DFX Intelligence

Dennis Costello

Managing Member;Tmv Managing Memberat Triathlon Medical Venture Partners LLC· OH

As of 2026-09-12 · this person's identity; each section below carries its own date

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

Ask DFX about this View relationships Find contacts Investments Board seats

As of 2026-09-12 · this person's identity; each section below carries its own date

What matters now

2003
since
Managing Member;Tmv Managing Member at Triathlon Medical Venture Partners LLC since 1 Mar 2003.
Tenure says how settled this partner is at the firm.
FactForm ADV Schedule A and the firm's team pageFor Founders, LPsRoles →

Relationship network

2 connected entities1 observed investment recordinvestment records 2009

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.

Dennis Costello

Managing Member;Tmv 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.

Ask DFX about this network

Which companies and boards is Dennis Costello connected to?

How am I connected?

Name your firm, a company or a person, and DFX finds the published routes to Dennis Costello: 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 Dennis Costello

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

Drawing the relationship network…

Roles

1 current, 0 past

Triathlon Medical Venture Partners LLC Managing Member;Tmv Managing Member
Mar 1, 2003 to present · “Schedule A: COSTELLO, DENNIS, MANAGING MEMBER;TMV MANAGING MEMBER, since 03/2003, ownership C, control person Y”
Fact Form ADV

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
CardioPolymers, Inc.	Form D equity offering · $13.6M	Triathlon Medical Venture Partners LLC	strongly supported · board	Jul 22, 2009	Inference sec.gov

Board seats and vehicles

1 board, 0 vehicles

CardioPolymers, Inc. board seat on a deal Jul 22, 2009 Inference

Timeline

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

Jul 22, 2009
Form D equity offering in CardioPolymers, Inc. (Triathlon Medical Venture Partners LLC)
Attributed investment Inference CardioPolymers, Inc. Form D
Mar 1, 2003
Joined Triathlon Medical Venture Partners LLC as Managing Member;Tmv Managing Member
Role began Fact Triathlon Medical Venture Partners LLC Form ADV