Top Family Offices in Portsmouth 2026

Key Facts at a Glance

• Roughly 10 to 15 family offices and advisory practices serve the Portsmouth, NH area. These include shared family offices, multi-family offices (MFOs), independent registered investment advisors (RIAs), and broker-dealer affiliated firms.
• Combined assets under management (AUM) for major Portsmouth-area firms exceed $7 billion. Sunpointe Investments leads with $4.1 billion in assets serviced, and Lake Street Advisors follows at $3.1 billion in regulatory AUM.
• Market Street Trust Company is the only client-owned shared family office in the region. It serves roughly 45 family groups, with origins tracing to 1909.
• Portfolio minimums range from $500,000 at Granite Bay Wealth Management to $1 million at Seascape Capital Management. Wolf Pine Capital charges a flat 0.65% of managed assets.
• New Hampshire's lack of state income tax and favorable trust laws make Portsmouth a strong base for wealth planning and trust operations.
• The market includes two trust companies, multiple fee-only RIAs, and several broker-dealer affiliated advisory groups tied to national platforms.

Family Offices in Portsmouth, New Hampshire

Portsmouth serves as the primary wealth management hub for the NH Seacoast region. The city's appeal rests on two structural pillars. New Hampshire charges no state income tax, and the state's trust laws rank among the most favorable nationally. Market Street Trust Company chose Portsmouth specifically for its trust situs.

The local market covers every major office type. Market Street Trust operates as the area's sole client-owned shared family office. Lake Street Advisors and Sunpointe Investments function as multi-family office platforms with institutional scale. Independent RIAs like Charter Oak Capital Management, DHK Financial Advisors, and Seascape Capital Management serve high-net-worth families with fee-based models. Broker-dealer affiliated groups round out the options.

Recent entrants are reshaping the market. Wolf Pine Capital, founded by Peter Ankeny after roles at UBS and Lake Street Advisors, offers family office-style services at accessible minimums. Charter Oak maintains offices in both Portsmouth and Kennebunk, Maine. Proximity to Boston gives local firms access to institutional deal flow and talent. The Seacoast's boutique character attracts ultra-high-net-worth (UHNW) families who value privacy over the pace of a major metro area.

Wealth Advisor Comparison at a Glance

The following table compares leading wealth management firms in Portsmouth by type, AUM, and service model. AUM figures come from the most recent regulatory filings where available.

Family Office	Type	AUM Estimate	Investment Focus	Key Services	Location
Sunpointe Investments	Family Office / Wealth Mgmt	$4.1B serviced	Direct PE, real assets, behavioral finance	Portfolio mgmt, concierge, direct PE programs	Seacoast area
Lake Street Advisors	MFO / RIA	$3.1B regulatory	Diversified allocation, Modern Portfolio Theory	Financial planning, asset allocation, family office services	Portsmouth, NH
Market Street Trust Company	Shared Family Office	—	Integrated multigenerational wealth mgmt	Financial planning, tax, charitable giving, oversight, trustee	Portsmouth, NH
Charter Oak Capital Mgmt	Independent RIA	$983M	Fee-based investing, direct indexing	Portfolio mgmt, financial planning	Portsmouth, NH
DHK Financial Advisors	Independent RIA	$658M–$1.3B	Diversified (mutual funds, ETFs, alternatives)	Portfolio mgmt, pension consulting	Portsmouth, NH
Granite Bay Wealth Mgmt	Independent RIA	$444M+	Asset mgmt, financial planning	Asset mgmt, pension consulting	Portsmouth, NH
Seascape Capital Mgmt	Boutique RIA	$400M+	Quantitative and qualitative analysis	Portfolio mgmt, retirement planning	Portsmouth, NH
Cornerstone Financial Planning	Fee-Only RIA / B Corp	$249M	Socially responsible investing	Tax, insurance, estate, retirement planning	Portsmouth, NH
White Mountain Wealth Mgmt	Broker-Dealer Affiliate	—	Intergenerational wealth mgmt	Oversight, legacy planning, trust, banking	Portsmouth, NH
Wolf Pine Capital	Independent RIA	—	Family office-style personalized services	Financial planning, capital deployment, wealth transfer	Portsmouth, NH

Lake Street Advisors and Sunpointe Investments anchor the market in scale. Families seeking a true shared family office model will find only Market Street Trust in that category locally. The remaining firms deliver varying levels of family office-caliber service through RIA and broker-dealer structures.

Top Picks by Strategy

• Largest AUM: Lake Street Advisors holds $3.1 billion in regulatory AUM and serves roughly 79 high-wealth family clients. It operates the biggest fee-only multi-family office platform in the Portsmouth area.
• Leading Shared Family Office: Market Street Trust Company is client-owned and serves roughly 45 family groups. Services span portfolio management, tax planning, charitable giving, and corporate trustee duties.
• Top Pick for Direct PE and Alternatives: Sunpointe Investments services $4.1 billion in assets and builds dedicated direct private equity and real asset programs. The firm reports a 97% client retention rate.
• Strongest for Socially Responsible Investing: Cornerstone Financial Planning holds Certified B Corporation status and offers socially responsible (SRI) portfolios alongside holistic financial planning.
• Most Accessible Private Wealth Model: Wolf Pine Capital charges 0.65% of AUM with a fee-only structure. This makes family office-style advice available to emerging wealth holders below typical UHNW thresholds.
• Top for Intergenerational Wealth: White Mountain Wealth Management pairs a national broker-dealer's institutional platform with dedicated family oversight, legacy planning, and wealth transfer services.
• Standout for Quantitative Investing: Seascape Capital Management combines quantitative and qualitative analysis for portfolios above its $1 million minimum, managing over $400 million.

Leading Firms and Office Profiles

Market Street Trust Company

Roughly 45 family groups share ownership of Market Street Trust, making it the only client-owned shared family office in the Portsmouth area. This structure removes conflicts common in traditional advisory relationships. Services cover financial planning, portfolio management, tax and compliance, charitable giving strategy, oversight education, and corporate trustee duties.

The firm's heritage traces to 1909 as the single family office (SFO) for the Houghton family, founders of Corning Incorporated. That multigenerational DNA persists today. UHNW families needing a fiduciary partner with trust situs in New Hampshire, integrated wealth preservation, and succession planning will find the most complete platform here.

Lake Street Advisors

With $3.1 billion in regulatory AUM, Lake Street Advisors is the largest RIA-format wealth firm in Portsmouth by a wide margin. The firm serves about 79 high-wealth family clients on a fee-only basis, eliminating commission conflicts. Its approach centers on Modern Portfolio Theory, emphasizing diversified asset allocation over active stock picking.

Lake Street provides discretionary and non-discretionary management alongside holistic financial planning. High-net-worth families wanting institutional-grade multi-family office services with fee-only alignment will find Lake Street's scale hard to match locally.

Sunpointe Investments

Sunpointe builds direct private equity and real asset programs tailored to individual families, setting it apart from every other firm in the Portsmouth market. The firm services $4.1 billion in assets and reports 97% client retention. Its approach integrates behavioral finance principles to reduce emotional bias in portfolio decisions.

Concierge services handle administrative complexity by coordinating with legal and tax professionals. Families who want alternatives exposure beyond traditional stocks and bonds, especially direct investments and co-investment in private markets, will find the most specialized platform here.

Charter Oak Capital Management

Nearly $1 billion in AUM gives Charter Oak meaningful scale for an independent RIA. The firm's direct indexing capability sets it apart from Portsmouth peers. Clients own individual securities that replicate an index while harvesting tax losses at the security level.

Charter Oak operates from both Portsmouth and Kennebunk, Maine. This dual presence benefits families with assets or property in both states who want a single fiduciary advisor managing the full picture.

White Mountain Wealth Management

White Mountain focuses on intergenerational wealth management and family oversight, backed by a national broker-dealer's institutional resources. Its service menu is broader than most local RIAs: banking, lending, insurance, annuities, trust services, and risk management sit alongside portfolio management.

Families with complex needs spanning multiple financial products gain access to a consolidated platform. The firm's legacy planning and wealth transfer focus makes it a strong fit for families navigating generational transitions.

Wolf Pine Capital

Peter Ankeny founded Wolf Pine Capital to deliver family office-caliber service to clients below traditional UHNW minimums. Ankeny's prior experience at UBS and Lake Street Advisors shapes the firm's model: fee-only at 0.65% of AUM, covering financial planning, capital deployment, and wealth transfer.

This is the most accessible entry point to private wealth advisory in Portsmouth. Emerging high-net-worth families, first-generation wealth creators, and next-generation inheritors who need hands-on guidance without million-dollar thresholds should consider Wolf Pine first.

Cornerstone Financial Planning

Cornerstone is the only Certified B Corporation financial planning firm in the Portsmouth market, signaling verified social and environmental accountability. The firm requires a $750,000 minimum portfolio and offers fee-only, holistic planning. Services cover tax strategies, insurance, estate planning, retirement, cash flow analysis, and portfolio management.

Its SRI portfolios screen for environmental and social criteria. Values-driven families who want their allocations aligned with their principles, and accept the constraints that SRI screening imposes, will find a genuine match here.

Seascape Capital Management

Seascape manages over $400 million using a blend of quantitative and qualitative analysis. The firm sets a $1 million minimum, positioning it firmly in the HNW tier. Its boutique scale means fewer client relationships and more direct access to portfolio managers.

This data-driven, research-intensive model suits investors who prefer analytics over relationship-heavy advisory. Seascape covers portfolio management, retirement planning, and broader financial planning from its Portsmouth base.

Trends Shaping the Portsmouth Wealth Market

Direct Private Equity and Real Asset Programs

Sunpointe Investments leads a shift among Portsmouth firms toward building in-house direct private equity programs rather than relying on fund-of-funds structures. This approach gives families more control over deal selection and lower fee layers. Real asset allocation, including direct holdings in tangible property and resources, complements these strategies for families seeking inflation protection.

Tax-Efficient Strategies Under NH's No-Income-Tax Framework

Portsmouth firms structure portfolios to maximize New Hampshire's absence of state income tax on earned and capital gains. NH trust law permits dynasty trusts that can last for centuries and directed trusts that separate portfolio management from fiduciary oversight. Market Street Trust leverages these provisions for families establishing or relocating trust situs to the state.

Socially Responsible and Values-Aligned Investing

Cornerstone Financial Planning's B Corp certification and SRI portfolios reflect growing demand from next-generation wealth holders in the Seacoast market. Sunpointe also builds value-aligned portfolios for families who want ethical screens without sacrificing alternatives exposure. In practice, younger inheritors in the Portsmouth region are pushing for environmental and social criteria in family wealth policies.

Smaller Firms Expanding the Private Wealth Model

Wolf Pine Capital's launch signals a broader trend: boutique practices offering family office-level service without requiring $10 million or more in assets. At 0.65% of AUM on a fee-only basis, Wolf Pine undercuts most broker-dealer affiliated competitors on cost while matching their service scope. Several Portsmouth RIAs now frame their offerings in family office terms, reflecting client demand for coordinated, holistic wealth management at lower entry points.

Multigenerational Wealth Transfer and Succession Planning

Market Street Trust and White Mountain Wealth Management lead on structures that prepare the next generation. Market Street's education programs and oversight frameworks stem from over a century of multigenerational experience. As the baby boomer wealth transfer accelerates, Portsmouth firms are building formal succession planning processes tied to local trust law advantages.

Choosing the Right Wealth Advisor in Portsmouth

Fee structures in this market span a wide range. Lake Street Advisors and Wolf Pine Capital operate as fee-only fiduciaries, while White Mountain Wealth Management earns commissions through its broker-dealer affiliation. Verify whether your advisor holds a fiduciary duty or merely a suitability standard before signing on.

The term "family office" means different things here. Market Street Trust is the only client-owned shared family office, providing family governance, charitable giving strategy, corporate trustee services, and portfolio management under one roof. Many local firms use family office language but deliver standard wealth management. Test the label by asking whether the firm handles tax compliance, trust administration, and family education alongside portfolio work.

NH trust situs is a specific advantage worth evaluating. If your estate plan includes dynasty trusts or directed trusts, confirm that the firm has direct experience structuring trusts under New Hampshire law. Market Street Trust serves as a corporate trustee, and a regional trust company also operates locally. That said, most independent RIAs refer trust work to external partners.

Minimums vary from $500,000 at Granite Bay Wealth Management to $1 million at Seascape Capital. Families with $500,000 to $2 million in investable assets will find several capable RIAs locally. Those above $10 million should evaluate Market Street Trust, Lake Street Advisors, and Sunpointe for true family office breadth.

Which Wealth Firm Fits Your Needs?

UHNW families managing generational wealth above $25 million should evaluate Market Street Trust Company first. Its client-owned shared family office model, oversight programs, and corporate trustee capabilities represent the most complete platform in Portsmouth. Lake Street Advisors offers a strong alternative for families wanting fee-only, institutional-scale multi-family office services with $3.1 billion in regulatory AUM.

Business owners seeking direct private equity exposure will find Sunpointe Investments' $4.1 billion platform purpose-built for that goal. Families in the $500,000 to $5 million range who want personalized, family office-style advice at lower cost should consider Wolf Pine Capital's 0.65% fee-only model. Cornerstone Financial Planning is the clear choice for families who require socially responsible portfolios backed by B Corp-certified accountability.

Families with complex needs in banking, lending, insurance, and portfolio management can consolidate through White Mountain Wealth Management's broker-dealer platform. Those with property or business interests in both New Hampshire and Maine gain a practical benefit from Charter Oak Capital Management's dual-state presence. The right fit depends on matching your wealth structure and planning needs to the firm's core strengths.

Methodology

This guide to family office Portsmouth NH options draws from SEC regulatory filings, FINRA BrokerCheck records, firm websites, and publicly available advisory data. AUM figures reflect the most recent filings from 2024 and 2025. Some firms report regulatory AUM (which includes non-discretionary assets) while others report only discretionary AUM, so direct comparisons require context.

The evaluation covered AUM where available, breadth of services, fiduciary status, office type, and confirmed presence in the Portsmouth area. The guide spans shared family offices, multi-family offices, independent RIAs, and broker-dealer affiliated practices serving the NH Seacoast region. Office profiles rely on data confirmed through regulatory records and firm disclosures rather than self-reported marketing claims.