Lower middle market private equity firm focused on industrial technology

Union Park Capital

  • HeadquartersBoston, MA S9
  • Founded2013 S8
  • Websiteunion-park.com
  • Last verifiedNovember 5, 2026

At a glance

Latest fundUnion Park Capital III, $250M (Mar 2021) S7
Revenue range$10M to $75M S2
Check size$10M to $150M S2
Deal typesPlatform, Add-on, Growth S2
GeographyNorth America, Europe S2
SectorsEnvironmental & Waste, Industrial & Manufacturing

What Union Park Capital buys

Union Park Capital is a Boston firm that invests only in lower middle market industrial technology: the instruments, sensors, components and related services that protect quality, safety or compliance in technical settings. It backs platforms with $10 million to $75 million or more of revenue, usually with $10 million to $150 million of equity, and it buys add-ons with $1 million to $50 million or more of revenue. It publishes no EBITDA figures. Its main focus is companies based in North America and Europe, and it will look at family-held businesses, management buyouts, recapitalizations, take-privates and growth equity.

Its model is to build families of companies. Seven groups are active today, including Spheros Environmental, the environmental consulting group it formed in 2021, and two platforms launched in the past year, GAM Enterprises and AML Oceanographic. Its last announced fund was $250 million in 2021. A smaller company is most likely to meet Union Park as an add-on, especially an environmental consulting firm joining Spheros.

Recent deals

Announced in the 24 months before November 5, 2026.

DateCompanyTypeSectorSource
Oct 2026PanGISCalifornia cultural resource and environmental compliance firm added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
Sep 2026Panorama EnvironmentalSan Francisco environmental planning and permitting firm added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
Aug 2026Schaeffler Ultra Precision Drives assetsGAM bought gearbox technology and related assets from Schaeffler, forming GAM-Melior in GermanyAdd-onIndustrial & ManufacturingSource
Mar 2026KP EnvironmentalCalifornia environmental planning and permitting consultant added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
Feb 2026AML OceanographicNew marine technology platform; the current CEO stays to lead itPlatformIndustrial & ManufacturingSource
Dec 2025GAM EnterprisesNew precision motion control platform; the president becomes platform CEOPlatformIndustrial & ManufacturingSource
Oct 2025Ironwood ConsultingCalifornia biological resources and permitting firm added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
Sep 2025MeritechColorado maker of automated hygiene systems added to CFS Technologies; its CEO now runs CFSAdd-onIndustrial & ManufacturingSource
Aug 2025Van Essen InstrumentsDutch maker of groundwater monitoring equipment added to AEMAdd-onIndustrial & ManufacturingSource
Jul 2025Four Peaks EnvironmentalWashington ecology and fisheries consulting firm added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
May 2025Northwater ConsultingWater and geosciences consultant added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource
Mar 2025autoVimationGerman maker of industrial camera enclosures added to ExakteraAdd-onIndustrial & ManufacturingSource
Jan 2025EcoAnalystsAquatic ecology and habitat assessment firm added to Spheros EnvironmentalAdd-onEnvironmental & WasteSource

Portfolio by sector

From the firm's portfolio page S5.

Advanced Environmental Monitoring

  • Davis Instruments
  • Earth Networks
  • FTS Forest Technology Systems
  • High Sierra Electronics
  • LAMBRECHT meteo
  • OneRain
  • Van Essen Instruments
  • Vieux & Associates
  • WeatherWorks

AML

  • AML Oceanographic

CFS Technologies

  • Knight
  • Lafferty Equipment
  • Lavo Solutions
  • Meritech

Exaktera

  • Advanced Illumination
  • autoVimation
  • iiM AG
  • ProPhotonix
  • Z-LASER

GAM

  • GAM Enterprises
  • GAM Melior

KPM Analytics

  • AMS Alliance
  • Bruins Instruments
  • CHOPIN Technologies
  • EyePro System
  • Process Sensors
  • Sensortech Systems
  • Sightline Process Control
  • Smart Vision Works
  • Unity Scientific

Spheros Environmental

  • EcoAnalysts
  • Four Peaks Environmental
  • HydroGeoLogica
  • Ironwood
  • KP Environmental
  • LRE Water
  • Northwater Consulting
  • PanGIS
  • Panorama Environmental
  • Sonoma Technology
  • Timberline Aquatics

Greymont’s take

How Union Park Capital fits a seller

For owners of environmental consulting, ecology, water resources or permitting firms, Union Park is an active buyer through Spheros Environmental, which added seven firms between January 2025 and October 2026, five of them based in California or Washington. Makers of instruments, sensors and precision components fit its other groups. A sale usually means joining a group rather than becoming a new platform.

The firm says it buys from entrepreneurs and families and tries to keep the team, products and brand intact, and it says it does not rely on financial engineering. In the GAM and AML deals, existing leaders stayed on to run the new platforms. Because it sold Industrial Physics to KKR and Process Insights to Industrial Growth Partners in 2023, an owner who rolls equity should ask how long it expects to hold the group and what would happen to the brand as the group integrates.

Questions owners ask

Does Union Park Capital buy environmental consulting firms?

Yes, through Spheros Environmental, the group it formed in 2021. Spheros added seven firms between January 2025 and October 2026, including EcoAnalysts, Ironwood Consulting, KP Environmental, Panorama Environmental and PanGIS.

What size company does Union Park look for?

Platforms usually have $10 million to $75 million or more of revenue and take $10 million to $150 million of equity. Add-ons typically have $1 million to $50 million or more of revenue. The firm publishes no EBITDA range.

Does the owner or management stay after Union Park invests?

Often, yes. It says it wants to work with the people who built the company. AML's CEO stayed on to lead that platform in February 2026, and GAM's president became platform CEO in the December 2025 deal.

Who has Union Park sold its companies to?

Its two realized groups both went to other private equity firms in 2023: Industrial Physics to KKR and Process Insights to Industrial Growth Partners. It has not announced an exit since then on its news page.

Sources

  1. S1Union Park Capital home page Accessed November 5, 2026
  2. S2Union Park Capital: Our Vision and Investment Criteria Accessed November 5, 2026
  3. S3Union Park Capital: Sectors Accessed November 5, 2026
  4. S4Union Park Capital: Our Groups Accessed November 5, 2026
  5. S5Union Park Capital: All Companies Accessed November 5, 2026
  6. S6Union Park Capital: News Accessed November 5, 2026
  7. S7Union Park Announces Final Close of Fund III (March 19, 2021) Accessed November 5, 2026
  8. S8Union Park Launches, Acquires TMI (March 17, 2014) Accessed November 5, 2026
  9. S9Union Park Capital: Contact Accessed November 5, 2026
  10. S10Union Park Capital: Investments Accessed November 5, 2026
  11. S11Union Park Capital: Spheros Environmental Accessed November 5, 2026

Compiled by Greymont Advisors from public sources, including the firm’s own website and press releases. Greymont is not affiliated with Union Park Capital. Figures are as reported on the dates shown and may have changed. Request a correction

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