Mar 27, 2026 · 1h 0m · sourcery
Inside Marc Andreessen & Ben Horowitz’s Multi-Family Office · Sourcery with Molly O'Shea
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In this episode of Sourcery, host Molly O'Shea interviews Michel Del Buono, Chief Investment Officer of a16z Perennial, discussing how Andreessen Horowitz's multi-family office serves high-net-worth tech founders through institutional-quality asset allocation, tax optimization, and wealth preservation strategies.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Molly holds 19% of the talking time here. How this is scored →
Molly as informed peer 4.9 Guest teaching 5.3 Guest disagreement 1.8 Molly pushing back 1.3
speaking balance: gold is Molly, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 57:55 Pushing back on private capital exhaustion
Michel firmly dismisses Molly's claim that OpenAI has maxed out available private capital, pointing out that markets previously thought raising such sums was impossible right before it happened effortlessly.
Hardest push from Molly ▶ 56:45 Insisting on competitive race forcing an IPOMolly challenges Michel's wait-and-see framing on IPOs by asserting that the intense head-to-head race between Anthropic and OpenAI will force a public liquidity event sooner.
Biggest teaching moment ▶ 4:05 The fundamental flaw of traditional wealth managementMichel provides a thorough structural explanation of how traditional bank-spawned wealth managers are trained solely as customer service and sales representatives rather than fiduciary professional investors.
Molly holds their own ▶ 45:18 Citing firsthand reporting on fraudulent SPVsMolly demonstrates deep domain knowledge and reporting credentials by citing her direct interviews with Anduril's CEO and COO regarding black-market fraudulent SPVs.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Molly as informed peer | Guest teaching | Guest disagreement | Molly pushing back | Why |
|---|---|---|---|---|---|---|
| Welcome and Defining a16z Perennial | 4 | 3 | 1 | 1 | Molly opens the interview by asking about the founding purpose of a16z Perennial and whether it functions as the multi-family office for Marc Andreessen and Ben Horowitz. Michel clarifies that it serves both the firm's principals and a network of founders to maintain post-liquidity relationships. | |
| Structural Issues in Traditional Wealth Management vs Institutions | 4 | 7 | 2 | 1 | Molly asks for a breakdown of the structural problems in the wealth management sector. Michel delivers an extensive masterclass comparing traditional bank-spinout RIAs that act as service providers against institutional asset managers unable to optimize for taxable high-net-worth clients. | |
| Generational Wealth Shifts and In-House Professional Investors | 5 | 6 | 2 | 1 | Molly brings up generational shifts in wealth and contrasts customer service allure with actual portfolio performance. Michel explains how flat AUM fee models create disincentives to hire internal professional investors, forcing firms into expensive fund-of-funds structures. | |
| The Pitfalls and Challenges of Single-Family Offices | 4 | 6 | 2 | 1 | Molly asks why single-family offices have become trendy despite being difficult to run. Michel explains the severe talent retention challenges, massive balance sheet requirements, and high failure rates after the death of the primary patriarch or matriarch. | |
| Sponsor Segment: Brex | 4 | 4 | 1 | 2 | Following the mid-roll ad read, Molly asks about the minimum wealth threshold required for high-touch wealth management and asks how Perennial differentiates itself from Silicon Valley competitors like ICONIQ. Michel explains Perennial's deliberate decision to keep client numbers small and invest heavily in professional investors. | |
| Navigating Liquidity Events and Vetting Financial Advisors | 6 | 5 | 2 | 2 | Molly brings up the rumored $2T SpaceX IPO and cites her conversations with Sequoia's Shaun Maguire and SpaceX engineers. Michel cautions against immediately dumping concentrated positions, advising instead on structured options strategies to monetize volatility. | |
| High Friction and Lock-In When Switching Wealth Managers | 5 | 6 | 2 | 1 | Molly inquires about the difficulty of switching wealth managers and how onboarding portfolios are structured. Michel details the deliberate platform lock-in maintained by custodian platforms and argues that true advisors must give direct, opinionated guidance rather than passive menus. | |
| Managing Volatility, Real Estate, and Treasury Buffers | 5 | 6 | 2 | 1 | Molly asks how Perennial manages market volatility and allocates between real estate and cash. Michel argues that volatility is an opportunity for liquid balance sheets and explains the tax efficiency of real estate and treasury buffers. | |
| Tax Planning, Qualified Small Business Stock, and State Migration | 6 | 6 | 2 | 1 | Molly highlights California's billionaire tax debates and the migration of wealth to other states. Michel explains the strict legal realities of severing California tax residency and details pre-liquidity tax strategies like QSBS trust stacking. | |
| Sponsor Segment: VCX by Fundrise | 5 | 6 | 2 | 1 | After the sponsor read, Molly asks about utilizing capital losses in light of a viral tweet by Chamath Palihapitiya regarding SPAC declines. Michel explains the tax code mechanics of offsetting losses within partnership fund structures versus personal balance sheets. | |
| Secondary Markets, Multi-Layered SPVs, and Legal Diligence | 7 | 5 | 2 | 2 | Molly references her direct reporting on dark pool fake SPVs from interviews with Anduril leadership. Michel validates her points and details the extensive legal and background diligence required to prevent fraud in secondary SPV markets. | |
| State of Venture Capital, Entity Value, and AI Scale Requirements | 5 | 6 | 2 | 1 | Molly asks about the criticisms surrounding venture capital return dispersion. Michel explains the concept of institutional entity value versus single-partner firms and highlights the massive check sizes needed to compete in AI. | |
| Leadership Lessons from Marc Andreessen and Ben Horowitz | 4 | 5 | 2 | 1 | Molly asks about leadership lessons from Marc Andreessen and Ben Horowitz, followed by the biggest mistakes founders make with wealth. Michel shares their strength-based hiring philosophy and warns against founders immediately angel-investing 80% of their net worth into friends' startups. | |
| Quick Fire Macro: Private Credit and Economic Debt Risks | 5 | 6 | 2 | 2 | Molly launches a macro quick-fire round asking if private credit is in a bubble. Michel differentiates between direct consumer lending buffers and heavily leveraged PE sponsor-backed debt that relies on continuous economic growth. | |
| Quick Fire Macro: The Tech IPO Window and Private Funding | 6 | 5 | 3 | 3 | Molly and Michel debate whether the tech IPO window is opening, comparing SpaceX and OpenAI. When Molly argues OpenAI has reached the absolute limit of private capital with its $110B round, Michel counters that private capital appetite remains historically unprecedented. | |
| Looking Ahead: Media Expansion and Educational Mission | 3 | 2 | 0 | 0 | Molly closes the interview by asking Michel what he is most excited about for the year ahead. Michel shares Perennial's push into media and educational outreach before Molly wraps up the show. |
Statements from this episode (34)
Del Buono: a16z Perennial Serves Firm Principals and External Founders
“It's a multifamily office for the principals here and a number of founders, not necessarily been backed by the company, but many in fact backed by the company.”
Andreessen and Horowitz founded Perennial finding traditional wealth management underwhelming
“The principles here, Mark and Ben included had been served by more traditional wealth management firms. And they looked to the LPs of A-sixteen Z and saw, you know, the big sovereign wealth funds, the big pensions have very high end professional investment tea…”
Del Buono: Traditional Wealth Managers Are Trained Service Providers, Not Investors
“Most of these firms, the independent firms have spun out of banks and the banks themselves don't train people to be professional investors, right? These people are trained to be service providers. They're trained to be responsive. They're trained to be helpful…”
Del Buono: Flat Fee RIA Structures Disincentivize Alternative Investment Strategies
“The flat fee arrangement You know, means that people do not invest in building out these alternative teams. It's a lot of work, it's a lot of effort, and it's a lot of expense. And if you make the same 40, 50, 60 bips doing that, or just buying stocks and bond…”
Del Buono: Institutional Asset Managers Do Not Optimize for After-Tax Returns
“Their pensions, endowments, foundations, sovereign wealth funds, all these people don't pay tax. So they are not at all focused on the taxable element. And if you're an individual you're paying, especially in this state you're paying 50 plus percent tax. So th…”
Del Buono: Wealth managers charge AUM fees for services because it is more profitable
“So these services, in my opinion, should be fee for service. But because that's of course less profitable than having an AUM based fee on someone's entire balance sheet you charge that fee, you go through the motions of the investment management, but you view …”
Del Buono: Portfolios with 50-70% alternatives incur 3-4% annual look-through fees
“50, 60, 70% alternatives. On a look through basis, your fees are going to be three or four percent a year. So it's a huge headwind. If you can get rid of some of that by having a professional team in house and not always just hiring third party managers that c…”
Del Buono: Single-family offices require billions to justify talent compensation
“If you're trying to build a multi-asset class portfolio, global multi-asset class portfolio, you're going to hire a bunch of these sort of professional investors I mentioned. I don't know, you need five, six, seven of them, different asset classes. You've got,…”
Del Buono: Single-family offices struggle to retain talent without founder involvement
“The principle of the family is signing up really to be a manager of an asset management company. That's really what they're signing up for. I don't think many of them actually realize that's what they're signing up for, and I don't think they want to do that, …”
Del Buono: a16z Perennial buys liquidated assets from dissolved family offices
“When the patriarch or matriarch passes away, very often the family office falls apart. Either the investments are completely turned around and things are liquidated in a hurry that results in large losses. By the way, we're the beneficiaries of that. Sometimes…”
Del Buono: Perennial targets centi-millionaires and billionaires with $25M-$50M minimum
“25, fifty million dollars would kind of be the minimum, really, but I would say it's really more for the centi-millionaires and billionaires who have, again, you know, an institutional time, multi-generational time horizon, so they're more like an endowment th…”
Del Buono: a16z Perennial serves only a couple dozen families
“And so we only have a couple dozen families that we work with in that sort of overarching quarterback of everything.”
Del Buono: Most tech-focused RIAs have at most one or two professional investors
“So a lot of these firms do not have professional investors. So I often ask people as a quiz how many professional investors do you think are in, you know, RIA XYZ? And people will answer, I mean, percent, right? People answer me, 20%, 50%, 30%, but the number …”
Del Buono: Tech employees can monetize volatility through options without selling stock
“Part of their strategy should be to diversify, but part of it should be to hold on to that stock long term and think about how to maybe even monetize the volatility. So we've built some options programs and things like that for people here to monetize. These s…”
O'Shea: Sequoia has invested billions into SpaceX and Elon Musk companies
“I talked to Sean McGuire of Sequoia, who they've invested billions into SpaceX and Elon companies.”
Del Buono: Custodian Firms Disable Self-Service Features Under RIA Platforms
“When you move under the RA platform, those features are disabled to sort of keep you more locked into that ecosystem.”
Del Buono: Wealth Management Clients Rarely Switch Once Onboarded
“Once you've picked the person, The odds of them moving again are extremely low, right? And so that's where the, all the competition happens.”
Del Buono: Wealth managers offer menus of options to deflect liability
“A lot of, again, firms will present you alternatives. They'll say you can do this, or you could do that. You tell me what you want. And they're doing this for various reasons. One, they may not actually have a strong opinion. Two it's liability. If I tell you …”
Del Buono: Temporary out-of-state moves fail California tax residency tests
“Leaving your house here, your main house and moving to Texas or Florida for a year or two with the intent of coming back, it doesn't qualify. If you do come back after a couple of years, the tax authorities here will say, look, you never sold your house. You n…”
Del Buono: Founders can stack QSBS tax exemptions across multiple trusts
“So you can create several trusts. Each of those trusts gets the now fifteen million dollar exemption before it was 10. So you can do that. Married couples now can get both.”
Del Buono: Holding investments in fund vehicles enables tax-loss offsetting
“The way to use a loss is inside a fund vehicle that generates its own gains that can be offset by its own losses. Then you don't have to worry about extracting the losses and putting them on your personal balance sheet and not being a user.”
Del Buono: Secondary SPV Managers Can Sell Stock Without Investor Approval
“I've seen personally in cases where the stocks that are in the entity are sold by the individual managing the entity. And they don't need to seek approval from the people who invest in it, right?”
Del Buono: Most Secondary Volume Flows Through Questionable SPVs
“The vast majority of the volume goes through these sort of questionable SPDs”
Del Buono: Perennial Has Encountered Full-On Fraud in Secondary SPVs
“I've run into a full-on fraud before, but, you know, the first thing we do is we pay a background check company to see, again, using you as an example, does she actually work at SpaceX?”
Del Buono: Venture Capital Has Highest Return Dispersion of Any Asset Class
“Venture is the biggest dispersion of all the asset classes, like compared to private equity, credit, or hedge funds or whatever.”
Del Buono: AI Startup Check Sizes Make Fund Scale Essential in Venture
“All asset management industries have some scale benefits to them. Venture traditionally had less and now has a lot. So if you're going to back a new AI startup, you can't show up with a million dollar check or two million dollar check that it's useless or let …”
Del Buono: a16z Hires for Outsized Strengths, Not Lack of Flaws
“They said, we don't hire people for lack of flaws. We hire people for their sort of their skills.”
Del Buono: Putting initial founder liquidity into friends' startups almost always fails
“I'll see someone with their very first liquidity, the very, very first liquidity, they take it and instead of doing something a little bit safe in case there's a rainy day, they turn around and they go put it in a bunch of like very early stage startups.
Often…”
a16z Perennial maintains higher liquidity for founders self-funding next companies
“If that's the goal, we try to keep the portfolio actually more liquid because their hope is that they can finance more of it themselves, right?
The idea is, well, I did my first company and by IPO I owned 15% of it.
The next time I want to own 30% of it, right…”
Del Buono: Post-exit founders completely leaving their companies is the exception
“A lot of founders, though I think want to stick with their company very, very long term.
They're not necessarily thinking, you know, two years out, I'm done.
they want to stay along.
I mean, this is their baby.
They know it.
They've grown it.
So it's not nece…”
Del Buono: AI CapEx boom shields leveraged private credit from near-term crisis
“And that, right now, there's no indication of a slowdown in the economy, really. There's a few, you know, there was a bit of a surprise on the employment report, but by and large, the economy's growing, you know, the long-term trend for growth is not even two …”