4S Bay Partners
4S Bay Partners is a privately held single-family office founded in 2015 by the Sarowitz family after the Paylocity IPO, deploying permanent impact-focused capital across venture capital, private equity, real estate, and public equities for underserved communities and diverse managers in the United States.
- Company typePrivate
- Founded2015
- HeadquartersHighland Park, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What 4S Bay Partners does
4S Bay Partners LLC is a privately held single-family office founded in 2015 by the Sarowitz family following the Initial Public Offering of Paylocity Corporation. Headquartered at 1849 Green Bay Road, Suite 280, Highland Park, Illinois, the firm employs between 11 and 50 people and operates across multiple asset classes, including venture capital, private equity, real estate, public equities, and fixed income. All investment activity is governed by a stated mission to eliminate prejudice and societal inequities, with a particular emphasis on inclusion, racial equity, gender equality, and sustainable stewardship. The Managing Partner is Jessica Sarowitz, and the Chief Investment Officer is Jim Casselberry.
The firm offers five core investment products: Direct Private Equity or Venture Capital Investments, PE or VC Fund Investments, Real Estate Investments, Public Equities/Funds/ETFs, and Single-Family Office Services (which include personal assistance, travel planning, financial administration, accounting, tax/estate planning, and legal/risk management). It also runs a Private Giving program through affiliated organizations. Notable recent direct investments include Haven Global Partners (2019 GP stake, where AUM grew from $75M to over $1.1B), Firefly Aerospace (2024 Series D), Nile Capital Group (2025 GP-stakes fund), and Ampaire (Q1 2026 sustainable aviation). The flagship real estate project is Stocker Street Creative, a 250,000-square-foot multi-use film campus in Baldwin Hills, California, targeting 2027 completion and pursuing LEED Gold certification.
The business model rests on permanent family capital derived from the Paylocity IPO liquidity event, with no external LPs or public shareholders. Distribution is exclusively direct: the firm sources and executes investments, fund commitments, and real estate developments through proprietary deal flow built on long-standing relationships with community partners including the Los Angeles Urban League, Depaul USA, Jane Goodall Institute, Field Museum, La Salle University, and Heart of the City. Marketing is light, comprising a corporate blog, occasional PR Newswire releases, philanthropic-event sponsorships (e.g., Pan African Film Festival, CAST LA Gala), and project-level community outreach. Geographic footprint covers Illinois, California, and Pennsylvania within the United States.
4S Bay Partners firmographics
Firmographics- Name
- 4S Bay Partners
- Legal name
- 4S Bay Partners LLC
- Website
- https://4sbay.com
- Company type
- Private
- Founded year
- 2015
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- 4S Bay Partners is a privately held single-family office founded in 2015 by the Sarowitz family after the Paylocity IPO, deploying permanent impact-focused capital across venture capital, private equity, real estate, and public equities for underserved communities and diverse managers in the United States.
- Ownership category
- akta.pro rank
4S Bay Partners industry classification
Industry- Product category
- Family Office Investment Services
- NAICS
- Portfolio Management and Investment Advice (523940), Other Financial Investment Activities (5239), All Other Financial Investment Activities (52399)
- SIC
- Investment Advice (6282), Security Brokers, Dealers & Flotation Companies (6211)
- akta.pro primary industry
- Single-Family Offices (SFOs) (FSAAADAA)
- akta.pro secondary industries
- Family Office Investment Platforms & Direct Investing (PE/VC/Co-Invest) (FSAAADAH), Sustainable Private Markets (Impact PE/VC, Private Credit, Infrastructure) (FSAAALAG), Family Office Advisory (Single/Multi-Family) (FSAEAAAI)
Keywords
Where 4S Bay Partners is headquartered
LocationHeadquarters
- HQ city
- Highland Park
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
4S Bay Partners business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Others, Infrastructure
Revenue model
- Investment Returns: 4S Bay generates returns through investment appreciation, dividends, interest, and capital gains across its portfolio of direct PE/VC investments, fund investments, real estate, and public equities.
- Private Giving: Through affiliated organizations and private giving, the firm provides monetary and organizational support to mission-aligned causes.
Go-to-market motion1 record
Distribution channels4 records
Marketing channels5 records
4S Bay Partners product offering
Product offeringCore offering
4S Bay Partners LLC operates as a single-family office that deploys private capital across multiple asset classes including direct venture capital and private equity investments, fund investments, real estate development, and public equities. All investments emphasize inclusion, racial equity, gender equality, and sustainable stewardship, with a mission to eliminate prejudice and societal inequities through targeted capital deployment in underserved communities.
Product overview
4S Bay Partners LLC is a single-family office founded in 2015 that offers a diversified platform of investment products and services. The core investment offerings include Direct Private Equity or Venture Capital Investments, PE or VC Fund Investments, Real Estate Investments, and Public Equities, Funds and ETFs. These investment products span multiple asset classes including venture capital (early and late stages), private equity (growth), real estate, public equity, and fixed income (both public and private). The company also provides single-family office services including personal assistance, travel planning, financial administration and advisory, accounting, tax/estate planning, and legal/risk management services. Additionally, through affiliated organizations and direct giving, 4S Bay offers philanthropy and private giving programs. All investments emphasize inclusion, racial equity, gender equality, and sustainable stewardship, focusing on sectors including Diversity/Gender/Inclusion, Educational Opportunity, Immigration & Human Rights, Environmental Protection, Preservation of Cultural Heritage, and Wellness.
Differentiator
Problem solved
Functional benefit
Products and services
- Direct Private Equity or Venture Capital Investments Direct equity investments into venture or growth-stage private companies that meet both mission criteria (diversity, gender equity, environmental sustainability) and financial return requirements, with a focus on supporting emerging and diverse managers.
- PE or VC Fund Investments Fund investments in private equity and venture capital funds that align with the firm's mission framework and impact mandate.
- Real Estate Investments Real estate investments and development projects that increase economic activity in underdeveloped neighborhoods while generating positive returns, including affordable housing, mixed-use developments, and creative campuses.
- Public Equities, Funds and ETFs Active or passive investment strategies into public markets, including equities, mutual funds, and ETFs, deployed in accordance with 4S Bay's mission guidelines.
- Single-Family Office Services Customized solutions for family lifestyle and entrepreneurial business needs, including personal assistance, travel planning, custom portfolio financial administration and advisory, accounting, tax/estate planning, and legal/risk management consulting.
- Private Giving and Philanthropy Monetary and organizational support through affiliated organizations and direct giving, focused on community empowerment, sustainable development, diversity, gender equity, immigration and human rights, environmental protection, and cultural preservation.
Quantifiable outcome
- Haven Global Partners AUM grew from $75M to over $1.1 billion (14x growth) since 4S Bay's 2019 investment
- +4 more outcomes
Companies that use 4S Bay Partners
Customer profileNamed customers5 records
Segments5 records
Ideal customer profiles2 records
4S Bay Partners technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
4S Bay Partners partnerships and signals
Strategic signalPartnerships
Twelve partnerships are on record, tiered core, major and minor.
- Depaul USAcore4S Bay partnered with Depaul USA to support the development of the first DAX Program dormitory in Philadelphia, serving housing-insecure college students.
- Jane Goodall InstitutemajorPhilanthropic partnership between 4S Bay Managing Partner Jessica Sarowitz and the Jane Goodall Institute, which advances community-led conservation.
- Field Museummajor4S Bay supports the Field Museum, with Jessica Sarowitz championing diversity, equity, and inclusion efforts. Lead supporter of Native Truths: Our Voices, Our Stories exhibition.
- La Salle UniversitycoreLa Salle University partnered with 4S Bay on investment in Northwest Philadelphia, including the St. Vincent's Home Project addressing homelessness in Germantown.
- Pantheon Business ConsultingcoreCommunity partner for Stocker Street Creative project, providing property management and project development consulting services.
- Daughrity Real EstateminorCommunity partner for Stocker Street Creative redevelopment project in Baldwin Hills.
- Stewart ManhattanminorCommunity partner for Stocker Street Creative redevelopment project.
- Jenkins, Gales & MartinezminorCommunity partner for Stocker Street Creative redevelopment project.
- Bastien and AssociatesminorCommunity partner for Stocker Street Creative redevelopment project.
- Los Angeles Urban LeaguecorePartnership with Stocker Street Creative focused on extensive job training and placement for local youth, developing programs for employment in film, set development, sound recording, and technical specialties.
- Yes 2 JobscorePartnership with Stocker Street Creative for job training and youth employment programs in the Baldwin Hills/Crenshaw area.
- Heart of the Citymajor4S Bay has been a valued grantee since Jessica Sarowitz served as founding board member in 2014. Organization provides soccer and youth development serving 1,100+ youth in Lake County.
Scale indicators9 records
Recent moves6 records
Expansion highlights5 records
4S Bay Partners competitors and assessment
Company assessmentDirect peers
- Kapor Capital: Mitch Kapor's family-office-style impact venture fund investing in early-stage companies addressing economic opportunity and equity gaps — comparable in mission focus on diverse founders and underserved communities.
- Pritzker Private Capital: Family-office-backed private equity firm investing in middle-market operating companies — comparable to 4S Bay's direct private equity investment activity and family-office capital base.
- Builders Vision: Single-family office of Mark and Julia Bezos that invests across venture, private equity, real estate, and public markets with explicit impact and sustainability mandates — closely mirrors 4S Bay's multi-asset, mission-aligned investment platform.
- Omidyar Network: Pierre Omidyar's impact-focused investment firm that deploys capital across for-profit and nonprofit ventures with explicit social outcomes focus — directly comparable to 4S Bay's dual financial-and-impact mandate.
- New Island Capital: Impact-investing advisory firm managing capital for families and foundations across private equity, real assets, and public markets — closely comparable to 4S Bay's impact-mandated, multi-asset family-office structure.
- Caprock Group: Multi-family office serving ultra-high-net-worth families with investment advisory, alternative investments, and impact-aligned portfolios — comparable as a family-office investment platform spanning multiple asset classes.
Broad incumbents
- Generation Investment Management: Sustainable investment manager founded by David Blood and Al Gore applying ESG and long-horizon equity strategies — comparable in mission-driven public-equities and impact investing approach.
- Emerson Collective: Laurene Powell Jobs' single-family office and impact-focused organization that deploys capital across philanthropy, media, education, and venture — comparable to 4S Bay's mission-driven, multi-asset family office structure with an emphasis on social impact and underserved communities.
- TPG Rise (The Rise Fund): Large-scale impact private equity fund within TPG, focused on measurable social and environmental outcomes alongside financial returns — overlaps with 4S Bay's impact-and-return thesis but at substantially greater scale and as a third-party capital pool.
Regional players
- BlueHub Capital: Community development financial institution deploying capital into affordable housing, community facilities, and underserved markets — overlaps with 4S Bay's real estate and community-development thesis in U.S. urban neighborhoods.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
4S Bay Partners social profiles
Digital presence4S Bay Partners compliance and trust
Trust signalCompliance1 record
4S Bay Partners financial estimates
Financial estimateRevenue estimate
Valuation estimate
4S Bay Partners leadership team
Management profileNumber of profiles
Profiles2 records
4S Bay Partners funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
4S Bay Partners M&A and investment
M&A and investmentM&A
Investments6 records
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about 4S Bay Partners
What does 4S Bay Partners do?
4S Bay Partners LLC operates as a single-family office that deploys private capital across multiple asset classes including direct venture capital and private equity investments, fund investments, real estate development, and public equities. All investments emphasize inclusion, racial equity, gender equality, and sustainable stewardship, with a mission to eliminate prejudice and societal inequities through targeted capital deployment in underserved communities.
Is 4S Bay Partners a public or private company?
4S Bay Partners is a private company. It is classified as family owned and is currently operating.
When was 4S Bay Partners founded?
4S Bay Partners was founded in 2015. It employs 11 to 50 people.
Where is 4S Bay Partners based?
4S Bay Partners is headquartered in Highland Park, United States, in the North America region.
How does 4S Bay Partners make money?
Two revenue lines are on record. Investment Returns are the primary driver. The others are private Giving.
Who are 4S Bay Partners's main competitors?
Direct peers on record are Kapor Capital, Pritzker Private Capital, Builders Vision, Omidyar Network, New Island Capital and Caprock Group. Broad incumbents are Generation Investment Management, Emerson Collective and TPG Rise (The Rise Fund). BlueHub Capital is listed as a regional player.
Does 4S Bay Partners have an API?
No public API is recorded for 4S Bay Partners.
What industry is 4S Bay Partners in?
4S Bay Partners's product category is Family Office Investment Services. Its primary akta.pro industry code is FSAAADAA, Single-Family Offices (SFOs), with a secondary code of FSAAADAH, Family Office Investment Platforms & Direct Investing (PE/VC/Co-Invest). Its NAICS code is 523940 and its SIC code is 6282.