DFX Intelligence

Jack Altman

General Partnerat Benchmark

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

Current roles: 3
Investments attributed: 3
Board seats: 2

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

4 additional roles and seats

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

3 deals
12 months
3 investments attributed in the last 12 months; latest Antares Nuclear round on 18 Aug 2026.
A partner with a recent deal is actively writing cheques now.
Factfunding announcements and Form D naming the personFor Founders, co-investorsInvestments →
2 boards
seats on record
Sits on 2 boards on record, the latest Antares Nuclear on 18 Aug 2026.
Board seats show where this partner holds governance, not only a cheque.
InferenceForm D directors and board-seat attributionsFor Founders, co-investorsBoard seats →

Relationship network

13 connected entities3 observed investment recordsinvestment records 2026

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 Jack Altman connected to?

How am I connected?

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

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

Drawing the relationship network…

Roles

3 current, 0 past

Altman Capital Management, LLC Managing Director
Jan 1, 2021 to present · “Schedule A: ALTMAN, JACK, MANAGING DIRECTOR, since 01/2021, ownership E, control person Y”
Fact Form ADV
Hydrazine Capital GP, LLC Member Of Hydrazine Capital Gp, Llc
Apr 1, 2012 to present · “Schedule A: ALTMAN, JACK, MEMBER OF HYDRAZINE CAPITAL GP, LLC, since 04/2012, ownership A, control person Y”
Fact Form ADV
Benchmark General Partner
? to present · “said Jack Altman, General Partner at Benchmark.”
Fact Press release

Investments attributed to this person

Company	Round	Investor	Attribution	Date	Source
Antares Nuclear, Inc.	board only	Hydrazine Capital GP, LLC	strongly supported · board	Aug 18, 2026	Inference sec.gov
Monaco	Series B · $50.0M · Series B	Benchmark	confirmed	May 12, 2026	Fact globenewswire.com
Copilot Labs, Inc. \ DE	board only	Hydrazine Capital GP, LLC	strongly supported · board	Jan 23, 2026	Inference sec.gov

Board seats and vehicles

2 boards, 7 vehicles

Antares Nuclear, Inc. Director Aug 18, 2026 Inference
Copilot Labs, Inc. \ DE Director Jan 23, 2026 Inference
ALT Capital I, L.P. Director Feb 7, 2024
Jack Altman Fund, L.P. Director Dec 31, 2020
Jack Altman Holdings I, L.P. Director Apr 13, 2021

Timeline

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

Aug 18, 2026
Board seat at Antares Nuclear, Inc. (Hydrazine Capital GP, LLC)
Board seat Inference Antares Nuclear, Inc. Form D
May 12, 2026
Series B in Monaco (Benchmark)
Attributed investment Fact Monaco Press release
Jan 23, 2026
Board seat at Copilot Labs, Inc. \ DE (Hydrazine Capital GP, LLC)
Board seat Inference Copilot Labs, Inc. \ DE Form D
Jan 1, 2021
Joined Altman Capital Management, LLC as Managing Director
Role began Fact Altman Capital Management, LLC Form ADV
Apr 1, 2012
Joined Hydrazine Capital GP, LLC as Member Of Hydrazine Capital Gp, Llc
Role began Fact Hydrazine Capital GP, LLC Form ADV