• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
NewslettersBroadsheet

How Thailand’s 2004 tsunami inspired one VC to raise a $50 million fund to invest in sustainability 

By
Emma Hinchliffe
Emma Hinchliffe
and
Joey Abrams
Joey Abrams
Down Arrow Button Icon
By
Emma Hinchliffe
Emma Hinchliffe
and
Joey Abrams
Joey Abrams
Down Arrow Button Icon
February 27, 2024, 9:07 AM ET
Sita Chantramonklasri, founder of Siam Capital.
Sita Chantramonklasri, founder of Siam Capital. Horacio Villalobos—Getty Images

Good morning, Broadsheet readers! The widow of an early Berkshire Hathaway investor donated $1 billion to the Albert Einstein College of Medicine, Warner Bros. woos back J.K. Rowling, and living through Thailand’s 2004 tsunami inspired one VC’s investment thesis. Have a thoughtful Tuesday.

– Sustainable investing. Sita Chantramonklasri “remember[s] every minute” of December 26, 2004. She was 12 years old, a student at a Bangkok international school. The Boxing Day tsunami that hit Thailand that day—and the uneven recovery that divided the “haves and have-nots”—is seared in her memory.

“We started hearing warnings all over the news and radio. I looked up what ‘tsunami’ even meant exactly,” Chantramonklasri remembers. Her typical drive to school passed high-rise apartments and brothels, and she saw how the privileged fared better in the disaster’s aftermath. “I didn’t understand how something could be so catastrophic that it could wipe away communities in an instant,” she says.

Today, Chantramonklasri is a New York-based investor behind the firm Siam Capital. Her firm invests in companies at the intersection of sustainability and consumer infrastructure—and her experiences growing up in Thailand informed that investment thesis. “I realized the vast impact of climate events, not just on the natural landscape, but on people,” she says. In addition to her experience in 2004, Chantramonklasri spent her youth observing her father’s work in the energy sector, visiting both oil rigs and solar farms.

Sita Chantramonklasri, founder of Siam Capital.
Horacio Villalobos—Getty Images

As a solo GP, she raised almost $50 million for her firm’s first fund; the firm has deployed $43.8 million of that capital. Its investments include the biotech company Helaina (which started as an infant nutrition startup), the product development marketplace Novi, and the food and beverage brand platform Tomorrow Farms. Her second vehicle now counts Kasikorn Bank, one of Thailand’s largest banks, as an investor.

An Uber and Goldman Sachs alum, she founded her own firm after working for Twitter cofounder Biz Stone’s VC firm Future Positive. She identified sustainability as her interest and refined a thesis. “It felt like people investing in sustainability were working at it from a nonprofit lens,” she says. She wanted to invest for long-term returns. Her answer was a consumer focus; her fund has backed startups that build an “infrastructure layer” to help companies meet demand as consumer habits change because of environmental and economic pressures. What people buy, how they spend their time, and what services they use will all be affected by the future of the planet, she argues.

Chantramonklasri doesn’t consider Siam to be a climate tech firm, and she cautions others in the space to move deliberately. “There’s almost an urgency to deploy solutions,” she says. “I’m scared we’re starting to see technologies being funded that aren’t necessarily the best ideas for venture funding. A lot of these ideas need to exist, but not all of them can generate venture-like returns.”

Emma Hinchliffe
emma.hinchliffe@fortune.com
@_emmahinchliffe

The Broadsheet is Fortune’s newsletter for and about the world’s most powerful women. Today’s edition was curated by Joseph Abrams. Subscribe here.

ALSO IN THE HEADLINES

- Free for all. A former pediatrics professor and current trustee at the Bronx’s Albert Einstein College of Medicine donated $1 billion to the school to ensure free tuition for all future students. The donation from Ruth Gottesman, the widow of an early Berkshire Hathaway investor, will be used to “attract a talented and diverse pool of individuals who may not otherwise have the means to pursue a medical education,” the school said. Fortune

- Rowling returns. Warner Bros. CEO David Zaslav took it upon himself to woo Harry Potter author J.K. Rowling back to the studio after it distanced itself from her following controversial remarks about the transgender community. With Rowling now involved in an upcoming Harry Potter TV series, the studio seems ready to reconcile with the author who wields enormous power over the IP of the series she created. Wall Street Journal

- A league of their own. The inaugural season of what is believed to be the first professional softball league in Latin America is underway, reflecting the growing popularity of women’s sports in the region. The Mexico-based league is already drawing tens of thousands of spectators to watch female players who previously had to leave the country to compete professionally. The New York Times

- Hello lifeline. Candle Media has hired investment bank Moelis & Co. to revive Hello Sunshine, the women-centered media company founded by Reese Witherspoon. Sources say the bank is focused on expansion after Hello Sunshine fell short of the $80 million in profits it projected last year. Puck

- Racing from restrictions. Women in Alabama are rushing to move their frozen embryos out of state after an Alabama Supreme Court ruling threatened in vitro fertilization there last week. Transport is expensive and risks the viability of the embryos many women believe to be their last hope of a pregnancy. The Cut

MOVERS AND SHAKERS: Walgreens Boots Alliance hired Lanesha Minnix as executive vice president and global chief legal officer. Supergoop! named former JLo Beauty CEO Lisa Sequino as its new chief executive officer.

ON MY RADAR

Fran Drescher on what’s lost when Hollywood’s so beholden to shareholders Vanity Fair

Mindy Kaling on egg freezing and advice from Oprah The Wall Street Journal

One of the last abortion doctors in Indiana The New Yorker

PARTING WORDS

"I don’t know why our ability to connect with people all around the world hasn’t translated yet to more global kindness."

—Activist and writer Monica Lewinsky, the face of a new Reformation campaign, on the internet's ability to both isolate and connect people

This is the web version of The Broadsheet, a daily newsletter for and about the world’s most powerful women. Sign up to get it delivered free to your inbox.

About the Authors
Emma Hinchliffe
By Emma HinchliffeMost Powerful Women Editor
LinkedIn iconTwitter icon

Emma Hinchliffe is Fortune’s Most Powerful Women editor, overseeing editorial for the longstanding franchise. As a senior writer at Fortune, Emma has covered women in business and gender-lens news across business, politics, and culture. She is the lead author of the Most Powerful Women Daily newsletter (formerly the Broadsheet), Fortune’s daily missive for and about the women leading the business world.

See full bioRight Arrow Button Icon
By Joey AbramsAssociate Production Editor

Joey Abrams is the associate production editor at Fortune.

See full bioRight Arrow Button Icon

Latest in Newsletters

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Newsletters

OpenAI cofounder and president Greg Brockman (left) and cofounder and CEO Sam Altman (right) dressed in suits and walking through the lobby of a court house.
NewslettersEye on AI
Musk’s court fight against OpenAI produces more heat than light on the control of advanced AI
By Jeremy KahnMay 5, 2026
6 hours ago
Women’s sports is booming—but a new divide is taking shape
NewslettersMPW Daily
Women’s sports is booming—but a new divide is taking shape
By Emma HinchliffeMay 5, 2026
11 hours ago
84% of S&P 500 companies have beaten earnings estimates this quarter—and these two words keep coming up
NewslettersCFO Daily
84% of S&P 500 companies have beaten earnings estimates this quarter—and these two words keep coming up
By Sheryl EstradaMay 5, 2026
14 hours ago
Sequoia-backed Astrocade raises $56 million to let everyone build games
NewslettersTerm Sheet
Sequoia-backed Astrocade raises $56 million to let everyone build games
By Allie GarfinkleMay 5, 2026
15 hours ago
President Donald Trump in Washington, D.C. on May 4, 2026. (Photo: Kent Nishimura/AFP/Getty Images)
NewslettersFortune Tech
Trump may seek to review AI models before launch
By Andrew NuscaMay 5, 2026
16 hours ago
A jittery CEO crowd at Milken looks abroad for growth—and answers
NewslettersCEO Daily
A jittery CEO crowd at Milken looks abroad for growth—and answers
By Diane BradyMay 5, 2026
16 hours ago

Most Popular

Clean energy's winning argument is the one it refuses to make
Commentary
Clean energy's winning argument is the one it refuses to make
By David CraneMay 5, 2026
15 hours ago
Diary of a CEO founder says he hired someone with 'zero' work experience because she 'thanked the security guard by name' before the interview
Success
Diary of a CEO founder says he hired someone with 'zero' work experience because she 'thanked the security guard by name' before the interview
By Emma BurleighMay 3, 2026
3 days ago
Current price of oil as of May 5, 2026
Personal Finance
Current price of oil as of May 5, 2026
By Joseph HostetlerMay 5, 2026
13 hours ago
Current price of silver as of Monday, May 4, 2026
Personal Finance
Current price of silver as of Monday, May 4, 2026
By Joseph HostetlerMay 4, 2026
2 days ago
Gen Z workers say showing up 10 minutes late to work is as good as on time—but baby boomer bosses have zero tolerance for tardiness, research reveals
Success
Gen Z workers say showing up 10 minutes late to work is as good as on time—but baby boomer bosses have zero tolerance for tardiness, research reveals
By Orianna Rosa RoyleMay 5, 2026
13 hours ago
China stopped issuing new robotaxi licenses over a glitch. America can't stop them from rolling into active shooter situations
Law
China stopped issuing new robotaxi licenses over a glitch. America can't stop them from rolling into active shooter situations
By Catherina GioinoMay 4, 2026
1 day ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.