Ben Mahdavi

Background

Ben Mahdavi is the Co-Founder and Managing Partner of Quiet Capital, a venture capital firm he co-founded with Lee Linden in 2017 ¹². He is based in Los Angeles, California, while the firm is headquartered in San Francisco ³⁴.

Mahdavi was born on February 27, 1980, and grew up on Mercer Island, Washington ⁵⁶. His father, Fereidoon, was an Iranian who played soccer professionally, and his mother, Julie, is Jewish ⁵. Mahdavi attended Mercer Island High School, where he won a state wrestling championship as a heavyweight ⁶.

Mahdavi initially accepted a football scholarship to the University of Utah but left after two weeks and walked on to the University of Washington football program ⁵⁶. He earned a scholarship before the 2000 season and became a team captain in 2002 ⁵⁷. As a linebacker, he finished his career at Washington with 247 tackles, 26.5 tackles-for-loss, and nine sacks ⁷. He led the team in tackles as both a junior (85 tackles, 5 sacks, 10 tackles-for-loss, 4 fumble recoveries) and senior (100 tackles) ⁶. He earned honorable mention All-Pac-10 honors and the Chuck Niemi Big Hit Award ⁶. He played on the 2000 Rose Bowl championship team (11-1 record) ⁶. Mahdavi graduated with a BA in Communications from the University of Washington ⁶⁸.

After college, Mahdavi pursued a professional football career. He signed with the Atlanta Falcons as an undrafted free agent in April 2003 but was released with an injury (broken foot) in August 2003 ⁶⁹. He was then signed by the Indianapolis Colts, who allocated him to the Amsterdam Admirals of NFL Europe for the 2004 season, where he appeared in 10 games with 5 starts, recording 21 tackles ⁹. He was released by the Colts in August 2004 ⁹.

Following his football career, Mahdavi transitioned to finance. He worked as an Associate at Lehman Brothers (June 2008 to August 2008) and as an Assistant Vice President at Barclays Capital (August 2009 to March 2014) ³¹⁰. He also earned an MBA from the University of Washington’s Michael G. Foster School of Business (2007-2009) and attended Tel Aviv University ⁸.

In 2014, Mahdavi founded Sivia Capital Partners, a multi-family office, which he ran until 2020 ³¹⁰. Alongside his investing career, Mahdavi built operating businesses: he launched Tacit Salon Holdings, described as the largest independently owned salon operator in the US ¹². He also served as a founding board member and investor in the Veterinary Care Group, a tech-enabled veterinary services roll-up that was later sold ¹³. He has served as a Board Member at Hair Cuttery Family of Brands since March 2020 ⁴.

Stated Thesis

Mahdavi has stated that he invests across SMB software, e-commerce, fintech, and impact sectors, focusing on seed through Series B companies, with investments typically ranging from $100K to $10M and a sweet spot around $1M ³¹¹.

Quiet Capital’s broader thesis emphasizes backing “founder-operators with deep industry experience and prior successful exits,” investing “from position of operational insight rather than pure financial engineering” ¹². The firm explicitly seeks founders with prior successful exits, technical depth, and strong product instincts, and avoids non-technical founding teams and companies lacking early traction ¹².

Mahdavi’s background as both a professional athlete and an operator who built and scaled physical businesses (salon and veterinary chains) distinguishes him from typical venture investors. His self-described focus on “impact” investing is notable alongside the more standard software and fintech categories ³¹¹.

Inferred Thesis

Based on 28 portfolio companies attributed to Mahdavi personally across AngelMatch and Premier Alternatives databases ¹¹⁴, the following patterns emerge. Note: this is a small, likely incomplete sample of his total investments through Quiet Capital.

Stage distribution: Mahdavi’s focus areas are listed as seed, Series A, and Series B on Signal by NFX ³. The firm’s overall profile shows 52% seed, 26% Series A, and 13% Series B based on Tracxn data for Quiet Capital as a whole ¹³. Mahdavi’s personal investments likely skew toward seed and early-stage given his stated $100K-$10M range.

Sector breakdown: Of 28 attributed portfolio companies: enterprise/productivity software appears most frequently (Gusto, Talkdesk, VTS, Zenefits, Rescale, Collective Health, WorkStep, Taskade — 8 of 28, 29%), followed by consumer platforms (Reddit, Instacart, MasterClass, Eaze, PAX Labs — 5 of 28, 18%), fintech (Earnest, Clover Health — 2 of 28, 7%), and a long tail across healthtech (One Medical), logistics (Flexport), agtech (Bowery Farming), legal tech (Atrium), and AI (OpenAI, Cognition, Magic) ⁴¹¹.

AI investments: More recent investments show a strong tilt toward AI: Magic (August 2024), Cognition, and OpenAI are all AI/developer tools companies ⁴¹⁴. Through Quiet Capital, Mahdavi has also been involved with Chroma (AI vector database, $18M seed, April 2023) and Taalas (AI chip startup, $50M, March 2024) ¹⁵¹⁶.

Geographic focus: Primarily US-based companies, consistent with Quiet Capital’s overall portfolio (70% US) ¹³.

Operating company pattern: Uniquely among venture investors, Mahdavi has simultaneously built operating companies (Tacit Salon Holdings, Veterinary Care Group, Hair Cuttery board) while investing. This suggests a comfort with services businesses and roll-up strategies alongside pure tech investing ¹⁴.

Co-investor patterns: As a co-founder of Quiet Capital, Mahdavi invests alongside partners Lee Linden, Matt Humphrey, Michael Bloch, David Greenbaum, and Daniel Gruneberg ². The firm frequently co-invests with top-tier Silicon Valley firms across its broader portfolio.

Note: With only 28 companies attributable specifically to Mahdavi out of Quiet Capital’s 262+ portfolio companies, this analysis has limited coverage. It is unclear which investments are Mahdavi’s personal angel deals versus firm-level investments he participated in.

Portfolio

The following companies are attributed to Ben Mahdavi personally across multiple investor databases. Most lack independently verified investment years and stages.

Note: This table represents 33 companies attributed to Mahdavi, but only 3 have independently verified investment dates. The majority are sourced from aggregator databases (AngelMatch, Premier Alternatives) without precise year or stage data. It is unclear how many are personal angel investments versus Quiet Capital fund investments.

In Their Own Words

In a 2002 Seattle Times profile during his senior season at the University of Washington, Mahdavi stated about his lifelong ambition: “I’ve had one goal my whole entire life, and that was to play football forever.” About his early years juggling athletics and work as an unscholarshipped walk-on, he said: “I didn’t have much of a life. I had my bright GNC shirt and my purple Husky jersey.” ⁵

On LinkedIn in April 2023, Mahdavi announced Quiet Capital’s investment in Chroma’s $18M seed round, writing: “We are thrilled to partner with Jeff Huber, Anton Troynikov and the entire Chroma team!” ¹⁵

In March 2024, Mahdavi announced Quiet Capital’s investment in Taalas, writing on LinkedIn: “Excited to partner with Ljubisa Bajic, Drago Ignjatovic, Lejla Bajic, and the entire Taalas team!” ¹⁶

Note: Mahdavi maintains a low public profile consistent with Quiet Capital’s branding. His Twitter account (@BFMahdavi) has 229 followers and no public posts. No podcast appearances, conference talks, or in-depth interviews about his investment thesis were found.

What Founders Say

No independently sourced founder testimonials found. Mahdavi maintains a low public profile and Quiet Capital’s branding emphasizes discretion. Dedicated searches of Twitter/X, podcast transcripts, press coverage, and Product Hunt did not surface founder reviews or testimonials about working with Ben Mahdavi specifically.

Sources