats and vehicles

1 board, 1 vehicle

RIPPL Care, Inc. Director Oct 16, 2024 Fact
Arch Venture Fund Viii Overage LP Executive Officer Mar 6, 2015

Timeline

2 dated entries: events, attributed deals, board seats and role changes

Sep 30, 2026
Left Arch Venture Partners as Co-founder & Managing Director
Role ended Inference Arch Venture Partners Firm website
Dec 4, 2025
Series B in Paradigm Health (Arch Venture Partners)
Attributed investment Fact Paradigm Health Press release

Record history

3 identity changes, 1 dated event on the change ledger, latest event first

Merged in
2026-10-01
Event retracted
2026-10-01
Merged in
2026-09-30

+1 more change on this record's ledger

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The ledger records every merge, rename and reclassification this record went through and the dated filings observed on it, so the identity on this page can be traced to the records it was built from. The ledger's own sentences name other records, so they show with the names.