Ted Maidenberg

Background

Ted Maidenberg is Co-Founder and General Partner of Tribe Capital, which he co-founded in June 2018 alongside Arjun Sethi and Jonathan Hsu after the three departed Social Capital ^{1 2}. He is a Kauffman Fellow (Class 12), with his fellowship mentored by Arati Prabhakar at U.S. Venture Partners (USVP) in Menlo Park ³.

Maidenberg holds a BS with Honors in Business Administration from Washington University in St. Louis ³. He began his career at Credit Suisse in the media/telecom investment banking group, focused on radio and communication tower sectors ³. He then became a founding member of the Time Warner Investments group (formerly AOL Investments), where his team invested in 60+ early-stage companies; Maidenberg personally led 12 transactions including Blackboard, Exent, PlanetOut, Shopping.com, and Vindigo ³.

Maidenberg subsequently served as Director at Warner Bros. Digital Distribution, heading the Asia Pacific region where he built out Warner Bros.’ mobile content publishing business across Australia, China, India, Japan, Korea, and the Philippines, working with brands including Harry Potter, DC Comics, Tom & Jerry, and Looney Tunes ³.

He then joined U.S. Venture Partners as a Partner, where he focused on investments in digital media, business software, consumer software, and mobile content and applications ^{3 4}. At USVP, he served on the boards of LivingSocial, Media6Degrees, and Savings.com, and was actively involved with 4INFO, National Banana, ON24, and Yoomba; exit investments included Adify and Revolution Money ³.

In 2011, Maidenberg co-founded The Social+Capital Partnership with Chamath Palihapitiya and fellow Kauffman Fellow Mamoon Hamid, where he served as General Partner ^{3 5}. Social Capital was a stage-agnostic fund focused on entrepreneurs in healthcare, education, financial services, and internet technologies ³. At Social Capital, Maidenberg was part of investing teams that made investments in Slack, Carta, and SurveyMonkey ⁴. When Social Capital transitioned to a family office model in 2018, Maidenberg departed with Sethi and Hsu to co-found Tribe Capital ^{1 2}.

Tribe Capital manages over $2.2 billion in assets and employs a data-driven investment approach, with two-thirds of staff working in R&D, engineering, and data science ^{6 7}. The firm’s proprietary “Magic 8-Ball” tool, developed during the Social Capital era, provides quantitative analysis of product-market fit for potential investments ^{2 4}.

Stated Thesis

Maidenberg has publicly emphasized a data-driven approach to venture investing. Tribe Capital publicly describes itself as “sector and stage agnostic,” aiming to identify companies with “N-of-1” potential through proprietary data science models ⁶. The firm states its mission is to “leverage data to create systematic investment criteria, and deploy capital with precision” ⁶. The firm meets with approximately 1,000 companies annually, conducts detailed reports on 500, and invests in 5-6 ⁷.

In discussing the Humi investment, Maidenberg stated that Tribe Capital’s decision was driven by quantitative analysis: “The Humi team has built a strong foundation with loyal customers and when we performed our data-driven analysis we saw clear signals of strong product-market fit and were also impressed with the product vision the team has” ⁸.

Maidenberg has also expressed a thesis around data-intensive businesses, stating: “The most valuable technology companies of our generation are ones that collect massive and important data sets” ⁹.

Inferred Thesis

Based on 17 verified investments attributed to Maidenberg across Social Capital, Tribe Capital, and personal angel investments. His broader involvement through Tribe Capital’s 185+ portfolio and Social Capital’s portfolio (including Slack, Carta, SurveyMonkey) is not fully captured here.

Sector distribution (17 verified investments): - Healthcare / health tech: 6 of 17 (35%) — Propeller Health (Series A-D), Hone Health, Marley Medical, CareRev, Simplee - Hospitality / consumer tech: 2 of 17 (12%) — Arryved, creativeLIVE - HR / workforce tech: 1 of 17 (6%) — Humi (Series A, B) - Ocean tech / deep tech: 1 of 17 (6%) — Saildrone (Series A-C) - Fintech: 1 of 17 (6%) — Noah - Enterprise / data: 1 of 17 (6%) — mParticle - Ad tech / media: 1 of 17 (6%) — Place Exchange - Other: 4 of 17 (24%) — Cover, and other companies where specific details are limited

Note: Simplee straddles healthcare and fintech; counted under healthcare. CareRev straddles healthcare and workforce tech; counted under healthcare.

Stage distribution: Maidenberg invests from seed through Series D. Documented early-stage leads include Propeller Health Series A (2013, via Social Capital), Saildrone Series A (2016, via Social Capital), Humi Series A (2020, via Tribe Capital), and Place Exchange Series A (2021, via Tribe Capital). He shows strong follow-on conviction, investing across 3-4 rounds in companies like Propeller Health (Series A through D) and Saildrone (Series A through C).

Geographic pattern: Primarily US-based portfolio with notable international reach into Canada (Humi, Toronto) and earlier career experience across Asia-Pacific markets at Warner Bros. ³.

Notable patterns: - Healthcare overweight: Despite Tribe Capital’s stated sector agnosticism, 35% of Maidenberg’s personally attributed investments are in healthcare or health-adjacent companies — a concentration dating back to Social Capital, where healthcare was an explicit focus area ³. - Board-level engagement: Maidenberg consistently takes board seats in his portfolio companies — documented board roles at Hone Health, Humi, Saildrone, Propeller Health, Simplee, Place Exchange, Arryved, Cover, and creativeLIVE ^{10 11}. - Follow-on conviction: Multiple portfolio companies show investments across 3-4 rounds (Propeller Health: Series A through D; Saildrone: Series A through C; Humi: Series A and B), indicating high conviction and willingness to support companies through multiple stages. - Founder relationships drive deal flow: Maidenberg’s angel investment in Marley Medical came through Propeller Health founders (Chris Hogg, Joe Slavinsky, David Hubanks), demonstrating how board-level relationships generate deal flow ^{12 13}. - Operator background influence: His experience building Warner Bros.’ mobile content business across six Asia-Pacific countries gives him an operator-like perspective, particularly around content distribution and international scaling ³.

Sample size caveat: 17 verified investments is a modest sample. Maidenberg’s actual portfolio through Tribe Capital and Social Capital is likely substantially larger.

Portfolio

Investments from 2012-2018 were made through Social Capital. Investments from 2018 onward were made through Tribe Capital unless noted as angel. This table represents Maidenberg’s individually attributed investments; his broader involvement in Tribe Capital’s 185+ portfolio and Social Capital’s portfolio (including Slack, Carta, SurveyMonkey) is not fully captured here.

In Their Own Words

“Asthmapolis is a pioneering company at the intersection of sensors, analytics and digital health. The company boasts a strong pipeline, plus a compelling track record of successful patient outcomes. In the context of health reform, Asthmapolis presents the first compelling business case in digital health for payers and providers seeking to better manage costs and outcomes for people with chronic respiratory disease.” — Ted Maidenberg, Propeller Health (then Asthmapolis) Series A press release, April 2013 ²⁵

“The most valuable technology companies of our generation are ones that collect massive and important data sets.” — Ted Maidenberg, Saildrone Series A press release, September 2016 ⁹

“Oceans cover over 70 percent of the earth’s surface, but we know very little about them due to the historically prohibitive cost of research. At Social Capital, we’re excited about the vast commercial applications of Saildrone-collected data as well as how these unprecedented insights into our oceans will help the world move beyond debate and into action when it comes to climate change.” — Ted Maidenberg, Saildrone Series A press release, September 2016 ⁹

“If COVID-19 has taught us anything, it’s that a company’s people are their most valuable asset, and we are thrilled to invest in Humi whose product allows employees to be supported regardless of location.” — Ted Maidenberg, Humi Series A announcement, June 2020 ⁸

“The Humi team has built a strong foundation with loyal customers and when we performed our data-driven analysis we saw clear signals of strong product-market fit and were also impressed with the product vision the team has.” — Ted Maidenberg, BetaKit interview, June 2020 ⁸

“Place Exchange’s exceptional early growth reflects its potential and we believe the company is well positioned to expand its foothold from a position of strength well into the future.” — Ted Maidenberg, Place Exchange Series A announcement, July 2021 ¹⁷

“Hone Health has quickly emerged as a leader in men’s health, prioritizing patient safety and delivering a unique, comprehensive solution that addresses critical market needs. We are excited to support their next phase of growth as they continue to expand their footprint into longevity and holistic healthcare.” — Ted Maidenberg, Hone Health Series A announcement, January 2025 ¹⁴

What Founders Say

Richard Jenkins, founder and CEO of Saildrone, stated at the time of the Series A led by Social Capital (where Maidenberg was a partner): “We’re thrilled to be partnering with like-minded investors, who are mission driven and have deep expertise in marrying innovative hardware with big data” ⁹.

Ari Buchalter, CEO of Place Exchange, said at the time of the Tribe Capital co-led Series A: “We are incredibly excited to be bringing on Revolution Ventures and Tribe Capital as partners who share that vision and our passion for transforming the Out of Home channel” ¹⁷.

No other independently sourced founder testimonials specifically about Ted Maidenberg were found. Humi co-CEO discussed company strategy in press coverage of the Tribe Capital-led Series A but did not provide direct commentary about Maidenberg specifically ⁸.

Connections

• Co-founder, Tribe Capital (2018-present) — alongside Arjun Sethi and Jonathan Hsu ^{1 2}
• Co-founder, Social Capital (2011-2018) — alongside Chamath Palihapitiya and Mamoon Hamid ^{3 5}
• Board member, Hone Health (2020-present) ¹⁰
• Board member, Humi (2019-present) ¹⁰
• Board member, Place Exchange (2021-present) — alongside Tige Savage (Revolution Ventures) ^{17 10}
• Board member, Arryved (2021-present) — alongside Loren Bendele (CEO, former Savings.com where Maidenberg was also a board member) ^{10 18}
• Board member, Cover (2020-present) ¹⁰
• Board observer, CareRev (2022-present) ¹⁰
• Board member, Saildrone (2016-present) ¹⁰
• Board member, Propeller Health (2013-2018) — invested via Social Capital from Series A through acquisition by ResMed in December 2018 ^{25 10}
• Board member, Simplee (2012-2020) — led Series A via Social Capital ^{26 10}
• Board member, creativeLIVE (2013-2018) ¹⁰
• Former board member, LivingSocial — during USVP tenure ³
• Former board member, Media6Degrees — during USVP tenure ³
• Former board member, Savings.com — during USVP tenure ³
• Former Partner, U.S. Venture Partners ³
• Founding member, Time Warner Investments — led 12 of 60+ early-stage investments ³
• Kauffman Fellow, Class 12 — mentored by Arati Prabhakar ³

Sources