What King Street Properties does

King Street Properties is a privately held real estate investment management firm founded in 2004 and headquartered in Boston that specializes exclusively in science-based real estate. As of the source data, the company operates a portfolio of approximately 7 million square feet across 22 institutional-grade life science and biomanufacturing properties in five core U.S. research clusters: Greater Boston, New York, the Research Triangle, San Diego, and the San Francisco Bay Area. Tenants span major pharmaceutical manufacturers (Novartis, GSK, Takeda, Novo Nordisk, Sun Pharma), early- and mid-stage biotechnology firms (Voyager Therapeutics, Arrakis Therapeutics, Liquidia, WaVe Life Sciences, Terrestrial Bio/Vaxess), medical device and diagnostic companies (Rover Diagnostics, Interfacial Consultants), academic and clinical research institutions (Duke, BioLabs@NYU Langone, UL Research Institutes), and adjacent clean-tech users (Commonwealth Fusion Systems).

King Street's core offering is purpose-built life science real estate, ranging from turnkey spec laboratory suites (typically 8,500 to 17,700 SF) designed for immediate occupancy, to large custom-built campuses for advanced manufacturing and headquarters needs. Flagship properties include Allston Labworks (585,000 SF mixed-use campus in Allston, MA), The Landing (503,500 SF in Burlingame, CA), Pathway Devens (750,000 SF purpose-built multi-tenant biomanufacturing campus in Devens, MA), Pathway Triangle (978,000 SF across six planned buildings in Morrisville, NC), and Arc UTC/Esplanade (241,963 SF in San Diego). The proprietary Pathway platform is engineered specifically for GMP-compliant biomanufacturing tenants and is reported to reduce time to occupancy by 18-24 months relative to traditional build-out, with newly built or renovated lab space commanding rent premiums of up to 12%.

The business model is recurring long-duration commercial leasing: King Street generates rental revenue from multi-year (life science average ~142 months versus ~44 months for typical office) leases of laboratory, advanced manufacturing, and specialized flex space. The vertically integrated operating model combines acquisition, development, asset management, and tenant relations within a single firm. Tenant origination runs through direct enterprise engagement, supplemented by channel partnerships with major commercial brokerage firms (JLL, CBRE, Cushman & Wakefield, Newmark) and joint-venture co-investment on individual property acquisitions. Pricing is negotiated on a per-lease basis and is not publicly disclosed. The firm is led by Founder/Principal Thomas Ragno, with a senior team of partners and managing directors including recent hires dedicated to the California and North Carolina regional portfolios.

Name

King Street Properties

Legal name

King Street Properties

Website

https://kingstreetproperties.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

King Street Properties is a Boston-based, private real estate investment management firm that develops, owns, and operates approximately 7 million square feet of purpose-built life science and biomanufacturing real estate across 22 properties in Greater Boston, New York, the Research Triangle, San Diego, and the San Francisco Bay Area, serving pharmaceutical, biotech, medical device, and clean-tech tenants.

Ownership category

akta.pro rank

Product category

Life Science Real Estate

NAICS

Lessors of Nonresidential Buildings (except Miniwarehouses) (531120), Lessors of Other Real Estate Property (53119), Real Estate and Rental and Leasing (53), Real Estate (531)

SIC

Lessors Of Real Property, Nec (6519), Investors, Nec (6799), Operative Builders (1531), Real Estate Dealers (For Their Own Account) (6532)

akta.pro primary industry

Life Sciences/Laboratory Property Management (BPAJAGAL)

akta.pro secondary industries

Life Sciences/Lab Tenant Representation (BPAJALAG), Healthcare & Medical Office Property Management (BPAJAGAF)

Keywords

• Life science real estate
• Biomanufacturing facilities
• Laboratory space leasing
• R&D property development
• Commercial real estate investment

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Supply Chain, Marketing or Sales

Revenue model

1. Commercial Real Estate Leasing: King Street Properties generates revenue through leasing laboratory, office, and advanced manufacturing space to life science companies. They own and operate 7 million square feet of life science real estate across 22 properties in core science submarkets including Greater Boston, New York, the Research Triangle, San Diego, and the San Francisco Bay area. Revenue comes from long-term commercial leases with tenants ranging from startups to large pharmaceutical companies.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

King Street Properties is a private real estate investment management firm that acquires, develops, owns, and operates life science and biomanufacturing real estate on a national basis. It leases laboratory, R&D, office, and advanced manufacturing space to pharmaceutical, biotechnology, medical device, and clean tech tenants under long-term agreements. Its offering includes purpose-built campuses, GMP-compliant biomanufacturing facilities, and move-in ready spec suites, delivered through a vertically integrated platform.

Product overview

King Street Properties operates as a private real estate investment management firm offering a portfolio of life science and biomanufacturing properties. The company's portfolio includes purpose-built life science campuses (Allston Labworks, The Landing), biomanufacturing campuses (Pathway Devens, Pathway Triangle, Pathway RTP), and converted lab/office properties across Greater Boston, New York, Research Triangle, San Diego, and the San Francisco Bay Area. The properties range from turnkey spec suites for early-stage companies to large-scale advanced manufacturing facilities for pharmaceutical companies. King Street's portfolio totals approximately 7 million SF across 22 properties.

Differentiator

Problem solved

Functional benefit

Brands

• Pathway: Customizable science real estate solution for advanced manufacturing needs, including Pathway Devens (Devens, MA), Pathway Triangle (Morrisville, NC), and Pathway RTP (Research Triangle Park, NC)
• Allston Labworks
• The Landing
• Mesa Labworks
• EastRidge at Perimeter Park
• Innolabs
• Arc UTC

Products and services

• Allston Labworks 585,000 SF mixed-use life science campus in Allston, MA featuring Class A laboratory space alongside residential apartments, retail, and open-air community areas. Leased to biotech and pharmaceutical tenants.
• The Landing 503,500 SF life science development in Burlingame, CA, comprising two Class A laboratory and office buildings connected via a public plaza, serving Bay Area biotech and life science tenants.
• Pathway Devens 750,000 SF biomanufacturing campus in Devens, MA, designed as the world's first multi-tenant, purpose-built biomanufacturing facility. Leased to pharmaceutical and advanced manufacturing tenants including Commonwealth Fusion Systems.
• Pathway Triangle 978,000 SF biomanufacturing campus in Morrisville, NC in the Research Triangle, anticipated across six buildings, leased to pharmaceutical manufacturers including Novartis and Liquidia.
• Pathway RTP 95-acre pad-ready campus in Research Triangle Park, NC, offering build-to-suit options or a campus site plan with 4 buildings for advanced manufacturing and R&D uses.
• EastRidge at Perimeter Park 479,000 SF flex/office and life science park in Morrisville, NC, undergoing conversion to an institutional-quality life science campus, with tenants including UL Research Institutes.
• Innolabs 266,800 SF Class A life science project in Long Island City, NY, featuring multi-tenant floors and purpose-built lab infrastructure, including a 46,000 SF biotech incubator with BioLabs@NYU Langone.
• Arc UTC (Esplanade) 241,963 SF multi-building life science campus in San Diego's University Town Center (UTC) cluster, comprising three research buildings acquired in late 2024.
• Mesa Labworks 62,000 SF life science campus in San Diego's Sorrento Mesa submarket, converted from flex office to move-in ready labs with modern infrastructure, with tenants including Interfacial Consultants.
• 100-125-150 Cambridgepark Drive 684,000 SF campus in Cambridge, MA consisting of three buildings next to Alewife station, with outdoor event space and on-site amenities for life science tenants.
• 200 Cambridgepark Drive 222,000 SF office/laboratory building in Cambridge's Alewife area, originally built for a major pharmaceutical company.
• 733 Concord Avenue 44,000 SF life science building in Concord, MA, 100% leased to WaVe Life Sciences for nucleic acid therapeutics R&D.
• Research Laboratory (Durham) 51,174 SF life science building in Durham, NC, 100% occupied by the Duke Clinical Research Institute for clinical research.
• Carmichael Building 114,000 SF R&D lab space in downtown Durham, NC, 100% leased to Duke University.
• 359 Allston Street 7,517 SF life science building in Cambridge, MA, fully leased as the headquarters of Vaxess Technologies (now Terrestrial Bio) for vaccine technology development.
• 828-830 Winter Street 327,000 SF lab building in Waltham, MA featuring cutting-edge MEP systems, originally developed by King Street in a joint venture from 2015 onward.
• 1499 Bayshore Approximately 320,000 SF life science development opportunity in Burlingame, CA currently in permitting, extending the firm's Bay Area pipeline.
• First 460,000 SF life sciences campus in Waltham, MA featuring two 5-story buildings with high visibility signage for life science tenants.
• 287 Western Ave 95,000 SF development in Allston, MA featuring Class A laboratory and office suites with flexible high bay space for life science tenants.

Quantifiable outcome

• Reduces time to occupancy by 18-24 months compared to traditional build-out
• +2 more outcomes

Named customers12 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Nine partnerships are on record, tiered core, key and secondary.

• GFP Real EstatecoreStrategic or Co-development PartnerGFP Real Estate is a Manhattan-based development partner collaborating with King Street Properties on the Innolabs project in Long Island City, NY. King Street Properties serves as the Boston-based developer while GFP Real Estate contributes local New York development expertise.
• Perkins & WillkeyTechnology or IntegrationPerkins & Will serves as the architect for The Landing in Burlingame and other King Street Properties projects. The firm designed the campus as a purpose-built life science environment with flexible infrastructure supporting diverse research needs.
• BW Kennedy & Co. (BWK)keyImplementation/ SI/ Consulting PartnerBW Kennedy & Co. serves as general contractor for multiple Pathway Devens buildings. The partnership has resulted in construction of five buildings at the biomanufacturing campus.
• Hathaway DinwiddiekeyImplementation/ SI/ Consulting PartnerHathaway Dinwiddie serves as general contractor for The Landing development in Burlingame, CA.
• SWA GroupsecondaryTechnology or IntegrationSWA Group serves as landscape architect for The Landing campus in Burlingame.
• JLLkeyChannel Partner/ Reseller/ DistributorJLL (Jones Lang LaSalle) handles leasing for The Landing property and represents King Street in multiple transactions across their portfolio.
• CBREkeyChannel Partner/ Reseller/ DistributorCBRE represented King Street Properties in the Novartis lease transaction at Pathway Triangle.
• Cushman & WakefieldkeyChannel Partner/ Reseller/ DistributorCushman & Wakefield brokered the UL Research Institutes lease at EastRidge and provides tenant representation services.
• NewmarksecondaryChannel Partner/ Reseller/ DistributorNewmark represented the seller in the acquisition of 359 Allston Street.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Alexandria Real Estate Equities: The largest pure-play publicly traded life science REIT. Operates mission-critical lab and biomanufacturing campuses across the same major US clusters (Boston, SF Bay, San Diego, NYC, Research Triangle), directly competing for tenants like Novartis, GSK, and Takeda.
• BioMed Realty (Blackstone): Private life science REIT owned by Blackstone; one of the largest owners of life science real estate. Competes head-to-head in Cambridge/Boston, San Diego, and the Bay Area with similar turnkey lab and GMP-capable product.
• Wexford Science & Technology: Developer and operator of purpose-built, mixed-use life science and innovation districts; competes for institutional and university-anchored life science tenants across major US research hubs.
• IQHQ: San Diego-headquartered life science real estate developer focused on large-scale, purpose-built lab and biomanufacturing product — direct competitor in Southern California and gateway US life science clusters.
• Longfellow Real Estate Partners: Boston-based vertically integrated life science developer and operator; competes closely with King Street in Greater Boston, the Bay Area, and Research Triangle on both spec lab and build-to-suit product.

Broad incumbents

• Kilroy Realty: Diversified West Coast office REIT with an established life science platform concentrated in California. Competes for Bay Area and San Diego tenants like those targeted by King Street's California assets (The Landing, Mesa Labworks).

Emerging players

• Trinity Hunt Partners: Private equity-backed real estate investor with growing life science and R&D focus; positioned as a smaller, faster-moving competitor pursuing similar lab/biomanufacturing opportunities in Tier-1 US markets.
• Breakline Capital: Newer entrant focused on purpose-built life science and biomanufacturing facilities; competes with King Street's Pathway approach by offering turnkey, GMP-ready space to emerging therapeutics and CDMOs.
• Anchor Health Properties: Specialized developer of medical office and healthcare-adjacent facilities with growing exposure to life science tenants; adjacent competitor for capital-constrained academic and biotech tenants.

Others

• Newmark Group: Commercial real estate services and capital markets firm; competes less on ownership but acts as a leasing advisor and capital provider in many of the same transactions where King Street participates as principal.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/ksprop
• LinkedInlinkedin.com/company/king-street-properties-llc

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about King Street Properties