William Sacks

Investor at D1 Capital Partners

📍 United States🔄 Updated September 2026💼 2 investments📅 5 years investing🗓 Last invested Jul 2022
VC🌍 United States
2
Total investments
1
Early stage
1
Mid stage
0
Late stage
5y
Years active

Portfolio

2 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
Jul 2022
D1 Capital Partners L.P. is a global investment firm that deploys capital in both public and private markets. D1 was founded in July 2018 by Daniel Sundheim. The firm invests on behalf of investors globally, including endowments and foundations, family offices, sovereign wealth funds, outsourced CIOs, hospitals and pensions. D1 has a fundamental and research-intensive investment strategy with a focus on medium to long-term returns. Its research centers on the consumer, business services, financial services, healthcare, industrials, real estate and technology, media and telecom sectors. Geographically, investments are generally in North America, Western Europe, Japan, and China. Most of the firm’s capital is deployed in publicly traded equities as well as equity derivatives, convertibles and other fixed income instruments. The private equity strategy is opportunistic and primarily later-stage, non-control stakes in companies raising capital for expansion.
Board Member
Nov 2021
We’re Brightspeed, a brand-new internet provider on a mission to bring more connectivity to America. We believe where you choose to call home shouldn’t limit your options—and we’re building the infrastructure to provide millions of homes with fast, reliable internet. So, wherever you’re streaming, gaming or working, you’ll enjoy an uninterrupted experience.
Experience · 4 entries
All (4)
Investments (2)
Board (1)
2022
Investor
Jul 2022
D1 Capital Partners L.P. is a global investment firm that deploys capital in both public and private markets. D1 was founded in July 2018 by Daniel Sundheim. The firm invests on behalf of investors globally, including endowments and foundations, family offices, sovereign wealth funds, outsourced CIOs, hospitals and pensions. D1 has a fundamental and research-intensive investment strategy with a focus on medium to long-term returns. Its research centers on the consumer, business services, financial services, healthcare, industrials, real estate and technology, media and telecom sectors. Geographically, investments are generally in North America, Western Europe, Japan, and China. Most of the firm’s capital is deployed in publicly traded equities as well as equity derivatives, convertibles and other fixed income instruments. The private equity strategy is opportunistic and primarily later-stage, non-control stakes in companies raising capital for expansion.
2021
Board Member
Nov 2021
We’re Brightspeed, a brand-new internet provider on a mission to bring more connectivity to America. We believe where you choose to call home shouldn’t limit your options—and we’re building the infrastructure to provide millions of homes with fast, reliable internet. So, wherever you’re streaming, gaming or working, you’ll enjoy an uninterrupted experience.
2017
Principal, Private Equity
Aug 2017
Apollo is a high-growth, global alternative asset manager. In our asset management business, we seek to provide our clients excess return at every point along the risk-reward spectrum from investment grade credit to private equity. For more than three decades, our investing expertise across our fully integrated platform has served the financial return needs of our clients and provided businesses with innovative capital solutions for growth. Through Athene, our retirement services business, we specialize in helping clients achieve financial security by providing a suite of retirement savings products and acting as a solutions provider to institutions. Our patient, creative, and knowledgeable approach to investing aligns our clients, businesses we invest in, our employees, and the communities we impact, to expand opportunity and achieve positive outcomes. To learn more, please visit www.apollo.com. Nothing herein constitutes an offer to sell, or a solicitation of an offer to buy, any security or product of Apollo or any Apollo-managed fund.
2015
Investment Banking Analyst
Jul 2015
We aspire to be the world’s most exceptional financial institution, united by our shared values of partnership, client service, integrity, and excellence. Operating at the center of capital markets, we act as one firm, mobilizing our people, capital, and ideas to deliver superior results across our clients’ most complex challenges. For 157 years, Goldman Sachs has delivered world-class execution on a global scale across our leading Global Banking & Markets and Asset & Wealth Management businesses. Apprenticeship is central to our culture, with hands-on coaching and access to leaders who bring decades of experience and expertise. With office locations around the world, we offer a broad range of career opportunities to those who insist on excellence and thrive on performance. Find our Social Media Disclosures here: gs.com/social-media-disclosures