DFX Intelligence

Mark Aaron Siegel

Managing Director, Managing Memberat Menlo Ventures· CA

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

Current roles: 3
Investments attributed: 3
Board seats: 3

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

What matters now

2016
since
Elected Manager at Menlo Ventures since 1 Apr 2016.
Tenure says how settled this partner is at the firm.
FactForm ADV Schedule A and the firm's team pageFor Founders, LPsRoles →

Relationship network

4 connected entities3 observed investment recordsinvestment records 2009 to 2017

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.

Mark Aaron Siegel

Managing Director, Managing Member

Reading the network

Organization
Company

›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.

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Which companies and boards is Mark Aaron Siegel connected to?

How am I connected?

Name your firm, a company or a person, and DFX finds the published routes to Mark Aaron Siegel: 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.

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Drawing the relationship network…

Roles

3 current, 0 past

Menlo Ventures Elected Manager
Apr 1, 2016 to present · “Schedule A: SIEGEL, MARK, AARON, ELECTED MANAGER, since 04/2016, ownership F, control person Y”
Fact Form ADV
Menlo Ventures Partner
Apr 1, 2016 to present · “Schedule A: SIEGEL, MARK, AARON, PARTNER, since 04/2016, ownership A, control person Y”
Fact Form ADV
Menlo Ventures Managing Director, Managing Member
Dec 1, 1998 to present · “Schedule A: SIEGEL, MARK, AARON, MANAGING DIRECTOR, MANAGING MEMBER, since 12/1998, ownership B, control person Y”
Fact Form ADV

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
Cofactor Genomics	Form D equity offering · $10.7M	Menlo Ventures	strongly supported · board	Jun 28, 2017	Inference sec.gov
Speeddate.com Inc	Form D equity offering · $3.0M	Menlo Ventures	strongly supported · board	Nov 21, 2011	Inference sec.gov
Schooner Information Technology	Form D equity offering · $20.0M	Menlo Ventures	strongly supported · board	Jul 30, 2009	Inference sec.gov

Board seats and vehicles

3 boards, 0 vehicles

Cofactor Genomics board seat on a deal Jun 28, 2017 Inference
Speeddate.com Inc board seat on a deal Nov 21, 2011 Inference
Schooner Information Technology board seat on a deal Jul 30, 2009 Inference

Timeline

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

Jun 28, 2017
Form D equity offering in Cofactor Genomics (Menlo Ventures)
Attributed investment Inference Cofactor Genomics Form D
Apr 1, 2016
Joined Menlo Ventures as Elected Manager
Role began Fact Menlo Ventures Form ADV
Nov 21, 2011
Form D equity offering in Speeddate.com Inc (Menlo Ventures)
Attributed investment Inference Speeddate.com Inc Form D
Jul 30, 2009
Form D equity offering in Schooner Information Technology (Menlo Ventures)
Attributed investment Inference Schooner Information Technology Form D
Dec 1, 1998
Joined Menlo Ventures as Managing Director, Managing Member
Role began Fact Menlo Ventures Form ADV