DFX Intelligence

Jonathan D Root

Managing Memberat U.S. Venture Partners· CA

As of 2026-09-23 · this person's identity; each section below carries its own date

Current roles: 2
Investments attributed: 25
Board seats: 9

Ask DFX about this View relationships Find contacts Investments Board seats

As of 2026-09-23 · this person's identity; each section below carries its own date

11 additional roles and seats, 22 additional attributed investments

Every relationship, signal and contact on this record, with the source on each.

Includes 3 days of DFX Intelligence. Then $199/month unless canceled.

What matters now

1 deal
12 months
1 investment attributed in the last 12 months;
A partner with a recent deal is actively writing cheques now.
Factfunding announcements and Form D naming the personFor Founders, co-investorsInvestments →

Relationship network

18 connected entities25 observed investment records14 dated investment records shown here, 2016 to 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.

Some relationships on this record are counted rather than named here. They open with the full profile.

Click any name or line for the investment records and sources behind it. Line weight is investment records together; dashed lines are inferred.

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 Jonathan D Root connected to?

How am I connected?

Name your firm, a company or a person, and DFX finds the published routes to Jonathan D Root: 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 Jonathan D Root

Includes 3 days of DFX Intelligence. Then $199/month unless canceled.

Drawing the relationship network…

Roles

1 current, 0 past

U.S. Venture Partners Managing Member
Nov 1, 2004 to present · “Schedule A: ROOT, JONATHAN, D, MANAGING MEMBER, since 11/2004, ownership B, control person Y”
Fact Form ADV

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
Okami Medical, Inc.	Form D equity offering · $28.9M	U.S. Venture Partners	strongly supported · board	Dec 1, 2025	Inference sec.gov
Sparrow Pharmaceuticals, Inc.	Form D equity offering · $61.8M	U.S. Venture Partners	strongly supported · board	Jul 1, 2025	Inference sec.gov
Okami Medical, Inc.	Form D equity offering · $18.6M	U.S. Venture Partners	strongly supported · board	Sep 6, 2024	Inference sec.gov

Board seats and vehicles

9 boards, 8 vehicles

Okami Medical, Inc. board seat on a deal Dec 1, 2025 Inference
Sparrow Pharmaceuticals, Inc. board seat on a deal Jul 1, 2025 Inference
Route 92 Medical, Inc. board seat on a deal Jul 12, 2024 Inference
U.S. Venture Partners XIV, L.P. Executive Officer Jul 31, 2026
U.S. Venture Partners Xi, L.P. Executive Officer Sep 19, 2014
U.S. Venture Partners Xii, L.P. Executive Officer Mar 28, 2018

Timeline

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

Dec 1, 2025
Form D equity offering in Okami Medical, Inc. (U.S. Venture Partners)
Attributed investment Inference Okami Medical, Inc. Form D
Jul 1, 2025
Form D equity offering in Sparrow Pharmaceuticals, Inc. (U.S. Venture Partners)
Attributed investment Inference Sparrow Pharmaceuticals, Inc. Form D
Sep 6, 2024
Form D equity offering in Okami Medical, Inc. (U.S. Venture Partners)
Attributed investment Inference Okami Medical, Inc. Form D
Nov 1, 2004
Joined U.S. Venture Partners as Managing Member
Role began Fact U.S. Venture Partners Form ADV