Top Family Offices in Olbia 2026

Key Facts

• Olbia Investments, the Salteri family's single family office, manages an estimated $1 billion in assets under management from its North Sydney headquarters.
• The Salteri family wealth reached $1.69 billion on the 2020 Australian Rich List, ranking 57th nationally.
• Olbia focuses on four pillars: infrastructure concessions, private equity, venture capital, and public markets.
• The family's two landmark exits totalled over A$1 billion. The largest was the A$775 million sale of Tenix Defence to BAE Systems Australia in 2008.
• Olbia Pty Limited operates as a grandfathered proprietary company under ASIC rules, exempt from public financial reporting since 1995.
• Australia hosts 34 listed single family offices, with AUM ranging from $5 million to $15 billion. Most cluster in Sydney and Melbourne.
• The broader Australian family office sector employs between 10,000 and 20,000 people, more than double the figure from a decade ago.

Australian SFO Landscape and Market Context

Olbia Investments is the Olbia family office of the Salteri dynasty, one of Australia's most prominent ultra-high-net-worth (UHNW) families. The family fortune traces back to Carlo Salteri and Franco Belgiorno-Nettis, who co-founded the engineering conglomerate Transfield in 1956. After a 1995 demerger that split Transfield (then valued at A$733.2 million), the Salteri branch kept the defence and engineering arms and later rebranded them as Tenix.

Today, Olbia Pty Limited serves as the holding company for the family's diversified portfolio. The office sits in North Sydney, within Australia's primary SFO corridor. Sydney and North Sydney house the largest cluster of Australian wealth management firms, followed by Melbourne.

Australia's appeal as a private wealth base extends beyond domestic fortunes. The country levies no inheritance tax, maintains a stable regulatory environment, and sits at the gateway to Asia-Pacific markets. An estimated 122,000 high-net-worth individuals are migrating to Australia, mainly from China, India, and the UK.

The Significant Investor Stream visa requires a minimum A$5 million allocation. This inflow reshapes the local wealth ecosystem and expands co-investment deal flow for established offices like Olbia.

Family Office Comparison

The table below positions Olbia Investments among the largest Australian single family offices by assets under management. Most offices listed run diversified strategies, making Olbia's engineering and defence pedigree a clear differentiator.

Family Office	Type	AUM Estimate	Investment Focus	Location
Gina Rinehart (Hancock Prospecting)	SFO	$15B	Mining, resources	Australia
Skip Capital	SFO	$3.5B	Diversified	Australia
Portland House Group	SFO	$2.3B	Diversified	Australia
Costa Asset Management	SFO	$2B	Diversified	Australia
Australian Capital Equity	SFO	$2B	Diversified	Australia
Thorney Investments	SFO	$1.5B	Diversified	Australia
Paspaley Family Office	SFO	$1.3B	Diversified	Australia
Olbia Investments (Salteri Family)	SFO	$1B	Infrastructure, PE, venture, public markets	North Sydney
Tanarra	SFO	$1B	Diversified	Australia
Marinya Capital (John Fairfax Family)	SFO	$500M	Diversified	Australia
Grok Ventures	SFO	$500M	Diversified	Australia
Bower Capital (Harvey Family)	SFO	—	Interest rate securities, derivatives	Sydney

Olbia ranks among the top ten Australian SFOs by managed assets. Its multi-asset strategy, rooted in engineering and defence contracting, sets it apart from the mining-origin and media-origin fortunes that dominate the upper tier.

Top Picks by Strategy

• Largest AUM: Gina Rinehart Family Office, managing $15 billion built on mining and resource wealth, dwarfs every other Australian SFO by a factor of four.
• Best for Engineering Heritage: Olbia Investments (Salteri Family), whose portfolio descends from Sydney Harbour Tunnel construction and Tenix's national defence and project contracts.
• Top Diversified Platform: Skip Capital, with $3.5 billion in diversified assets, operates one of the broadest mandates in the Australian SFO space.
• Strongest Deal Exit Record: Olbia Investments again, having executed over A$1 billion in exits through the BAE Systems and Downer EDI sales alone.
• Notable Pearling-to-Portfolio Transition: Paspaley Family Office, managing $1.3 billion after converting pearling-industry wealth into a diversified wealth platform.
• Best for Fixed-Income Focus: Bower Capital (Darren Harvey Family Office), whose founder co-created one of Australia's leading fixed-income firms in 2011, now overseeing $17 billion in funds.
• Leading Media-Origin SFO: Marinya Capital (John Fairfax Family), managing $500 million in diversified assets rooted in one of Australia's oldest media dynasties.

Leading Australian Family Offices in Detail

Olbia Investments (Salteri Family Office)

Olbia Investments deploys roughly $1 billion from North Sydney through a holding company under Olbia Pty Limited. The office channels capital in four directions: long-term project concessions, private equity, venture opportunities, and public markets. Its most significant historical asset was a 25% interest in the Sydney Harbour Tunnel, held from 1988 until the operating contract expired in 2022.

The family's wealth crystallised through two major exits. In 2008, the Salteris sold Tenix Defence to BAE Systems Australia for A$775 million. Six years later, they sold the remaining Tenix assets to Downer EDI for A$300 million. These events converted an operating industrial conglomerate into a liquid portfolio. Paul Salteri and his brother Robert now oversee the holdings as the second generation after founder Carlo Salteri.

Gina Rinehart Family Office

Australia's largest SFO by a wide margin at $15 billion, the Rinehart portfolio centres on mining and resources through Hancock Prospecting. The office also makes selective agricultural allocations. In 2014 it purchased Paul Salteri's Wagyu cattle station for A$31.5 million, linking these two families in a direct transaction. UHNW families in the resources sector will find this office's scale and vertical integration unmatched in the Australian market.

Skip Capital

The second-largest Australian SFO at $3.5 billion, Skip Capital maintains a broad mandate without the sector concentration seen in mining or defence-origin offices. For families seeking a benchmark for what a mid-tier, generalist private wealth office looks like in Australia, Skip Capital's scale and scope offer a useful reference.

Thorney Investments

Active positions in ASX-listed companies define Thorney's $1.5 billion portfolio. The office takes material stakes and engages directly with management teams. Institutional allocators evaluating the Australian SFO landscape will recognise Thorney as one of the more visible and research-driven firms.

Paspaley Family Office

Pearl-farming wealth gives the Paspaley family a unique origin story among Australian SFOs. The family built its $1.3 billion fortune in the pearling industry and has since diversified well beyond those roots. This transition from a niche commodity business to a broad wealth platform shows how single-industry families can restructure capital for long-term preservation.

Bower Capital (Darren Harvey Family Office)

Fixed-income specialisation sets Bower Capital apart from every other Australian SFO. Darren Harvey built the office in 2001 after a career trading interest rate derivatives at Deutsche Bank. In 2011, Harvey co-founded a fixed-income management firm that has since grown to oversee $17 billion. Families seeking quantitative fixed-income approaches will find Bower Capital's lineage relevant.

Marinya Capital (John Fairfax Family)

One of Australia's oldest media dynasties, the John Fairfax family, entrusts Marinya Capital with $500 million in diversified assets. The office has moved well beyond its newspaper-industry origins. A separate Fairfax branch, the Vincent Fairfax family, operates Cambooya with $250 million in capital managed, showing how succession planning can produce distinct offices from a single founding fortune.

Investment Trends Shaping This Market

Project Concession Exits Reshaping Portfolios

Olbia's experience shows a broader pattern among Australian SFOs: the conversion of long-dated operating assets into liquid portfolios. The expiry of Olbia's Sydney Harbour Tunnel contract in 2022 marked the end of a 34-year concession. As similar contracts mature, Australian wealth managers are rotating capital into private equity and venture deals. This transition demands new capabilities that differ sharply from managing toll-road cash flows.

Clean Energy Capital Flows

Australia's shift from mining and agriculture toward renewable energy opens new deal pipelines for family offices. Wind, hydrogen, solar, and critical minerals represent the next wave of large-scale project allocations. For an office like Olbia, with deep engineering and public works roots, this transition maps closely onto existing expertise, even as it requires updated technical diligence.

Inbound UHNW Migration Expanding the Ecosystem

The Significant Investor Stream visa, requiring A$5 million in qualifying capital deployment, channels international wealth into Australia. With 122,000 millionaires expected to migrate (primarily from China, India, and the UK), the local private wealth ecosystem is growing fast. Industry research estimates roughly 2,000 family or private offices now operate in Australia, a 150% increase over the past decade. This growth creates both co-investment partners and competition for deal flow.

Grandfathered Structures Under Scrutiny

Over 1,119 large proprietary companies in Australia remain exempt from lodging financial reports with ASIC under a 1995 grandfathering provision. Olbia Pty Limited is among them. Public reporting shows that Olbia generated nearly A$1.5 billion in total income over three financial years while recording zero tax paid. Growing calls for transparency may force structural changes that affect how these offices report and operate.

How to Evaluate an Olbia-Style Family Office

Olbia's status as a grandfathered entity means standard due diligence tools fall short. AUM claims from Australian SFOs operating as "dark companies" cannot be verified through public ASIC filings. Families considering engagement with any office on the grandfathered list should request audited accounts directly, since no regulatory filing requirement exists.

Verifiable exits matter more than stated AUM in this market. Olbia's credibility rests on documented transactions: A$775 million to BAE Systems, A$300 million to Downer EDI. Prospective partners or co-investors should seek similar proof points rather than relying on self-reported portfolio values.

Clear family governance is essential when dealing with multi-generational SFOs. The Salteri office has transitioned from Carlo (founder) to Paul and Robert (second generation). Families evaluating Olbia or comparable offices should ask how decision-making authority distributes and whether third-generation succession plans are formalised.

Australia's lack of inheritance tax simplifies estate planning but does not eliminate oversight risk. The Transfield demerger of 1995, triggered by a feud between the Salteri and Belgiorno-Nettis families, cost both sides operational continuity and public reputation. Prospective partners should assess whether formal family oversight structures exist to prevent similar fractures.

Which Family Office Fits Your Needs?

UHNW families with engineering or defence-sector wealth will find Olbia Investments the most directly relevant office in the Australian SFO landscape. Its four-pillar strategy (project concessions, private equity, venture, public markets) and proven exit record offer a blueprint for converting industrial fortunes into diversified portfolios. Unlike multi-family offices that serve multiple clients, each SFO listed here manages capital for a single dynasty, with direct investments tailored to that family's expertise.

Business owners planning a major liquidity event should study Olbia's playbook closely. The staged exit from Tenix (defence arm sold in 2008, remaining assets in 2014) demonstrates how a family can monetise an operating business over time while keeping control of the process. Bower Capital offers a different model: a founder who built a private wealth office from trading expertise, then scaled it into a $17 billion institutional fixed-income platform.

Next-generation wealth holders and advisors exploring the Australian market should note that most SFOs here operate through opaque corporate structures. Direct engagement typically requires warm introductions, since offices like Olbia, Paspaley, and Marinya Capital do not maintain public-facing advisory platforms. The Cages Foundation, Paul and Sandra Salteri's charitable vehicle supporting Aboriginal communities, offers one of the few visible touchpoints for the Salteri family's broader civic presence.

Methodology

This article on the Olbia family office draws on public corporate records, ASIC filings, Australian Electoral Commission data, and Rich List rankings. Deal records (BAE Systems, Downer EDI transactions) were verified through public announcements. AUM figures reflect estimates from specialist databases tracking single family offices with Australian operations. Where offices operate as grandfathered entities with no public reporting obligation, stated AUM figures should be treated as estimates rather than audited values. All data reflects the most recent publicly available information as of 2026.