Middle market private equity firm

Gainline Capital Partners

At a glance

Assets under management$1.3B (as of Jul 2023) S6
Latest fundGainline Equity Fund II, $400M (Jul 2023) S6
EBITDA range$5M to $50M S2
Deal typesPlatform, Add-on, Growth S2
GeographyNorth America S2
SectorsIndustrial & Manufacturing, Consumer & Food, Construction Services

What Gainline Capital Partners buys

Gainline Capital Partners is a Stamford, Connecticut private equity firm founded in 2015. It aims to be the first institutional investor in founder- and family-owned companies, usually taking control or majority stakes in North American businesses with about $5 million to $50 million of EBITDA. It works mainly in business services, consumer products and niche manufacturing, and also lists logistics and transportation services. Its deals include buyouts, management buyouts, recapitalizations, growth equity, corporate carve-outs and add-ons. Its second fund closed at a $400 million hard cap in July 2023, when the firm reported $1.3 billion of assets under management including co-investments.

Its newest platforms both make precision parts for medical devices: M&M International in January 2025 and ANA Global in October 2025. In each case Gainline brought in a new CEO and leadership team. With a $5 million EBITDA floor, a smaller company is more likely to meet Gainline as an add-on, as family-owned KC Tech did when it joined M&M in June 2026.

Recent deals

Announced in the 24 months before November 3, 2026.

DateCompanyTypeSectorSource
Sep 2026Core Health & FitnessSingle-asset continuation fund led by StepStone gives existing investors liquidity and adds growth capital for the commercial fitness equipment makerFund closeIndustrial & ManufacturingSource
Jun 2026KC TechFamily-owned maker of larger diameter medical tubing added to M&M InternationalAdd-onIndustrial & ManufacturingSource
Oct 2025ANA GlobalSan Diego maker of injection-molded and stamped parts for medical, automotive and industrial customers; the co-founder retired as CEO and a new team took overPlatformIndustrial & ManufacturingSource
Feb 2025Reebok global product creation, sourcing and US footwear operationsTaken on by Galaxy Universal, which also formed a joint venture to run Reebok in Europe and the UKAdd-onConsumer & FoodSource
Feb 2025IknaiaUK air quality monitoring business and its Airscan products added to WellStatAdd-onSource
Jan 2025M&M InternationalNew Jersey maker of small-diameter stainless-steel tubing for medical devices; a new CEO, CFO and commercial chief were appointedPlatformIndustrial & ManufacturingSource
Jan 2025IMS Technology ServicesMajority investment in a founder-led Pennsylvania audiovisual event staging, systems integration and managed services companyPlatformConstruction ServicesSource

Portfolio by sector

From the firm's portfolio page S3.

Construction Services

  • IMS Technology Services

Consumer & Food

  • Galaxy Universal

Industrial & Manufacturing

  • ANA Global
  • M&M International
  • Core Health & Fitness

Other

  • Harvest Right Listed (status not confirmed)
  • Atlantic Energy
  • WellStat

Past investments: Source Advisors

Greymont’s take

How Gainline Capital Partners fits a seller

Gainline suits a founder or family that has never taken outside capital and wants a professional partner to build out the company. Its playbook centers on professionalizing the business, and in its two newest platforms that meant a new leadership team: ANA Global's co-founder retired as CEO when Gainline invested, and M&M International got a new CEO, CFO and commercial chief. An owner who wants to keep running the company should raise that early.

Gainline can also hold a company for a long time. In September 2026 it moved Core Health & Fitness, owned since 2020, into a continuation fund led by StepStone instead of selling it. An owner should ask how much equity they can roll over, how long Gainline expects to hold the business, and whether it sees the company as a new platform or an add-on.

Questions owners ask

What size companies does Gainline Capital Partners invest in?

Its stated range is mainly $5 million to $50 million of EBITDA for North American platforms, typically through control or majority stakes. Smaller businesses can join as add-ons, as KC Tech did when it was sold to M&M International in 2026.

Does Gainline only buy companies outright?

Mostly it takes control, but its strategy page also lists recapitalizations, management buyouts, growth equity, corporate carve-outs and add-on acquisitions.

How large are Gainline's funds?

Its second fund, Gainline Equity Fund II, closed at a $400 million hard cap in July 2023, after a $155 million first fund in 2019. The firm then reported $1.3 billion of assets under management including co-investments.

Sources

  1. S1Gainline Capital Partners home page Accessed November 3, 2026
  2. S2Gainline Capital Partners: Strategy Accessed November 3, 2026
  3. S3Gainline Capital Partners: Investments Accessed November 3, 2026
  4. S4Gainline Capital Partners: Team Accessed November 3, 2026
  5. S5Gainline Capital Partners: News Accessed November 3, 2026
  6. S6Gainline Capital Partners Closes $400 Million for Fund II at Hard Cap (July 21, 2023) Accessed November 3, 2026
  7. S7Gainline Closes Single-Asset Continuation Fund for Core Health & Fitness (September 8, 2026) Accessed November 3, 2026
  8. S8M&M International Acquires KC Tech (June 30, 2026) Accessed November 3, 2026
  9. S9Gainline Capital Partners Announces Partnership with ANA Global (October 14, 2025) Accessed November 3, 2026
  10. S10Galaxy Universal Acquires Reebok's Global Product Creation, Sourcing and US Footwear License (February 19, 2025) Accessed November 3, 2026
  11. S11WellStat Acquires Iknaia (February 5, 2025) Accessed November 3, 2026
  12. S12Gainline Capital Partners Acquires Manufacturer M&M International (January 21, 2025) Accessed November 3, 2026
  13. S13Gainline Capital Partners Announces Partnership with IMS Technology Services (January 15, 2025) Accessed November 3, 2026

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

For business owners

Thinking about selling? Start here.

We work for the buyers, so owners never pay us a fee or a share of proceeds. See what your business could be worth and how many buyers fit a company like yours, or start a confidential conversation.

What Is My Business Worth? Who Would Buy My Company?