Cassandra Seier: The Finance Leader Behind Global NYSE Listings

Introduction

Cassandra Seier built a long career inside some of the biggest names in finance.

Her path started at Goldman Sachs. Later, she became Head of International Capital Markets at the New York Stock Exchange. She also spent years helping women build stronger careers in financial services.

Her work crossed continents. Singapore. London. New York. And many other markets.

She died on November 22, 2025. Goldman Sachs, the NYSE, Women in Financial Markets, and former colleagues later honored her work and professional influence.

Quick Facts

Fact	Details
Full Name	Cassandra Seier
Earlier Professional Name	Cassandra S. Tok
Profession	Finance and capital-markets executive
Known For	Head of International Capital Markets at NYSE
Former Employer	Goldman Sachs
Goldman Sachs Years	1996–2022
NYSE Role	Head of International Capital Markets
Education	BA in Finance, minor in Economics
University	University of Oregon
CFA Status	CFA charterholder since 2004
WIFM Position	President & CEO, 2019–2025
Husband	Thomas Seier
Children	One son
Date of Death	November 22, 2025

Education and Finance Training

Seier studied at the University of Oregon.

She earned a Bachelor of Arts in Finance with a minor in Economics, according to Women in Financial Markets.

She later earned another important finance credential.

She became a CFA charterholder in 2004.

That mix of formal finance study and professional training fit the work she later handled across trading, clearing, listings, and international markets.

Her career was already moving quickly.

Starting at Goldman Sachs

Seier joined Goldman Sachs in 1996.

Reuters reported that she began her career there as an operations specialist in Singapore. Her career with the bank eventually covered Singapore, New York, Jersey City, and London.

She stayed with Goldman for more than two decades.

Goldman Sachs records her employment period as 1996 to 2022. WIFM describes her Goldman tenure as lasting more than 24 years.

She moved through increasingly senior work.

One public record gives a clear career marker.

Goldman Sachs announced Cassandra Tok as part of its new Managing Director class in November 2013. Those promotions became effective on January 1, 2014.

Later professional profiles identify Cassandra Tok as Cassandra Seier.

Managing Director at Goldman Sachs

Near the end of her Goldman career, Seier worked as a Managing Director focused on futures and over-the-counter clearing.

That meant working in an area tied closely to institutional trading and the systems used to clear complex financial transactions.

Her work was international.

WIFM records that she worked from Goldman offices in Singapore, New York, and London. Goldman Sachs’ memorial page also lists Jersey City among locations connected with her career.

She left Goldman in 2022.

A new chapter followed.

Move to the New York Stock Exchange

Seier joined the New York Stock Exchange in 2022.

Her title was Head of International Capital Markets.

The job had a clear target: bring more international companies to the NYSE.

She worked with companies from Asia, Canada, Europe, the Middle East, Africa, and Latin America. She also advised private companies, private-equity firms, venture-capital firms, investment bankers, and other market participants considering a public listing.

The work involved IPO planning.

It also involved choosing an exchange.

For international companies, that choice can affect investor access, trading activity, market visibility, and future fundraising.

That put her close to major decisions.

What Did Cassandra Seier Do at the NYSE?

Her job went beyond finding companies.

She talked with businesses before their public-market plans were finished. She discussed IPO conditions, NYSE programs, listing options, and access to U.S. investors.

Basically, she worked at the point where private companies begin thinking seriously about public markets.

The NYSE’s international listings material continued to feature her work and interviews after her death. Its international listings page identifies her alongside coverage of overseas companies considering U.S. listings.

She appeared publicly too.

In 2025, NYSE media featured her discussing international capital markets during the KOOM Festival in New York.

Her reach was wide.

So was her schedule.

Her International Market Work

International listings were the main part of her NYSE role.

That required direct contact with founders, executives, investors, banks, and advisers across many countries.

The NYSE wanted overseas firms to consider New York.

Seier helped make that case.

Her work covered regions including Asia-Pacific, Europe, Canada, Latin America, the Middle East, and Africa.

She also wrote publicly about capital markets.

In an NYSE contribution to Naftika Chronika, she appeared under the title Head of International Capital Markets, New York Stock Exchange and discussed the long connection between the NYSE and the Greek shipping industry.

It was practical work.

Talk with companies. Explain the market. Build relationships. Keep conversations going.

FINRA Registration Record

Her regulatory history gives another view of her finance career.

FINRA’s BrokerCheck lists Cassandra S. Seier, CRD number 4402052, as previously registered with Goldman Sachs & Co. LLC from December 2001 until August 2022.

The report shows that she passed:

• Two principal or supervisory exams
• Four general industry or product exams
• One state securities-law exam

FINRA’s report also shows no disclosure events on her broker record.

That is a useful verified detail.

It gives a documented regulatory record alongside her corporate career.

Women in Financial Markets

Finance was only one part of her public work.

Seier spent years with Women in Financial Markets, commonly called WIFM.

She joined its board in 2012.

Then, in 2019, she became President and CEO.

At that time, the organization was growing beyond its original focus.

It had previously operated as Women in Derivatives.

In September 2023, the group changed its name to Women in Financial Markets. The change reflected a wider membership across financial services rather than derivatives alone. Seier was serving as President and CEO when the new identity was announced.

She stayed in the top role through 2025.

What Changed During Her WIFM Years?

WIFM credits Seier with helping build several of its programs.

These included its job site, WIFM Connect, its Wolfpack groups, its social-media work, and its annual gala.

The organization says its membership and social following grew at double-digit annual rates during her tenure.

Its activity also expanded in Europe and Asia.

Her focus was very people-based.

Careers mattered.

Mentoring mattered too.

The goal was to give women in finance more access to professional contacts, career opportunities, and support from people already working inside the industry.

WIFM Leadership Change in 2025

A leadership handover was announced in October 2025.

Karen Wares was appointed President and CEO.

Seier moved to the WIFM Advisory Council, where the organization planned for her to continue supporting its work.

The timing makes this part of her story especially sad.

Her death followed only weeks later.

WIFM’s current Advisory Council page lists her “In Loving Memory” and records her presidency as running from 2019 to 2025.

Husband and Family

Seier was married to Thomas Seier.

Public memorial reporting says they had one son.

Markets Media reported that she was survived by her husband and young son. Later NYSE-related posts showed her husband and son taking part in an Opening Bell ceremony held in her memory.

Her son’s private life does not need to become part of a professional profile.

So the useful public fact is simple.

She was a wife and mother.

Cassandra Seier’s Death

Goldman Sachs records her date of death as November 22, 2025.

Reuters reported the news on November 24, 2025.

An NYSE spokesperson confirmed that she had died during the weekend. The exchange did not disclose a cause of death to Reuters.

That distinction matters.

Some later reports discussed circumstances surrounding her death. Those accounts were not part of the official NYSE confirmation.

For that reason, they should not be stated as established fact without stronger official evidence.

How the NYSE Remembered Her

The reaction from colleagues was immediate.

Reuters reported comments from NYSE President Lynn Martin, who remembered Seier as highly focused on her work while still making time to support other people and mentor future leaders.

The NYSE continued honoring her in 2026.

Its media coverage of the 2026 Pride Summit included a segment remembering her as an LGBTQ+ ally.

Her professional story, then, did not stop with listings.

Mentoring became part of how colleagues remembered her.

The Cassandra Seier Scholarship

WIFM created a scholarship in her memory.

The Cassandra Seier Scholarship provides one $2,500 award, according to the organization’s current scholarship page.

It recognizes her work supporting women in financial services.

This gives her name a continuing link to education.

It also connects directly with the mentoring work that appeared throughout her WIFM years.

Her Career in Simple Terms

Seier spent almost three decades around financial markets.

First came Goldman Sachs.

Then came the NYSE.

Running beside both was her work with women in finance.

She understood institutional markets. She understood listings. And she spent a lot of time building professional relationships across countries.

That combination explains why her work reached well beyond one job title.

Final Thought

Cassandra Seier’s public career had a clear pattern.

She kept moving outward.

From operations to senior finance. From Goldman Sachs to the NYSE. From trading-related work to international listings. And from her own career to helping other women build theirs.

The verified record is already substantial.

There is no need to add guessed numbers about age, salary, or wealth.

Her documented work says enough.

She spent decades in global finance, became a senior NYSE executive, led Women in Financial Markets, and left behind programs that continue after her death.

Frequently Asked Questions

Who was Cassandra Seier?

She was a finance executive who served as Head of International Capital Markets at the New York Stock Exchange after a long career at Goldman Sachs.

Where did Cassandra Seier work before the NYSE?

She worked at Goldman Sachs from 1996 until 2022. Her career there included work in Singapore, New York, Jersey City, and London.

What was Cassandra Seier’s role at Goldman Sachs?

She became a Managing Director and later focused on futures and OTC clearing. Goldman Sachs included Cassandra Tok in its 2013 Managing Director promotion announcement.

What did she do at the NYSE?

She headed International Capital Markets. Her team worked with companies outside the United States considering NYSE listings and IPOs.

Where did Cassandra Seier study?

She earned a BA in Finance with a minor in Economics from the University of Oregon.

Was Cassandra Seier a CFA charterholder?

Yes. WIFM states that she had been a CFA charterholder since 2004.

Was Cassandra Seier married?

Yes. Public memorial reporting identifies Thomas Seier as her husband. The couple had one son.

When did Cassandra Seier die?

She died on November 22, 2025, according to Goldman Sachs. The NYSE confirmed her death to Reuters, but did not publicly disclose the cause.

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