DFX Intelligence

Stan Reiss

Executive Officerat Matrix Partners· MA

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

Current roles: 2
Investments attributed: 10
Board seats: 4

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

1 additional role or seat, 7 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.

Nothing material in the last 365 days. Last change: 26 Feb 2019, Latest Lightmatter Form D equity offering ($22.2M) on 26 Feb 2019.

Relationship network

5 connected entities10 observed investment records9 dated investment records shown here, 2009 to 2019

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.

Stan Reiss

Executive Officer

1 more attributed investment on this record

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

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 Stan Reiss connected to?

How am I connected?

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

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

Drawing the relationship network…

Roles

1 current, 0 past

Matrix Partners Executive Officer
Jun 1, 2002 to present · “Schedule A: REISS, STAN, EXECUTIVE OFFICER, since 06/2002, ownership NA, control person Y”
Fact Form ADV

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
Lightmatter, Inc.	Form D equity offering · $22.2M	Matrix Partners	strongly supported · board	Feb 26, 2019	Inference sec.gov
Qualtre Inc	Form D equity offering · $9.0M	Matrix Partners	strongly supported · board	Dec 22, 2014	Inference sec.gov
Qualtre Inc	Form D equity offering · $8.0M	Matrix Partners	strongly supported · board	Mar 19, 2014	Inference sec.gov

Board seats and vehicles

4 boards, 0 vehicles

Lightmatter, Inc. board seat on a deal Feb 26, 2019 Inference
Qualtre Inc board seat on a deal Dec 22, 2014 Inference
Xtalic board seat on a deal Jan 21, 2011 Inference

Timeline

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

Feb 26, 2019
Form D equity offering in Lightmatter, Inc. (Matrix Partners)
Attributed investment Inference Lightmatter, Inc. Form D
Dec 22, 2014
Form D equity offering in Qualtre Inc (Matrix Partners)
Attributed investment Inference Qualtre Inc Form D
Mar 19, 2014
Form D equity offering in Qualtre Inc (Matrix Partners)
Attributed investment Inference Qualtre Inc Form D
Jun 1, 2002
Stan Reiss joined Schedule A of Matrix Partners as Executive Officer
Person joined Fact Matrix Partners Form ADV
Jun 1, 2002
Joined Matrix Partners as Executive Officer
Role began Fact Matrix Partners Form ADV

Record history

1 dated event on the change ledger, latest event first

Person joined
2002-06-01source on record

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.