DFX Intelligence

William Porteous

Role unknown· Vienna, VA

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

Current roles: 0
Investments attributed: 0
Board seats: 2

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

2 boards
seats on record
Sits on 2 boards on record, the latest Spire Global on 20 Apr 2026.
Board seats show where this partner holds governance, not only a cheque.
FactForm D directors and board-seat attributionsFor Founders, co-investorsBoard seats →

Relationship network

2 connected entities

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.

William Porteous

Reading the network

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 William Porteous connected to?

How am I connected?

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

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Drawing the relationship network…

Roles

0 current, 0 past

Investments attributed to this person

No investment attributed yet. Attribution needs a source naming this person on the deal: a quote, a board seat, a portfolio page credit.

Board seats and vehicles

2 boards, 0 vehicles

Spire Global, Inc. Director Apr 20, 2026 Fact
HyperSpectral Corp. Director Oct 15, 2025 Fact

Timeline

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

No dated event, deal or role on record.