---
title: "Multi-Family Office 13Fs: How Cresset, Pathstone, Bessemer Differ"
type: learn
slug: multi-family-office-13f-cresset-pathstone-bessemer-reading-guide
canonical_url: https://13finsight.com/learn/multi-family-office-13f-cresset-pathstone-bessemer-reading-guide
published_at: 2026-05-15T05:11:09.349Z
updated_at: 2026-05-15T05:11:12.829Z
author: Sarah Mitchell
author_title: Education Editor
author_url: https://13finsight.com/authors/sarah-mitchell
word_count: 887
locale: en
source: 13F Insight
---

# Multi-Family Office 13Fs: How Cresset, Pathstone, Bessemer Differ

> Cresset's 13F has Arista at 11.81% portfolio. Pathstone, Bessemer Trust, and other multi-family offices file similar concentrated-plus-ETF structures. These are not discretionary stock-picker 13Fs — they reflect aggregated individual client positions. Here's how to read them.

Multi-family offices (MFOs) and large registered investment advisors (RIAs) serving ultra-high-net-worth families file 13F-HR filings just like any other institutional manager. Their position lists look unlike anything a conventional active equity manager files. Cresset Asset Management at $23.73 billion holds Arista Networks at 11.81% portfolio, plus 17.71% combined in S&P 500 ETFs. Similar shapes show up at Pathstone Family Office, Bessemer Trust, Glenmede Trust Company, Wilmington Trust, and several other large MFO/RIA filers. Reading these 13Fs with the same lens as a Capital Group or Fidelity active manager will lead to wrong conclusions. This guide explains the structural logic and the reading rules.What an MFO 13F actually isMulti-family offices manage discretionary equity portfolios for individual ultra-high-net-worth families. Each client has different objectives, constraints, and existing concentrations:Single-name founder concentrations. A tech-executive client may hold $50-500M in their own former or current employer. The MFO manages that concentrated position alongside their broader diversified portfolio.Generational wealth transfers. Trust structures, charitable foundations, and generation-skipping vehicles produce concentrated positions in legacy family-business holdings.Risk-managed beta sleeves. Many clients require S&P 500-tracking exposure as a portion of their portfolio, which MFOs implement through SPY, IVV, VOO, or RSP ETFs.Individual stock-pick views. Some clients want active discretion on specific positions; the MFO accommodates this through individual-stock holdings tailored to each client.The 13F filing aggregates all of this into a single reporting entity. The resulting position list mixes single-stock concentrations (often unusually large at 8-15% portfolio weights), ETF beta sleeves (5-20% combined), and standard mega-cap tech positions, with a long tail of incremental client positions.The five structural fingerprintsFingerprint 1: Unusual single-stock concentration above 10%No conventional active equity manager runs a single-name concentration above 10% in a non-mega-cap stock at $20+ billion AUM. When you see Cresset at 11.81% in Arista or a similar firm at 10-15% in a single mid-cap, MFO-driven client-mandate mechanics are almost certainly the cause. Family-trust 13Fs (Hershey, Greenleaf) run even higher single-name concentrations but are easily distinguished by the trust-named filer entity.Fingerprint 2: S&P 500 ETFs in top 5-10 at meaningful weightSPY, IVV, VOO, or RSP appearing in the top 5-10 at 5%+ portfolio weight is the MFO accommodation of client beta-tracking mandates. Conventional active managers either run zero ETF exposure or use ETFs only as small tax-overlay positions. MFOs routinely deploy 10-20% in ETFs.Fingerprint 3: International ETFs alongside US-equity positionsiShares MSCI EAFE (IEFA), iShares Core MSCI Total International (IXUS), or Vanguard FTSE Developed Markets (VEA) appearing as a top-30 position signals global-equity allocation for clients with international mandate requirements. Most US-active managers focus on US equity exclusively.Fingerprint 4: Position list reads as 'unstructured aggregation'The top 20 mixes single-stock concentrations, ETFs, mega-cap tech, regional banks, and miscellaneous mid-cap names without a unifying philosophical thread. The position list looks like the average of 1,000 individual client portfolios because that is what it is.Fingerprint 5: WhaleScore below 70The platform's WhaleScore methodology rewards concentrated active discretion. MFO filers typically score in the 60-70 range (below pure-active-manager elite tier) because client-mandate accommodation dilutes the discretionary-conviction signal. The structurally lower score is not a critique; it is the correct read on the filer's mandate.The largest US MFO/RIA 13F filersFirmAUM (US 13F)StyleCresset Asset Management$23.73BMulti-family office, Chicago. Founder concentrations + ETF beta sleeves.Pathstone Family Office~$10BMFO with concentrated single-name client positions.Bessemer Trust~$5BTrust-based MFO serving multigenerational wealth.Glenmede Trust Company~$8BMFO with concentrated charitable-foundation positions.Wilmington Trust~$10BTrust-based services for family offices.How to read an MFO 13F correctlyThree rules:Rule 1: Don't read concentrated positions as house viewsWhen Cresset holds Arista at 11.81%, the position is not Cresset's investment view on ANET. It is one or more clients' individual founder-equity or executive-compensation concentrations aggregated into the firm-level 13F. Following the position as a trade signal misreads the source.Rule 2: The ETF allocation is client-mandate accommodationThe S&P 500 ETF weight reflects clients who have explicitly requested broad-market exposure. The MFO is filling the mandate; it is not making an active stock-picking call.Rule 3: Watch for sustained position holds at 2%+ weightNames that persist quarter-over-quarter at the 2%+ weight level inside an MFO 13F are likely structural client positions. Watch which mid-cap or large-cap names accumulate concentration across 4-8 consecutive filings — those are the positions worth investigating for the underlying client situation.The opposite read: when concentration IS convictionPure-active concentrated value managers (Abrams Capital, Pershing Square Capital Management, ValueAct Holdings) also run extreme single-name concentrations but for different reasons. The distinguishing features:Active fund concentration typically follows a unified investment philosophy across positions (capacity-to-suffer compounders at Gardner Russo, value-discipline-quality at Abrams, activist engagements at Pershing Square, etc.).MFO concentration has no unifying philosophy because the positions reflect aggregated individual client mandates.Active fund position lists usually contain 10-30 meaningful positions. MFO filings typically span 400-500+ positions in the long tail.Practical applicationWhen evaluating an unfamiliar 13F filer:Check the filer name. Does it include 'Family Office', 'Trust Company', 'Wealth Management', or geographic markers suggesting an RIA structure? If yes, expect MFO mechanics.Look at the top 5-10. Does it mix ETFs and unusual single-stock concentrations? If yes, MFO accommodation is in play.Check the long tail position count. 400+ names with very small weights indicates aggregation across many client portfolios.Check WhaleScore. Sub-70 score combined with the above signals confirms the MFO read.For comparison, see the recent Cresset deep-dive and the contrasting Gardner Russo & Quinn analysis in our research hub.For more on related filer-type identification techniques, see the founder-family trust decoder and the explainer hub.

## FAQ

### What is a multi-family office 13F?

A multi-family office (MFO) is a registered investment advisor that manages discretionary equity portfolios for multiple ultra-high-net-worth families. The MFO files a single Form 13F-HR aggregating all client positions exceeding the $100 million threshold. The resulting position list reflects aggregated individual client mandates rather than discretionary stock-picking conviction at the firm level.

### Why does Cresset hold 11.81% in Arista Networks?

Cresset Asset Management is a multi-family office. The 11.81% Arista position most likely reflects a single major client founder-equity or executive-compensation concentrated stake (Arista CEO is Jayshree Ullal). Multi-family offices often manage individual founder-clients with substantial personal exposure to specific companies. The client directs the firm to manage the position for estate-planning purposes. The position is not Cresset house view.

### Why do MFOs hold so much in S&P 500 ETFs?

Multi-family offices accommodate client mandates that explicitly require broad-market exposure. SPY, IVV, VOO, and RSP serve as beta sleeves for clients who want S&P 500-tracking returns as a portion of their portfolio. MFOs typically deploy 10-20% of AUM in these ETFs versus 0-2% for pure active equity managers. The ETF allocation is filling client mandates rather than expressing stock-picking discretion.

### How do I tell an MFO 13F from a pure-active fund?

Five fingerprints: (1) unusual single-stock concentration above 10% in non-mega-caps, (2) S&P 500 ETFs in top 5-10 at 5%+ portfolio weight, (3) international ETFs alongside US equity, (4) position list reads as 'unstructured aggregation' without unifying philosophy, (5) WhaleScore in the 60-70 range below the elite active-manager tier. Pure-active concentrated funds (Gardner Russo, Abrams Capital) run high concentration but with unified philosophy.

### Should I follow MFO 13F positions as trade signals?

No. MFO concentrated positions reflect aggregated individual client mandates rather than the firm's investment view. Following Cresset's 11.81% Arista position as a trade signal misreads the source — the position belongs to one or more individual clients, not to a discretionary stock-picker thesis. MFO 13Fs are useful for identifying which mid-cap names attract founder-equity client concentrations, but they are not analytical inputs to active stock selection.

### How is an MFO different from a family-trust filer like Hershey Trust?

A family-trust filer (Hershey Trust, Greenleaf Trust for Stryker) holds shares for a single founder family's benefit and runs 50-96% in the founder company. A multi-family office (Cresset, Pathstone, Bessemer) aggregates 1,000+ individual client portfolios into one 13F. The MFO has multiple clients and diverse positions; the family trust has one family and concentrated founder-company holdings. Both file 13F-HR but structurally serve different mandates.

---

Source: 13F Insight — https://13finsight.com/learn/multi-family-office-13f-cresset-pathstone-bessemer-reading-guide
Author: Sarah Mitchell — https://13finsight.com/authors/sarah-mitchell
Last updated: 2026-05-15T05:11:12.829Z