EricWiesen

Eric Wiesen started early. At 20, still an undergraduate at UC Berkeley, he co-founded Xert Computing - a hardware and services company for the 3D graphics and animation industry. He ran sales, marketing, and partnerships. The company was eventually sold. Not bad for a college sophomore.

Then he went to law school. University of Michigan, JD. Landed at Fenwick and West in Silicon Valley, one of the firms where venture-backed startups turn when they need help raising capital, navigating M&A, or managing securities work. He watched deals from the legal side. He saw the structure of how capital moves and how companies get built. That vantage point doesn't leave you.

Stuart Ellman and Will Porteous at RRE Ventures recruited him as an Associate in 2008. The timing was... interesting. The financial crisis arrived the same year. But so did the smartphone, cloud computing at scale, and the consumer internet about to generate a decade of the most consequential startup exits in history.

Wiesen moved up to General Partner at RRE by 2010. Over the next five years, he sourced or led more than two dozen investments. Venmo was a $26M acquisition in 2012 - tiny, seemingly. Then Braintree went to PayPal for $800M in 2013. Venmo came along for the ride. Within a few years, Venmo was processing hundreds of billions in transactions annually. That's not luck. That's reading the room early.

In 2015, Wiesen made the move to Bullpen Capital. The firm was built around a specific thesis: the market was structurally broken between seed and Series A. Companies that didn't fit the standard "raise seed, show traction in 18 months, raise $10M+" model were getting left behind - not because they were bad companies, but because the timing didn't fit the template.

Bullpen's answer was post-seed capital with flexible structures. Wiesen fit that philosophy precisely. His whole career had been about reading companies from a different angle - as a lawyer, as a founder, as an investor who'd seen the full stack of how startups actually work.

He's been there since. Fund IV, Fund V, Fund VI. Investments in digital mental health, energy sector operations, family-focused commerce, neighborhood work clubs. The sectors change; the instinct stays the same - find the non-obvious bet where value is real but the herd hasn't looked yet.

Along the way, he also went back to school. Columbia Business School for an MBA. Then earned a spot in Kauffman Fellows Class 13, a selective program for emerging investment leaders, where he was mentored by RRE's own Stuart Ellman. He received the Class 13 Jeff Timmons Memorial Award for service - the kind of honor that marks someone as not just good at the job but invested in the broader community around it.

The name is baseball. A bullpen is where pitchers warm up - ready for the big game, not yet called in. Bullpen Capital backs companies at exactly that moment: they've proven their stuff in the minors, but haven't yet gotten the call from the traditional Series A herd.

Wiesen joined in 2015, drawn by the clarity of that thesis. His work at RRE had shown him how many genuinely promising companies got stranded between seed and Series A - not because they'd failed, but because they didn't fit the pattern that institutional VCs were looking for. Too small for Sequoia. Too big for pre-seed. The gap was real.

Bullpen's answer - and Wiesen's operating thesis - is flexible capital with a specific mandate: back companies that need a different kind of on-ramp. Not every startup runs on an 18-month clock. Some sectors move differently. Some business models take longer to prove. The investors who can read that difference, and have the patience and the capital to act on it, find some of the most interesting opportunities in the market.

Eric Wiesen grew up in San Rafael, California - a Marin County town just north of the Golden Gate Bridge. He went to school there, met his future wife Marika at Davidson Middle School (in the 1980s, as kids), then left for Berkeley, Michigan, New York, and the broader arc of a career that took him across the country and back.

In 2016, he and Marika brought their two children back to San Rafael. It's the kind of move that says something about priorities - the career had clearly gone well enough that they could choose where they wanted to live, and they chose the place they started. They were featured in Marin Magazine in 2024 for a colorful home renovation - bright, welcoming, a sharp contrast to the navy-and-number-heavy world of venture capital spreadsheets.

He cooks. He's an avid home chef - genuinely, not in the "I have a Viking range" sense. He's been on Twitter since February 2007, posting on economics, business, and politics with the kind of directness you'd expect from someone whose personal mantra is "Bias to Action."

Wiesen maintains a Medium presence under @ewiesen with nearly 3,000 followers. His tag there: "Bias to Action." The writing is direct, analytical, and occasionally contrarian - which tracks with someone who spent years identifying investments the consensus missed.

His most notable piece, "Warming up in the Bullpen," published when he joined Bullpen Capital in 2015, laid out the post-seed thesis in clear terms: the gap between seed and Series A is real, structural, and exploitable. He described why he left RRE for Bullpen, what differentiated product means for a VC firm, and what "stage differentiation" actually looks like in practice.

He's also written on founder equity arrangements, founder liquidity, VC fundraising dynamics, and market efficiency - the full stack of issues a General Partner navigates. He thinks in systems. The writing shows it.

In 2019, Venture Capital Journal ran a feature on his approach: "Bullpen's Eric Wiesen on avoiding the investment herd and common VC mistakes." The common VC mistakes turn out to be mostly about following everyone else's thesis rather than building your own.