Cassandra Seier, NYSE Head of International Capital Markets, Dies at 49 in Reported Bike Accident in the Bahamas

Cassandra Seier, the head of international capital markets at the New York Stock Exchange, died over the weekend at age 49, the NYSE confirmed Monday. While the company did not disclose an official cause of death, reports indicate Seier died in a bike accident in the Exuma district of the Bahamas.

Seier was widely respected across Wall Street for her leadership, global expertise, and long-standing dedication to expanding international market access. Before joining the NYSE in 2022, she spent more than 23 years at Goldman Sachs, beginning her career there in 1996 as an operations specialist and ultimately becoming a key figure in capital markets.

A Global Markets Leader

At the NYSE, Seier played a central role in attracting foreign issuers and strengthening the exchange’s international footprint—a function considered critical to the NYSE’s competitive position and revenue strategy. Her work connected global companies with the U.S. capital markets, advancing the exchange’s reach during a time of intense global competition.

The NYSE expressed its grief in a statement, writing:
“We are devastated by the news that our colleague Cassandra Seier passed away over the weekend. An integral leader at 11 Wall, Cassandra made an immeasurable impact—not only through her expertise but through her generosity as a mentor, colleague, partner, and friend.”

Advocate for Women in Finance

Beyond her corporate leadership, Seier was a prominent advocate for women in the financial sector. She served as CEO and president of Women in Financial Markets, a nonprofit dedicated to supporting and advancing women’s careers in finance. Her advocacy extended through mentorship, education, and leadership development—areas in which colleagues say she excelled.

Cassandra Seier, NYSE Head of International Capital Markets, Dies at 49 in Reported Bike Accident in the Bahamas

A University of Oregon Lundquist College of Business graduate and CFA charterholder since 2004, Seier was regarded as one of the most influential women in a sector where female leadership remains limited.

NYSE President Lynn Martin honored her in a LinkedIn tribute, writing:
“She was someone who was laser focused on getting a job done but always found time to offer anyone support and to mentor the next generation of leaders.”

Wall Street Mourns a Respected Voice

Tributes across social media and within the financial community have highlighted her distinguished career, her mentorship, and her impact on global capital markets. Colleagues described her as a generous leader who combined deep expertise with a commitment to uplifting others.

As the finance community continues to mourn her sudden loss, Seier is being remembered not only for her professional achievements but for the warmth and leadership she brought to every role.