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Alex Finkelstein

Director and 10% owner at Flywire. Also a director at Wunderite and Mark43 and an executive officer and director at Spark Capital.

InvestorDirectorPublic companyRoles at 2 startupsSpark Capital
Updated Nov 9, 2026·Latest SEC filing Aug 4, 2026·Suggest an edit

About Alex Finkelstein

Alex Finkelstein is a director and 10% owner at Flywire.

Form D filings name Alex Finkelstein as a director at Wunderite and Mark43.

Alex Finkelstein reports to the SEC as a director or major shareholder of 2 public companies, including Wayfair (W).

Alex Finkelstein appears on fund filings for Spark Capital.

Alex Finkelstein first appears on SEC filings in 2010.

Experience

This experience comes from SEC filings. The years are when the filings name Alex Finkelstein in the role, so the role may have started earlier or lasted longer.

Spark Capital
Executive officer and director
2010 – 2026 · Fund filings for 23 funds
Flywire Corp
Director and 10% owner
2021 – 2026 · Public company (FLYW)
Wunderite, Inc.
Director
2023 – 2025 · Bourne, MA
Mark43, Inc.
Director
2013 – 2024 · New York, NY
Wayfair Inc.
Director and 10% owner
2014 – 2015 · Public company (W)

Key Colleagues at Startups

The people Alex Finkelstein works with at each company, as listed on that company's latest Form D.

Wunderite, Inc. · Form D, May 14, 2025
DP
David Pope
Director
PM
Peter MacDonald
President and director
JS
Mark43, Inc. · Form D, May 31, 2024
LB
Larry Bohn
Director
SC
Scott Crouch
Executive officer and director
MP
Matthew Polega
President, Treasurer and Secretary
RH
Robert Hughes
Chief Executive Officer and director
BS
JS
Jd Sherman
Director

Sources

  1. SECWunderite, Inc. Form D, filed May 14, 2025
  2. SECMark43, Inc. Form D, filed May 31, 2024
  3. SECForms 3, 4 and 5 filed by Alex Finkelstein (SEC filer 1620153)